A single-board three-chamber fuel cell based on a water-gas separation structure

Abstract

The present invention relates to a single - plate three - chamber fuel cell based on a water - gas separation structure, which includes a single - plate three - chamber fuel cell bipolar plate and a membrane - electrode assembly stacked in series, and also includes two groups of oxidizing gas interfaces, a fuel gas and coolant integrated interface for the inlet and outlet of gases and liquids in the fuel cell. The oxidizing gas interfaces, the fuel gas and coolant integrated interface are arranged on the same side end - plate of the fuel cell. The oxidizing gas interfaces are connected to the oxidizing gas flow channels on the bipolar plate through the oxidizing gas channels on the end - plate. The fuel gas and coolant integrated interface separates the fuel gas and the coolant through a water - gas separation structure and then respectively connects them to the fuel gas flow channel and the coolant flow channel on the bipolar plate. Compared with the prior art, the present invention reduces the overall volume of the fuel cell, and at the same time is coordinated with the internal structure of the vehicle itself, facilitating the layout and installation on the vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and particularly to a single-board three-chamber fuel cell based on a water-gas separation structure. Background Art

[0002] A fuel cell is an energy conversion device that generates electricity by externally supplying fuel. Among them, the proton exchange membrane fuel cell (PEMFC) is a current research hotspot and a new energy power generation device with broad development prospects. It uses hydrogen as an energy source. The externally supplied hydrogen loses electrons at the anode and becomes hydrogen ions, that is, protons. The protons pass through the proton exchange membrane to reach the cathode, react with the supplied oxygen, combine with the electrons provided by the external circuit, and generate water. The electrons flow through the external circuit to generate current to supply energy. PEMFC is currently moving towards higher power density and volume / mass energy density requirements, which requires starting from two aspects: improving power generation performance and reducing volume. The former can be achieved by reducing activation polarization, ohmic polarization, mass transfer polarization, etc. This requires improving the performance of key materials such as catalysts, membranes, and bipolar plates, and ensuring the consistency of the fuel cell stack; in terms of volume, it is necessary to reduce the thickness of hardware such as bipolar plates and improve the integration.

[0003] The traditional fuel cell bipolar plate is composed of a hydrogen bipolar plate and an oxygen bipolar plate. The hydrogen flow channel and the air (oxygen) flow channel are respectively on two bipolar plates, and the two bipolar plates are cooled by a coolant (water).

[0004] Chinese Patent CN112768720A disclosed by this research group proposed a one-board three-field ultra-thin fuel cell bipolar plate and a fuel cell stack. This application uses a single bipolar plate, with one side of the bipolar plate being the anode side and the other side being the cathode side. The anode side is provided with a fuel gas flow channel and a coolant flow channel, and the cathode side is provided with an oxidation gas flow channel. In addition, it also includes a cover plate placed on the anode side for separating the coolant flow channel located in the active area from the fuel gas flow channel. Through this integrated solution, one bipolar plate is reduced, and under the same conditions, the volume of the fuel cell stack is greatly reduced, and the integration is improved, thus being beneficial to the improvement of power density.

[0005] However, the connection between the hydrogen and the coolant of this fuel cell interferes with the flow path branches in the common channel. Therefore, hydrogen and coolant are respectively introduced and discharged from both sides of the fuel cell. And the layout of the air connection does not interfere with hydrogen and coolant. This makes the hydrogen pipeline and the coolant pipeline occupy a large space during the actual power generation process of this fuel cell, which is not coordinated with the internal structure of the vehicle and is not convenient for layout and installation on the vehicle. Therefore, this problem must be solved. Summary of the Invention

[0006] The object of the present invention is to overcome the defects of the above-mentioned existing technologies and provide a single-board three-chamber fuel cell based on a water-gas separation structure, which can reduce the overall space occupied by the fuel cell, coordinate with the internal structure of the vehicle, and facilitate the layout and installation on the vehicle.

[0007] The object of the present invention can be achieved by the following technical solutions:

[0008] A single-board three-chamber fuel cell based on a water-gas separation structure, comprising a single-board three-chamber fuel cell bipolar plate and a membrane electrode assembly stacked in series, end plates are respectively provided at both ends of the fuel cell, and further comprising an oxidant gas interface, a fuel gas and coolant integrated interface. Two groups of the oxidant gas interfaces, fuel gas and coolant integrated interfaces are respectively provided for the inlet and outlet of gas and liquid in the fuel cell. The oxidant gas interfaces, fuel gas and coolant integrated interfaces are arranged on the same side end plate of the fuel cell. The oxidant gas interface communicates with the oxidant gas flow channel on the bipolar plate through the oxidant gas channel on the end plate. The fuel gas and coolant integrated interface shunts the fuel gas and coolant through a water-gas separation structure and then respectively communicates with the fuel gas flow channel and the coolant flow channel on the bipolar plate.

[0009] Preferably, the water-gas separation structure includes a water-gas shunt device independent of the outside of the end plate. Alternately distributed fuel gas channels and coolant channels are provided on the end plate. The fuel gas channels and coolant channels respectively correspond to and communicate with the alternately distributed fuel gas flow channels and coolant flow channels on the bipolar plate.

[0010] Preferably, the water-gas shunt device includes a fuel gas separation flow channel and a coolant separation flow channel arranged in sequence. The docking end of the water-gas shunt device with the fuel gas and coolant integrated interface is the first end portion, and the docking end of the water-gas shunt device with the end plate is the second end portion. Both the fuel gas separation flow channel and the coolant separation flow channel respectively penetrate from the first end portion to the second end portion of the water-gas separation device. The starting ends of the fuel gas separation flow channel and the coolant separation flow channel are staggered and separated to form two separated rows and dock with the fuel gas and coolant integrated interface. The end ends of the fuel gas separation flow channel and the coolant separation flow channel converge into one row and respectively correspond to and communicate with the alternately distributed fuel gas channels and coolant channels provided on the end plate.

[0011] Preferably, the fuel gas separation flow channel includes a straight flow channel.

[0012] Preferably, the coolant separation flow channel includes a smooth curved flow channel.

[0013] Preferably, the water-gas separation device includes fuel gas separation plates and coolant separation plates that are alternately arranged and fastened in sequence, and the fuel gas separation plates and the coolant separation plates are respectively provided with the fuel gas separation flow channels and the coolant separation flow channels.

[0014] Preferably, the water-gas separation structure is integrated on the end plate.

[0015] Preferably, the arrangement form of the water-gas separation structure integrated on the end plate includes:

[0016] The fuel gas separation flow channel and the coolant separation flow channel that penetrate from the outer side surface of the end plate to the inner side surface of the end plate are arranged on the end plate. The starting ends of the fuel gas separation flow channel and the coolant separation flow channel are staggered and separated from each other to form two separate rows and are docked with the integrated interfaces of the fuel gas and the coolant. The ends of the fuel gas separation flow channel and the coolant separation flow channel converge into one row and are correspondingly connected to the fuel gas flow channels and the coolant flow channels alternately distributed on the bipolar plate one by one.

[0017] Preferably, the fuel gas separation flow channel includes a straight flow channel perpendicular to the end plate.

[0018] Preferably, the coolant separation flow channel includes a straight flow channel inclined inside the end plate.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] (1) The fuel cell of the present invention realizes the inlet and outlet of the fuel gas and the coolant on the same side of the fuel cell based on the water-gas separation structure. At the same time, due to the arrangement of the oxidation gas interface having no interference with the fuel gas and the coolant, therefore, the design of the present invention allows the coolant, the fuel gas, and the oxidation gas to all flow in and out from one side of the fuel cell. The corresponding interfaces and pipelines are conveniently arranged on the same side, reducing the overall volume of the fuel cell, and at the same time being coordinated with the internal structure of the vehicle itself, facilitating the arrangement and installation on the vehicle.

[0021] (2) The water-gas separation structure of the present invention can be set as a separate structure independent of the end plate. The flow direction of the fuel gas flow channel does not change, and the fuel gas enters through the external fuel gas pipeline and flows linearly, which can effectively avoid the phenomenon of condensate hanging on the wall and is also convenient for humidification. The coolant flow channel is set in a smooth curved form. On the one hand, it realizes the effective separation of the fuel gas and the coolant, and at the same time the smooth curved flow channel is more conducive to flow, ensuring the smooth flow of the coolant and achieving a good cooling effect of the battery. At the same time, this separate structure is more convenient for processing;

[0022] (3) The water-gas separation structure of the present invention can be set to be integrated into the end plate. Through the design of the separated flow channels in the end plate, the fuel gas and the coolant can be introduced or exported simultaneously, thereby saving more space. Brief Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the overall structure of a single-board three-chamber fuel cell based on the water-gas separation structure in Embodiment 1 of the present invention;

[0024] Figure 2 It is a top view of the end plate in Embodiment 1 of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the water-gas shunt device in Embodiment 1 of the present invention;

[0026] Figure 4 It is Figure 3 a schematic diagram of the X-X sectional structure of the water-gas shunt device in

[0027] Figure 5 It is a schematic diagram of a possible processing scheme of the water-gas shunt device in Embodiment 1 of the present invention;

[0028] Figure 6 It is a schematic diagram of the overall structure of a single-board three-chamber fuel cell based on the water-gas separation structure in Embodiment 2 of the present invention;

[0029] Figure 7 It is a top view of the end plate in Embodiment 2 of the present invention;

[0030] Figure 8 It is Figure 7 a schematic diagram of the partial sectional structure of the end plate A-A in

[0031] In the figure, 1 is the integrated interface for fuel gas and coolant, 2 is the first seal, 3 is the water-gas shunt device, 4 is the second seal, 5 is the end plate without the integrated water-gas separation structure, 6 is the end plate with the integrated water-gas separation structure, 7 is the third seal, 8 is the oxidant gas interface, 9 is the bolt, 10 is the screw hole, 11 is the oxidant gas channel, 12 is the fuel gas channel, 13 is the coolant channel, 14 is the fuel gas separation flow channel, 15 is the coolant separation flow channel, 16 is the external oxidant gas pipeline, 17 is the external fuel gas pipeline, 18 is the external coolant pipeline, 19 is the fuel gas separation plate, 20 is the coolant separation plate, and 21 is the positioning hole. Detailed Embodiments

[0032] The present invention will be described in detail below with reference to the drawings and specific embodiments. Note that the following description of the embodiments is only illustrative in nature, and the present invention is not intended to limit the objects or uses to which it is applicable, nor is the present invention limited to the following embodiments.

[0033] Based on a one - plate three - field ultra - thin fuel cell bipolar plate and fuel cell stack proposed in Chinese Patent CN112768720A disclosed by this research group, the present invention proposes a single - plate three - cavity fuel cell based on a water - gas separation structure. It solves the problems existing in the one - plate three - field ultra - thin fuel cell bipolar plate and fuel cell stack in Chinese Patent CN112768720A, where hydrogen and coolant are respectively introduced and discharged from both sides of the fuel cell, resulting in a large volume, disharmony with the internal structure of the vehicle, and inconvenience in layout and installation on the vehicle. The following gives two specific implementation manners.

[0034] Embodiment 1

[0035] As Figure 1 shown, this embodiment provides a single - plate three - cavity fuel cell based on a water - gas separation structure, which includes a series - stacked single - plate three - cavity fuel cell bipolar plate and a membrane - electrode assembly. End plates are respectively provided at both ends of the fuel cell. It also includes an oxidant gas interface 8 and a fuel gas and coolant integrated interface 1. Two sets of oxidant gas interfaces 8 and fuel gas and coolant integrated interfaces 1 are respectively provided for the introduction and discharge of gases and liquids in the fuel cell. Among them, the oxidant gas interface 8 is provided with an external oxidant gas pipeline 16. The fuel gas and coolant integrated interface 1 integrates a fuel gas interface and a coolant interface, and is respectively docked with an external fuel gas pipeline 17 and an external coolant pipeline 18. The oxidant gas interface 8 and the fuel gas and coolant integrated interface 1 are arranged on the same side end plate of the fuel cell. The oxidant gas interface 8 is connected to the oxidant gas flow channel on the bipolar plate through the oxidant gas channel 11 on the end plate. The fuel gas and coolant integrated interface 1 shunts the fuel gas and coolant through a water - gas separation structure and then respectively connects to the fuel gas flow channel and the coolant flow channel on the bipolar plate.

[0036] With this design of the present invention, the coolant, fuel gas, and oxidant gas all flow in and out from one side of the fuel cell. The corresponding interfaces and pipelines are convenient to be arranged on the same side, reducing the overall volume of the fuel cell. At the same time, it is coordinated with the internal structure of the vehicle itself, facilitating the layout and installation on the vehicle.

[0037] In this embodiment, the water - gas separation structure adopts a water - gas shunt device 3 independent of the outside of the end plate. Alternately spaced fuel gas channels 12 and coolant channels 13 are provided on the end plate. The fuel gas channels 12 and coolant channels 13 are in one - to - one correspondence and connection with the alternately distributed fuel gas flow channels and coolant flow channels on the bipolar plate. Therefore, the end plate in this embodiment is an end plate 5 without an integrated water - gas separation structure, as Figure 2 shown.

[0038] As Figure 3As shown, the water-gas separation device 3 includes a fuel gas separation flow channel 14 and a coolant separation flow channel 15 arranged in sequence. The docking end of the water-gas separation device 3 with the fuel gas and coolant integrated interface 1 is the first end, and the end where the water-gas separation device 3 docks with the end plate is the second end. Both the fuel gas separation flow channel 14 and the coolant separation flow channel 15 penetrate from the first end of the water-gas separation device to the second end. The starting ends of the fuel gas separation flow channel 14 and the coolant separation flow channel 15 are staggered and separated to form two separated rows and dock with the fuel gas and coolant integrated interface 1. The ends of the fuel gas separation flow channel 14 and the coolant separation flow channel 15 converge into one row and are correspondingly connected in one-to-one with the fuel gas channels 12 and coolant channels 13 arranged alternately on the end plate.

[0039] As Figure 4 shown, the fuel gas separation flow channel 14 includes a straight flow channel, and the coolant separation flow channel 15 includes a smooth curved flow channel. The flow direction of the fuel gas separation flow channel 14 of the water-gas separation device 3 does not change. After the fuel gas enters from the external fuel gas pipeline 17, it flows linearly, which can effectively avoid the phenomenon of condensate hanging on the wall and is also convenient for humidification. The coolant separation flow channels 15 are smoothly connected, which is more conducive to flow.

[0040] In this embodiment, the structure of the water-gas separation device 3 is relatively complex, and it can be processed by 3D printing. Or as Figure 5 shown is a possible processing scheme of the water-gas separation device 3. The water-gas separation device 3 includes fuel gas separation plates 19 and coolant separation plates 20 arranged alternately and fastened in sequence. The fuel gas separation plates 19 and the coolant separation plates 20 are respectively provided with fuel gas separation flow channels 14 and coolant separation flow channels 15. Positioning holes 21 are added to the fuel gas separation plates 19 and the coolant separation plates 20 to facilitate assembly.

[0041] In this embodiment, when the fuel gas and coolant integrated interface 1 and the water-gas separation device 3 are assembled, they are sealed by the first seal 2. The water-gas separation device 3 and the end plate are sealed and installed by the second seal 4. The oxidation gas interface 8 is fastened to the screw hole 10 on the end plate by a bolt 9. At the same time, the oxidation gas interface 8 is sealed and installed on the end plate by the third seal 7.

[0042] It should be noted that: In Figure 1 is shown the assembly schematic diagram of the fuel gas and coolant integrated interface 1 and the oxidation gas interface 8 at one end of the end plate. This end is used as the inlet end for the oxidation gas, fuel gas, and coolant. And Figure 1On the other end of the middle end plate, only the oxidation gas channel 11, fuel gas channel 12, and coolant channel 13 are shown. At this end, the fuel gas and coolant integrated interface 1 and the oxidation gas interface 8 are also installed. The fuel gas and coolant integrated interface 1 is also connected to the end plate by the above-mentioned water-gas separation device 3, thereby forming a gas and liquid outlet end. When the fuel cell is working, when the fuel gas, oxidation gas, and coolant enter the fuel cell, they react in the fuel cell, and the remaining and waste gases are discharged through the same structure on the other side of the same end plate. Among them, the fuel gas is hydrogen, the oxidation gas is air, and the coolant can be water.

[0043] In this embodiment, the water-gas separation structure is set as a separate structure independent of the end plate. The flow direction of the fuel gas flow channel does not change. The fuel gas enters from the external fuel gas pipeline 17 and flows in a straight line, which can effectively avoid the phenomenon of condensate hanging on the wall, and at the same time is convenient for humidification. The coolant flow channel is set in a smooth curved form. On the one hand, it realizes the effective separation of the fuel gas and the coolant, and at the same time the smooth curved flow channel is more conducive to flow, ensuring the smooth flow of the coolant and achieving a good cooling effect of the battery. At the same time, this separate structure is more convenient to process.

[0044] Embodiment 2

[0045] As Figure 6 shown, this embodiment provides a single-plate three-chamber fuel cell based on a water-gas separation structure, including a single-plate three-chamber fuel cell bipolar plate and a membrane electrode assembly stacked in series. End plates are respectively provided at both ends of the fuel cell. It also includes an oxidation gas interface 8 and a fuel gas and coolant integrated interface 1. Two sets of oxidation gas interfaces 8 and fuel gas and coolant integrated interfaces 1 are respectively provided for the introduction and discharge of gas and liquid in the fuel cell. Among them, the oxidation gas interface 8 is provided with an external oxidation gas pipeline 16, and the fuel gas and coolant integrated interface 1 integrates a fuel gas interface and a coolant interface, and is respectively docked with the external oxidation gas pipeline 16 and the external fuel gas pipeline 17. The oxidation gas interface 8 and the fuel gas and coolant integrated interface 1 are arranged on the same side end plate of the fuel cell. The oxidation gas interface 8 is connected to the oxidation gas flow channel on the bipolar plate through the oxidation gas channel 11 on the end plate. The fuel gas and coolant integrated interface 1 separates the fuel gas and the coolant through the water-gas separation structure and then respectively connects them to the fuel gas flow channel and the coolant flow channel on the bipolar plate.

[0046] Different from Embodiment 1, in this embodiment, the water-gas separation structure is integrated on the end plate.

[0047] As Figure 7Shown is a schematic diagram of the end plate 6 with an integrated water-gas separation structure. The arrangement form of the water-gas separation structure integrated on the end plate includes: on the end plate, a fuel gas separation flow channel 14 and a coolant separation flow channel 15 are provided that penetrate from the outer side surface of the end plate to the inner side surface of the end plate. The starting ends of the fuel gas separation flow channel 14 and the coolant separation flow channel 15 are staggered and separated to form two separate rows and are docked with the fuel gas and coolant integrated interface 1. The ends of the fuel gas separation flow channel 14 and the coolant separation flow channel 15 converge into one row and are correspondingly connected in one-to-one correspondence with the fuel gas flow channels and coolant flow channels alternately distributed on the bipolar plate.

[0048] As Figure 8 shown, the fuel gas separation flow channel 14 includes a straight flow channel perpendicular to the end plate, and the coolant separation flow channel 15 includes a straight flow channel inclined inside the end plate.

[0049] In this embodiment, when the water-gas separation structure is integrated into the end plate, for the convenience of processing, the coolant flow channel is also straight, and the corner angle is very small, which has little impact on the flow of the coolant. At the same time, the requirements for the flow channel of the coolant are relatively low, so the modification of the hydrogen gas flow channel is avoided. The end plate has all straight flow channels, and the plate is relatively thin, which is more convenient for processing. When processing, the internal flow channel structure is given priority, and the requirements for the external shape contour are relatively low. Corresponding fillets can be made according to the processing scheme, and a radius value of 0.5 mm is recommended. At the same time, in this embodiment, since the water-gas separation structure is integrated into the end plate, more space can be saved.

[0050] The difference between this embodiment and Embodiment 1 is that the separation structure and the end plate are designed in an integrated form, and its working principle is the same as that of Embodiment 1. When the fuel cell is working, when the fuel gas, oxidation gas, and coolant enter the fuel cell, they react in the fuel cell, and the remaining and waste gases are discharged through the same structure on the other side of the same end plate.

[0051] The above embodiments are only examples and do not represent the limitation of the scope of the present invention. These embodiments can also be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the technical idea of the present invention.

Claims

1. A single-plate three-chamber fuel cell based on a water-gas separation structure, comprising a single-plate three-chamber fuel cell bipolar plate and a membrane electrode assembly stacked in series, and end plates are respectively arranged at both ends of the fuel cell, and it is characterized in that, It also includes an oxidation gas interface (8) and a fuel gas and coolant integrated interface (1). Two sets of the oxidation gas interface (8) and the fuel gas and coolant integrated interface (1) are respectively provided for the inlet and outlet of gases and liquids in the fuel cell. The oxidation gas interface (8) and the fuel gas and coolant integrated interface (1) are arranged on the same side end plate of the fuel cell. The oxidation gas interface (8) is connected to the oxidation gas flow channel on the bipolar plate through the oxidation gas channel (11) on the end plate. The fuel gas and coolant integrated interface (1) shunts the fuel gas and the coolant through a water-gas separation structure and then respectively connects them to the fuel gas flow channel and the coolant flow channel on the bipolar plate; The water-gas separation structure includes a water-gas shunting device (3) independent of the outside of the end plate. The end plate is provided with alternately distributed fuel gas channels (12) and coolant channels (13). The fuel gas channels (12) and the coolant channels (13) are respectively and correspondingly connected to the alternately distributed fuel gas flow channels and coolant flow channels on the bipolar plate; The water-gas shunting device (3) includes a fuel gas separation flow channel (14) and a coolant separation flow channel (15) arranged in sequence. The docking end of the water-gas shunting device (3) with the fuel gas and coolant integrated interface (1) is the first end, and the docking end of the water-gas shunting device (3) with the end plate is the second end. Both the fuel gas separation flow channel (14) and the coolant separation flow channel (15) respectively penetrate from the first end of the water-gas separation device to the second end. The starting ends of the fuel gas separation flow channel (14) and the coolant separation flow channel (15) are staggered and separated to form two separated rows and are docked with the fuel gas and coolant integrated interface (1). The ends of the fuel gas separation flow channel (14) and the coolant separation flow channel (15) converge into one row and are respectively and correspondingly connected to the alternately distributed fuel gas channels (12) and coolant channels (13) on the end plate; When the fuel gas and coolant integrated interface (1) and the water-gas shunting device (3) are assembled, they are sealed by a first seal (2).

2. The single-plate three-chamber fuel cell based on a water-gas separation structure according to claim 1, wherein, The fuel gas separation flow channel (14) includes a straight flow channel.

3. A single-board three-chamber fuel cell based on a water-gas separation structure according to claim 1, characterized in that The coolant separation flow channel (15) includes a smooth curved flow channel.

4. A single-board three-chamber fuel cell based on a water-gas separation structure according to claim 1, characterized in that, The water-gas shunting device (3) includes alternately arranged and fastened fuel gas separation plates (19) and coolant separation plates (20). The fuel gas separation plates (19) and the coolant separation plates (20) are respectively provided with the fuel gas separation flow channel (14) and the coolant separation flow channel (15).

5. A single - plate three - chamber fuel cell based on a water - gas separation structure, comprising a single - plate three - chamber fuel cell bipolar plate and a membrane - electrode assembly stacked in series, and end plates are respectively arranged at both ends of the fuel cell, characterized in that, It also includes an oxidation gas interface (8), and a fuel gas and coolant integrated interface (1). Two sets of the oxidation gas interface (8) and the fuel gas and coolant integrated interface (1) are respectively provided for the inflow and outflow of gases and liquids in the fuel cell. The oxidation gas interface (8) and the fuel gas and coolant integrated interface (1) are arranged on the same end plate of the fuel cell. The oxidation gas interface (8) is connected to the oxidation gas flow channel on the bipolar plate through the oxidation gas channel (11) on the end plate. The fuel gas and coolant integrated interface (1) separates the fuel gas and the coolant through a water-gas separation structure and then respectively connects them to the fuel gas flow channel and the coolant flow channel on the bipolar plate; The water-gas separation structure is integrated on the end plate; The arrangement form of the water-gas separation structure integrated on the end plate includes: A fuel gas separation flow channel (14) and a coolant separation flow channel (15) that penetrate from the outer side surface of the end plate to the inner side surface of the end plate are provided on the end plate. The starting ends of the fuel gas separation flow channel (14) and the coolant separation flow channel (15) are staggered and separated to form two separated rows and are docked with the fuel gas and coolant integrated interface (1). The ends of the fuel gas separation flow channel (14) and the coolant separation flow channel (15) converge into one row and are respectively connected in one-to-one correspondence with the fuel gas flow channel and the coolant flow channel alternately distributed on the bipolar plate; When the fuel gas and coolant integrated interface (1), the fuel gas separation flow channel (14) that penetrates from the outer side surface of the end plate to the inner side surface of the end plate, and the coolant separation flow channel (15) are assembled, they are sealed by a first seal (2).

6. The single-board three-chamber fuel cell based on a water-gas separation structure according to claim 5, wherein, The fuel gas separation flow channel (14) includes a straight flow channel perpendicular to the end plate.

7. A single-board three-chamber fuel cell based on a water-gas separation structure according to claim 5, characterized in that The coolant separation flow channel (15) includes a straight flow channel inclined inside the end plate.

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