JP4806902B2 - Fuel cell wiring - Google Patents

Description

  The present invention relates to a fuel cell wiring.

  The fuel cell has a configuration in which a pair of electrodes provided with an electrolyte membrane interposed therebetween is set as one set, and a separator is inserted between each set. In other words, it can be said that a plurality of single cells each composed of an electrolyte membrane and a pair of electrodes are connected in series.

  Here, in order to detect various information (for example, temperature and pressure) for each unit cell, it is necessary to attach a sensor to each unit cell. In this case, for example, it is conceivable that a terminal with an electric wire with a sensor attached in the vicinity of the tip is arranged for each single cell, and various information sent from the sensor is detected for each single cell.

  However, in this detection method, since a plurality of electric wires are disturbed, there is a problem that workability is poor and the order of the electric wires is easily mistaken. There is also a problem that a large space is taken up by a plurality of electric wires.

As a related technique, there is one disclosed in Patent Document 1.
International Publication Number WO02 / 001659

  An object of the present invention is to enable easy connection of wiring to each separator in a fuel cell.

  The present invention employs the following means in order to solve the above problems.

That is, the fuel cell wiring of the present invention is
A planar fuel cell wiring having flexibility,
A conductive member provided on a flexible insulating substrate;
A sensor electrically connected to the conductive member;
An elastic member that is inserted into a gap between a pair of separators in a fuel cell and holds a part of the wiring body in the gap by its own elastic repulsion force;
The sensor is disposed in an insulated state with respect to the separator,
A part of the wiring body is held by the elastic member in the outer region so that the tip of the wiring is located in the outer region of the sealed region formed by the gasket provided between the pair of separators. The sensor inserted between a pair of separators is positioned while maintaining an insulating state with the separators.

According to the configuration of the present invention, a part of the wiring body (at least the part including the insulating substrate, the conductive member, and the sensor) is held by the elastic repulsive force of the elastic member. Thereby, it can suppress that the part in which the sensor in the wiring for fuel cells was provided falls from between a pair of separators. And a sensor is positioned in the clearance gap between separators only by inserting the part in which the sensor was provided between a pair of separators. In addition, since the fuel cell wiring is a flat surface having flexibility, the fuel cell wiring can be easily arranged at a free position. Furthermore, since the sensor is positioned in a region outside the sealed region formed by the gasket, adverse effects on the sealing performance can be suppressed. In order to keep the sensor insulated from the separator, an insulating part may be provided on the surface of the sensor on the fuel cell wiring side, or an insulating part may be provided on the separator surface on the separator side. it can. Further, the elastic member may be fixed to the wiring body or may be separated from the wiring body.

  The elastic repulsive force of the elastic member may be set to be smaller than the elastic repulsive force of the gasket.

  According to this structure, since the fall of the adhesive force to the separator by a gasket can be suppressed, the bad influence on sealing performance can be suppressed further.

Further, a plurality of the conductive members and a plurality of said sensors are provided for said insulating substrate,
The distance between the sensors in the longitudinal direction of the wiring is set so as to correspond to the distance between the gaps between the separators,
The insulating substrate is disposed so as to side surface facing the separator provided in the multi-layered, and the tip of each conductive member is bent together with the insulating substrate, said sensor gaps between the different separators And it is good to insert with the said elastic member .

  According to this configuration, the sensor can be disposed between the separator gaps at a plurality of locations with one fuel cell wiring, and the fuel cell wiring can be installed without taking much space. In general, it is often difficult to increase the dimensional accuracy of the gap between the separators in the fuel cell. However, according to the configuration of the present invention, the fuel cell wiring itself is flexible, and fine adjustment of the bent portions of the conductive member and the insulating member makes it possible to appropriately fit each gap even if the dimensional accuracy is not high. The tip of each conductive member (including the insulating substrate) can be inserted. In addition, a multilayer separator means that a plurality of separators are arranged, and does not necessarily mean that the separators are stacked in the vertical direction. Therefore, the case where the separators are arranged in the horizontal direction is also included. The same applies hereinafter.

  In addition, it is preferable that a reinforcing member is provided in a region including at least a part of the bent portion of the insulating substrate so that the insulating substrate can be easily bent and the strength of the insulating substrate is reinforced.

  In this way, when the insulating substrate is bent, a bending wrinkle is attached, so that the work for inserting the fuel cell wiring into the gap between the separators becomes easy. Moreover, it can suppress that a crack etc. generate | occur | produce in the bent part of an insulated substrate.

  Moreover, it is good for the front-end | tip part of the said elastic member to provide the inclined surface which assists introduction into the clearance gap between a pair of separators.

  If it does in this way, since introduction at the time of an elastic member being inserted between separators will be assisted by an inclined surface, work at the time of inserting wiring for fuel cells in a crevice between separators will become easy.

A locking portion that is hooked and locked to the step portion of the separator may be provided at the rear end portion of the elastic member.

  If it does in this way, after inserting wiring for fuel cells in the crevice between separators, it can control that the wiring concerned slips out from a crevice.

A reinforcing plate that makes the insulating substrate difficult to bend is preferably provided in the vicinity of the tip of the insulating substrate on the side inserted into the pair of separators .

  In this way, when the fuel cell wiring is inserted into the gap between the separators, the vicinity of the tip is difficult to bend, and the insertion work is facilitated.

  In addition, said each structure can be employ | adopted combining as much as possible.

  As described above, according to the present invention, wiring can be easily connected to each separator in the fuel cell.

  The best mode for carrying out the present invention will be exemplarily described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. .

  With reference to FIGS. 1-6, the fuel cell wiring of the fuel cell which concerns on Example 1 of this invention is demonstrated.

<Overview of fuel cell>
The outline of the fuel cell will be described with reference to FIG. FIG. 1 is a schematic cross-sectional view showing a state in which a fuel cell wiring according to Embodiment 1 of the present invention is incorporated in a fuel cell.

  Various known technologies can be applied to the fuel cell to which the fuel cell wiring according to this embodiment is connected. A fuel cell generally has a structure in which a plurality of unit cells are stacked. In addition, even if it says a laminated structure, it does not necessarily mean that it is used in the state piled up and down, and may be used in the state arranged in the horizontal direction. The basic configuration of the unit cell is, for example, as shown in FIG. 1, provided with an electrolyte membrane 30, a pair of electrodes 40 provided so as to sandwich the electrolyte membrane 30, and further sandwiching these electrodes 40. And a gasket 50 for sealing the region where the electrode 40 is provided.

  One of the pair of electrodes 40 is an anode electrode (fuel electrode), and the other is a cathode electrode (air electrode). The pair of electrodes 40 generates electricity by exchanging ions with the electrolyte membrane 30. Further, fuel (usually hydrogen) is supplied to the anode electrode, and air (oxygen) and water are supplied to the cathode electrode. Therefore, a sealing region is formed by the gasket 50 so that they do not leak to the outside.

  The power generation of the single battery configured in this way is generally about 0.7V. Then, by stacking a plurality of the unit cells, a structure is obtained in which the plurality of unit cells are connected in series via the separator 20 made of a conductive material, and a large power generation is obtained in the entire fuel cell.

<Usage method and usage example of fuel cell wiring>
The usage method and usage example of the fuel cell wiring 10 according to the present embodiment will be described with reference to FIG. The fuel cell wiring 10 according to the present embodiment is used in a state in which the portion provided with the sensor at the tip is inserted into the gap between the pair of separators 20. Thereby, a sensor is disposed in the gap between the separators 20. Here, the position where the sensor of the fuel cell wiring 10 is disposed is outside the sealed region formed by the gasket 50. Therefore, the gasket 50 has little influence on the sealing performance.

  As described above, by arranging the sensors in the gaps between the separators 20, various information in each single cell can be detected. Needless to say, desired information can be obtained according to the type of sensor. Specifically, the temperature of each part can be detected using a temperature sensor, and the pressure between the separators can be detected using a pressure sensor. In this embodiment, a case where a temperature sensor is used will be described below as an example.

<Details near the connection of the fuel cell wiring to the separator>
Details of the vicinity of the connecting portion of the fuel cell wiring to the separator according to this embodiment will be described with reference to FIGS. FIG. 2 is a plan view of the fuel cell wiring according to Embodiment 1 of the present invention. FIG. 3 is a schematic cross-sectional view of the fuel cell wiring according to Embodiment 1 of the present invention. 3 is a cross-sectional view taken along AA in FIG.

  The fuel cell wiring 10 according to this embodiment is a flexible planar wiring. A more specific preferred example of the fuel cell wiring 10 is a flexible printed circuit (FPC).

  The fuel cell wiring 10 includes a base film 11 as an insulating substrate, an electric wire 12 as a conductive member formed on the base film 11, and a cover film provided on the opposite side of the base film 11 via the electric wire 12. 13. Both the base film 11 and the cover film 13 have insulating properties and flexibility, and are made of, for example, a heat resistant resin material such as polyimide. Moreover, although the copper 12 is mentioned as a suitable example as a material of the electric wire 12, the other material which has electroconductivity is also applicable. Although a plurality of the electric wires 12 are provided on the base film 11, only two electric wires 12 are shown in FIG. 2 because only a part of the tip of the fuel cell wiring 10 is shown.

  Further, the fuel cell wiring 10 includes a temperature sensor 14 that is electrically connected to the two electric wires 12, and an elastic member 15 that is provided on the opposite surface of the temperature sensor 14 via the electric wires 12 and the base film 11. Is provided. The surface of the temperature sensor 14 is covered with a cover film 13 so as to maintain an insulating state with the separator 20. However, when the surface of the separator 20 can be insulated from the temperature sensor 14 such as when the surface of the separator 20 is covered with an insulating film, the surface of the temperature sensor 14 may be exposed. The elastic member 15 is made of an elastic material such as fluorine rubber, silicon rubber, EP rubber, or a spring.

  Further, when the fuel cell wiring 10 is assembled to the fuel cell, the tip thereof is bent (portion indicated by a two-dot chain line in FIG. 2). Therefore, it is preferable to provide the reinforcing member 16 in a region including at least a part of the bent portion. The reinforcing member 16 is provided to make it easier to attach the folding hooks of the fuel cell wiring 10 to improve workability, and to improve the strength so that cracks and the like do not occur in the bent portion. When the fuel cell wiring 10 is an FPC, unnecessary portions of the conductor on the insulating substrate (corresponding to the base film 11) are removed by a chemical or electrochemical method, whereby the electric wire 12 is formed. (So-called etching). Therefore, by this etching, the reinforcing member 16 can be easily formed by leaving the conductor in the region including at least a part of the portion to be bent together with the portion of the electric wire 12. In this case, the reinforcing member 16 is also made of the same material (copper or the like) as the material of the electric wire 12.

<Overall explanation of fuel cell wiring and how to incorporate it into the fuel cell>
The whole fuel cell wiring and how to incorporate it into the fuel cell will be described with reference to FIGS. FIG. 4 is a plan view of the vicinity of the end of the fuel cell wiring according to the first embodiment of the present invention. In FIG. 4, the separator 20 is also illustrated in order to schematically show the arrangement relationship with the separator 20 of the fuel cell. 5 and 6 are external views showing a state in which the fuel cell wiring according to Embodiment 1 of the present invention is incorporated in the fuel cell. In addition, in FIG. 5, the external view seen from the side incorporating the wiring for fuel cells was shown, and FIG. 6 has shown the external view seen from the side surface side. In this embodiment, a fuel cell in which five unit cells are stacked will be described as an example.

  The fuel cell wiring 10 is provided with a plurality of electric wires 12 and temperature sensors 14 with respect to one base film 11 and cover film 13. The plurality of electric wires 12 are arranged in parallel. And the temperature sensor 14 is each provided in the front-end | tip of each set for the two electric wires 12 as one set. Further, the tip of the fuel cell wiring 10 has a stepped shape as shown in the drawing so that two wires 12 form a set and the lengths are different in order from the end. In addition, a cut is provided in a part of the base film 11 and the cover film 13 in the vicinity of the center between each pair so that the ends of each pair can be bent independently with the two electric wires 12 as one set. . In the vicinity of the end of this notch, the front ends of each set can be bent together with the base film 11 and the cover film 13 (two-dot chain line portion in FIG. 4). An interval L between the portions to be bent (equal to the interval in the longitudinal direction between adjacent temperature sensors 14) L is set to correspond to the interval between the gaps between the separators 20 in the fuel cell.

  In the fuel cell wiring 10 configured as described above, the distal end portion of the pair of the longest electric wires 12 is bent together with the base film 11 and the cover film 13, and this distal end portion is one end side of the fuel cell (see FIG. 5, 6 (lower side) is inserted into the gap between the pair of separators 20. The leading end of the next set of long wires 12 is also bent in the same manner, and the leading end is inserted between the adjacent separators 20 between the separators 20. In this manner, the respective leading end portions are inserted between the different separator 20 gaps, and the respective leading end portions are inserted between all the separator 20 gaps.

  However, the tip portion may be inserted into the gap between the separators 20 in the process of assembling the fuel cell, when the separator 20 is stacked, the tip portion may be inserted in advance, or after the fuel cell is assembled. , You may make it plug.

  In this way, the respective leading end portions are inserted into the gaps between the separators 20, whereby the elastic member 15 provided at each leading end portion comes into contact with one of the pair of separators 20. Thereby, the other side of the cover film 13 opposite to the elastic member 15 is pressed against the other separator 20 by the elastic repulsive force of the elastic member 15. Thereby, each front-end | tip part is hold | maintained at the clearance gap between a pair of separators 20, and the temperature sensor 14 is positioned.

  The end of the fuel cell wiring 10 opposite to the end where the temperature sensors 14 are provided is bent at the other end of the fuel cell (upper side in FIGS. 5 and 6). A control circuit board 17 (in this embodiment, a control circuit board for detecting the temperature of each part) is provided at the end on this side. This control circuit board 17 is installed on the separator 20 on the other end side of the fuel cell as shown in FIGS. In addition, the area | region where the front-end | tip of the electric wire 12 is attached is restricted to the fixed range (range shown by T in FIG. 4) of the edge part of the separator 20. FIG.

<Effect obtained by the fuel cell wiring according to the present embodiment>
According to the fuel cell wiring 10 according to the present embodiment, the temperature sensor 14 can be positioned in the gap between the separators 20 simply by inserting each tip portion provided with the temperature sensor 14 into the gap between the separators 20. . And since the front-end | tip part is hold | maintained between the separator 20 gap | intervals by the elastic member 15, it can suppress that a front-end | tip part falls out from the clearance gap between the separators 20. FIG. In addition, the temperature sensor 14 can be disposed between the gaps of the plurality of separators 20 by the single fuel cell wiring 10. Therefore, the workability is much better than when a plurality of independent electric wires are attached to each separator. Further, since the flexible planar fuel cell wiring 10 can be installed along the outer wall surface of the fuel cell, the installation space for the fuel cell wiring 10 can be reduced. Further, since the temperature sensor 14 is installed outside the sealed region formed by the gasket 50, it is not necessary to insert the fuel cell wiring 10 into the sealed region, and adverse effects on the sealing performance can be suppressed. In particular, if the elastic repulsive force by the elastic member 15 is set to be smaller than the elastic repulsive force by the gasket 50, the adverse effect on the sealing performance can be more reliably suppressed. In general, it is often difficult to increase the dimensional accuracy of the gap between the separators in the fuel cell. However, according to this embodiment, the fuel cell wiring 10 itself is flexible, and fine adjustment of the bent portion of the tip portion allows each tip to be appropriately inserted in each gap even if the dimensional accuracy is not high. Part can be inserted.

  FIG. 7 shows a second embodiment of the present invention. In this embodiment, various specific examples of the shape of the elastic member will be described. The shape of the elastic member described above is mainly due to the workability when inserting the tip provided with the sensor and the elastic member into the gap between the pair of separators, and the stability of the installed state of the tip after insertion. It can be appropriately selected from the viewpoint. A specific example is shown in FIG. FIG. 7 is an external view showing a shape example of the elastic member according to the second embodiment of the present invention. 7A, 7B, and 7C are external views as viewed from the side, and FIGS. 7D and 7E are external views as viewed from the front. In FIG. 7, the main part of the fuel cell wiring (base film, cover film, electric wire, sensor) excluding the elastic member is shown in a simplified manner.

  The elastic member 15a shown in (a) has a shape obtained by cutting a cylinder so as to pass through the center of the shaft (a shape having a semicircular side surface). The elastic member 15b shown in (b) has a rectangular parallelepiped portion, and has a shape in which a side portion shown in (a) above has a semicircular portion in the vicinity of the center in the longitudinal direction of the rectangular parallelepiped portion. The elastic member 15c shown in (c) has a shape in which an inclined surface that gradually increases in thickness from the tip is provided at the tip. The elastic member 15d shown in (d) has a rectangular parallelepiped portion, and a hemispherical protrusion portion is provided near the center in the width direction of the rectangular parallelepiped portion. The elastic member 15e shown in (e) has a rectangular parallelepiped shape as a whole. In addition, the dotted line provided in each figure has shown the position of the interference. That is, the distance from the upper surface to this dotted line corresponds to the gap between the pair of separators 20.

  Here, after assembling the fuel cell, when inserting each tip portion provided with the temperature sensor 14 in the fuel cell wiring 10 into the gap between the separators 20, a flat slope is formed at the tip of the elastic member 15. It is preferable to provide a surface (an example shown in FIG. 7C) or a curved surface (including a spherical surface) (an example shown in FIGS. 7A, 7B, and 7D). By providing such an inclined surface, each tip portion provided with the temperature sensor 14 in the fuel cell wiring 10 is guided to an appropriate position in the gap between the separators 20, so that insertion workability is improved. In addition, when it is necessary to place importance on the stability of the installation state after the tip portion is inserted, a type with a flat bottom surface is desirable as shown in FIG. However, the above points assume that the upper surface on the separator 20 side is simply planar. Accordingly, it goes without saying that the situation is somewhat different when special measures are taken to insert each tip portion provided with the temperature sensor 14 in the fuel cell wiring 10 on the separator 20 side. For example, even in the type shown in FIG. 7D, if the separator 20 side is provided with a groove or the like corresponding to the hemispherical protrusion of the elastic member 15d, the stability of the installed state after insertion is sufficient. Secured.

FIG. 8 shows a third embodiment of the present invention. In this embodiment, a mechanism in which the elastic member is locked to the separator so that the tip end portion where the sensor and the elastic member are provided is inserted into the gap between the pair of separators and the tip end portion does not fall out of the gap. An example provided with
FIG. 8 is a schematic cross-sectional view showing a state where the elastic member and the separator according to the third embodiment of the present invention are locked. In addition, in FIG. 8, the main-body part (a base film, a cover film, an electric wire, a sensor) of the wiring for fuel cells except an elastic member is simplified and shown collectively.

  The overall shape of the elastic member 15f according to the present embodiment is approximately a rectangular parallelepiped. And the flat inclined surface (C surface) is provided in the front end side so that thickness may become thick gradually. On the other hand, the rear end side is not provided with an inclined surface but is an edge.

  On the other hand, the separator 21 according to the present embodiment is provided with a step portion 22 at the end thereof. Thereby, after the tip portion where the temperature sensor 14 and the elastic member 15f are provided in the fuel cell wiring 10 is inserted into the gap between the separators 21, even if a force acts on the tip portion in the pulling direction, The edge part (locking part) of the rear end part of the elastic member 15 f is caught by the step part 22. Therefore, the tip portion is prevented from falling off.

  FIG. 9 shows a fourth embodiment of the present invention. In this embodiment, a configuration is shown in which the elastic member is characterized so that the tip provided with the sensor and the elastic member can be inserted into the gap between the pair of separators using a jig. FIG. 9 is a schematic diagram illustrating a state where the elastic member according to the fourth embodiment of the present invention is fitted into a jig. However, FIGS. 9A and 9C are schematic diagrams viewed from the front side, and FIGS. 9B and 9D are schematic diagrams viewed from the side surface side. In FIG. 9, the main part (base film, cover film, electric wire, sensor) of the wiring for the fuel cell excluding the elastic member is shown in a simplified manner.

  As described above, the tip portion where the sensor and the elastic member are provided is inserted between the separators in a state where the electric wire 12 is bent together with the base film 11 and the cover film 13. However, the base film 11 and the cover film 13 made of a resin material are generally difficult to be bent. As described above, if the reinforcing member 16 is provided, it is easy to bend the crease to some extent, but it may still be insufficient.

  If the bending wrinkle is difficult to stick, the tip end portion tends to return to the original state, which may hinder the operation of inserting the tip end portion into the gap between the separators. Therefore, a jig (a jig having a U-shaped portion at the tip) including a portion that sandwiches the elastic member portion from both sides and a portion that supports the elastic member from below so that the tip portion does not return to its original state. Thus, it is preferable to insert the tip portion into the gap between the separators.

  In the example shown in FIGS. 9A and 9B, the shape of the elastic member 15g is a portion having the same width as the width of the temperature sensor 14 (actually, the width of the base film 11 is equal) and a width wider than that. The shape has a narrow portion. And the said front-end | tip part is inserted in the clearance gap between separators, pinching | interposing the U-shaped part of the jig | tool 61 in the narrow part of the elastic member 15g. Thereby, since this both ends and lower side of this width direction are supported, this tip part is inserted in the crevice between separators, maintaining the state where it bent. Therefore, it is possible to further facilitate the insertion work.

  In the example shown in FIGS. 9C and 9D, the shape of the elastic member 15 h has a shape having only a portion whose width is narrower than the width of the temperature sensor 14. And the said front-end | tip part is inserted in the clearance gap between separators, pinching | interposing the U-shaped part of the jig | tool 62 to the elastic member 15h. Thereby, since this both ends and lower side of this width direction are supported, this tip part is inserted in the crevice between separators, maintaining the state where it bent. Therefore, it is possible to further facilitate the insertion work.

  FIG. 10 shows a fifth embodiment of the present invention. In this embodiment, a configuration in which a reinforcing plate that makes the base film difficult to bend is provided at the tip of the base film is shown. FIG. 10 is a schematic cross-sectional view of a fuel cell wiring according to Embodiment 5 of the present invention. Since the basic configuration is the same as that of the first embodiment, the same reference numeral is given to the same configuration, and the description thereof is omitted as appropriate.

  In this embodiment, the fuel cell wiring 10 a has a reinforcing plate 18 attached to the vicinity of the tip of the base film 11, and an elastic member 15 is provided on the reinforcing plate 18. The reinforcing plate 18 may be made of the same material as the base film 11. Thus, by providing the reinforcing plate 18, the vicinity of the tip can be made difficult to bend. Thereby, the operation | work which inserts the front-end | tip part in which the temperature sensor 14 and the elastic member 15 are provided in the clearance gap between a pair of separators 20 can be made easier.

  The region where the reinforcing plate 18 is provided is preferably a region avoiding the bent portion of the tip portion, and may be provided only on the tip side of the bent portion, or only on the rear end side of the bent portion. Alternatively, it may be provided on both the front end side and the rear end side of the bent portion.

  In addition, since the part except the said front-end | tip part considers workability | operativity and the ease of arrangement | positioning, it is better to bend easily, Therefore It is meaningless to thicken the base film 11 whole thickness. In addition, it is not practical to increase the thickness of only a part of the base film 11 (the part where the reinforcing plate 18 is provided) because of technical difficulties. Of course, if it is not accompanied by technical difficulties, it is also possible to exert the same effect as that provided with the reinforcing plate by increasing the thickness of a part of the base film 11.

(Other)
In each of the embodiments described so far, the case where the elastic member is fixed to the base film has been described. However, the elastic member is separated from the main body of the fuel cell wiring, and the tip portion where the sensor is provided is inserted. After that, an elastic member can be inserted. Further, when the elastic member is a separate member, it is possible to bend the vicinity of the tip portion by inserting the elastic member without bending the vicinity of the tip portion in advance. In this way, as an elastic member, in addition to the elastic member itself such as a rubber or a metal spring, an elastic member attached to a rigid body and exhibiting an elastic function (pressing function) as a whole Applicable. Further, the elastic member can be divided into a part fixed to the base film and a separate part. For example, an elastic body such as rubber may be fixed to the base film, and another rigid body or the like may be inserted separately from the main body.

FIG. 1 is a schematic cross-sectional view showing a state in which a fuel cell wiring according to Embodiment 1 of the present invention is incorporated in a fuel cell. FIG. 2 is a plan view of the fuel cell wiring according to Embodiment 1 of the present invention. FIG. 3 is a schematic cross-sectional view of the fuel cell wiring according to Embodiment 1 of the present invention. FIG. 4 is a plan view of the vicinity of the end of the fuel cell wiring according to the first embodiment of the present invention. FIG. 5 is an external view showing a state in which the fuel cell wiring according to Embodiment 1 of the present invention is incorporated in the fuel cell. FIG. 6 is an external view showing a state in which the fuel cell wiring according to Embodiment 1 of the present invention is incorporated in the fuel cell. FIG. 7 is an external view showing a shape example of the elastic member according to the second embodiment of the present invention. FIG. 8 is a schematic cross-sectional view showing a state where the elastic member and the separator according to the third embodiment of the present invention are locked. FIG. 9 is a schematic diagram illustrating a state where the elastic member according to the fourth embodiment of the present invention is fitted into a jig. FIG. 10 is a schematic cross-sectional view of a fuel cell wiring according to Embodiment 5 of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,10a Fuel cell wiring 11 Base film 12 Electric wire 13 Cover film 14 Temperature sensor 15, 15a, 15b, 15c, 15d, 15e, 15f, 15g, 15h Elastic member 16 Reinforcement member 17 Control circuit board 18 Reinforcement plate 20, 21 Separator 22 Stepped portion 30 Electrolyte membrane 40 Electrode 50 Gasket 61 Jig 62 Jig

Claims (7)

A planar fuel cell wiring having flexibility,
A conductive member provided on a flexible insulating substrate;
A sensor electrically connected to the conductive member;
An elastic member that is inserted into a gap between a pair of separators in a fuel cell and holds a part of the wiring body in the gap by its own elastic repulsion force;
The sensor is disposed in an insulated state with respect to the separator,
A part of the wiring body is held by the elastic member in the outer region so that the tip of the wiring is located in the outer region of the sealed region formed by the gasket provided between the pair of separators. A fuel cell wiring , wherein the sensor inserted between a pair of separators is positioned while maintaining an insulating state with the separators.   2. The fuel cell wiring according to claim 1, wherein an elastic repulsive force of the elastic member is set to be smaller than an elastic repulsive force of the gasket. A plurality of said conductive members and a plurality of said sensors are provided for said insulating substrate,
The distance between the sensors in the longitudinal direction of the wiring is set so as to correspond to the distance between the gaps between the separators,
The insulating substrate is disposed so as to side surface facing the separator provided in the multi-layered, and the tip of each conductive member is bent together with the insulating substrate, said sensor gaps between the different separators The fuel cell wiring according to claim 1, wherein the wiring is inserted together with the elastic member . In a region including at least part of the bent portion of the insulating substrate, to facilitate the habit bending on the insulating substrate, and claim 3, characterized in that the reinforcing member for reinforcing the strength of the insulating substrate is provided The fuel cell wiring described in 1.   The fuel cell wiring according to any one of claims 1 to 4, wherein an inclined surface that assists introduction into a gap between a pair of separators is provided at a tip portion of the elastic member. The fuel cell wiring according to any one of claims 1 to 5, wherein a locking portion that is hooked and locked to a stepped portion of the separator is provided at a rear end portion of the elastic member. . The fuel cell according to any one of claims 1 to 6, wherein a reinforcing plate that makes the insulating substrate difficult to bend is provided in the vicinity of a tip of the insulating substrate that is inserted into a pair of separators. Wiring.

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