Water electrolysis device

Abstract

The utility model discloses a water electrolysis device, and relates to the technical field of water electrolysis, the water electrolysis device comprises an electrolysis reactor core structure, an anode end plate structure and a cathode end plate structure, the electrolysis reactor core structure, the anode end plate structure and the cathode end plate structure are laminated, the electrolytic reactor core structure is located between the anode end plate structure and the cathode end plate structure, the anode end plate structure comprises an anode end plate and an anode manifold plate which are arranged in a stacked mode, the anode manifold plate is located on the side, facing the electrolytic reactor core structure, of the anode end plate, a first flow channel is formed in the anode manifold plate, and the first flow channel communicates with the electrolytic reactor core structure; the cathode end plate structure comprises a cathode end plate and a cathode manifold plate which are arranged in a stacked mode, the cathode manifold plate is located on the side, facing the electrolysis reactor core structure, of the cathode end plate, a second flow channel is formed in the cathode manifold plate, and the second flow channel communicates with the electrolysis reactor core structure. Therefore, the structural strength and rigidity of the anode end plate and the cathode end plate can be improved, so that the performance of the water electrolysis device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water electrolysis, and in particular to a water electrolysis device. Background Art

[0002] In related technologies, proton exchange membrane electrolytic water hydrogen production (PEM electrolyzer) technology is an advanced hydrogen production technology with a fast response speed, which can quickly adjust the hydrogen production to meet different demands. However, the structural strength and stiffness of the anode end plate and the cathode end plate of the existing PEM water electrolyzer are insufficient, thus affecting the performance of the PEM water electrolyzer. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a water electrolysis device, which can improve the structural strength and stiffness of the anode end plate and the cathode end plate, so as to improve the performance of the water electrolysis device, and can also improve the economy of the water electrolysis device.

[0004] The water electrolysis device according to an embodiment of the utility model includes: an electrolytic stack core structure for electrolyzing water; an anode end plate structure and a cathode end plate structure. The electrolytic stack core structure, the anode end plate structure and the cathode end plate structure are stacked, and the electrolytic stack core structure is located between the anode end plate structure and the cathode end plate structure. The anode end plate structure includes a stacked anode end plate and an anode manifold plate. The anode manifold plate is located on the side of the anode end plate facing the electrolytic stack core structure, and the anode manifold plate is formed with a first flow channel which is communicated with the electrolytic stack core structure.

[0005] The cathode end plate structure includes a stacked cathode end plate and a cathode manifold plate. The cathode manifold plate is located on the side of the cathode end plate facing the electrolytic stack core structure, and the cathode manifold plate is formed with a second flow channel which is communicated with the electrolytic stack core structure.

[0006] The water electrolysis device according to an embodiment of the utility model can improve the structural strength and stiffness of the anode end plate and the cathode end plate by providing an anode manifold plate in the anode end plate structure and a cathode manifold plate in the cathode end plate structure, and respectively forming a first flow channel in the anode manifold plate and a second flow channel in the cathode manifold plate, so as to improve the performance of the water electrolysis device, and can also improve the economy of the water electrolysis device.

[0007] In some embodiments of the utility model, the first flow channel includes a medium inlet flow channel and a medium outlet flow channel, and both the medium inlet flow channel and the medium outlet flow channel are communicated with the electrolytic stack core structure.

[0008] In some embodiments of the utility model, a protective layer is provided on the inner wall of the medium inlet flow channel and / or the inner wall of the medium outlet flow channel.

[0009] In some embodiments of the present utility model, a purge flow channel is further formed in the cathode manifold plate, and the electrolysis stack core structure communicates with the purge flow channel and the second flow channel.

[0010] In some embodiments of the present utility model, the water electrolysis device further includes: a fastener. A first assembly groove is formed in the side wall of the anode end plate structure, and a second assembly groove corresponding to the first assembly groove is formed in the side wall of the cathode end plate structure. Along the arrangement direction of the anode end plate structure and the cathode end plate structure, the first assembly groove penetrates through the anode end plate structure, the second assembly groove penetrates through the cathode end plate structure, and the orthographic projection of the electrolysis stack core structure is located inside the first assembly groove and inside the second assembly groove; the fastener is inserted through the first assembly groove and the second assembly groove to fix the electrolysis stack core structure, the anode end plate structure, and the cathode end plate structure.

[0011] In some embodiments of the present utility model, both the first assembly groove and the second assembly groove are multiple. The multiple first assembly grooves are arranged along the circumferential direction of the anode end plate structure, the multiple second assembly grooves are arranged along the circumferential direction of the cathode end plate structure, and the multiple first assembly grooves and the multiple second assembly grooves correspond to each other one by one.

[0012] In some embodiments of the present utility model, a positioning groove is formed in the side wall of the anode end plate structure and / or the side wall of the cathode end plate structure, and the positioning groove is used for positioning the electrolysis stack core structure.

[0013] In some embodiments of the present utility model, positioning grooves are formed in both the side wall of the anode end plate structure and the side wall of the cathode end plate structure, and the positioning groove of the anode end plate structure and the positioning groove of the cathode end plate structure correspond to each other. Along the arrangement direction of the anode end plate structure and the cathode end plate structure, the positioning groove of the anode end plate structure penetrates through the anode end plate structure, the positioning groove of the cathode end plate structure penetrates through the cathode end plate structure, and the orthographic projection of the electrolysis stack core structure is located inside the positioning groove.

[0014] In some embodiments of the present utility model, the water electrolysis device further includes: a first insulating plate and a second insulating plate. The first insulating plate is disposed between the anode end plate structure and the electrolysis stack core structure, and the second insulating plate is disposed between the cathode end plate structure and the electrolysis stack core structure.

[0015] In some embodiments of the present utility model, along the arrangement direction of the anode end plate structure and the cathode end plate structure, first positioning structures are formed on both sides of the first insulating plate, and second positioning structures for positioning and cooperating with the corresponding first positioning structures are formed on both the anode end plate structure and the electrolysis stack core structure; and / or

[0016] Third positioning structures are formed on both sides of the second insulating plate, and fourth positioning structures for positioning and cooperating with the corresponding third positioning structures are formed on both the cathode end plate structure and the electrolysis stack core structure.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is the front view of the water electrolysis device according to the embodiment of the present utility model;

[0020] Figure 2 is Figure 1 the sectional view taken along A-A in

[0021] Figure 3 is Figure 1 the sectional view taken along B-B in

[0022] Figure 4 is the top view of the water electrolysis device according to the embodiment of the present utility model;

[0023] Figure 5 is Figure 4 the sectional view taken along C-C in

[0024] Figure 6 is Figure 4 the sectional view taken along D-D in

[0025] Reference Numerals:

[0026] Water electrolysis device 100;

[0027] Electrolysis stack core structure 10; Current collector plate 11; Stack core 12;

[0028] Anode end plate structure 20; Anode end plate 201; Anode manifold plate 202; Medium inlet flow channel 203; Medium outlet flow channel 204; Water inlet manifold port 205; Oxygen outlet manifold port 206; Oxygen collection pipeline 207;

[0029] First assembly groove 21;

[0030] Cathode end plate structure 30; Cathode end plate 301; Cathode manifold plate 302; Purge flow channel 303; Second flow channel 304; Hydrogen outlet manifold port 305; Purge manifold port 306; Hydrogen collection pipeline 307;

[0031] Second assembly groove 31;

[0032] Positioning groove 40;

[0033] First insulating plate 50; First positioning structure 51; Second positioning structure 52;

[0034] Second insulating plate 60; Third positioning structure 61; Fourth positioning structure 62;

[0035] Fastener 70; Disc spring assembly 71. Detailed implementation mode

[0036] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the 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 by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0037] Refer to the following Figures 1-6 Describe a water electrolysis device 100 according to an embodiment of the present invention, including: an electrolysis stack core structure 10 for electrolyzing water; an anode end plate structure 20 and a cathode end plate structure 30. The electrolysis stack core structure 10, the anode end plate structure 20 and the cathode end plate structure 30 are stacked, and the electrolysis stack core structure 10 is located between the anode end plate structure 20 and the cathode end plate structure 30. The anode end plate structure 20 includes an anode end plate 201 and an anode manifold plate 202 stacked. The anode manifold plate 202 is located on the side of the anode end plate 201 facing the electrolysis stack core structure 10, and the anode manifold plate 202 is formed with a first flow channel communicating with the electrolysis stack core structure 10.

[0038] The cathode end plate structure 30 includes a cathode end plate 301 and a cathode manifold plate 302 stacked. The cathode manifold plate 302 is located on the side of the cathode end plate 301 facing the electrolysis stack core structure 10, and the cathode manifold plate 302 is formed with a second flow channel communicating with the electrolysis stack core structure 10.

[0039] Among them, as Figure 1As shown, the water electrolysis device 100 includes: an electrolysis stack core structure 10, an anode end plate structure 20, a cathode end plate structure 30, and fasteners 70. The electrolysis stack core structure 10 may include: a current collector plate 11 and a stack core 12. The stack core 12 includes a plurality of electrolysis cells, and each electrolysis cell may be composed of a bipolar plate, a proton exchange membrane, a catalyst layer, a gas diffusion layer, etc. The electrolysis stack core structure 10 is used for electrolyzing water. Specifically, the anode end plate structure 20 may have an anode connection point, and the anode connection point is connected to the positive electrode of an external power supply. The cathode end plate structure 30 may have a cathode connection point, and the cathode connection point is connected to the negative electrode of the external power supply. And on the side of the anode end plate structure 20 and the cathode end plate structure 30 facing the electrolysis stack core structure 10, a current collector plate 11 is provided. The current collector plate 11 is used to evenly distribute the external current to the electrolysis cells to stably drive the water electrolysis reaction. When water enters the electrolysis stack core structure 10, it can be electrolyzed into oxygen and hydrogen. (Water is decomposed into oxygen and hydrogen in the electrolysis stack core structure 10 due to the decomposition of the catalyst layer. Oxygen is discharged from the anode side, and hydrogen passes through the proton exchange membrane and is discharged to the cathode side.) Oxygen is collected and discharged through the flow channels on the bipolar plate on the anode side, and hydrogen is collected and discharged through the flow channels on the cathode bipolar plate.

[0040] The electrolysis stack core structure 10, the anode end plate structure 20, and the cathode end plate structure 30 are stacked, and the electrolysis stack core structure 10 is located between the anode end plate structure 20 and the cathode end plate structure 30, so that the anode end plate structure 20 and the cathode end plate structure 30 play a supporting role for the electrolysis stack core structure 10. And such a layout is compact, occupies a small space, and is convenient for installation and maintenance.

[0041] The positive end plate structure 20 includes a stacked positive end plate 201 and a positive manifold plate 202. Both the positive end plate 201 and the positive manifold plate 202 can be made of metal materials. For example, the positive end plate 201 can be made of aluminum alloy material, and the positive manifold plate 202 can be made of stainless steel material. The positive end plate 201 and the positive manifold plate 202 are stacked, and the positive end plate 201 and the positive manifold plate 202 can be interference-fitted through positioning pins to firmly connect the positive end plate 201 and the positive manifold plate 202. The positive manifold plate 202 is located on the side of the positive end plate 201 facing the electrolysis stack core structure 10. The positive manifold plate 202 can be formed with a first flow channel. Therefore, there is no need to form a first flow channel on the positive end plate 201. The aluminum alloy material has a low density, high strength, and low price, while the stainless steel material has higher strength and a relatively high price. Therefore, by stacking the positive end plate 201 and the positive manifold plate 202 and forming a first flow channel on the positive manifold plate 202, the structural strength and stiffness of the positive end plate 201 are improved, so that the tightening force during the tightening of the water electrolysis device 100 can be evenly distributed to the positive end plate structure 20 and the electrolysis stack core structure 10, reducing the risk of uneven stress on the positive end plate structure 20 and the electrolysis stack core structure 10, improving the performance of the water electrolysis device 100, and also enhancing the economy of the water electrolysis device 100.

[0042] The first flow channel communicates with the electrolysis stack core structure 10. Specifically, an oxygen flow channel is provided in the electrolysis stack core structure 10, and the first flow channel communicates with the oxygen flow channel. The positive manifold plate 202 can be formed with a water inlet manifold port 205 communicating with the first flow channel, and the positive manifold plate 202 can also be formed with an oxygen outlet manifold port 206 communicating with the first flow channel. When water enters the electrolysis stack core structure 10 through the water inlet manifold port 205 and the first flow channel and is electrolyzed, oxygen and hydrogen are generated. The oxygen and the undissolved water are discharged from the water electrolysis device 100 in sequence through the oxygen flow channel, the first flow channel, and the oxygen outlet manifold port 206. A oxygen collection pipeline 207 can be connected to the oxygen outlet manifold port 206 to facilitate the subsequent storage, utilization, or treatment of oxygen. With such a setting, it can be ensured that the oxygen generated in the electrolysis stack core structure 10 can be safely and efficiently discharged from the water electrolysis device 100.

[0043] The cathode end plate structure 30 includes a cathode end plate 301 and a cathode manifold plate 302 arranged in a stacked manner. Both the cathode end plate 301 and the cathode manifold plate 302 can be made of metal materials. For example, the cathode end plate 301 can be made of aluminum alloy material, and the cathode manifold plate 302 can be made of stainless steel material. The cathode end plate 301 and the cathode manifold plate 302 are arranged in a stacked manner, and the cathode end plate 301 and the cathode manifold plate 302 can be firmly connected by interference fit of positioning pins. The cathode manifold plate 302 is located on the side of the cathode end plate 301 facing the electrolytic stack core structure 10. The cathode manifold plate 302 is formed with a second flow channel. Therefore, there is no need to form a second flow channel 304 on the cathode end plate 301. The aluminum alloy material has a low density, high strength, and low price, while the stainless steel material has higher strength and relatively higher price. Therefore, stacking the cathode end plate 301 and the cathode manifold plate 302 and forming a second flow channel 304 on the cathode manifold plate 302 not only improves the structural strength and stiffness of the cathode end plate 301, so that the tightening force during the tightening of the water electrolysis device 100 can be evenly distributed to the cathode end plate structure 30 and the electrolytic stack core structure 10, reducing the risk of uneven stress on the cathode end plate structure 30 and the electrolytic stack core structure 10, but also improves the performance of the water electrolysis device 100 and the economy of the water electrolysis device 100.

[0044] The second flow channel communicates with the electrolytic stack core structure 10. Specifically, there is a hydrogen flow channel in the electrolytic stack core structure 10, and the hydrogen flow channel communicates with the second flow channel 304. The cathode manifold plate 302 can also be formed with a hydrogen outlet manifold port 305 communicating with the second flow channel 304, so that the hydrogen generated in the electrolytic stack core structure 10 can flow out of the water electrolysis device 100 in sequence through the hydrogen flow channel, the second flow channel 304, and the hydrogen outlet manifold port 305. A hydrogen collection pipeline 307 can be connected to the hydrogen outlet manifold port 305 to facilitate the subsequent storage, utilization, or treatment of hydrogen. With such a setting, it can ensure that the hydrogen generated in the electrolytic stack core structure 10 can be safely and efficiently exported from the water electrolysis device 100.

[0045] According to the water electrolysis device 100 of the embodiment of the present invention, by providing an anode manifold plate 202 in the anode end plate structure 20 and a cathode manifold plate 302 in the cathode end plate structure 30, and respectively forming a first flow channel in the anode manifold plate 202 and a second flow channel 304 in the cathode manifold plate 302, the structural strength and stiffness of the anode end plate 201 and the cathode end plate 301 can be improved, so as to improve the performance of the water electrolysis device 100, and the economy of the water electrolysis device 100 can also be improved.

[0046] In some embodiments of the present invention, such as Figure 1 and Figure 2As shown, the first flow channel includes a medium inlet flow channel 203 and a medium outlet flow channel 204, and both the medium inlet flow channel 203 and the medium outlet flow channel 204 are connected to the electrolysis stack core structure 10.

[0047] Among them, an oxygen flow channel is provided in the electrolysis stack core structure 10. The oxygen flow channel is connected to the first flow channel. The first flow channel includes a medium inlet flow channel 203 and a medium outlet flow channel 204, and both the medium inlet flow channel 203 and the medium outlet flow channel 204 are connected to the electrolysis stack core structure 10. Specifically, both the medium inlet flow channel 203 and the medium outlet flow channel 204 can be connected to the oxygen flow channel. The anode manifold plate 202 can be formed with a water inlet manifold port 205 connected to the medium inlet flow channel 203, and the anode manifold plate 202 can also be formed with an oxygen outlet manifold port 206 connected to the medium outlet flow channel 204. When water enters the electrolysis stack core structure 10 from the water inlet manifold port 205 and the medium inlet flow channel 203 and is electrolyzed, oxygen and hydrogen will be generated. The oxygen and the undissociated water are discharged from the electrolysis device 100 in sequence through the oxygen flow channel, the medium outlet flow channel 204, and the oxygen outlet manifold port 206. A oxygen collection pipeline 207 can be connected to the oxygen outlet manifold port 206 to facilitate the subsequent storage, utilization or treatment of oxygen. With such a setting, it can be ensured that the oxygen generated in the electrolysis stack core structure 10 can be safely and efficiently exported from the electrolysis device 100.

[0048] In some embodiments of the present invention, a protective layer is provided on the inner wall of the medium inlet flow channel 203 and / or the inner wall of the medium outlet flow channel 204.

[0049] Among them, a protective layer can be provided on the inner wall of the medium inlet flow channel 203, or a protective layer can be provided on the inner wall of the medium outlet flow channel 204, or protective layers can be provided on both the inner wall of the medium inlet flow channel 203 and the inner wall of the medium outlet flow channel 204. In this application, the case where protective layers are provided on both the inner wall of the medium inlet flow channel 203 and the inner wall of the medium outlet flow channel 204 is taken as an example for illustration. The protective layer can be made of acid-resistant and corrosion-resistant materials. For example, the protective layer can be made of polytetrafluoroethylene material. Polytetrafluoroethylene has extremely strong chemical stability, is acid-resistant, alkali-resistant, and resistant to various organic solvents, and is almost insoluble in all solvents. By providing protective layers on both the inner wall of the medium inlet flow channel 203 and the inner wall of the medium outlet flow channel 204, an effective protective effect can be achieved on the inner walls of the medium inlet flow channel 203 and the medium outlet flow channel 204. For example, the protective layer can effectively resist acidic water and prevent the inner walls of the flow channel 203 and the medium outlet flow channel 204 from being corroded and blackened by water, ensuring the long-term stable operation of the electrolysis device 100 and also effectively extending the service life of the electrolysis device 100.

[0050] In some embodiments of the present invention, such as Figure 3As shown, the cathode manifold plate 302 may be formed with a purge flow channel 303, and the electrolysis stack core structure 10 communicates with the purge flow channel 303 and the second flow channel 304.

[0051] Among them, the cathode manifold plate 302 may be formed with a purge flow channel 303, and the cathode manifold plate 302 may also be formed with a purge manifold port 306 communicating with the purge flow channel 303. The electrolysis stack core structure 10 communicates with the purge flow channel 303 and the second flow channel 304. Before the long-term shutdown or initial startup of the water electrolysis device 100, impurities may remain in the hydrogen flow channel and the second flow channel 304 within the electrolysis stack core structure 10. Therefore, before starting the water electrolysis device 100, nitrogen can be blown into the purge flow channel 303 through the purge manifold port 306 first, so as to be able to purge the hydrogen flow channel on the electrolysis stack core structure 10 and the second flow channel 304 to remove impurities. After the nitrogen purge is completed, the purge manifold port 306 is sealed, thereby effectively improving the electrolysis efficiency and safety.

[0052] It can be explained that nitrogen, as an inert gas, will not chemically react with the materials in the electrolysis stack core structure 10. At the same time, it has good fluidity and can effectively purge the residues in the hydrogen flow channel and the second flow channel 304 within the electrolysis stack core structure 10, ensuring that the hydrogen flow channel and the second flow channel 304 within the electrolysis stack core structure 10 are in a clean and dry state before startup, thus providing a strong guarantee for the smooth progress of the water electrolysis process.

[0053] In some embodiments of the present invention, as Figures 1-3 shown, the water electrolysis device 100 may further include: a fastener 70. A first assembly groove 21 is formed on the side wall of the anode end plate structure 20, and a second assembly groove 31 corresponding to the first assembly groove 21 is formed on the side wall of the cathode end plate structure 30. Along the arrangement direction of the anode end plate structure 20 and the cathode end plate structure 30, the first assembly groove 21 penetrates through the anode end plate structure 20, the second assembly groove 31 penetrates through the cathode end plate structure 30, and the orthographic projection of the electrolysis stack core structure 10 is located inside the first assembly groove 21 and inside the second assembly groove 31. The fastener 70 passes through the first assembly groove 21 and the second assembly groove 31 to fix the electrolysis stack core structure 10, the anode end plate structure 20, and the cathode end plate structure 30.

[0054] Among them, the fastener 70 can be a bolt. A first assembly groove 21 is formed on the side wall of the positive end plate structure 20. The first assembly groove 21 can be configured as an arc-shaped open groove with an arc-shaped bottom wall. A second assembly groove 31 corresponding to the first assembly groove 21 is formed on the side wall of the negative end plate structure 30. The second assembly groove 31 can be configured as an arc-shaped open groove with an arc-shaped bottom wall. The first assembly groove 21 and the second assembly groove 31 can have the same shape, and the first assembly groove 21 and the second assembly groove 31 are arranged correspondingly. Along the arrangement direction of the positive end plate structure 20 and the negative end plate structure 30, the first assembly groove 21 penetrates through the positive end plate structure 20, and the second assembly groove 31 penetrates through the negative end plate structure 30, and the orthographic projection of the electrolytic stack core structure 10 is located inside the first assembly groove 21 and inside the second assembly groove 31. When the fastener 70 penetrates through the first assembly groove 21 and the second assembly groove 31, the fastener 70 is located at the outer edge of the electrolytic stack core structure 10 and abuts against the outer edge of the electrolytic stack core structure 10, which not only provides positioning, fastening and supporting functions for the electrolytic stack core structure 10, but also can ensure the stability and sealing performance of the entire water electrolysis device 100. It can be explained that the fastener 70 can be structures such as bolts and nuts. The fastener 70 can be provided with a disc spring assembly 71 for pre-tightening the fastener 70, effectively reducing the risk of loosening of the fastener 70 under vibration or alternating loads, and thus can effectively improve the safety and reliability of the water electrolysis device 100.

[0055] Specifically, when the electrolytic stack core structure 10, the positive end plate structure 20 and the negative end plate structure 30 are stacked according to the design requirements, the first assembly groove 21 and the second assembly groove 31 will be aligned one by one to form a continuous channel, and the continuous channel is arranged around the electrolytic stack core structure 10 along the circumferential direction of the electrolytic stack core structure 10. When the fastener 70 penetrates through the first assembly groove 21 and the second assembly groove 31, the tightening force of the fastener 70 is adjusted. During the tightening process, the fastener 70 can abut against the edge of the electrolytic stack core structure 10, and the fastener 70 can clamp the electrolytic stack core structure 10 so that the electrolytic stack core structure 10, the positive end plate structure 20 and the negative end plate structure 30 are fixed, thereby improving the connection strength between the electrolytic stack core structure 10, the positive end plate structure 20 and the negative end plate structure 30. It not only ensures the stability of the electrolytic stack core structure 10, but also improves the sealing performance of the entire water electrolysis device 100 through the close fit between the fastener 70 and the first assembly groove 21 and the second assembly groove 31, preventing gas or liquid leakage.

[0056] Moreover, the fact that both the first assembly groove 21 and the second assembly groove 31 are configured as arc-shaped open grooves also has flexibility, which can reduce the installation difficulty caused by angular deviation, and can also reduce the stress and friction generated during the installation process, helping to protect the fastener 70 and the installation surface from damage, and thus being able to reduce the installation difficulty of the fastener 70 and improve the success rate of installing the fastener 70.

[0057] In some embodiments of the present utility model, such as Figures 1-3 As shown, both the first assembly groove 21 and the second assembly groove 31 can be multiple. The multiple first assembly grooves 21 are arranged circumferentially along the anode end plate structure 20, the multiple second assembly grooves 31 are arranged circumferentially along the cathode end plate structure 30, and the multiple first assembly grooves 21 and the multiple second assembly grooves 31 correspond to each other one by one.

[0058] Among them, both the first assembly groove 21 and the second assembly groove 31 can be multiple. For example: both the first assembly groove 21 and the second assembly groove 31 can be two, three, four, five, etc. in number, but the present utility model is not limited thereto, and there can also be other numbers of the first assembly groove 21 and the second assembly groove 31, as long as both the first assembly groove 21 and the second assembly groove 31 can be multiple. As an example of the present application, both the first assembly groove 21 and the second assembly groove 31 can be ten. The multiple first assembly grooves 21 are arranged circumferentially along the anode end plate structure 20, the multiple second assembly grooves 31 are arranged circumferentially along the cathode end plate structure 30, and the multiple first assembly grooves 21 and the multiple second assembly grooves 31 correspond to each other one by one. When each fastener 70 is inserted through the corresponding first assembly groove 21 and the corresponding second assembly groove 31 and tightened, a clamping force can be generated circumferentially on the electrolytic stack core structure 10, thereby further improving the connection strength between the electrolytic stack core structure 10, the anode end plate structure 20, and the cathode end plate structure 30. This not only further ensures the stability of the electrolytic stack core structure 10, but also further improves the sealing performance of the entire water electrolysis device 100 through the close fit between the fastener 70 and the first assembly groove 21 and the second assembly groove 31, preventing gas or liquid leakage.

[0059] In some embodiments of the present utility model, such as Figures 2-3 As shown, a positioning groove 40 is formed on the side wall of the anode end plate structure 20 and / or the side wall of the cathode end plate structure 30, and the positioning groove 40 is used to position the electrolytic stack core structure 10.

[0060] Among them, the side wall of the anode end plate structure 20 can form the positioning groove 40, or the side wall of the cathode end plate structure 30 can form the positioning groove 40, or both the side wall of the anode end plate structure 20 and the side wall of the cathode end plate structure 30 can form the positioning groove 40. In this application, the case where both the side wall of the anode end plate structure 20 and the side wall of the cathode end plate structure 30 form the positioning groove 40 is taken as an example for illustration. The positioning groove 40 can be configured as a rectangular open groove with a flat bottom wall, and a positioning member can be installed in the positioning groove 40 to position the electrolytic stack core structure 10. The geometric shape of the rectangular open groove is simple and clear, which can provide an accurate positioning reference to ensure the accurate position of the electrolytic stack core structure 10 in the water electrolysis device 100.

[0061] In some embodiments of the present utility model, such as Figures 2-3As shown, positioning grooves 40 can be formed on the side walls of the positive end plate structure 20 and the side walls of the negative end plate structure 30, and the positioning grooves 40 of the positive end plate structure 20 correspond to the positioning grooves 40 of the negative end plate structure 30. Along the arrangement direction of the positive end plate structure 20 and the negative end plate structure 30, the positioning groove 40 of the positive end plate structure 20 penetrates through the positive end plate structure 20, and the positioning groove 40 of the negative end plate structure 30 penetrates through the negative end plate structure 30, and the orthographic projection of the electrolysis stack core structure 10 is located inside the positioning groove 40.

[0062] Specifically, when the electrolysis stack core structure 10, the positive end plate structure 20, and the negative end plate structure 30 are stacked according to the design requirements, the positioning grooves 40 of the positive end plate structure 20 and the corresponding positioning grooves 40 of the negative end plate structure 30 will be aligned one by one to form a continuous channel. When the positioning member is inserted into the positioning groove 40 of the positive end plate structure 20 and the corresponding positioning groove 40 of the negative end plate structure 30, it can play the role of external positioning, eliminating the need for internal positioning by opening holes in the bipolar plates and frames in the electrolysis stack core structure 10, reducing the manufacturing difficulty of the bipolar plates and frames, reducing material waste, and reducing the installation difficulty of the positioning member. After positioning, it can also reduce the difficulty of pulling out the positioning member and reduce the risk of the positioning member scratching the inside of the electrolysis stack core structure 10.

[0063] Further, after the positioning member is pulled out, the fastener 70 is installed in the positioning groove 40 to further fasten the water electrolysis device 100, thereby further improving the safety and reliability of the water electrolysis device 100.

[0064] In some embodiments of the present invention, as Figure 1 shown, the water electrolysis device 100 further includes: a first insulating plate 50 and a second insulating plate 60. The first insulating plate 50 is disposed between the positive end plate structure 20 and the electrolysis stack core structure 10, and the second insulating plate 60 is disposed between the negative end plate structure 30 and the electrolysis stack core structure 10.

[0065] Wherein, both the first insulating plate 50 and the second insulating plate 60 are made of insulating materials. For example: both the first insulating plate 50 and the second insulating plate 60 can be made of insulating materials such as epoxy resin materials and plastic materials. Specific limitations are not made here, as long as both the first insulating plate 50 and the second insulating plate 60 have an insulating effect.

[0066] The first insulating plate 50 is disposed between the positive end plate structure 20 and the electrolysis stack core structure 10, and the second insulating plate 60 is disposed between the negative end plate structure 30 and the electrolysis stack core structure 10. Both the first insulating plate 50 and the second insulating plate 60 play a role of isolation and insulation, which can effectively avoid safety hazards such as short circuits and electric shocks, ensure the smooth progress of the electrolysis process, protect the safety of equipment and personnel, and thus improve the safety and reliability of the water electrolysis device 100.

[0067] In some embodiments of the present utility model, such as Figures 5-6 shown, along the arrangement direction of the positive end plate structure 20 and the negative end plate structure 30, first positioning structures 51 are formed on both sides of the first insulating plate 50, and second positioning structures 52 that are in positioning cooperation with the corresponding first positioning structures 51 are formed on both the positive end plate structure 20 and the electrolysis stack core structure 10; and / or

[0068] Third positioning structures 61 are formed on both sides of the second insulating plate 60, and fourth positioning structures 62 that are in positioning cooperation with the corresponding third positioning structures 61 are formed on both the negative end plate structure 30 and the electrolysis stack core structure 10.

[0069] Among them, as an embodiment of the present application, along the arrangement direction of the positive end plate structure 20 and the negative end plate structure 30, first positioning structures 51 are formed on both sides of the first insulating plate 50, and second positioning structures 52 that are in positioning cooperation with the corresponding first positioning structures 51 are formed on both the positive end plate structure 20 and the electrolysis stack core structure 10.

[0070] As an embodiment of the present application, third positioning structures 61 are formed on both sides of the second insulating plate 60, and fourth positioning structures 62 that are in positioning cooperation with the corresponding third positioning structures 61 are formed on both the negative end plate structure 30 and the electrolysis stack core structure 10.

[0071] As an embodiment of the present application, along the arrangement direction of the positive end plate structure 20 and the negative end plate structure 30, first positioning structures 51 are formed on both sides of the first insulating plate 50. The positive end plate structure 20 and the electrolysis stack core structure 10 are both formed with second positioning structures 52 that are in positioning cooperation with the corresponding first positioning structures 51. And third positioning structures 61 are formed on both sides of the second insulating plate 60. The negative end plate structure 30 and the electrolysis stack core structure 10 are both formed with fourth positioning structures 62 that are in positioning cooperation with the corresponding third positioning structures 61. The present application will be described by taking this embodiment as an example. Specifically, the first positioning structure 51 can be configured as a positioning boss, and the corresponding second positioning structure 52 can be configured as a positioning hole. The positioning boss is adapted to the positioning hole. Along the arrangement direction of the positive end plate structure 20 and the negative end plate structure 30, the positioning bosses on both sides of the first insulating plate 50 are respectively inserted into the second positioning structures 52 of the positive end plate structure 20 and the second positioning structures 52 of the electrolysis stack core structure 10, so that the first positioning structure 51 is in positioning cooperation with the second positioning structure 52, thereby realizing the precise positioning and fixing of the first insulating plate 50 and the electrolysis stack core structure 10. The third positioning structure 61 can also be configured as a positioning boss, and the corresponding fourth positioning structure 62 can also be configured as a positioning hole. The positioning boss is adapted to the positioning hole. Along the arrangement direction of the positive end plate structure 20 and the negative end plate structure 30, the positioning bosses on both sides of the second insulating plate 60 are respectively inserted into the fourth positioning structures 62 of the negative end plate structure 30 and the fourth positioning structures 62 of the electrolysis stack core structure 10, so that the third positioning structure 61 is in positioning cooperation with the fourth positioning structure 62, thereby realizing the precise positioning and fixing of the second insulating plate 60 and the electrolysis stack core structure 10, and further improving the stability and reliability of the water electrolysis device 100.

[0072] It can be explained that the second positioning structure 52 of the electrolysis stack core structure 10 can be arranged on the current collector plate 11 close to the positive end plate structure 20, thereby reducing the risk of deviation of the first insulating plate 50 and the anode-side current collector plate 11. The fourth positioning structure 62 of the electrolysis stack core structure 10 can be arranged on the current collector plate 11 close to the negative end plate structure 30, reducing the risk of deviation of the second insulating plate 60 and the cathode-side current collector plate 11.

[0073] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0074] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A water electrolysis device, characterized in that: include: An electrolysis core structure (10), wherein the electrolysis core structure (10) is used for electrolyzing water; an anode end plate structure (20) and a cathode end plate structure (30), wherein the electrolysis core structure (10), the anode end plate structure (20) and the cathode end plate structure (30) are stacked, and the electrolysis core structure (10) is located between the anode end plate structure (20) and the cathode end plate structure (30); The anode end plate structure (20) comprises an anode end plate (201) and an anode manifold plate (202) which are stacked, the anode manifold plate (202) being located on a side of the anode end plate (201) facing the electrolysis core structure (10), and the anode manifold plate (202) is formed with a first flow channel, the first flow channel being in communication with the electrolysis core structure (10); The cathode end plate structure (30) comprises a cathode end plate (301) and a cathode manifold plate (302) which are stacked, wherein the cathode manifold plate (302) is located on a side of the cathode end plate (301) facing the electrolysis core structure (10), and the cathode manifold plate (302) is formed with a second flow channel which is connected to the electrolysis core structure (10).

2. The water electrolysis device according to claim 1, characterized in that: The first flow channel comprises a medium inlet flow channel (203) and a medium outlet flow channel (204), and both the medium inlet flow channel (203) and the medium outlet flow channel (204) are connected to the electrolysis core structure (10).

3. The water electrolysis device according to claim 2, characterized in that: The inner wall of the medium inlet flow channel (203) and / or the inner wall of the medium outlet flow channel (204) are provided with a protective layer.

4. The water electrolysis device according to claim 1, characterized in that: The cathode manifold plate (302) is also formed with a purge flow channel (303), and the electrolysis core structure (10) is connected to the purge flow channel (303) and the second flow channel (304).

5. The water electrolysis device according to claim 1, characterized in that: Also includes: Fastener (70), A first assembly groove (21) is formed on the side wall of the anode end plate structure (20), and a second assembly groove (31) corresponding to the first assembly groove (21) is formed on the side wall of the cathode end plate structure (30); along the arrangement direction of the anode end plate structure (20) and the cathode end plate structure (30), the first assembly groove (21) passes through the anode end plate structure (20), and the second assembly groove (31) passes through the cathode end plate structure (30); and the orthographic projection of the electrolytic core structure (10) is located on the inner side of the first assembly groove (21) and the inner side of the second assembly groove (31); The fastener (70) is inserted into the first assembly groove (21) and the second assembly groove (31) to fix the electrolytic core structure (10), the anode end plate structure (20) and the cathode end plate structure (30).

6. The water electrolysis device according to claim 5, characterized in that: There are multiple first assembly grooves (21) and multiple second assembly grooves (31), and the multiple first assembly grooves (21) are arranged along the circumference of the anode end plate structure (20), and the multiple second assembly grooves (31) are arranged along the circumference of the cathode end plate structure (30). The multiple first assembly grooves (21) and the multiple second assembly grooves (31) correspond one to one.

7. The water electrolysis device according to claim 5, characterized in that: A positioning groove (40) is formed on the side wall of the anode end plate structure (20) and / or the side wall of the cathode end plate structure (30), and the positioning groove (40) is used to position the electrolytic core structure (10).

8. The water electrolysis device according to claim 7, characterized in that: The side walls of the anode end plate structure (20) and the side walls of the cathode end plate structure (30) are both formed with the positioning groove (40), and the positioning groove (40) of the anode end plate structure (20) corresponds to the positioning groove (40) of the cathode end plate structure (30). Along the arrangement direction of the anode end plate structure (20) and the cathode end plate structure (30), the positioning groove (40) of the anode end plate structure (20) passes through the anode end plate structure (20), and the positioning groove (40) of the cathode end plate structure (30) passes through the cathode end plate structure (30), and the orthographic projection of the electrolytic core structure (10) is located on the inner side of the positioning groove (40).

9. The water electrolysis device according to any one of claims 1 to 8, characterized in that: Also includes: A first insulating plate (50) and a second insulating plate (60), wherein the first insulating plate (50) is arranged between the anode end plate structure (20) and the electrolysis core structure (10), and the second insulating plate (60) is arranged between the cathode end plate structure (30) and the electrolysis core structure (10).

10. The water electrolysis device according to claim 9, characterized in that: Along the arrangement direction of the anode end plate structure (20) and the cathode end plate structure (30), first positioning structures (51) are formed on both sides of the first insulating plate (50), and the anode end plate structure (20) and the electrolytic core structure (10) are both formed with second positioning structures (52) that are positioned and matched with the corresponding first positioning structures (51); and / or A third positioning structure (61) is formed on both sides of the second insulating plate (60), and the cathode end plate structure (30) and the electrolytic core structure (10) are both formed with a fourth positioning structure (62) that is positioned and matched with the corresponding third positioning structure (61).

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