Capillary tube liquid supply electrolytic bath module and electrolytic bath

Abstract

The invention discloses a capillary liquid supply electrolytic bath module and an electrolytic bath, and belongs to the field of water electrolysis hydrogen production. The electrolytic cell module comprises a plurality of electrolytic cell small chambers, wherein each electrolytic cell small chamber comprises an anode plate, an anode electrode, a diaphragm, a cathode electrode, a sealing gasket and a cathode plate which are sequentially stacked; water replenishing ports are formed in corresponding positions of the anode end plate, the cathode end plate, the anode plate, the cathode plate and the sealing gasket, a diaphragm mounting groove is formed in one side of the anode plate, a diaphragm is mounted in the diaphragm mounting groove, and a first flow field area is arranged in the diaphragm mounting groove; and a capillary tube through hole is further formed in the diaphragm mounting groove, and electrolyte entering from the water replenishing port enters the diaphragm through the capillary tube through hole and is self-sucked to a set height by the diaphragm. According to the invention, the uniformly distributed capillary tube through holes are adopted for feeding liquid, and the mode that the diaphragm is self-sucked to a set height is matched, so that the electrolyte consumption is low, stable and uniform liquid supply can be realized, and the continuous electrolysis process is ensured.

Description

Technical Field

[0001] The invention relates to the field of hydrogen production by electrolyzing water, and in particular to a capillary liquid supply electrolytic cell module and an electrolytic cell. Background Art

[0002] As a clean chemical energy storage method, water electrolysis to produce hydrogen can not only effectively store renewable energy, but also provide high-quality hydrogen fuel. Hydrogen can not only release electricity and heat in fuel cells, but can also be directly used in the field of transportation, making it an ideal clean secondary energy carrier. However, the equipment and operating costs of electrolysis devices are still relatively high, which is one of the main obstacles to large-scale application. Developing efficient and economical water electrolysis hydrogen production devices is one of the important ways to achieve large-scale electrolysis hydrogen production and hydrogen energy economy.

[0003] Electrolyte is needed in the process of electrolyzing water to produce hydrogen. Traditional electrolysis devices require a pump to provide the flow of electrolyte, which has a complex structure and the risk of pump failure. It also consumes a large amount of electrolyte to complete the electrolysis, which is a serious waste and leads to high operating costs. Summary of the invention

[0004] Based on the above technical problems, the present invention proposes a capillary liquid supply electrolytic cell module and an electrolytic cell.

[0005] The technical solution adopted by the present invention is:

[0006] A capillary liquid supply electrolytic cell module comprises a plurality of electrolytic cell chambers, all of which are stacked and arranged between an anode terminal plate and a cathode terminal plate;

[0007] The electrolytic cell chamber comprises an anode plate, an anode electrode, a diaphragm, a cathode electrode, a sealing gasket and a cathode plate which are stacked in sequence;

[0008] The anode end plate, cathode end plate, anode plate, cathode plate and sealing gasket are all provided with water replenishment ports at corresponding positions, a diaphragm mounting groove is provided on one side of the anode plate, the diaphragm is installed in the diaphragm mounting groove, and a first flow field area is provided in the diaphragm mounting groove;

[0009] A capillary through hole is also provided on the diaphragm installation groove, and the electrolyte entering the water supply port enters the diaphragm through the capillary through hole and is self-absorbed by the diaphragm to a set height;

[0010] A hydrogen outlet and an oxygen outlet are also provided at corresponding positions of the anode end plate, the cathode end plate, the anode plate, the cathode plate and the sealing gasket.

[0011] Preferably, the water replenishment port is in the shape of an elongated strip and is extended along one side of the anode end plate, the cathode end plate, the anode plate, the cathode plate or the sealing gasket; a plurality of capillary through holes are provided and are arranged in a row at intervals, a water flow distribution strip is provided between the capillary through holes and the water replenishment port, a distribution flow channel is formed between adjacent water flow distribution strips, and the water replenishment port is connected to the capillary through holes through the distribution flow channel.

[0012] Preferably, a second flow field area is provided on one side of the cathode plate, and the first flow field area and the second flow field area have the same structure and are arranged symmetrically; the first flow field area and the second flow field area both include a guide area and a low stress area, and a plurality of guide strips are provided in the guide area, and adjacent guide strips are arranged at intervals, and the extension direction of the guide strips is perpendicular to the extension direction of the water replenishment port; a plurality of guide protrusions are provided in the low stress area; and a connecting port is provided on the sealing gasket at positions corresponding to the first flow field area and the second flow field area.

[0013] Preferably, the width of the guide strip is 1.5-3 mm, and the spacing between adjacent guide strips is 1-5 mm; the cross-section of the guide protrusion is circular with a radius of 1-3 mm, or the cross-section of the guide protrusion is a rounded rectangle.

[0014] Preferably, oxygen gas flow distribution strips and hydrogen gas flow distribution strips are also provided on the anode end plate, cathode end plate, anode plate and cathode plate, and parallel flow channels, corrugated flow channels or arc flow channels are formed between the oxygen gas flow distribution strips, hydrogen gas flow distribution strips and water flow distribution strips;

[0015] The capillary liquid supply electrolyzer module also includes an anode end pressure plate and a cathode end pressure plate, screw holes are arranged at corresponding positions of the circumference of the anode end pressure plate and the cathode end pressure plate, screw rods pass through the screw holes and are fastened by bolts;

[0016] Carbon paper is further arranged between the anode plate and the separator, and / or between the cathode plate and the separator.

[0017] Preferably, a cooling water channel is also provided on the anode end plate, cathode end plate, anode plate and cathode plate. The extension direction of the cooling water channel is the same as the extension direction of the water supply port, and is arranged in the middle position of the anode end plate, cathode end plate, anode plate and cathode plate; one end of the cooling water channel is connected to the cooling water inlet, and the other end of the cooling water channel is connected to the cooling water outlet.

[0018] Preferably, the pore size of the diaphragm is 0.4 μm-12 μm, and the porosity of the diaphragm is 65-85%.

[0019] Preferably, the radius of the capillary through hole is calculated according to the following formula:

[0020]

[0021] Where: r is the radius of the capillary hole m, A is the empirical coefficient, with a value of 1.1-1.3, μ is the viscosity of the electrolyte Pa·s, Q is the hydrogen production Nm / h, P is the hydrogen production pressure Pa, w is the width of the water flow distribution strip m, and j is the current density A / m 2 , U is the chamber voltage V, l is the length of the water supply port m, and k is the electrolyte conductivity S / m.

[0022] Preferably, sealing rings are arranged around the water replenishment port, oxygen outlet, hydrogen outlet, cooling water inlet and cooling water outlet.

[0023] The present invention also provides a capillary liquid-feeding electrolytic cell, which is formed by connecting a plurality of the capillary liquid-feeding electrolytic cell modules as described above.

[0024] The beneficial technical effects of the present invention are:

[0025] 1. The capillary liquid supply electrolytic cell module provided by the present invention adopts uniformly distributed capillary through holes for liquid inlet, and cooperates with the diaphragm to self-absorb to a set height. The amount of electrolyte used is small, and no electrolyte circulation pump is required. The system structure is simple, the manufacturing and operating costs are reduced, and it is environmentally friendly and economical.

[0026] 2. The present invention also provides a method for determining the optimal radius of the capillary through hole. The capillary through hole designed according to this method can provide a suitable liquid inlet flow rate, and cooperate with a diaphragm with a suitable porosity to achieve stable and uniform liquid supply and ensure the continuous progress of the electrolysis process.

[0027] 3. In the electrolytic cell module or electrolytic cell provided by the present invention, the electrolyte contacts the electrode in the form of a very thin layer, and the current density is high and the efficiency is excellent.

[0028] 4. The structural design of the flow field area, distribution strips and other structures of the electrolytic cell of the present invention can guide and divide the liquid into multiple flows, improve the flow field distribution, and reduce the generation of eddies and turbulence.

[0029] 5. The electrolytic cell of the present invention has the advantages of simple structure, uniform liquid supply, low cost and high performance.

[0030] 6. The electrolytic cell of the present invention can adopt a square structure design, which is convenient for modular and standardized assembly and expands production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0032] Figure 1 This is a schematic diagram of the exploded structural principle of an embodiment of a capillary liquid supply electrolytic cell module of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of the capillary liquid supply electrolytic cell module of the present invention after being fastened and formed by a screw;

[0034] Figure 3 A schematic diagram of the structural principle of one side of the anode plate in the present invention;

[0035] Figure 4 It is a schematic diagram of the structural principle of the other side of the anode plate in the present invention;

[0036] Figure 5 It is a schematic diagram of the structural principle of one side of the cathode plate in the present invention;

[0037] Figure 6 It is a schematic diagram of the structural principle of the other side of the cathode plate in the present invention;

[0038] Figure 7 It is a schematic diagram of the structural principle of one side of the anode end plate or the cathode end plate in the present invention;

[0039] Figure 8 It is a schematic diagram of the structural principle of the other side of the anode end plate or the cathode end plate in the present invention.

[0040] In the figure: 1-anode end plate, 2-cathode end plate, 3-anode plate, 4-anode electrode, 5-diaphragm, 6-cathode electrode, 7-sealing gasket, 8-cathode plate, 9-water replenishment port, 10-diaphragm mounting groove, 11-capillary through hole, 12-hydrogen outlet, 13-oxygen outlet, 14-anode end pressure plate, 15-cathode end pressure plate, 16-screw hole, 17-screw, 18-carbon paper, 19-water flow distribution strip, 20-distribution flow channel, 21-guide strip, 22-guide protrusion, 23-connecting port, 24-oxygen airflow distribution strip, 25-hydrogen airflow distribution strip, 26-cooling water channel, 27-cooling water inlet, 28-cooling water outlet, 29-oxygen outlet channel, 30-sealing ring. DETAILED DESCRIPTION

[0041] In conjunction with the accompanying drawings, a capillary liquid supply electrolytic cell module includes a plurality of electrolytic cell chambers, all of which are stacked and arranged between the anode end plate 1 and the cathode end plate 2. The electrolytic cell chamber includes an anode plate 3, an anode electrode 4, a diaphragm 5, a cathode electrode 6, a sealing gasket 7 and a cathode plate 8 stacked in sequence. A water replenishment port 9 is provided at corresponding positions on the anode end plate 1, the cathode end plate 2, the anode plate 3, the cathode plate 8 and the sealing gasket 7, which is used to replenish the electrolyte into the electrolytic cell. A diaphragm mounting groove 10 is provided on one side of the anode plate 3, and the diaphragm 5 is installed in the diaphragm mounting groove 10. The size of the diaphragm mounting groove 10 matches the size of the diaphragm 5, and a first flow field area is provided in the diaphragm mounting groove 10. A capillary through hole 11 is also provided on the diaphragm mounting groove, and the electrolyte entering the water replenishment port 9 enters the diaphragm 5 through the capillary through hole 11 and is self-absorbed by the diaphragm 5 to a set height. A hydrogen outlet 12 for discharging hydrogen generated by electrolysis and an oxygen outlet 13 for discharging oxygen generated by electrolysis are also provided at corresponding positions of the anode end plate 1, the cathode end plate 2, the anode plate 3, the cathode plate 8 and the sealing gasket 7.

[0042] The present invention utilizes capillary action to achieve spontaneous flow of electrolyte from the reservoir between electrodes to perform electrolysis reaction. Specifically, uniformly distributed capillary through holes are used to feed liquid, and the diaphragm is self-absorbed to a set height for use in electrolysis reaction. This electrolyte supply method and electrolysis method use less electrolyte and do not require an electrolyte circulation pump. Moreover, the electrolyte contacts the electrodes in the form of a very thin layer, with high current density and excellent efficiency. The present invention can simplify the device, reduce equipment and operating costs, and realize a safe, stable, and continuous electrolysis process. It is of great significance to promote the development of hydrogen energy and water electrolysis hydrogen production technology.

[0043] Furthermore, a plurality of electrolytic cell chambers may be stacked between the anode terminal plate 1 and the cathode terminal plate 2. An anode terminal pressure plate 14 is disposed on the outside of the anode terminal plate 1, and a cathode terminal pressure plate 15 is disposed on the outside of the cathode terminal plate. Screw holes 16 are disposed at corresponding positions of the circumferences of the anode terminal pressure plate and the cathode terminal pressure plate. Screw rods 17 pass through the screw holes 16 and are fastened by bolts. Carbon paper 18 is also disposed between the anode plate 3 and the diaphragm 5, and / or between the cathode plate 8 and the diaphragm 5.

[0044] like Figure 1 As shown in the figure, two electrolytic cell chambers are stacked between the anode terminal plate 1 and the cathode terminal plate 2. The capillary liquid supply electrolytic cell module in this embodiment includes, from left to right, an anode terminal plate, an anode plate, an anode electrode, a diaphragm, carbon paper, a cathode electrode, a sealing gasket, a cathode plate, an anode plate, an anode electrode, a diaphragm, carbon paper, a cathode electrode, a sealing gasket, a cathode plate, a cathode terminal plate, and a cathode terminal plate, which are stacked in sequence and then fastened into shape by screws and bolts. The state after molding is as shown in FIG. Figure 2 shown.

[0045] Circular inlets and outlets are provided on the anode end pressure plate 14 and the cathode end pressure plate 15 at positions corresponding to the water supply port 9, the hydrogen outlet 12 and the oxygen outlet 13, which can also be seen from Figure 1 , Figure 2 The side of the middle cathode extreme pressure plate is clearly visible.

[0046] Furthermore, the water inlet 9 is in the shape of a long strip and is arranged along one side of the anode end plate, cathode end plate, anode plate, cathode plate or sealing gasket, that is, the water inlet is arranged on the anode end plate, cathode end plate, anode plate, cathode plate and sealing gasket. Figure 3 , Figure 4 As shown, the capillary through hole 11 is provided in plurality and arranged in a row at intervals, a water flow distribution strip 19 is provided between the capillary through hole and the water replenishment port, a distribution channel 20 is formed between adjacent water flow distribution strips 19, and the water replenishment port is connected with the capillary through hole 11 through the distribution channel 20. The water flow distribution strip 19 is provided on the outside of the anode plate, that is, in the direction toward the anode end plate.

[0047] Furthermore, a second flow field area is provided on one side of the cathode plate, and the size and structural form of the first flow field area and the second flow field area are the same, and are arranged symmetrically. The first flow field area and the second flow field area both include a guide area and a low stress area, and a plurality of guide bars 21 are provided in the guide area, and adjacent guide bars are arranged at intervals, and the extension direction of the guide bars 21 is perpendicular to the extension direction of the water replenishment port 9. A plurality of guide protrusions 22 are provided in the low stress area. A connecting port 23 is provided on the sealing gasket 7 and at positions corresponding to the first flow field area and the second flow field area. The flow field area adopts the form of combining the guide bar 21 with the guide protrusion 22, which can improve the uniformity of liquid distribution and reduce eddy currents. Specifically, the flow field area is provided with a plurality of guide bars 21, which can guide and divide the liquid into multiple flows. Guide protrusions 22 are also provided near the hydrogen outlet 12 and the oxygen outlet 13. These guide protrusions are located in the low stress area, which can improve the flow field distribution in these areas and inhibit the formation of dead water areas.

[0048] In the present invention, the flow field area of ​​the cathode plate is the same size as the flow field area of ​​the anode plate and adopts the same structural form, including the arrangement of guide strips and guide protrusions, so as to achieve good liquid flow field distribution and improve electrolysis efficiency.

[0049] The structural designs of the flow field area, distribution strips and the like of the electrolytic cell of the present invention can guide and divide the liquid into multiple flows, improve the flow field distribution, and reduce the generation of eddies and turbulence.

[0050] The width of the guide strip 21 is set to 1.5-3mm, and the spacing between adjacent guide strips is set to 1-5mm; the cross-sectional shape of the guide protrusion 22 is circular, and the radius is 1-3mm. Of course, the cross-sectional shape of the guide protrusion can also be set to a rounded rectangle or square.

[0051] Oxygen gas flow distribution strips 24 and hydrogen gas flow distribution strips 25 are also provided on the anode end plate 1, the cathode end plate 2, the anode plate 3 and the cathode plate 8, and parallel flow channels, corrugated flow channels or arc flow channels are formed between adjacent oxygen gas flow distribution strips 24, between hydrogen gas flow distribution strips 25 and between adjacent water flow distribution strips 19. That is to say, the oxygen gas flow distribution strips 24, the hydrogen gas flow distribution strips 25 and the water flow distribution strips 19 can be set to be straight, corrugated or arc-shaped. The above-mentioned oxygen gas flow distribution strips 24, hydrogen gas flow distribution strips 25 and water flow distribution strips 19 are all on the same side of the anode end plate 1, the cathode end plate 2, the anode plate 3 and the cathode plate 8, which are collectively referred to as distribution areas, that is, the distribution area is set on the anode end plate 1 and faces the side of the anode plate 3, and the distribution area is set on the anode plate 3 and faces the side of the anode end plate 1. Similarly, the distribution area is set on the cathode end plate 2 and faces the side of the cathode plate 8, and the distribution area is set on the cathode plate 8 and faces the side of the anode end plate 2. In addition, as Figure 1 As shown, when two electrolytic cell chambers are stacked between the anode end plate 1 and the cathode end plate 2, distribution areas are also provided on the opposite sides of the anode plate and the cathode plate at the middle position. Of course, the flow field area as described above is provided on the other side of the anode plate and the cathode plate.

[0052] That is, the side of the anode end plate close to the anode plate is provided with the same distribution area, gas outlet channel and other structures as the side of the anode plate. The side of the cathode end plate close to the cathode plate is provided with the same distribution area, gas outlet channel and other structures as the side of the cathode plate.

[0053] The sealing gasket 7 of the electrolytic cell of the present invention is slotted according to the size of the diaphragm 5 so that the slotted area on the sealing gasket, namely the communication port 23, matches the inner cavity contour of the diaphragm mounting groove 10.

[0054] An oxygen outlet channel 29 is also provided in the diaphragm installation groove 10 near the oxygen outlet 13 for outputting oxygen. A hydrogen outlet channel is also provided in the flow field area near the hydrogen outlet for outputting hydrogen generated by electrolysis. The electrolyte enters the diaphragm 5, the cathode electrode, the anode electrode, etc. through the capillary through hole 11, participates in the subsequent electrolysis reaction, and generates hydrogen.

[0055] In the present invention, the cathode electrode is prepared by a method of spraying a catalyst on a nickel mesh or electro-depositing a catalyst on a nickel mesh. The catalyst is preferably a nickel-iron catalyst. The anode catalyst is prepared by a method of spraying a catalyst on carbon paper. The catalyst is preferably a Pt / C catalyst.

[0056] As a further design of the present invention, a cooling water channel 26 is also provided on the anode end plate 1, the cathode end plate 2, the anode plate 3 and the cathode plate 8. The extension direction of the cooling water channel 26 is the same as the extension direction of the water supply port 9, and is arranged at the middle position of the anode end plate 1, the cathode end plate 2, the anode plate 3 and the cathode plate 8. The cooling water channel 26 and the distribution area are both on the same side of the anode end plate 1, the cathode end plate 2, the anode plate 3 and the cathode plate 8. One end of the cooling water channel 26 is connected to the cooling water inlet 27, and the other end of the cooling water channel is connected to the cooling water outlet 28. The cooling water inlet 27 is used to introduce cooling water into the cooling water channel 26. The cooling water outlet 28 is used for cooling water to flow out of the cooling water channel 26. The cooling water channel 26 can take away the excess heat generated during the electrolysis process, prevent the internal temperature of the electrolytic cell from being too high, ensure that the electrolysis process is carried out within a suitable temperature range, and improve the electrolysis efficiency. In addition, it can also play a certain supporting role.

[0057] Furthermore, the pore size of the above-mentioned diaphragm 5 is set at 0.4μm-12μm, ensuring water absorption performance while self-absorbing the electrolyte to a suitable height. The empty porosity of the diaphragm 5 is 65-85%, ensuring mechanical properties while being able to effectively supply liquid. The diaphragm 5 can be made of polyethersulfone diaphragm, etc.

[0058] The radius of the capillary through hole 11 is calculated according to the following formula:

[0059]

[0060] Where: r is the radius of the capillary hole m, A is the empirical coefficient, with a value of 1.1-1.3, μ is the viscosity of the electrolyte Pa·s, Q is the hydrogen production Nm / h, P is the hydrogen production pressure Pa, w is the width of the water flow distribution strip m, and j is the current density A / m 2 , U is the chamber voltage V, l is the length of the water supply port m, and k is the electrolyte conductivity S / m.

[0061] The present invention further provides a method for determining the optimal radius of the capillary through hole. The capillary through hole designed according to this method can provide a suitable liquid inlet flow rate, cooperate with a diaphragm with a suitable porosity, realize stable and uniform liquid supply, and ensure the continuous progress of the electrolysis process.

[0062] The water replenishment port 9, oxygen outlet 13, hydrogen outlet 12, cooling water inlet 27 and cooling water outlet 28 are surrounded by sealing rings 30 to seal the interfaces to ensure the air tightness and leak-proofness of each interface.

[0063] The present invention also provides a capillary liquid supply electrolytic cell, which is formed by connecting a plurality of capillary liquid supply electrolytic cell modules as described above. The electrolytic cell of the present invention has the advantages of simple structure, uniform liquid supply, low cost, high performance, etc. The electrolytic cell of the present invention can be designed in a square structure, which is convenient for modular and standardized assembly and expands production capacity.

[0064] The parts not mentioned in the above methods can be realized by adopting or drawing on existing technologies.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A capillary liquid supply electrolytic cell module, characterized in that: It comprises a plurality of electrolytic cell chambers, all of which are stacked and arranged between an anode terminal plate and a cathode terminal plate; The electrolytic cell chamber comprises an anode plate, an anode electrode, a diaphragm, a cathode electrode, a sealing gasket and a cathode plate which are stacked in sequence; The anode end plate, cathode end plate, anode plate, cathode plate and sealing gasket are all provided with water replenishment ports at corresponding positions, a diaphragm mounting groove is provided on one side of the anode plate, the diaphragm is installed in the diaphragm mounting groove, and a first flow field area is provided in the diaphragm mounting groove; A capillary through hole is also provided on the diaphragm installation groove, and the electrolyte entering the water supply port enters the diaphragm through the capillary through hole and is self-absorbed by the diaphragm to a set height; A hydrogen outlet and an oxygen outlet are also provided at corresponding positions of the anode end plate, the cathode end plate, the anode plate, the cathode plate and the sealing gasket.

2. A capillary liquid supply electrolytic cell module according to claim 1, characterized in that: The water replenishment port is in the shape of an elongated strip and is extended along one side of the anode end plate, the cathode end plate, the anode plate, the cathode plate or the sealing pad; a plurality of capillary through holes are provided and are arranged in a row at intervals, a water flow distribution strip is provided between the capillary through holes and the water replenishment port, a distribution flow channel is formed between adjacent water flow distribution strips, and the water replenishment port is connected with the capillary through holes through the distribution flow channel.

3. A capillary liquid supply electrolytic cell module according to claim 1 or 2, characterized in that: A second flow field area is arranged on one side of the cathode plate, and the structures of the first flow field area and the second flow field area are the same and are arranged symmetrically; the first flow field area and the second flow field area both include a guide area and a low stress area, and a plurality of guide strips are arranged in the guide area, and adjacent guide strips are arranged at intervals, and the extension direction of the guide strips is perpendicular to the extension direction of the water replenishment port; a plurality of guide protrusions are arranged in the low stress area; and a connecting port is arranged on the sealing gasket at the position corresponding to the first flow field area and the second flow field area.

4. A capillary liquid supply electrolytic cell module according to claim 3, characterized in that: The width of the guide strip is 1.5-3 mm, and the spacing between adjacent guide strips is 1-5 mm; the cross section of the guide protrusion is circular with a radius of 1-3 mm, or the cross section of the guide protrusion is a rounded rectangle.

5. The capillary liquid supply electrolytic cell module according to claim 2, characterized in that: Oxygen gas flow distribution strips and hydrogen gas flow distribution strips are also arranged on the anode end plate, cathode end plate, anode plate and cathode plate, and parallel flow channels, corrugated flow channels or arc flow channels are formed between the oxygen gas flow distribution strips, hydrogen gas flow distribution strips and water flow distribution strips; The capillary liquid supply electrolyzer module also includes an anode end pressure plate and a cathode end pressure plate, screw holes are arranged at corresponding positions of the circumference of the anode end pressure plate and the cathode end pressure plate, screw rods pass through the screw holes and are fastened by bolts; Carbon paper is further arranged between the anode plate and the separator, and / or between the cathode plate and the separator.

6. The capillary liquid supply electrolytic cell module according to claim 1, characterized in that: The anode end plate, cathode end plate, anode plate and cathode plate are also provided with cooling water channels, the extension direction of the cooling water channels is the same as the extension direction of the water supply port, and are arranged in the middle position of the anode end plate, cathode end plate, anode plate and cathode plate; one end of the cooling water channel is connected to the cooling water inlet, and the other end of the cooling water channel is connected to the cooling water outlet.

7. The capillary liquid supply electrolytic cell module according to claim 1, characterized in that: The pore size of the diaphragm is 0.4 μm-12 μm, and the porosity of the diaphragm is 65-85%.

8. A capillary liquid supply electrolytic cell module according to claim 2, characterized in that: The radius of the capillary through hole is calculated according to the following formula: Where: r is the radius of the capillary hole m, A is the empirical coefficient, with a value of 1.1-1.3, μ is the viscosity of the electrolyte Pa·s, Q is the hydrogen production Nm / h, P is the hydrogen production pressure Pa, w is the width of the water flow distribution strip m, and j is the current density A / m 2 , U is the chamber voltage V, l is the length of the water supply port m, and k is the electrolyte conductivity S / m.

9. A capillary liquid supply electrolytic cell module according to claim 6, characterized in that: Sealing rings are arranged around the water replenishment port, the oxygen outlet, the hydrogen outlet, the cooling water inlet and the cooling water outlet.

10. A capillary liquid supply electrolytic cell, characterized in that: It is formed by connecting a plurality of capillary liquid supply electrolytic cell modules as described in any one of claims 1 to 9.

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