CN213483785U

CN213483785U - Support structure and fuel cell using same

Info

Publication number: CN213483785U
Application number: CN202021714192.XU
Authority: CN
Inventors: 王阳; 王思偲; 杨华; 戴大伟; 刘智亮
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2021-06-18
Anticipated expiration: 2030-08-17

Abstract

The utility model relates to a supporting structure, including first metal bipolar plate, second metal bipolar plate and membrane electrode. The first metal bipolar plate comprises a first cathode surface and a first anode surface, the second metal bipolar plate comprises a second cathode surface and a second anode surface, the bottom end surface of the membrane electrode is in contact with the second anode surface, and the top end surface of the membrane electrode is in contact with the first cathode surface. A first gap exists between an edge portion of a top end face of the membrane electrode and an edge portion of the first cathode face, and a second gap exists between an edge portion of a bottom end face of the membrane electrode and an edge portion of the second anode face. A first supporting part is arranged in the first gap, a second supporting part is arranged in the second gap, the first supporting part is respectively contacted with the top end face and the first cathode face of the membrane electrode, and the second supporting part is respectively contacted with the bottom end face and the second anode face of the membrane electrode. The utility model discloses still relate to a fuel cell, this fuel cell is provided with above-mentioned bearing structure.

Description

Support structure and fuel cell using same

Technical Field

The utility model relates to a fuel cell field especially relates to a bearing structure and use this bearing structure's fuel cell.

Background

The proton exchange membrane fuel cell is a device for directly converting chemical energy into electric energy, and the fuel cell stack is generally formed by stacking components such as an end plate, an insulating plate, a current collecting plate, a plurality of bipolar plates, a plurality of membrane electrodes and the like, wherein each membrane electrode and two adjacent bipolar plates form a single cell, and all the single cells are connected in series to form the stack.

The working principle of the galvanic pile is that hydrogen and oxygen respectively enter an anode and a cathode inside the galvanic pile through hydrogen and oxygen inlets, the hydrogen continuously reacts under the action of a catalyst, electrons are lost to become hydrogen ions, the lost electrons directionally move, and continuous power supply is provided for an external load through a collector plate. And the hydrogen ions pass through the proton exchange membrane to react with the oxygen at the cathode to generate heat and water.

The metal bipolar plate is one of the key components of the fuel cell, provides a place for the gas reaction of the fuel cell, and needs to design a sealing structure around the polar plate and at the positions of gas and water inlets and outlets in order to ensure the sealing performance of gas cavities (hydrogen cavities, oxygen cavities and water cavities) in the use process of the metal polar plate. For the air-cooled fuel cell, the metal bipolar plate only has a hydrogen cavity and an oxygen cavity, the inlet and the outlet of the oxygen cavity are communicated with the outside, and when the cell works, air rapidly flows through the metal bipolar plate through a fan or a gas circulating device to provide oxygen required by reaction and take away heat generated by the reaction. Air flows through the bipolar plate flow channels of the stack from one side of the stack and out the other side.

However, the air-cooled metal bipolar plate fuel cell has a problem that when the air intake of the bipolar plate cathode flow channel is large enough, the frame of the membrane electrode deforms into a curved shape due to too large air pressure, so that the air inlet is shielded, the air inlet becomes small, the air flow rate becomes larger, and damage to the carbon paper or the membrane of the membrane electrode may be caused. Moreover, part of the air inlets are blocked, so that the air supply is insufficient, and the power of the battery is reduced sharply until the battery fails.

Patent CN201920530844 discloses a structure for supporting a membrane electrode in a metal plate, which mainly comprises: on the metal bipolar plate, an air cavity, a layer crossing structure and a flow field area which are punched and formed are arranged in parallel in sequence; an air inlet/outlet structure is also arranged at the gap of the layer crossing structure; a membrane electrode covers above the metal bipolar plate; a span area is arranged between the layer crossing structure and the air inlet/outlet structure and the flow field area, a dotted convex structure is arranged in the span area, and a plurality of dotted convex structures form a strip-shaped supporting belt together; the sealing structure formed by laser welding forms a curved sealing path around the gap between the points of the convex structure. The patent solves the problem that the span area between the flow field area and the gas inlet/outlet structure of the membrane electrode component in the traditional metal polar plate is sunken, and introduces a convex structure for supporting the membrane electrode to meet the requirements of supporting the membrane electrode and guiding the gas to flow and diffuse.

Patent CN104538654 discloses a sealing structure with a limiting function suitable for a thin bipolar plate, which comprises a thin bipolar plate, a membrane electrode frame and a sealing glue line, wherein a sealing groove is arranged on the thin bipolar plate, the bottom of the sealing groove is a plane, and two sides of the sealing groove are provided with a raised inner edge and a raised outer edge; the sealing glue line is arranged in the sealing groove and extends out of the outer edge of the sealing groove, the end part of the sealing glue line is flush with the outer edges of the thin bipolar plate and the membrane electrode frame, a groove is arranged at the outer edge of the sealing groove of the sealing glue line, the groove is matched with the outer edge of the sealing groove of the thin bipolar plate, and the surface of the sealing glue line, which is in contact with the membrane electrode frame, is a plane. The beneficial effects of the above technical scheme are: the sealing rubber wire and the sealing groove are mutually limited, so that the sealing performance of the galvanic pile is stable and reliable; the performance consistency among multiple sections of the galvanic pile is ensured; the sealing rubber wire is convenient to place and high in operation efficiency; the damping cushion has the functions of buffering and damping; the frame of the membrane electrode is connected with the sealing rubber line in a plane, so that the frame is not easy to deform, and the physical structure of the membrane electrode is prevented from being damaged; the sealing rubber wire is wide in material, easy to obtain and capable of being selected according to needs.

However, the existing technical scheme does not solve the problem that the edge of the frame of the membrane electrode is deformed under the influence of air flow, so that a flow passage opening is blocked or becomes small.

SUMMERY OF THE UTILITY MODEL

To the technical problem who exists among the prior art, the utility model provides a bearing structure and use this bearing structure's fuel cell, this bearing structure can support membrane electrode frame edge, makes it indeformable, and this bearing structure can carry out integration setting with the seal structure of current bipolar plate simultaneously to existing sealing function has the supporting role again.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a supporting structure comprises a first metal bipolar plate, a second metal bipolar plate and a membrane electrode, wherein the membrane electrode is clamped between the first metal bipolar plate and the second metal bipolar plate, the first metal bipolar plate comprises a first cathode surface and a first anode surface, the second metal bipolar plate comprises a second cathode surface and a second anode surface, the bottom end surface of the membrane electrode is in contact with the second anode surface, and the top end surface of the membrane electrode is in contact with the first cathode surface.

A first gap exists between an edge portion of a top end face of the membrane electrode and an edge portion of the first cathode face, and a second gap exists between an edge portion of a bottom end face of the membrane electrode and an edge portion of the second anode face. A first supporting part is arranged in the first gap, and a second supporting part is arranged in the second gap. The first supporting part is respectively contacted with the top end surface and the first cathode surface of the membrane electrode, and the second supporting part is respectively contacted with the bottom end surface and the second anode surface of the membrane electrode.

The first metal bipolar plate and the second metal bipolar plate may have the same structure or different structures.

In one embodiment, the first metal bipolar plate and the second metal bipolar plate have the same structure, the first support part is arranged on the first cathode surface and the second support part is arranged on the second cathode surface, and the second support part is arranged on the first anode surface and the second anode surface.

The first support portion and the second support portion may be elastic bodies or rigid bodies.

The utility model also provides a fuel cell, this fuel cell is provided with above-mentioned bearing structure. When the support structure is applied to a fuel cell, the first support portion and the second support portion are both disposed along an air flow path of the cathode flow channel.

The fuel cell is provided with the supporting structure, so that the problem that when the air-cooled airflow is large, the air inlet of the cathode flow passage of the air-cooled metal bipolar plate fuel cell is blocked by the membrane electrode frame is solved. The first supporting part and the second supporting part support the upper surface and the lower surface of the edge part of the membrane electrode, so that the area of the edge part of the membrane electrode can be kept flat and not bent, and an air inlet of a cathode flow channel cannot be blocked, namely the air inlet area of the cathode flow channel is consistent with the 100% of the flow channel sectional area at the beginning of design. The supporting structure can prevent the flow passage port of the cathode plate of the fuel cell from being blocked, and the oxygen inlet is ensured to be consistent with the oxygen inlet designed by theory.

The following description will be given with reference to specific examples.

Drawings

The figures further illustrate the invention, but the embodiments in the figures do not constitute any limitation of the invention.

Fig. 1 is a schematic diagram of the cathode surface structure of an air-cooled metal bipolar plate of a conventional fuel cell.

Fig. 2 is a schematic structural diagram of an anode surface of an air-cooled metal bipolar plate of a conventional fuel cell.

Fig. 3 is a schematic diagram of stack inlet air of a conventional fuel cell.

Fig. 4 is an enlarged view of a portion a of fig. 3.

Fig. 5 is a schematic diagram illustrating deformation of a membrane electrode of a conventional fuel cell by wind.

Fig. 6 is an enlarged view of a portion B of fig. 5.

Fig. 7 is a schematic view of the structure of the cathode face of the bipolar plate provided in example 1.

Fig. 8 is a schematic structural view of the anode surface of the bipolar plate provided in example 1.

Fig. 9 is a schematic diagram of a stack structure of an air-cooled fuel cell provided in embodiment 1.

Fig. 10 is an enlarged view of a portion C of fig. 9.

Fig. 11 is a schematic structural view of a bipolar plate provided in example 2.

Fig. 12 is a schematic diagram of a bipolar plate structure provided in embodiment 3.

Fig. 13 is a partially enlarged view of a bipolar plate provided in example 3.

Fig. 14 is a schematic structural view of a bipolar plate provided in example 4.

Fig. 15 is a schematic structural view of a bipolar plate provided in example 5.

Fig. 16 is a schematic diagram of a stack structure of an air-cooled fuel cell provided in example 5.

Fig. 17 is an enlarged view of a portion D of fig. 16.

Wherein the reference numerals are: 1. a metallic bipolar plate; 11. an anode face; 111. a hydrogen gas flow channel; 12. a cathode face; 121. an oxygen flow channel; 2. a membrane electrode; 3. a through hole; 41. a first seal ring; 42. a second seal ring; 51. a first gap; 52. a second gap; 61. a first support section; 62. a second support portion; 7. the sealing groove is externally supported; 71. a block-shaped sealing groove support; 8. and (7) installing holes.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, or indirectly coupled through intervening agents, both internally and/or in any other manner known to those skilled in the art. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

Comparative examples

As shown in fig. 1 to 4, the existing air-cooled fuel cell includes a metal bipolar plate 1 and a membrane electrode 2, and the metal bipolar plate 1 and the membrane electrode 2 are circularly stacked to form an "ABAB" type structure. The metal bipolar plate 1 comprises a cathode surface 12 and an anode surface 11, wherein an oxygen flow channel 121 is arranged on the cathode surface 12, a hydrogen flow channel 111 is arranged on the anode surface 11, and the projection of the hydrogen flow channel 111 on the cathode surface 12 is perpendicular to the oxygen flow channel 121. The top end face of the membrane electrode 2 is in contact with the cathode face 12, and the bottom end face of the membrane electrode 2 is in contact with the anode face 11.

The metal bipolar plate 1 is further provided with two through holes 3, the two through holes 3 are located at the orifices of the cathode surface 12 and are respectively arranged at the two ends of the hydrogen flow channel 111, and the two through holes 3 are located at the orifices of the anode surface 11 and are respectively arranged at the two sides of the oxygen flow channel 121.

The anode surface 11 is provided with a first sealing ring 41, the first sealing ring 41 is a closed-loop structure, the two through holes 3 are located at the orifice of the anode surface 11, and the hydrogen flow channel 111 is located in the inner ring of the first sealing ring 41. Two second sealing rings 42 are arranged on the cathode surface 12, the two second sealing rings 42 are both in a closed loop structure, and the two through holes 3 positioned at the orifices of the cathode surface 12 are respectively positioned in the inner rings of the two second sealing rings 42. The second sealing ring 42 performs a sealing function, and may be implemented by injection molding, stamping, cutting, or dispensing of silicon, in accordance with the sealing method disclosed in the prior art.

Each membrane electrode 2 and two adjacent metal bipolar plates 1 form a single cell, a first gap 51 exists between the edge part of the top end surface of the membrane electrode 2 and the edge part of the cathode surface 12 of one of the metal bipolar plates 1, and a second gap 52 exists between the edge part of the bottom end surface of the membrane electrode 2 and the edge part of the anode surface 11 of the other metal bipolar plate 1. The first gap 51 is an air inlet/outlet of the cathode flow channel (i.e., the oxygen flow channel 121).

When the air intake of the cathode flow channel of the metal bipolar plate 1 is large enough, the edge portion of the membrane electrode 2 near the air inlet is deformed into a curved shape due to too large air pressure (the arrow in fig. 5-6 is the air flow direction), which blocks the air inlet, so that the air inlet becomes small, the air flow rate becomes larger, and damage to the carbon paper or the membrane of the membrane electrode 2 may be caused. Moreover, a part of the air inlets can be blocked, so that the air supply is insufficient, and the power of the fuel cell can be reduced sharply until the fuel cell fails.

Example 1

As shown in fig. 7 to 8, the present embodiment provides a support structure comprising two metal bipolar plates 1a and a membrane electrode 2, the membrane electrode 2 being sandwiched between the two metal bipolar plates 1a, the metal bipolar plate 1a comprising a cathode face 12a and an anode face 11a, the bottom end face of the membrane electrode 2 being in contact with the anode face 11a of one of the metal bipolar plates 1a, and the top end face of the membrane electrode 2 being in contact with the cathode face 12a of one of the metal bipolar plates 1 a. A first gap 51 exists between an edge portion of the top end face of the membrane electrode 2 and an edge portion of the cathode face 12a, and a second gap 52 exists between an edge portion of the bottom end face of the membrane electrode 2 and an edge portion of the second anode face 11 a. The cathode face 12a of the metallic bipolar plate 1a is provided with a first support 61, the anode face 11a of the metallic bipolar plate 1a is provided with a second support 62, and the remaining structure of the metallic bipolar plate 1a is identical to that of the metallic bipolar plate 1 in the comparative example. The first support portions 61 are respectively provided at both ends of the oxygen gas flow passage 121 of the metal bipolar plate 1a, and the second support portions 62 are integrally connected to the first seal ring 41.

The first support portion 61 is located in the first gap 51, and the second support portion 62 is located in the second gap 52. The first support portion 61 is in contact with the top end face of the membrane electrode 2, and the second support portion 62 is in contact with the bottom end face of the membrane electrode 2. The first support portion 61 and the second support portion 62 are bar-shaped elastic bodies. The first support 61 and the second support 62 are both disposed along the gas flow direction on the cathode flow channel.

As shown in fig. 9-10, the present embodiment provides an air-cooled fuel cell using the above-described support structure. The first support portion 61 and the second support portion 62 mainly function to support the edge portion of the film electrode 2. The first support portion 61 and the cathode surface 12a may be connected by adhesion, welding, or other methods that prevent the first support portion from falling off due to the position limitation. For example, the first supporting portion 61 may be any strip-shaped or column-shaped object (such as silicon gel, modified silicon gel, rubber, olefin glue, etc.) that can be adhered to the metal bipolar plate 1a by glue or double-sided glue, and may also be a strip-shaped object that can be easily welded to the metal bipolar plate 1a (such as stainless steel, and then the strip-shaped object may also be a stainless steel series material, and the metal is welded to the cathode face 12a of the metal bipolar plate 1a by welding).

The first seal ring 41 functions as a seal, and the second support portion 62 connected to the first seal ring 41 functions as an edge portion of the bottom end face of the membrane electrode 2. When the first seal ring 41 and the second support portion 62 are integrated, they can be realized by injection molding, punching, cutting, dispensing, and the like.

Of course, the first sealing ring 41 and the second supporting portion 62 may not be integrated, at this time, the first sealing ring 41 functions to seal the air channel, which may be realized by injection molding (liquid glue), stamping (silicone pad), cutting (silicone pad), dispensing (liquid glue), and the like, the second supporting portion 62 functions to support the edge portion of the bottom end face of the support membrane electrode 2, and the second supporting portion 62 and the first supporting portion 61 have the same structure and implementation manner.

In contrast to the cathode face 12 (fig. 1) provided in the comparative example, the cathode face 12 provided in this embodiment is provided with a seal groove outer support 7 (the main function of the seal groove outer support 7 is to ensure that the first seal ring 41 is in the seal groove after being compressed and to ensure the edge structural strength of the metal bipolar plate 1 itself), and the seal groove outer support 7 on the cathode face 12a is divided into block-shaped seal groove supports 71 by the mechanism formed by the first seal ring 41 and the second support 62.

The second support 62 and the first support 61 support the upper and lower surfaces of the edge portion of the membrane electrode 2, and it can also be understood that the second support 62 and the first support 61 sandwich the edge portion of the membrane electrode 2, the middle of the adjacent first support 61 is an air inlet/exhaust port, and the second support 62 and the first support 61 ensure that the edge portion of the membrane electrode 2 does not deform.

The supporting structure and the fuel cell using the supporting structure provided by the embodiment can overcome the deformation problem of the edge part of the membrane electrode 2 close to the air inlet of the existing air-cooled fuel cell, ensure that the area of the air inlet of the cathode flow channel is the same as the design area, and simultaneously ensure that the fuel cell does not have the condition of insufficient air (oxygen).

Example 2

As shown in fig. 11, the present embodiment provides a metallic bipolar plate 1b, and the structure of the metallic bipolar plate 1b is changed on the basis of the metallic bipolar plate 1 a. The metal bipolar plate 1b is different from the metal bipolar plate 1a provided in embodiment 1 in that a second support portion 62b is provided outside the seal groove outer support 7, and the remaining structure is the same as that of the metal bipolar plate 1 a. The second supporting portion 62b is adhered to the metal bipolar plate 1b by a single-sided adhesive tape or by liquid silicone adhesive dispensing. The metallic bipolar plate 1b may be substituted for the metallic bipolar plate 1a used for the support structure in embodiment 1.

Example 3

As shown in fig. 12 to 13, the present embodiment provides a metallic bipolar plate 1c, in which the edge portion of the metallic bipolar plate 1c is provided with a mounting hole 8 therethrough, a second support portion 62c is integrally connected to a first support portion 61c, the second support portion 62c has a smaller width than the first support portion 61c, and the second support portion 62c just passes through the mounting hole 8. The metallic bipolar plate 1c may be substituted for the metallic bipolar plate 1a used for the support structure in embodiment 1.

Example 4

As shown in fig. 14, this embodiment is an improvement on embodiment 3, in which the second support portion 62c and the first support portion 61c that are integrally connected are integrally provided with the first seal ring 41, and in this embodiment, the width of the second support portion 62c is larger than that of the first support portion 61c, and the first support portion 61c just passes through the mounting hole 8. The seal groove outer support 7 on the cathode surface 12c of the metal bipolar plate 1c is divided into block-shaped seal groove supports 71 by a mechanism composed of the first seal ring 41 and the second support portion 62 c. The integrated structure of the first seal ring 41 and the second support portion 62c serves to seal and support the membrane electrode 2.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

Example 5

As shown in fig. 15, the present embodiment provides a metallic bipolar plate 1d in which the first support 61d and the second support 62d provided on the metallic bipolar plate 1d are not an elastomer or a gel but are a part of the metallic bipolar plate 1 d. The first support portions 61d are disposed at both sides of the oxygen flow channel (not shown in the drawings), and the first support portions 61d are not directly connected to the oxygen flow channel, so as to ensure the mechanical strength of both sides of the bipolar plate flow channel. The second support portion 62d is connected to the seal groove outer support 7. The first support portion 61d and the second support portion 62d are each realized by a method of punching or machining the edge portion of the metallic bipolar plate 1 d. The first support portion 61d and the second support portion 62d are both of a groove structure, and the opposite notches of the first support portion 61d and the second support portion 62d are fittingly connected.

As shown in fig. 16 to 17, this embodiment also provides an air-cooled fuel cell using the metal bipolar plate 1 d. The first support portion 61d and the second support portion 62d mainly function to support the edge portion of the film electrode 2. The air-cooled fuel cell provided in this example was stacked in the same manner as in example 1.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A support structure comprising a first metallic bipolar plate, a second metallic bipolar plate, and a membrane electrode, the membrane electrode being sandwiched between the first metallic bipolar plate and the second metallic bipolar plate, the first metallic bipolar plate comprising a first cathode face and a first anode face, the second metallic bipolar plate comprising a second cathode face and a second anode face, a bottom end face of the membrane electrode being in contact with the second anode face, a top end face of the membrane electrode being in contact with the first cathode face, characterized in that:

a first gap exists between the edge part of the top end surface of the membrane electrode and the edge part of the first cathode surface, and a second gap exists between the edge part of the bottom end surface of the membrane electrode and the edge part of the second anode surface;

the first gap is internally provided with a first supporting part, the second gap is internally provided with a second supporting part, the first supporting part is respectively contacted with the top end surface of the membrane electrode and the first cathode surface, and the second supporting part is respectively contacted with the bottom end surface of the membrane electrode and the second anode surface.

2. A support structure according to claim 1, wherein: the first cathode face and the second cathode face are provided with first supporting portions, and the first anode face and the second anode face are provided with second supporting portions.

3. A fuel cell, characterized by: a support structure according to any one of claims 1-2 is provided.

4. A fuel cell according to claim 3, wherein: the first support portion and the second support portion are each disposed along an air flow path of a cathode flow channel of the fuel cell.

5. A fuel cell according to claim 4, wherein: the first supporting parts are respectively arranged at two ends of an oxygen flow channel of the fuel cell, and the second supporting parts are integrally connected with the first sealing ring.

6. A fuel cell according to claim 5, wherein: and a block-shaped sealing groove is arranged between the adjacent second supporting parts for supporting.

7. A fuel cell according to claim 4, wherein: the second supporting part is arranged on the outer side of the outer support of the sealing groove.

8. A fuel cell according to claim 4, wherein: the metal bipolar plate of the fuel cell is provided with a through mounting hole, and the first support part and the second support part are integrally connected.

9. A fuel cell according to claim 8, wherein: the width of the second supporting part is smaller than that of the first supporting part, and the second supporting part penetrates through the mounting hole.

10. A fuel cell according to claim 8, wherein: the second supporting part and the first sealing ring are integrally arranged, the width of the second supporting part is larger than that of the first supporting part, and the first supporting part penetrates through the mounting hole.