Side plate structure for AEM water electrolysis hydrogen production

Abstract

The utility model relates to the technical field of water electrolysis hydrogen production, and provides an AEM water electrolysis hydrogen production side plate structure which comprises a side plate, a liquid inlet plate, an electrode and four liquid inlet and outlet pipelines, a liquid inlet plate is fixedly connected to the side plate; the side plate is provided with a side plate main body part; a side plate through groove is formed in the side plate main body part; side plate through holes are respectively formed in four corners of the side plate main body part; a groove is formed in the liquid inlet plate; a liquid inlet plate through groove is formed in the liquid inlet plate; liquid inlet plate through holes are respectively formed in four corners of the liquid inlet plate; the electrode is provided with an electrode plane and an electrode wiring part fixedly connected with the electrode plane; the electrode plane is arranged in the groove; the electrode wiring part penetrates through the side plate through groove and the liquid inlet plate through groove and extends downwards from the side plate main body part; and the four liquid inlet and outlet pipelines are respectively arranged in the through holes of the liquid inlet plate. The side plate only provides a structure supporting effect, is not electrified and is not in contact with alkali liquor, so that the side plate is prevented from being corroded, and the safety risk is reduced.

Description

Technical Field

[0001] This utility model relates to the field of water electrolysis for hydrogen production technology, and in particular to a side plate structure for AEM water electrolysis for hydrogen production. Background Technology

[0002] Anion exchange membrane (AEM) water electrolysis for hydrogen production uses anion exchange membranes as the diaphragm in the electrolyzer to electrolyze water into hydrogen and oxygen, and is one of the more advanced water electrolysis technologies currently available. The flow path of the electrolyte within the electrolyzer is primarily achieved through the flow channel design of the internal flow channel plate. During the operation of the electrolyzer, the design and manufacturing of the flow channel plate directly affect its lifespan and electrolysis efficiency. The electrolyzer design needs to consider the effects of bypass current and coulombic efficiency. Since the electrolyte flows directly into the reaction chamber, a large common flow channel and a smaller cross-sectional area for the distribution pipeline between the common flow channel and the individual cells are required. While keeping the electrolyte common flow channel and the distribution pipeline connecting the common flow channel and the individual cells unchanged, measures such as increasing the area of ​​the individual cells through which the effective current flows, reducing the impedance of the main cell pathway, and increasing the current density can significantly reduce the ratio of the resistance of the effective current path to the resistance of the bypass current path, reduce charge loss caused by the bypass current, and improve the cell coulombic efficiency.

[0003] CN 118480793 A discloses the structure of an anion exchange membrane electrolyzer with gas-liquid separation function. Its anode plate is also the side plate of the electrolyzer. After the anode electrode is energized, the entire anode plate becomes charged, and the electrolyte flow channel is directly on the anode plate. Before flowing to the membrane electrode reaction, the electrolyte directly contacts and reacts with the anode plate. However, this patent directly energizes the side plate as the electrode. This method of energization means the side plate directly participates in the electrolysis reaction, posing significant safety hazards. With the side plate energized, the entire exterior of the electrolyzer is at risk of electric shock, short circuits, and energy loss. Furthermore, the electrolyte in anion exchange membrane electrolyzers is generally alkaline; under the combined influence of high current density and alkaline solution, corrosion of the side plate is unavoidable. Additionally, the flow channel within the side plate does not consider bypass current and coulombic efficiency; the electrolyte flows directly into the reaction chamber without a large common flow channel or a distribution pipeline between the common flow channel and the individual cells. Utility Model Content

[0004] This invention primarily addresses the technical problems of existing technologies where the side plate is directly connected to electricity, causing it to directly participate in the electrolysis reaction, posing significant safety hazards and making the side plate prone to corrosion. It proposes a side plate structure for AEM water electrolysis to produce hydrogen, where the side plate only provides structural support, is not connected to electricity, does not come into contact with alkaline solutions, does not participate in the reaction, avoids corrosion of the side plate, and reduces safety risks.

[0005] This utility model provides a side plate structure for AEM electrolysis of water to produce hydrogen, including: a side plate, a liquid inlet plate, an electrode and four liquid inlet and outlet pipes;

[0006] The liquid inlet plate is fixedly connected to the side plate;

[0007] The side plate has a main body; a side plate through groove is formed on the main body; and side plate through holes are formed at the four corners of the main body.

[0008] The liquid inlet plate is provided with a groove; the liquid inlet plate is provided with a through groove; and the liquid inlet plate is provided with through holes at the four corners of the liquid inlet plate.

[0009] The electrode has an electrode plane and an electrode wiring portion fixedly connected to the electrode plane; the electrode plane is disposed in a groove; the electrode wiring portion passes through the side plate through groove and the liquid inlet plate through groove, and extends downward from the side plate main body;

[0010] Four inlet and outlet pipes are installed in the through holes of the inlet plate.

[0011] Preferably, a side plate sleeve is fixedly installed below each side plate through hole; the side plate sleeve is fitted over the corresponding inlet / outlet liquid pipe.

[0012] Preferably, a side plate flange is provided at the bottom end of the side plate sleeve;

[0013] The bottom surface of the side plate flange has mounting grooves for inlet and outlet liquid pipe flanges.

[0014] Preferably, the inlet / outlet pipe has an inlet / outlet pipe body and an inlet / outlet pipe flange fixedly disposed below the inlet / outlet pipe body;

[0015] The inlet and outlet liquid pipe flanges are embedded in the side plate flanges.

[0016] Preferably, the side plate is made of metal.

[0017] The side plate is square in shape, with a thickness of 38-50mm and an area of ​​670*650-750*730mm.

[0018] Preferably, the inner diameter of the side plate sleeve is 29-41 mm and the outer diameter is 34.5-46.5 mm;

[0019] The inner diameter of the side plate flange is 23-35mm, and the outer diameter is 49-61mm;

[0020] The inner diameter of the flange mounting groove for the inlet and outlet liquid pipelines is 41.5-53.5 mm, and the depth is 3-7 mm.

[0021] The area of ​​the side plate through groove is 110*24-190*41mm.

[0022] Preferably, the inner diameter of the inlet and outlet pipes is 23-35 mm, and the outer diameter is 28-40 mm;

[0023] The inner diameter of the inlet / outlet pipe flange is 23-35mm, and the outer diameter is 40.5-52.5mm.

[0024] Preferably, the liquid inlet plate is made of engineering plastic;

[0025] The liquid inlet plate is square in shape, with a thickness of 18-30mm and an area of ​​580*560-660*550mm.

[0026] Preferably, the inner diameter of the through hole in the liquid inlet plate is 23-35 mm and the outer diameter is 28-40 mm;

[0027] The groove has a depth of 3-7mm and an area of ​​420*310-500*390mm;

[0028] The area of ​​the inlet plate groove is 110*24-190*41mm.

[0029] Preferably, the area of ​​the electrode plane is 419*309-499*389mm;

[0030] The area of ​​the electrode wiring part is 100*10-150*24mm, and the length of the electrode wiring part extending from the main body of the side plate is 103-120mm.

[0031] The side plate structure for AEM electrolysis of water to produce hydrogen provided by this utility model has the following advantages compared with the prior art:

[0032] 1. The side plate of this invention only provides structural support, is not connected to electricity, does not come into contact with the alkaline solution, and does not participate in the reaction. This design avoids the corrosion problem of the side plate and improves its stability. The internal electrodes are connected to electricity, making the external structure of the electrolytic cell non-energized, reducing the safety risks of electric shock, short circuits, etc. It also avoids energy loss to a certain extent.

[0033] 2. The inlet and outlet pipes of a certain length are set on the liquid inlet plate of the liner on the side plate, providing a large common flow channel. While keeping the electrolyte common flow channel and the distribution pipeline structure connecting the common flow channel to the single cell unchanged, the area of ​​the single cell through which the effective current flows is increased, the influence of bypass current is reduced, and the coulombic efficiency is improved.

[0034] 3. The design of larger-sized electrolyzer side plates provides a solution for the construction of industrial-scale high-power AEM electrolysis water electrolysis to produce hydrogen. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the side plate structure of the AEM electrolysis water hydrogen production method provided by this utility model. Figure 1 ;

[0036] Figure 2 This is a schematic diagram of the side plate structure of the AEM electrolysis water hydrogen production method provided by this utility model. Figure 2 ;

[0037] Figure 3 This is an exploded schematic diagram of the side plate structure of the AEM water electrolysis hydrogen production method provided by this utility model;

[0038] Figure 4 This is a cross-sectional view of the side plate structure of the AEM water electrolysis hydrogen production method provided by this utility model (cross-section along the line connecting the through holes of the side plate);

[0039] Figure 5 This is a cross-sectional view of the electrode provided by this utility model.

[0040] Reference numerals: 1. Side plate; 2. Inlet / outlet pipe; 3. Inlet plate; 4. Electrode; 101. Side plate main body; 102. Side plate sleeve; 103. Side plate flange; 104. Side plate through hole; 105. Side plate electrode through hole; 201. Inlet / outlet pipe main body; 202. Inlet / outlet pipe flange; 301. Groove; 302. Inlet plate through hole; 303. Inlet plate electrode through hole; 401. Electrode plane; 402. Electrode wiring part. Detailed Implementation

[0041] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0042] like Figure 1-5 As shown in the figure, the side plate structure of the AEM electrolysis water hydrogen production provided by this utility model embodiment includes: side plate 1, liquid inlet plate 3, electrode 4 and four liquid inlet and outlet pipes 2.

[0043] The side plate 1 is fixedly connected to the liquid inlet plate 3. The side plate 1 is made of metal, specifically high-strength, corrosion-resistant metal materials including but not limited to 316, 316L, and 304 stainless steel. The liquid inlet plate 3 is made of engineering plastic and manufactured through injection molding. Specifically, the liquid inlet plate 3 is made of high-strength engineering plastics, including but not limited to polycarbonate (PC), polyoxymethylene (POM), nylon, polyphenylene sulfide (PPS), polyphenylene oxide (PPO), polybutylene terephthalate (PBT), polyethylene (PE), and polypropylene (PP). Both the side plate 1 and the liquid inlet plate 3 have multiple threaded holes, and the liquid inlet plate 3 is tightly fixed to the side plate 1 with screws, with its contact surface being flat.

[0044] The side plate 1 has a side plate main body 101; a side plate through groove 105 is provided on the side plate main body 101, and the side plate through groove 105 is a strip groove; side plate through holes 104 are respectively provided at the four corners of the side plate main body 101.

[0045] The liquid inlet plate 3 is provided with a groove 301; the liquid inlet plate 3 is provided with a liquid inlet plate through groove 303, which is a strip groove; and the liquid inlet plate through hole 302 is provided at the four corners of the liquid inlet plate 3.

[0046] The electrode 4 has a T-shaped structure. For example... Figure 5 As shown, the electrode 4 has an electrode plane 401 and an electrode wiring portion 402 fixedly connected to the electrode plane 401; the electrode plane 401 is disposed in the groove 301, and the electrode plane 401 is just fitted into the groove 301 to form a plane; the electrode wiring portion 402 passes through the side plate through groove 105 and the liquid inlet plate through groove 303, and extends downward from the side plate main body 101; the electrode wiring portion 402 has three reserved power connection holes. The electrode 4 is connected to the power supply through the reserved power connection holes.

[0047] Four inlet and outlet pipes 2 are respectively installed in the inlet plate through holes 302. The inlet and outlet pipes 2 are for the entry and exit of electrolyte and hydrogen and oxygen. A side plate sleeve 102 is fixedly installed below each side plate through hole 104; the side plate sleeve 102 is fitted over the corresponding inlet and outlet pipe 2, that is, the inlet and outlet pipe 2 is embedded in the side plate sleeve 102 and fits tightly. A side plate flange 103 is provided at the bottom end of the side plate sleeve 102; the bottom surface of the side plate flange 103 has an inlet and outlet pipe flange mounting groove.

[0048] The inlet / outlet pipe 2 has an inlet / outlet pipe main body 201 and an inlet / outlet pipe flange 202 fixedly installed below the inlet / outlet pipe main body 201; the inlet / outlet pipe flange 202 is embedded in the side plate flange 103, specifically in the inlet / outlet pipe flange mounting groove.

[0049] The parameters of the side plate structure for AEM electrolysis of water to produce hydrogen in this invention are as follows:

[0050] The side plate 1 is square in shape, with a thickness of 38-50mm and an area of ​​670*650-750*730mm.

[0051] The inner diameter of the side plate sleeve 102 is 29-41mm, and the outer diameter is 34.5-46.5mm; the inner diameter of the side plate flange 103 is 23-35mm, and the outer diameter is 49-61mm; the inner diameter of the inlet / outlet liquid pipe flange mounting groove is 41.5-53.5mm, and the depth is 3-7mm; the area of ​​the side plate through groove 105 is 110*24-190*41mm.

[0052] The inner diameter of the inlet / outlet pipe 2 is 23-35mm, and the outer diameter is 28-40mm. The inner diameter of the inlet / outlet pipe flange 202 is 23-35mm, and the outer diameter is 40.5-52.5mm.

[0053] The liquid inlet plate 3 is square in shape, with a thickness of 18-30mm and an area of ​​580*560-660*550mm. The inner diameter of the liquid inlet plate through hole 302 is 23-35mm, and the outer diameter is 28-40mm; the depth of the groove 301 is 3-7mm, and the area is 420*310-500*390mm; the area of ​​the liquid inlet plate through groove 303 is 110*24-190*41mm.

[0054] The area of ​​the electrode plane 401 is 419*309-499*389mm; the area of ​​the electrode wiring part 402 is 100*10-150*24mm; and the length of the electrode wiring part 402 extending from the side plate main body 101 is 103-120mm.

[0055] The distance between the center of the inlet / outlet pipe 2 and both sides of the side plate 2 is 128-135 mm.

[0056] In assembling this novel side plate structure, the inlet / outlet pipe flange 202 and the main body 201 of the inlet / outlet pipe are first welded together using plastic welding. Then, the main body 201 of the inlet / outlet pipe is embedded into the side plate sleeve 102 of the side plate 1. The fixed-position main body 201 of the inlet / outlet pipe and the inlet plate 3 are then welded together using plastic welding. Finally, the inlet plate 3 and the side plate 1 are tightened with screws through the pre-drilled screw holes. The side plate 1 and the inlet plate 3 form a single unit.

[0057] This invention welds the side plate main body 101, side plate sleeve 102, and side plate flange 103 into a single unit. The welded side plate 2 only provides structural support; it is not connected to electricity, does not contact the alkaline solution, and does not participate in the reaction. This design avoids corrosion problems. The internal electrode 4 provides electricity, ensuring the external structure of the electrolyzer is not electrified, reducing the risk of electric shock and short circuits, and also minimizing energy loss. The inlet plate 3 has embedded inlet and outlet pipes 2 of a certain length and a large-area groove 301 as a reaction area, giving the side plate structure a larger common flow channel. This increases the effective current flow area of ​​the single cell while maintaining the common electrolyte flow channel and the distribution pipeline connecting the common flow channel to the single cell, reducing the impact of bypass current and improving coulombic efficiency. The larger-sized electrolyzer side plate design provides a solution for the construction of industrial high-power AEM water electrolysis for hydrogen production.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some or all of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A side plate structure for AEM electrolysis of water to produce hydrogen, characterized in that, include: Side plate (1), liquid inlet plate (3), electrode (4) and four liquid inlet and outlet pipes (2); The liquid inlet plate (3) is fixedly connected to the side plate (1); The side plate (1) has a side plate main body (101); a side plate through groove (105) is provided on the side plate main body (101); and side plate through holes (104) are respectively provided at the four corners of the side plate main body (101). The liquid inlet plate (3) is provided with a groove (301); the liquid inlet plate (3) is provided with a liquid inlet plate through groove (303); and liquid inlet plate through holes (302) are provided at the four corners of the liquid inlet plate (3); The electrode (4) has an electrode plane (401) and an electrode wiring portion (402) fixedly connected to the electrode plane (401); the electrode plane (401) is disposed in a groove (301); the electrode wiring portion (402) passes through the side plate through groove (105) and the liquid inlet plate through groove (303) and extends downward from the side plate main body portion (101); Four liquid inlet and outlet pipes (2) are installed in the liquid inlet plate through hole (302) respectively.

2. The side plate structure for AEM water electrolysis hydrogen production according to claim 1, characterized in that, A side plate sleeve (102) is fixedly installed below each side plate through hole (104); the side plate sleeve (102) is sleeved on the outside of the corresponding inlet / outlet liquid pipe (2).

3. The side plate structure for AEM water electrolysis hydrogen production according to claim 2, characterized in that, The bottom end of the side plate sleeve (102) is provided with a side plate flange (103); The bottom surface of the side plate flange (103) has a mounting groove for the inlet and outlet liquid pipe flanges.

4. The side plate structure for AEM water electrolysis hydrogen production according to claim 3, characterized in that, The inlet and outlet pipe (2) has an inlet and outlet pipe main body (201) and an inlet and outlet pipe flange (202) fixedly installed below the inlet and outlet pipe main body (201); The inlet / outlet pipe flange (202) is embedded in the side plate flange (103).

5. The side plate structure for AEM water electrolysis hydrogen production according to claim 1, characterized in that, The side plate (1) is made of metal. The side plate (1) is square in shape, with a thickness of 38-50mm and an area of ​​670*650-750*730mm.

6. The side plate structure for AEM water electrolysis to produce hydrogen according to claim 3, characterized in that, The inner diameter of the side plate sleeve (102) is 29-41 mm, and the outer diameter is 34.5-46.5 mm; The inner diameter of the side plate flange (103) is 23-35mm, and the outer diameter is 49-61mm; The inner diameter of the flange mounting groove for the inlet and outlet liquid pipelines is 41.5-53.5 mm, and the depth is 3-7 mm. The area of ​​the side plate through groove (105) is 110*24-190*41mm.

7. The side plate structure for AEM electrolysis of water to produce hydrogen according to claim 4, characterized in that, The inner diameter of the inlet / outlet pipe (2) is 23-35 mm, and the outer diameter is 28-40 mm; The inner diameter of the inlet / outlet pipe flange (202) is 23-35mm, and the outer diameter is 40.5-52.5mm.

8. The side plate structure for AEM water electrolysis to produce hydrogen according to claim 1, characterized in that, The liquid inlet plate (3) is made of engineering plastic; The liquid inlet plate (3) is square in shape, with a thickness of 18-30mm and an area of ​​580*560-660*550mm.

9. The side plate structure for AEM water electrolysis to produce hydrogen according to claim 1, characterized in that, The inner diameter of the liquid inlet plate through hole (302) is 23-35mm, and the outer diameter is 28-40mm; The groove (301) has a depth of 3-7mm and an area of ​​420*310-500*390mm; The area of ​​the liquid inlet plate through groove (303) is 110*24-190*41mm.

10. The side plate structure for AEM water electrolysis to produce hydrogen according to claim 1, characterized in that, The area of ​​the electrode plane (401) is 419*309-499*389mm; The area of ​​the electrode wiring part (402) is 100*10-150*24mm, and the length of the electrode wiring part (402) extending from the side plate main body part (101) is 103-120mm.

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