Concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame and electrolysis unit

Abstract

The invention belongs to the technical field of pressure type water electrolysis hydrogen production, and particularly relates to a concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame and an electrolysis unit.The concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame comprises an electrode frame body and a bipolar plate, the bipolar plate and the electrode frame body are integrally formed in an injection molding mode, and a first boss is arranged on the outer edge of the front face of the electrode frame body; the electrolysis unit comprises two end pole plates and a plurality of concave-convex flange type high-pressure water electrolysis hydrogen production electrode frames, and each concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame is located between the two end pole plates and is aligned and stacked together in the axial direction. The bipolar plate and the electrode frame are formed into an integrated structure through an injection molding process, and the bipolar plate is accurately embedded in the electrode frame in the injection molding process, so that the overall structural strength of the electrolysis unit is improved, and gas or liquid leakage possibly generated in the electrolysis process is effectively prevented; therefore, safe and efficient electrolytic reaction is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure-type water electrolysis hydrogen production, and in particular is a concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame and an electrolysis unit. Background Art

[0002] Under the background of "dual carbon", hydrogen energy is regarded as the most promising secondary clean energy in the future due to its characteristics of no carbon pollution and high energy density. The electrolyzer is a device for generating hydrogen by water electrolysis. In the current electrolyzer for hydrogen production by water electrolysis, the flat gasket is tightened by bolts, and the pressure resistance is generally no more than 3MPa.

[0003] With the rapid development of technology, the market demand for high current in electrolyzers is getting higher and higher. When the electrolyzer is running under high current, a high-pressure environment is gradually formed due to the continuous generation of hydrogen and oxygen, which can easily lead to gas and liquid leakage accidents in the electrolyzer. Summary of the invention

[0004] The purpose of the present invention is to provide a concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame and electrolysis unit, and to improve and upgrade the water electrolysis hydrogen production equipment in view of the technical problems existing in the existing water electrolysis hydrogen production electrolyzer, so as to form a sealing and reliable structure, so as to improve the high-pressure resistance performance of the device.

[0005] On the one hand, in order to solve the above technical problems, the present invention provides a concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame, including a pole frame and a bipolar plate arranged in the inner cavity thereof, the bipolar plate and the pole frame are integrally injection molded, a boss 1 is arranged on the front outer edge of the pole frame, a groove 2 adapted to the boss 1 is arranged on the reverse outer edge of the pole frame, a threaded hole is arranged on the outer peripheral surface of the pole frame, a detection column integrally connected to the bipolar plate is arranged in the threaded hole, a protective cap covering the detection column is connected to the threaded hole, a hydrogen interface 1 and an oxygen interface 1 are arranged on the outer peripheral surface of the pole frame, and a protective cap covering the detection column is connected to the threaded hole. A hydrogen channel 1 and an oxygen channel 1 extending in the circumferential direction, the oxygen channel 1 and the hydrogen channel 1 are separated by a bipolar plate, two isolation chambers are arranged on the front of the pole frame, each of the isolation chambers is filled with a breathable and waterproof pad, one of the isolation chambers is connected to a hydrogen interface 1 and a hydrogen channel 1, and the other isolation chamber is connected to an oxygen interface 1 and an oxygen channel 1, and the front of the pole frame is provided with a liquid inlet hole and a liquid outlet hole distributed up and down, the liquid inlet hole is connected to the inner cavity of the pole frame through a liquid inlet channel 1 opened on the front and back sides of the pole frame, and the liquid outlet hole is connected to the inner cavity of the pole frame through a liquid outlet channel 1 opened on the front and back sides of the pole frame.

[0006] Preferably, a plurality of groups of guide posts are provided on the front side of the pole frame, and a guide groove corresponding to the guide posts is provided on the back side of the pole frame.

[0007] Preferably, the pole frame is made of EPDM rubber.

[0008] On the other hand, in order to solve the above-mentioned technical problems, the present invention also provides an electrolysis unit, comprising two end plates and a plurality of the above-mentioned concave-convex flange type high-pressure water electrolysis hydrogen production electrode frames, each of the concave-convex flange type high-pressure water electrolysis hydrogen production electrode frames is located between the two end plates and are aligned and stacked together along the axial direction, and a diaphragm is arranged between adjacent concave-convex flange type high-pressure water electrolysis hydrogen production electrode frames and between each end plate and the concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame, and the two end plates are axially tightened by a plurality of long-rod bolts to clamp each concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame, and the two end plates are respectively an anode end plate and a cathode end plate.

[0009] Preferably, the anode end plate comprises an anode frame, the inner cavity of the anode frame is integrally injection-molded with the anode plate, and the outer peripheral surface of the anode frame is provided with an anode terminal integrally connected to the anode plate; the cathode end plate comprises a cathode frame, the inner cavity of the cathode frame is integrally injection-molded with the cathode plate, and the outer peripheral surface of the cathode frame is provided with a cathode terminal integrally connected to the cathode plate.

[0010] Preferably, the front side of the anode frame is provided with a boss 2 adapted to the groove 2 and a guide column 2 adapted to the guide groove 1, the anode frame is provided with a liquid inlet interface facing the liquid inlet hole and a liquid outlet interface facing the liquid outlet hole, the back side of the anode frame is provided with an oxygen interface 2, the inner circumferential surface of the anode frame is provided with an oxygen channel 2 extending toward its outer circumferential surface and connected to the oxygen interface 2, the liquid inlet interface is connected to the inner cavity of the anode frame through the liquid inlet channel 2 opened on the front side, and the liquid outlet interface is connected to the inner cavity of the anode frame through the liquid outlet channel 2 opened on the front side.

[0011] Preferably, the front side of the cathode frame is provided with a groove four adapted to the boss one and a guide groove two adapted to the guide column one, the back side of the cathode frame is provided with a hydrogen interface two, the inner circumferential surface of the cathode frame is provided with a hydrogen channel two extending toward its outer circumferential surface and connected to the hydrogen interface two, the cathode frame is provided with a liquid inlet facing the liquid inlet hole and a liquid outlet facing the liquid outlet hole, the liquid inlet is connected to the inner cavity of the cathode frame through a liquid inlet channel three opened on the front side, and the liquid outlet is connected to the inner cavity of the cathode frame through a liquid outlet channel three opened on the front side.

[0012] Preferably, the outer edge of the diaphragm is provided with an integrally-injected rubber ring.

[0013] Preferably, the inner edges of the front and back sides of the pole frame are provided with groove one for fitting the rubber ring, the front inner edge of the anode frame is provided with groove three for fitting the rubber ring, and the front inner edge of the cathode frame is provided with groove five for fitting the rubber ring.

[0014] After adopting the above technical solution, the beneficial effects of the present invention are: The bipolar plate and the pole frame are formed into an integrated structure through the injection molding process. During the injection molding process, the bipolar plate is precisely embedded in the pole frame, which not only improves the overall structural strength of the electrolytic unit, but also effectively prevents the leakage of gas or liquid that may be generated during the electrolysis process, thereby ensuring the safety and efficiency of the electrolysis reaction. A boss 1 is provided on the outer edge of the front side of the pole frame, which forms a connection similar to a concave-convex flange with a groove 2 on the outer edge of the reverse side of the adjacent pole frame. The bite action of the boss surface and the concave surface increases the contact area of ​​the sealing surface, achieves a tighter sealing effect, and improves the high-pressure resistance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 is a schematic diagram of the three-dimensional structure of the electrode frame; Figure 2 It is a structural schematic diagram of the front side of the electrode frame; Figure 3 It is a schematic diagram of the structure on the reverse side of the electrode frame; Figure 4 is a schematic diagram of the structure of an electrolysis unit; Figure 5 for Figure 4 Another perspective of the picture; Figure 6 for Figure 4 A cross-sectional view of Figure 7 is a schematic diagram of the structure of the anode frame; Figure 8 is a schematic diagram of the structure of the cathode frame; Fig. 9 Schematic diagram of the assembly of the pole frame; Fig.10 Schematic diagram of the structure of the diaphragm.

[0017] Figure numerals: 1-polar frame, 2-bipolar plate, 3-liquid inlet hole, 4-liquid inlet channel 1, 5-guide column 1, 6-boss 1, 7-liquid outlet channel 1, 8-liquid outlet hole, 9-isolation chamber, 10-hydrogen interface 1, 11-oxygen interface 1, 12-threaded hole, 13-protective cap, 14-detection column, 15-groove 1, 16-hydrogen channel 1, 17-groove 2, 18-guide groove 1, 19-oxygen channel 1, 20-cathode frame, 21-cathode terminal, 22-long rod bolt, 23-liquid outlet interface, 24- Anode terminal, 25-oxygen interface 2, 26-anode frame, 27-liquid inlet interface, 28-hydrogen interface 2, 29-cathode plate, 30-diaphragm, 31-anode plate, 32-boss 2, 33-oxygen channel 2, 34-liquid outlet channel 2, 35-guide column 2, 36-liquid inlet channel 2, 37-groove 3, 38-liquid outlet channel 3, 39-groove 4, 40-groove 5, 41-liquid inlet channel 3, 42-guide groove 2, 43-rubber ring, 44-hydrogen channel 2, 45-liquid outlet, 46-liquid inlet. DETAILED DESCRIPTION

[0018] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0019] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0020] A concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame includes a pole frame 1 and a bipolar plate 2. The bipolar plate 2 and the pole frame 1 are formed into an integrated structure through an injection molding process. During the injection molding process, the bipolar plate 2 is accurately embedded in the pole frame 1. This close fit not only improves the overall structural strength of the electrolysis unit, but also effectively prevents the leakage of gas or liquid that may be generated during the electrolysis process, thereby ensuring the safety and efficiency of the electrolysis reaction.

[0021] The outer edge of the front side of the pole frame 1 is provided with a boss 16, and the outer edge of the back side of the pole frame 1 is provided with a groove 217 adapted to the boss 16. When multiple pole frames 1 are stacked, the convex surface of the boss 16 and the concave surface of the groove 217 form a connection similar to a concave-convex flange. The design of the boss 16 and the groove 217 allows adjacent pole frames 1 to be easily aligned and fixed together, greatly simplifying the assembly process and improving work efficiency. The bite action of the convex surface and the concave surface increases the contact area of ​​the sealing surface, achieves a tighter sealing effect, and improves the high pressure resistance of the device.

[0022] The outer peripheral surface of the pole frame 1 is provided with a hydrogen interface 10 and an oxygen interface 11 for collecting and exporting electrolytic gas, and the inner peripheral surface of the pole frame 1 is provided with a hydrogen channel 16 and an oxygen channel 19 extending toward its outer peripheral surface, which are separated by the bipolar plate 2 to ensure that the electrolyzed hydrogen and oxygen will not mix. Two non-through isolation chambers 9 are provided on the front of the pole frame 1, and each isolation chamber 9 is filled with a breathable water-proof pad, one of which is connected to the hydrogen interface 10 and the hydrogen channel 16, and the other isolation chamber 9 is connected to the oxygen interface 11 and the oxygen channel 19. The design of the isolation chamber 9 is mainly to provide a physical barrier between gas and liquid. Filling the isolation chamber 9 with a breathable water-proof pad can effectively prevent the electrolyte from entering the gas channel while allowing the gas to pass smoothly. This design not only reduces the content of water vapor in the gas (especially when the electrolysis temperature is high), but also improves the purity and collection efficiency of the gas.

[0023] The front of the pole frame 1 is provided with a liquid inlet hole 3 and a liquid outlet hole 8 which are distributed vertically and in a through-type manner. The liquid inlet hole 3 is connected to the inner cavity of the pole frame 1 through a liquid inlet channel 4 provided on the front and back sides of the pole frame 1, and the liquid outlet hole 8 is connected to the inner cavity of the pole frame 1 through a liquid outlet channel 7 provided on the front and back sides of the pole frame 1. The vertical distribution of the liquid inlet hole 3 and the liquid outlet hole 8 helps to form a natural circulation of the electrolyte. When the electrolyte is injected from the liquid inlet hole 3, it will gradually fill the inner cavity of the pole frame 1. When the liquid level reaches the position of the liquid outlet hole 8, the electrolyte will overflow from the liquid outlet hole 8 to form a flow circulation of the electrolyte. This natural circulation helps the electrolyte to be evenly distributed inside the pole frame 1, improves the electrolysis efficiency, and also prevents the electrolyte from pouring into the gas channel.

[0024] The front side of the pole frame 1 is provided with multiple groups of guide posts 5, and the back side of the pole frame 1 is provided with guide grooves 18 corresponding to the guide posts 5 one by one. The cooperation between the guide posts 5 and the guide grooves 18 provides precise guiding and positioning functions for the assembly of the pole frame 1. During the assembly process, the guide posts 5 can easily slide into the corresponding guide grooves 18 to ensure the precise alignment between the pole frames 1. Since the liquid inlet holes 3 and the liquid outlet holes 8 of the adjacent pole frames 1 can be accurately aligned, the electrolyte will not be hindered during the flow process, which helps to ensure that the electrolyte can be evenly distributed in the inner cavity of each pole frame 1, thereby improving the electrolysis efficiency.

[0025] An electrolysis unit includes two end plates and a plurality of the above-mentioned concave-convex flange type high-pressure water electrolysis hydrogen production electrode frames, each of which is located between the two end plates and is aligned and stacked together along the axial direction. A diaphragm 30 is provided between adjacent concave-convex flange type high-pressure water electrolysis hydrogen production electrode frames and between each end plate and the concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame, and the two end plates are tightened in the axial direction by a plurality of long rod bolts 22 to clamp each concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame.

[0026] The two end plates are respectively an anode end plate and a cathode end plate. The anode end plate includes an anode frame 26, the inner cavity of the anode frame 26 is integrally molded with an anode plate 31, and the outer peripheral surface of the anode frame 26 is provided with an anode terminal 24 integrally connected to the anode plate 31. The cathode end plate includes a cathode frame 20, the inner cavity of the cathode frame 20 is integrally molded with a cathode plate 29, and the outer peripheral surface of the cathode frame 20 is provided with a cathode terminal 21 integrally connected to the cathode plate 29.

[0027] The front side of the anode frame 26 (the side facing the pole frame 1) is provided with a boss 2 32 adapted to the groove 2 17 and a guide column 2 35 adapted to the guide groove 1 18, and the anode frame 26 is provided with a liquid inlet interface 27 facing the liquid inlet hole 3 and a liquid outlet interface 23 facing the liquid outlet hole 8. The reverse side of the anode frame 26 is provided with an oxygen interface 25, and the inner peripheral surface of the anode frame 26 is provided with an oxygen channel 2 33 extending toward the outer peripheral surface thereof and connected to the oxygen interface 25. The liquid inlet interface 27 is connected to the inner cavity of the anode frame 26 through the liquid inlet channel 2 36 provided on the front side, and the liquid outlet interface 23 is connected to the inner cavity of the anode frame 26 through the liquid outlet channel 2 34 provided on the front side.

[0028] The front side of the cathode frame 20 (the side facing the pole frame 1) is provided with a groove 439 adapted to the boss 6 and a guide groove 42 adapted to the guide column 5, the back side of the cathode frame 20 is provided with a hydrogen interface 28, and the inner peripheral surface of the cathode frame 20 is provided with a hydrogen channel 44 extending toward its outer peripheral surface and connected to the hydrogen interface 28. The cathode frame 20 is provided with a liquid inlet 46 facing the liquid inlet hole 3 and a liquid outlet 45 facing the liquid outlet hole 8. The liquid inlet 46 is connected to the inner cavity of the cathode frame 20 through the liquid inlet channel 3 41 provided on the front side, and the liquid outlet 45 is connected to the inner cavity of the cathode frame 20 through the liquid outlet channel 3 38 provided on the front side. Both the liquid inlet 46 and the liquid outlet 45 are non-through type.

[0029] The cathode frame 20, the anode frame 26 and the pole frame 1 are all made of EPDM rubber. The corrosion resistance, aging resistance, elasticity and electrical insulation of EPDM rubber make them an ideal material choice, ensuring the stability and reliability of the electrolytic unit during long-term operation, ensuring the safety of current transmission during the electrolysis process, and preventing safety problems such as short circuit and electric shock. A threaded hole 12 is provided on the outer peripheral surface of the pole frame 1, and a detection column 14 integrally connected to the bipolar plate 2 is provided in the threaded hole 12, and a protective cap 13 covering the detection column 14 is connected to the threaded hole 12. Since the pole frame 1 itself is not charged, in order to detect the voltage value, the detection column 14 can be used to manually measure the voltage value of the inner cavity of the pole frame 1 with a voltmeter.

[0030] The diaphragm 30 can effectively prevent the mixing of hydrogen and oxygen, while allowing the ions in the electrolyte to pass freely, thereby ensuring the continuous progress of the water electrolysis reaction. The outer edge of the diaphragm 30 is provided with an integrally injected rubber ring 43, the inner edges of the front and back sides of the pole frame 1 are provided with a groove 15 adapted to the rubber ring 43, the inner edge of the front side of the anode frame 26 is provided with a groove 37 adapted to the rubber ring 43, and the inner edge of the front side of the cathode frame 20 is provided with a groove 5 40 adapted to the rubber ring 43. These grooves are specially designed to adapt to the rubber ring 43, which can ensure that the rubber ring 43 can be tightly embedded in the groove, thereby achieving effective sealing between the pole frame 1 and other components.

[0031] In order to improve the sealing performance, a plurality of raised sealing lines are arranged on the boss surfaces of the boss 1 6 and the boss 2 32 , so as to form a close contact with the corresponding surface of the adjacent pole frame 1 , thereby preventing leakage of fluid or gas.

[0032] The electrolytic unit of the present invention is provided with four layers of sealing protection to achieve its high pressure resistance performance.

[0033] The first layer of sealing protection is the rubber ring seal. The rubber ring 43 on the outer edge of the diaphragm 30 can fit tightly with the groove 15, the groove 37 or the groove 5 40, which can effectively prevent the leakage of the electrolyte and provide the first protection for the internal environment of the electrolytic unit.

[0034] The second layer of sealing protection is a plane seal (such as the plane between the boss 6 and the groove 15). When the pole frame 1 is pressed, the planes between them will fit tightly, using the elastic deformation characteristics unique to the rubber material to form an effective sealing barrier. This plane sealing method is simple and direct, and can effectively prevent the leakage of the electrolyte, providing a second layer of protection for the internal environment of the electrolytic unit.

[0035] The third layer of sealing protection is a sealing line, which not only enhances the sealing effect between the contact surfaces, but also further improves the reliability and stability of the seal through line sealing.

[0036] The fourth layer of sealing protection utilizes the clever design of the boss structure. The edge of the pole frame 1 is carefully crafted into a boss shape (boss-6), forming a connection similar to a concave-convex flange with the concave surface (groove-15) of the adjacent pole frame 1. This design not only increases the contact area of ​​the sealing surface, but also achieves a tighter sealing effect through the bite action of the convex surface and the concave surface. The design of boss-6 also cleverly limits the deformation of the sealing line when it is squeezed, preventing it from exceeding the edge line, thereby further enhancing the reliability and durability of the seal.

[0037] Combining the above four-layer sealing design, the electrolysis unit of the present invention exhibits excellent sealing performance and pressure resistance. Its sealing performance has been greatly improved and can withstand a pressure of up to 10MPa, providing a solid guarantee for the efficient, safe and reliable operation of the water electrolysis hydrogen production process.

[0038] The hydrogen generated during the electrolysis process enters the hydrogen branch pipe through the hydrogen interface 10 and the hydrogen interface 28 respectively, and finally collects in the hydrogen main pipe. The oxygen generated during the electrolysis process enters the oxygen branch pipe through the oxygen interface 11 and the oxygen interface 25 respectively, and finally collects in the oxygen main pipe. The electrolyte storage tank heats the electrolyte, and then pumps it to the inside of the electrolysis unit through the electrolyte input pipe, and the overflowing electrolyte is pumped to the electrolyte storage tank. In this way, the electrolyte circulates between the electrolysis unit and the electrolyte storage tank, speeding up the material transfer speed between the electrode surface and the electrolyte, so that the reactants reach the electrode surface in time, and the products leave the electrode surface in time, thereby maintaining the high activity of the electrode surface and improving the electrolysis efficiency. The circulation of the electrolyte can also reduce the concentration polarization phenomenon caused by the concentration gradient in the electrolysis unit, making the electrolysis reaction more sufficient and uniform. The circulation of the electrolyte can also take away the heat generated during electrolysis, which helps to reduce the temperature in the electrolysis unit and reduce the safety hazards caused by high temperature.

[0039] Humidity sensors are installed on the oxygen and hydrogen main pipes. If the humidity is high, it means that the water content of the gas is high. At this time, it is necessary to reduce the heating temperature of the electrolyte storage tank to reduce the evaporation of water, and increase the amount of electrolyte input to increase the concentration of the electrolyte. If the humidity is lower than the set value, the heating temperature of the electrolyte storage tank will increase, increase the evaporation of water, and increase the amount of pure water input to reduce the concentration of the electrolyte and avoid excessive reaction.

[0040] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modified use based on the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame, comprising an electrode frame (1) and a bipolar plate (2) arranged in an inner cavity thereof, characterized in that: The bipolar plate (2) and the pole frame (1) are integrally injection molded; a boss (6) is provided on the front outer edge of the pole frame (1); a groove (17) adapted to the boss (6) is provided on the rear outer edge of the pole frame (1); a threaded hole (12) is provided on the outer peripheral surface of the pole frame (1); a detection column (14) integrally connected to the bipolar plate (2) is provided in the threaded hole (12); a protective cap (13) covering the detection column (14) is connected to the threaded hole (12); a hydrogen interface (10) and an oxygen interface (11) are provided on the outer peripheral surface of the pole frame (1); a hydrogen channel (16) and an oxygen channel (19) extending toward the outer peripheral surface thereof are provided on the inner peripheral surface of the pole frame (1); and the oxygen channel (19) is provided in the inner peripheral surface of the pole frame (1). 9) and hydrogen channel one (16) are separated by a bipolar plate (2), the front side of the pole frame (1) is provided with two isolation chambers (9), each of the isolation chambers (9) is filled with a breathable water-proof pad, one of the isolation chambers (9) is connected to the hydrogen interface one (10) and the hydrogen channel one (16), and the other isolation chamber (9) is connected to the oxygen interface one (11) and the oxygen channel one (19), the front side of the pole frame (1) is provided with a liquid inlet hole (3) and a liquid outlet hole (8) distributed up and down, the liquid inlet hole (3) is connected to the inner cavity of the pole frame (1) through a liquid inlet channel one (4) opened on the front and back sides of the pole frame (1), and the liquid outlet hole (8) is connected to the inner cavity of the pole frame (1) through a liquid outlet channel one (7) opened on the front and back sides of the pole frame (1).

2. The concave-convex flange type high pressure water electrolysis hydrogen production electrode frame according to claim 1, characterized in that: The front side of the pole frame (1) is provided with a plurality of groups of guide posts (5), and the back side of the pole frame (1) is provided with guide grooves (18) corresponding one to one with the guide posts (5).

3. The concave-convex flange type high pressure water electrolysis hydrogen production electrode frame according to claim 1, characterized in that: The material of the pole frame (1) is EPDM rubber.

4. An electrolysis unit, characterized in that: It comprises two end plates and a plurality of concave-convex flange type high-pressure water electrolysis hydrogen production electrode frames as described in any one of claims 1 to 3, each of the concave-convex flange type high-pressure water electrolysis hydrogen production electrode frames is located between the two end plates and are aligned and stacked together along the axial direction, a diaphragm (30) is provided between adjacent concave-convex flange type high-pressure water electrolysis hydrogen production electrode frames and between each end plate and the concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame, the two end plates are axially tightened by a plurality of long rod bolts (22) to clamp each concave-convex flange type high-pressure water electrolysis hydrogen production electrode frame, and the two end plates are respectively an anode end plate and a cathode end plate.

5. The electrolytic cell according to claim 4, characterized in that: The anode end plate comprises an anode frame (26), the inner cavity of the anode frame (26) is integrally molded with an anode plate (31), and the outer peripheral surface of the anode frame (26) is provided with an anode terminal (24) integrally connected to the anode plate (31); the cathode end plate comprises a cathode frame (20), the inner cavity of the cathode frame (20) is integrally molded with a cathode plate (29), and the outer peripheral surface of the cathode frame (20) is provided with a cathode terminal (21) integrally connected to the cathode plate (29).

6. The electrolytic cell according to claim 5, characterized in that: The front surface of the anode frame (26) is provided with a second boss (32) adapted to the second groove (17) and a second guide column (35) adapted to the first guide groove (18); the anode frame (26) is provided with a liquid inlet interface (27) facing the liquid inlet hole (3) and a liquid outlet interface (23) facing the liquid outlet hole (8); the back surface of the anode frame (26) is provided with a second oxygen interface (25); the inner peripheral surface of the anode frame (26) is provided with a second oxygen channel (33) extending toward the outer peripheral surface thereof and connected to the second oxygen interface (25); the liquid inlet interface (27) is connected to the inner cavity of the anode frame (26) through the second liquid inlet channel (36) provided on the front surface; and the liquid outlet interface (23) is connected to the inner cavity of the anode frame (26) through the second liquid outlet channel (34) provided on the front surface.

7. The electrolytic cell according to claim 6, characterized in that: The front surface of the cathode frame (20) is provided with a groove four (39) adapted to the boss one (6) and a guide groove two (42) adapted to the guide column one (5); the back surface of the cathode frame (20) is provided with a hydrogen interface two (28); the inner peripheral surface of the cathode frame (20) is provided with a hydrogen channel two (44) extending toward its outer peripheral surface and connected to the hydrogen interface two (28); the cathode frame (20) is provided with a liquid inlet (46) facing the liquid inlet hole (3) and a liquid outlet (45) facing the liquid outlet hole (8); the liquid inlet (46) is a non-through type and is connected to the inner cavity of the cathode frame (20) through a liquid inlet channel three (41) provided on the front surface; the liquid outlet (45) is a non-through type and is connected to the inner cavity of the cathode frame (20) through a liquid outlet channel three (38) provided on the front surface.

8. The electrolytic cell according to claim 5, characterized in that: An integrally-injected rubber ring (43) is provided on the outer edge of the diaphragm (30).

9. The electrolysis unit according to claim 8, characterized in that: The inner edges of the front and back sides of the pole frame (1) are provided with a groove one (15) adapted to fit the rubber ring (43), the inner edge of the front side of the anode frame (26) is provided with a groove three (37) adapted to fit the rubber ring (43), and the inner edge of the front side of the cathode frame (20) is provided with a groove five (40) adapted to fit the rubber ring (43).

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