Hydrogen production electrolytic cell structure

Abstract

The invention belongs to a hydrogen production electrolytic cell structure in the technical field of water electrolysis hydrogen production. A concave platform (6) is arranged on the back of the pole frame close to one side, and a convex platform (7) is arranged on the back of the pole frame close to the inner side of the other side; a cathode runner of the cathode stamping bipolar plate (5) is parallel to the flow guide structure (9) of the cathode side electrode frame (3); the convex platform (7) of the anode side pole frame (2) is buckled with the concave platform (6) of the cathode side pole frame (3); and the concave platform (6) of the anode side pole frame (2) is buckled with the convex platform (7) of the cathode side pole frame (3). According to the hydrogen production electrolytic cell structure, the electrode frame suitable for the cathode and the anode at the same time can be provided; the electrode frame and the double-face vulcanized sealing piece have the effect of protecting the membrane electrode, the situation that the gas diffusion layer generates tearing force on the membrane electrode due to the fact that the gas diffusion layer is extruded by assembly pressure is prevented, the electrode frame is provided with a fool-proof structure to guarantee correct installation of the electrode frame, and faults or damaged pieces caused by assembly errors are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogen production by water electrolysis, and more specifically, relates to a hydrogen production electrolytic cell structure. Background Art

[0002] In the process of continuous development and evolution of human society, energy has always been the key force to promote progress. With the increasing environmental pressure and resource depletion problems brought about by dependence on traditional energy, it has become a top priority to find clean, efficient and sustainable new energy. Among many emerging energy sources, hydrogen energy has gradually emerged with its unique advantages, showing great potential to become the main energy source in the future. The green source of hydrogen is mainly produced by electrolysis of water. The electrolysis of water to produce hydrogen is to apply direct current in the electrolyzer to decompose water into hydrogen and oxygen. At present, the hydrogen production electrolyzers on the market are mainly alkaline electrolyzers and proton exchange membrane electrolyzers, among which bipolar plates are one of the important components. In order to have good conductivity and corrosion resistance, titanium metal is often used as the bipolar plate substrate, and then the flow channel is etched on the titanium material to form a bipolar plate, which causes it to occupy a relatively high proportion of cost. In order to reduce the cost of bipolar plates and save production time, this problem can be solved by designing stamped bipolar plates. However, since the flow channels on both sides of the stamped bipolar plate correspond to each other, in order to separate the water and gas channels, two pole frames are generally designed to assist in providing water and gas inlets and outlets, and seals are also used to ensure the sealing of the stamped bipolar plate.

[0003] In the prior art, firstly, the etched bipolar plate is designed to be S-shaped, in order to ensure that the anode side and the cathode side near the outlet are in different positions, but the stamped bipolar plate is limited by the process, the front and back sides are concave and convex corresponding, and the cathode and cathode inlet are in the same place, so a pole frame design is needed to cooperate with the stamped bipolar plate to respectively have the anode inlet and outlet and the cathode outlet. Secondly, as an important component in the electrolyzer, the gas diffusion layer is often pressed against the seal due to position displacement during the assembly process; or under the assembly force, the gas diffusion layer will have a tearing force on the membrane electrode, and the structural design of the pole frame needs to avoid these two problems. Thirdly, the seal in the electrolyzer plays a vital role in the normal operation and safety of the electrolyzer, but because the seal is elastic and in close contact with the gas diffusion layer, the electrolyzer needs to be installed very carefully during installation. This problem increases the production time and labor cost of the electrolyzer, otherwise the seal and the gas diffusion layer will overlap, causing leakage and affecting the qualified rate of the electrolyzer. The currently commonly used pole frame design is mainly used in conjunction with etched bipolar plates, or two pole frame designs are used in conjunction with stamped bipolar plates, which increases design, production costs and assembly complexity; at the same time, it cannot solve the destructive effect of the gas diffusion layer on the membrane electrode under the action of assembly pressure.

[0004] In the prior art, there is a technology named "a hydrogen production electrolytic cell structure" and the publication (announcement) number is "CN117845249A", which provides a hydrogen production electrolytic cell structure, including: a group of electrolytic chambers connected in series and a group of end pressure plates, butterfly springs, nuts, tension screws and insulating gaskets. The electrolytic chamber includes: a positive plate, a negative plate, a pole frame, an anode electrode, a cathode electrode, a diaphragm and a sealing gasket; the pole frame is arranged on the outside of the positive plate and the negative plate, and the surface of the pole frame is processed with a set number of flow channels and sealing lines; the diaphragm is arranged inside the electrolytic chamber to separate the hydrogen and oxygen generated in the electrolytic chamber. The end pressure plate, butterfly spring, nut and tension screw fix the electrolytic chambers connected in series, and insulating gaskets are respectively arranged between the end pressure plate and the positive plate, and between the end pressure plate and the negative plate. The technical solution of this invention can reduce the withstand voltage of the insulating plate between the end pressure plate and the electrode plate, reduce the possibility of sparking to the ground after insulation problems occur, improve the safety of the electrolytic cell, reduce the erosion and corrosion of the cell body by the alkaline solution flow rate, and extend the service life of the electrolytic cell body.

[0005] However, this technology does not involve the technical problems and technical solutions of the present application. Summary of the invention

[0006] The technical problem to be solved by the present invention is: in view of the deficiencies in the prior art, a pole frame with a simple structure that can be applied to both positive and negative poles is provided; the pole frame structure and the double-sided vulcanized seal have the function of protecting the membrane electrode, effectively preventing the assembly pressure from squeezing the gas diffusion layer and causing the gas diffusion layer to tear the membrane electrode; the pole frame has an anti-fool structure to ensure the correct installation of the pole frame, improve the overall performance of the structure, and avoid malfunctions or broken parts caused by assembly errors.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0008] The present invention discloses a hydrogen production electrolyzer structure. The pole frame comprises an anode side pole frame and a cathode side pole frame. The anode side pole frame and the cathode side pole frame have the same structure. A support structure and a flow guide structure are arranged near the inner side of the front side of the pole frame. A concave platform is arranged near one side of the back side of the pole frame. A convex platform is arranged near the other side of the back side of the pole frame. When the anode side pole frame and the cathode side pole frame are arranged, the anode side pole frame is located inside the anode stamping bipolar plate, and the cathode side pole frame is located inside the cathode stamping bipolar plate. The anode flow channel of the anode stamping bipolar plate is arranged in parallel with the flow channel of the flow guide structure of the anode side pole frame; the cathode flow channel of the cathode stamping bipolar plate is arranged vertically with the flow channel of the flow guide structure of the cathode side pole frame; the convex platform of the anode side pole frame is buckled with the concave platform of the cathode side pole frame, and the concave platform of the anode side pole frame is buckled with the convex platform of the cathode side pole frame.

[0009] The pole frame is provided with a plurality of connection holes near the outer side, and a membrane electrode and a gas diffusion layer are provided between the anode side pole frame and the cathode side pole frame.

[0010] A recessed structure is arranged inside the pole frame, and a pole frame flow channel opening, a supporting structure and a flow guide structure are arranged on the front side of the recessed structure.

[0011] A support structure and a guide structure are arranged near the inner side of the front side of the anode side pole frame, a concave platform is arranged at the middle connection port near the guide structure side of the back side of the anode side pole frame, and a convex platform is arranged at the middle connection port on the back side of the anode side pole frame without the guide structure.

[0012] A support structure and a guide structure are arranged near the inner side of the cathode side pole frame front, a concave platform is arranged at the middle connection port near the guide structure side on the cathode side pole frame back, and a convex platform is arranged at the middle connection port on the guide structure side on the anode side pole frame back.

[0013] The front side of the recessed structure of the pole frame on the anode side is vulcanized to set the pole frame front seal, the back side of the recessed structure of the pole frame on the anode side is vulcanized to set the pole frame back seal, the front side of the recessed structure of the pole frame on the cathode side is vulcanized to set the pole frame front seal, and the back side of the recessed structure of the pole frame on the cathode side is vulcanized to set the pole frame back seal.

[0014] A positioning hole is also arranged on the recessed structure of the pole frame.

[0015] The anode stamping bipolar plate, the anode side pole frame, the cathode side pole frame and the cathode stamping bipolar plate are connected by a plurality of bolts passing through a plurality of connection holes.

[0016] When the anode stamping bipolar plate, the anode side pole frame, the cathode side pole frame, and the cathode stamping bipolar plate are connected by a plurality of bolts passing through a plurality of connection holes, the anode side pole frame and the cathode side pole frame are arranged at 90 degrees.

[0017] The pole frame is made of polyphenylene sulfide, polyvinyl chloride, polypropylene, polytetrafluoroethylene, polysulfone or polyphenylsulfone.

[0018] The technical solution of the present invention is adopted, and the working principle and beneficial effects are as follows:

[0019] The hydrogen production electrolyzer structure described in the present invention, when the structure is set, the pole frame is between the pole plate and the membrane electrode in the electrolyzer structure, and the pole frame includes two, which are used to separate the cathode and the anode to prevent the two poles from directly contacting and short-circuiting, and provide a support structure for the pole plate and the membrane electrode. The pole frame can control the distance between the two poles, optimize the electric field distribution of the electrolysis reaction, guide the flow direction of the electrolyte and the gas, and control the compression of the gas diffusion layer and the internal area of ​​the internal electrolyzer. The hollow area in the middle of each pole frame is used to arrange the flow channel and place the gas diffusion layer. The screw mouth on the back of the pole frame has a concave and convex platform as an anti-fool structure. The flow guide structure of the pole frame flow channel is used to connect with the pole frame through which the liquid passes. The flow guide structure is lengthened to become a support structure for supporting the gas diffusion layer. Under the action of the installation pressure, there will be a force on the gas diffusion layer toward the membrane electrode, resulting in the membrane electrode being squeezed and torn, and irreversible damage to the catalyst on the membrane electrode. The support structure can prevent the above problems from occurring. The flow openings on both sides of the flow guide structure of each pole frame are used for the gas or liquid flowing through the anode or cathode where the pole frame is located in the electrolyzer, and the flow openings of each pole frame without a flow guide structure are used for the liquid flowing through the other pole or the generated gas. In order to avoid problems in the assembly of the pole frame, a fool-proof structure is set near the connection hole on the side of the pole frame facing the membrane electrode side. The fool-proof structure includes a convex plane and a concave plane. When the structure is connected, the reverse sides of the anode side pole frame and the cathode side pole frame are opposite, and one of the pole frames is rotated horizontally by 90°, so that the concave platform and the convex platform of the anode side pole frame and the cathode side pole frame can be embedded to achieve correct installation. Therefore, in the assembly of the electrolyzer, the membrane electrode is placed between the two pole frames, and the positioning pins in the positioning holes are used to fix the anode side pole frame and the cathode side pole frame. The anode stamping bipolar plate and the cathode stamping bipolar plate are placed on the outside of the two pole frames respectively, and the same size gas diffusion layer is placed in the hollowed-out part in the middle of the pole frame. When the pole frame is in the anode, the anode flow channel of the anode stamping bipolar plate is arranged in parallel with the flow channel of the guide structure of the anode side pole frame; when the pole frame is in the cathode as the cathode side pole frame, the cathode flow channel of the cathode stamping bipolar plate is arranged perpendicular to the flow channel of the guide structure of the cathode side pole frame. In this way, when the electrolyzer is running, it is ensured that the cathode gas and the anode gas liquid flow directions are perpendicular and do not intersect, and pass through the flow channel openings in different directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following is a brief description of the contents and symbols in the drawings of this specification:

[0021] Figure 1 It is a front structural schematic diagram of the pole frame of the hydrogen production electrolyzer structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the back structure of the pole frame of the hydrogen production electrolyzer structure of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the front sealing member of the pole frame of the hydrogen production electrolyzer structure according to the present invention;

[0024] Figure 4 It is a structural schematic diagram of the back seal of the pole frame of the hydrogen production electrolyzer structure according to the present invention;

[0025] Figure 5 It is a schematic structural diagram of the polar frame front surface and the polar frame front surface seal after vulcanization of the hydrogen production electrolyzer structure of the present invention;

[0026] Figure 6 It is a schematic structural diagram of the back side of the pole frame and the back side sealing member of the hydrogen production electrolyzer structure of the present invention after vulcanization;

[0027] Figure 7 It is a schematic diagram of the explosion structure when the hydrogen production electrolyzer structure of the present invention is assembled;

[0028] The marks in the accompanying drawings are respectively: 1. anode stamped bipolar plate; 2. anode side pole frame; 3. cathode side pole frame; 4. membrane electrode and gas diffusion layer; 5. cathode stamped bipolar plate; 6. concave platform; 7. convex platform; 8. supporting structure; 9. flow guide structure; 10. connecting hole; 11. recessed structure; 12. pole frame front seal; 13. positioning hole; 14. pole frame flow channel opening; 15 pole frame back seal. DETAILED DESCRIPTION

[0029] The following is a further detailed description of the specific implementation of the present invention, such as the shape, structure, mutual position and connection relationship between the various components involved, the function and working principle of each part, etc., through the description of the embodiments with reference to the accompanying drawings:

[0030] As attached Figure 1 -Attached Figure 7As shown, the present invention is a hydrogen production electrolyzer structure, the pole frame includes an anode side pole frame 2 and a cathode side pole frame 3, the anode side pole frame 2 and the cathode side pole frame 3 have the same structure, a support structure 8 and a guide structure 9 are arranged near the inner side of the front side of the pole frame, a concave platform 6 is arranged near one side of the back side of the pole frame, and a convex platform 7 is arranged near the other side of the back side of the pole frame. When the structure is arranged, a convex platform 7 can also be arranged near one side of the back side of the pole frame, and a concave platform 6 can be arranged near the other side of the back side of the pole frame. When the anode side pole frame 2 and the cathode side pole frame 3 are arranged, the anode side pole frame 2 is located inside the anode stamping bipolar plate 1, and the cathode side pole frame 3 is located inside the cathode stamping bipolar plate 5. The anode flow channel of the anode stamping bipolar plate 1 is arranged in parallel with the flow channel of the guide structure 9 of the anode side pole frame 2; the cathode flow channel of the cathode stamping bipolar plate 5 is arranged vertically with the flow channel of the guide structure 9 of the cathode side pole frame 3; the convex platform 7 of the anode side pole frame 2 is buckled with the concave platform 6 of the cathode side pole frame 3, and the concave platform 6 of the anode side pole frame 2 is buckled with the convex platform 7 of the cathode side pole frame 3. The above structure proposes an improved technical solution for the deficiencies in the prior art. When the structure is set up, the pole frame is located between the pole plate and the membrane electrode in the electrolytic cell structure. The pole frame includes two parts, which are used to separate the cathode and the anode to prevent the two poles from directly contacting each other and causing a short circuit. At the same time, it provides a supporting structure for the pole plate and the membrane electrode. The pole frame can control the distance between the two poles, optimize the electric field distribution of the electrolysis reaction, guide the flow direction of the electrolyte and gas, and control the compression of the gas diffusion layer and the internal area of ​​the internal electrolytic cell. Figure 1 It is the front side of the pole frame, facing the pole plate. Figure 2 It is the reverse side of the pole frame, facing the membrane electrode. The hollow area in the middle of each pole frame is used to arrange the flow channel and place the gas diffusion layer. The screw hole on the reverse side of the pole frame has a concave and convex platform as an anti-fool structure. The flow guide structure of the pole frame flow channel is used to connect with the pole frame on the liquid side. The flow guide structure is lengthened to become a support structure, which is used to support the gas diffusion layer. Under the action of the installation pressure, there will be a force on the gas diffusion layer toward the membrane electrode, causing the membrane electrode to be squeezed and torn, and irreversible damage to the catalyst on the membrane electrode. The support structure can prevent the above problems from occurring. The flow channel openings on both sides of the flow guide structure of each pole frame are used for the gas or liquid passing through the anode or cathode where the pole frame is located in the electrolyzer, and the flow channel openings on the other two sides of the flow guide structure of each pole frame are used for the liquid passing through the other pole or the gas generated. In order to avoid problems in the pole frame assembly, a foolproof structure is set near the connection hole on the pole frame side facing the membrane electrode side. The foolproof structure includes a convex plane and a concave plane. When the structure is connected, the anode side pole frame 2 and the cathode side pole frame 3 face each other on the reverse side, and one of the pole frames is horizontally rotated 90°, so that the concave platform and convex platform of the anode side pole frame 2 and the cathode side pole frame 3 can be embedded and correctly installed. Therefore, if Figure 5As shown, in the assembly of the electrolyzer, the membrane electrode is placed between the two pole frames, and the positioning pins in the positioning holes are used to fix the anode side pole frame 2 and the cathode side pole frame 3. The anode stamping bipolar plate 1 and the cathode stamping bipolar plate 5 are respectively placed outside the two pole frames, and the same size gas diffusion layer is placed in the hollowed-out part in the middle of the pole frame. When the pole frame is in the cathode, the anode flow channel of the anode stamping bipolar plate 1 is arranged in parallel with the flow channel of the guide structure 9 of the anode side pole frame 2; when the pole frame is in the cathode as the cathode side pole frame 3, the cathode flow channel of the cathode stamping bipolar plate 5 is arranged vertically with the flow channel of the guide structure 9 of the cathode side pole frame 3. In this way, when the electrolyzer is running, it is ensured that the cathode gas and the anode gas liquid flow directions are perpendicular and do not intersect, and pass through flow channel openings in different directions. The hydrogen production electrolyzer structure described in the present invention has a simple structure and can provide a pole frame suitable for both the positive and negative poles; the pole frame structure and the double-sided vulcanized seal have the function of protecting the membrane electrode, effectively preventing the assembly pressure from squeezing the gas diffusion layer and causing the gas diffusion layer to tear the membrane electrode; the pole frame has an anti-fool structure to ensure the correct installation of the pole frame, improve the overall performance, and avoid malfunctions or failures caused by assembly errors.

[0031] The pole frame is provided with a plurality of connection holes 10 near the outer side, and a membrane electrode and a gas diffusion layer 4 are provided between the anode side pole frame 2 and the cathode side pole frame 3. In the above structure, the pole frame is provided with a plurality of connection holes, and the anode stamping bipolar plate 1 and the cathode stamping bipolar plate 5 are also provided with connection holes, respectively, so that when the electrolytic cell is assembled, it is convenient for screws to pass through the connection holes, which plays a role in fixing the structure.

[0032] The inner side of the pole frame is provided with a recessed structure 11, and the front side of the recessed structure 11 is provided with a pole frame flow channel opening 14, a support structure 8 and a flow guide structure 9. In the above structure, the recessed structure 11 is provided on both the front and back sides of the pole frame, and a pole frame front seal 12 is provided on the front side of the recessed structure 11 on each side, and a pole frame back seal 15 is provided on the back side of the recessed structure 11 on each side.

[0033] The front side pole frame 2 of the anode side is provided with a support structure 8 and a guide structure 9 near the inner side, the back side pole frame 2 of the anode side is provided with a concave platform 6 near one side, and the back side pole frame 2 of the anode side is provided with a convex platform 7 near the inner side of the other side. The front side pole frame 3 of the cathode side is provided with a support structure 8 and a guide structure 9 near the inner side, the back side pole frame 3 of the cathode side is provided with a concave platform 6 near one side, and the back side pole frame 2 of the anode side is provided with a convex platform 7 near the inner side of the other side. In the above structure, the back side pole frame 2 of the anode side is provided with a concave platform 6 and the back side pole frame 3 of the cathode side is provided with a convex platform 7 respectively. When connected, the anode side pole frame 2 and the cathode side pole frame 3 must be offset by 90° to ensure accurate embedding.

[0034] The front side of the recessed structure 11 of the anode side pole frame 2 of the pole frame is vulcanized to set the pole frame front seal 12, the back side of the recessed structure 11 of the anode side pole frame 2 is vulcanized to set the pole frame back seal 15, the front side of the recessed structure 11 of the cathode side pole frame 3 is vulcanized to set the pole frame front seal 12, and the back side of the recessed structure 11 of the cathode side pole frame 3 is vulcanized to set the pole frame back seal 15. The structure of the seal is as follows: Figure 3 , Figure 4 As shown in the figure, the front seal of the pole frame plays the role of sealing the space between the membrane electrode and the pole frame, and the back seal of the pole frame plays the role of sealing the space between the pole frames. The structure of the pole frame and the seal after vulcanization is as follows Figure 5 , Figure 6 As shown, the seal is conveniently arranged and has reliable performance, which effectively solves the problem of electrolytic cell failure caused by sealing problems.

[0035] The recessed structure 11 of the pole frame is also provided with a positioning hole 13. In the above structure, the positioning hole is used to insert a positioning pin to achieve positioning and fixing between the pole frame and the membrane electrode.

[0036] The anode stamping bipolar plate 1, the anode side pole frame 2, the cathode side pole frame 3, and the cathode stamping bipolar plate 5 are connected by multiple bolts passing through multiple connection holes 10. When the anode stamping bipolar plate 1, the anode side pole frame 2, the cathode side pole frame 3, and the cathode stamping bipolar plate 5 are connected by multiple bolts passing through multiple connection holes 10, the anode side pole frame 2 and the cathode side pole frame 3 are set at 90°. The above structure needs to be divided into the anode side pole frame 2 and the cathode side pole frame 3 when the electrolytic cell is assembled, and the anode side pole frame 2 and the cathode side pole frame 3 have the same structure, but need to be misaligned during installation, so there is no need to make differentiated anode side pole frames 2 and cathode side pole frames 3, saving costs, and the anode side pole frame 2 and the cathode side pole frame 3 will not be installed incorrectly.

[0037] The pole frame is made of polyphenylene sulfide, polyvinyl chloride, polypropylene, polytetrafluoroethylene, polysulfone or polyphenylsulfone. In the above structure, the pole frame is made of plastic material that is insulating, high-voltage resistant, wear-resistant, corrosion-resistant and has excellent mechanical properties, and the performance meets the use requirements. At the same time, the material of the pole frame can also be other materials with the same physical properties and processing performance.

[0038] In the electrolytic cell structure described in the present invention, the pole frame has a fool-proof structure of a concave platform and a convex platform. Only when the two pole frames are installed correctly can they fit together, effectively avoiding installation errors; when the electrolytic cell is assembled, the seals vulcanized on the front and back sides of the pole frames can play a sealing role by pressing, and the seals vulcanized on the pole frames are easy to assemble; the structure of the pole frame fixes the position of the gas diffusion layer, and the supporting structure supports the composite diffusion layer titanium felt, protects the membrane electrode and facilitates assembly.

[0039] The hydrogen production electrolyzer structure described in the present invention is configured such that the pole frame is located between the pole plate and the membrane electrode in the electrolyzer structure. The pole frame includes two pole frames, which are used to separate the cathode and the anode to prevent the two poles from directly contacting each other and causing a short circuit. At the same time, the pole frame provides a support structure for the pole plate and the membrane electrode. The pole frame can control the distance between the two poles, optimize the electric field distribution of the electrolysis reaction, guide the flow direction of the electrolyte and the gas, and control the compression of the gas diffusion layer and the internal area of ​​the internal electrolyzer. Figure 1 It is the front side of the pole frame, facing the pole plate. Figure 2 It is the reverse side of the pole frame, facing the membrane electrode. The hollow area in the middle of each pole frame is used to arrange the flow channel and place the gas diffusion layer. The screw hole on the reverse side of the pole frame has a concave and convex platform as an anti-fool structure. The flow guide structure of the pole frame flow channel is used to connect with the pole frame on the liquid side. The flow guide structure is lengthened to become a support structure, which is used to support the gas diffusion layer. Under the action of the installation pressure, there will be a force on the gas diffusion layer toward the membrane electrode, causing the membrane electrode to be squeezed and torn, and irreversible damage to the catalyst on the membrane electrode. The support structure can prevent the above problems from occurring. The flow channel openings on both sides of the flow guide structure of each pole frame are used for the gas or liquid passing through the anode or cathode where the pole frame is located in the electrolyzer, and the flow channel openings on the other two sides of the flow guide structure of each pole frame are used for the liquid passing through the other pole or the gas generated. In order to avoid problems in the pole frame assembly, a foolproof structure is set near the connection hole on the pole frame side facing the membrane electrode side. The foolproof structure includes a convex plane and a concave plane. When the structure is connected, the anode side pole frame 2 and the cathode side pole frame 3 face each other on the reverse side, and one of the pole frames is horizontally rotated 900°, so that the concave platform and convex platform of the anode side pole frame 2 and the cathode side pole frame 3 can be embedded and correctly installed. Figure 5 As shown, in the assembly of the electrolyzer, the membrane electrode is placed between the two pole frames, the positioning pins in the positioning holes are used to fix the anode side pole frame 2 and the cathode side pole frame 3, the anode stamping bipolar plate 1 and the cathode stamping bipolar plate 5 are respectively placed outside the two pole frames, and the same size gas diffusion layer is placed in the hollowed-out part in the middle of the pole frame. When the pole frame is in the cathode, the anode flow channel of the anode stamping bipolar plate 1 is arranged in parallel with the flow channel of the guide structure 9 of the anode side pole frame 2; when the pole frame is in the cathode as the cathode side pole frame 3, the cathode flow channel of the cathode stamping bipolar plate 5 is arranged vertically with the flow channel of the guide structure 9 of the cathode side pole frame 3. In this way, when the electrolyzer is running, it is ensured that the cathode gas and the anode gas liquid flow directions are vertical and do not intersect, and pass through flow channel openings in different directions.

[0040] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A hydrogen production electrolyzer structure, characterized in that: The pole frame comprises an anode side pole frame (2) and a cathode side pole frame (3). The anode side pole frame (2) and the cathode side pole frame (3) have the same structure. A support structure (8) and a flow guide structure (9) are arranged near the inner side of the front side of the pole frame. A concave platform (6) is arranged near one side of the back side of the pole frame. A convex platform (7) is arranged near the other side of the back side of the pole frame. When the anode side pole frame (2) and the cathode side pole frame (3) are arranged, the anode side pole frame (2) is located inside the anode stamping bipolar plate (1), and the cathode side pole frame (3) is located inside the cathode stamping bipolar plate (1). On the inner side of the anode stamping bipolar plate (5), the anode flow channel of the anode stamping bipolar plate (1) and the flow channel of the guide structure (9) of the anode side pole frame (2) are arranged in parallel; the cathode flow channel of the cathode stamping bipolar plate (5) and the flow channel of the guide structure (9) of the cathode side pole frame (3) are arranged perpendicularly; the convex platform (7) of the anode side pole frame (2) and the concave platform (6) of the cathode side pole frame (3) are buckled, and the concave platform (6) of the anode side pole frame (2) and the convex platform (7) of the cathode side pole frame (3) are buckled.

2. The hydrogen production electrolyzer structure according to claim 1, characterized in that: A plurality of connection holes (10) are arranged near the outer side of the pole frame, and a membrane electrode and a gas diffusion layer (4) are arranged between the anode side pole frame (2) and the cathode side pole frame (3).

3. The hydrogen production electrolyzer structure according to claim 1 or 2, characterized in that: A recessed structure (11) is arranged on the inner side of the pole frame, and a pole frame flow channel opening (14), a supporting structure (8) and a flow guide structure (9) are arranged on the front side of the recessed structure (11).

4. The hydrogen production electrolyzer structure according to claim 1 or 2, characterized in that: A support structure (8) and a flow guide structure (9) are arranged near the inner side of the front face of the anode side pole frame (2); a concave platform (6) is arranged near the middle connection opening (10) on the flow guide structure side of the back face of the anode side pole frame (2); and a convex platform (7) is arranged at the middle connection opening (10) on the back face of the anode side pole frame (2) without the flow guide structure.

5. The hydrogen production electrolyzer structure according to claim 1 or 2, characterized in that: A support structure (8) and a flow guiding structure (9) are arranged near the inner side of the front face of the cathode side pole frame (3); a concave platform (6) is arranged near the middle connection opening (10) on the flow guiding structure side of the back face of the cathode side pole frame (3); and a convex platform (7) is arranged at the middle connection opening (10) on the side without the flow guiding structure of the back face of the anode side pole frame (2).

6. The hydrogen production electrolyzer structure according to claim 3, characterized in that: The front side of the recessed structure (11) of the pole frame (2) on the anode side is vulcanized to provide a pole frame front seal (12), and the back side of the recessed structure (11) of the pole frame (2) on the anode side is vulcanized to provide a pole frame back seal (15); the front side of the recessed structure (11) of the pole frame (3) on the cathode side is vulcanized to provide a pole frame front seal (12), and the back side of the recessed structure (11) of the pole frame (3) on the cathode side is vulcanized to provide a pole frame back seal (15).

7. The hydrogen production electrolyzer structure according to claim 6, characterized in that: A positioning hole (13) is also provided on the recessed structure (11) of the pole frame.

8. The hydrogen production electrolyzer structure according to claim 1 or 2, characterized in that: The anode stamped bipolar plate (1), the anode side pole frame (2), the cathode side pole frame (3), and the cathode stamped bipolar plate (5) are connected by a plurality of bolts passing through a plurality of connection holes (10).

9. The hydrogen production electrolyzer structure according to claim 2, characterized in that: When the anode stamped bipolar plate (1), the anode side pole frame (2), the cathode side pole frame (3), and the cathode stamped bipolar plate (5) are connected by a plurality of bolts passing through a plurality of connection holes (10), the anode side pole frame (2) and the cathode side pole frame (3) are arranged at 90 degrees.

10. The hydrogen production electrolyzer structure according to claim 1 or 2, characterized in that: The pole frame is made of polyphenylene sulfide, polyvinyl chloride, polypropylene, polytetrafluoroethylene, polysulfone or polyphenylsulfone.

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