A fuel cell electrode plate and fuel cell

Abstract

The present invention provides a fuel cell electrode plate and a fuel cell, the fuel cell electrode plate comprising: a plate body; a first surface of the plate body is provided with a plurality of first grooves, the plurality of first grooves are arranged side by side, the first grooves are used for the circulation of reaction gas; the first grooves extend in a serpentine shape, at least one groove section of the first groove is provided with a plurality of protrusions; the plurality of protrusions are spaced from each other and are sequentially arranged at the groove bottom of the first groove along the extension direction of the first groove. The present invention can not only reduce the flow velocity of the reaction gas in the extension direction of the first groove, but also provide a component velocity perpendicular to the membrane electrode direction for the mainstream flow of the reaction gas based on the protrusions, thereby increasing the speed of the reaction gas entering the reaction layer through the diffusion layer on the membrane electrode, thereby effectively improving the utilization rate of the reaction gas and improving the performance of the fuel cell.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a fuel cell electrode plate and a fuel cell. Background Art

[0002] A fuel cell is a power generation device that directly converts the chemical energy present in fuel and oxidant into electrical energy. As the most widely used type of existing fuel cells, hydrogen fuel cells are devices in which hydrogen and oxygen undergo electrochemical reactions under the action of catalysts. Its core component, the stack, is mainly composed of a membrane electrode and a stack of plates. Plates can be divided into graphite plates, metal plates, and composite plates according to their materials. Among them, metal plates have been widely used in recent years due to their low cost, thin thickness, and suitability for mass production.

[0003] At present, a plurality of first grooves are provided on the first surface of the electrode plate, and a plurality of second grooves are provided on the second surface of the electrode plate. The first grooves are used for the circulation of reaction gases, and the second grooves are used for the circulation of cooling liquid. The first surface of the electrode plate is suitable for being bonded to the membrane electrode, so that the reaction gas enters the diffusion layer on the membrane electrode while flowing through the first grooves, and diffuses to the reaction layer to generate an electrochemical reaction. The second surface of the electrode plate is suitable for being bonded to other electrode plates, so that the coolant flows through the second grooves while taking away the heat generated by the electrochemical reaction, thereby preventing the fuel cell from overheating and failing.

[0004] However, the gas flow channel structure on the existing electrode plate is simple, and the reaction gas has a short residence time in the gas flow channel. Before it fully enters the membrane electrode to participate in the electrochemical reaction, it is discharged along the gas flow channel, resulting in low utilization of the reaction gas, which is not conducive to improving the performance of the fuel cell. Summary of the invention

[0005] The present invention provides a fuel cell electrode plate and a fuel cell, which are used to solve the problem that the gas flow channel structure on the existing fuel cell electrode plate is simple and it is difficult to ensure the utilization rate of the reaction gas.

[0006] The present invention provides a fuel cell electrode plate, comprising: a plate body; a first surface of the plate body is provided with a plurality of first grooves, the plurality of first grooves are arranged side by side, and the first grooves are used for allowing reaction gas to flow; the first grooves extend in a serpentine shape, and at least one groove section of the first groove is provided with a plurality of protrusions; the plurality of protrusions are spaced from each other and are sequentially arranged at the groove bottom of the first groove along the extension direction of the first groove.

[0007] According to a fuel cell electrode plate provided by the present invention, the plurality of protrusions are arranged in sequence at equal intervals along the extension direction of the first groove;

[0008] and / or, the height of the protrusion is smaller than the depth of the first groove;

[0009] And / or, the width of the protrusion is equal to the groove width of the first groove.

[0010] According to a fuel cell electrode plate provided by the present invention, a first gas inlet and a first gas outlet are provided on the plate body; one end of the first groove extends to the first gas inlet, and the other end extends to the first gas outlet.

[0011] According to a fuel cell electrode plate provided by the present invention, the first groove includes a first groove section, a second groove section and a third groove section;

[0012] The first slot section, the second slot section and the third slot section are connected in sequence; one end of the first slot section away from the second slot section extends to the first gas inlet, and one end of the third slot section away from the second slot section extends to the first gas outlet; at least one of the first slot section and the third slot section is provided with the plurality of protrusions.

[0013] According to a fuel cell electrode plate provided by the present invention, the first groove is arranged in the reaction zone of the first surface; the first gas inlet and the first gas outlet are arranged on both sides of the reaction zone along the width direction of the reaction zone; the projections of the first gas inlet and the first gas outlet along the width direction of the reaction zone are staggered.

[0014] According to a fuel cell electrode plate provided by the present invention, a second gas inlet and a second gas outlet are provided on the plate body; the second gas inlet and the second gas outlet are arranged on both sides of the reaction zone along the length direction of the reaction zone.

[0015] According to a fuel cell electrode plate provided by the present invention, the first groove is provided in the reaction zone of the first surface, the second surface of the plate body is provided with a plurality of second grooves, the plurality of second grooves are arranged side by side, the second grooves are used for cooling liquid to flow, and the area where the second grooves are provided is opposite to the reaction zone;

[0016] The plate body is provided with a cooling liquid inlet and a cooling liquid outlet, and the cooling liquid inlet and the cooling liquid outlet are arranged on both sides of the reaction zone along the width direction of the reaction zone.

[0017] According to a fuel cell electrode plate provided by the present invention, the first groove and the protrusion are integrally stamped and formed, so that a first ridge is formed between two adjacent ones of the plurality of first grooves, a second ridge is formed between two adjacent ones of the plurality of second grooves, the first groove is opposite to the second ridge, and the second groove is opposite to the first ridge;

[0018] A third groove is formed on the second convex ridge, the third groove is opposite to the protrusion, and the second grooves on both sides of the second convex ridge are connected through the third groove.

[0019] According to a fuel cell electrode plate provided by the present invention, the fuel cell electrode plate is centrally symmetrically distributed.

[0020] The present invention further provides a fuel cell, comprising a shell, wherein the fuel cell electrode plate as described in any one of the above items is arranged in the shell.

[0021] A fuel cell electrode plate and a fuel cell provided by the present invention can not only reduce the flow velocity of the reaction gas in the extension direction of the first groove by arranging a plurality of protrusions on at least one section of the first groove for the reaction gas to circulate, but also provide a component velocity perpendicular to the membrane electrode direction for the mainstream flow of the reaction gas based on the protrusions, thereby increasing the speed at which the reaction gas enters the reaction layer through the diffusion layer on the membrane electrode, thereby effectively improving the utilization rate of the reaction gas and improving the performance of the fuel cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the top view of the structure of the fuel cell electrode plate provided by the present invention;

[0024] Figure 2 It is a schematic cross-sectional structural diagram of a fuel cell electrode plate provided by the present invention in an assembled state;

[0025] Figure 3 is a partially enlarged schematic diagram of the first surface of the fuel cell electrode plate provided by the present invention;

[0026] Figure 4 is a partially enlarged schematic diagram of the second surface of the fuel cell electrode plate provided by the present invention;

[0027] Figure 5 It is a schematic structural diagram of the first grooves and protrusions provided by the present invention distributed on the first surface of the plate body;

[0028] Figure 6 It is a schematic structural diagram of the distribution of the second groove and the third groove provided by the present invention on the second surface of the plate body.

[0029] Reference numerals:

[0030] 100: fuel cell electrode plate; 200: membrane electrode; 300: other plates; 110: plate body; 101: reaction zone; 102: first groove; 103: protrusion; 104: second groove; 105: third groove; 106: first ridge; 107: second ridge; 11: first gas inlet; 12: first gas outlet; 13: second gas inlet; 14: second gas outlet; 15: coolant inlet; 16: coolant outlet. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Combine the following Figure 1-Figure 6 A fuel cell electrode plate and a fuel cell according to the present invention are described.

[0033] like Figure 1 and Figure 2 As shown, this embodiment provides a fuel cell electrode plate, and the fuel cell electrode plate 100 includes: a plate body 110; a first surface of the plate body 110 is provided with a plurality of first grooves 102, the plurality of first grooves 102 are arranged side by side, and the first grooves 102 are used for allowing the reaction gas to flow; the first grooves 102 extend in a serpentine shape, and at least one groove section of the first groove 102 is provided with a plurality of protrusions 103; the plurality of protrusions 103 are spaced apart from each other, and are sequentially arranged at the groove bottom of the first groove 102 along the extension direction of the first groove 102.

[0034] Specifically, this embodiment provides a plurality of protrusions 103 on at least one section of the first groove 102 for the reaction gas to circulate, thereby not only reducing the flow velocity of the reaction gas in the extension direction of the first groove 102 and prolonging the residence time of the reaction gas in the flow channel corresponding to the first groove 102, but also providing a component velocity perpendicular to the direction of the membrane electrode 200 for the mainstream flow of the reaction gas based on the protrusions 103, thereby increasing the speed at which the reaction gas enters the reaction layer through the diffusion layer on the membrane electrode 200, thereby effectively improving the utilization rate of the reaction gas and improving the performance of the fuel cell.

[0035] Here, the fuel cell electrode plate 100 shown in this embodiment is suitable for a hydrogen fuel cell, and the fuel cell electrode plate 100 is preferably a metal electrode plate. When the fuel cell electrode plate 100 is used in a hydrogen fuel cell, the reaction gas flowing along the first groove 102 is hydrogen.

[0036] like Figure 1As shown, the first groove 102 shown in this embodiment is provided in the reaction zone 101 on the first surface of the plate body 110, and the reaction zone 101 is opposite to the membrane electrode 200 on one side of the plate body 110. In practical applications, the membrane electrode 200 is attached to the first surface of the plate body 110 to close the notch of the first groove 102, thereby forming a gas flow channel between the membrane electrode 200 and the first surface of the plate body 110, so that the reaction gas can flow along the gas flow channel.

[0037] Among them, the reaction zone 101 can be set as a rectangular area; the first groove 102 includes multiple groove segments, a part of the multiple groove segments extends along the width direction of the reaction zone 101, and another part of the multiple groove segments extends along the length direction of the reaction zone 101. When the multiple groove segments are connected in sequence, the first groove 102 can extend in a serpentine shape.

[0038] Since the first grooves 102 are arranged in a serpentine shape, compared with the gas flow path provided by the straight grooves, the gas flow path based on the first grooves 102 in this embodiment has a longer airflow path and a greater airflow resistance, which can extend the time that the reaction gas stays in the flow path and improve the reaction efficiency of the reaction gas.

[0039] Here, in the case where the first groove 102 includes a plurality of groove segments, the present embodiment may provide a plurality of protrusions 103 as shown in the above embodiment on some groove segments that are connected to or spaced apart from each other on the first groove 102, so as to extend the residence time of the reaction gas in the flow channel corresponding to the first groove 102 while ensuring that the reaction gas always has a certain flow rate.

[0040] At the same time, the first groove 102 shown in this embodiment is provided with a plurality of first grooves 102, and the plurality of first grooves 102 are arranged side by side, so as to arrange as many first grooves 102 as possible in the reaction zone 101. Thus, when the first groove 102 includes a plurality of groove sections, the groove sections of the plurality of first grooves 102 in this embodiment are also arranged side by side.

[0041] like Figure 2 As shown, since the plurality of protrusions 103 are spaced apart from each other and are sequentially arranged at the bottom of the first groove 102 along the extension direction of the first groove 102, when the reaction gas flows along the extension direction of the first groove 102, under the guiding effect of the protrusions 103, the reaction gas is substantially Figure 2 When the reaction gas flows through each protrusion 103 , the flow velocity V of the reaction gas can be decomposed into a first flow velocity Va parallel to the bottom of the first groove 102 and a second flow velocity Vb perpendicular to the bottom of the first groove 102 , and the second flow velocity Vb of the reaction gas points to the membrane electrode 200 .

[0042] In this way, when the reaction gas flows through each protrusion 103, the height difference between the protrusion 103 and the bottom of the first groove 102 will force the reaction gas to change the original flow direction and climb along the direction at an acute angle to the bottom of the first groove 102, thereby crossing over the protrusion 103. The behavior of crossing over the protrusion 103 changes the flow direction of the reaction gas, increases the second flow velocity Vb of the reaction gas, improves the diffusion speed and reaction efficiency of the reaction gas in the membrane electrode 200, and increases the utilization rate of the reaction gas in the fuel cell.

[0043] In some embodiments, Figure 2 , Figure 3 and Figure 5 As shown, the protrusions 103 shown in this embodiment may be square protrusions. In order to better guide the flow of the reaction gas, in this embodiment, a plurality of protrusions 103 are arranged in sequence at equal intervals along the extension direction of the first groove 102 .

[0044] In some embodiments, the height of the protrusion 103 is set to be smaller than the depth of the first groove 102 , so that the reaction gas can flow along the flow channel provided by the first groove 102 .

[0045] Meanwhile, in this embodiment, the width of the protrusion 103 can be set to be equal to the groove width of the first groove 102 .

[0046] Specifically, the first side surface of the protrusion 103 of the present embodiment is connected to the first groove wall surface of the first groove 102, the second side surface of the protrusion 103 is connected to the second groove wall surface of the first groove 102, and the first groove wall surface of the first groove 102 is opposite to the second groove wall surface. In this way, based on the arrangement structure of the protrusion 103 in the first groove 102, under the guidance of the protrusion 103, it can be ensured that the reaction gas is Figure 2 The wavy line form shown flows along the extension direction of the first groove 102 .

[0047] like Figure 1 As shown, the plate body 110 shown in this embodiment is provided with a first gas inlet 11 and a first gas outlet 12 ; one end of the first groove 102 extends to the first gas inlet 11 , and the other end extends to the first gas outlet 12 .

[0048] When the fuel cell electrode plate 100 is used in a hydrogen fuel cell, hydrogen is introduced as a reaction gas from the first gas inlet 11 and flows into the gas flow channel based on the first groove 102 from one end of the first groove 102. In the process of hydrogen flowing along the gas flow channel, based on the serpentine setting of the first groove 102 and the guidance of the hydrogen flow by the protrusion 103 in the first groove 102, the flow path and residence time of the hydrogen are extended, and the speed of hydrogen entering the reaction layer through the diffusion layer on the membrane electrode 200 is also increased, thereby effectively improving the utilization rate of hydrogen and improving the performance of the hydrogen fuel cell.

[0049] In this embodiment, the hydrogen gas reacts with the oxygen gas on the other side of the membrane electrode 200 after passing through the membrane electrode 200 .

[0050] In some embodiments, in order to better guide the flow of the reaction gas, the first groove 102 is specifically configured in this embodiment to include a first groove section, a second groove section and a third groove section.

[0051] The first slot section, the second slot section and the third slot section are connected in sequence; one end of the first slot section away from the second slot section extends to the first gas inlet 11, and one end of the third slot section away from the second slot section extends to the first gas outlet 12; at least one of the first slot section and the third slot section is provided with a plurality of protrusions 103.

[0052] In this embodiment, the first slot section and the third slot section may be provided with multiple protrusions 103 as shown in the above embodiment, and no protrusions are provided in the second slot section. This can change the flow direction of the reaction gas, improve the utilization rate of the reaction gas, and ensure that the reaction gas always has a certain flow rate.

[0053] Based on the scheme shown in the above embodiment, Figure 1 As shown, the first gas inlet 11 and the first gas outlet 12 shown in this embodiment are arranged on both sides of the reaction zone 101 along the width direction of the reaction zone 101; the projections of the first gas inlet 11 and the first gas outlet 12 along the width direction of the reaction zone 101 are staggered.

[0054] Here, in this embodiment, the area of ​​the first gas inlet 11 is equal to the area of ​​the first gas outlet 12. The first gas inlet 11 is arranged near the first end of the reaction zone 101 along the length direction, and the first gas outlet 12 is arranged near the second end of the reaction zone 101 along the length direction, and the first gas inlet 11 and the first gas outlet 12 are distributed in a centrally symmetrical manner relative to the center of the reaction zone 101.

[0055] In some embodiments, Figure 1As shown, the plate body 110 is provided with a second gas inlet 13 and a second gas outlet 14 ; the second gas inlet 13 and the second gas outlet 14 are respectively arranged at two sides of the reaction zone 101 along the length direction of the reaction zone 101 .

[0056] When the fuel cell electrode plate 100 is used for a hydrogen fuel cell, the second gas inlet 13 serves as an oxygen inlet, and the second gas outlet 14 serves as an oxygen outlet. Multiple second gas inlets 13 and second gas outlets 14 may be provided. Multiple second gas inlets 13 are arranged side by side along the width direction of the reaction zone 101, and multiple second gas outlets 14 are arranged side by side along the width direction of the reaction zone 101. The total area of ​​the multiple second gas inlets 13 is equal to the total area of ​​the multiple second gas outlets 14.

[0057] There are three second gas inlets 13 and three second gas outlets 14 , and the second gas inlets 13 and the second gas outlets 14 are disposed on both sides of the reaction zone 101 in an axisymmetric or centrosymmetric manner.

[0058] In some embodiments, Figure 1 , Figure 4 and Figure 6 As shown, the second surface of the plate body 110 shown in this embodiment is provided with a plurality of second grooves 104 , which are arranged side by side. The second grooves 104 are used for circulation of cooling liquid, and the area where the second grooves 104 are arranged is opposite to the reaction area 101 on the first surface of the plate body 110 .

[0059] The plate body 110 is provided with a cooling liquid inlet 15 and a cooling liquid outlet 16 . The cooling liquid inlet 15 and the cooling liquid outlet 16 are respectively arranged at two sides of the reaction zone 101 along the width direction of the reaction zone 101 .

[0060] like Figure 2 As shown, in actual application, the second surface of the plate body 110 is fitted with other plates 300 in the fuel cell to form a coolant flow channel based on the second groove 104, wherein the other plates 300 may be plates having the same or different structures as the fuel cell electrode plate 100 shown in this embodiment. Since the area where the second groove 104 is arranged is opposite to the reaction area 101 on the first surface of the plate body 110, the coolant will take away the heat generated by the electrochemical reaction while flowing through the coolant flow channel, thereby preventing the fuel cell from overheating and failing.

[0061] Compared with arranging the coolant inlet 15 and the coolant outlet 16 on both sides of the reaction zone 101 along the length direction, this embodiment reduces the distance the coolant flows by arranging the coolant inlet 15 and the coolant outlet 16 on both sides of the reaction zone 101 along the width direction of the reaction zone 101, thereby reducing the pressure loss and energy loss of the cooling system.

[0062] In this embodiment, a plurality of coolant inlets 15 and a plurality of coolant outlets 16 may be provided to ensure that sufficient coolant is provided for cooling the fuel cell electrode plate 100 .

[0063] like Figure 1 As shown, the multiple coolant inlets 15 shown in this embodiment are arranged near the second end of the reaction zone 101 along the length direction, and are arranged side by side along the length direction of the reaction zone 101; the multiple coolant outlets 16 are close to the first end of the reaction zone 101 along the length direction, and are arranged side by side along the length direction of the reaction zone 101; the multiple coolant inlets 15 and the multiple coolant outlets 16 are centrally symmetrically distributed relative to the center of the reaction zone 101, and the total area of ​​the multiple coolant inlets 15 is equal to the total area of ​​the multiple coolant outlets 16.

[0064] In some embodiments, Figures 3 to 6 As shown, the plate body 110 shown in this embodiment is preferably a metal plate body, and the first grooves 102 and the protrusions 103 on the plate body 110 are integrally stamped and formed, so that a first ridge 106 is formed between two adjacent ones of the plurality of first grooves 102, and a second ridge 107 is formed between two adjacent ones of the plurality of second grooves 104. In the thickness direction of the plate body 110, the first grooves 102 and the second ridges 107 are opposite to each other, and the second grooves 104 and the first ridges 106 are opposite to each other.

[0065] At the same time, a third groove 105 is formed on the second ridge 107 of this embodiment. The third groove 105 is opposite to the protrusion 103 along the thickness direction of the plate body 110 , and the second grooves 104 on both sides of the second ridge 107 are connected through the third groove 105 on the second ridge 107 .

[0066] Since the second grooves 104 are interconnected, when the coolant enters the coolant flow channel provided by the second grooves 104 through the coolant inlet 15, the coolant will flow smoothly through the entire coolant flow channel and finally be discharged from the coolant outlet 16, so as to take away the excess heat generated by the electrochemical reaction and keep the fuel cell always within an appropriate temperature range.

[0067] Here, in this embodiment, the overall design of the fuel cell electrode plate 100 may be distributed in a central symmetrical manner to ensure that the fuel cell electrode plate 100 has the same assembly performance and effect after being rotated 180°.

[0068] In summary, the fuel cell electrode plate 100 shown in this embodiment effectively prolongs the time that the reaction gas stays in the gas flow channel, increases the rate at which the reaction gas enters the membrane electrode 200, improves the reaction efficiency of the fuel cell and the utilization rate of the reaction gas, while ensuring that the coolant can smoothly pass through the coolant flow channel to maintain the normal operating temperature range of the fuel cell.

[0069] Preferably, this embodiment further provides a fuel cell, comprising a shell, in which the fuel cell electrode plate 100 as described in any one of the above items is arranged.

[0070] Specifically, since the fuel cell includes a fuel cell electrode plate 100, and the specific structure of the fuel cell electrode plate 100 refers to the above-mentioned embodiment, the fuel cell shown in this embodiment includes all the technical solutions of the above-mentioned embodiments, and therefore, at least has all the beneficial effects brought by all the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0071] The fuel cell electrode plate 100 shown in this embodiment is particularly suitable for hydrogen fuel cells.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fuel cell electrode plate, characterized in that: include: plate body; The first surface of the plate body is provided with a plurality of first grooves, the plurality of first grooves are arranged side by side, and the first grooves are used for allowing the reaction gas to flow; the first grooves extend in a serpentine shape, and at least one groove section of the first groove is provided with a plurality of protrusions; the plurality of protrusions are spaced from each other and are sequentially arranged at the groove bottom of the first groove along the extension direction of the first groove; The plate body is provided with a first gas inlet and a first gas outlet; one end of the first groove extends to the first gas inlet, and the other end extends to the first gas outlet; The first groove includes a first groove section, a second groove section and a third groove section; the first groove section, the second groove section and the third groove section are connected in sequence; one end of the first groove section away from the second groove section extends to the first gas inlet, and one end of the third groove section away from the second groove section extends to the first gas outlet; the first groove section and the third groove section are both provided with a plurality of the protrusions, and the second groove section is not provided with the protrusions.

2. The fuel cell electrode plate according to claim 1, characterized in that: The plurality of protrusions are arranged in sequence and at equal intervals along the extension direction of the first groove; and / or, the height of the protrusion is smaller than the depth of the first groove; And / or, the width of the protrusion is equal to the groove width of the first groove.

3. The fuel cell electrode plate according to claim 1, characterized in that: The first groove is arranged in the reaction zone of the first surface; the first gas inlet and the first gas outlet are arranged on both sides of the reaction zone along the width direction of the reaction zone; the projections of the first gas inlet and the first gas outlet along the width direction of the reaction zone are staggered.

4. The fuel cell electrode plate according to claim 3, characterized in that: The plate body is provided with a second gas inlet and a second gas outlet; the second gas inlet and the second gas outlet are arranged at two sides of the reaction zone along the length direction of the reaction zone.

5. The fuel cell electrode plate according to claim 1, characterized in that: The first groove is arranged in the reaction zone of the first surface, the second surface of the plate body is provided with a plurality of second grooves, the plurality of second grooves are arranged side by side, the second grooves are used for cooling liquid to flow, and the area where the second grooves are arranged is opposite to the reaction zone; The plate body is provided with a cooling liquid inlet and a cooling liquid outlet, and the cooling liquid inlet and the cooling liquid outlet are arranged on both sides of the reaction zone along the width direction of the reaction zone.

6. The fuel cell electrode plate according to claim 5, characterized in that: The first groove and the protrusion are integrally stamped and formed, so that a first ridge is formed between two adjacent ones of the plurality of first grooves, a second ridge is formed between two adjacent ones of the plurality of second grooves, the first groove is opposite to the second ridge, and the second groove is opposite to the first ridge; A third groove is formed on the second convex ridge, the third groove is opposite to the protrusion, and the second grooves on both sides of the second convex ridge are connected through the third groove.

7. The fuel cell electrode plate according to any one of claims 1 to 6, characterized in that: The fuel cell electrode plates are centrally symmetrically distributed.

8. A fuel cell, characterized in that: It comprises a shell, in which a fuel cell electrode plate as claimed in any one of claims 1 to 7 is arranged.

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