A sealing structure for high-pressure PEM electrolyzer hydrogen production

Abstract

The utility model provides a sealing structure for high-pressure PEM electrolyzer hydrogen production, comprising an anode side sealing structure, a cathode side sealing structure, a cathode bipolar plate, an anode bipolar plate and a membrane electrode, wherein the anode side sealing structure and the cathode side sealing structure are staggeredly installed, the anode side sealing structure is installed between the anode bipolar plate and the membrane electrode, the cathode side sealing structure is installed between the cathode bipolar plate and the membrane electrode, and the anode bipolar plate and the cathode bipolar plate are rectangular structures; the utility model has the beneficial effects of: adopting a multi-stage sealing structure, which can better meet the high-pressure sealing requirements of the electrolyzer, the cathode side adopts a first cathode seal and a second cathode seal to form a double hydrogen cavity sealing structure, which is more conducive to the sealing of high-pressure hydrogen, and at the same time, the anode side adopts a first anode seal and a second anode seal to form a double oxygen cavity sealing structure, which is more conducive to the sealing of high-pressure oxygen.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolyzer sealing devices, in particular to a sealing structure for high-pressure PEM electrolyzer hydrogen production. Background Art

[0002] Proton exchange membrane (PEM) water electrolysis hydrogen production technology is very suitable for the power generation input of fluctuating renewable energy such as wind, light, and water. The PEM electrolyzer produces hydrogen and oxygen by electrolyzing water. At the same time, PEM water electrolysis hydrogen production is also a complex system that includes complex multi-field coupling effects such as electrochemistry, thermal, fluid mechanics, and structural mechanics. Therefore, high requirements are placed on the sealing reliability of the electrolyzer. The sealing design is directly related to the safety, reliability, and durability of the electrolyzer. Therefore, the research on the sealing problem of the electrolyzer is particularly urgent and important.

[0003] The seal of the PEM electrolyzer is an important component placed between the two bipolar plates. Its main function is to prevent gas from leaking. The membrane electrode, bipolar plate and seal form a sealed cavity. The seal forms two upper and lower contact surfaces with the membrane electrode (MEA) and bipolar plate respectively. Under the action of high-pressure gas (product hydrogen and oxygen), the sealing gasket has a tendency to move to the outside of the electrolyzer, relying on the friction on the compressed contact surface of the sealing gasket to prevent gas leakage.

[0004] Under the action of the electrolyzer assembly force, the sealing gasket is compressed and deformed, and the sealing force generated on the contact surface can resist gas leakage. However, in the face of the demand for high-pressure hydrogen production, the traditional sealing structure is difficult to ensure the airtightness of the electrolyzer, and hydrogen leakage or hydrogen-oxygen crosstalk will cause huge safety hazards to the production process. Utility Model Content

[0005] In order to overcome the problem that the PEM electrolyzer in the prior art cannot achieve high-pressure sealing, the utility model provides a sealing structure for high-pressure PEM electrolyzer hydrogen production.

[0006] The utility model discloses a sealing structure for high-pressure PEM electrolyzer hydrogen production, comprising an anode side sealing structure, a cathode side sealing structure, a cathode bipolar plate, an anode bipolar plate and a membrane electrode, wherein the anode side sealing structure and the cathode side sealing structure are staggeredly installed, the anode side sealing structure is installed between the anode bipolar plate and the membrane electrode, the cathode side sealing structure is installed between the cathode bipolar plate and the membrane electrode, the anode bipolar plate and the cathode bipolar plate are rectangular structures, the cathode side sealing structure comprises a first cathode seal and a second cathode seal, the anode side sealing structure comprises a first anode seal and a second anode seal, the first anode seal is on the outside of the first cathode seal, and the second anode seal is on the outside of the second cathode seal.

[0007] On this basis, the first cathode seal includes a first thin sealing strip and a first thick sealing strip, the second cathode seal includes a second thin sealing strip and a second thick sealing strip, the first anode seal includes a third thin sealing strip and a third thick sealing strip, and the second anode seal includes a fourth thin sealing strip and a fourth thick sealing strip.

[0008] On this basis, the first thin sealing strip and the first thick sealing strip in the first cathode seal are placed in the slot of the cathode bipolar plate close to the reaction chamber, the second thin sealing strip and the second thick sealing strip in the second cathode seal are placed in the slot of the cathode bipolar plate away from the reaction area, the third thin sealing strip and the third thick sealing strip in the first anode seal are placed in the slot of the anode bipolar plate close to the reaction chamber, and the fourth thin sealing strip and the fourth thick sealing strip in the second anode seal are placed in the slot of the anode bipolar plate away from the reaction area.

[0009] On this basis, the third thin sealing strip is on the inner side of the third thick sealing strip; the fourth thin sealing strip is on the inner side of the fourth thick sealing strip; the first thin sealing strip is on the inner side of the first thick sealing strip; and the second thin sealing strip is on the inner side of the second thick sealing strip.

[0010] On this basis, the first cathode seal, the membrane electrodes above and below it, and the cathode bipolar plate form a first hydrogen sealing chamber, the second cathode seal, the membrane electrodes above and below it, and the cathode bipolar plate form a second hydrogen sealing chamber, the first anode seal, the membrane electrodes above and below it, and the anode bipolar plate form a third oxygen sealing chamber, and the second anode seal, the membrane electrodes above and below it, and the anode bipolar plate form a fourth oxygen sealing chamber.

[0011] On this basis, the first cathode seal is provided with a first long side, a first short side, a hydrogen port and a cathode reinforcement side, the connection between the first long side and the first short side is a rounded corner, the hydrogen port is a rounded rectangular structure and is located on both sides of the first short side, the cathode reinforcement side is on the first short side, and the second cathode seal is provided with a second long side and a second short side, and the connection between the second long side and the second short side is a rounded corner.

[0012] On this basis, the first anode seal is provided with a third long side, a third short side, a water and oxygen port and an anode reinforcement side; the connection between the third long side and the third short side is rounded; the water and oxygen port is a rounded rectangular structure and is located in the middle of the third short side; the anode reinforcement side is on the third short side; the second anode seal is provided with a fourth long side and a fourth short side; the connection between the fourth long side and the fourth short side is rounded.

[0013] On this basis, the length of the fourth long side is greater than the third long side, greater than the second long side, and greater than the first long side; the length of the fourth short side is greater than the third short side, greater than the second short side, and greater than the first short side.

[0014] On this basis, the first cathode seal, the second cathode seal, the first anode seal, the second anode seal, the cathode bipolar plate and the anode bipolar plate are all bonded with primer glue.

[0015] On this basis, the width of the first thin sealing strip, the first thick sealing strip, the second thin sealing strip, the second thick sealing strip, the third thin sealing strip, the third thick sealing strip, the fourth thin sealing strip and the fourth thick sealing strip is 1 to 10 mm, the thickness of the first thin sealing strip, the second thin sealing strip, the third thin sealing strip and the fourth thin sealing strip is 0.5 to 2.0 mm, the thickness of the first thick sealing strip, the second thick sealing strip, the third thick sealing strip and the fourth thick sealing strip is 1.0 to 3.0 mm, the intervals between the first cathode seal and the first anode seal, the second cathode seal and the second anode seal are 1 to 10 mm, and the widths of the cathode reinforcement edge and the anode reinforcement edge are 1 to 20 mm.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] (1) The multi-stage sealing structure can better meet the high-pressure sealing requirements of the electrolytic cell. The cathode side adopts a first cathode seal and a second cathode seal to form a double hydrogen chamber sealing structure, which is more conducive to the sealing of high-pressure hydrogen. At the same time, the anode side adopts a first anode seal and a second anode seal to form a double oxygen chamber sealing structure, which is more conducive to the sealing of high-pressure oxygen.

[0018] (2) The cathode side seal and the anode side seal are installed in a staggered manner, which can prevent the sealing strip from rolling over due to extrusion and avoid the problem of sealing failure in the traditional overlapping sealing structure.

[0019] (3) Both the cathode side seal and the anode side seal are composed of a thick sealing strip and a thin sealing strip. Under the action of high-pressure gas (product hydrogen and oxygen), the sealing gasket has a tendency to move to the outside of the electrolytic cell. Compared with the traditional sealing structure, in addition to the original friction force, the present application also enables the thick sealing strip to provide a longitudinal reaction force for the thin sealing strip, thereby enhancing the sealing effect.

[0020] (4) For the overlapping parts of the anode seal and the cathode seal, a reinforcement structure is also used to increase the contact area, which can effectively reduce the strain on the membrane electrode in the overlapping area, avoid leakage, and improve the overall stability and safety of the electrolyzer. By reducing gas leakage and optimizing the sealing of the reaction chamber, this structure can improve the energy efficiency of the electrolyzer. This means that with the same energy input, more hydrogen and oxygen can be produced, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a cross-sectional view of the sealing structure for high-pressure PEM electrolyzer hydrogen production of the utility model;

[0022] Figure 2 It is a top view of the sealing structure for high-pressure PEM electrolyzer hydrogen production of the utility model;

[0023] Figure 3 This is a schematic diagram of the cathode side structure of the utility model;

[0024] Figure 4 This is a schematic diagram of the anode side structure of the utility model;

[0025] In the figure: 1. first cathode seal, 11. first thin sealing strip, 12. first thick sealing strip, 13. first long side, 14. first short side, 15. hydrogen port, 16. cathode reinforcement side, 2. second cathode seal, 21. second thin sealing strip, 22. second thick sealing strip, 23. second long side, 24. second short side, 3. first anode seal, 31. third thin sealing strip, 32. third thick sealing strip, 33. third long side, 34. third short side, 35. water and oxygen port, 36. anode reinforcement side, 4. second anode seal, 41. fourth thin sealing strip, 42. fourth thick sealing strip, 43. fourth long side, 44. fourth short side, 5. cathode bipolar plate, 6. anode bipolar plate, 7. membrane electrode. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] The utility model discloses a sealing structure for high-pressure PEM electrolyzer hydrogen production, referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 ,, including an anode side sealing structure, a cathode side sealing structure, a cathode bipolar plate 5, an anode bipolar plate 6 and a membrane electrode 7, the anode side sealing structure and the cathode side sealing structure are staggered, the anode side sealing structure is installed between the anode bipolar plate 6 and the membrane electrode 7, the cathode side sealing structure is installed between the cathode bipolar plate 5 and the membrane electrode 7, the anode bipolar plate 6 and the cathode bipolar plate 5 are rectangular structures, the cathode side sealing structure includes a first cathode seal 1 and a second cathode seal 2, the anode side sealing structure includes a first anode seal 3 and a second anode seal 4, the first anode seal 3 is on the outside of the first cathode seal 1, and the second anode seal 4 is on the outside of the second cathode seal 2.

[0028] The optimization of the sealing structure can ensure the stability of the electrolyzer in long-term continuous operation, reduce the risk of downtime due to leakage or sealing failure, and ensure the continuity and stability of the production process. Through the staggered installation of the anode side seal structure and the cathode side seal structure, multiple sealing barriers can be formed, thereby enhancing the sealing performance of the electrolyzer, helping to prevent the leakage of hydrogen and other gases, and improving the safety and reliability of the entire system; allowing the PEM electrolyzer to operate at a higher operating pressure. High-pressure operation can improve electrolysis efficiency, increase hydrogen production, and reduce energy consumption; reduce component damage caused by gas leakage or corrosion, thereby extending the service life of the electrolyzer, which not only reduces maintenance costs, but also improves the overall economy of the system. In addition, due to the improvement of sealing performance, the structure can reduce frequent maintenance and inspections caused by leakage, which helps to reduce the work intensity of maintenance personnel and improve production efficiency. The design of the sealing structure allows it to adapt to PEM electrolyzers of different specifications and sizes, so it has a wide range of applicability.

[0029] The first cathode seal 1 includes a first thin sealing strip 11 and a first thick sealing strip 12 , the second cathode seal 2 includes a second thin sealing strip 21 and a second thick sealing strip 22 , the first anode seal 3 includes a third thin sealing strip 31 and a third thick sealing strip 32 , and the second anode seal 4 includes a fourth thin sealing strip 41 and a fourth thick sealing strip 42 .

[0030] The first thin sealing strip 11 and the first thick sealing strip 12 in the first cathode seal 1 are placed in the slot of the cathode bipolar plate 5 close to the reaction chamber, the second thin sealing strip 21 and the second thick sealing strip 22 in the second cathode seal 2 are placed in the slot of the cathode bipolar plate 5 away from the reaction area, the third thin sealing strip 31 and the third thick sealing strip 32 in the first anode seal 3 are placed in the slot of the anode bipolar plate 6 close to the reaction chamber, and the fourth thin sealing strip 41 and the fourth thick sealing strip 42 in the second anode seal 4 are placed in the slot of the anode bipolar plate 6 away from the reaction area.

[0031] The third thin sealing strip 31 is on the inner side of the third thick sealing strip 32 ; the fourth thin sealing strip 41 is on the inner side of the fourth thick sealing strip 42 ; the first thin sealing strip 11 is on the inner side of the first thick sealing strip 12 ; and the second thin sealing strip 21 is on the inner side of the second thick sealing strip 22 .

[0032] Taking the first cathode seal 1 as an example, the first thin sealing strip 11 is placed on the inner side of the first thick sealing strip 12. Hydrogen and oxygen will be generated in the chamber during the operation of the electrolytic cell. Under the action of the high-pressure gas, in addition to the original friction force, the first thin sealing strip 11 on the inner side will generate a thrust on the first thick sealing strip 12. Correspondingly, the first thick sealing strip 12 provides a reaction force for the first thin sealing strip 11 on the inner side, forming an internal secondary seal to improve the overall airtightness of the electrolytic cell. The same is true for the others. This structure provides multiple levels of sealing in the electrolytic cell, which not only improves the reliability of the seal, but also allows different pressures and operating conditions. The thin and thick sealing strips are placed in the slots close to and far from the reaction chamber respectively, so that a tighter sealing environment is formed around the reaction chamber, which helps to reduce gas leakage, especially under high pressure and high hydrogen production conditions. Due to the multi-level sealing design and optimized layout, the structure can significantly reduce the risk of gas leakage, thereby improving the safety of the entire electrolyzer system, which is especially important for PEM electrolyzers under high pressure operation; due to the improved sealing performance and enhanced system stability, the structure can reduce maintenance costs caused by leakage or damage. In addition, due to the flexibility of the design, the structure also allows for rapid maintenance and replacement when necessary.

[0033] The first cathode seal 1 forms a first hydrogen sealing chamber with its upper and lower membrane electrodes 7 and cathode bipolar plate 5, the second cathode seal 2 forms a second hydrogen sealing chamber with its upper and lower membrane electrodes 7 and cathode bipolar plate 5, the first anode seal 3 forms a third oxygen sealing chamber with its upper and lower membrane electrodes 7 and anode bipolar plate 6, and the second anode seal 4 forms a fourth oxygen sealing chamber with its upper and lower membrane electrodes 7 and anode bipolar plate 6. By forming independent hydrogen sealing chambers and oxygen sealing chambers, it is ensured that hydrogen and oxygen are effectively isolated and collected in their respective areas, which not only improves the stability of the system, but also helps to improve the purity and yield of hydrogen and oxygen.

[0034] The first cathode seal 1 is provided with a first long side 13, a first short side 14, a hydrogen port 15 and a cathode reinforcement side 16. The connection between the first long side 13 and the first short side 14 is a rounded corner. The hydrogen port 15 is a rounded rectangular structure and is located on both sides of the first short side 14. The cathode reinforcement side 16 is on the first short side 14. The second cathode seal 2 is provided with a second long side 23 and a second short side 24. The connection between the second long side 23 and the second short side 24 is a rounded corner.

[0035] The first anode seal 3 is provided with a third long side 33, a third short side 34, a water and oxygen port 35 and an anode reinforcement side 36. The connection between the third long side 33 and the third short side 34 is rounded. The water and oxygen port 35 is a rounded rectangular structure and is located in the middle of the third short side 34. The anode reinforcement side 36 is on the third short side 34. The second anode seal 4 is provided with a fourth long side 43 and a fourth short side 44. The connection between the fourth long side 43 and the fourth short side 44 is rounded. The length of the fourth long side 43 is greater than the third long side 33, greater than the second long side 23, and greater than the first long side 13. The length of the fourth short side 44 is greater than the third short side 34, greater than the second short side 24, and greater than the first short side 14.

[0036] The seal can better adapt to the shape of the bipolar plate and membrane electrode, reducing the problem of seal failure caused by size mismatch; at the same time, the rounded corner design also increases the durability and fatigue resistance of the seal. The cathode reinforcement edge 16 and anode reinforcement edge 36 design on the cathode and anode seals can further enhance the sealing performance, especially under high pressure and high hydrogen production working conditions, these reinforcement edges can provide additional support and compression force to ensure the seal and the bipolar plate and membrane electrode close fit.

[0037] The rounded rectangular design of the hydrogen port 15 and the water and oxygen ports 35 not only optimizes the path of gas flow and reduces the resistance to gas flow, but also improves the safety of the seals in these key locations, helping to prevent gas leakage and accumulation, thereby reducing potential explosion and fire risks.

[0038] The design of the seal takes into account the convenience of installation and maintenance. Through reasonable size and shape design, the seal can be easily placed in and removed from the slot, making replacement and repair convenient. In addition, the rounded corner design also reduces the risk of damage to the seal during installation and maintenance.

[0039] The first cathode seal 1 , the second cathode seal 2 , the first anode seal 3 , and the second anode seal 4 are bonded to the cathode bipolar plate 5 and the anode bipolar plate 6 by using a primer.

[0040] The primer can wet and penetrate the surface of the material to form a uniform coating, which enhances the adhesion between the materials. This ensures a tight connection between the seal and the bipolar plate, thereby enhancing the sealing performance of the entire electrolytic cell. The active ingredients in the primer can react chemically with the surface of the material to form a chemical bond, further improving the bonding strength. This chemical bond ensures that the seal and the bipolar plate can maintain a stable connection even under high pressure, high humidity and acidic environments to prevent gas leakage. The use of primer can also fill the tiny gap between the seal and the bipolar plate, making the entire sealing structure more perfect and preventing sealing failure caused by material size differences or installation errors.

[0041] The width of the first thin sealing strip 11, the first thick sealing strip 12, the second thin sealing strip 21, the second thick sealing strip 22, the third thin sealing strip 31, the third thick sealing strip 32, the fourth thin sealing strip 41, and the fourth thick sealing strip 42 is 1 to 10 mm, the thickness of the first thin sealing strip 11, the second thin sealing strip 21, the third thin sealing strip 31, and the fourth thin sealing strip 41 is 0.5 to 2.0 mm, the thickness of the first thick sealing strip 12, the second thick sealing strip 22, the third thick sealing strip 32, and the fourth thick sealing strip 42 is 1.0 to 3.0 mm, the interval between the first cathode seal 1 and the first anode seal 3, the second cathode seal 2 and the second anode seal 4 is 1 to 10 mm, the width of the cathode reinforcement edge 16 and the anode reinforcement edge 36 is 1 to 20 mm, and the above size range is to adapt to electrolytic cells with different active area areas, and the specific size depends on the actual area of ​​the electrolytic cell.

[0042] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation", "screwing", "pad installation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0044] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A sealing structure for high-pressure PEM electrolyzer hydrogen production, characterized in that: The invention comprises an anode side sealing structure, a cathode side sealing structure, a cathode bipolar plate (5), an anode bipolar plate (6) and a membrane electrode (7); the anode side sealing structure and the cathode side sealing structure are installed in a staggered manner; the anode side sealing structure is installed between the anode bipolar plate (6) and the membrane electrode (7); the cathode side sealing structure is installed between the cathode bipolar plate (5) and the membrane electrode (7); the anode bipolar plate (6) and the cathode bipolar plate (5) are rectangular structures; the cathode side sealing structure comprises a first cathode seal (1) and a second cathode seal (2); the anode side sealing structure comprises a first anode seal (3) and a second anode seal (4); the first anode seal (3) is on the outside of the first cathode seal (1); and the second anode seal (4) is on the outside of the second cathode seal (2).

2. The sealing structure for high-pressure PEM electrolyzer hydrogen production according to claim 1, characterized in that: The first cathode seal (1) comprises a first thin sealing strip (11) and a first thick sealing strip (12), the second cathode seal (2) comprises a second thin sealing strip (21) and a second thick sealing strip (22), the first anode seal (3) comprises a third thin sealing strip (31) and a third thick sealing strip (32), and the second anode seal (4) comprises a fourth thin sealing strip (41) and a fourth thick sealing strip (42).

3. The sealing structure for high-pressure PEM electrolyzer hydrogen production according to claim 1, characterized in that: The first thin sealing strip (11) and the first thick sealing strip (12) in the first cathode seal (1) are placed in a slot of the cathode bipolar plate (5) close to the reaction chamber, the second thin sealing strip (21) and the second thick sealing strip (22) in the second cathode seal (2) are placed in a slot of the cathode bipolar plate (5) away from the reaction area, the third thin sealing strip (31) and the third thick sealing strip (32) in the first anode seal (3) are placed in a slot of the anode bipolar plate (6) close to the reaction chamber, and the fourth thin sealing strip (41) and the fourth thick sealing strip (42) in the second anode seal (4) are placed in a slot of the anode bipolar plate (6) away from the reaction area.

4. The sealing structure for high-pressure PEM electrolyzer hydrogen production according to claim 2, characterized in that: The third thin sealing strip (31) is on the inner side of the third thick sealing strip (32); the fourth thin sealing strip (41) is on the inner side of the fourth thick sealing strip (42); the first thin sealing strip (11) is on the inner side of the first thick sealing strip (12); and the second thin sealing strip (21) is on the inner side of the second thick sealing strip (22).

5. The sealing structure for high-pressure PEM electrolyzer hydrogen production according to claim 1, characterized in that: The first cathode seal (1) forms a first hydrogen sealing chamber with the membrane electrodes (7) above and below it and the cathode bipolar plate (5); the second cathode seal (2) forms a second hydrogen sealing chamber with the membrane electrodes (7) above and below it and the cathode bipolar plate (5); the first anode seal (3) forms a third oxygen sealing chamber with the membrane electrodes (7) above and below it and the anode bipolar plate (6); and the second anode seal (4) forms a fourth oxygen sealing chamber with the membrane electrodes (7) above and below it and the anode bipolar plate (6).

6. The sealing structure for high-pressure PEM electrolyzer hydrogen production according to claim 3, characterized in that: The first cathode seal (1) is provided with a first long side (13), a first short side (14), a hydrogen port (15) and a cathode reinforcement side (16); the first long side (13) and the first short side (14) are connected at a rounded corner; the hydrogen port (15) is a rounded rectangular structure and is located on both sides of the first short side (14); the cathode reinforcement side (16) is on the first short side (14); the second cathode seal (2) is provided with a second long side (23) and a second short side (24); the second long side (23) and the second short side (24) are connected at a rounded corner.

7. The sealing structure for high-pressure PEM electrolyzer hydrogen production according to claim 1, characterized in that: The first anode seal (3) is provided with a third long side (33), a third short side (34), a water and oxygen port (35) and an anode reinforcement side (36); the connection between the third long side (33) and the third short side (34) is a rounded corner; the water and oxygen port (35) is a rounded rectangular structure and is located in the middle of the third short side (34); the anode reinforcement side (36) is on the third short side (34); the second anode seal (4) is provided with a fourth long side (43) and a fourth short side (44); the connection between the fourth long side (43) and the fourth short side (44) is a rounded corner.

8. The sealing structure for high-pressure PEM electrolyzer hydrogen production according to claim 7, characterized in that: The length of the fourth long side (43) is greater than the third long side (33), greater than the second long side (23), and greater than the first long side (13); the length of the fourth short side (44) is greater than the third short side (34), greater than the second short side (24), and greater than the first short side (14).

9. The sealing structure for high-pressure PEM electrolyzer hydrogen production according to claim 1, characterized in that: The first cathode seal (1), the second cathode seal (2), the first anode seal (3) and the second anode seal (4) are bonded to the cathode bipolar plate (5) and the anode bipolar plate (6) by using a primer.

10. The sealing structure for high-pressure PEM electrolyzer hydrogen production according to claim 6, characterized in that: The width of the first thin sealing strip (11), the first thick sealing strip (12), the second thin sealing strip (21), the second thick sealing strip (22), the third thin sealing strip (31), the third thick sealing strip (32), the fourth thin sealing strip (41), and the fourth thick sealing strip (42) is 1 to 10 mm, the thickness of the first thin sealing strip (11), the second thin sealing strip (21), the third thin sealing strip (31), and the fourth thin sealing strip (41) is 0.5 to 2.0 mm, the thickness of the first thick sealing strip (12), the second thick sealing strip (22), the third thick sealing strip (32), and the fourth thick sealing strip (42) is 1.0 to 3.0 mm, the interval between the first cathode seal (1) and the first anode seal (3), the second cathode seal (2), and the second anode seal (4) is 1 to 10 mm, and the width of the cathode reinforcement edge (16) and the anode reinforcement edge (36) is 1 to 20 mm.

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