An end plate of a fuel cell and a fuel cell

Abstract

The present invention provides an end plate of a fuel cell and a fuel cell. The end plate of the fuel cell includes: a first end plate and a second end plate. Both the first end plate and the second end plate are transparent end plates. The side surface of the first end plate facing away from the second end plate is arranged in contact with the electrode plate of the fuel cell; on the first end plate, a first cavity is formed on the side surface opposite to the second end plate, and / or on the second end plate, a second cavity is formed on the side surface opposite to the first end plate. An air extraction hole is formed on the first end plate and / or the second end plate. The air extraction hole is communicated with the first cavity and / or the second cavity, so that the first cavity and / or the second cavity can be evacuated through the air extraction hole. According to the present invention, the cavity sandwiched between the two end plates can be evacuated, which plays a role in heat insulation and heat preservation, prevents gas atomization, and improves the performance of the fuel cell; a anti-fog coating is also provided on the side surface of the first end plate in contact with the metal electrode plate to prevent gas atomization and further improve the performance of the fuel cell.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and particularly relates to an end plate of a fuel cell and a fuel cell. Background Art

[0002] Water management of fuel cells has a very important impact on battery performance and durability. Poor water management may cause flooding in the flow channels and lead to a decline in battery performance. There are mainly two methods for the research of water management: numerical simulation and experimental research. Among them, visualization technology is a very convenient experimental method. During the operation of the battery, experimental personnel can directly observe the movement behavior of water inside the battery through a transparent end plate online.

[0003] Due to the poor heat conduction ability of the transparent battery end plate, it is extremely easy to cause uneven temperature distribution of the battery, which severely restricts the performance of the transparent battery. In addition, a large temperature difference between the inside and outside of the battery will also cause the surface of the end plate to be easily fogged, which not only affects the observer's line of sight but also cannot accurately determine whether the water inside the battery is generated by electrochemical reaction or formed by condensation of high-temperature water vapor. Therefore, the anti-fog design of the transparent battery is very important.

[0004] During the operation of the existing transparent battery, problems such as easy fogging of the end plate surface and low battery performance are easily caused due to uneven temperature distribution. Therefore, the present invention researches and designs an end plate of a fuel cell and a fuel cell. Summary of the Invention

[0005] Therefore, the main technical problem to be solved by the present invention is mainly to overcome the defects that during the operation of the existing transparent battery, the surface of the end plate is easily fogged due to uneven temperature distribution, resulting in low battery performance, so as to provide an end plate of a fuel cell and a fuel cell.

[0006] To solve the above problems, the present invention provides an end plate of a fuel cell, which includes:

[0007] A first end plate and a second end plate, the first end plate and the second end plate are joined, both the first end plate and the second end plate are transparent end plates, and the side surface of the first end plate facing away from the second end plate is arranged to be joined with the electrode plate of the fuel cell;

[0008] On the side surface of the first end plate opposite to the second end plate, a first cavity is opened, and / or on the side surface of the second end plate opposite to the first end plate, a second cavity is opened. An air extraction hole is opened on the first end plate and / or the second end plate, and the air extraction hole is communicated with the first cavity and / or the second cavity, so as to be able to evacuate the first cavity and / or the second cavity through the air extraction hole.

[0009] Preferably, the air extraction hole is formed through one side of the second end plate facing away from the first end plate to a position communicating with the first cavity and / or the second cavity.

[0010] Preferably, a first sealing groove is further formed on the side surface of the first end plate where the first cavity is formed, and the first sealing groove is arranged around the first cavity; and / or, a second sealing groove is further formed on the side surface of the second end plate where the second cavity is formed, and the second sealing groove is arranged around the second cavity.

[0011] Preferably, a first sealing strip is further arranged in the first sealing groove; and / or, a second sealing strip is further arranged in the second sealing groove.

[0012] Preferably, an anti-fogging coating is further applied on one side surface of the first end plate in contact with the electrode plate.

[0013] Preferably, a third sealing groove is further formed on one side surface of the first end plate in contact with the electrode plate, and the anti-fogging coating is applied on the inner surface of the third sealing groove.

[0014] Preferably, a first inlet is arranged on the first end plate, a second inlet is arranged on the second end plate, the first inlet is communicated with the second inlet, and gas enters the electrode plate in sequence from the second inlet and the first inlet;

[0015] A first outlet is arranged on the first end plate, a second outlet is arranged on the second end plate, the first outlet is communicated with the second outlet, and gas flows out of the electrode plate in sequence along the first outlet and the second outlet.

[0016] Preferably, both the first inlet and the first outlet are arranged in a way of penetrating through two side surfaces of the first end plate; both the second inlet and the second outlet are arranged in a way of penetrating through two side surfaces of the second end plate.

[0017] The present invention further provides a fuel cell, which includes the end plate of the fuel cell described in any one of the preceding items, and further includes an electrode plate and a membrane electrode. One electrode plate is arranged on each side of the membrane electrode, and one end plate is arranged on the outer side of each of the two electrode plates respectively.

[0018] Preferably, at least one sunken flow channel is arranged on the side surface of the electrode plate opposite to the membrane electrode, gas flows in the flow channel and contacts the membrane electrode to react, and a rib is formed between two adjacent flow channels.

[0019] Preferably, a reinforcing rib is connected between the ends of two adjacent convex strips, and the height of the raised reinforcing rib is lower than the height of the convex strip; and / or, a plurality of the flow channels are arranged in parallel at intervals; and / or, the flow channels are of a hollow structure.

[0020] Preferably, a flow dividing groove is provided on the plate electrode at a common end of a plurality of the flow channels, and the flow dividing groove is communicated with all the flow channels; a flow collecting groove is provided on the plate electrode at the common other end of the plurality of the flow channels, and the flow collecting groove is communicated with all the flow channels.

[0021] Preferably, when a first inlet is provided on the first end plate and a second inlet is provided on the second end plate: the first inlet is communicated with the flow dividing groove;

[0022] When a first outlet is provided on the first end plate and a second outlet is provided on the second end plate: the first outlet is communicated with the flow collecting groove.

[0023] Preferably, a fourth sealing groove is further provided on the side surface of the plate electrode where the flow channel is opened, and the fourth sealing groove is arranged around the flow channel.

[0024] Preferably, a third sealing strip is further provided in the fourth sealing groove.

[0025] The end plate of a fuel cell and the fuel cell provided by the present invention have the following beneficial effects:

[0026] 1. By adopting a structural form of opening a cavity on at least one of the side surfaces of the two end plates of the transparent end plate of the fuel cell, and by providing an air extraction hole to communicate with the cavity, the present invention can effectively evacuate the cavity sandwiched between the two end plates, so that the cavity can effectively play a role in heat insulation and heat preservation, can effectively prevent gas atomization, and improve the performance of the fuel cell; the present invention also adopts a form of providing an anti-fog coating on the side surface of the first end plate in contact with the metal plate electrode, and can effectively prevent gas atomization through the anti-fog coating, further improving the performance of the fuel cell;

[0027] 2. The present invention also improves the sealing performance of the cavity by providing a sealing groove in the form of surrounding the cavity on the side of the end plate, and preferably by providing a sealing strip in the sealing groove, which can prevent the vacuum state in the cavity from being destroyed and gas from entering the cavity. Therefore, it can improve the heat insulation and heat preservation effect of the cavity, enhance the anti-fogging effect of the fuel cell, and further improve the performance of the cell. The present invention also improves the strength and stiffness of the ridges on both sides of the flow channel by providing a reinforcing rib between the ends of the adjacent ridges of the flow channel on the plate electrode, ensuring the normal structure of the flow channel, the normal gas flow, and the normal reaction. By providing multiple flow channels arranged in parallel at intervals, the contact area between the gas and the membrane electrode in the flow channel can be increased, improving the effect of the electrochemical reaction. And by making the height of the reinforcing rib lower than that of the ridge and higher than that of the flow channel, a disturbing effect will be generated when the fluid enters the flow channel through the reinforcing rib, playing a role in strengthening mass transfer, and ensuring that the fluid does not flow out of the flow channel from the upper end of the ridge, ensuring the normal flow of the air flow along the flow channel, and improving the effect of strengthening mass transfer of the fluid and the effect of the electrochemical reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic exploded view of the transparent fuel cell of the present invention;

[0029] Figure 2 is an exploded view of the end plate of the transparent fuel cell of the present invention;

[0030] Figure 3 is a structural diagram of the plate electrode of the transparent fuel cell of the present invention;

[0031] Figure 4 is Figure 3 a partially enlarged structural diagram of part A in

[0032] The reference numerals are shown as:

[0033] 1, plate electrode; 10, second cavity; 12, ridge; 13, fourth sealing groove; 2, flow channel; 3, shunt groove; 4, confluence groove; 5, reinforcing rib; 100, end plate; 6, first end plate; 61, third sealing groove; 62, first inlet; 63, first outlet; 7, second end plate; 71, second sealing groove; 72, second inlet; 73, second outlet; 11, air extraction hole; 200, membrane electrode. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] As Figures 1-4 shown, the present invention provides an end plate of a fuel cell, which includes:

[0035] A first end plate 6 and a second end plate 7, the first end plate 6 and the second end plate 7 are joined, both the first end plate 6 and the second end plate 7 are transparent end plates, and one side surface of the first end plate 6 and the second end plate 7 facing away from each other is arranged in contact with the electrode plate of the fuel cell;

[0036] On one side surface of the first end plate 6 opposite to the second end plate 7, a first cavity is provided, and / or on one side surface of the second end plate 7 opposite to the first end plate 6, a second cavity 10 is provided. An air extraction hole 11 is provided on the first end plate 6 and / or the second end plate 7, and the air extraction hole 11 communicates with the first cavity and / or the second cavity 10, so as to be able to evacuate the first cavity and / or the second cavity 10 through the air extraction hole 11.

[0037] By adopting the structural form of providing a cavity on at least one of the side surfaces of the two end plates of the transparent end plate of the fuel cell, and arranging an air extraction hole to communicate with the cavity, the present invention can effectively evacuate the cavity clamped between the two end plates, so that the cavity can effectively play a role in heat insulation and heat preservation, can effectively prevent gas atomization, and improve the performance of the fuel cell.

[0038] The present invention provides a transparent battery that can prevent atomization, which well solves the problems of easy atomization on the surface of the end plate and low battery performance caused by uneven temperature distribution during the operation of the transparent battery, thereby improving the performance of the transparent battery, extending its service life, and being easy to process, saving time and resources.

[0039] Aiming at the problems that the surface of the end plate of the transparent battery is easy to be atomized, affecting the line of sight, and the battery performance is low, the present invention provides a transparent battery with an anti-atomization end plate, which is composed of components such as a metal electrode plate, a transparent end plate, and a membrane electrode. The anti-atomization design of the anti-atomization end plate includes two aspects: one is that an anti-fog coating is applied on the side of the end plate in contact with the electrode plate, and the other is that a cavity is provided on the end plate, and heat preservation is achieved by evacuating the air.

[0040] The transparent end plate includes two inner and outer end plates. Both surfaces of the two end plates are provided with inlets and outlets for gas to circulate the reaction gas. A sealing groove is provided on the side of the inner end plate in contact with the metal electrode plate, and an anti-fog coating is applied on the surface. Part of the material is dug out on the side of the outer end plate in contact with the inner end plate to form a cavity, and sealing grooves are provided around the cavity. The inner end plate and the outer end plate are combined to form the transparent end plate. A single air extraction hole is provided on the outermost side of the transparent end plate to communicate with the cavity for facilitating the extraction of vacuum. The cavity plays a role in heat insulation and heat preservation, and can effectively prevent gas atomization.

[0041] A plurality of positioning holes are provided on the surfaces of both the metal electrode plate and the transparent end plate for assembly positioning.

[0042] Preferably, the air extraction hole 11 penetrates through from a side surface of the second end plate 7 facing away from the first end plate 6 to a position communicating with the first cavity and / or the second cavity 10. This is the preferred structural form of the air extraction hole of the present invention. By providing the air extraction hole penetrating through the second end plate on the outer side, an air extraction device can be introduced externally to effectively evacuate the cavity.

[0043] Preferably, a first sealing groove (not shown in the figure) is further provided on the side surface of the first end plate 6 where the first cavity is opened, and the first sealing groove is arranged around the first cavity; and / or, a second sealing groove 71 is further provided on the side surface of the second end plate 7 where the second cavity 10 is opened, and the second sealing groove 71 is arranged around the second cavity 10. The present invention also improves the sealing performance of the cavity by providing a sealing groove in the form of surrounding the cavity on the side surface of the end plate where the cavity is provided, and preferably by arranging a sealing strip in the sealing groove, which can prevent the vacuum state in the cavity from being destroyed and gas from entering the cavity. Therefore, the heat insulation and heat preservation effect of the cavity can be improved, the anti-fogging effect of the fuel cell can be improved, and the performance of the battery can be further improved.

[0044] Preferably, a first sealing strip is further provided in the first sealing groove; and / or, a second sealing strip is further provided in the second sealing groove 71. The structural form of the sealing strip can further improve the sealing performance of the cavity, prevent gas from entering the vacuum cavity, improve the anti-fogging effect, and improve the battery performance.

[0045] Preferably, an anti-fogging coating is further applied on a side surface of the first end plate 6 in contact with the electrode plate 1. The present invention also improves the performance of the fuel cell by effectively preventing gas atomization through the anti-fogging coating in the form of providing the anti-fogging coating on a side surface of the first end plate in contact with the metal electrode plate.

[0046] Preferably, a third sealing groove 61 is further provided on a side surface of the first end plate 6 in contact with the electrode plate, and the anti-fogging coating is applied on the inner surface of the third sealing groove. By providing the third sealing groove on the side surface of the first end plate opposite to the electrode plate and arranging the anti-fogging coating on the inner surface of the third sealing groove, on the basis of improving the effective sealing between the end plate and the electrode plate, the anti-fogging effect of the end plate can be effectively enhanced by the anti-fogging coating, and the performance of the battery can be improved.

[0047] Preferably, a first inlet 62 is provided on the first end plate 6, and a second inlet 72 is provided on the second end plate 7. The first inlet 62 is communicated with the second inlet 72, and gas enters the electrode plate in sequence from the second inlet 72 and the first inlet 62;

[0048] A first outlet 63 is provided on the first end plate 6, and a second outlet 73 is provided on the second end plate 7. The first outlet 63 communicates with the second outlet 73, and gas flows out of the electrode plate successively along the first outlet 63 and the second outlet 73.

[0049] This is a preferred setting form of the inlets and outlets on the inner and outer end plates of the present invention. Gas can be introduced into the electrode plate from the outside successively through the second inlet and the first inlet, and the gas that has reacted in the electrode plate can be led outwards successively through the first outlet and the second outlet.

[0050] Preferably, both the first inlet 62 and the first outlet 63 are provided in a manner of penetrating through two sides of the first end plate 6; both the second inlet 72 and the second outlet 73 are provided in a manner of penetrating through two sides of the second end plate 7. This is a preferred setting form of the first inlet and the first outlet opened on the first end plate of the present invention, and the preferred setting form of the second inlet and the second outlet opened on the second end plate. The air flow can be smoothly introduced and led out through the penetrating manner.

[0051] The present invention also provides a fuel cell, which includes the end plate of the fuel cell described in any previous item, and further includes an electrode plate 1 and a membrane electrode 200. One electrode plate 1 is provided on each side of the membrane electrode 200, and one end plate 100 is provided on the outer side of each of the two electrode plates 1.

[0052] The present invention proposes a transparent battery that can prevent fogging, which well solves the problems of easy fogging on the surface of the end plate and low battery performance caused by uneven temperature distribution during the operation of the transparent battery, thereby improving the performance of the transparent battery, extending its service life, being easy to process, and saving time and resources.

[0053] Aiming at the problems that the surface of the end plate of the transparent battery is prone to fogging, affecting the line of sight, and the battery performance is low, the present invention proposes a transparent battery with an anti-fogging end plate, which is composed of components such as a metal electrode plate, a transparent end plate, and a membrane electrode. The anti-fogging design of the anti-fogging end plate includes two aspects: one is that an anti-fogging coating is applied on the side of the end plate in contact with the electrode plate, and the other is that the end plate is provided with a cavity, and heat preservation is achieved by means of vacuum pumping.

[0054] The transparent battery is obtained by assembling the metal electrode plate, the transparent end plate, and the membrane electrode.

[0055] The structure of the present invention is simple and easy to process; the assembled transparent battery has a good anti-fogging effect and extends its service life.

[0056] Preferably, at least one sunken flow channel 2 is provided on the side surface of the electrode plate 1 opposite to the membrane electrode 200. Gas flows in the flow channel 2 and contacts the membrane electrode 200 to carry out a reaction, and a rib 12 is formed between two adjacent flow channels 2. Through the flow channels, a space for accommodating gas flow can be formed in the present invention. Multiple flow channels can increase the contact area between the gas and the membrane electrode and improve the reaction efficiency.

[0057] Specifically, the transparent end plate is formed by processing a polycarbonate transparent material with a thickness of 10-20 mm, and the metal electrode plate is formed by processing a stainless steel metal material with a thickness of 0.5-3 mm. Multiple straight flow channels and inlet and outlet manifolds are processed in the middle of the electrode plate by wire cutting.

[0058] Preferably, a reinforcing rib 5 is connected between the ends of two adjacent ribs 12, and the height of the protruding reinforcing rib 5 is lower than the height of the rib; and / or, multiple flow channels 2 are arranged in parallel at intervals; and / or, the flow channel 2 is a hollow structure.

[0059] In the present invention, by providing a structure with a reinforcing rib between the ends of adjacent ribs of the flow channels on the electrode plate, the strength and stiffness of the ribs on both sides of the flow channel can be improved, ensuring the normal structure of the flow channel, ensuring the normal gas flow and normal reaction. By arranging multiple flow channels arranged in parallel at intervals, the contact area between the gas and the membrane electrode in the flow channel can be increased, improving the effect of the electrochemical reaction; and by making the height of the reinforcing rib lower than the height of the rib, when the fluid enters the flow channel through the reinforcing rib, a disturbing effect will be generated, playing a role in strengthening mass transfer, and ensuring that the fluid will not flow out of the flow channel from the upper end of the rib, ensuring the normal flow of the air flow along the flow channel, and improving the effect of strengthening mass transfer of the fluid and the effect of the electrochemical reaction.

[0060] Multiple parallel straight flow channels are provided on the surface of the metal electrode plate. A gas manifold is provided at each of the upper and lower parts of the flow channel. The flow channel and the manifold form a gas flow region. A sealing groove is provided around the flow region for placing a rubber strip. The ridge of the flow channel and the metal electrode plate are connected by two reinforcing ribs, ensuring the strength of the electrode plate. The reinforcing rib is lower than the height of the rib and higher than the flow channel, effectively forming a groove, ensuring the passage of gas and increasing the gas flow rate in the flow channel, playing a role in strengthening mass transfer.

[0061] Preferably, a flow dividing groove 3 is provided on the electrode plate 1 at the common end of multiple flow channels 2, and the flow dividing groove 3 is communicated with multiple flow channels 2; a collecting groove 4 is provided on the electrode plate 1 at the common other end of multiple flow channels 2, and the collecting groove 4 is communicated with multiple flow channels 2. The flow dividing groove can accommodate the incoming gas and carry out a flow dividing effect on the incoming gas, and the collecting groove can collect the gas after the reaction in multiple flow channels and discharge the collected gas.

[0062] A rectangular hydrogen / oxygen inlet / outlet manifold is provided at each of the upper and lower parts of the flat direct current channel. The opening sizes are the same and symmetric up and down. The channel and the manifold form a flow region for hydrogen / oxygen, and a sealing groove is provided around the flow region for placing rubber strips.

[0063] Preferably, when a first inlet 62 is provided on the first end plate 6 and a second inlet 72 is provided on the second end plate 7: the first inlet 62 communicates with the shunt groove 3;

[0064] When a first outlet 63 is provided on the first end plate 6 and a second outlet 73 is provided on the second end plate 7: the first outlet 63 communicates with the manifold 4.

[0065] By connecting the shunt groove with the first inlet, the gas can be introduced into the shunt groove through the second inlet and the first inlet in sequence, and distributed to each flow channel for reaction. By connecting the manifold with the first outlet, the gas in the manifold can be exported through the first outlet and the second outlet in sequence.

[0066] Preferably, a fourth sealing groove 13 is further provided on the side surface of the electrode plate 1 where the flow channel 2 is opened, and the fourth sealing groove 13 is arranged around the flow channel 2. The sealing effect inside the flow channel can be improved through the fourth sealing groove provided on the electrode plate, and the performance of the battery reaction can be improved.

[0067] Preferably, a third sealing strip is further provided in the fourth sealing groove 13. The sealing effect inside the flow channel can be further improved through the third sealing strip.

[0068] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and variations can be made, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. An end plate of a fuel cell, characterized in that: Comprising: A first end plate (6) and a second end plate (7), the first end plate (6) and the second end plate (7) are joined, both the first end plate (6) and the second end plate (7) are transparent end plates, and the side surface of the first end plate (6) opposite to the second end plate (7) is joined to the electrode plate (1) of the fuel cell; On the side surface of the first end plate (6) opposite to the second end plate (7), a first cavity is formed, and / or on the side surface of the second end plate (7) opposite to the first end plate (6), a second cavity (10) is formed. An air extraction hole (11) is formed on the first end plate (6) and / or the second end plate (7), and the air extraction hole (11) communicates with the first cavity and / or the second cavity (10) so that the first cavity and / or the second cavity (10) can be evacuated through the air extraction hole (11).

2. The end plate of the fuel cell according to claim 1, characterized in that: The air extraction hole (11) is formed through the side surface of the second end plate (7) opposite to the first end plate (6) to a position communicating with the first cavity and / or the second cavity (10).

3. The end plate of the fuel cell according to claim 1, characterized in that: On the side surface of the first end plate (6) where the first cavity is formed, a first sealing groove is further formed, and the first sealing groove is arranged around the first cavity; and / or on the side surface of the second end plate (7) where the second cavity (10) is formed, a second sealing groove (71) is further formed, and the second sealing groove (71) is arranged around the second cavity (10).

4. The end plate of the fuel cell according to claim 3, characterized in that: A first sealing strip is further arranged in the first sealing groove; and / or a second sealing strip is further arranged in the second sealing groove (71).

5. The end plate of the fuel cell according to any one of claims 1-4, characterized in that: An anti-fogging coating is further applied on the side surface of the first end plate (6) joined to the electrode plate (1).

6. The end plate of the fuel cell according to claim 5, characterized in that: A third sealing groove (61) is further formed on the side surface of the first end plate (6) joined to the electrode plate, and the anti-fogging coating is applied on the inner surface of the third sealing groove.

7. The end plate of the fuel cell according to any one of claims 1-6, characterized in that: A first inlet (62) is arranged on the first end plate (6), a second inlet (72) is arranged on the second end plate (7), the first inlet (62) communicates with the second inlet (72), and gas enters the electrode plate in sequence from the second inlet (72) and the first inlet (62); A first outlet (63) is arranged on the first end plate (6), a second outlet (73) is arranged on the second end plate (7), the first outlet (63) communicates with the second outlet (73), and gas flows out of the electrode plate in sequence along the first outlet (63) and the second outlet (73).

8. The end plate of the fuel cell according to claim 7, characterized in that: The first inlet (62) and the first outlet (63) are both arranged in a way that penetrates through two side surfaces of the first end plate (6); the second inlet (72) and the second outlet (73) are both arranged in a way that penetrates through two side surfaces of the second end plate (7).

9. A fuel cell, characterized in that: The fuel cell end plate according to any one of claims 1-8 further includes a plate electrode (1) and a membrane electrode (200). One plate electrode (1) is arranged on each side of the membrane electrode (200), and one end plate (100) is arranged on the outer side of each of the two plate electrodes (1).

10. The fuel cell according to claim 9, characterized in that: At least one sunken flow channel (2) is arranged on the side surface of the plate electrode (1) opposite to the membrane electrode (200). Gas flows in the flow channel (2) and contacts the membrane electrode (200) to react, and a rib (12) is formed between two adjacent flow channels (2).

11. The fuel cell according to claim 10, characterized in that: A reinforcing rib (5) is connected between the ends of two adjacent ribs (12), and the height of the protruding reinforcing rib (5) is lower than the height of the rib; and / or, a plurality of the flow channels (2) are arranged in parallel at intervals; and / or, the flow channel (2) is a hollow structure.

12. The fuel cell according to claim 10, characterized in that: A shunt groove (3) is arranged on the plate electrode (1) at a common end of a plurality of the flow channels (2), and the shunt groove (3) is communicated with all the flow channels (2); a converging groove (4) is arranged on the plate electrode (1) at a common other end of a plurality of the flow channels (2), and the converging groove (4) is communicated with all the flow channels (2).

13. The fuel cell according to claim 12, characterized in that: When the first inlet (62) is arranged on the first end plate (6) and the second inlet (72) is arranged on the second end plate (7): the first inlet (62) is communicated with the shunt groove (3); When the first outlet (63) is arranged on the first end plate (6) and the second outlet (73) is arranged on the second end plate (7): the first outlet (63) is communicated with the converging groove (4).

14. The fuel cell according to claim 10, characterized in that: A fourth sealing groove (13) is further opened on the side surface of the plate electrode (1) where the flow channel (2) is opened, and the fourth sealing groove (13) is arranged around the flow channel (2).

15. The fuel cell according to claim 14, characterized in that: A third sealing strip is further arranged in the fourth sealing groove (13).

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