Single cell, fuel cell system, and vehicle

Abstract

The utility model relates to the technical field of fuel cells, aims to solve the technical problem that a sealing structure between a membrane electrode and a polar plate is easy to lose efficacy, and provides a single cell, a fuel cell system and a vehicle. Each single cell comprises a membrane electrode, a polar plate and a gas path sealing piece. A gas channel is arranged at the end part of the polar plate along the length direction. The gas channel is configured to allow a reaction gas to pass therethrough. The gas path sealing element is configured to be hot-pressed between the membrane electrode and the polar plate so as to bond the membrane electrode and the polar plate, and the projection of the gas path sealing element surrounds the projection of the gas channel in the thickness direction of the polar plate so as to seal the gas channel. The air channel sealing element has the beneficial effects that the air channel sealing element is arranged between the membrane electrode and the polar plate in a hot pressing manner, so that the thickness of the air channel sealing element can be reduced, and the membrane electrode and the polar plate are in an approximately attached state. When a plurality of single batteries are assembled into the electric pile, the probability of deformation of the gas path sealing element can be reduced, so that the sealing performance of the electric pile is effectively ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel cell, in particular to a single cell, a fuel cell system and a vehicle. BACKGROUND

[0002] A fuel cell is a device that converts the chemical energy of fuel directly into electricity. The integrated single cell structure is to encapsulate the anode plate, membrane electrode and cathode plate to form a part. Compared with the traditional bipolar plate structure which needs to be stacked alternately by membrane electrode and bipolar plate, the single cell structure can be directly stacked, which effectively improves the assembly efficiency of the stack.

[0003] The current single cell structure relies on the compression and elastic deformation of the sealing rubber strip between the membrane electrode and the plate to achieve sealing, with a thickness of about several hundred microns. When multiple single cells are stacked, the sealing rubber strip is prone to deformation, resulting in sealing failure of the stack, and safety problems such as gas leakage and even stack burning. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application provides a single cell, a fuel cell system and a vehicle to solve the technical problem that the sealing structure between the membrane electrode and the plate is prone to failure.

[0005] An embodiment of the present application provides a single cell, which comprises a membrane electrode, a plate and a gas path sealing piece. The plate is provided with a gas passage at the end thereof along the length direction. The gas passage is configured to pass the reaction gas. The gas path sealing piece is configured to be hot-pressed between the membrane electrode and the plate to bond the membrane electrode and the plate, and along the thickness direction of the plate, the projection of the gas path sealing piece surrounds the projection of the gas passage to seal the gas passage.

[0006] The gas path sealing piece is arranged between the membrane electrode and the plate, and the gas path sealing piece is connected to the membrane electrode and the plate by hot-pressing. The gas path sealing piece is arranged between the membrane electrode and the plate by hot-pressing, which can reduce the thickness of the gas path sealing piece, so that the membrane electrode and the plate are in a nearly close state. When multiple single cells are assembled into a stack, the probability of deformation of the gas path sealing piece can be reduced to effectively ensure the sealing of the stack, and the gas path sealing piece surrounds the gas passage, which is conducive to preventing gas leakage.

[0007] In some embodiments, the plate is provided with a reaction zone and a first distribution zone on the side facing the membrane electrode, and the first distribution zone is located between the gas passage and the reaction zone. Along the thickness direction of the plate, the projection of the gas path sealing piece surrounds the projection of the reaction zone and the first distribution zone.

[0008] On the side of the polar plate facing the membrane electrode, the gas channel sealing member also seals the periphery of the reaction zone and the first distribution zone, thereby increasing the coverage area of the gas channel sealing member on the polar plate, which can improve the sealing between the polar plate and the membrane electrode and increase the connection strength between the polar plate and the membrane electrode.

[0009] In some embodiments, the side of the polar plate facing the membrane electrode is further provided with a first support zone. The first support zone is located on both sides of the reaction zone along the width direction of the polar plate. The first support zone is provided with a first support structure. The first support structure is configured to provide a support force to the gas channel sealing member along the thickness direction.

[0010] When the membrane electrode and the polar plate are bonded and sealed by the gas channel sealing member, the first support structure provided in the first support zone can provide structural support for the sealing of the gas channel. In this way, when a plurality of single cells are assembled into a stack, the first support structure can still provide a support force to the adhesive film when the polar plate deforms, so that the gas channel sealing member is pressed and squeezed, thereby effectively preventing the gas channel sealing member from being suspended and not being pressed, and further ensuring the sealing strength of the gas channel and the air tightness of the entire stack.

[0011] In some embodiments, the thickness of the gas channel sealing member is in the range of 25 microns to 50 microns.

[0012] The gas channel sealing member with a thickness in the range of 25 microns to 50 microns is hot-pressed between the polar plate and the membrane electrode. The thinner gas channel sealing member can effectively ensure the sealing connection strength between the polar plate and the membrane electrode, and is less likely to deform when a plurality of single cells are stacked.

[0013] In some embodiments, the gas channel sealing member is a hot melt adhesive film.

[0014] In some embodiments, the polar plate is further provided with a cooling channel at the end thereof along the length direction. The cooling channel is configured to pass through a cooling medium. The polar plate has a cooling side, which is the side of the polar plate facing away from the membrane electrode. The cooling side is provided with a cooling sealing groove. Along the thickness direction of the polar plate, the projection of the cooling sealing groove surrounds the projection of the cooling channel. The single cell further comprises a cooling sealing member. The cooling sealing member is located in the cooling sealing groove and is configured to be elastically deformable. Along the thickness direction, when two polar plates are stacked and the cooling sides of each polar plate are arranged facing each other, the cooling sealing groove on each polar plate forms a cooling sealing cavity, and the cooling sealing member is elastically deformed under pressure to seal the cooling sealing cavity.

[0015] When a plurality of single cells are assembled into a stack, the polar plate of one single cell will be stacked with the polar plate of an adjacent single cell and the cooling sides will be arranged facing each other. The cooling sealing grooves on the cooling sides of the two polar plates will be enclosed to form a cooling sealing cavity, and the cooling sealing member will be elastically deformed under pressure, thereby completing the sealing connection between the single cells and sealing the cooling channel.

[0016] In some embodiments, a projection of the gas path seal separates the gas channel and the cooling channel in the thickness direction.

[0017] The end of the polar plate in the length direction is provided with a gas channel and a cooling channel, the gas channel is for passing the reaction gas, and the cooling channel is for passing the cooling medium. On the side of the polar plate facing the membrane electrode, the gas path seal separates the gas channel and the cooling channel, which can effectively prevent the reaction gas from entering the cooling channel or the cooling medium from entering the gas channel, and can ensure the normal progress of the electrochemical reaction in the single cell.

[0018] In some embodiments, the cooling side is provided with a cooling area and a second distribution area. The second distribution area is in communication with the cooling channel and the cooling area. In the thickness direction of the polar plate, the projection of the cooling seal groove surrounds the projection of the cooling area and the second distribution area.

[0019] In the thickness direction of the polar plate, the cooling seal covers sufficient area on the cooling side of the polar plate and surrounds the outer periphery of the cooling area and the second distribution area. This can ensure the sealing between the cooling sides of the two polar plates when the two polar plates are stacked, and can improve the structural strength of the multiple single cells assembled into a stack.

[0020] In some embodiments, the cooling side is further provided with a second support area. In the width direction of the polar plate, the second support area is located on both sides of the cooling area. The second support area is provided with a second support structure. The second support structure is configured to provide a support force to the cooling seal in the thickness direction.

[0021] When multiple single cells are assembled into a stack, the polar plate can be deformed under pressure. The second support structure of the cooling side can still provide a support force to the cooling seal, so that the cooling seal is in a state of being extruded, which is beneficial to prevent the cooling seal from being suspended and not under pressure, and can ensure the sealing of the stack.

[0022] In some embodiments, the single cell further comprises a cooling seal. The polar plate comprises a cathode plate and an anode plate. The membrane electrode and the cathode plate, and the membrane electrode and the anode plate are both provided with a gas path seal. The cooling seal is provided on the side of the cathode plate away from the membrane electrode or on the side of the anode plate away from the membrane electrode.

[0023] An embodiment of the present application provides a fuel cell system, which comprises a fuel cell stack. The fuel cell stack comprises a single cell.

[0024] An embodiment of the present application provides a vehicle, which comprises a single cell or a fuel cell system. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced in the following. It should be understood that the drawings below only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope.

[0026] Figure 1 An exploded view of a single cell according to an embodiment of the present application;

[0027] Figure 2 A structural schematic view of the gas path side of a polar plate according to an embodiment of the present application;

[0028] Figure 3 A structural schematic view of the cooling side of a polar plate according to an embodiment of the present application;

[0029] Figure 4 A structural schematic view of a vehicle according to an embodiment of the present application.

[0030] Main element symbol explanation:

[0031] 100, single cell; 1, membrane electrode; 2, polar plate; 20a, gas path side; 20b, cooling side; 2011, gas passage; 2011a, first gas passage; 2011b, second gas passage; 2012, cooling passage; 2021, reaction area; 2022, cooling area; 2031, first distribution area; 2032, second distribution area; 2041, first support area; 2042, second support area; 205, cooling sealing groove; 21, cathode plate; 22, anode plate; 3, gas path sealing member; 41, first support structure; 411, first reinforcing rib; 42, second support structure; 421, second reinforcing rib; 5, cooling sealing member; 200, fuel cell system; 300, vehicle. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0034] It should be noted that the terms "first", "second" are only used for the purpose of description, and should not be understood as indicating or implying relative importance.

[0035] It should be noted that when an element is considered to be "provided on" another element, it can be directly provided on the other element or a middle element can be present simultaneously.

[0036] An embodiment of the present application provides a single cell, comprising a membrane electrode, a polar plate and a gas path seal. The polar plate is provided with a gas passage at the end thereof along the length direction. The gas passage is configured to pass reaction gas. The gas path seal is configured to be hot-pressed between the membrane electrode and the polar plate to bond the membrane electrode and the polar plate, and along the thickness direction of the polar plate, the projection of the gas path seal surrounds the projection of the gas passage to seal the gas passage.

[0037] The gas path seal is arranged between the membrane electrode and the polar plate, and the gas path seal is connected to the membrane electrode and the polar plate in a hot-pressed manner. The gas path seal is arranged between the membrane electrode and the polar plate in a hot-pressed manner, which can reduce the thickness of the gas path seal, so that the membrane electrode and the polar plate are in a nearly bonded state. When a plurality of single cells are assembled into a stack, the probability of deformation of the gas path seal can be reduced, so as to effectively ensure the sealing of the stack, and the gas path seal surrounds the gas passage, which is conducive to preventing gas leakage.

[0038] In the related art, the membrane electrode and the polar plate of the single cell are sealed by the elastic deformation of the sealing rubber strip under stress. When a plurality of single cells are assembled into a fuel cell stack, the sealing rubber strip is prone to deformation under pressure, and the thickness of the sealing rubber strip is generally in the range of 200 microns to 500 microns, which is prone to overflow under pressure, affecting the air tightness of the fuel cell stack.

[0039] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0040] Please refer to Figure 1 An embodiment of the present application provides a single cell 100, comprising a membrane electrode 1, a polar plate 2 and a gas path seal 3. The polar plate 2 is provided with a gas passage 2011 at the end thereof along the length direction. The gas passage 2011 is configured to pass reaction gas. The gas path seal 3 is configured to be hot-pressed between the membrane electrode 1 and the polar plate 2 to bond the membrane electrode 1 and the polar plate 2, and along the thickness direction of the polar plate 2, the projection of the gas path seal 3 surrounds the projection of the gas passage 2011 to seal the gas passage 2011.

[0041] The gas path seal 3 is arranged between the membrane electrode 1 and the polar plate 2, and the gas path seal 3 is connected to the membrane electrode 1 and the polar plate 2 in a hot-pressed manner. The gas path seal 3 is arranged between the membrane electrode 1 and the polar plate 2 in a hot-pressed manner, which can reduce the thickness of the gas path seal 3, so that the membrane electrode 1 and the polar plate 2 are in a nearly bonded state. When a plurality of single cells 100 are assembled into a stack, the probability of deformation of the gas path seal 3 can be reduced, so as to effectively ensure the sealing of the stack, and the gas path seal 3 surrounds the gas passage 2011, which is conducive to preventing gas leakage.

[0042] In some embodiments, the side of the polar plate 2 facing the membrane electrode 1 is a gas path side 20a, which is provided with a reaction zone 2021 and a first distribution zone 2031, and the first distribution zone 2031 is located between the gas channel 2011 and the reaction zone 2021. In the thickness direction of the polar plate 2, the projection of the gas path seal 3 surrounds the projections of the reaction zone 2021 and the first distribution zone 2031.

[0043] The reaction zone 2021 is the area in the single cell 100 where the reaction gas undergoes electrochemical reaction. The first distribution zone 2031 is used to uniformly distribute the reaction gas into the reaction zone 2021.

[0044] On the gas path side 20a, the gas path seal 3 also seals the periphery of the reaction zone 2021 and the first distribution zone 2031, thereby increasing the coverage area of the gas path seal 3 on the polar plate 2, which can improve the sealing between the polar plate 2 and the membrane electrode 1, and increase the connection strength between the polar plate 2 and the membrane electrode 1.

[0045] In some embodiments, the gas path side 20a is also provided with a first support zone 2041. In the width direction of the polar plate 2, the first support zone 2041 is located on both sides of the reaction zone 2021. The first support zone 2041 is provided with a first support structure 41. The first support structure 41 is configured to provide a support force to the gas path seal 3 in the thickness direction.

[0046] When the membrane electrode 1 and the polar plate 2 are bonded and sealed by the gas path seal 3, the first support structure 41 provided in the first support zone 2041 can provide structural support for the sealing of the gas channel 2011. In this way, when the polar plate 2 deforms when the multiple single cells 100 are assembled into a stack, the first support structure 41 can still provide a support force to the adhesive film, so that the gas path seal 3 is pressed under stress, thereby effectively avoiding the gas path seal 3 being suspended and not being pressed, and further ensuring the sealing strength of the gas channel 2011 and the air tightness of the entire stack.

[0047] Please refer to Figure 2 In some embodiments, the first support structure 41 includes a plurality of first reinforcing ribs 411, which are uniformly distributed on the outside of the reaction zone 2021 in the length direction of the polar plate 2. Here, the outside is relative to the entire reaction zone 2021, i.e., the edge part of the reaction zone 2021. The first support structure 41 can also be a point-like protruding structure.

[0048] In some embodiments, the thickness of the gas path seal 3 is in the range of 25 microns to 50 microns.

[0049] The gas channel sealing member 3 with a thickness of 25-50 microns is hot-pressed between the polar plate 2 and the membrane electrode 1. The thinner gas channel sealing member 3 can effectively ensure the sealing strength between the polar plate 2 and the membrane electrode 1, and is less likely to deform when the plurality of single cells 100 are stacked.

[0050] In some embodiments, the gas channel sealing member 3 is a hot melt adhesive film.

[0051] When hot-pressing, the hot melt adhesive film is laid on the gas channel side 20a, and then the membrane electrode 1 and the polar plate 2 are adhered by hot pressing. It can be understood that the thickness of the hot melt adhesive film is 25-50 microns, and the membrane electrode 1 can be compressed in the thickness direction, that is, a certain thickness tolerance can be provided. When laying the hot melt adhesive film, a certain gap can also be left with the outer side edge of the polar plate 2. When the hot melt adhesive film is hot-pressed between the polar plate 2 and the membrane electrode 1, the hot melt adhesive film will not be pressed out.

[0052] In some embodiments, the polar plate 2 is further provided with a cooling channel 2012 at the end thereof along the length direction. The cooling channel 2012 is configured to pass through a cooling medium. The polar plate 2 has a cooling side 20b, which is the side of the polar plate 2 facing away from the membrane electrode 1. The cooling side 20b is provided with a cooling sealing groove 205. In the thickness direction of the polar plate 2, the projection of the cooling sealing groove 205 surrounds the projection of the cooling channel 2012. The single cell 100 further comprises a cooling sealing member 5. The cooling sealing member 5 is located in the cooling sealing groove 205 and is configured to be elastically deformable. In the thickness direction, when two polar plates 2 are stacked and the cooling sides 20b of each polar plate 2 are arranged facing each other, the cooling sealing groove 205 on each polar plate 2 forms a cooling sealing cavity, and the cooling sealing member 5 is elastically deformed under pressure to seal the cooling sealing cavity.

[0053] When the plurality of single cells 100 are assembled into a stack, the polar plate 2 of one single cell 100 is stacked with the polar plate 2 of an adjacent single cell 100 and the cooling sides 20b are arranged facing each other, and the cooling sealing grooves 205 of the cooling sides 20b of the two polar plates 2 are enclosed to form a cooling sealing cavity, and the cooling sealing member 5 is elastically deformed under pressure, thereby completing the sealing connection between the single cells 100 and sealing the cooling channel 2012.

[0054] In some embodiments, the thickness of the cooling sealing member 5 is 200-500 microns. Since there is a certain installation distance between one single cell 100 and another single cell 100 when the plurality of single cells 100 are assembled, the sealing connection of the cooling side 20b of the polar plate 2 is completed by arranging the elastically deformable cooling sealing member 5 in the cooling sealing groove 205. The size of the cooling sealing cavity in the thickness direction of the polar plate 2 is greater than the thickness of the cooling sealing member 5, that is, the two polar plates 2 are in transition fit or interference fit.

[0055] In some embodiments, the projection of the gas passage seal 3 separates the gas passage 2011 and the cooling passage 2012 along the thickness direction.

[0056] The end of the polar plate 2 along the length direction is provided with the gas passage 2011 and the cooling passage 2012, the gas passage 2011 is for the passage of the reaction gas, and the cooling passage 2012 is for the passage of the cooling medium. On the side of the polar plate 2 facing the membrane electrode 1, the gas passage seal 3 separates the gas passage 2011 and the cooling passage 2012, which can effectively prevent the reaction gas from entering the cooling passage 2012 or the cooling medium from entering the gas passage 2011, and can ensure the normal operation of the electrochemical reaction in the single cell 100.

[0057] In some embodiments, the gas passage 2011 includes a first gas passage 2011a and a second gas passage 2011b, and the cooling passage 2012 is located between the first gas passage 2011a and the second gas passage 2011b.

[0058] In some embodiments, the cooling side 20b is provided with a cooling area 2022 and a second distribution area 2032. The second distribution area 2032 communicates the cooling passage 2012 and the cooling area 2022. Along the thickness direction of the polar plate 2, the projection of the cooling seal groove 205 surrounds the projection of the cooling area 2022 and the second distribution area 2032.

[0059] After the cooling medium is uniformly distributed to the cooling area 2022 through the second distribution area 2032, the cooling area 2022 can take out the excess heat generated by the electrochemical reaction from the fuel cell stack through the flowing cooling medium, which helps to ensure that the single cell 100 operates within the optimal temperature range.

[0060] Along the thickness direction of the polar plate 2, the cooling seal 5 covers sufficient area on the cooling side 20b of the polar plate 2 and surrounds the outer periphery of the cooling area 2022 and the second distribution area 2032. On the one hand, it can ensure the sealing between the cooling sides 20b of the two polar plates 2 when the two polar plates 2 are stacked, and on the other hand, it can improve the structural strength of the fuel cell stack composed of multiple single cells 100.

[0061] In some embodiments, the cooling side 20b is further provided with a second support area 2042. Along the width direction of the polar plate 2, the second support area 2042 is located on both sides of the cooling area 2022. The second support area 2042 is provided with a second support structure 42. The second support structure 42 is configured to provide a support force to the cooling seal 5 along the thickness direction.

[0062] When multiple single cells 100 are assembled into a stack, the polar plate 2 can be deformed under pressure, and the second support structure 42 of the cooling side 20b can still provide a support force to the cooling seal 5, so that the cooling seal 5 is in a state of being pressed, which is conducive to preventing the cooling seal 5 from being suspended and not being pressed, and can ensure the sealing of the stack.

[0063] Please refer to Figure 3 In some embodiments, the second support structure 42 includes a plurality of second reinforcing ribs 421, which are uniformly distributed on the outer side of the cooling area 2022 along the length direction of the polar plate 2. Here, the outer side is relative to the entire cooling area 2022, i.e. the edge part of the cooling area 2022. The second support structure 42 can also be in the form of a protrusion.

[0064] When multiple single cells 100 are assembled, since the cooling seal cavities are formed between the cooling sides 20b of adjacent polar plates 2, and the thickness of the cooling seal 5 is greater than that of the gas path seal 3, the size of the second reinforcing rib 421 in the thickness direction of the polar plate 2 can be greater than that of the first reinforcing rib 411 in the thickness direction of the polar plate 2, which helps to ensure that the cooling seal 5 can be supported by the support force from the second reinforcing rib 421.

[0065] Please refer to Figure 1 In some embodiments, the single cell 100 further includes a cooling seal 5. The polar plate 2 includes a cathode plate 21 and an anode plate 22. The gas path seal 3 is arranged between the membrane electrode 1 and the cathode plate 21, and between the membrane electrode 1 and the anode plate 22. The cooling seal 5 is arranged on the side of the cathode plate 21 away from the membrane electrode 1 or on the side of the anode plate 22 away from the membrane electrode 1.

[0066] An embodiment of the present application provides a fuel cell system 200, which includes a fuel cell stack (not shown in the figure). The fuel cell stack includes a single cell 100.

[0067] Please refer to Figure 4 An embodiment of the present application provides a vehicle 300, which includes a single cell 100 or a fuel cell system 200.

[0068] In addition, those skilled in the art should understand that the above embodiments are only used to illustrate the present application, and are not used as a limitation to the present application, and as long as the above embodiments are within the spirit and scope of the present application, any suitable changes and modifications made to the above embodiments are within the scope of the present application.

Claims

1. A single cell characterized by, The single cell comprises: a membrane electrode, a plate provided with a gas passage at an end thereof in a length direction of the plate, the gas passage being configured to pass a reaction gas therethrough; and a gas passage seal configured to be hot-pressed between the membrane electrode and the plate to bond the membrane electrode and the plate, and in a thickness direction of the plate, a projection of the gas passage seal surrounds a projection of the gas passage to seal the gas passage.

2. The single cell according to claim 1, characterized by The plate is provided with a reaction zone and a first distribution zone on a side thereof facing the membrane electrode, the first distribution zone being located between the gas passage and the reaction zone; in the thickness direction of the plate, the projection of the gas passage seal surrounds the projection of the reaction zone and the first distribution zone.

3. The single cell according to claim 2, characterized by The plate is further provided with a first support zone on the side thereof facing the membrane electrode, the first support zone being located on both sides of the reaction zone in a width direction of the plate; The first support zone is provided with a first support structure configured to provide a support force to the gas passage seal in the thickness direction.

4. The single cell according to claim 1, characterized by The thickness of the gas passage seal ranges from 25 microns to 50 microns.

5. The single cell according to claim 1, characterized by The plate is further provided with a cooling passage at an end thereof in the length direction, the cooling passage being configured to pass a cooling medium therethrough; the plate has a cooling side, which is a side of the plate facing away from the membrane electrode; the cooling side is provided with a cooling seal groove, in the thickness direction of the plate, a projection of the cooling seal groove surrounds a projection of the cooling passage; The single cell further comprises a cooling seal located in the cooling seal groove and configured to be elastically deformable; in the thickness direction, when two plates are stacked with the cooling side of each plate facing each other, the cooling seal grooves on each plate are cooperatively formed into a cooling seal cavity, and the cooling seal is elastically deformed under pressure to seal the cooling seal cavity.

6. The single cell according to claim 5, characterized by In the thickness direction, the projection of the gas passage seal separates the gas passage and the cooling passage.

7. The single cell according to claim 5, characterized by The cooling side is provided with a cooling zone and a second distribution zone, the second distribution zone being in communication with the cooling passage and the cooling zone; in the thickness direction of the plate, the projection of the cooling seal groove separates the gas passage and the cooling passage and surrounds the projection of the cooling zone and the second distribution zone.

8. The single cell according to claim 7, characterized by The cooling side is further provided with a second support zone, the second support zone being located on both sides of the cooling zone in the width direction of the plate; The second support zone is provided with a second support structure configured to provide a support force to the cooling seal in the thickness direction.

9. The single cell according to claim 1, characterized by The single cell further comprises a cooling seal; the plate comprises a cathode plate and an anode plate, the gas passage seal is provided between the membrane electrode and the cathode plate and between the membrane electrode and the anode plate, and the cooling seal is provided on a side of the cathode plate facing away from the membrane electrode or on a side of the anode plate facing away from the membrane electrode.

10. A fuel cell system characterized by comprising: The fuel cell stack comprises the single cell according to any one of claims 1 to 9.

11. A vehicle characterized by comprising: A fuel cell system as claimed in claim 10, comprising a single cell as claimed in any one of claims 1 to 9.

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