Bipolar plate and hydrogen fuel cell stack

Abstract

The utility model provides a bipolar plate and a hydrogen fuel cell stack. The bipolar plate comprises a positive plate, a membrane electrode and a negative plate which are sequentially stacked, when being observed along the stacking direction, the bipolar plate is rectangular, one end of the bipolar plate along the length direction of the rectangle is provided with a first air outlet and a first hydrogen inlet, and the other end of the bipolar plate along the length direction of the rectangle is provided with a first hydrogen outlet and a first air inlet; the first air outlet and the first air inlet are formed in one diagonal line of the rectangle, and the first hydrogen inlet and the first hydrogen outlet are formed in the other diagonal line of the rectangle.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrogen fuel cell field especially relates to a bipolar plate and hydrogen fuel cell stack. BACKGROUND

[0002] Fuel cell has the advantage of no pollution, and is currently used in many industries. As the most core technology in fuel cell system, the performance of the stack plays a decisive role.

[0003] The utility model patent application with the publication number CN113178593A discloses a kind of stack structure of proton exchange membrane fuel cell, it adopts water cooling mode, although it can satisfy certain demand, but for some places such as vehicle, it will greatly limit the use of fuel cell. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a kind of bipolar plate and hydrogen fuel cell stack, to solve the above technical problems.

[0005] To achieve the above purpose, the utility model adopts the technical scheme as follows: a kind of bipolar plate, comprising:

[0006] Positive plate, membrane electrode and negative plate are stacked in sequence;

[0007] When observing along the stacking direction, the bipolar plate is rectangular, at the two ends of the bipolar plate along the length direction of the rectangle, one end is provided with first air outlet and first hydrogen inlet, the other end is provided with first hydrogen outlet and first air inlet, first air outlet and first air inlet are arranged on one diagonal line of the rectangle, first hydrogen inlet and first hydrogen outlet are arranged on another diagonal line of the rectangle;

[0008] First air circulation loop and second air circulation loop are respectively arranged on the side of positive plate and negative plate facing each other, and the first air circulation loop and the second air circulation loop are both curved in the shape of 'J', one end of the first air circulation loop is communicated with the first air outlet, and the other end is communicated with the first air inlet, one end of the second air circulation loop is communicated with the first hydrogen outlet, and the other end is communicated with the first hydrogen inlet.

[0009] Preferably, the positive plate and the negative plate are both made of carbon plate, and the first air circulation loop and the second air circulation loop are both arranged on the carbon plate.

[0010] Preferably, a first conductive plate is arranged on the side of the positive plate away from the membrane electrode.

[0011] Preferably, a plastic frame is provided on the side of the negative electrode plate facing away from the membrane electrode. A placement groove is formed on the plastic frame. The placement groove is hollowed out in the stacking direction. There is at least one placement groove, and a metal sponge is placed in the placement groove. The thickness of the metal sponge is equal to or slightly greater than the depth of the placement groove, and one side of the metal sponge is in contact with the negative electrode plate.

[0012] The present invention also provides a hydrogen fuel cell stack, comprising:

[0013] An upper cover plate;

[0014] A lower cover plate;

[0015] A bipolar plate, arranged between the upper cover plate and the lower cover plate. One side of the bipolar plate is the negative electrode and the other side is the positive electrode. The bipolar plate includes a positive electrode plate, a membrane electrode, and a negative electrode plate stacked in sequence;

[0016] When observed along the stacking direction, the bipolar plate is rectangular. At both ends of the bipolar plate along the length direction of the rectangle, a first air outlet and a first hydrogen inlet are provided at one end, and a first hydrogen outlet and a first air inlet are provided at the other end. The first air outlet and the first air inlet are arranged on one diagonal line of the rectangle, and the first hydrogen inlet and the first hydrogen outlet are arranged on the other diagonal line of the rectangle;

[0017] A first ventilation circuit and a second ventilation circuit are respectively provided on the sides of the positive electrode plate and the negative electrode plate facing each other. Both the first ventilation circuit and the second ventilation circuit are bent in a "U" shape. One end of the first ventilation circuit is connected to the first air outlet, and the other end is connected to the first air inlet. One end of the second ventilation circuit is connected to the first hydrogen outlet, and the other end is connected to the first hydrogen inlet.

[0018] Preferably, a second conductive plate and a third conductive plate are respectively provided at both ends of the bipolar plate. The second conductive plate is located between the bipolar plate group and the upper cover plate, and the third conductive plate is located between the lower cover plate and the bipolar plate group; A second air outlet, a first water outlet, and a second air inlet are provided on the third conductive plate. In the stacking direction, the second air outlet is aligned and connected with the first air inlet, the first water outlet is aligned and connected with the first hydrogen outlet, and the second air inlet is aligned and connected with the first air outlet.

[0019] Preferably, a humidifying assembly is further included for humidifying the air entering the first air inlet from the second air outlet, the humidifying assembly is located between the third conductive plate and the lower cover plate, the humidifying assembly includes at least one set of humidifying layers, the humidifying layers include a first humidifying layer, a diaphragm and a second humidifying layer which are stacked together in sequence, the diaphragm separates the first humidifying layer from the second humidifying layer, the used air passing through the bipolar plate can enter the second humidifying layer, the external air can enter the first humidifying layer, and the moisture in the second humidifying layer can pass through the diaphragm to enter the first humidifying layer and humidify the air in the first humidifying layer.

[0020] Preferably, a first flow-through space, a third air outlet, a second water outlet, a sixth air outlet, a fifth air inlet and a third air inlet are arranged on the first humidifying layer, the third air inlet and the first flow-through space are in communication, the third air outlet and the first flow-through space are also in communication, the external air enters the first flow-through space from the third air inlet and exits from the third air outlet; the second water outlet is aligned with and in communication with the first water outlet, and the fifth air inlet is aligned with and in communication with the second air inlet.

[0021] Preferably, a first partition plate is arranged in the first flow-through space, and the first partition plate is arranged with at least two first partition plates which are parallel to each other and each of which is provided with a notch, and the notches of the two first partition plates are arranged at opposite positions along the extension direction of the partition plate.

[0022] Preferably, a second flow-through space, a sixth air inlet, a fourth air inlet, a fourth air outlet, a third water outlet and a fifth air outlet are arranged on the second humidifying layer, the fourth air inlet and the second flow-through space are in communication, the second flow-through space is in communication with the fourth air outlet, the fourth air outlet is in communication with the outside, in the stacking direction, the fourth air inlet is aligned with the second air inlet and the first air outlet, the third water outlet is aligned with the first water outlet and the first hydrogen outlet, the fifth air outlet is aligned with and in communication with the third air outlet, the fourth air inlet is aligned with and in communication with the fifth air inlet, the sixth air inlet is aligned with and in communication with the third air inlet, and the fourth air outlet is aligned with and in communication with the sixth air outlet.

[0023] Preferably, the upper cover plate includes a cover body, a hydrogen inlet hole, a first mounting hole and a second mounting hole are arranged on the cover body, a pipe joint is arranged at the outer end of the hydrogen inlet hole, the first mounting hole is used for mounting a solenoid valve, the second mounting hole is used for mounting a pressure regulating valve, the hydrogen inlet hole is in communication with the first mounting hole and the second mounting hole, the solenoid valve can control the opening and closing of the hydrogen inlet hole, and the pressure regulating valve is used for controlling the gas pressure of hydrogen;

[0024] A hydrogen outlet hole is arranged on the upper cover plate, the hydrogen outlet hole is aligned with and communicated with the first hydrogen inlet, and hydrogen discharged from the pressure regulating valve enters the first hydrogen inlet through the hydrogen outlet hole; a hydrogen return hole is arranged on the upper cover plate, the hydrogen return hole is aligned with and communicated with the first hydrogen outlet, and the hydrogen return hole is communicated with the hydrogen inlet hole;

[0025] and / or,

[0026] The lower cover plate is provided with an eighth air inlet, a seventh air inlet, a sixth air outlet, a fourth water outlet, a drain outlet and an air pump, the air pump is arranged on the lower cover plate, and an air outlet of the air pump is communicated with the eighth air inlet; the eighth air inlet is communicated with the seventh air inlet; the seventh air inlet is aligned with and communicated with the sixth air inlet in the stacking direction; the sixth air outlet is aligned with and communicated with the fourth air outlet in the stacking direction; used air is discharged through the fifth air outlet; the fourth water outlet is aligned with and communicated with the third water outlet in the stacking direction; the drain outlet is communicated with the fourth water outlet; a drain valve is arranged at a position corresponding to the drain outlet on the lower cover plate; and drainage can be realized by controlling the opening and closing of the drain valve.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] 1) The bipolar plate of the utility model adopts metal sponge for heat dissipation, and the metal sponge is also used for electricity conduction, thereby playing a double role.

[0029] 2) The hydrogen gas of the utility model can be reused, thereby saving hydrogen gas.

[0030] 3) The utility model has a humidifying layer, part of water generated by the reaction of the electric pile is used for humidifying new air, and the humidified air is helpful for the reaction of the electric pile. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 and Figure 2 is a perspective view of the electric pile of the embodiment one of the utility model;

[0032] Figure 3 is a perspective view of the bipolar plate of the embodiment one;

[0033] Figure 4 is an enlarged view of A;

[0034] Figure 5 is a perspective view of the bipolar plate of the embodiment one from another angle;

[0035] Figure 6 is a perspective view of the bipolar plate of the embodiment one without metal sponge;

[0036] Figure 7 is a structural view of the carbon plate of the embodiment one;

[0037] Figure 8 is a structural view of the upper cover plate;

[0038] Figure 9 is a structural view of the humidifying assembly and the third conductive plate;

[0039] Figure 10 is a structural view of the humidifying assembly;

[0040] Figure 11 and Figure 12 is a structural view of the first humidifying layer;

[0041] Figure 13 and Figure 14 is a structural view of the second humidifying layer;

[0042] Figure 15 and Figure 16 is a structural view of the lower cover body. DETAILED DESCRIPTION

[0043] The following description is provided to enable any person skilled in the art to practice the present application. The preferred embodiments described below are only examples of the present application and other obvious variants can be conceived by those skilled in the art.

[0044] As shown in Figures 1-16 , a hydrogen fuel cell stack comprises an upper cover plate 1, a lower cover plate 2 and a plurality of bipolar plates 4, the plurality of bipolar plates 4 are arranged between the upper cover plate 1 and the lower cover plate 2, the plurality of bipolar plates 4 are stacked, one side of each bipolar plate 4 is a negative electrode and the other side is a positive electrode, in adjacent bipolar plates 4, the positive electrode or the negative electrode of one bipolar plate 4 contacts the negative electrode or the positive electrode of the other bipolar plate 4, that is, the plurality of bipolar plates 4 are connected in series.

[0045] Each bipolar plate 4 comprises a positive electrode plate 404, a membrane electrode 405 and a negative electrode plate 403 stacked in turn, the positive electrode plate 404 and the negative electrode plate 403 are both made of carbon plates, the membrane electrode 405 separates the positive electrode plate 404 and the negative electrode plate 403 to avoid direct contact between the positive electrode plate 404 and the negative electrode plate 403. A first conductive plate 411 is arranged on the side of the positive electrode plate 404 away from the membrane electrode 405 for conducting electricity, the first conductive plate 411 is made of metal material and plays a role of protecting the carbon plate.

[0046] On one side where the positive electrode plate 404 and the negative electrode plate 403 face each other, a ventilation circuit 410 is provided. The ventilation circuit 410 is bent in a "ji" shape to increase the circulation time of gas in the ventilation circuit 410 and improve the utilization rate of hydrogen. For the convenience of description, the ventilation circuit 410 on the positive electrode plate 404 is called the first ventilation circuit, and the ventilation circuit 410 on the negative electrode plate 403 is called the second ventilation circuit. The membrane electrode 405 can separate the ventilation circuits 410 on the positive electrode plate 404 and the negative electrode plate 403, that is, the air and hydrogen in the two ventilation circuits 410 will not come into direct contact. The membrane electrode 405 is used to make hydrogen lose electrons and become hydrogen ions. The hydrogen ions pass through the membrane electrode 405 and react with oxygen in the air to form water, realizing the transfer of charge.

[0047] The positive electrode plate 404, the membrane electrode 405, and the negative electrode plate 403 are all rectangular. When observed along the stacking direction of the two, the edges of the positive electrode plate 404 and the negative electrode plate 403 are aligned with each other. At both ends of the positive electrode plate 404, the membrane electrode 405, and the negative electrode plate 403 along the length direction, a first air outlet 406 and a first hydrogen inlet 408 are provided at one end, and a first hydrogen outlet 409 and a first air inlet 407 are provided at the other end. The first air outlet 406 and the first air inlet 407 are located on a diagonal of the rectangle, and the first hydrogen inlet 408 and the first hydrogen outlet 409 are located on the other diagonal of the rectangle. Both ends of the first ventilation circuit are respectively connected to the first air outlet 406 and the first air inlet 407, and both ends of the second ventilation circuit are respectively connected to the first hydrogen inlet 408 and the first hydrogen outlet 409. In the stacking direction of multiple bipolar plates 4, the first air outlet 406, the first air inlet 407, the first hydrogen inlet 408, and the first hydrogen outlet 409 are respectively aligned, forming four channels. For the channels corresponding to the first air inlet 407 and the first hydrogen inlet 408, only by inputting the corresponding gas at one end of the channel, the gas will enter each layer of the bipolar plate 4 simultaneously.

[0048] Preferably, a plastic frame 401 is provided on the side of the negative electrode plate 403 facing away from the membrane electrode 405. The plastic frame 401 can be fixed to the negative electrode plate 403 by glue. A placement groove is formed on the plastic frame 401. The placement groove is hollowed out in the stacking direction. There is at least one placement groove. A metal sponge 402 is placed in the placement groove. The depth of the metal sponge 402 is equivalent to the depth of the placement groove. On the one hand, the metal sponge 402 can ventilate and dissipate heat. On the other hand, it can contact the first conductive plate 411 on another bipolar plate 4 to realize the connection of the positive and negative electrodes of two adjacent bipolar plates 4.

[0049] The second conductive plate 412 is arranged between the bipolar plate group and the upper cover plate 1, and the third conductive plate 413 is arranged between the bipolar plate group and the lower cover plate 2. The second air outlet 302, the first water outlet 304 and the second air inlet 303 are arranged on the third conductive plate 413. The second air outlet 302 is aligned with the first air inlet 407, and the air from the second air outlet 302 enters the first air inlet 407. The first water outlet 304 is aligned with the first hydrogen outlet 409, and the hydrogen from the first hydrogen outlet 409 carries some water, and part of the water drops from the first water outlet 304. The second air inlet 303 is aligned with the first air outlet 406, and the used air from the first air outlet 406 enters the second air inlet 303.

[0050] The stack further comprises a humidifying assembly 3 for humidifying the air entering the first air inlet 407 from the second air outlet 302. The humidifying assembly 3 is arranged between the third conductive plate 413 and the lower cover plate 2. The humidifying assembly 3 comprises at least one humidifying layer, which comprises a first humidifying layer 305, a diaphragm and a second humidifying layer 309 arranged in sequence. The first humidifying layer 305 is provided with a first flow-through space 314, a third air outlet 311, a second water outlet 317, a sixth air outlet 320, a fifth air inlet 318 and a third air inlet 310. The third air inlet 310 and the third air outlet 311 are in communication with the first flow-through space 314. The air from the outside enters the first flow-through space 314 through the third air inlet 310 and exits through the third air outlet 311. The second water outlet 317, the fifth air inlet 318 and the sixth air outlet 320 are not in communication with the first flow-through space 314. The third air outlet 311 is aligned with and in communication with the first air inlet 407. The second water outlet 317 is aligned with and in communication with the first water outlet 304. The fifth air inlet 318 is aligned with and in communication with the second air inlet 303. The first flow-through space 314 is provided with a first partition plate 307. The first partition plate 307 is provided with a notch. The notches on the two first partition plates 307 are arranged at opposite positions to increase the air flow time in the first flow-through space 314.

[0051] The second humidification layer 309 is provided with a second flow-through space 315, a sixth air inlet 319, a fourth air inlet 312, a fourth air outlet 313, a third water outlet 318 and a fifth air outlet 316. The fourth air inlet 312 communicates with the second flow-through space 315, and the second flow-through space 315 simultaneously communicates with the fourth air outlet 313. The fourth air inlet 312 is aligned with and communicates with the second air inlet 303 and the first air outlet 406. After used air comes out of the first air outlet 406, the used air enters the second flow-through space 315 through the second air inlet 303 and the fourth air inlet 312. The used air contains moisture, and after the used air enters the second flow-through space 315, the moisture in the used air penetrates the diaphragm into the first flow-through space 314 to humidify the air entering from the outside. The humidified air enters the first air circuit, and the moisture in the air in the first air circuit penetrates into the membrane electrode 405. The moisture in the membrane electrode 405 helps the H + The used air eventually exits through the fourth air outlet 313. The third water outlet 318 is aligned with the first water outlet 304 and the first hydrogen outlet 409. Hydrogen entering the first hydrogen outlet 409 from the second air circuit contains a certain amount of moisture, and the moisture enters the third water outlet 318 under the action of gravity. The fifth air outlet 316 is aligned with and communicates with the third air outlet 311. The fourth air inlet 312 is aligned with and communicates with the fifth air inlet 318. The sixth air inlet 319 is aligned with and communicates with the third air inlet 310. The fourth air outlet 313 is aligned with and communicates with the sixth air outlet 310.

[0052] The upper cover plate 1 includes a cover body 101, a solenoid valve 103 and a pressure regulating valve 104. The cover body 101 is provided with a hydrogen inlet hole 102, a first mounting hole 105 and a second mounting hole 106. The end of the hydrogen inlet hole 102 is provided with a pipe joint. The first mounting hole 105 is used to mount the solenoid valve 103. The second mounting hole 106 is used to mount the pressure regulating valve 104. The hydrogen inlet hole 102 communicates with the first mounting hole 105 and the second mounting hole 106. The solenoid valve 103 can control the opening and closing of the hydrogen inlet hole 102. The pressure regulating valve 104 is used to control the gas pressure of hydrogen.

[0053] A hydrogen outlet hole (not shown) is arranged on the upper cover plate 1, which is aligned with and communicated with the first hydrogen inlet 408, and the hydrogen from the pressure regulating valve 104 enters the first hydrogen inlet 408 through the hydrogen outlet hole. A hydrogen return hole (not shown) is arranged on the upper cover plate 1, which is aligned with and communicated with the first hydrogen outlet 409, and the hydrogen return hole is communicated with the hydrogen inlet hole 102, so as to realize the recycling of hydrogen. Corresponding holes are arranged on the second conductive plate 412 at positions corresponding to the hydrogen outlet hole and the hydrogen return hole, so as to ensure the normal flow of hydrogen.

[0054] The lower cover plate 2 is provided with an eighth air inlet 205, a seventh air inlet 201, a sixth air outlet 202, a fourth water outlet 203, a drain outlet 204 and an air pump 206. The air pump 206 is arranged on the lower cover plate 2, and the air outlet of the air pump 206 is communicated with the eighth air inlet 205. The eighth air inlet 205 is communicated with the seventh air inlet 201. The seventh air inlet 201 is aligned with and communicated with the sixth air inlet 319 in the stacking direction. The sixth air outlet 202 is aligned with and communicated with the fourth air outlet 313 in the stacking direction. The used air is discharged through the fifth air outlet 316. The fourth water outlet 203 is aligned with and communicated with the third water outlet 318 in the stacking direction. The drain outlet 204 is communicated with the fourth water outlet 203. A drain valve (not shown) is arranged on the lower cover plate 2 at a position corresponding to the drain outlet 204. By controlling the opening and closing of the drain valve, the drainage can be realized. Since the fourth water outlet 203 is communicated with the first hydrogen outlet 409, a small amount of hydrogen will be discharged when the drain valve is opened.

[0055] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A bipolar plate, characterized by The application relates to a bipolar plate, which comprises: a positive plate, a membrane electrode and a negative plate which are stacked in sequence; when viewed along the stacking direction, the bipolar plate is rectangular, at two ends of the bipolar plate along the length direction of the rectangle, one end is provided with a first air outlet and a first hydrogen inlet, and the other end is provided with a first hydrogen outlet and a first air inlet, the first air outlet and the first air inlet are arranged on one diagonal line of the rectangle, and the first hydrogen inlet and the first hydrogen outlet are arranged on the other diagonal line of the rectangle; a first hydrogen circulation loop and a second hydrogen circulation loop are arranged on the mutually facing sides of the positive plate and the negative plate, the first hydrogen circulation loop and the second hydrogen circulation loop are both "U"-shaped, one end of the first hydrogen circulation loop is communicated with the first air outlet, and the other end is communicated with the first air inlet, one end of the second hydrogen circulation loop is communicated with the first hydrogen outlet, and the other end is communicated with the first hydrogen inlet.

2. The bipolar plate of claim 1, wherein The positive plate and the negative plate are both carbon plates, and the first hydrogen circulation loop and the second hydrogen circulation loop are arranged on the carbon plates.

3. The bipolar plate of claim 1, wherein A first conductive plate is arranged on the side of the positive plate away from the membrane electrode.

4. The bipolar plate of claim 1, wherein A plastic frame is arranged on the side of the negative plate away from the membrane electrode, a placing groove is formed on the plastic frame, the placing groove is hollow in the stacking direction, the placing groove has at least one, a metal sponge is placed in the placing groove, the thickness of the metal sponge is equal to or greater than the depth of the placing groove, and one side of the metal sponge is in contact with the negative plate.

5. A hydrogen fuel cell stack characterized by, The application relates to a bipolar plate, which comprises: an upper cover plate; a lower cover plate; the bipolar plate is arranged between the upper cover plate and the lower cover plate, one side of the bipolar plate is a negative electrode, and the other side is a positive electrode, the bipolar plate comprises a positive plate, a membrane electrode and a negative plate which are stacked in sequence; when viewed along the stacking direction, the bipolar plate is rectangular, at two ends of the bipolar plate along the length direction of the rectangle, one end is provided with a first air outlet and a first hydrogen inlet, and the other end is provided with a first hydrogen outlet and a first air inlet, the first air outlet and the first air inlet are arranged on one diagonal line of the rectangle, and the first hydrogen inlet and the first hydrogen outlet are arranged on the other diagonal line of the rectangle; a first hydrogen circulation loop and a second hydrogen circulation loop are arranged on the mutually facing sides of the positive plate and the negative plate, the first hydrogen circulation loop and the second hydrogen circulation loop are both "U"-shaped, one end of the first hydrogen circulation loop is communicated with the first air outlet, and the other end is communicated with the first air inlet, one end of the second hydrogen circulation loop is communicated with the first hydrogen outlet, and the other end is communicated with the first hydrogen inlet.

6. A hydrogen fuel cell stack according to claim 5, wherein A second conductive plate and a third conductive plate are arranged at two ends of the bipolar plate, the second conductive plate is arranged between the bipolar plate group and the upper cover plate, and the third conductive plate is arranged between the lower cover plate and the bipolar plate group; a second air outlet, a first water outlet and a second air inlet are arranged on the third conductive plate, and the second air outlet is aligned with and communicated with the first air inlet, the first water outlet is aligned with and communicated with the first hydrogen outlet, and the second air inlet is aligned with and communicated with the first air outlet.

7. A hydrogen fuel cell stack according to claim 6, wherein The humidifying assembly is arranged between the third conductive plate and the lower cover plate, and comprises at least one set of humidifying layers, the humidifying layers comprising a first humidifying layer, a diaphragm and a second humidifying layer arranged in sequence, the diaphragm separating the first humidifying layer from the second humidifying layer, used air passing through the bipolar plate entering the second humidifying layer, external air entering the first humidifying layer, and moisture in the second humidifying layer entering the first humidifying layer through the diaphragm to humidify air in the first humidifying layer.

8. A hydrogen fuel cell stack according to claim 7, wherein The first humidifying layer is provided with a first flow-through space, a third air outlet, a second water outlet, a sixth air outlet, a fifth air inlet and a third air inlet, the third air inlet and the first flow-through space being in communication, the third air outlet and the first flow-through space being in communication, external air entering the first flow-through space from the third air inlet and exiting from the third air outlet. The second water outlet is aligned with and in communication with the first water outlet, and the fifth air inlet is aligned with and in communication with the second air inlet.

9. A hydrogen fuel cell stack according to claim 8, wherein, The first flow-through space is provided with first partitions, at least two first partitions being arranged in parallel, and each first partition being provided with a notch, the notches of the two first partitions being arranged at opposite positions along the extension direction of the partitions.

10. A hydrogen fuel cell stack according to claim 9, wherein, The second humidifying layer is provided with a second flow-through space, a sixth air inlet, a fourth air inlet, a fourth air outlet, a third water outlet and a fifth air outlet, the fourth air inlet and the second flow-through space being in communication, the second flow-through space and the fourth air outlet being in communication, the fourth air outlet being in communication with the outside, in the stacking direction, the fourth air inlet being aligned with the second air inlet and the first air outlet, the third water outlet being aligned with the first water outlet and the first hydrogen outlet, the fifth air outlet being aligned with and in communication with the third air outlet, the fourth air inlet being aligned with and in communication with the fifth air inlet, the sixth air inlet being aligned with and in communication with the third air inlet, and the fourth air outlet being aligned with and in communication with the sixth air outlet.

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