JP5138583B2 - FUEL CELL AND ELECTRONIC DEVICE HAVING THE FUEL CELL - Google Patents

Description

  The present invention relates to a fuel cell and an electronic device including the fuel cell.

A fuel cell that generates power by supplying fuel and an oxidizing gas to an electrolyte member is known (for example, Patent Document 1). In general, in a fuel cell, a fuel flow path for supplying fuel to an electrolyte member and an oxygen flow path for supplying oxidizing gas to the electrolyte member are formed by pipes. The oxygen channel also serves as a channel for discharging water generated by the power generation in the electrolyte member. Note that the fuel cell of Patent Document 1 includes a lid body and a base that sandwich an electrolyte member, and a groove is provided on the surface of the base facing the electrolyte member to form a fuel flow path.
JP 2004-146080 A

  When the pipe or the like forming the flow path is arranged around the base body holding the electrolyte member, the fuel cell is increased in size. Further, when water generated in the electrolyte member adheres to the side surface of the oxygen channel, the cross-sectional area of the channel through which the oxidizing gas can pass is substantially reduced, and the introduction of the oxidizing gas into the electrolyte member is hindered. In particular, if the diameter of the oxygen flow path is reduced with the miniaturization of the fuel cell, the generated water may completely block the oxygen flow path, and oxygen may not be supplied to the fuel cell.

  An object of the present invention is to provide a fuel cell capable of downsizing and removing moisture from an oxygen flow path.

  A fuel cell according to a first aspect of the present invention includes an electrolyte member, a base body that holds the electrolyte member, a hollow portion of the base body, an oxygen channel that guides oxygen to the electrolyte member, and a hollow space of the base body. And a water inflow passage through which the water generated in the electrolyte member flows is formed.

  Preferably, the water inflow passage is formed to have a diameter capable of sucking water adhering to the side surface of the oxygen passage by capillary action.

  Suitably, the said water inflow path is connected to the exterior of the said base | substrate.

  Preferably, a fuel flow path that is formed by a hollow portion of the base and through which fuel supplied to the electrolyte member flows is provided, and the water inflow path is connected to the fuel flow path.

  Preferably, a water storage part is provided in the water inflow path.

  Preferably, a water flow control element for controlling the flow of water in the water inflow path is provided.

  Preferably, a concentration sensor for detecting the concentration of fuel in the fuel flow path, and a control unit configured to control the operation of the water flow control element based on the concentration detected by the concentration sensor, Prepare.

  Preferably, the base is connected to the water inflow path, and is configured to be detachable from a water storage cartridge capable of storing water in the water inflow path.

  Preferably, the side surface of the oxygen channel has an uneven shape.

  Suitably, the said uneven | corrugated shape consists of the level | step difference which cross | intersects the flow direction of the said oxygen flow path.

  Preferably, the side surface of the oxygen channel protrudes inward on the outer side of the water inflow channel.

  An electronic device according to a second aspect of the present invention includes an operation unit and a display unit provided in a housing, an operation control unit that controls display content of the display unit based on input information from the operation unit, And a fuel cell that is housed in a casing and supplies power to the operation unit, the display unit, and the operation control unit.

  Preferably, it is configured to control the supply of fuel or oxidizing gas to the electrolyte member of the fuel cell according to the operating status of at least one of the display unit, the operation unit, and the operation control unit. The reaction control part is provided.

  According to the present invention, it is possible to reduce the size of the fuel cell and to remove moisture from the oxygen channel.

1 is an external perspective view showing a fuel cell according to an embodiment of the present invention. Sectional drawing in the II-II arrow direction of FIG. FIG. 2 is an exploded perspective view of a base body of the fuel cell in FIG. 1. FIG. 2 is an exploded perspective view of a base body of the fuel cell in FIG. 1. The perspective view which shows the outline | summary of the fuel flow path and conductive path of the fuel cell of FIG. The figure which shows the fuel flow path near the battery main body of the fuel cell of FIG. The block diagram which shows the structure of the electric system of the fuel cell of FIG. The figure which shows the modification of the fuel storage part of the fuel cell of FIG. FIG. 2 is a schematic perspective view of a mobile phone to which the fuel cell of FIG. 1 is attached and detached. Sectional drawing in the XX arrow direction of FIG. The block diagram which shows the structure of the electric system of the mobile telephone of FIG. The figure explaining the principle of an electroosmotic flow type flow control element. The figure which shows the example of the arrangement position of a fuel flow control element. The figure which shows the example of the fuel flow control element containing a vibrating body. The figure which shows the example of an electroosmotic flow type flow control element. The figure which shows the communicating member of the electroosmotic flow type flow control element of FIG. The figure which shows the other example of the communicating member of an electroosmotic flow type flow control element. The figure which shows the other example of the communicating member of an electroosmotic flow type flow control element. The figure which shows the example of arrangement | positioning of the electrode of an electroosmotic flow type flow control element. The figure which shows the example of arrangement | positioning of the electrode of an electroosmotic flow type flow control element. The figure which shows the flow control element array which arranged the electroosmotic flow type flow control element. The figure which shows the shield conductor which shields an electroosmotic flow type flow control element. Sectional drawing which shows notionally the fuel cell which formed the water inflow path. Sectional drawing which shows the modification of an oxygen flow path.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Fuel cell, 2 ... Base | substrate, 12 ... Air flow path (oxygen flow path), 17 ... Fuel flow path, 21 ... Electrolyte member, 251, 253, 258 ... Water inflow path.

  1A and 1B are perspective views showing an appearance of a fuel cell 1 according to an embodiment of the present invention, and FIG. 1A is a view of the first surface (one main surface) S1 of the fuel cell 1, FIG. 1B is a view seen from the second surface (other main surface) S2 side which is the back surface of the first surface S1. 1A and 1B conceptually show the fuel cell 1 and show a large opening of an air passage 12 to be described later.

The fuel cell 1 includes a base body 2 formed in a substantially rectangular parallelepiped shape. The base 2 is made of, for example, a ceramic multilayer substrate. That is, the base 2 is formed in a substantially thin rectangular parallelepiped shape, and a plurality of first insulating layers 3A to 7G (hereinafter referred to as insulating layers 3A to 3G) having the same width, thickness, and shape are distinguished from each other. Without being referred to as “insulating layer 3”). The insulating layer 3 is, for example, alumina ceramics, and is formed including, for example, a glass component made of SiO ₂ , Al ₂ O ₃ , MgO, ZnO, B ₂ O _3, and alumina particles. The laminated insulating layer 3 is baked, for example, in an air atmosphere of 900 ° C. to 1600 ° C.

  The number of the insulating layers 3 constituting the substrate 2 is seven as an example, and the number of the insulating layers 3 may be set as appropriate. The plurality of insulating layers 3 may not have the same width, thickness, and shape. However, if the plurality of insulating layers 3 have the same width, thickness, and shape, the manufacturing cost is reduced.

  The first surface S1 is provided with a plus terminal 5P and a minus terminal 5N (hereinafter sometimes referred to as “terminal 5” without distinguishing between them) for supplying power from the fuel cell 1 to the electronic device. ing. The terminal 5 is made of, for example, a metal plate-like member that is placed on the first surface S1.

  The first surface S1 is formed with a recess 2a, and various electronic components are arranged in the recess 2a. The various electronic components are, for example, a power supply device 6, a control device 7, a capacitor 8, and a fuel flow control element power supply device 9, which will be described later.

  The second surface S <b> 2 is formed with a recess 2 b that accommodates a battery body 15 (not shown in FIGS. 1A and 1B), which will be described later, and the recess 2 b is closed by the lid 11. A plurality of, for example, four recesses 2 b and lids 11 are arranged on the second surface S <b> 2 corresponding to the number of battery main bodies 15. The lid 11 is formed of, for example, the same material as that of the insulating layer 3 and has an insulating property. Therefore, the lid 11 can also be regarded as one of the insulating layers 3 constituting the base 2.

  FIG. 2 is a cross-sectional view in the direction of arrows II-II in FIG. 1A. However, FIG. 2 conceptually shows the configuration of the base 2 and shows all of a supply section 17a, a discharge section 17c, and a conductive path 18 which are not in the same section, which will be described later. 3A to 3D and FIGS. 4A to 4B are exploded perspective views of the base 2. However, FIGS. 3A to 3D and FIGS. 4A to 4B conceptually show the structure of the base 2, and the fuel flow path 17 is shown larger than FIG. For this reason, the relative position of the fuel flow path 17 and the conductive path 18 is slightly deviated from FIG. 2 and FIG. Details of the conductive path 18 are omitted.

  As shown in FIG. 2, inside the base body 2, a battery main body 15 that generates power by a chemical reaction between fuel and oxygen, a fuel storage section 16 that stores fuel to be supplied to the battery main body 15, and a fuel storage section 16. A fuel flow path 17 for guiding the fuel stored in the battery body 15 to the battery body 15 and a conductive path 18 for guiding power from the battery body 15 are provided.

  The battery body 15 is a so-called unit cell, which is arranged in the same plane and is connected to each other by a conductive path 18. However, the unit cells may be stacked, may be arranged at different positions in both a plan view and a side view, or only one unit cell may be provided. Moreover, you may set the number arrange | positioned suitably. If a plurality of unit cells are arranged at different positions in plan view, the cathode electrode side of each cell can be brought close to the atmosphere, so that air can be easily introduced and the thickness can be reduced. Furthermore, it is easy to connect the unit cells in series or in parallel, and a high current or a high voltage can be easily obtained.

  The battery body 15 includes an electrolyte member 21, and an anode electrode 22 and a cathode electrode 23 that are disposed with the electrolyte member 21 interposed therebetween. The battery body 15 is composed of, for example, a direct methanol fuel cell, and the electrolyte member 21 is composed of an ion conductive film. The anode electrode 22 and the cathode electrode 23 are made of a porous member that supports a catalyst such as platinum, and have both functions of a catalyst layer and a gas diffusion layer.

  The battery body 15 is formed to have a thickness equivalent to that of the insulating layer 3, for example, and is fitted and inserted into a hole 101 (see also FIG. 4B) provided in the sixth insulating layer 3F. It is fixed inside the base body 2 by being sandwiched between the lid body 11. In other words, the opening is accommodated in the recess 2 b provided on the second surface S <b> 2 of the base 2, and the opening of the recess 2 b is closed by the lid 11.

  Since the battery body 15 is disposed in the hole 101 of the sixth insulating layer 3F, the distance to the first surface S1 is equivalent to the thickness of the five sheets of the insulating layer 3, and up to the second surface S2. The distance is equivalent to the thickness of one insulating layer 3. That is, the battery body 15 is disposed closer to the second surface S2 because the distance to the second surface S2 is shorter than the distance to the first surface S1. As a result, the degree of freedom of arrangement of the fuel flow path can be improved, oxygen in the atmosphere can be easily taken in, and highly efficient power generation is possible.

  The recess 2b that houses the battery body 15 is formed by a hole 101 of the sixth insulating layer 3F and a hole 102 (see also FIG. 4C) provided in the seventh insulating layer 3G. The lid 11 has a smaller diameter than the hole 102 and is fixed in contact with the sixth insulating layer 3F at the periphery of the hole 101. The lid 11 is fixed using, for example, an appropriate fixing member such as solder, resin, adhesive, or screw. The lid body 11 has a thickness equivalent to that of the insulating layer 3, and the lid body 11 is disposed so as not to protrude from the second surface S2. Thereby, there is no protrusion on the battery main body 15, and the size can be reduced.

  However, the thickness of the battery body 15 and the thickness of the lid 11 are not limited to the same thickness as the insulating layer 3 and may be set as appropriate. The insulating layer 3 may be thinner or thicker, or may be a thickness corresponding to a plurality of insulating layers 3. In particular, the battery body 15 is thicker than the insulating layer 3 or thicker than a plurality of the insulating layers 3, and the battery body 15 is compressed by the lid 11 so that the battery body 15 has the same thickness as the insulating layer 3. Or it is good to make it the same thickness as several sheets of the insulating layers 3. Thereby, the electrical connection between the electrode of the battery body 15 and the conductive path 18 can be made more reliable.

  FIG. 5 is a perspective view showing the fuel storage section 16, the fuel flow path 17, and the conductive path 18. However, FIG. 5 shows an outline of the fuel storage unit 16, the fuel flow path 17, and the conductive path 18, and details such as wiring from the conductive path 18 to the various electronic components 6 to 9 are omitted.

  As shown in FIGS. 2 and 5, the fuel storage unit 16 includes, for example, holes 104 </ b> A to 108 </ b> A and holes 104 </ b> B to 108 </ b> B (FIG. 3B to FIG. 3B) provided in the second insulating layer 3 </ b> B to the sixth insulating layer 3 </ b> F, respectively. See also 4B. Storage spaces 25A and 25B formed by communication of additional symbols A and B may be omitted (see also FIG. 5; additional symbols A and B are omitted) They may not be distinguished from each other.) The holes 104 to 108 are formed in, for example, the same size and the same shape, and are provided at positions facing each other between the second insulating layer 3B to the sixth insulating layer 3F. (Quadrangular prism). The storage space 25A and the storage space 25B are partitioned by a partition wall 16a, and the partition wall 16a is provided with a hole 16b that communicates the storage spaces 25A and 25B. The storage space 25 is filled with fuel such as methanol or hydrogen gas through an opening (not shown).

  The fuel flow path 17 is formed by connecting groove portions (hollow portions) provided in the insulating layer 3 to each other. In addition, in this application, a groove part shall include what penetrates the insulating layer 3 in the thickness direction (hole part). The groove part which comprises the fuel flow path 17 is formed by cutting the insulating layer 3 before lamination | stacking.

  The fuel flow path 17 includes a supply unit 17a that guides the fuel in the fuel storage unit 16 to the cell body 15 (in the direction of the arrow y1), a contact unit 17b that communicates with the supply unit 17a and contacts the anode electrode 22 of the cell body 15. And a discharge part 17c that communicates with the contact part 17b and returns the fuel in contact with the battery body 15 to the fuel storage part 16 (in the direction of the arrow y2). The fuel flow path 17 includes the respective portions 17 a to 17 c, thereby forming a circulation path for guiding the fuel from the fuel storage unit 16 and returning the fuel to the fuel storage unit 16.

  The fuel flow path 17 is arranged three-dimensionally. Specifically, it is as follows.

  As shown in FIGS. 5 and 2, for example, the supply unit 17 a communicates with the storage space 25 </ b> A of the fuel storage unit 16 between the fifth insulating layer 3 </ b> E and the sixth insulating layer 3 </ b> F. It extends slightly in parallel with the insulating layer 3 between the fifth insulating layer 3E and the sixth insulating layer 3F (see also the groove 110 in FIG. 4B). Next, it extends to the first surface S1 side so as to penetrate the fifth insulating layer 3E and the fourth insulating layer 3D (see also the hole 111 in FIG. 4A and the hole 112 in FIG. 3D). Thereafter, the gap extends between the fourth insulating layer 3D and the third insulating layer 3C in parallel with the insulating layer 3 (see also the groove 113 in FIG. 3C). In the middle, as shown in FIG. 5, the two battery main bodies 15 on the back side of the paper and the two battery main bodies 15 on the front side of the paper correspond to the same plane (in the same insulating layer). Branches into the back side of the paper and the front side of the paper. Thereafter, as shown in FIG. 2, the flow path corresponding to the battery main body 15 on the right side of the paper is branched from the flow path parallel to the insulating layer 3 in the direction perpendicular to the insulating layer 3 and reaches the battery main body 15 (see FIG. 2). (See also 3D hole 114 and hole 115 in FIG. 4A). In addition, the flow path parallel to the branched insulating layer 3 is bent in a direction orthogonal to the insulating layer 3 at a position corresponding to the battery main body 15 on the left side of the paper, and reaches the battery main body 15 (hole portion in FIG. 3D). 116 and also the hole 117 in FIG. 4A). By branching in the direction orthogonal to the insulating layer 3 in this way, turbulent flow can be efficiently generated at the branch point in the orthogonal direction, and mixing of fuel (for example, a mixed solution of methanol and water) is favorably performed. Can be done.

  For example, the discharge part 17c communicates with the storage space 25B of the fuel storage part 16 between the second insulating layer 3B and the third insulating layer 3C, and the second insulating layer 3B and the third insulating layer 3C from the fuel storage part 16 Extending in parallel with the insulating layer 3 (see also the groove 119 in FIG. 3B). In the middle of the process, as shown in FIG. 5, corresponding to the two battery main bodies 15 on the back side of the paper and the two battery main bodies 15 on the front side of the paper, Branches to the front side of the page. Thereafter, as shown in FIG. 2, the flow path corresponding to the battery main body 15 on the right side of the paper is branched from the flow path parallel to the insulating layer 3 in the direction perpendicular to the insulating layer 3 and reaches the battery main body 15 (see FIG. 2). 3C hole 120, hole 121 in FIG. 3D and hole 122 in FIG. 4A). Further, the flow path parallel to the branched insulating layer 3 is bent in a direction orthogonal to the insulating layer 3 at a position corresponding to the battery main body 15 on the left side of the paper, and reaches the battery main body 15 (hole portion in FIG. 3C). 123, see also hole 124 in FIG. 3D and hole 125 in FIG. 4A). Note that the direction of fuel flow in the discharge portion 17c is reverse to the order of description of each portion of the discharge portion 17c.

  A portion (between the third insulating layer 3C and the fourth insulating layer 3D) extending in parallel to the insulating layer 3 of the supply portion 17a, and a portion (second and third insulating layers 3B and 3D) extending in parallel to the insulating layer 3 of the discharge portion 17c. And 3 insulating layers 3C) are parallel to each other in a side view (viewed in a direction parallel to the insulating layer 3). Further, they extend in parallel with each other at a relatively close distance in a plan view (as viewed in a direction orthogonal to the insulating layer 3). Therefore, a part of the discharge part 17c is arranged along the supply part 17a.

  Further, as shown in FIG. 5, as is clear from the arrow y1 indicating the fuel flow direction in the supply portion 17a and the arrow y2 indicating the fuel flow direction in the discharge portion 17c, the portion along the supply portion 17a of the discharge portion 17c. In, the directions of the fuel flowing through the two are opposite to each other.

  In the part where the discharge part 17c is along the supply part 17a, the distance between the two is the same as the thickness of one insulating layer 3 in a side view and is relatively close. 5 and the like exemplify a case where the discharge portion 17c is arranged slightly outside the supply portion 17a in a plan view so that the supply portion 17a and the discharge portion 17c do not merge at a portion passing through the insulating layer 3. However, for the most part, they are arranged so as to coincide with each other in plan view, and are arranged so as to be shifted from each other in plan view only in the vicinity of the part penetrating the insulating layer 3, and the distance between the discharge part 17c and the supply part 17a is set. The thickness of one insulating layer 3 may be equal. Further, when a distance is provided between the discharge part 17c and the supply part 17a in a plan view as shown in FIG. 5 or the like, the distance in the plan view is approximately equal to or less than the thickness of one insulating layer 3, for example. It may be.

  As shown in FIG. 2, the discharge portion 17c is less than the thickness of the two insulating layers 3 with respect to the first surface S1, whereas the supply portion 17a is in contact with the first surface S1. The distance is longer than the discharge portion 17c by the thickness of one insulating layer 3. In addition, the supply portion 17a has a distance from the first surface S2 that is equal to or greater than the thickness of the four insulating layers 3, and is longer than the distance between the discharge portion 17c and the first surface S1. That is, the discharge part 17c is disposed closer to the surface of the base 2 than the supply part 17a. As a result, the fluid flowing through the discharge portion whose temperature has been increased by the heat generated in the battery body 15 can be brought close to the outside air, and heat can be radiated satisfactorily.

  In the figure, the cross-sectional area before branching of the supply unit 17a or the discharge unit 17c and the cross-sectional area of each flow channel after branching are equally shown, but the cross-sectional area before branching and each flow after branching are shown. The sum of the cross-sectional areas of the roads may be equal. Thereby, the flow velocity (pressure) is kept constant before and after branching.

  The supply unit 17 a branches into four corresponding to the four battery main bodies 15 and is connected to the battery main bodies 15. However, it may be further branched after being branched into four and connected to one battery body 15 at a plurality of locations. The same applies to the discharge unit 17c. Thereby, the fuel of the same concentration can be supplied to each battery main body 15, and the power generation of each battery main body 15 can be performed efficiently without unevenness. Conversely, the supply unit 17 a and the discharge unit 17 c are not branched from the fuel storage unit 16 at all, and the discharge unit after contacting the one battery body 15 is connected to the other battery body 15. In other words, the flow paths may be connected in series to the plurality of battery main bodies 15. Thereby, the structure of each flow path becomes easy and productivity can be improved.

  6A is a top view of the contact portion 17b (viewed from a direction orthogonal to the insulating layer 3), and FIG. 6B is a cross-sectional view in the direction of arrows VIb-VIb in FIG. 6A.

  As shown in FIG. 6A, the supply unit 17a and the discharge unit 17c reach the battery body 15 at positions near the edges opposite to the battery body 15, and communicate with the end portions of the contact parts 17b. Yes. The contact portion 17b extends so as to meander from the communication position with the supply portion 17a to the communication position with the discharge portion 17c, and extends over the entire surface of the battery body 15.

  As shown in FIG. 6B, the contact portion 17 b is formed by providing a groove on the surface of the fifth insulating layer 3 </ b> E on the battery body 15 side, and is in contact with the anode electrode 22 of the battery body 15. The anode electrode 22 is formed of a porous member, and the fuel flowing through the contact portion 17 b flows to the electrolyte member 21 through the anode electrode 22. In other words, the contact portion 17 b is in contact with the electrolyte member 21.

  The lid body 11 is formed with an air flow path 12 for guiding air (oxidizing gas) to the battery body (see also FIG. 1B). The air flow path 12 of the lid 11 is formed by a portion provided so as to penetrate the lid 11 from the first surface S1 side to the battery body 15 side and a groove provided on the cathode electrode 23 side of the lid 11. Similarly to the contact portion 17b, the contact portion 17b extends in a meandering manner and extends over the entire surface of the cathode electrode 23.

  The conductive path 18 shown in FIG. 2 is provided on the base body 2 by, for example, the same manufacturing method as the conductive path in the conventional ceramic multilayer substrate. Specifically, a conductive paste containing a conductive material such as silver, copper, tungsten, molybdenum, or platinum is applied to the surface of the insulating layer 3 before lamination or formed in the through hole formed in the insulating layer 3. After filling, the insulating layer 3 is laminated and baked, whereby the substrate 2 provided with the conductive path 18 is obtained.

  Accordingly, the conductive path 18 has a portion extending in parallel to the insulating layer 3 between the insulating layer 3 and the insulating layer 3, and a portion penetrating the insulating layer 3, and is three-dimensionally arranged inside the base 2. Has been. For example, the conductive path 18 is arranged to connect four battery bodies in series. Specifically, it is as follows.

  2 and 5, the conductive path 18 penetrates the first insulating layer 3A to the fifth insulating layer 3E from the negative terminal 5N (the conductor 201 in FIG. 3A, the conductor 202 in FIG. 3B, the conductor in FIG. 3C). 203, see also the conductor 204 in FIG. 3D and the conductor 205 in FIG. 4A), and reaches the anode-side conductive film 18a facing the anode electrode 22 of the battery body 15. In practice, the power supply device 6 provided in the recess 2a (see FIG. 1A) is connected in the middle and extends from the power supply device 6 to the battery main body 15. Therefore, the shape is more complicated than the conceptual diagrams of FIGS. I am doing.

  As shown in FIGS. 6A and 6B, the anode-side conductive film 18a is formed on the anode electrode 22 side of the fifth insulating layer 3E, and is provided on the entire surface in contact with the anode electrode 22 except for the arrangement region of the contact portion 17b. ing. On the other hand, a cathode-side conductive film 18b is formed on the entire surface in contact with the cathode electrode 23 on the cathode electrode 23 side of the lid 11 except for the arrangement region of the air flow path 12 (see also FIG. 4D). The anode side conductive film 18a and the cathode side conductive film 18b function as a current collector.

  As shown in FIGS. 2 and 5, the conductive path 18 extending from the cathode-side conductive film 18 b passes through the sixth insulating layer 3 </ b> F and the fifth insulating layer 3 </ b> E, and is bent so as to be parallel to the insulating layer 3. It extends between the fifth insulating layer 3E and the fourth insulating layer 3D (see also the conductor 206 in FIG. 4B and the conductor 207 in FIG. 4A). After that, it penetrates through the fifth insulating layer 3E (see also the conductor 207 in FIG. 4A) and is connected to the anode-side conductive film 18a corresponding to the battery body 10 on the right side of the drawing. Thereafter, similarly, the conductive path 18 extends so as to connect the cathode electrode 23 and the anode electrode 22 of the adjacent battery body 15.

  The conductive path 18 extending from the cathode electrode 23 of the battery body 15 directly below the plus terminal 5P penetrates from the sixth insulating layer 3F to the first insulating layer 3A (conductor 208 in FIG. 4B, conductor 209 in FIG. 4A, FIG. 3D). Conductor 210, conductor 211 in FIG. 3C, conductor 212 in FIG. 3B, conductor 213 in FIG. 3A), and positive terminal 5P. Actually, since the power supply device 6 provided in the recess 2a (see FIG. 1A) is connected to the middle and extends from the power supply device 6 to the plus terminal 5P, the shape is more complicated than the conceptual diagrams of FIGS. I am doing.

  FIG. 7 is a block diagram showing the configuration of the electric system of the fuel cell 1. In the figure, arrows indicated by solid lines indicate signal paths, and arrows indicated by dotted lines indicate power supply paths.

  The power supply device 6, the control device 7, the capacitor 8, and the fuel flow control element power supply device 9 are accommodated in the recess 2a as shown in FIG. 1A. The recess 2a is formed deeper than the thickness (height) of the various electronic components 6 to 9 so that the various electronic components 6 to 9 do not protrude from the first surface S1. For example, the recess 2a is formed by providing a hole 131 (see also FIG. 3A) in the first insulating layer 3A.

  In addition, in FIG. 1A, the cover body etc. which cover the recessed part 2a are not provided, but there exists a merit of being cheap and good heat dissipation. However, the lid may be placed on the recess 2a. In this case, there are advantages such as waterproofing and dustproofing. When covering the recess 2a with the lid 2a, the recess 2a is made deeper than the thickness of one of the insulating layers 3 and the lid having the same thickness as the insulating layer 3 is placed, as in the case of storing the battery body 15. It may be fixed in contact with the second insulating layer 3B.

  As shown in FIG. 7, the power from the battery body 15 is supplied to the power supply device 6. The power supply device 6 is, for example, a DC / DC converter, and the direct current generated in the battery body 15 is converted into an appropriate voltage by the power supply device 6 to be used for the terminal 5, the control device 7, the capacitor 8, and the fuel flow control element. It is output to various electronic components such as the power supply device 9.

  The capacitor 8 is for stabilizing the pressure of the electric power supplied from the power supply device 6. That is, the electric power supplied from the battery main body 15 varies depending on the state of the battery main body 15, and the consumed electric power is also an operating state of various electronic components provided in the fuel cell 1 and an electronic device connected to the terminal 5. It varies depending on the operating state of Therefore, for example, when the power consumption is large, the power may be insufficient with respect to the demand. Conversely, surplus power may be generated.

  Therefore, the power supply device 6 stores power in the capacitor 8 when the power supplied from the battery body 15 exceeds the power consumption, and stores it in the capacitor 8 when the power supplied from the battery body 15 is lower than the power consumption. The supplied power is supplied to various electronic components. Thereby, an electronic device can be operated stably.

  Note that FIG. 1A illustrates a case where the capacitor 8 is configured by capacitor elements configured as independent components and attached to the recess 2a. However, since the insulating layer 3 functions as a dielectric, a conductive film disposed so as to sandwich the insulating layer 3 is provided between the insulating layers 3 or on the surface of the base 2, and part or all of the base 2 functions as a capacitor. You may make it make it.

  The control device 7 shown in FIG. 7 controls the operation of various electronic components provided in the fuel cell 1, and is composed of, for example, an IC including a CPU, ROM, RAM, and the like. Specifically, based on the fuel flow velocity detected by the flow velocity sensor 31, the operation of the fuel flow control element 32 that controls the flow of fuel is controlled, and based on the fuel concentration detected by the concentration sensor 33, The operation of the concentration adjusting device 34 for controlling the concentration of fuel is controlled. Control of fuel flow is control of fuel flow rate and flow rate.

  The flow rate sensor 31 includes, for example, a resistor that is in contact with the flow path and a resistance meter that measures the resistance value of the resistor (both not shown). Measure using the change of. In this case, the resistor, the conductive path 18 connecting the resistor and the resistance meter, and the conductive path 18 connecting the resistance meter and the control device 7 are provided in the insulating layer 3 before lamination, for example, It is provided in the recessed part 2a etc. after baking.

  Note that the flow velocity sensor 31 is not limited to the above configuration, and may be configured by an appropriate sensor such as one using a Pitot tube. Like the battery main body 15, a recess may be provided in a part of the base 2 so as to communicate with the fuel flow path 17, the sensor may be arranged, and the recess may be covered with a lid. Moreover, since the cross-sectional area of the fuel flow path 17 is constant, the measurement of the flow velocity and the measurement of the flow rate are equivalent.

  The fuel flow control element 32 includes, for example, an electroosmotic flow control element (sometimes generally referred to as an electroosmotic pump) when the fuel is an aqueous methanol solution. A flow control element power supply 9 and a positive electrode 36P and a negative electrode 36N (hereinafter, sometimes referred to as “electrode 36” without being distinguished from each other) to which a voltage is applied by the fuel flow control element power supply 9 I have.

  The fuel flow control element power supply device 9 is, for example, a DC / DC converter. The electrode 36 is provided so as to be exposed to the supply unit 17a, for example, and the plus electrode 36P is disposed on the upstream side of the minus electrode 36N. The electrode 36 and the conductive path 18 connecting the electrode 36 and the fuel flow control element power supply device 9 are provided, for example, in the insulating layer 3 before lamination, and the fuel flow control element power supply device 9 fires the base 2. It is provided in the recess 2a later.

  FIG. 12 is a diagram for explaining the principle of the electroosmotic flow control element. The wall surface 3w forming the fuel flow path 17 is negatively charged when in contact with the aqueous methanol solution, and the negative charge attracts the positive charge in the solution to the wall surface 3w of the fuel flow path 17 and localizes it. When a voltage is applied across the electrodes 36 by the fuel flow control element power supply device 9, the positive charge moves in the direction of the negative electrode 36N. At that time, the entire solution flows in the direction of the negative electrode 36N in order to drag the surrounding solution. To do.

  For example, the control device 7 controls the magnitude of the voltage applied between the electrodes 36 by the fuel flow control element power supply device 9 so as to obtain a predetermined flow velocity based on the detection result of the flow velocity sensor 31. . The flow rate sensor 31 may be omitted. In this case, the control device 7 controls the operation of the fuel flow control element power supply device 9 so as to apply a preset voltage, for example, or the power generation amount of the battery body 15 detected by the power supply device 6 or the like is The operation of the fuel flow control element power supply 9 is controlled so as to have a preset value.

  For example, the concentration sensor 33 is provided in the fuel flow path 17 and has a pair of electrodes (not shown) covered with an insulating film, and a measuring instrument (capacitance) that measures the capacitance (dielectric constant) between the pair of electrodes. The fuel concentration is specified based on the measured capacitance and the correlation between the fuel concentration between the electrodes and the capacitance between the electrodes. In this case, the electrode covered with the insulating film and the conductive path 18 that connects the electrode and the measuring instrument are provided in the insulating layer 3 before lamination, for example, and the measuring instrument is provided in the recess 2 a or the like after the substrate 2 is fired. Since the insulating layer 3 itself can be an insulator that insulates the electrode from the fuel, for example, the electrodes are embedded in the third insulating layer 3C and the fourth insulating layer 3D (see FIG. 2) sandwiching the supply portion 17a, respectively. Thus, a capacitor for concentration measurement may be configured. Further, the concentration sensor 33 is not limited to the one that measures the capacitance, and may be constituted by an appropriate one such as one that measures the boiling point of the fuel.

  For example, when the fuel is a gas such as hydrogen gas or methanol gas, the concentration adjusting device 34 is constituted by a gas-liquid separator. That is, the fuel is cooled and lowered to a predetermined temperature, the amount of saturated water vapor is reduced, and moisture is condensed, thereby removing excess moisture from the fuel and adjusting the concentration of the fuel. In this case, the gas / liquid separation chamber, the drainage path for the condensed water, and the flow path (all not shown) for allowing the refrigerant to pass through are formed in the grooves provided in the insulating layer 3 as in the fuel flow path 17 and the like. It can comprise by connecting. In addition, when the gas-liquid separator is provided with a temperature sensor, for example, it is constituted by a sensor that detects the temperature by changing the resistance value of the resistor, and is provided on the substrate 2 in the same manner as the flow rate sensor provided with the resistor. Can do.

  Based on the detection result of the concentration sensor 33, the control device 7 controls the operation of the concentration adjusting device 34 so that the temperature of the gas-liquid separation chamber becomes a temperature corresponding to the target concentration. The density sensor 33 may be omitted. In this case, the control device 7 adjusts the temperature of the gas-liquid separation chamber to a preset temperature, for example, or the power generation amount of the battery main body 15 detected by the power supply device 6 or the like becomes a preset value. The operation of the density adjusting device 34 is controlled.

  8A to 8C show modified examples of the fuel storage unit, FIG. 8A is a perspective view, FIG. 8B is a cross-sectional view in the direction of arrows VIIIb-VIIIb in FIG. 8A, and FIG. 8C is a partially enlarged view of FIG. FIG.

  The fuel storage unit 16 ′ is configured such that the fuel supply cartridge 71 can be inserted and removed. Specifically, it is as follows.

  The storage space 25 ′ of the fuel storage unit 16 ′ is formed by connecting notches provided in the second insulating layer 3 B ′ to the sixth insulating layer 3 F ′ to each other. The cutout portion is formed in, for example, a rectangular shape, and the storage space 25 ′ is formed in a rectangular parallelepiped shape.

  The cartridge 71 is formed in a shape that fits into the storage space 25 ′, and has a rectangular parallelepiped shape, for example. Similarly to the base 2 ′, the cartridge 71 may be formed by laminating ceramics, or may be formed of metal, resin, or the like. The internal space 71s of the cartridge 71 is filled with fuel such as hydrogen or methanol.

  When the cartridge 71 is inserted into the storage space 25 ′, as shown in FIG. 8B, a pipe (connection portion) 72 provided in the fuel storage portion 16 ′ is fitted and inserted into an opening 71 a provided in the cartridge 71. . At this time, as shown in FIG. 8C, the valve 73 biased by the spring 74 to close the opening 71a is pushed open by the pipe 72, so that the fuel flow path 17 ′ and the internal space 71s communicate with each other. The pipe 72 is formed of, for example, metal or resin, and two pipes are provided for supplying fuel from the cartridge 71 and returning to the cartridge 71 (only one is shown in FIGS. 8B and 8C).

  The cartridge 71 can be prevented from dropping out of the fuel storage section 16 ′ by, for example, providing the engaging section engaging with each other in the cartridge 71 and the fuel storage section 16 ′ or after inserting the cartridge 71 into the storage space 25 ′. This is done by closing the lid with a lid.

  In the fuel cell 1, a water inflow path through which water generated in the electrolyte member flows is formed separately from the air flow path 12 (oxygen flow path).

  FIG. 23A is a cross-sectional view conceptually showing a first example of a water inflow channel.

  The water inflow passage 251 is configured by connecting a groove (hollow portion) formed in the insulating layer 3 (not shown in FIG. 23A), for example, like the fuel passage 17 and the air passage 12. The water inflow channel 251 opens to the side surface of the air channel 12 and opens to the surface of the base 2 (for example, the second surface S2) and communicates with the outside. The water inflow channel 251 is set to have a smaller diameter than the air channel 12. For example, the diameter is set such that water adhering to the side surface of the air channel 12 can be sucked by capillary action. The diameter that can be sucked by capillary action is set according to the material of the substrate 2, the surface roughness, and the like.

  In the example of FIG. 23A, water generated in the battery body 15 and attached to the side surface of the air channel 12 flows into the water inflow channel 251, so that water is quickly removed from the side surface of the air channel 12. Therefore, the substantial cross-sectional area of the air flow path 12 is prevented from being reduced, and insufficient supply of air to the electrolyte member is prevented.

  Since the water inflow channel 251 sucks water on the side surface of the air channel 12 by capillary action, the water can be quickly removed from the air channel 12 without providing a pump or the like for suction.

  Since the water inflow passage 251 communicates with the outside of the base body, the water on the side surface of the air flow path 12 can be permanently removed by discharging the water flowing into the water inflow passage 251 to the outside of the base body.

  FIG. 23B is a cross-sectional view conceptually showing a second example of the water inflow channel.

  The water inflow path 253 is formed by a hollow portion of the base 2, similarly to the water inflow path 251 of the first example. The water inflow passage 253 opens to the side surface of the air flow path 12 and communicates with the supply portion 71 a of the fuel flow path 17.

  The water inflow passage 253 includes a suction passage 253a that opens to the side surface of the air passage 12, a water storage portion 253b that communicates with the suction passage 253a, and a discharge passage 253c that communicates with the water storage portion 253b and communicates with the fuel passage 17. And have.

  The suction path 253a can suck water adhering to the side surface of the air flow path 12 due to a capillary phenomenon, for example, as with the water inflow path 251 of the first example. The diameter is formed. The water storage unit 253b is formed to have a diameter larger than that of the suction path 253a and the discharge path 253b, and can retain and store the water sucked by the suction path 253a. The discharge path 253c is set to an appropriate diameter. For example, the discharge passage 253 c is formed with a smaller diameter than the fuel passage 17.

  A water flow control element 255 that controls the flow of water is provided in the discharge path 253b. The configuration of the water flow control element 255 may be the same as that of the fuel flow control element. For example, you may comprise by an electroosmotic flow type flow control element. For example, you may comprise with the pump containing the piezoelectric material mentioned later.

  The operation of the water flow control element 255 is controlled by the control device 7 via a drive unit 256 that supplies drive power to the water flow control element 255. The control device 7 calculates the target value of the water flow rate according to the difference between the detected fuel concentration and the target fuel concentration so that the water flow rate becomes the target value. The operation of the water flow control element 255 is controlled. That is, the control device 7 feedback-controls the fuel concentration while directly controlling the water flow rate.

  In the example of FIG. 23B, the same effect as the example of FIG. 23A is acquired. That is, water on the side surface of the air flow path 12 is sucked by capillary action, and a substantial cross-sectional area of the air flow path 12 is prevented from being reduced, so that insufficient supply of air to the electrolyte member can be prevented.

  Depending on the specifications of the fuel cell, it may not be preferable for water to be discharged from the fuel cell. For example, there is a case where water discharged from the fuel cell may enter an electronic device driven by the fuel cell and cause malfunction or failure. However, in the example of FIG. 23B, since the water inflow passage 253 is connected to the fuel flow passage 17, the water is not discharged to the outside of the substrate, and inconvenience due to the water being discharged is prevented.

  Moisture is required for the electrolyte member to have high proton conductivity. However, by supplying water sucked through the water inflow passage 253 to the fuel flow passage 17, the water can be replenished and power generation efficiency can be improved. . In the fuel flow path forming the circulation path, the fuel is consumed as the power is generated, the concentration decreases, and the generated water may be mixed in, so the water ratio increases relatively. However, in a fuel flow path that does not form a circulation path, there is a relatively high possibility of water shortage. Therefore, the water inflow passage 253 can replenish water particularly effectively to the fuel flow passage that does not form the circulation passage.

  Since the water inflow passage 253 is provided with the water storage portion 253b, the water can be sucked from the air flow path 12 even when it is not necessary to replenish the fuel with water, and the water flow in the air flow path 12 can be reduced. Even when the amount of water is small, the fuel channel 17 can be replenished with water. Therefore, an increase in fuel concentration due to replenishment of new fuel to the fuel flow path 17, a decrease in fuel concentration due to mixing of generated water, a fluctuation in water generation due to fluctuations in power generation, a change in temperature and humidity in the external environment Even if the moisture adhesion amount of the air flow path 12 is changed due to the above, moisture can be sucked and moisture can be appropriately supplied.

  Since the water flow control element 255 is provided in the water inflow channel 253, an appropriate amount of water can be supplied to the fuel flow channel 17, and excessive water is supplied to the fuel flow channel 17. It is possible to prevent shortage of water to be replenished. When power generation is performed in the battery main body 15, the fuel flows in the fuel flow path 17, and as indicated by Bernoulli's theorem, the water in the discharge path 253 c flows due to the pressure drop caused by the fuel flow. However, if power generation is not performed in the battery body 15, fuel may flow from the fuel flow path 17 to the water inflow path 253. However, even when power generation is stopped, the water flow control element 255 can prevent the fuel from flowing into the water inflow path 253.

  Since the operation of the water flow control element 255 is controlled based on the concentration detected by the concentration sensor 33, the fuel can be maintained at an appropriate concentration. The concentration sensor 33 may be provided at an appropriate position with respect to the communication portion between the discharge passage 253c and the fuel flow passage 17. However, if the concentration sensor 33 is provided on the downstream side of the communication portion, the operation of the water flow control element 255 can be performed. The time difference from the detection of the change in the fuel concentration caused by the operation becomes small, and the control is prevented from becoming unstable due to the control delay.

  In the example of FIG. 23B, the water storage unit 253b and the pump 255 may be omitted. Further, the discharge passage 253 c may communicate with the discharge portion 17 c of the fuel flow passage 17. In this case, for example, when the fuel flow path 17 does not constitute a circulation path, the water is simply mixed with the fuel and discharged while preventing the water from being discharged to the outside of the base 2. There is no risk of complicating fuel concentration adjustment.

  In the example of FIG. 23B, a flow rate sensor or a flow rate sensor is provided in the discharge path 253c, and the flow rate of water is calculated based on the detection value of the concentration sensor based on the detection value of the flow rate sensor or flow rate sensor. You may control so that it may become a target value. In this case, compared with the case where the flow rate of water is adjusted based only on the detection value of the concentration sensor, the feedback control can be performed by removing the time delay until the water is evenly mixed with the fuel, so the control is stabilized.

  FIG. 23C is a sectional view conceptually showing a third example of the water inflow channel.

  The water inflow channel 258 is formed by a hollow portion of the base 2, similarly to the water inflow channel 251 of the first example. Further, the water inflow channel 258 opens to the side surface of the air flow path 12 and can suck water adhering to the side surface of the air flow path 12 by capillary action.

  The base body 2 is formed with a cartridge housing portion 261 formed by connecting notches formed in the insulating layer 3 (not shown in FIG. 23C). A water storage cartridge 259 can be attached to and detached from the cartridge storage portion 261.

  The water storage cartridge 259 has the same configuration as the fuel supply cartridge 71 described with reference to FIGS. 8A to 8C, for example. That is, when the water storage cartridge 259 is inserted into the cartridge storage portion 261, the pipe 260 is fitted and inserted into the opening provided in the water storage cartridge 259, and a valve (not shown) provided in the water storage cartridge 259 is inserted. By being pushed open, the water inflow passage 258 and the internal space of the water storage cartridge 259 communicate with each other. However, the water storage cartridge 259 is inserted into the cartridge housing portion 261 in an empty state, and the water in the air passage 12 sucked by the water inflow passage 258 is guided to the water storage cartridge 259.

  In the example of FIG. 23C, the same effect as in the example of FIG. 23A can be obtained. That is, water on the side surface of the air flow path 12 is sucked by capillary action, and a substantial cross-sectional area of the air flow path 12 is prevented from being reduced, so that insufficient supply of air to the electrolyte member can be prevented.

  Since the water sucked through the water inflow path 258 is guided to the water storage cartridge 259 that can be attached to and detached from the base body 2, the inconvenience in the case of discharging the water to the outside of the base body 2 is eliminated as in the example of FIG. At the same time, the stored water can be easily removed by replacing the water storage cartridge 259.

  The fuel cell provided with the water inflow path is not limited to the example of FIGS. 23A to 23C, and various modifications are possible.

  The examples shown in FIGS. 23A to 23C can be implemented in appropriate combinations.

  For example, a water inflow passage communicating with the outside of the base body as shown in FIG. 23A is connected to a water storage section as shown in FIG. 23B or a water storage cartridge as shown in FIG. Only when the water storage cartridge is full or when the user performs a discharge operation, water is discharged to the outside of the substrate through the water inflow passage communicating with the outside of the substrate, as shown in FIG. 23A. A water inflow passage communicating with the outside of the substrate and a water passage communicating with the fuel passage as shown in FIG. 23B are connected, and water is discharged to the outside of the substrate when it is not necessary to supply water to the fuel passage. You may do it. The water storage part formed in the middle of the water inflow path connected to the fuel flow path shown in FIG. 23B may be constituted by the water storage cartridge shown in FIG. 23C.

  The water inflow channel is not limited to the one that sucks water adhering to the side surface of the oxygen channel by capillary action. For example, a water flow control element may be provided in the water inflow path, and water attached to the side surface of the oxygen flow path may be sucked by a suction force generated by the water flow control element.

  FIG. 9 shows a cellular phone (portable electronic device) 501 as an electronic device to which the above-described fuel cell 1 is mounted. The mobile phone 501 is configured as a so-called foldable mobile phone, and a transmitting housing 502 and a receiving housing 503 are rotatably connected.

  The transmitter case 502 is provided with an operation unit 504 that receives an input operation to the mobile phone 501. Various push buttons such as a dial key 505 and a cursor key 506 are arranged on the operation unit 504. The receiving case 503 is provided with a display unit 507 for displaying various types of information. The display unit 507 is configured by a liquid crystal display, for example.

  FIG. 10 is a cross-sectional view in the direction of arrows XX in FIG. The transmitter case 502 includes an upper cover 502a on the operation unit 504 side, a lower cover 502b on the back side (the lower side in the drawing), and a lid 502c that covers the lower cover 502b. The fuel cell 1 is stored in a battery storage portion 502d formed by a lower cover 502b and a lid body 502c.

  The fuel cell 1 is stored in the battery storage portion 502d with the first surface S1 side facing the inside of the transmitter case 502, and the lid 502c is covered on the second surface S2 side. The lower cover 502 b is provided with a terminal 511 at a position facing the terminal 5, and the electric power of the fuel cell 1 is supplied to various electronic components of the cellular phone 501 by connecting the terminal 5 and the terminal 511 in contact with each other. To be supplied.

  For example, a circuit board 510 provided with a high-frequency circuit or the like is disposed on the opposite side of the lower cover 502b from the battery housing portion 502d, that is, between the upper cover 502a and the lower cover 502b.

  FIG. 11 is a block diagram showing a configuration of an electric system of the mobile phone 501. As shown in FIG. In the figure, solid arrows indicate signal paths, and dotted arrows indicate power paths.

  The electric power of the fuel cell 1 is supplied to the power supply device 512 of the mobile phone 501 through the terminal 5 and the terminal 511. The power supply device 512 converts the supplied power into a predetermined voltage and supplies it to various electronic components such as the display unit 507.

  The cellular phone 501 includes a control device (operation control unit) 513 for performing various controls. The control device 513 is configured by an IC including a CPU, a ROM, a RAM, and the like, for example. The operation unit 504 outputs a signal corresponding to the depressed key to the control device 513. The control device 513 executes processing corresponding to the signal from the operation unit 504 according to a program stored in a ROM or the like. The processing executed by the control device 513 includes, for example, control of the display unit 507, and outputs various signals to the display unit 507, such as outputting image data corresponding to display contents to the display unit 507. That is, the control device 513 controls the display content of the display unit 507 based on input information from the operation unit 504.

  In addition, the mobile phone 501 includes, for example, a high-frequency circuit for wireless communication, a microphone for transmission, a speaker for reception, a speaker used for notification of incoming calls and music reproduction, a camera module, and the like. Equipped with electronic components.

  The power consumption in the mobile phone 501 varies depending on the operating status of various electronic components such as the display unit 507. For example, the display unit 507 does not display an image while the cellular phone 501 is folded, and the power consumption is less than that when the cellular phone 501 is opened. When playing music, the power consumption by the amplifier of the speaker increases in order to increase the volume. Therefore, even if a certain amount of power is supplied from the fuel cell 1, the power supplied to the demand may be insufficient. Conversely, excessive power may be generated.

  Therefore, the cellular phone 501 controls the power generation by the fuel cell 1 so that the power generation amount of the fuel cell 1 is changed according to the operation status of various electronic components such as the display unit 507. For example, it is performed as follows.

  The control device 513 stores power consumption for each of various operations of various electronic components such as the display unit 507 in a ROM or the like. On the other hand, since the control device 513 controls the operation of various electronic components, it can grasp which operation the various electronic components are performing. Therefore, the control device 513 can calculate the necessary power in the mobile phone 501 by integrating the current power consumption of various electronic components. Note that the integrated power consumption includes a certain amount of power consumed regardless of the operation of various electronic components since the cellular phone 501 is turned on.

  Next, the control device 513 outputs the calculated necessary power to the control device 7 of the fuel cell 1. Control signal output from the control device 513 to the control device 7 is provided in the connection portion 515 provided in the casing of the mobile phone 501 and the base 2 of the fuel cell 1 and connected to the connection portion 515. This is performed via the connected portion 516.

  Then, the control device 7 of the fuel cell 1 controls the operation of the fuel flow control element 32 so that the flow rate (flow rate) of the fuel supplied to the battery body 15 becomes a value corresponding to the required power. Thereby, the power generation amount of the fuel cell 1 becomes a value according to the operating status of the mobile phone 501.

  According to the above embodiment, the base body 2 is formed by a laminated body in which a plurality of insulating layers 3 are stacked, and the grooves provided in the different insulating layers 3 are interconnected to form the fuel flow path 17. Therefore, the fuel flow path 17 can be arranged three-dimensionally. That is, the degree of freedom of arrangement of the fuel flow path 17 can be improved. In addition, since it is formed inside the base body 2, there is no need to draw a pipe around the base body 2, and the exterior of the fuel cell 1 can be simplified.

  Since the electrolyte member 21 is sandwiched between the insulating layers 3 constituting the substrate 2, the electrolyte member 21 can be disposed on the substrate 2 and the electrolyte member 21 can be insulated. That is, since the base 2 also serves as an insulator, there is no need to provide an insulator separately from the base of the fuel cell as in the prior art, and the fuel cell can be reduced in size.

  Since the insulating layer 3 is made of a ceramic material, the technology of a ceramic multilayer substrate, which has been studied conventionally, can be used. Moreover, by using alumina ceramics, the base 2 having good heat resistance and insulation can be formed.

  Since the fuel flow path 17 forms a circulation path, the fuel that has not been used for power generation despite passing through the flow path in contact with the electrolyte member is sent to the electrolyte member 21 again for reuse. can do. Since such a circulation path that enables reuse is provided inside the base body 2 formed of a multilayer substrate, the entire fuel cell system including the fuel circulation system is modularized and the entire system is downsized. Is easy. Since the power generation reaction is likely to occur in a certain temperature range (for example, 60 to 80 ° C.), this temperature range is preferable for efficient power generation. When the fuel is supplied from the external supply unit to the flow path of the base as in the prior art, there is a temperature difference between the external supply unit and the base, the temperature of the fuel tends to vary, and the efficiency decreases. In the present embodiment, the temperature change of the fuel can be reduced by forming the circulation path inside the base 2.

  Since the storage space 25A for supplying fuel to the supply unit 17a and the storage space 25B for returning fuel from the discharge unit 17c are partitioned by the partition wall 16a, relatively diluted fuel is supplied from the discharge unit 17c. Direct supply to the portion 17a is prevented. You may set suitably the shape of the partition 16a, and the position and shape of the hole 16b which connect 25 A of storage spaces, and the storage space 25B.

  Since the fuel storage section 16 connected to the fuel flow path 17 is disposed, it is possible to generate power for a long time without adding fuel from the outside of the fuel cell 1 to the fuel flow path 17. Improves. And since such a fuel storage part 16 is provided in the inside of the base | substrate 2 comprised by the multilayer board | substrate, modularization of the whole fuel cell system including a fuel supply system and size reduction of the whole system are easy. .

  Further, when the fuel storage unit 16 is configured so that the cartridge 71 for fuel supply can be inserted and removed, replacement of the cartridge 71 enables longer use and further improves portability. In addition, since the insulating recesses 3 of the cartridge 71 are formed by cutting out a part (second insulating layer 3B ′ to sixth insulating layer 3F ′) of the insulating layers 3 stacked in parallel to each other, both sides thereof are formed. The mutually parallel surfaces of the insulating layer 3 (the first insulating layer 3A ′ and the seventh insulating layer 3G ′) can be used as the sliding surface of the cartridge 71 as they are.

  Since the fuel flow path 17 has a portion that contacts the electrolyte member 21 branched into a plurality of paths, a plurality of flow paths can be formed in parallel to efficiently supply the fuel to the electrolyte member 21. In the case of forming a fuel flow path by drawing a pipe, an increase in the number of parts and a complicated exterior are caused by the branching of the flow path, that is, an increase in the flow path, but such a problem does not occur. In addition, when the flow path is branched corresponding to the plurality of electrolyte members 21, fuel can be efficiently supplied to the plurality of electrolyte members. Therefore, it is easy to increase the number of electrolyte members, and relatively many units. Modularization and miniaturization of the fuel cell including the cell are facilitated. Preferably, each of the branch paths is provided with a fuel flow control element. With such a configuration, it is possible to suppress a difference in each flow rate of the branch path and to supply a stable fuel. it can.

  Since the groove forming the fuel flow path 17 penetrates the insulating layer 3 in the thickness direction, the flow path between one insulating layer (for example, between the third insulating layer 3C and the fourth insulating layer 3D), and the other The flow paths between the insulating layers (for example, between the fifth insulating layer 3E and the sixth insulating layer 3F) can be communicated, and the three-dimensional fuel flow path 17 can be easily formed.

  A terminal 5 for outputting electric power is provided on the surface of the base 2, and a conductive path 18 that electrically connects the terminal 5 and the electrolyte member 21 is provided inside the base 2. There is no need to draw around the battery and the exterior can be simplified. Moreover, it is easy to modularize and downsize the output system of the fuel cell from the electrolyte member to the output terminal via the conductive path.

  Since the discharge part 17c after being in contact with the electrolyte member 21 is arranged closer to the surface of the base 2 than the supply part 17a before being in contact with the electrolyte member 21, the heat of the fuel flowing through the discharge part 17c is transferred to the base. 2 can be efficiently discharged from the surface. Note that, for example, the discharge area may be meandered along the surface of the substrate to increase the projected area on the surface of the substrate, thereby improving the heat dissipation.

  Further, since at least a part of the discharge part 17c is arranged along the supply part 17a, heat is exchanged between the discharge part 17c and the supply part 17a, and the heat generated by the chemical reaction in the electrolyte member 21 is obtained. It can be dispersed efficiently.

  Further, since the direction of the fuel flowing through the portion arranged along the supply unit 17a of the discharge unit 17c is opposite to the direction of the fuel flowing through the supply unit 17a, the heat between the supply unit 17a and the discharge unit 17c. Exchange can be performed efficiently. This is because the fuel flowing through the discharge part 17c is more likely to accumulate heat on the front side (downstream side) where the flow direction and the heat propagation direction coincide with each other than on the rear side (upstream side). This is due to flowing relatively low temperature fuel.

  Since the fuel flow control element 32 for controlling the flow of the fuel in the fuel flow path 17 is provided, the power generation amount can be controlled in accordance with various conditions such as the operating status of the electronic components inside and outside the fuel cell. . Since the fuel flow control element 32 is provided inside the base body 2 formed of a multilayer substrate, it is easy to modularize and downsize the control system for the power generation amount by flow control.

  Since the fuel flow control element 32 is formed of an electroosmotic flow control element, the fuel flow control element 32 can be reduced in size. In addition, since the fuel can be controlled with a uniform flow compared to other flow control elements, a stable power generation amount can be obtained. Further, when the fuel flow control element 32 is provided inside the multilayer substrate, the fuel flow control element 32 can be formed by using the groove formed in the insulating layer 3.

  Since the concentration adjusting device 34 that removes moisture from the fuel flowing through the fuel flow path 17 and adjusts the concentration of the fuel is provided, the fuel is prevented from being diluted by excess moisture. For example, in direct methanol, in order to prevent methanol crossover, the flow of methanol from the anode side to the cathode side is prevented, so that water generated in the electrolyte member 21 is excessively mixed in the methanol aqueous solution. There is a fear, and such a fear can be eliminated.

  Since the terminal 5 electrically connected to the electrolyte member 21 is provided on the first surface S1 of the base 2 and the electrolyte member 21 is disposed near the second surface S2 of the base 2, the electrolyte member 21 The generated water or the like is prevented from entering an electronic device connected to the terminal 5 side or an electronic component inside the electronic device.

  Since the recess 2b for accommodating the electrolyte member 21 is provided on the second surface S2 of the base 2 and the opening of the recess 2b is closed by the lid 11 having the air flow path 12, the insulating layer 3 The electrolyte member 21 can be disposed after stacking, and the fuel cell can be easily modularized and downsized. Moreover, the electrolyte member 21 and the outside air are only separated from each other by the lid body 11, and since the through-hole is provided in the lid body 11, air can be efficiently guided to the electrolyte member 21, and the efficiency In particular, the water produced by the electrolyte member 21 is discharged.

  The electrolyte member 21 is provided inside the base body 2 made of a multilayer substrate, and various electronic components such as the control device 7 driven by the electric power supplied from the electrolyte member 21 are arranged. It becomes easy.

  Since the fuel cell 1 is modularized and miniaturized by a base body 2 made of a multilayer substrate, the portability, sustainability, ease of attachment / detachment, etc. are high, and the fuel cell 1 can be used as a portable electronic device such as a cellular phone 501. By providing, the portability and handleability of the portable electronic device are also improved.

  Further, in the cellular phone 501, since the fuel supply to the electrolyte member 21 of the fuel cell 1 is controlled according to the operation status of the electronic components such as the display unit 507, power generation according to the required power can be performed. Generation of power shortage and surplus power can be suppressed. Moreover, since the fuel cell 1 is formed by the base body 2 made of a multilayer substrate and is modularized including the control device 7 and the like, it is possible to cause the fuel cell to bear part or all of the control of the fuel supply. it can.

  The present invention is not limited to the above embodiment, and may be implemented in various aspects.

  The electrolyte member includes all kinds of materials such as a solid polymer type, a phosphoric acid type, an alkali type, a molten carbonate type, and a solid oxide type. The oxidizing gas may be a gas containing at least oxygen, and is not limited to air.

  The insulating layer that is laminated to form the substrate is not limited to one made of a ceramic material. For example, the insulating layer may be formed of a heat resistant resin. In addition, insulating layers made of different materials may be stacked. The ceramic material is not limited to alumina ceramics, and may be, for example, glass ceramics, zirconia ceramics or silicon carbide ceramics not containing an alumina component. In particular, alumina ceramics and glass ceramics are preferable because an electronic circuit can be easily formed on a substrate with good electrical characteristics. In addition, it has excellent corrosion resistance against fuels such as methanol and water, and can effectively prevent the penetration of fuel, and can effectively prevent the wiring conductor from corroding due to the penetration of fuel.

  You may set suitably the magnitude | size and shape of the flow path formed by the groove part (a hole part is included) provided in an insulating layer, or a groove part. Therefore, the groove may not penetrate the insulating layer in the thickness direction, and the discharge part may not be disposed closer to the surface of the substrate than the supply part, or at least a part of the discharge part is supplied. The direction of the fluid in the discharge unit may be the same as the direction of the fluid in the supply unit. In any case, by forming the groove in the insulating layer before lamination, the flow path can be formed at an arbitrary position inside the substrate, so that the effect of improving the degree of freedom in arrangement can be achieved.

  The shape and size of the fuel storage part may be set as appropriate as in the flow path. For example, in the embodiment, the fuel storage space is formed by leaving one insulating layer on the first surface S1 side and the first surface S2 side, but the storage space or the wall of the storage space is formed by the number of insulating layers. It is appropriate to form the part.

  Various electronic components can be selected as the electronic components that are provided inside or on the surface of the substrate and driven by the power supplied from the fuel cell. For example, the electronic component may be necessary for a function as a fuel cell, or may perform a function completely different from the function as a fuel cell.

  Examples of the former include the control device 7, the capacitor 8, and the fuel flow control element 32 in the embodiment. In addition to those described in the embodiment, for example, in order to prevent the fuel cell or the like inside the base body or the fuel inside the base body from becoming hot due to some cause, the temperature sensor is installed inside or on the surface of the base body. It may be arranged at a plurality of positions, and when temperature equal to or higher than the reference temperature is detected, processing such as stopping power generation may be executed. Thereby, a fuel cell can be used stably over a long period of time.

  The latter includes, for example, a speaker with a built-in amplifier that amplifies an external signal and converts it into an audio signal, or a volatile recording medium that holds information input via a computer or the like. In addition, when it has the electronic component which performs a function completely different from the function as a fuel cell in a base | substrate or gas surface, the fuel cell of this invention can also be regarded as an electronic device containing a fuel cell.

  In any case, when an electronic component is provided inside the substrate and on the surface of the substrate, the substrate is formed of a multilayer substrate, so that modularization and miniaturization are easy.

  The fuel flow control element and the concentration adjusting device are not essential requirements of the present invention, and the fuel flow control element and the concentration adjusting device are provided with a supply unit, a contact unit, a discharge unit, and a fuel as long as fuel is present. It may be provided in any of the storage units. The flow control elements such as the fuel flow control element and the water flow control element are not limited to the electroosmotic flow control element, and may be, for example, a check valve flow control element that feeds fluid by vibrating a diaphragm. The flow control element is not limited to one that sends out fuel or one that sends out water. For example, an oxidizing gas may be sent out.

  13A to 13C are diagrams showing examples of arrangement positions of fuel flow control elements.

  In FIG. 13A, the supply part 17a of the fuel flow path 17 is branched into a plurality corresponding to the plurality of battery main bodies 15, and the fuel flow control element 32-1 is provided upstream of the branch point. Note that the branching direction (downward direction in the drawing) is, for example, the thickness direction of the laminated substrate as shown in FIG.

  In FIG. 13A, a temperature sensor (temperature detection element) 79 is provided. The temperature sensor 79 includes, for example, a resistor and a resistance meter that measures the resistance value of the resistor (both not shown), and detects a change in the resistance value according to a temperature change of the resistor. To detect the temperature. The resistor may be formed by printing a metal paste on a ceramic green sheet (insulating layer 3) before firing, or may be constituted by general-purpose parts such as a thermistor, as in the conductive path 18 and the like. . An appropriate number of temperature sensors 79 (resistors) are provided at appropriate positions. For example, the temperature sensor 79 is disposed at a position in contact with the battery main body 15, a position in contact with the fuel flow path 17, a substrate surface not in contact with the battery main body 15 or the fuel flow path 17, or the inside of the base. By providing such a temperature detection element, stable power generation can be performed.

  The detection signal of the temperature sensor 79 is output to the control device 7 in the same manner as the flow rate sensor 31 of FIG. 7 and the like, and the control device 7 controls the operation of the fuel flow control element 32-1 based on the temperature information from the temperature sensor 79. To do. For example, when the temperature detected by the temperature sensor 79 is higher than a predetermined threshold, the control device 7 reduces the amount of fuel supplied or operates the fuel flow control element 32-1 to stop. Control. Alternatively, the control device 7 holds data that can specify the correlation among the temperature, the fuel supply amount, and the power generation amount in the battery main body 15, and the detected temperature with reference to the data, The fuel supply amount is calculated from the current required power generation amount, and the operation of the fuel flow control element 32-1 is controlled so that the calculated fuel supply amount is obtained.

  In the example of FIG. 13A, the supply unit 17a branches into a plurality of parts, so that the fuel can be efficiently supplied to the plurality of battery main bodies 15, and the fuel flow control element 32-1 is connected to the plurality of branch flow paths. Therefore, the number of fuel flow control elements 32-1 can be reduced to reduce the cost.

  Further, since the flow of the fuel is controlled based on the temperature information from the temperature sensor 79, an excessive temperature rise of the fuel cell can be prevented. Further, the power generation amount of the battery body 15 changes depending on the temperature, and stable power generation can be performed by controlling the fuel supply amount according to the temperature change.

  In FIG. 13B, the supply part 17a of the fuel flow path 17 branches into a plurality corresponding to the plurality of battery main bodies 15, and the fuel flow control element 32- 2 is provided. The plurality of fuel flow control elements 32-2 may have the same configuration and ability, or may be different. The plurality of fuel flow control elements 32-2 may be controlled independently, or may be controlled in common (with the same control amount). Further, the branching direction (the downward direction in the drawing) is, for example, the thickness direction of the laminated substrate as shown in FIG.

  Also in FIG. 13B, an appropriate number of temperature sensors 79 (resistors) may be provided at appropriate positions. For example, the temperature sensor 79 is provided at a position where the temperature of each of the plurality of battery main bodies 15 can be detected (position adjacent to the battery main body 15).

  In the example of FIG. 13B, the supply unit 17a branches into a plurality of parts, so that the fuel can be efficiently supplied to the plurality of battery main bodies 15, and the fuel flow control element 32-2 is provided to each of the plurality of branch flow paths. By providing, the fuel can be sent to each branch flow path at an appropriate flow rate. For example, it is possible to prevent a decrease in the amount of fuel that is sent to the cell body 15 that is far from the fuel flow control element. Since the plurality of battery main bodies 15 are arranged at different positions, the amount of oxidizing gas supplied, the heat flux when radiating heat, etc. are different, and the appropriate fuel supply amount is different, but the fuel is supplied according to the arrangement position. it can. An appropriate fuel supply amount may be different for each battery body 15 by providing battery bodies 15 having different capacities or having different power supply destinations (electronic parts) for each of the battery bodies 15. It can cope with such a case. When a temperature sensor 79 is provided for each of the plurality of battery main bodies 15 and the fuel supply amount is controlled for each of the plurality of battery main bodies 15 according to the detection result of each temperature sensor 79, the temperature sensor 79 is suitable for the temperature of each battery main body 15. Fuel supply amount.

  In FIG. 13C, the supply portion 17a of the fuel flow path 17 is branched into a plurality corresponding to one battery body 15, and the fuel flow control element 32- 3 is provided. The plurality of branch passages are connected to a plurality of appropriate positions of the contact portion 17b of the fuel passage 17 shown in FIGS. 5, 6A and 6B, for example. In addition, a plurality of discharge portions 17c of the fuel flow path 17 also extend from a plurality of appropriate positions of the contact portion 17b and merge. Note that the branching direction (downward direction in the drawing) is, for example, the thickness direction of the laminated substrate as shown in FIG.

  In the example of FIG. 13C, the supply portion 17a branches into a plurality of parts, so that the fuel can be efficiently supplied to one battery body 15, and the fuel flow control element 32-3 is connected to the plurality of branch flow paths. By providing each, fuel can be sent to each branch flow path at an appropriate flow rate.

  14A and 14B each show an example in which a vibrating body that vibrates a wall surface forming the fuel flow path 17 is provided as a fuel flow control element. The vibrating body is, for example, a piezoelectric body that expands and contracts according to the magnitude of an applied voltage.

  The fuel flow control element 32-4 in FIG. 14A includes a piezoelectric body 81 and a pair of electrodes 82P and 82N that apply a voltage to the piezoelectric body 81 (simply referred to as “electrodes 82”, which may not be distinguished from each other). I have.

The piezoelectric body 81 is, for example, piezoelectric ceramic. Piezoelectric ceramics are formed by, for example, polarizing a sintered body such as a Pb (Zr, Ti) O ₃ system. The piezoelectric body 81 has, for example, a thickness equivalent to that of the single insulating layer 3 and is fitted into a hole formed in the single insulating layer.

  The electrodes 82P and 82N are arranged so as to sandwich the piezoelectric body 81 in a direction orthogonal to the fuel flow path 17. The electrode 82N faces a portion of the fuel flow path 17 formed in parallel with the insulating layer. In other words, the piezoelectric body 81 faces the fuel flow path 17 via the electrode 82N.

  The configuration of the electric system of the fuel cell including the fuel flow control element 32-4 is the same as that shown in FIG. However, the electrode 82 is connected to the fuel flow control element power supply 9 '(voltage control unit, corresponding to the fuel flow control element power supply 9 in FIG. 7). By providing the voltage controller in this way, stable fuel supply can be performed, and the stability of power generation can be improved. The electrode 82 and the fuel flow control element power supply device 9 ′ are connected by a conductive path 18. The fuel flow control element power supply 9 ′ applies a voltage to the electrode 82. The piezoelectric body 81 expands and contracts in accordance with the fluctuation of the voltage applied through the electrode 82, vibrates the electrode 82 N that is a part of the wall surface forming the fuel flow path 17, and pressurizes the fuel in the fuel flow path 17. Is granted.

  The fuel flow control element 32-4 is configured as a valveless flow control element that prevents a reverse flow to the fuel inflow side by making the fluid resistance on the fuel inflow side larger than the fluid resistance on the outflow side. For example, the inflow passage 83 connected to the region facing the piezoelectric body 81 has a smaller cross-sectional area than the outflow passage 84. For this reason, when the pressure applied to the fuel by the piezoelectric body 81 increases, turbulent flow is more easily formed in the inflow passage 83 than in the outflow passage 84, and the fluid resistance increases. As a result, the flow rate flowing back to the inflow passage 83 is less than the flow rate flowing to the outflow passage 84.

  The fuel flow control element 32-4 is manufactured as follows, for example. First, a hole for embedding the piezoelectric body 81 is formed in the ceramic green sheet (insulating layer 3) before firing by laser processing or punching. Next, a piezoelectric ceramic (piezoelectric body 81) before firing is embedded in the hole, and a metal paste (electrode 82) is provided on both sides of the piezoelectric ceramic. Then, a plurality of ceramic green sheets in which grooves (fuel flow path 17, inflow path 83, outflow path 84) are formed are stacked and fired.

  The operation of the fuel flow control element 32-4 is controlled by the control device 7 similarly to the fuel flow control element 32 of FIG. The fuel flow control element 32-4 is also an example of the fuel flow control elements 32-1 to 32-3 in FIGS. 13A to 13C and is controlled based on the detection result of the temperature sensor 79. Specifically, the control device 7 applies a voltage to the electrode 82 and varies the applied voltage by the fuel flow control element power supply device 9 ′. For example, the control device 7 sets the potential of the electrode 82N to the reference potential and vibrates the potential of the electrode 82P between the reference potential and a potential higher than the reference potential. Thereby, the piezoelectric body 81 expands and contracts and pressure is applied to the fuel. The control device 7 changes the amplitude and frequency of the applied voltage according to the detection result of the temperature sensor 79 and the like.

  The fuel flow control element 32-5 in FIG. 14B includes a piezoelectric body 81 and a pair of electrodes 82 for applying a voltage to the piezoelectric body 81, similarly to the fuel flow control element 32-4. However, the fuel flow control element 32-5 includes a plurality of combinations of the piezoelectric body 81 and the electrode 82 along the fuel flow path 17, and is configured as a traveling wave type flow control element. That is, the fuel flow control element 32-5 is configured as a valveless flow control element that prevents back flow of fuel by expanding and contracting the plurality of piezoelectric bodies 81 at different timings.

  Also by the fuel flow control element 32-4 and the fuel flow control element 32-5 of FIG. 14A, the same effect as the fuel flow control element 32 of the embodiment can be obtained. That is, the amount of power generation can be controlled according to various conditions such as the operating status of the electronic components inside and outside the fuel cell, and the fuel flow control element 32 is provided inside the base body 2 formed of a multilayer substrate. Therefore, it is easy to modularize and downsize the power generation control system by flow control.

  The flow control element including the vibrator shown in FIGS. 14A and 14B can function as a water flow control element if provided in the water inflow path instead of the fuel flow path.

  Note that the flow control elements such as the fuel flow control element and the water flow control element including the vibrator may be implemented in various modes.

  The vibrating body is not limited to a piezoelectric body (piezoelectric element) as long as it can vibrate a wall surface forming a flow path such as a fuel flow path or a water inflow path. In other words, the actuator of the vibrating body may be constituted by an appropriate one. For example, an electrostatic type that uses electrostatic attraction, an electromagnetic type that uses magnetic force, a thermal type that uses expansion of a member due to heating, an SMA type that uses deformation according to temperature changes of a shape memory alloy (shape memory alloy type) The actuator of the vibrating body may be constituted by the actuator of The wall surface forming the flow path may be the surface of the vibrator itself.

In addition to piezoelectric ceramics, piezoelectric materials are made of suitable materials such as quartz, single crystals such as LiNbO ₃ , LiTaO ₃ and KNbO ₃ , thin films such as ZnO and AlN, and piezoelectric polymer films such as polyvinylidene fluoride (PVDF). A piezoelectric body may be used.

  The piezoelectric body may have any structure such as a monomorph, a bimorph, and a laminated type. Further, the piezoelectric body may not only vibrate the wall surface of the flow path such as the fuel flow path or the water inflow path by an expansion / contraction action, but may also vibrate the wall face by slip deformation.

  The piezoelectric body may not be as thick as one insulating layer, and may be thinner or thicker than one insulating layer. In addition, the arrangement position of the piezoelectric body may not be a position facing a portion extending in parallel with the insulating layer in the flow path such as the fuel flow path or the water inflow path, and a portion of the flow path orthogonal to the insulating layer, You may arrange | position so that a bending part, a branch part, etc. may face suitable positions.

  The electrode is only required to be able to apply a voltage to the piezoelectric body so as to vibrate a wall surface that forms a flow path such as a fuel flow path or a water inflow path in the piezoelectric body, and is limited to an electrode that sandwiches the piezoelectric body in a direction orthogonal to the flow path. Not. For example, the electrodes may be arranged so as to sandwich the piezoelectric body in the direction along the flow path. The flow control element may not be a valveless flow control element, and a check valve may be provided.

  15 to 22 show preferred examples of electroosmotic flow control elements. As shown in FIG. 12, in the electroosmotic flow control element, the positive charge in the fuel is attracted to the wall surface of the fuel flow path 17 by the negative charge charged on the wall surface of the fuel flow path 17. Is moved by the electrode 36 to cause the fuel to flow. Therefore, if the contact area between the fuel and the wall surface in contact with the fuel is increased, the fuel can flow more efficiently by attracting the positive charge of the fuel to the wall surface. Below, the specific example which enlarged the contact area of a fuel and a wall surface is shown.

  The fuel flow control element 32-11 in FIG. 15 is a pair of electrodes 36-1P and 36-1N (hereinafter simply referred to as “electrodes 36-1”), similar to the fuel flow control element 32 shown in FIG. And the fuel is caused to flow by applying a voltage to the electrode 36-1. However, the fuel flow control element 32-11 may not be distinguished from the communication members 91-2 and 91-3 described later by omitting the communication member 91-1 (hereinafter, "-1") between the electrodes 36-1. Yes.)

  16A is a perspective view of the communication member 91-1, FIG. 16B is a view (plan view) of the communication member 91-1 viewed in the flow path direction of the fuel flow path 17, and FIG. 16C is a view taken along the line XVIc-XVIc in FIG. It is sectional drawing of a direction.

  The communication member 91-1 is made of a porous body made of ceramics, for example. The porous body allows a liquid (fuel) to permeate by three-dimensionally coupling a plurality of hole portions 92 formed therein.

  The porosity of the porous body is preferably 20% or more from the viewpoint of reducing fuel pressure loss and improving fuel fluidity. Moreover, 80% or less is good from a viewpoint of performing localization of electrification of fuel efficiently. Therefore, the porosity of the porous body is preferably 20 to 80%. More preferably, it is 40 to 60% from the viewpoint of keeping the strength of the substrate high. The porosity is obtained by calculating an average area ratio Sr of the hole 92 from images of a plurality of cut surfaces and calculating the 3/2 power of the calculated average area ratio Sr. Moreover, the average cross-sectional area S of the hole 92 calculated from the image of the cut surface is preferably 25 to 40,000 square micrometers, more preferably 3000 to 10,000 square micrometers.

  The communication member 91-1 is formed in a substantially cylindrical shape, for example. As shown in FIG. 15, the column height of the communication member 91-1 is, for example, equal to the thickness of one insulating layer 3. The communication member 91-1 is held by the single insulating layer 3 in a portion of the fuel flow path 17 that penetrates the insulating layer 3. That is, the fuel flow path 17 is configured by mutually connecting grooves provided in parallel to different insulating layers 3 by holes penetrating the insulating layer 3 and the like disposed therebetween, and the communication member 91-1 , Provided in a hole (connecting portion) for connecting the grooves.

  The electrodes 36-1P and 36-1N are formed in, for example, a flat plate shape, and are arranged at positions where the end faces of the communication member 91-1 face each other on the wall surface forming the fuel flow path 17. In other words, it is arranged so as to be orthogonal to the fuel flow direction. The electrodes 36-1P and 36-1N have, for example, the same area as the cross-sectional area of the communication member 91-1.

  The fuel flow control element 32-11 is manufactured as follows, for example. First, a hole for embedding the communication member 91-1 is formed in the ceramic green sheet (insulating layer 3) before firing by laser processing or punching. Next, the hole is filled with a ceramic paste having more resin components than the ceramic green sheet. For example, the resin content of the ceramic paste is set to 2 to 10 times the resin content of the ceramic green sheet constituting the substrate 2. And the ceramic green sheet provided with the metal paste (electrode 36-1) etc. is laminated | stacked on the ceramic green sheet, and it bakes. The ceramic paste becomes a porous communication member 91-1 when the resin component volatilizes. That is, the communication member 91-1 is integrally formed from the same material as the insulating layer 3. When the communication member 91-1 is formed of the same material as that of the insulating layer 3 constituting the base 2, the stress due to the difference in thermal expansion can be suppressed, and damage to the communication member 91-1 can be effectively suppressed. The communicating member 91-1 may be configured by embedding a porous member in a ceramic green sheet before firing.

  According to the fuel flow control element 32-11, the communication member 91-1 disposed in the fuel flow path 17 is formed of a porous body, and the fuel is compared with the case where the communication member 91-1 is not disposed. Then, since the contact area with the wall surface in contact with the fuel is increased, localization of the charge of the fuel can be promoted and the fuel can be efficiently flowed.

  Since the communication member 91-1 is formed of the same material as that of the base body 2, a deviation due to thermal expansion hardly occurs between the base body 2 and the communication member 91-1, and durability is improved.

  Since the communication member 91-1 is disposed in a portion of the fuel flow path 17 that penetrates the insulating layer 3, a hole is provided in the insulating layer 3, and the communication member 91-1 is disposed in the hole. The communication member 91-1 can be easily formed. In particular, when a material containing a resin component is placed in the insulating layer 3 before firing and fired to form a porous body, the pores are simply filled with the material containing the resin component. 1 is easy to form.

  17A to 17C show other examples of the communication member, FIG. 17A is a perspective view, FIG. 17B is a view seen in the flow path direction of the fuel flow path 17, and FIG. 17C is an arrow line XVIIc-XVIIc in FIG. It is sectional drawing of a viewing direction.

  For example, the outer shape of the communication member 91-2 shown in FIGS. 17A to 17C is the same as that of the communication member 91-1, and is arranged at the arrangement position of the communication member 91-1 shown in FIG. The communication member 91-2 is provided with a plurality of holes 94 penetrating in the flow path direction of the fuel flow path 17. The diameter of the hole 94 is preferably 50 micrometers or less from the viewpoint of efficiently localizing the electrification of the fuel, and more preferably, the fluidity is improved and the strength of the substrate 2 is kept high. From the viewpoint, it is 5 to 30 micrometers.

  The communication member 91-2 is manufactured as follows, for example. First, the hole used as the hole part 94 is formed in the site | part used as the communicating member 91-2 by laser processing or stamping to the ceramic green sheet (insulating layer 3) before baking. And the ceramic green sheet provided with the metal paste (electrode 36-1) etc. is laminated | stacked on the ceramic green sheet, and it bakes. That is, the communication member 91-2 is integrally formed of the same material as the insulating layer 3. When the communication member 91-2 is formed of the same material as that of the insulating layer 3 constituting the base 2, the stress due to the difference in thermal expansion can be suppressed, and damage to the communication member 91-2 can be effectively suppressed. The communicating member 91-2 may be configured by embedding a member in which the hole 94 is formed in a ceramic green sheet before firing.

  According to the communication member 91-2, the same effect as that of the communication member 91-1 can be obtained. That is, it is possible to increase the contact area between the fuel and the wall surface in contact with the fuel, promote the localization of the charge of the fuel, and allow the fuel to flow efficiently.

  Since the communication member 91-2 is disposed in a portion of the fuel flow path 17 that penetrates the insulating layer 3, the hole 94 can be directly formed in the insulating layer 3 to configure the communication member 91-2. And easy to manufacture.

  18A to 18C show other examples of the communication member, FIG. 18A is a perspective view, FIG. 18B is a view seen in the flow direction of the fuel flow path 17, and FIG. 18C is an arrow line XVIIIc-XVIIIc in FIG. It is sectional drawing of a viewing direction.

  The communication member 91-3 in FIGS. 18A to 18C is formed, for example, in the same manner as the communication member 91-1, and is arranged at the arrangement position of the communication member 91-1 shown in FIG. The communication member 91-3 is provided with a plurality of slits 96 penetrating in the flow path direction of the fuel flow path 17. The width (diameter) of the slit 96 is preferably 50 micrometers or less from the viewpoint of efficiently localizing the electrification of the fuel. More preferably, the fluidity is improved and the strength of the substrate 2 is kept high. From the viewpoint of doing, it is 5 to 30 micrometers. The communication member 91-3 is formed in the same manner as the communication member 91-2, for example.

  According to the communication member 91-3, the same effects as those of the communication member 91-1 and the communication member 91-2 are obtained. That is, it is possible to increase the contact area between the fuel and the wall surface in contact with the fuel, promote the localization of the charge of the fuel, and allow the fuel to flow efficiently.

  19A and 19B show a modification of the arrangement of the electrodes of the electroosmotic flow control element, FIG. 19A is a cross-sectional view, and FIG. 19B is a perspective view.

  The electrodes 36-2P and 36-2N (hereinafter simply referred to as “electrodes 36-2”, which may not be distinguished from each other) of the fuel flow control element 32-12 are formed in a cylindrical shape, for example. Of the flow path 17, the communication member 91 is disposed on the wall surface of the portion that penetrates the insulating layer 3. In other words, the electrode 36-2 is disposed along the fuel flow direction. For example, the electrode 36-2 is filled with a metal paste in a hole formed in a ceramic green sheet (insulating layer 3) before firing, and is filled with a resin at the center, and the ceramic green sheet is used as another ceramic green sheet. It is formed by laminating with a sheet and baking to volatilize the resin.

  20A and 20B show a modification of the arrangement of the electrodes of the electroosmotic flow control element, FIG. 20A is a cross-sectional view, and FIG. 20B is a perspective view.

  The electrodes 36-3P and 36-3N (hereinafter simply referred to as “electrode 36-3”, which may not be distinguished from each other) of the fuel flow control element 32-13 are, for example, the same shape as the cross-sectional shape of the communication member 91. It is formed in a flat plate shape (for example, a circle) and is disposed on the end surface of the communication member 91. A plurality of holes 98 are provided in the electrode 36-3.

  For example, when the communication member 91 is the communication member 91-1 made of a porous body, the hole 98 is formed in an appropriate shape at an appropriate position, and the communication member 91 is formed with the hole 94. In the case of the communication member 91-2, the hole 94 is formed in the same size as the hole 94 at the arrangement position of the hole 94, and the communication member 91 is the communication member 91-3 in which the slit 96 is formed. The slit 96 is formed in a slit shape having the same size as the slit 96. That is, the fuel can pass through the hole 98 of the electrode 36-3 and also through the communication member 91 to flow through the fuel flow path 17.

  In the electrode 36-3, for example, after arranging a member to be the communication member 91 on the ceramic green sheet (insulating layer 3) before firing, a metal paste is provided on the communication member 91, and the hole 98 is formed by laser processing or punching. The ceramic green sheet is formed and laminated with another ceramic green sheet and fired. Note that the hole 94 of the communication member 91-2 and the slit 96 of the communication member 91-3 may be formed simultaneously with the formation of the electrode hole 98.

  As shown in FIGS. 15, 19A, and 20A, when the communication member 91 is disposed, the pair of electrodes may be appropriately disposed as long as the communication member 91 can be disposed between the electrodes. However, when an electrode is provided on the surface along the insulating layer 3 as shown in FIG. 15, it is only necessary to dispose a metal paste on the surface of the insulating layer 3 before firing, and the formation is simple. When providing an electrode on a surface orthogonal to the insulating layer 3 as shown in FIG. 19A, the electrode can be disposed adjacent to the communication member 91 orthogonal to the insulating layer 3. As shown in FIG. 20A, when an electrode is provided on the end surface of the communication member 91, it is easy to form and the electrode can be disposed adjacent to the communication member 91.

  FIG. 21 shows a fuel flow control element array in which a plurality of fuel flow control elements 32-13 each composed of a communication member 91 and a pair of electrodes 36-3 facing each other with the communication member 91 interposed therebetween are arranged in series and in parallel. Section 32-15 is shown.

  For example, the fuel flow path 17 includes a first parallel portion 17e along the insulating layer 3, a second parallel portion 17f separated from the first parallel portion 17e by a plurality of layers, a first parallel portion 17e, and a second parallel portion 17f. And a plurality of penetrating portions 17g penetrating the plurality of insulating layers 3. The plurality of through portions 17g are adjacent to each other. In the through portion 17g, fuel flow control elements 32-13 are provided at a plurality of locations. For example, fuel flow control elements 32-13 are provided every other layer. The number of fuel flow control elements 32-13 arranged in the parallel direction (the number of the plurality of through portions 17g) is, for example, 100 to 500, and the number of fuel flow control elements 32 arranged in the series direction is, for example, 10-20. It is.

  The plurality of fuel flow control elements that constitute the fuel flow control element array section are not limited to the fuel flow control element 32-3, but are shown in FIG. 19 or the fuel flow control element 32-1 shown in FIG. Such a fuel flow control element 32-2 may be used. When arranging a plurality of fuel flow control elements, only the series or only the parallel may be used. In the case where a plurality of fuel flow control elements are arranged in series, they may be arranged in series in the direction along the insulating layer, or may be connected in a zigzag manner without being connected linearly. Further, when a plurality of fuel flow control elements are arranged in parallel, they may be arranged in parallel in a direction orthogonal to the insulating layer. It may be arranged in parallel in a straight line or in parallel in a plane.

  22A and 22B show an example in which a shield conductor 231 surrounding the electroosmotic flow control element is provided, FIG. 22A is a sectional view, and FIG. 22B is a perspective view.

  The shield conductor 231 includes, for example, a flat conductor 232 formed in a flat shape along the insulating layer 3 and a via conductor 233 formed so as to penetrate the insulating layer 3. Two flat conductors 232 are arranged so as to sandwich the fuel flow control element 32-1 in a direction (vertical direction in the drawing) perpendicular to the insulating layer 3. A plurality of via conductors 233 are provided so as to connect the two flat conductors 232 and surround the communication member 91. The interval between the via conductors 233 is, for example, ½ or less, preferably ¼ or less, of the target noise wavelength. The shield conductor 231 is connected to the minus terminal 5N via the conductive path 18 (including the conductor layer). That is, the shield conductor 231 is connected to the reference potential (ground).

  The flat conductor 232 is formed by providing a metal paste on the surface of the ceramic green sheet (insulating layer 3) before firing. The via conductor 233 is formed by providing a hole in a ceramic green sheet before firing by punching or laser processing and filling the hole with a metal paste.

  In the example of FIGS. 22A and 22B, the noise that enters the electroosmotic flow control element is reduced by the shield conductor 231 and the noise emitted from the electroosmotic flow control element is reduced. Accordingly, an error in fuel flow control by the electroosmotic flow control element is reduced, and malfunction of an electronic component provided in the fuel cell and an electronic component driven by the fuel cell is also prevented.

  Since the shield conductor 231 includes the via conductor 233, it is easy to form the shield conductor 231 so as to block noise that enters and radiates in the direction along the insulating layer 3.

  The shield conductor 231 may be provided so as to surround the fuel flow control element (vibrating body) when the fuel flow control element is made of a vibrating body such as a piezoelectric body.

  The electroosmotic flow control element shown in FIGS. 15 to 22 can function as a water flow control element if provided in the water inflow path instead of the fuel flow path.

  The electroosmotic flow type fuel flow control element and the water flow control element may be implemented in various modes other than the above.

  The electroosmotic flow control element may be one in which fuel or water flows to the high potential side, or may flow to the low potential side. Whether the wall surface in contact with fuel or water is positively charged or negatively charged is determined by the material of the fuel, the wall surface forming the flow path such as the fuel flow path and the water flow path, and the communication member. The

  The communicating member is not limited to one made of ceramics as long as it can attract positive charge or negative charge of fuel or water by contacting with fuel or water. The communicating member does not have to be as thick as one insulating layer, and may be thinner or thicker than one insulating layer. The cross-sectional shape of the communication member may be set as appropriate. In addition, the communication member may be disposed at a position that does not pass through the insulating layer in the flow path such as the fuel flow path or the water inflow path. Etc., and may be arranged at an appropriate position.

  Note that the flow control element may be capable of flowing fuel or water in a direction opposite to the reference flow direction. Alternatively, some of the flow control elements among the plurality of flow control elements may cause fuel or water to flow in the opposite direction to the other flow control elements. For example, when a plurality of the fuel flow control elements 32-4 shown in FIG. 14A are provided, in some of the fuel flow control elements 32-4, the cross-sectional area of the inflow passage 83 is larger than the cross-sectional area of the outflow passage 84. It may be set. In the fuel flow control element 32-5 shown in FIG. 14B, the fuel flow control element power supply device 9 'causes the fuel to flow in the reverse direction by changing the timing of the voltage fluctuation applied to the plurality of electrodes 82. May be. In the electroosmotic flow control element shown in FIG. 7 and the like, the fuel flow control element power supply device 9 may cause the fuel to flow in the reverse direction by switching between positive and negative voltages applied to the pair of electrodes. The flow control element gives the fuel or water a force that causes the fuel or water to flow in the opposite direction, thereby quickly decelerating or stopping the fuel or water, and appropriately controlling the power generation amount, heat generation amount, and fuel concentration. be able to.

  In the case of controlling the power generation amount according to the operating status of the electronic device, it is only necessary to finally control the power generation amount, and the method is not limited to fuel control. For example, the amount of oxygen supplied to the electrolyte member may be controlled. In this case, for example, an electromagnetic valve or a flow control element may be provided in the air flow path to control the amount of oxygen.

  Moreover, the reaction control part which controls electric power generation amount may be provided in the fuel cell, and may be provided in the main body of the electronic device to which a fuel cell is connected. Further, when the reaction control unit is configured by the control unit of the fuel cell and the control unit of the electronic device main body, the division of roles between the two may be appropriately set. For example, the control unit of the electronic device main body may calculate not only the necessary power but also the flow rate of the fuel corresponding to the power and output the calculated fuel flow rate to the control unit of the fuel cell. However, processing based on the characteristics of the electronic device main body, such as calculation of required power, is borne by the control unit of the electronic device main body, and processing based on the characteristics of the fuel cell, such as calculation of the flow rate corresponding to the required power, is controlled by the fuel cell. The fuel cell compatibility becomes higher when the load is imposed on the part. Further, the display unit and the operation unit may be provided in the fuel cell.

  The oxygen channel is formed by a hollow portion of the base body 2, and the side surface of the oxygen channel, that is, the side surface of the hollow portion of the base body 2 constituting the oxygen channel may be a smooth surface or a rough surface ( Uneven shape).

  FIG. 24A is a cross-sectional view showing a modified example in which the side surface 264 of the oxygen channel 263, that is, the side surface of the hollow portion of the base 2 constituting the oxygen channel is uneven. For example, the side surface 264 has a concavo-convex shape by forming a plurality of convex portions 264 a (concave portions 264 b) over the entire length and the entire circumference of the oxygen channel 263. The convex portion 264a (the concave portion 264b) can be formed by, for example, etching or blasting. Here, the uneven shape refers to, for example, the difference in height between the convex portion 264a and the concave portion 264b adjacent to the convex portion 264a (or the difference between 264a and the surrounding flat portion). The shape is larger than the maximum diameter (diameter) of the flow path at the opening of the water inflow channel that opens to the top.

  In the present invention, as described above, the water inflow passage 251 (253, 258 is also the same, hereinafter, only the reference numeral 251 is provided) through which water adhering to the side surface of the oxygen passage 263 flows is provided. It is suppressed that water is excessively attached to the side surface 264 of the oxygen channel 263 and the cross-sectional area of the oxygen channel 263 is reduced. Therefore, by making the side surface 264 concavo-convex shape, water that is not preferably originally attached to the side surface 264 is actively attached to the side surface 264, so that water can be allowed to actively flow into the water inflow passage 251; And / or water can be suppressed from being discharged from the oxygen channel 263 and affecting the electronic circuit outside the fuel cell in the vicinity of the oxygen channel 263.

  In addition, the convex part 264a (concave part 264b) may be provided only in a part of the flow path direction of the oxygen flow path 263 and / or a part of the circumferential direction. For example, the convex portion 264a (recessed portion 264b) is more upstream than the water inflow channel 251 in the flow direction of the oxygen channel 263 (from the inner side of the base body 2, the lower side in FIG. 24A) than the water inflow channel 251. Provided only in a part of the range on the downstream side (outside of the base body 2, upper side in FIG. 24A), provided only in a part or all of the upstream side of the water inflow channel 251, or water inflow It may be provided only in a part or all of the downstream side of the path 251. Further, in the circumferential direction of the oxygen channel 263, the convex portion 264a (the concave portion 264b) may be provided only in a partial range on the side where the water inflow channel 251 is provided. The arrangement and shape of the protrusions 264a (recesses 264b) may be irregular or regular, as shown in FIG. 24A.

  FIG. 24B is a cross-sectional view showing another modified example in which the side surface 266 of the oxygen channel 265 has an uneven shape. In this modification, the concavo-convex shape is composed of a step 266a that intersects the flow direction of the oxygen flow channel 265 (the vertical direction in FIG. 24B). The step 266a is formed by, for example, a part of the side surface protruding inward on the outer side of the base body 2 (downstream of the oxygen channel 265, upper side in FIG. 24B) from the water inflow channel 251. ing. For example, the surface of the water inflow channel 251 that forms the outer side of the base 2 protrudes more inside the oxygen channel 265 than the surface of the water inflow channel 251 that forms the inner side of the base 2. Is formed. The step 266a is provided over the entire circumference of the oxygen channel 265, for example. Here, the level difference is, for example, a difference in the degree of protrusion between a part of the side surface protruding inward and the other part of the side surface adjacent to and not protruding from the side surface of the air flow path 12. It is larger than the maximum diameter (diameter) of the flow path at the opening of the water inlet.

  In the step 266a, for example, the oxygen channel 265 is configured by forming holes in each of the plurality of insulating layers 3 constituting the base 2 and connecting the holes of the plurality of insulating layers 3. Of the holes of the plurality of insulating layers 3, the diameter of some of the holes can be made smaller (or larger) than the diameter of the other holes. Alternatively, it can be formed by shifting the positions of some of the holes of the plurality of insulating layers 3 from the positions of the other holes. When the step 266a is formed by shifting the positions of the holes having the same diameter, a protruding step is partially formed in the circumferential direction of the oxygen channel 265, and a recessed step is formed in the other portion.

  In this modification, since the step 266a intersects the flow direction of the oxygen flow path 265, the flow along the flow direction of water on the side surface 265 is prevented by the step 266a. Therefore, it is possible to effectively suppress the release of water from the oxygen channel 265 while adhering moisture to the unevenness formed by the step 266a. Furthermore, since the side surface 266 of the oxygen channel 265 protrudes outward from the water inflow channel 251 to form a step 266a, the dammed water can easily flow into the water inflow channel 251 to effectively The inflow channel 251 can be utilized.

  Note that a plurality of steps 266a may be provided in the direction of the flow path of the oxygen flow path 263, or may be provided on the upstream side of the oxygen flow path 263 relative to the water inflow path 251 (inside the base body, on the lower side of FIG. 24B). It may be provided on the upstream side and the downstream side. Further, the step 266a may be provided only in part in the circumferential direction of the oxygen channel 263. For example, the step 266a may be provided only in a partial range on the side where the water inflow passage 251 is provided in the circumferential direction. Further, the step 266a may be formed by forming a recess in a part of the side surface 266.

Claims (14)

An electrolyte member , and a battery body having an anode electrode and a cathode electrode arranged with the electrolyte member interposed therebetween ;
A base for holding the battery body ;
An oxygen flow path formed by the hollow portion of the substrate and guiding oxygen to the battery body ;
A water inflow passage formed by a hollow portion of the base body , opened to a side surface of the oxygen flow path, and into which water generated in the battery body flows;
Equipped with a,
A fuel cell in which the water inflow path is separated from the battery body . The fuel cell according to claim 1, wherein the water inflow passage is formed to have a diameter capable of sucking water adhering to a side surface of the oxygen passage by capillary action. The fuel cell according to claim 1, wherein the water inflow path communicates with the outside of the base body. A fuel flow path formed by a hollow portion of the base body , through which fuel supplied to the battery body flows,
The fuel cell according to claim 1, wherein the water inflow path is connected to the fuel flow path. The fuel cell according to claim 4, wherein a water storage unit is provided in the water inflow channel. The fuel cell according to claim 4, further comprising a water flow control element that controls water flow in the water inflow path. A concentration sensor for detecting the concentration of fuel in the fuel flow path;
A control unit configured to control the operation of the water flow control element based on the concentration detected by the concentration sensor;
The fuel cell according to claim 6, comprising: The fuel cell according to any one of claims 1 to 7, wherein the base body is connected to the water inflow passage and is configured to be detachable from a water storage cartridge capable of storing water in the water inflow passage. The fuel cell according to any one of claims 1 to 8, wherein a side surface of the oxygen channel has an uneven shape. The fuel cell according to claim 9, wherein the uneven shape includes a step that intersects a flow path direction of the oxygen flow path. The fuel cell according to any one of claims 1 to 10, wherein a side surface of the oxygen channel protrudes inward on an outer side than the water inflow channel. An operation unit and a display unit provided in the housing;
An operation control unit that controls display content of the display unit based on input information from the operation unit;
The fuel cell according to any one of claims 1 to 11, which is housed in the housing and supplies power to the operation unit, the display unit, and the operation control unit.
With electronic equipment. Reaction control configured to control the supply of fuel or oxidizing gas to the battery body of the fuel cell according to at least one of the display unit, the operation unit, and the operation control unit. The electronic device according to claim 12, further comprising a unit. An operation unit and a display unit provided in the housing;
An operation control unit that controls display content of the display unit based on input information from the operation unit;
In an electronic device including a fuel cell housed in the housing,
The fuel cell is
An electrolyte member , and a battery body having an anode electrode and a cathode electrode arranged with the electrolyte member interposed therebetween ;
A base for holding the battery body ;
An oxygen flow path formed by the hollow portion of the substrate and guiding oxygen to the battery body ;
A water inflow passage formed by a hollow portion of the base body , opening in a side surface of the oxygen channel, and flowing in water generated in the battery body , and
The water inflow path is separated from the electrolyte member;
The fuel cell is
An electronic device that supplies power to the operation unit, the display unit, and the operation control unit.

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