A fuel cell stack, a fuel cell stack with a dummy membrane electrode assembly, and a vehicle

Abstract

The application discloses a fuel cell stack false membrane electrode assembly, a fuel cell stack and a vehicle, and relates to the technical field of fuel cell stacks. The fuel cell stack false membrane electrode assembly comprises a frame, the middle area of the frame has a containing space, and a carbon paper is arranged on the containing space and fixed with the frame. The carbon paper is configured as a non-woven fiber cloth layer obtained by impregnating, drying and sintering PTFE solution, and the electric resistance of the carbon paper is 20-100 ohms. The fuel cell stack false membrane electrode assembly of the embodiment can generate more heat in the power generation process of the fuel cell stack by increasing the electric resistance of the carbon paper, so that the single battery close to the current collecting plate can be heated, thereby improving the voltage of the single battery. In the process of the bench test of the fuel cell stack, the single battery does not need to be heated by connecting an external power source with a resistance wire, so that the redundancy of the bench test system is small.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, and in particular to a dummy membrane electrode assembly for a fuel cell stack, a fuel cell, and a vehicle. Background Technology

[0002] In existing technologies, the temperature of the current collector at the outermost end of the fuel cell stack is relatively low, which affects the temperature of adjacent individual cells. This results in the voltage of individual cells closer to the outer current collector being lower than that of individual cells on the inner side, leading to poor overall stability of the fuel cell stack. Furthermore, during bench testing of fuel cell stacks, resistance wires are typically added inside the upper and lower end plates of the stack, and these resistance wires are preheated by an external power source. This makes the bench testing process of fuel cell stacks complex, and the bench testing system has high system redundancy, indicating room for improvement. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a dummy membrane electrode assembly for a fuel cell stack, which improves the heating efficiency of the dummy cell to heat adjacent individual cells, thereby increasing the voltage of the corresponding individual cells.

[0004] A dummy membrane electrode assembly for a fuel cell stack according to an embodiment of the present invention includes: a frame having a accommodating space in the middle region of the frame; and carbon paper disposed on the accommodating space and fixed to the frame. The carbon paper is constructed as a non-woven fiber cloth layer obtained by impregnation, drying, and sintering with PTFE solution, and the resistivity of the carbon paper is 20Ω-100Ω.

[0005] According to an embodiment of the present invention, the dummy membrane electrode assembly of the fuel cell stack increases the resistance of the carbon paper, so that the dummy membrane electrode assembly can generate more heat during the power generation process of the fuel cell stack to heat the individual cells near the current collector, thereby increasing the voltage of the individual cells. Furthermore, during the bench test of the fuel cell stack, it is not necessary to use an external power supply for heating via resistance wire, thus reducing the redundancy of the bench test system.

[0006] According to some embodiments of the present invention, in the dummy membrane electrode assembly of a fuel cell stack, the surface resistance of the nonwoven fiber cloth layer is ≥100mΩ / cm2.

[0007] According to some embodiments of the present invention, the dummy membrane electrode assembly of the fuel cell stack has a fiber diameter of 10μm-14μm in the non-woven fiber material.

[0008] According to some embodiments of the present invention, in a dummy membrane electrode assembly for a fuel cell stack, the density of the fiber material is 25 g / cm³. 2 -35g / cm 2 .

[0009] According to some embodiments of the present invention, in a dummy membrane electrode assembly for a fuel cell stack, the carbon paper is a first carbon paper located on one side of a frame and a second carbon paper located on the other side of the frame. The first carbon paper and the second carbon paper are disposed opposite to each other, and the circumferential edges of the first carbon paper and the second carbon paper are both fixed to the frame.

[0010] The present invention also proposes a fuel cell stack.

[0011] According to an embodiment of the present invention, a fuel cell stack includes: a first current collector and a second current collector located at both ends of the fuel cell stack; a first dummy cell located between the first current collector and a single cell; and a second dummy cell located between the second current collector and a single cell; wherein both the first dummy cell and the second dummy cell have a dummy membrane electrode assembly as described in any of the above embodiments.

[0012] According to some embodiments of the present invention, the first dummy cell includes: a first dummy bipolar plate adjacent to the first current collector and a second dummy bipolar plate away from the first current collector, and the dummy membrane electrode assembly disposed between the first dummy bipolar plate and the second dummy bipolar plate; wherein the hydrogen inlet, hydrogen outlet, air inlet and air outlet of the first dummy bipolar plate are all blocked, and the air inlet and air outlet of the second dummy bipolar plate are blocked.

[0013] According to some embodiments of the fuel cell stack of the present invention, the second dummy cell includes: a first dummy bipolar plate adjacent to the second current collector and a third dummy bipolar plate away from the second current collector, and a dummy membrane electrode assembly disposed between the first dummy bipolar plate and the third dummy bipolar plate; wherein the hydrogen inlet, hydrogen outlet, air inlet and air outlet of the first dummy bipolar plate are all blocked, and the hydrogen inlet and hydrogen outlet of the third dummy bipolar plate are blocked.

[0014] According to some embodiments of the fuel cell stack of the present invention, the resistivity of the dummy membrane electrode assembly is 1.5 Ω / cm. 2 -30Ω / cm 2 .

[0015] The present invention also proposes a vehicle.

[0016] The vehicle according to an embodiment of the present invention is equipped with a fuel cell stack as described in any of the above embodiments.

[0017] The advantages that the vehicle and the fuel cell stack have over the prior art are the same, and will not be repeated here.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the structure of a dummy membrane electrode assembly for a fuel cell stack according to an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 Sectional view at point AA.

[0022] Figure label:

[0023] 100 dummy membrane electrode assembly

[0024] Border 1, Carbon Paper 2, First Carbon Paper 21, Second Carbon Paper 22

[0025] Hydrogen inlet manifold 3, hydrogen exhaust manifold 4, air inlet manifold 5, air exhaust manifold 6, internal positioning hole 7, coolant drain manifold 8, coolant inlet manifold 9. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The following is for reference. Figures 1-2 A dummy membrane electrode assembly 100 for a fuel cell stack according to an embodiment of the present invention is described.

[0028] It should be noted that the fuel cell stack is the main component of the power unit of a hydrogen energy device, and the bipolar plates and MEA (membrane electrode assembly) constitute the basic power generation unit (i.e., a single cell). To eliminate the "two-end effect" of the fuel cell stack (i.e., the voltage of the single cells at both ends is lower than the voltage of the single cells at other locations), dummy cells (including dummy bipolar plates and MEAs) need to be installed at both ends of the fuel cell stack.

[0029] To supply current to an external load, current collectors are required at both ends of the fuel cell stack. To ensure the stack's insulation performance, an insulating plate is needed between the current collectors and end plates. Therefore, ensuring proper fit between the current collectors, end plates, and dummy cells is crucial for the entire fuel cell stack.

[0030] It should also be noted that during the use of fuel cell stacks (including daily use and bench testing), the voltage of individual cells closer to the current collector is always lower than the voltage of individual cells in other locations. Based on this, this application proposes a dummy membrane electrode assembly 100.

[0031] like Figure 1 As shown, the dummy membrane electrode assembly 100 of the fuel cell stack in this embodiment of the invention includes: a frame 1 and carbon paper 2.

[0032] like Figure 1 As shown, the frame 1 is constructed as a rectangular plate structure. The middle area of ​​the frame 1 has a rectangular through hole that runs through the thickness direction to create an accommodating space. The carbon paper 2 is placed in the accommodating space. The frame 1 is used to support the carbon paper 2. It can be understood that the carbon paper 2 is part of the membrane electrode assembly. The dummy membrane electrode assembly 100 consists of a proton exchange membrane (not shown in the figure) located on the innermost side, an anode catalyst layer (not shown in the figure) and a cathode catalyst layer (not shown in the figure) located on both sides of the proton exchange membrane, and a gas diffusion layer located outside the anode catalyst layer and the cathode catalyst layer.

[0033] The gas diffusion layer is the carbon paper 2 of this application, which defines a gas diffusion channel within the carbon paper 2.

[0034] It should be noted that the frame 1 is made of a high-temperature resistant material, specifically PEN (polyethylene naphthalate), to ensure that the frame 1 remains stable when the fuel cell stack generates electricity and heat, thus ensuring that the fuel cell stack can work normally.

[0035] The carbon paper 2 is constructed from a non-woven fiber cloth layer obtained by impregnation, drying, and sintering with a PTFE (polytetrafluoroethylene) solution, and its resistivity is 20Ω-100Ω. In other words, a carbon paper 2 with good toughness and deformation resistance is constructed using a non-woven fiber material (i.e., non-woven fabric). Based on the carbon paper 2 constructed from the non-woven fiber material, a PTFE solution with a concentration >50% is used for impregnation, drying, and sintering to form a hydrophobic PTFE coating on the carbon paper 2. This improves the resistivity of the carbon paper 2 without affecting its diffusion channels. It should be noted that the non-woven fiber material can be glass fiber.

[0036] It is understandable that electrons are generated through the anodic reaction and flow from the anode to the cathode through the external circuit. In this process, the electrons need to flow through the diffusion channel of carbon paper 2, which can be regarded as current flowing through carbon paper 2. By increasing the resistance of carbon paper 2, the heat generated by the dummy battery during operation is increased, so that the dummy battery can heat the adjacent single cells and increase the temperature of the single cells located at the outermost end of the fuel cell stack.

[0037] The dummy membrane electrode assembly 100 of the fuel cell stack in this embodiment of the invention uses a non-woven fiber cloth layer obtained by impregnation, drying and sintering with PTFE solution as carbon paper 2. This can increase the resistance of the carbon paper 2, so that during the operation of the fuel cell stack, the heat generated by the dummy membrane electrode assembly 100 can heat the adjacent single cells, thereby preventing the voltage of the single cells located at the end from being lower than the voltage of the single cells located at other positions, thus improving the working stability of the fuel cell stack. At the same time, when the fuel cell stack is subjected to bench testing, it is not necessary to set resistance wires on the end plates of the stack to preheat the single cells located at the end, which improves the convenience of bench testing and eliminates the system redundancy of the bench testing system.

[0038] In some embodiments, the surface resistance of the non-woven fiber cloth layer is ≥100mΩ / cm2.

[0039] The surface resistance of the fiber material of the initially selected non-woven limiting cloth layer is >10kΩ / cm2. After PTFE impregnation and sintering of the non-woven fiber cloth layer, the surface resistance of the non-woven fiber cloth layer can reach a level greater than 100mΩ / cm2, so as to reduce the thickness of carbon paper 2 required to achieve the target resistance, thereby reducing the processing difficulty and cost, and making the thickness of the dummy film electrode assembly 100 even lower, which correspondingly reduces the deformation generated during the stack pressing process.

[0040] In some embodiments, the fiber diameter of the non-woven fiber material is 10μm-14μm. That is, the fiber diameter of the non-woven fiber material can be 11μm, 12μm, or 13μm. With the above settings, the non-woven fiber material is easy to construct into carbon paper 2, and has good toughness and deformation resistance. During the press-fitting process of the fuel cell stack, the structural deformation of the carbon paper 2 is small, thus having good performance.

[0041] In some embodiments, the density of the fiber material is 25 g / cm³. 2 -35g / cm 2 In other words, the fiber density of the fiber material can be taken as 28 g / cm³. 2 Or take it as 30g / cm 2 Alternatively, it can be taken as 30g / cm 2 Through the above settings, the overall weight of carbon paper 2 is reduced, thereby reducing the weight of the dummy membrane electrode assembly 100 and realizing the lightweight design of the fuel cell stack.

[0042] In some embodiments, such as Figure 2 As shown, carbon paper 2 has a first carbon paper 21 on one side of the frame 1 and a second carbon paper 22 on the other side of the frame 1. The first carbon paper 21 and the second carbon paper 22 are arranged opposite to each other, and the circumferential edges of the first carbon paper 21 and the second carbon paper 22 are both fixed to the frame 1.

[0043] In other words, the first carbon paper 21 and the second carbon paper 22 are respectively disposed on both sides of the frame 1, so that the first carbon paper 21, the anode catalyst layer, the proton exchange membrane, the cathode catalyst layer and the second carbon paper 22 are sequentially installed in the accommodating space. The first carbon paper 21 and the second carbon paper 22 are respectively disposed on both sides of the proton exchange membrane. At the same time, the first carbon paper 21 and the second carbon paper 22 are respectively glued and fixed to the frame 1 on both sides of the frame 1 to improve the structural stability and structural strength of the dummy membrane electrode assembly 100.

[0044] The present invention also proposes a fuel cell stack.

[0045] According to an embodiment of the present invention, a fuel cell stack includes: a first current collector and a second current collector located at both ends of the fuel cell stack, a first dummy cell located between the first current collector and a single cell, and a second dummy cell located between the second current collector and a single cell, wherein both the first dummy cell and the second dummy cell have a dummy membrane electrode assembly 100 of any of the above embodiments.

[0046] The overall structure of the fuel cell stack consists of, from one end to the other, the following components arranged sequentially: a metal end plate, an insulating plate, a first current collector, a first dummy cell, multiple stacked individual cells, a second dummy cell, a second current collector, an insulating plate, and a metal end plate.

[0047] It should be noted that the manifold is used to centrally supply hydrogen and air to the fuel cell stack, as well as centrally discharge coolant. The fuel cell stack is equipped with multiple manifolds, and the frame 1 is located on both sides of the accommodating space and is respectively equipped with: hydrogen inlet manifold 3, hydrogen exhaust manifold 4, air inlet manifold 5, air exhaust manifold 6, coolant drain manifold 8, and coolant inlet manifold 9. The manifolds are positioned by the inner positioning holes 7, so that the multiple manifolds are set one-to-one with the manifold ports of the frame 1, so that the manifold can be connected to multiple bipolar plates at the same time to realize hydrogen inlet, hydrogen exhaust, air inlet, air exhaust, coolant drain, and coolant inlet of the individual cells.

[0048] Understandably, when the fuel cell stack is working, hydrogen and oxygen are introduced through inlets and distributed to the bipolar plates of each individual cell via current collectors. The current is then evenly distributed to the electrodes via the bipolar plates to carry out electrochemical reactions. Due to the continuous flow of gas and coolant, the temperature of the current collectors remains relatively low.

[0049] The above configuration allows the first and second dummy batteries to separate the individual cells from the first and second current collectors. Simultaneously, the dummy membrane electrode assembly 100, which has a higher resistance in both the first and second dummy batteries, increases the heat generated by the dummy batteries when supplying power to the fuel cell stack. This allows the first dummy battery to heat the individual cells near the first current collector, and the second dummy battery to heat the individual cells near the second current collector. This reduces the cooling effect of the second and second current collectors on the individual cells, increases the voltage of the corresponding individual cells, and makes the voltages of multiple individual cells tend to be equal, thereby improving the performance of the fuel cell stack.

[0050] In some embodiments, the first dummy battery includes: a first dummy bipolar plate, a second dummy bipolar plate, and a dummy membrane electrode assembly 100. The dummy membrane electrode assembly 100 is mounted between the first and second dummy bipolar plates, with the first dummy bipolar plate mounted on the side of the dummy membrane electrode assembly 100 closer to the first current collector, and the second dummy bipolar plate mounted on the side of the dummy membrane electrode assembly 100 furthest from the first current collector.

[0051] It should be noted that the side of the first dummy bipolar plate furthest from the dummy membrane electrode assembly 100 is attached to the first current collector. By sealing the hydrogen inlet, hydrogen outlet, air inlet, and air outlet of the first dummy bipolar plate, oxygen and hydrogen are prevented from flowing to the first current collector and accumulating inside the fuel cell stack, thus improving the safety of the fuel cell stack. Simultaneously, the second dummy bipolar plate is installed on the anode side of an adjacent cell. The second dummy bipolar plate, the membrane electrode assembly, and the bipolar plate together form a cell close to the first current collector. By sealing the air inlet and air outlet of the second dummy bipolar plate, only hydrogen can flow to the anode of the cell, ensuring the normal operation of the cell.

[0052] In some embodiments, the second dummy battery includes: a first dummy bipolar plate, a third dummy bipolar plate, and a dummy membrane electrode assembly 100. The dummy membrane electrode assembly 100 is installed between the first and third dummy bipolar plates, with the first dummy bipolar plate installed on the side of the dummy membrane electrode assembly 100 closer to the second current collector, and the third dummy bipolar plate installed on the side of the dummy membrane electrode assembly 100 farther from the second current collector. The hydrogen inlet, hydrogen outlet, air inlet, and air outlet of the first dummy bipolar plate are all sealed, as are the hydrogen inlet and hydrogen outlet of the third dummy bipolar plate.

[0053] It should be noted that the side of the first dummy bipolar plate furthest from the dummy membrane electrode assembly 100 is attached to the second current collector. By sealing the hydrogen inlet, hydrogen outlet, air inlet, and air outlet of the first dummy bipolar plate, oxygen and hydrogen are prevented from flowing to the second current collector and accumulating inside the fuel cell stack, thus improving the safety of the fuel cell stack. Simultaneously, the third dummy bipolar plate is installed on the cathode side of the adjacent single cell. The third dummy bipolar plate, the membrane electrode assembly, and the bipolar plate together construct a single cell close to the second current collector. By sealing the hydrogen inlet and hydrogen outlet of the third dummy bipolar plate, air can flow to the cathode of the single cell, ensuring the normal operation of the single cell.

[0054] It should be emphasized that non-woven fiber materials have low mechanical strength, and the thickness of the dummy membrane electrode assembly 100 changes significantly during the assembly and clamping of the fuel cell stack, posing a risk of leakage. By improving the sealing performance of the first, second, and third dummy bipolar plates on the side facing the dummy membrane electrode assembly 100, such as by increasing the thickness of the sealing element, leakage can be avoided.

[0055] In some embodiments, the resistivity of the dummy membrane electrode assembly 100 is 1.5 Ω / cm. 2 -30Ω / cm 2 In the specific setup process, it is necessary to reasonably set the resistivity according to the membrane electrode assembly used in different types of fuel cell stacks, so that the resistivity of the dummy membrane electrode assembly 100 is 2-20 times that of the original dummy membrane electrode assembly 100, and ensures that the resistivity of the dummy membrane electrode assembly 100 is not less than 1.5Ω / cm. 2 The maximum value is no more than 30Ω / cm 2 Specifically, if the resistivity of a certain model of the original dummy membrane electrode assembly 100 is 0.5Ω / cm... 2 The resistivity can be set to 1.6 Ω / cm. 2 Alternatively, it can be taken as 5.0Ω / cm. 2 Alternatively, it can be taken as 9.0Ω / cm. 2 .

[0056] The present invention also proposes a vehicle.

[0057] A vehicle according to an embodiment of the present invention includes a fuel cell stack according to any of the above embodiments. By providing a first dummy battery and a second dummy battery to separate individual cells from the first current collector and the second current collector, and by providing a dummy membrane electrode assembly 100 with a large resistance in the first dummy battery and the second dummy battery, the heat generated by the dummy battery when supplying power to the fuel cell stack is increased. This allows the first dummy battery to heat the individual cells near the first current collector, and the second dummy battery to heat the individual cells near the second current collector, thereby reducing the cooling effect of the second current collector and the second current collector on the individual cells, increasing the voltage of the corresponding individual cells, making the voltages of multiple individual cells tend to be equal, improving the performance of the fuel cell stack, and thus improving the overall performance of the vehicle.

[0058] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0059] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0060] In the description of this invention, "a plurality of" means two or more.

[0061] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0062] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0064] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A gas diffusion electrode assembly (100) of a fuel cell stack, characterized by, It comprises: a frame (1), the middle area of the frame (1) has a containing space; carbon paper (2) is arranged on the containing space and fixed with the frame (1), the carbon paper (2) is configured as a non-woven fiber cloth layer obtained by impregnating, drying and sintering PTFE solution, and the resistance of the carbon paper (2) is 20Ω-100Ω; Wherein, the carbon paper (2) is impregnated, dried and sintered by PTFE solution with concentration > 50%, to generate PTFE coating with good hydrophobicity at the carbon paper (2), and improve the resistance of the carbon paper (2) without affecting the diffusion channel of the carbon paper (2); The dummy membrane electrode assembly (100) is configured to generate heat in the power generation process of the fuel cell stack, to heat the single cell close to the current collector plate, so as to improve the voltage of the single cell, and the heat generated by the dummy membrane electrode assembly (100) is used to heat the adjacent single cell, so as to avoid that the voltage of the single cell at the end is lower than that of the single cell at other positions, and improve the working stability of the fuel cell stack.

2. The fuel cell stack's false membrane electrode assembly (100) according to claim 1, characterized in that The surface resistance of the non-woven fiber cloth layer is ≥100mΩ / cm2.

3. The fuel cell stack's false membrane electrode assembly (100) according to claim 2, characterized in that The fiber diameter of the non-woven fiber material is 10μm-14μm.

4. The fuel cell stack's false membrane electrode assembly (100) according to claim 1, characterized by The density of the fibrous material is 25 g / cm 2 - 35 g / cm 2 .

5. The fuel cell stack's MEA (100) according to any one of claims 1 to 4, characterized in that The carbon paper (2) is a first carbon paper (21) located on one side of the frame (1) and a second carbon paper (22) located on the other side of the frame (1), the first carbon paper (21) and the second carbon paper (22) are oppositely arranged, and the circumferential edge of the first carbon paper (21) and the circumferential edge of the second carbon paper (22) are fixed with the frame (1).

6. A fuel cell stack characterized by It comprises: a first current collector plate and a second current collector plate located at both ends of the fuel cell stack; a first dummy cell between the first current collector plate and the single cell; a second dummy cell between the second current collector plate and the single cell; Wherein The first dummy cell and the second dummy cell both have the dummy membrane electrode assembly (100) of any one of claims 1-5.

7. The fuel cell stack of claim 6, wherein The first dummy cell comprises: a first dummy bipolar plate close to the first current collector plate and a second dummy bipolar plate away from the first current collector plate, and the dummy membrane electrode assembly (100) arranged between the first dummy bipolar plate and the second dummy bipolar plate; wherein The hydrogen inlet, hydrogen outlet, air inlet and air outlet of the first dummy bipolar plate are blocked, and the air inlet and air outlet of the second dummy bipolar plate are blocked.

8. The fuel cell stack of claim 6, wherein The second dummy cell comprises: a first dummy bipolar plate close to the second current collector plate and a third dummy bipolar plate away from the second current collector plate, and the dummy membrane electrode assembly (100) arranged between the first dummy bipolar plate and the third dummy bipolar plate; wherein The hydrogen inlet, hydrogen outlet, air inlet and air outlet of the first dummy bipolar plate are blocked, and the hydrogen inlet and hydrogen outlet of the third dummy bipolar plate are blocked.

9. The fuel cell stack according to any one of claims 6 to 8, characterized by The resistivity of the pseudo-membrane electrode assembly (100) is 1.5 Ω / cm 2 - 30 Ω / cm 2 .

10. A vehicle characterized by comprising: It comprises: The fuel cell stack of any one of claims 6-9.

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