JP6136572B2 - Fuel cell stack - Google Patents

Description

  The present invention relates to a fuel cell stack.

  In recent years, fuel cell stacks have attracted attention as a power source with a low environmental load. The fuel cell stack causes a chemical reaction with, for example, supplied hydrogen gas and oxygen gas, and converts the generated chemical energy into electrical energy. In the fuel cell stack, since the substance produced by the chemical reaction is water in principle, there is almost no adverse effect on the global environment.

  By the way, the electric power generated by the fuel cells of the fuel cell stack is supplied from the current cable terminal corresponding to the connector to the outside via, for example, a current collecting plate disposed at the end of the stacked body in which the fuel cells are stacked. (Refer to Patent Document 1).

JP 2010-135118 A

  In the configuration of Patent Document 1, the current cable terminal corresponding to the connector is disposed adjacent to the fastening plate, but is not sufficiently fixed. In such a configuration, there is a risk that the connector electrically connected to the current collector plate is easily removed.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a fuel cell stack that can prevent a connector electrically connected to a current collector plate from being easily removed.

The fuel cell stack according to the present invention that achieves the above object includes a laminate, a current collector plate, an end plate, a fixing member, a connector portion, and an insertion portion. The laminated body is formed by laminating a plurality of fuel battery cells in which a membrane electrode assembly in which an anode and a cathode are joined to both sides of an electrolyte membrane is sandwiched between a pair of separators. The current collector plate is disposed at at least one end of the stacked body in the stacking direction in which the fuel cells are stacked. The end plate is disposed outside the current collector plate in the stacking direction. The fixing member fixes the stacked body and the end plate in the stacking direction. The connector part includes a terminal electrically connected to the current collector plate. The insertion portion is provided on the end plate, and exposes a housing portion having a connector terminal disposed between the current collector plate and the end plate to the outside . Connector portion includes a flange portion extending outward beyond the housing portion and a housing portion having a terminal, in a plan view as viewed from the laminating direction. The fuel cell stack according to the present invention, the insertion portion is sized through a housing portion of the connector portion, and that contains the openings is sized to conceal at least a portion of the flange portion. Here, the end plate abuts at least a part of the base portion of the connector portion, and the connector portion is restrained between the current collector plate and the end plate by fixing the laminate and the end plate by the fixing member. In the base portion of the connector portion, a fastening member for fastening the connector portion to the current collector plate is disposed at a portion hidden by the end plate.

  In the fuel cell stack of the present invention configured as described above, the connector portion includes a housing portion including terminals and a flange portion that extends outward from the housing portion in a plan view as viewed from the stacking direction. Further, the insertion portion of the end plate is formed of an opening having a size that allows the housing portion of the connector portion to pass therethrough and that has a size that hides at least a part of the flange portion. Therefore, according to the fuel cell stack of the present invention, unless the end plate is removed, the connector portion cannot be removed due to interference with the insertion portion of the end plate. That is, it is possible to prevent the connector portion that is electrically connected to the current collector plate from being easily removed.

It is a perspective view which shows the fuel cell stack which concerns on this embodiment. 1 is a perspective view showing a fuel cell stack according to the present embodiment, which is divided into a laminate in which a plurality of fuel cells are stacked, a casing, and a power extraction portion, and a part of the casing is disassembled for each constituent member. It is a perspective view which decomposes | disassembles and shows the fuel cell of the fuel cell stack concerning this embodiment for every structural member. The fuel cell stack according to the present embodiment is divided into a stack in which a plurality of fuel cells are stacked, a part of the casing, and a power extraction part, and a part of the casing and the power extraction part are disassembled for each constituent member. It is a perspective view. 4 corresponds to the application example 1 related to the fuel cell stack shown in FIG. 4, in which a plurality of stacked fuel cells are separated into a part of the casing and a power extraction part, and the part of the casing and the power extraction part are separated for each constituent member. It is a perspective view disassembled and shown. 4 corresponds to the application example 2 related to the fuel cell stack shown in FIG. 4 and is separated into a laminated body in which a plurality of fuel cells are stacked, a part of the casing, a power extraction part and a fastening member, and a part of the casing and the power extraction part It is a perspective view which decomposes | disassembles and shows for every structural member. Corresponding to Application Example 2 related to the fuel cell stack of FIG. 5, a laminate in which a plurality of fuel cells are stacked, a part of the casing, a power extraction part and a fastening member are separated, and a part of the casing and the power extraction part are It is a perspective view which decomposes | disassembles and shows for every structural member. 4 corresponds to the application example 3 related to the fuel cell stack shown in FIG. 4, in which a plurality of stacked fuel cells are separated into a part of a casing and a power extraction unit, and the power extraction unit is disassembled for each component. It is a perspective view. 8 corresponds to the application example 4 related to the fuel cell stack shown in FIG. 8, in which a plurality of fuel cells are stacked, a part of the casing, a power extraction part, and a fastening member are separated, and the power extraction part is disassembled for each component. It is a perspective view shown.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The size and ratio of each member in the drawings are exaggerated for convenience of explanation and may be different from the actual size and ratio.

  First, the configuration of the fuel cell stack 1 will be described with reference to FIGS.

  FIG. 1 is a perspective view showing a fuel cell stack 1. FIG. 2 is a perspective view showing the fuel cell stack 1 separated into a stacked body 2 in which a plurality of fuel cells 10 are stacked, a housing 30 and a power extraction unit 40, and a part of the housing 30 is exploded for each constituent member. It is. FIG. 3 is an exploded perspective view showing the fuel cells 10 of the fuel cell stack 1 for each constituent member. FIG. 4 shows that the fuel cell stack 1 is separated into a laminate 2 in which a plurality of fuel cells 10 are stacked, a part of the casing 30 and the power extraction part 40, and a part of the casing 30 and the power extraction part 40 are components. It is a perspective view exploded and shown for every.

  The fuel cell stack 1 according to this embodiment includes a stacked body 2 in which a plurality of fuel cells 10 are stacked, a sealing member 20 that seals adjacent fuel cells 10, a housing 30 that holds each component, and a fuel cell. A power extraction unit 40 that extracts power from the cell 10 to the outside is provided. Hereinafter, the configuration of the stacked body 2, the sealing member 20, the housing 30, and the power extraction unit 40 provided in the fuel cell stack 1 in which a plurality of fuel cells 10 are stacked will be described in order.

  The stacked body 2 is configured by stacking a plurality of fuel cells 10. The fuel cell 10 generates electric power. As shown in FIG. 3, the fuel cell 10 sandwiches a membrane electrode assembly 11 in which an anode 11b and a cathode 11c are joined to both sides of an electrolyte membrane 11a with a pair of separators (first separator 13 and second separator 14). Configured. The fuel cell 10 includes a membrane electrode assembly 11, a frame body 12, a first separator 13, and a second separator 14. Hereinafter, each member which comprises the fuel cell 10 is demonstrated.

  As shown in FIG. 3, the membrane electrode assembly 11 is formed by joining an anode 11b and a cathode 11c so as to face the electrolyte membrane 11a. The electrolyte membrane 11a is made of, for example, a solid polymer material and is formed in a thin plate shape. As the solid polymer material, for example, a fluorine resin that conducts hydrogen ions and has good electrical conductivity in a wet state is used. The anode 11b is formed by laminating an electrode catalyst layer, a water repellent layer, and a gas diffusion layer, and is formed in a thin plate shape slightly smaller than the electrolyte membrane 11a. The cathode 11c is formed by laminating an electrode catalyst layer, a water repellent layer, and a gas diffusion layer, and is formed in a thin plate shape with the same size as the anode 11b. The electrode catalyst layers of the cathode 11c and the anode 11b include an electrode catalyst in which a catalyst component is supported on a conductive carrier and a polymer electrolyte. The gas diffusion layers of the cathode 11c and the anode 11b are made of, for example, carbon cloth, carbon paper, or carbon felt woven with yarns made of carbon fibers having sufficient gas diffusibility and conductivity. The membrane electrode assembly 11 described above is generally referred to as MEA (membrane electrode assembly).

  As shown in FIG. 3, the frame body 12 holds the outer periphery of the membrane electrode assembly 11. The frame body 12 is made of, for example, an electrically insulating resin, and is integrally formed in a rectangular plate shape with the outer periphery of the membrane electrode assembly 11 held by a holding portion 12g opened inside. The frame 12 has a cathode gas supply port 12a, a cooling fluid supply port 12b, and an anode gas supply port 12c formed as through-holes at one end in the longitudinal direction. The frame 12 has an anode gas discharge port 12d, a cooling fluid discharge port 12e, and a cathode gas discharge port 12f formed as through holes at the other end in the longitudinal direction.

  As shown in FIG. 3, the first separator 13 is joined to one surface side of the frame body 12 that holds the membrane electrode assembly 11. The 1st separator 13 consists of a metal which has an electroconductive material, and is formed in the thin plate shape larger than the anode 11b. The first separator 13 is formed by providing a plurality of concave and convex shapes so as to form a flow path. That is, the first separator 13 is formed by press molding so that a plurality of concave and convex shapes are arranged at regular intervals. The first separator 13 is provided on the anode 11b side of the membrane electrode assembly 11, but may be provided on the cathode 11c side. Of the plurality of concave and convex shapes related to the first separator 13, the region in contact with the anode 11b corresponds to an anode gas flow path for supplying anode gas to the anode 11b. Of the plurality of concavo-convex shapes of the first separator 13, the region not in contact with the anode 11 b corresponds to a cooling water flow path through which cooling water for cooling the fuel cell stack 1 flows.

  As shown in FIG. 3, the second separator 14 includes a terminal portion 14 c that is bonded to the other surface facing one surface of the frame body 12 and protrudes in a direction toward the outside of the membrane electrode assembly 11. The terminal portion 14 c is for inserting a voltage measurement connector (not shown) and measuring the voltage of the electric power generated in the fuel cell 10 of the membrane electrode assembly 11. Similar to the first separator 13, the second separator 14 is made of a metal having a conductive material, and is formed in a thin plate shape larger than the cathode 11c. Similar to the first separator 13, the second separator 14 is formed by providing a plurality of concave and convex shapes so as to form a flow path. In other words, the second separator 14 is formed by press molding so that a plurality of uneven shapes are arranged at regular intervals. The second separator 14 is provided on the cathode 11c side of the membrane electrode assembly 11, but may be provided on the anode 11b side.

  As shown in FIG. 2, the sealing member 20 seals the outer periphery of the frame body 12 of the adjacent fuel cell 10. The sealing member 20 is made of, for example, a thermosetting resin, and is provided in an annular shape with respect to the outer periphery of the frame body 12. Therefore, the sealing member 20 is integrally joined with the plurality of fuel cells 10 in close contact with each other. When the sealing member 20 is formed of a thermosetting resin, phenol resin, epoxy resin, unsaturated polyester, or the like is used. The sealing member 20 may be configured as a thermosetting adhesive.

  As shown in FIGS. 2 and 4, the housing 30 holds the stacked body 2 configured by stacking a plurality of fuel cells 10. The housing 30 includes a pair of insulating plates 31 and 33, a pair of metal plates 32 and 34, an upper plate 35, a lower plate 36, and a pair of side plates 37 and 38. Hereinafter, each member which comprises the housing 30 is demonstrated.

  As shown in FIGS. 2 and 4, the pair of insulating plates 31 and 33 correspond to end plates that are disposed on the outer side in the stacking direction with respect to the current collecting plate 41 of the power extraction unit 40 described later. The pair of insulating plates 31 and 33 insulate the current collecting plate 41 of the power extraction unit 40. The pair of insulating plates 31 and 33 are made of, for example, an insulating resin, and have a shape corresponding to the outer shape of the fuel cell 10. For example, as shown in FIG. 4, the insulating plate 31 houses a part of a power extraction connector 42 of the power extraction unit 40 described later in a concave insertion portion 31 g provided at a position eccentric from the center in the horizontal direction. The insulating plate 31 exposes the terminal 42a of the power extraction connector 42 to the outside from a notch 31h provided at an end portion that is eccentric from the center in the horizontal direction. The pair of insulating plates 31 and 33 correspond to an electrically insulating first plate disposed between the current collecting plate 41 and the power extraction connector 42.

  The pair of insulating plates 31 and 33 are formed in a rectangular plate shape, and cathode gas supply ports 31a and 33a, cooling fluid supply ports 31b and 33b, and anode gas supply ports 31c and 33c are formed at one end in the longitudinal direction. , Each of which is formed by a through hole. In the pair of insulating plates 31 and 33, anode gas discharge ports 31d and 33d, cooling fluid discharge ports 31e and 33e, and cathode gas discharge ports 31f and 33f are formed as through holes at the other end in the longitudinal direction. . As shown in FIG. 3, a plurality of fuel cells 10 are stacked, and current collectors 41 of a power extraction unit 40 are joined to both ends thereof. In this state, the insulating plate 31 is joined to one current collecting plate 41, and the insulating plate 33 is joined to the other current collecting plate 41. That is, the pair of insulating plates 31 and 33 carry the pair of current collecting plates 41 in a state of being biased from both sides.

  As shown in FIGS. 2 and 4, the pair of metal plates 32 and 34 correspond to end plates that are disposed on the outer side in the stacking direction with respect to the current collecting plate 41 of the power extraction unit 40 described later. Instead of the metal plates 32 and 34, an insulating plate made of an insulating material may be provided. The pair of metal plates 32 and 34 carry the pair of insulating plates 31 and 33 from both sides. The pair of metal plates 32 and 34 are made of metal, for example, and are formed in outer shapes corresponding to the shapes of the insulating plates 31 and 33, respectively. For example, as shown in FIG. 4, the metal plate 32 inserts a power extraction connector 42 of a power extraction portion 40 described later into a concave insertion portion 32 g provided at a position eccentric from the center in the horizontal direction. The metal plate 32 exposes the terminal 42a of the power extraction connector 42 to the outside from a notch 32h provided at an end portion that is eccentric from the center in the horizontal direction. The insertion portion 32g of the metal plate 32 is sized to pass a housing portion 42b (to be described later) of the power take-out connector 42 and from an opening having a size not to pass at least a part of a flange portion 42c (to be described later) of the power take-out connector 42. It is composed. The pair of metal plates 32 and 34 correspond to a second plate provided with an insertion portion.

  The pair of metal plates 32 and 34 are formed in a rectangular plate shape, and cathode gas supply ports 32a and 34a, cooling fluid supply ports 32b and 34b, and anode gas supply ports 32c and 34c are formed at one end in the longitudinal direction. , Each of which is formed by a through hole. The metal plates 32 and 34 have anode gas discharge ports 32d and 34d, cooling fluid discharge ports 32e and 34e, and cathode gas discharge ports 32f and 34f formed as through holes at the other end in the longitudinal direction.

  As shown in FIGS. 2 and 4, the upper plate 35 and the lower plate 36 correspond to fixing members that fix the stacked body 2 and the end plates (for example, the pair of metal plates 32 and 34) in the stacking direction. Specifically, the upper plate 35 and the lower plate 36 carry the outer periphery of the plurality of stacked fuel battery cells 10 in a state in which the outer periphery is urged from above and below. The upper plate 35 is made of, for example, metal and is formed in a plate shape. The upper plate 35 includes a rectangular opening 35a. The opening 35a of the upper plate 35 is inserted with the terminal portion 14c of the second separator provided so as to protrude from the frame 12 of the fuel cell 10 in a state where the plurality of fuel cells 10 are stacked. The lower plate 36 of the housing 30 is made of metal, for example, and is formed in a plate shape. Except for the presence or absence of the upper plate 35, the lower plate 36, and the opening 35a, they have the same shape facing each other.

  As shown in FIG. 2, the pair of side plates 37 and 38 correspond to a fixing member that fixes the stacked body 2 and the end plates (for example, the pair of metal plates 32 and 34) in the stacking direction. Specifically, the pair of side plates 37 and 38 carry the outer periphery of the plurality of stacked fuel cells 10 in a state of being biased from the left-right direction. The pair of side plates 37 and 38 are made of metal, for example, and are formed in a plate shape. The pair of side plates 37 and 38 have the same shape facing each other. The pair of metal plates 32 and 34, the upper plate 35, the lower plate 36, and the pair of side plates 37 and 38 are fastened together by bolts or the like (not shown).

  As shown in FIGS. 2 and 4, the power extraction unit 40 extracts power from the plurality of stacked fuel cells 10 to the outside. As shown in FIG. 3, the power extraction unit 40 includes a current collector plate 41 and a pair of power extraction connectors 42 and 43. Hereinafter, each member which comprises the electric power extraction part 40 is demonstrated.

  The current collecting plate 41 is disposed at at least one end of the stacked body 2 in the stacking direction in which the fuel cells 10 are stacked. The current collecting plate 41 is made of, for example, a conductive member that does not allow gas to pass through, such as dense carbon, is formed in a thin plate shape slightly smaller than the anode 11b and the cathode 11c, and has a protrusion at the center. The power extraction connectors 42 and 43 of the power extraction unit 40 correspond to a connector unit including terminals that are electrically connected to the pair of current collector plates 41.

  The power take-out connectors 42 and 43 take, for example, the power collected by the pair of current collecting plates 41 to the outside of the fuel cell stack 1. As shown in FIG. 4, the power take-out connector 42 includes a housing portion 42 b having terminals 42 a in a polygonal base portion 42 d, and a flange portion that extends outward from the housing portion 42 b in a plan view as viewed from the stacking direction. 42c. In addition, the power extraction connector 42 is provided with a recess (not shown) for inserting a protrusion provided on the current collector plate 41.

  According to the fuel cell stack 1 of the present embodiment described above, the following operational effects are obtained.

  In the fuel cell stack 1, the power extraction connector 42 includes a housing part 42b having terminals 42a and a flange part 42c that extends outward from the housing part 42b in a plan view as viewed from the stacking direction. In the fuel cell stack 1 according to the present invention, the insertion portion 32g of the end plate (for example, the metal plate 32) is sized to pass the housing portion 42b of the power extraction connector 42, and at least a part of the flange portion 42c portion is provided. It is characterized by being composed of an opening having a size to hide. The opening includes a cutout shape such as a U-shape in addition to a rectangular window shape.

  According to the fuel cell stack 1 configured as described above, the power extraction connector 42 is removed by interference with the insertion portion 32g of the end plate (for example, the metal plate 32) unless the end plate (for example, the metal plate 32) is removed. I can't. That is, it is possible to prevent the power extraction connector 42 electrically connected to the current collector plate 41 from being easily removed.

  Further, in the fuel cell stack 1, the end plate is provided with an electrically insulating first plate (for example, the insulating plate 31) disposed between the current collecting plate 41 and the power extraction connector 42, and an insertion portion. A configuration including a second plate (for example, a metal plate 32 but may be an insulating plate) may be employed.

  According to the fuel cell stack 1 configured as described above, the power collected by the current collector plate 41 can be taken out to the outside through the power take-out connector 42 with a simple configuration without causing leakage.

  Furthermore, in the fuel cell stack 1, the first plate (for example, the insulating plate 31) can be configured to include a recess 31i into which at least a part of the base portion 42d of the power extraction connector 42 is fitted.

  According to the fuel cell stack 1 configured as described above, the power extraction connector 42 can be held in the recess 31i of the first plate (for example, the insulating plate 31). Therefore, it is possible to prevent the power extraction connector 42 from dropping from the first plate (for example, the insulating plate 31).

  Further, in the fuel cell stack 1, the power extraction connector 42 is used between the first plate (for example, the insulating plate 31) and the second plate (for example, the metal plate 32) using the upper plate 35 or the like of the housing 30. It can be set as the structure which restrains.

  According to the fuel cell stack 1 configured as described above, the power extraction connector 42 can be fastened together using the first plate (for example, the insulating plate 31) and the second plate (for example, the metal plate 32). The method can sufficiently fix the power extraction connector 42 while suppressing the number of parts. Therefore, it is possible to prevent the power extraction connector 42 from dropping from the fuel cell stack 1.

  Next, in the fuel cell stack 1, an application example 1 related to the above-described end plate shown in FIG. 4 will be described with reference to FIG.

  FIG. 5 corresponds to the application example 1 related to the fuel cell stack 1 of FIG. 4. The fuel cell stack 10 is separated into a stacked body 2 in which a plurality of fuel cells 10 are stacked, a part of the casing 50, and the power extraction unit 40. It is a perspective view which decomposes | disassembles and shows a part and electric power extraction part 40 for every component.

  The end plate provided in the housing 50 includes a first plate, a second plate, and a third plate. The first plate is an electrically insulating insulating plate 51 having a plate shape in which the outer shape of the insulating plate 31 described above is simplified and the surface is not provided with irregularities. The insulating plate 51 is disposed between the current collector plate 41 and the metal plate 53. The protrusion of the current collecting plate 41 is inserted through a through hole 51 g provided in the center of the insulating plate 51. The second plate is a metal plate 52 having the same outer shape as the metal plate 32 described above. The metal plate 52 is disposed outside the laminated body 2 with respect to the power extraction connector 42. The third plate has the same external shape as the insulating plate 31 described above, but is made of a conductive metal plate 53 unlike an insulating resin. The metal plate 53 is disposed between the insulating plate 51 and the power extraction connector 42.

  That is, the casing 50 shown in FIG. 5 corresponds to a configuration in which the insulating plate 31 shown in FIG. 4 is replaced with the configuration of the insulating plate 51 and the metal plate 53 and the insulating plate 51 is adjacent to the current collector plate 41. . The housing 50 includes an upper plate 35, a lower plate 36, and a pair of side plates 37 and 38, similarly to the housing 30 shown in FIG. As in the case 30 shown in FIG. 2, the insulating plate 51, the metal plate 52, and the metal plate 53 are configured as a pair so as to be disposed at both ends of the stacked body 2 formed by stacking a plurality of fuel cells 10. doing.

  According to the application example 1 of the fuel cell stack 1 of the present embodiment described above, the following effects are further achieved.

  In the fuel cell stack 1, the end plate includes an insulating plate 51 disposed between the current collecting plate 41 and the power extraction connector 42, a metal plate 52 provided with an insertion portion 52g, and the insulating plate 51 and the metal plate 52. In between, it can be set as the structure containing the metal plate 53 arrange | positioned between the insulating board 51 and the electric power extraction connector 42. FIG.

  According to the application example 1 of the fuel cell stack 1 configured as described above, the current collecting plate 41 is insulated by the insulating plate 51, so that the end plates adjacent to both ends of the power extraction connector 42 are respectively connected to the metal plate 52 and the metal plate. The plate 53 can be used. Therefore, for example, even if the metal plate 52 has an outer shape provided with the insertion portion 52g, it can be formed by pressing a metal that is easy to process. Furthermore, the cooling effect of the fuel cell 10 can be enhanced by the metal plate 52. Moreover, since the insulating plate 51 has a simple plate shape without the insertion portion, it can be easily formed by injection molding or the like.

  Next, in application example 2 in which the fastening member 60 for fastening the power take-out connector 42 shown in FIGS. 4 and 5 described above to the end plate in the fuel cell stack 1 is provided, with reference to FIGS. 6 and 7. explain.

  6 corresponds to the application example 2 in which the fastening member 60 for fastening the power extraction connector 42 shown in FIG. 4 to the end plate is provided in the fuel cell stack 1. FIG. 6 shows a stack 2 in which a plurality of fuel cells 10 are stacked, a part of the casing 30, a power extraction part 40 and a fastening member 60, and a part of the casing 30 and the power extraction part 40 for each component. It is a perspective view disassembled and shown. 7 corresponds to the application example 2 in which the fastening member 60 for fastening the power extraction connector 42 shown in FIG. 5 to the end plate is provided in the fuel cell stack 1. FIG. 7 shows a stack 2 in which a plurality of fuel cells 10 are stacked, a part of the casing 50, a power extraction part 40 and a fastening member 60, and a part of the casing 50 and the power extraction part 40 for each constituent member. It is a perspective view disassembled and shown.

  The fastening member 60 corresponds to, for example, a screw or a press-fit pin. As shown in FIG. 6, the fastening member 60 made of, for example, a screw is inserted into a screw groove 31 j provided in the insertion portion 31 g of the insulating plate 31 through a screw hole 42 e opened in the base portion 42 d of the power extraction connector 42. Screw on. A screw hole 42e opened in the base portion 42d of the power extraction connector 42 is formed in a portion hidden by the metal plate 32 adjacent to the power extraction connector 42. Similarly, as shown in FIG. 7, the fastening member 60 made of, for example, a screw is connected to a screw provided in the insertion portion 53 g of the metal plate 53 through a screw hole 42 e opened in the flange portion 42 c of the power extraction connector 42. Screw into the groove 53j. A screw hole 42e opened in the base portion 42d of the power extraction connector 42 is formed in a portion hidden by the metal plate 52 adjacent to the power extraction connector 42.

  According to the application example 2 in which the fastening member 60 is provided in the fuel cell stack 1 of the present embodiment described above, the following effects are further obtained.

  As shown in FIG. 6, the fuel cell stack 1 includes a fastening member 60 that fastens the power extraction connector 42 to the insulating plate 31 in a portion of the base portion 42 d of the power extraction connector 42 that is hidden by the metal plate 32. It is good also as a structure to arrange. Further, as shown in FIG. 7, the fuel cell stack 1 is a fastening member that fastens the power extraction connector 42 to the metal plate 53 in a portion hidden by the metal plate 52 in the base portion 42 d of the power extraction connector 42. 60 may be arranged.

  According to the application example 2 of the fuel cell stack 1 configured as described above, the power extraction connector 42 can be firmly fastened to the insulating plate 31 using the fastening member 60 as shown in FIG. Similarly, as shown in FIG. 7, the power take-out connector 42 can be firmly fastened to the metal plate 53 using the fastening member 60. Therefore, it is possible to prevent the power extraction connector 42 from dropping from the fuel cell stack 1. Since the screw hole 42e opened in the base portion 42d of the power extraction connector 42 is hidden from the outside, the fastening member 60 is not removed.

  Next, the application example 3 of the end plate shown in FIG. 4 in the fuel cell stack 1 will be described with reference to FIG.

  FIG. 8 corresponds to a configuration in which the insulating plate 31 is removed from the fuel cell stack 1 shown in FIG. 4. The fuel cell stack 1 is separated into a stack 2 in which a plurality of fuel cells 10 are stacked, a part of the casing 70, and a power extraction unit 40. And it is a perspective view which decomposes | disassembles and shows the electric power extraction part 40 for every structural member.

  In the fuel cell stack 1, the insulating plate 71 is in contact with at least a part of the base portion 42 d of the power extraction connector 42. The housing 70 includes an upper plate 35, a lower plate 36, and a pair of side plates 37 and 38, similarly to the housing 30 shown in FIG. Similarly to the casing 30 shown in FIG. 2, the insulating plates 71 are configured as a pair so as to be disposed at both ends of the stacked body 2 formed by stacking a plurality of fuel cells 10. The laminated body 2 and the insulating plate 71 are fixed using the upper plate 35 or the like of the housing 70. Therefore, the power extraction connector 42 is restrained between the current collector plate 44 and the insulating plate 71. The power extraction connector 42 covers an insulating material on the surface that contacts the current collector plate 44. The current collector plate 44 is thicker than the current collector plate 41 described above.

  According to the application example 3 which concerns on the end plate of the fuel cell stack 1 of this embodiment mentioned above, there exist the following effects further.

  In the fuel cell stack 1, the insulating plate 71 contacts at least a part of the base portion 42 d of the power extraction connector 42, and the laminated body 2 and the insulating plate 71 are fixed using the upper plate 35 or the like of the housing 70, The power extraction connector 42 is restrained between the current collector plate 44 and the insulating plate 71.

  According to the fuel cell stack 1 configured as described above, even with a simple configuration in which the insulating plate 31 corresponding to the end plate is omitted, the insulating plate 71 has insulating properties. The same effect as the fuel cell stack 1 shown can be obtained. Furthermore, according to the fuel cell stack 1, the power extraction connector 42 can be restrained and held between the current collector plate 44 and the insulating plate 71. Therefore, it is possible to prevent the power extraction connector 42 from dropping from the fuel cell stack 1.

  Next, in application example 4 in which the power extraction connector 42 is fastened to the current collector plate 44 using the fastening member 60 in the configuration of the fuel cell stack 1 shown in FIG. While explaining.

  FIG. 9 corresponds to a configuration in which the power take-out connector 42 shown in FIG. 8 is fastened by the fastening member 60 in the fuel cell stack 1, and a stacked body 2 in which a plurality of fuel battery cells 10 are stacked, a part of the casing 70, and the power take-out. It is a perspective view which isolate | separates into the part 40 and the fastening member 60, and decomposes | disassembles and shows the electric power extraction part 40 for every structural member.

  The fastening member 60 is screwed into a screw groove 44 a provided in the current collector plate 44 through a screw hole 42 e opened in the base portion 42 d of the power extraction connector 42. The current collector plate 44 is thicker than the current collector plate 41 described above in order to form the screw groove 44a.

  According to the application example 4 in which the fastening member 60 is provided in the fuel cell stack 1 of the present embodiment described above, the following effects are further obtained.

  In the fuel cell stack 1, a fastening member 60 that fastens the power extraction connector 42 to the current collector plate 44 is disposed in a portion of the base portion 42 d of the power extraction connector 42 that is hidden by the end plate.

  According to the fuel cell stack 1 configured as described above, the power extraction connector 42 can be firmly fastened to the current collector plate 44 using the fastening member 60. Therefore, it is possible to prevent the power extraction connector 42 from dropping from the fuel cell stack 1. Since the screw hole 42e opened in the base portion 42d of the power extraction connector 42 is hidden from the outside by the insulating plate 71 of the housing 70, the fastening member 60 is not removed.

  In addition, the present invention can be variously modified based on the configurations described in the claims, and these are also within the scope of the present invention. For example, the metal plate may be replaced with an insulating plate.

1 Fuel cell stack,
2 laminates,
10 Fuel cell,
11 Membrane electrode assembly,
11a electrolyte membrane,
11b anode,
11c cathode,
12 frame,
13 first separator,
14 second separator,
20 sealing member,
30 box,
31 Insulating plate,
31g insertion part,
31h Notch,
31i recess,
31j thread groove,
32, 34 metal plate,
32g insertion part,
32h Notch,
31, 33 insulating plate,
35 Upper plate,
35a opening,
36 Lower plate,
37 side plates,
40 Electricity extraction section,
41, 44 current collector plate,
42, 43 power outlet connector,
42a terminal,
42b housing part,
42c flange part,
42d base part,
42e screw holes,
44a thread groove,
50,70 housing,
51, 71 insulating plate,
51g through hole,
52, 53 metal plate,
52g, 53g insertion part,
53i recess,
53j thread groove,
60 Fastening member.

Claims (6)

A laminate in which a plurality of fuel cells each having a membrane electrode assembly in which an anode and a cathode are joined to both sides of an electrolyte membrane are sandwiched by a pair of separators;
A current collector plate disposed at at least one end of the stack in the stacking direction in which the fuel cells are stacked;
An end plate disposed outside the current collecting plate in the stacking direction;
A fixing member for fixing the said end plate and the laminate in the stacking direction,
A connector portion comprising a terminal electrically connected to the current collector plate;
An insertion part that is provided on the end plate and faces a housing part including the terminal of the connector part disposed between the current collector plate and the end plate;
The connector portion includes said housing portion comprising said terminal, and a flange portion extending outward from the housing portion in a plan view as viewed from the stacking direction,
The insertion portion is a size passing the housing portion of the connector portion, and Ri Na consist is sized opening to conceal at least a portion of said flange portion,
The end plate abuts at least a part of the base portion of the connector portion, and the connector and the end plate are connected to each other by fixing the laminate and the end plate by the fixing member. Bound between
A fuel cell stack , wherein a fastening member for fastening the connector portion to the current collector plate is disposed in a portion of the base portion of the connector portion that is hidden by the end plate .   The end plate includes an electrically insulating first plate disposed between the current collector plate and the connector portion, and a second plate provided with the insertion portion. The fuel cell stack described in 1.   The end plate includes an electrically insulating first plate disposed between the current collector plate and the connector portion, a second plate provided with the insertion portion, the first plate, The fuel cell stack according to claim 1, further comprising a third plate disposed between the first plate and the connector portion between the second plates. 4. The fuel cell stack according to claim 3 , wherein the first plate or the third plate of the end plate includes a recess into which at least a part of the base portion of the connector portion is fitted. The second plate in the end plate abuts on at least a part of the base portion in the connector portion, and by fixing the stacked body and the second plate in the end plate by the fixing member, The fuel cell stack according to claim 3 , wherein the connector portion is restrained between the first plate or the third plate and the second plate. Fastening that fastens the connector portion to the first plate or the third plate of the end plate at a portion of the base portion of the connector portion that is hidden by the second plate of the end plate. The fuel cell stack according to claim 3 , wherein the member is disposed.