JP2007207707A - Fuel cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel cell stack in which reduction of a sealing property due to deformation of a sealing member in an inclined direction from a load direction is controlled, when a tightening load is added in a lamination direction of a stack structure. <P>SOLUTION: In a seal-gasket integrated type membrane electrode assembly (MEGA451) in which a frame 450 is formed integrally around the MEGA451, a cathode-side sealing part 458a and an anode-side sealing part 458b are formed on both sides of the frame 450 at positions each separated in a predetermined distance. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fuel cell, and more particularly to a fuel cell having a stack structure in which a plurality of laminated bodies each having an anode and a cathode disposed on both surfaces of a predetermined electrolyte membrane are laminated with a separator interposed therebetween. It is.

  A fuel cell that generates electricity by an electrochemical reaction between hydrogen and oxygen has attracted attention as an energy source. Some of the fuel cells have a stack structure in which membrane electrode assemblies and separators each having an anode (hydrogen electrode) and a cathode (oxygen electrode) disposed on both sides of a predetermined electrolyte membrane are alternately stacked. (Hereinafter, a fuel cell having such a stack structure is also referred to as a fuel cell stack).

  With respect to such a fuel cell stack, conventionally, various techniques for preventing leakage of reaction gas (fuel gas and oxidant gas) have been proposed. For example, Patent Document 1 below describes a configuration in which a membrane electrode assembly and an elastic packing member are integrated in a fuel cell stack. In the fuel cell stack having such a configuration, generally, the elastic packing members are provided on both surfaces of the electrolyte membrane so that the positions of the center lines substantially coincide (see the upper part of FIG. 8A). In order to obtain the sealing property of the elastic packing member, a fastening load is applied in the stacking direction of the fuel cell stack. By doing so, a good sealing property can be obtained (see the lower part of FIG. 8A).

JP 2000-133290 A

  However, for example, when the position of the center line of the elastic packing member on both surfaces of the electrolyte membrane is shifted due to manufacturing variations (see the upper part of FIG. 8B), a fastening load is applied in the stacking direction of the fuel cell stack. When added, the load balance to the elastic packing member may be lost, and the elastic packing member may be deformed obliquely with respect to the load direction (stacking direction) (see the lower part of FIG. 8B). In this case, a desired reaction force cannot be obtained from the elastic packing member, and the sealing performance may be deteriorated.

  The present invention has been made to solve the above-described problem. In a fuel cell stack, when a fastening load is applied in the stacking direction of the stack structure, the seal member (elastic packing member) is in the load direction. It aims at suppressing the fall of the sealing performance by deforming diagonally.

In order to solve at least a part of the above-described problems, the present invention employs the following configuration.
The fuel cell of the present invention comprises
A fuel cell having a stack structure in which a plurality of laminated bodies each having an anode and a cathode disposed on both surfaces of a predetermined electrolyte membrane are laminated with a separator interposed therebetween,
The laminate is integrally provided with a seal member for preventing leakage of a reactive gas supplied to the surface of the laminate on the outer periphery of the laminate,
The seal member includes a first seal portion that protrudes in the stacking direction of the stack structure on both surfaces of the seal member, and abuts against the opposing separator, and a second seal portion,
The gist of the present invention is that the first seal part and the second seal part are formed at positions separated by a predetermined distance when viewed from the stacking direction.

  Here, the “predetermined distance” is a distance set in advance for the purpose of separating the first seal portion and the second seal portion. Therefore, even though the first seal portion and the second seal portion are formed so that the first seal portion and the second seal portion overlap each other when viewed from the stacking direction of the stack structure, It does not include those in which the first seal portion and the second seal portion are separated due to manufacturing variations or errors.

  According to the present invention, when a fastening load is applied in the stacking direction of the fuel cell stack, the fastening load applied to the first seal portion in the seal member is applied to the second seal portion, and the fastening load applied to the second seal portion is the first. It is possible not to add directly to one seal portion. Therefore, even if some manufacturing variations occur at the positions of the first seal portion and the second seal portion, the first seal portion is applied when a fastening load is applied in the stacking direction of the fuel cell stack. And it can suppress that a 2nd seal | sticker part deform | transforms diagonally with respect to a load direction (stacking direction). As a result, a decrease in sealing performance can be suppressed.

In the fuel cell,
The sealing member further includes
On the surface on the opposite side of the first seal part, the first seal part is disposed at a position overlapping the first seal part when viewed from the stacking direction, and comes into contact with the separator, thereby making contact with the first seal part. A first support for supporting a load acting in the stacking direction;
On the surface opposite to the second seal portion, the second seal portion is disposed at a position overlapping with the second seal portion when viewed from the stacking direction, and comes into contact with the separator, thereby making contact with the second seal portion. A second support that supports a load acting in the stacking direction;
You may make it provide.

  By carrying out like this, the load added to the 1st seal part and the 2nd seal part can be effectively supported by the 1st support part and the 2nd support part, respectively.

In the fuel cell,
The first support part and the second support part may be formed integrally with the seal member.

  By doing so, the number of parts at the time of manufacturing the fuel cell can be reduced, and the fuel cell can be easily manufactured.

  In addition, you may make it equip a separator with the thing equivalent to the said 1st support part and a 2nd support part instead of a sealing member.

In any of the above fuel cells,
The separator is
A flat anode facing plate facing the anode of the laminate;
A plate-like cathode facing plate facing the cathode of the laminate;
An intermediate plate sandwiched between the anode facing plate and the cathode facing plate;
You may make it provide.

  The present invention can be configured as an invention of a fuel cell system including the fuel cell, in addition to the configuration as the fuel cell described above.

Hereinafter, embodiments of the present invention will be described in the following order based on examples.
A. Fuel cell stack configuration:
B. Fuel cell module:
B1. Separator:
B2. MEGA with integrated seal gasket:
C. Variation:

A. Fuel cell stack configuration:
FIG. 1 is a perspective view showing a schematic configuration of a fuel cell stack 100 as an embodiment of the present invention. The fuel cell stack 100 has a stack structure in which a plurality of cells that generate power by an electrochemical reaction between hydrogen and oxygen are stacked with a separator interposed therebetween. As will be described later, each cell has a configuration in which an anode and a cathode are arranged with an electrolyte membrane having proton conductivity interposed therebetween. In this example, a solid polymer membrane was used as the electrolyte membrane. Another electrolyte such as a solid oxide may be used as the electrolyte. Note that the number of stacked cells can be arbitrarily set according to the output required for the fuel cell stack 100.

  The fuel cell stack 100 is configured by stacking an end plate 10, an insulating plate 20, a current collecting plate 30, a plurality of fuel cell modules 40, a current collecting plate 50, an insulating plate 60, and an end plate 70 in this order from one end. Yes. These are provided with a supply port, a discharge port, and a flow path (not shown) for flowing hydrogen as a fuel gas, air as an oxidant gas, and cooling water in the fuel cell stack 100. Hydrogen is supplied from a hydrogen tank (not shown). Air and cooling water are pressurized and supplied by a pump (not shown). The fuel cell module 40 is constituted by a separator 41 described later, a membrane electrode assembly, and a seal gasket-integrated MEGA 45 integrally including a gasket. The fuel cell module 40 will be described later.

  The fuel cell stack 100 is also provided with a tension plate 80 as shown. In the fuel cell stack 100, in order to suppress a decrease in battery performance due to an increase in contact resistance or the like in any part of the stack structure, and to obtain sufficient sealing performance of the seal gasket-integrated MEGA 45, the stack structure stack A pressing force is applied in the direction, and the tension plate 80 is fixed to the end plates 10 and 70 at both ends of the fuel cell stack 100 by bolts 82, whereby each fuel cell module 40 is fastened with a predetermined fastening force in the stacking direction. ing.

  Note that the end plates 10 and 70 and the tension plate 80 are made of metal such as steel in order to ensure rigidity. The insulating plates 20 and 60 are formed of an insulating member such as rubber or resin. The current collecting plates 30 and 50 are formed of dense carbon or a gas impermeable conductive member such as a copper plate. The current collector plates 30 and 50 are each provided with an output terminal (not shown) so that the power generated by the fuel cell stack 100 can be output.

B. Fuel cell module:
As described above, the fuel cell module 40 includes the separator 41 and the seal gasket-integrated MEGA 45. Hereinafter, the separator 41 and the seal gasket-integrated MEGA 45 will be described.

B1. Separator:
FIG. 2 is a plan view of the component parts of the separator 41 and the separator 41. The separator 41 in this embodiment is composed of three metal flat plates each provided with a plurality of through holes, that is, a cathode facing plate 42, an intermediate plate 43, and an anode facing plate 44. The separator 41 is manufactured by superimposing the cathode facing plate 42, the intermediate plate 43, and the anode facing plate 44 in this order and performing hot press bonding. In this embodiment, the cathode facing plate 42, the intermediate plate 43, and the anode facing plate 44 are made of stainless steel flat plates having the same rectangular shape. As the cathode facing plate 42, the intermediate plate 43, and the anode facing plate 44, flat plates made of other metals such as titanium or aluminum may be used instead of stainless steel. Further, as the intermediate plate 43, a resin plate may be used.

  FIG. 2A is a plan view of the cathode facing plate 42 that comes into contact with the surface on the cathode side of the seal gasket-integrated MEGA 45. As illustrated, the cathode facing plate 42 includes an air supply through hole 422a, a plurality of air supply ports 422i, a plurality of air discharge ports 422o, an air discharge through hole 422b, and a hydrogen supply through hole 424a. , A hydrogen discharge through hole 424b, a cooling water supply through hole 426a, and a cooling water discharge through hole 426b are provided. In this embodiment, the air supply through hole 422a, the air discharge through hole 422b, the hydrogen supply through hole 424a, the hydrogen discharge through hole 424b, the cooling water supply through hole 426a, and the cooling water discharge The through hole 426b is substantially rectangular, and the plurality of air supply ports 422i and the plurality of air discharge ports 422o are circular with the same diameter.

  FIG. 2B is a plan view of the anode facing plate 44 that comes into contact with the anode side surface of the seal gasket-integrated MEGA 45. As illustrated, the anode facing plate 44 includes an air supply through hole 442a, an air discharge through hole 442b, a hydrogen supply through hole 444a, a plurality of hydrogen supply ports 444i, and a plurality of hydrogen discharge ports 444o. , A hydrogen discharge through hole 444b, a cooling water supply through hole 446a, and a cooling water discharge through hole 446b are provided. In this embodiment, the air supply through hole 442a, the air discharge through hole 442b, the hydrogen supply through hole 444a, the hydrogen discharge through hole 444b, the cooling water supply through hole 446a, and the cooling water discharge The through hole 446b is substantially rectangular, and the plurality of hydrogen supply ports 444i and the plurality of hydrogen discharge ports 444o are circular with the same diameter.

  FIG. 2C is a plan view of the intermediate plate 43. As shown in the figure, the intermediate plate 43 includes an air supply through hole 432a, an air discharge through hole 432b, a hydrogen supply through hole 434a, a hydrogen discharge through hole 434b, and a plurality of cooling water flow path forming through holes. Hole 436. The air supply through hole 432a is provided with a plurality of air supply flow path forming portions 432c for flowing air from the air supply through hole 432a to the plurality of air supply ports 422i of the cathode facing plate 42, respectively. ing. The air discharge through hole 432b is provided with a plurality of air discharge flow path forming portions 432d for flowing air from the plurality of air discharge ports 422o of the cathode facing plate 42 to the air discharge through hole 432b. . The hydrogen supply through hole 434a is provided with a plurality of hydrogen supply flow path forming portions 432e for flowing hydrogen from the hydrogen supply through hole 434a to the plurality of hydrogen supply ports 444i of the anode facing plate 44, respectively. ing. The hydrogen discharge through hole 434b is provided with a plurality of hydrogen discharge flow path forming portions 432f for flowing hydrogen from the plurality of hydrogen discharge ports 444o of the anode facing plate 44 to the hydrogen discharge through hole 434b. .

  FIG. 2D is a plan view of the separator 41. Here, the top view seen from the anode opposing plate 44 side was shown.

  As can be seen from the figure, in the anode facing plate 44, the intermediate plate 43, and the cathode facing plate 42, the air supply through hole 442a, the air supply through hole 432a, and the air supply through hole 422a are the same. Formed in position. The air discharge through hole 442b, the air discharge through hole 432b, and the air discharge through hole 422b are also formed at the same position. Further, the hydrogen supply through-hole 444a, the hydrogen supply through-hole 434a, and the hydrogen supply through-hole 424a are also formed at the same position. Further, the hydrogen discharge through hole 444b, the hydrogen discharge through hole 434b, and the hydrogen discharge through hole 424b are also formed at the same position.

  Further, in the anode facing plate 44 and the cathode facing plate 42, the cooling water supply through-hole 446a and the cooling water supply through-hole 426a are formed at the same position. The cooling water discharge through-hole 446b and the cooling water discharge through-hole 426b are also formed at the same position.

  In addition, in the intermediate plate 43, one end of each of the plurality of cooling water flow path forming through holes 436 has a cooling water supply through hole 446 a in the anode facing plate 44 and a cooling water supply through hole in the cathode facing plate 42. While overlapping with the hole 426 a, the other end is formed so as to overlap with the cooling water discharge through hole 446 b of the anode facing plate 44 and the cooling water discharge through hole 426 b of the cathode facing plate 42.

  The widths of the air supply flow path forming part 432c, the air discharge flow path forming part 432d, the hydrogen supply flow path forming part 432e, and the hydrogen discharge flow path forming part 432f in the intermediate plate 43 are respectively the cathode facing plate. The diameters of the air supply port 422i, the air discharge port 422o, and the hydrogen supply port 444i and the hydrogen discharge port 444o of the anode facing plate 44 are set larger. By doing so, when the cathode facing plate 42, the intermediate plate 43, and the anode facing plate 44 are joined together by being overlapped, even if they are slightly displaced, air and hydrogen can be flowed in a desired path. .

  In this separator 41, the flow of hydrogen, air, and cooling water is as follows. That is, the hydrogen flowing through the hydrogen supply through hole 424 a of the cathode facing plate 42, the hydrogen supply through hole 434 a of the intermediate plate 43, and the hydrogen supply through hole 444 a of the anode facing plate 44 Branches from 434a, passes through a plurality of hydrogen supply flow path forming portions 432e, and is perpendicular to the anode of the MEGA portion 451 of the seal gasket-integrated MEGA 45 described later from the plurality of hydrogen supply ports 444i of the anode facing plate 44. Supplied in the direction. Then, the anode off gas discharged from the anode is discharged through the plurality of 444o of the anode facing plate 44 and the hydrogen discharge flow path forming portion 432f of the intermediate plate 43.

  The air flowing through the air supply through-hole 442a of the anode facing plate 44, the air supply through-hole 432a of the intermediate plate 43, and the air supply through-hole 422a of the cathode facing plate 42 are passed through the air supply through-hole of the intermediate plate 43. Branches from 432a, passes through the air supply flow path forming part 432c, and passes through a plurality of air supply ports 422i of the cathode facing plate 42 in a direction perpendicular to the cathode of the MEGA part 451 of the seal gasket-integrated MEGA 45 described later. Supplied. The cathode off-gas discharged from the cathode is discharged through a plurality of air discharge ports 422o of the cathode facing plate 42 and 432d of the intermediate plate 43.

  Further, the cooling water flowing through the cooling water supply through hole 446a of the anode facing plate 44, one end of the plurality of cooling water flow path forming through holes 436 of the intermediate plate 43, and the cooling water supply through hole 426a of the cathode facing plate 42 are: It branches from the cooling water flow path forming through hole 436 of the intermediate plate 43, passes through the intermediate plate 43, and is discharged from the other end of the cooling water flow path forming through hole 436.

B2. MEGA with integrated seal gasket:
3 and 4 are explanatory views showing a seal gasket-integrated MEGA 45. FIG. FIG. 3 shows a plan view of the seal gasket-integrated MEGA 45 as viewed from the cathode side. FIG. 4 is a plan view of the seal gasket-integrated MEGA 45 as viewed from the anode side. The external shape of the seal gasket-integrated MEGA 45 is the same as the external shape of the separator 41.

  As shown in the drawing, the seal gasket-integrated MEGA 45 is obtained by supporting a periphery of a MEGA portion 451 described later by a frame 450. In this embodiment, silicone rubber is used as the frame 450. However, the present invention is not limited to this, and other members having gas impermeability, elasticity, and heat resistance may be used.

  Although not shown, the MEGA unit 451 has a cathode catalyst layer and a cathode diffusion layer laminated in this order on one (cathode side) surface of the electrolyte membrane, and an anode (on the anode side) surface on the anode side. This is a membrane electrode assembly in which a catalyst layer for anode and a diffusion layer for anode are laminated in this order. In this example, a metal porous body was used as the anode diffusion layer and the cathode diffusion layer. By doing so, the gas can be efficiently diffused and supplied to the entire surfaces of the anode and the cathode. As the anode diffusion layer and the cathode diffusion layer, other members having conductivity and gas diffusibility such as carbon may be used instead of the metal porous body.

  As shown in the figure, the frame 450 has an air supply through-hole 452a, a hydrogen supply through-hole 454a, an air discharge through-hole 452b, a hydrogen discharge through-hole 454b, and cooling water, as shown in the figure. A supply through-hole 456a and a cooling water discharge through-hole 456b are formed. A seal portion and a support portion are integrally formed around each of the through holes and the MEGA portion 451, respectively. The seal part and the support part will be described later.

  Specifically, as shown in FIG. 3, a seal portion (cathode side seal portion) 458 a is provided on the cathode side surface of the seal gasket-integrated MEGA 45 around each of the through holes and the MEGA portion 451. Further, a support portion (cathode side support portion) 459a is provided around the periphery. When the seal gasket-integrated MEGA 45 and the separator 41 are laminated, the cathode side seal portion 458a contacts the separator 41 to form a seal line (cathode side seal line) on the cathode side surface of the frame 450. Further, as shown in FIG. 4, support portions (anode side support portions) 459 b are provided on the anode side surface of the seal gasket-integrated MEGA 45 around the through holes and the MEGA portion 451. Further, a seal portion (anode side seal portion) 458b is provided around the periphery. When the seal gasket-integrated MEGA 45 and the separator 41 are laminated, the anode side seal portion 458b contacts the separator 41 and forms a seal line (anode side seal line) on the anode side surface of the frame 450. That is, the frame 450 functions as a gasket for preventing leakage of hydrogen, oxygen, and cooling water.

  5 is a cross-sectional view taken along line AA in FIG. FIG. 5A shows a cross-sectional view of the MEGA 45 integrated with a seal gasket. FIG. 5B shows a state where the seal gasket-integrated MEGA 45 and the separator 41 are stacked and a fastening load is applied in the stacking direction.

  As shown in FIG. 5A, in this embodiment, the cathode-side seal portion 458a and the anode-side seal portion 458b have a semicircular cross-sectional shape, and the cathode-side support portion 459a and the anode-side support. The cross-sectional shape of the portion 459b is a rectangle. And the central axis of the cathode side seal part 458a and the central axis of the anode side seal part 458b are shifted. That is, the cathode side seal portion 458a and the anode side seal portion 458b are formed such that the cathode side seal line and the anode side seal line are arranged at different positions. The central axis of the cathode side seal portion 458a and the central axis of the anode side support portion 459b coincide with each other, and the central axis of the anode side seal portion 458b and the central axis of the anode side support portion 459b are Are consistent with each other.

  In addition, the height of the cathode side seal part 458a and the anode side seal part 458b is the same. The heights of the cathode side support portion 459a and the anode side support portion 459b are the same. Further, the height h1 of the cathode side seal part 458a and the anode side seal part 458b is higher than the height of the cathode side support part 459a and the anode side support part 459b. These heights can be arbitrarily set. When the sealing gasket-integrated MEGA 45 and the separator 41 are stacked and a fastening load is applied in the stacking direction, the cathode side seal portion 458a and the anode side seal portion It is set so that a desired reaction force can be obtained from 458b.

  Further, as shown in FIG. 5B, the anode side support portion 459 b supports the load acting in the stacking direction on the cathode side seal portion 458 a by contacting the separator 41. Further, the cathode side support portion 459a supports the load acting in the stacking direction on the anode side seal portion 458b by contacting the separator 41.

  According to the fuel cell stack 100 of the present embodiment described above, in the seal gasket-integrated MEGA 45, the cathode side seal portion 458a and the anode side seal portion 458b are divided into a cathode side seal line and an anode side seal line. Since they are formed at a predetermined distance so as to be arranged at different positions, when a fastening load is applied in the stacking direction of the fuel cell stack 100, the cathode side seal portion 458a in the seal gasket-integrated MEGA 45, The fastening load applied to the anode side seal portion 458b can be prevented from being directly applied to the anode side seal portion 458b and the cathode side seal portion 458a, respectively. Therefore, even if some manufacturing variations occur at the positions of the cathode side seal portion 458a and the anode side seal portion 458b, when the fastening load is applied in the stacking direction of the fuel cell stack 100, the cathode side seal portion It can suppress that 458a and the anode side seal | sticker part 458b deform | transform diagonally with respect to a load direction (lamination direction). As a result, a decrease in sealing performance can be suppressed.

C. Variation:
Although the embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and can be implemented in various modes without departing from the scope of the present invention. For example, the following modifications are possible.

C1. Modification 1:
In the above embodiment, the cross-sectional shapes of the cathode side seal portion 458a and the anode side seal portion 458b are semicircular, but are not limited thereto.

  FIG. 6 is an explanatory view showing a modified cathode side seal portion 458a and anode side seal portion 458b. Here, the AA sectional view in FIG. 4 is shown. FIG. 6A shows an example in which the cross-sectional shapes of the cathode side seal portion 458a and the anode side seal portion 458b are semi-elliptical. FIG. 6B shows an example in which the cross-sectional shapes of the cathode side seal portion 458a and the anode side seal portion 458b are trapezoidal. In addition, although illustration was abbreviate | omitted, the cross-sectional shape of the cathode side support part 459a and the anode side support part 459b is not restricted to a rectangle.

  In the above embodiment, the cathode side support portion 459a and the anode side support portion 459b are formed integrally with the frame 450, but the present invention is not limited to this. As shown in FIG. 6C, for example, the cathode side support portion 459a and the anode side support portion 459b may be manufactured as separate members and joined to the frame 450. However, if the cathode side support portion 459a and the anode side support portion 459b are integrally formed as in the above embodiment, the number of parts at the time of manufacturing the fuel cell stack 100 can be reduced, and the fuel cell stack 100 can be manufactured. There is an advantage that can be easily performed.

C2. Modification 2:
FIG. 7 is a cross-sectional view of a modified separator 41A and seal gasket-integrated MEGA 45A. Here, a sectional view of the same part as the example shown in FIG. 5 is shown. In this modification, the seal gasket-integrated MEGA 45A does not include the cathode side support portion 459a and the anode side support portion 459b. Instead, the separator 41A includes convex portions 41Aa and 41Ab at positions facing the anode side seal portion 458b and the cathode side seal portion 458a of the seal gasket-integrated MEGA 45. Then, as can be seen from the drawing, the convex portions 41Aa and 41Ab have the same functions as the cathode side support portion 459a and the anode side support portion 459b in the above embodiment, respectively. That is, the convex portion 41Aa supports a load acting on the anode-side seal portion 458b in the stacking direction, and the convex portion 41Ab supports a load acting on the cathode-side seal portion 458a in the stacking direction. Also in this manner, as in the above embodiment, when a fastening load is applied in the stacking direction of the fuel cell stack 100, the cathode-side seal portion 458a and the anode-side seal portion 458b are in the load direction (lamination It is possible to suppress the oblique deformation with respect to (direction), and to suppress the deterioration of the sealing performance.

C3. Modification 3:
In the above-described embodiment, the separator is configured by three plates including the cathode facing plate, the intermediate plate, and the anode facing plate, but is not limited thereto. For example, a separator formed by processing one block-like member such as carbon may be used.

1 is a perspective view showing a schematic configuration of a fuel cell stack 100 as one embodiment of the present invention. FIG. 4 is a plan view of components of the separator 41 and the separator 41. It is explanatory drawing which shows the seal gasket integrated MEGA45. It is explanatory drawing which shows the seal gasket integrated MEGA45. It is AA sectional drawing in FIG. It is explanatory drawing which shows the cathode side seal part 458a and the anode side seal part 458b as a modification. It is sectional drawing of separator 41A and seal gasket integrated MEGA45A as a modification. It is explanatory drawing which shows the packing member as a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Fuel cell stack 10, 70 ... End plate 20, 60 ... Insulation plate 30, 50 ... Current collecting plate 40 ... Fuel cell module 41, 41A ... Separator 41Aa, 41Ab. .. Projection 42 ... Cathode facing plate 422a ... Air supply through hole 422b ... Air discharge through hole 422i ... Air supply port 422o ... Air discharge port 424a ... Hydrogen supply Through-hole 424b ... Hydrogen discharge through-hole 426a ... Cooling water supply through-hole 426b ... Cooling-water discharge through-hole 43 ... Intermediate plate 432a ... Air supply through-hole 432b ... Air discharge through hole 432c ... Air supply flow path forming part 432d ... Air discharge flow path forming part 432e ... Hydrogen supply flow path forming part 432f ... Hydrogen discharge flow path forming part 434a ... Hydrogen supply through hole 434b ... Hydrogen discharge through hole 436 ... Cooling water flow path formation Through hole 44 ... Anode facing plate 442a ... Air supply through hole 442b ... Air discharge through hole 444a ... Hydrogen supply through hole 444b ... Hydrogen discharge through hole 444i ... Hydrogen Supply port 444o ... Hydrogen discharge port 446a ... Cooling water supply through hole 446b ... Cooling water discharge through hole 45, 45A ... MEGA with integrated seal gasket
450 ... Frame 451 ... MEGA section 452a ... Air supply through hole 452b ... Air discharge through hole 454a ... Hydrogen supply through hole 454b ... Hydrogen discharge through hole 456a ... .Cooling water supply through hole 456b ... Cooling water discharge through hole 458a ... Cathode side seal portion 458b ... Anode side seal portion 459a ... Cathode side support portion 459b ... Anode side support portion 70 ... End plate 80 ... Tension plate 82 ... Bolt

Claims (4)

A fuel cell having a stack structure in which a plurality of laminated bodies each having an anode and a cathode disposed on both surfaces of a predetermined electrolyte membrane are laminated with a separator interposed therebetween,
The laminate is integrally provided with a seal member for preventing leakage of a reactive gas supplied to the surface of the laminate on the outer periphery of the laminate,
The seal member includes a first seal portion that protrudes in the stacking direction of the stack structure on both surfaces of the seal member, and abuts against the opposing separator, and a second seal portion,
The first seal part and the second seal part are formed at positions separated by a predetermined distance as seen from the stacking direction.
Fuel cell. The fuel cell according to claim 1, wherein
The sealing member further includes
On the surface on the opposite side of the first seal part, the first seal part is disposed at a position overlapping the first seal part when viewed from the stacking direction, and comes into contact with the separator, thereby making contact with the first seal part. A first support for supporting a load acting in the stacking direction;
On the surface opposite to the second seal portion, the second seal portion is disposed at a position overlapping with the second seal portion when viewed from the stacking direction, and comes into contact with the separator, thereby making contact with the second seal portion. A second support that supports a load acting in the stacking direction;
A fuel cell comprising: The fuel cell according to claim 2, wherein
The first support part and the second support part are formed integrally with the seal member,
Fuel cell. A fuel cell according to any one of claims 1 to 3,
The separator is
A flat anode facing plate facing the anode of the laminate;
A plate-like cathode facing plate facing the cathode of the laminate;
An intermediate plate sandwiched between the anode facing plate and the cathode facing plate;
A fuel cell comprising:

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