Polar plate suitable for electrolytic bath, electrolytic unit and electrolytic bath

Abstract

The invention provides a polar plate suitable for an electrolytic bath, an electrolysis unit and the electrolytic bath. The annular boss surrounds the groove and is used for being combined with the edge of a diaphragm of the electrolytic bath in a sealed mode, and a cavity used for electrolyzing electrolyte is formed by the diaphragm and the groove; the liquid inlet hole is formed in the boss; the air outlet hole is formed in the side, opposite to the liquid inlet hole in the radial direction, of the boss; each through hole is formed to communicate the liquid inlet hole or the air outlet hole with the groove, so that the electrolyte is allowed to enter the cavity from the liquid inlet hole or gas formed after electrolysis is allowed to flow out of the cavity to the air outlet hole; the machining groove is formed in the position, abutting against the side wall of the boss, of the bottom of the groove, and each through hole extends to the machining groove.

Description

Technical Field

[0001] At least one embodiment of the present disclosure relates to the field of electrolysis technology, and more particularly to a pole plate, an electrolysis unit, and an electrolysis cell suitable for an electrolysis cell. Background Art

[0002] An electrolyzer is a device used to electrolyze water Producing hydrogen and oxygen During electrolysis, direct current is passed through two electrodes (anode and cathode) to split water molecules. The cathode produces hydrogen, while the anode produces oxygen.

[0003] The sealing performance of an electrolyzer is crucial to its operation. If the seal is not tight, hydrogen and oxygen will leak out, which not only poses a safety risk but also leads to reduced production efficiency and product quality, exacerbated electrode corrosion and equipment damage. In the relevant technology, the sealing performance is still insufficient. Summary of the Invention

[0004] In view of this, the present disclosure provides an electrode plate, an electrolysis unit and an electrolysis cell suitable for an electrolytic cell, which are used to at least partially solve the above technical problems and can improve the sealing performance of the electrolytic cell.

[0005] According to a first aspect of the present disclosure, there is provided a plate suitable for an electrolytic cell, comprising: a groove; an annular boss surrounding the groove, the boss being used to seal and combine with the edge of the diaphragm of the electrolytic cell, so that the diaphragm and the groove form a chamber for electrolyzing an electrolyte; a liquid inlet formed on the boss; an air outlet formed on a side of the boss radially opposite to the liquid inlet; a plurality of through holes, each of the through holes being formed to connect the liquid inlet or the air outlet with the groove to allow the electrolyte to enter the chamber from the liquid inlet or allow the gas formed after electrolysis to flow out of the chamber to the air outlet; and a processing groove formed at the bottom of the groove where it abuts against the side wall of the boss, each of the through holes extending to the processing groove.

[0006] Optionally, the processing groove includes a plurality of spaced-apart cutouts, and one of the cutouts extends to one of the through holes.

[0007] Optionally, the processing groove includes a plurality of give-way grooves, each of the give-way grooves is close to the liquid inlet or the air outlet, and a plurality of the through holes extend to one of the give-way grooves.

[0008] Optionally, the boss includes a first boss and a second boss that are oppositely arranged, and the groove includes a first groove surrounded by the first boss and a second groove surrounded by the second boss.

[0009] Optionally, two adjacent diaphragms form a first chamber with the first groove and a second chamber with the second groove based on sealing combination with the first boss and the second boss respectively.

[0010] Optionally, the first boss is directly sealed and combined with the diaphragm, and the second boss is sealed and combined with another diaphragm via an insulating gasket.

[0011] Optionally, the electrode plate further comprises: a plurality of positioning holes formed on the boss, and the through hole connects the positioning holes with the groove.

[0012] Optionally, the liquid inlet hole includes: a first liquid inlet hole, the first liquid inlet hole is connected to the first groove, and the first liquid inlet hole is configured to form a first liquid inlet channel with the first liquid inlet hole of the adjacent electrode plate; a second liquid inlet hole, the second liquid inlet hole is connected to the second groove, and the second liquid inlet hole is configured to form a second liquid inlet channel with the second liquid inlet hole of the adjacent electrode plate.

[0013] Optionally, the air outlet includes: a first air outlet, formed on a side of the boss radially opposite to the first liquid inlet, the first air outlet is connected to the first groove, and the first air outlet is configured to form a first air outlet channel with the first air outlet of the adjacent electrode plate; a second air outlet, formed on a side of the boss radially opposite to the second liquid inlet, the second air outlet is connected to the second groove, and the second air outlet is configured to form a second air outlet channel with the second air outlet of the adjacent electrode plate.

[0014] Optionally, the first groove is deeper than the second groove; wherein, after electrolysis, oxygen is formed by the first chamber and hydrogen is formed by the second chamber.

[0015] In a second aspect of the present disclosure, an electrolysis unit is provided, comprising: at least two electrode plates; a diaphragm disposed between the two electrode plates to form a first chamber and a second chamber with the two electrode plates, respectively; a cathode layer located in the first chamber or the second chamber so that the electrolyte reacts to release hydrogen; and an anode layer located in the second chamber or the first chamber on a side of the diaphragm opposite to the cathode layer so that the electrolyte reacts to release oxygen.

[0016] According to a third aspect of the present disclosure, an electrolytic cell is provided, comprising: a plurality of electrolytic units as described above, wherein the plurality of electrolytic units are stacked in sequence to form a stacking structure; two end plates, respectively located at the two ends of the plurality of stacking structures; and a mounting assembly, suitable for fixing the stacking structure to the two end plates.

[0017] According to the disclosed embodiments, by providing a machining groove at the bottom of the groove near the sidewall of the boss, a machining space is provided for machining the through hole, thereby enabling the through hole to be machined without damaging the surface of the boss. Furthermore, because the through hole can be machined with a small height difference between the boss and the groove, the through hole can be connected to ensure sufficient flow of electrolyte or gas while maintaining a relatively thin base plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0019] Figure 1 A three-dimensional schematic diagram of an electrolytic cell according to an embodiment of the present disclosure is schematically shown.

[0020] Figure 2 An exploded view of an electrolysis unit of an electrolysis cell according to an embodiment of the present disclosure is schematically shown.

[0021] Figure 3 The figure schematically shows an exploded view of a support portion and a plate according to an embodiment of the present disclosure.

[0022] Figure 4 A perspective view of a plate according to another embodiment of the present disclosure is schematically shown.

[0023] Figure 5 A cross-sectional view of an electrolysis cell according to an embodiment of the present disclosure is schematically shown.

[0024] Figure 6 Schematically shows Figure 5 Exploded view of FIG. 1 , in which the support portion is not shown.

[0025] Figure 7 A cross-sectional view of an electrolysis cell according to another embodiment of the present disclosure is schematically shown.

[0026] Figure 8 Schematically shows Figure 7 Exploded view of FIG. 1 , in which the support portion is not shown.

[0027] Figure 9 A side view schematically illustrates the front side of a plate according to an embodiment of the present disclosure.

[0028] Figure 10 Schematically shows Figure 9 A side view of the back side of the plate is shown.

[0029] Figure 11 Schematically shows Figure 9 A partial enlarged view of .

[0030] Figure 12 Schematically shows Figure 10 A partial enlarged view of .

[0031] Figure 13 A partial view of a mesh support portion according to an embodiment of the present disclosure is schematically shown.

[0032] Figure 14 A partial diagram of a grid cell according to an embodiment of the present disclosure is schematically shown.

[0033] Figure 15 A partial side view of a mesh support portion according to an embodiment of the present disclosure is schematically shown.

[0034] Figure 16 A partial view of a mesh support portion according to another embodiment of the present disclosure is schematically shown.

[0035] Figure 17 A partial diagram of a grid cell according to another embodiment of the present disclosure is schematically shown.

[0036] Figure 18 A partial side view of a mesh support portion according to another embodiment of the present disclosure is schematically shown.

[0037] Reference numerals

[0038] 1. Electrolytic cell; 11. Diaphragm; 12. First support assembly; 13. Second support assembly; 14. Plate; 14a. First plate; 14b. Second plate; 141. Boss; 1411. First waterline; 1412. Second waterline; 1413. First boss; 1414. Second boss; 1415. Third waterline; 142. Groove; 1421. First groove; 1422. Second groove; 143. Liquid inlet; 1431. First liquid inlet; 1432. Second liquid inlet; 1433. Main liquid inlet; 1434. Sub-liquid inlet; 144. Air outlet; 1441. First air outlet; 1442. Second air outlet; 145. Through hole; 146. Positioning hole; 147. 7. Waistline; 148. Processing groove; 1481. Incision; 1482. Makeway groove; 15. Support part; 151. First surface; 152. Second surface; 153. Plate-shaped support part; 1531. First flow channel; 154. Mesh-shaped support part; 1541. Second flow channel; 1542. Grid monomer; 1543. Connecting rod; 1544. First contact surface; 1545. Second contact surface; 16. Cathode layer; 17. Anode layer; 18. Nickel foam layer; 19. Insulating gasket; 191. First chamber; 192. Second chamber; 193. Makeway hole; 2. End plate; 3. Mounting assembly; 4. First liquid inlet channel; 5. Second liquid inlet channel; 6. First air outlet channel; 7. Second air outlet channel. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0040] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise," "include," etc. used herein indicate the presence of features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0041] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0042] It should also be noted that directional terms such as "upper," "lower," "front," "back," "left," and "right" mentioned in the embodiments are merely references to the directions in the accompanying drawings and are not intended to limit the scope of protection of this disclosure. Throughout the drawings, identical elements are represented by identical or similar reference numerals. Conventional structures or configurations will be omitted where they may cause confusion in understanding this disclosure.

[0043] Figure 1 A three-dimensional schematic diagram of an electrolytic cell according to an embodiment of the present disclosure is schematically shown.

[0044] The embodiment of the present disclosure provides an electrolyzer. The electrolyzer can be used to electrolyze water to produce hydrogen. Figure 1 As shown, the electrolytic cell may include multiple electrolytic cells 1, two end plates 2, and a mounting assembly 3. Multiple electrolytic cells 1 may be stacked in sequence to form a stacked structure. The two end plates 2 may be located at either end of the stacked structure. The mounting assembly 3 may be used to secure the stacked structure to the two end plates 2.

[0045] Figure 2 An exploded view of an electrolysis unit of an electrolysis cell according to an embodiment of the present disclosure is schematically shown. Figure 3 The figure schematically shows an exploded view of a support portion and a plate according to an embodiment of the present disclosure.

[0046] The embodiment of the present disclosure provides an electrolysis unit 1 of an electrolytic cell. Figure 2-Figure 3As shown, the electrolysis cell 1 may include a diaphragm 11, two sets of support assemblies (a first support assembly 12 and a second support assembly 13), an insulating gasket 19, a cathode layer 16, and an anode layer 17. The diaphragm 11 may be sealed and bonded between the two sets of support assemblies via the insulating gasket 19, thereby forming two chambers suitable for containing an electrolyte. The cathode layer 16 may be located in one of the two chambers, allowing the electrolyte to react and release hydrogen. The anode layer 17 may be located in the other of the two chambers, allowing the electrolyte to react and release oxygen.

[0047] It should be noted that during the hydrogen production process using water electrolysis, the diaphragm 11 allows ions to pass through but blocks electrons. For example, in anion exchange membrane electrolysis, the ions are typically hydroxide ions. In proton exchange membrane electrolysis, the ions are typically hydrogen ions. This allows ions to migrate from the anode to the cathode under the action of an electric field, completing the circuit while maintaining charge balance between the two electrodes. In this embodiment, the electrolysis unit 1 can be an anion electrolysis unit for hydrogen production using water electrolysis, and the diaphragm 11 can be an anion exchange membrane (AEM). The electrolyte can be water or an alkaline aqueous solution. The cathode layer 16 and the anode layer 17 can be made of corrosion-resistant metal materials to provide both mechanical strength and electrical conductivity. Materials such as platinum (Pt), palladium (Pd), nickel (Ni), or cobalt (Co) can be used as catalyst materials for the cathode layer 16. Oxides of iridium (Ir) and ruthenium (Ru), as well as oxides of cobalt (Co) and manganese (Mn), can be used as catalyst materials for the anode layer 17. It is understandable that, where theory and practice permit, the electrolysis unit 1 can also be applied to producing hydrogen by alkaline water electrolysis.

[0048] In detail, the two groups of support components may include first support components 12 ( Figure 2 the lower side of the middle diaphragm 11) and the second support assembly 13 ( Figure 2 The diaphragm 11 is clamped between the first support assembly 12 and the second support assembly 13 using an insulating gasket 19. The diaphragm 11 is sealed and combined with the first support assembly 12 and the second support assembly 13 to form two chambers for containing the electrolyte, with the cathode layer 16 and the anode layer 17 located in each chamber. Under the action of direct current, the electrolyte dissociates into hydrogen and oxygen.

[0049] In an exemplary embodiment, Figure 2-Figure 3 As shown, each support assembly may include a plate 14 and a support portion 15. Specifically, the plate 14 may be formed into a plate-like structure. The plate 14 may be in the shape of a circular plate, a rectangular plate, or a polygonal plate, etc., which may be specifically defined according to actual needs. Each plate 14 may include an annular boss 141, a groove 142, a liquid inlet 143, an air outlet 144, and a plurality of through holes 145. Figure 2-Figure 3As shown, the boss 141 can surround the groove 142. It is understood that the boss 141 can also be set to a rectangular or polygonal shape, depending on actual needs. For convenience, the following description uses the case where the electrode plate 14 is circular and has an annular boss 141 and a circular groove 142 as an example.

[0050] In an exemplary embodiment, Figure 2-Figure 3 As shown, the liquid inlet hole 143 can be formed on the boss 141. The gas outlet hole 144 can be formed on the side of the boss 141 radially opposite to the liquid inlet hole 143. The liquid inlet hole 143 can allow the electrolyte to enter the chamber. The gas outlet hole 144 can allow hydrogen and oxygen to exit the chamber. The liquid inlet hole 143 is formed on the boss 141 (located at Figure 3 The liquid inlet 143 can be connected to the groove 142 to allow the electrolyte to enter the chamber. The air outlet 144 is formed on the boss 141 (located at Figure 3 To the right of the middle boss 141), the gas outlet hole 144 can communicate with the groove 142, allowing hydrogen or oxygen to escape. Furthermore, a through hole 145 can extend from the liquid inlet hole 143 through the boss 141 to the groove 142, connecting the liquid inlet hole 143 with the groove 142, thereby allowing electrolyte to enter the chamber through the liquid inlet hole 143. The through hole 145 can also extend from the gas outlet hole 144 through the boss 141 to the groove 142, connecting the gas outlet hole 144 with the groove 142, thereby allowing gas formed after electrolysis to flow out of the chamber to the gas outlet hole 144.

[0051] In the process of realizing the present disclosure, the inventors found that since the thickness of the electrode plate 14 is required to be within a certain range to ensure the appropriate volume of the entire electrolytic cell, the height difference between the boss 141 and the groove 142 is small, which is not enough to directly process the boss 141. Figure 3 Through hole 145 as shown. Conventionally, to produce through hole 145 of a predetermined size, boss 141 was cut. After processing through hole 145, the cut portion was sealed using a pressing sheet made of a material such as rubber. However, because cutting damages the upper surface of boss 141 (i.e., the upper surface of boss 141 becomes discontinuous), the pressing sheet is easily deformed during use of the integrated electrolytic cell or the electrolytic cell, thereby reducing the sealing performance of the electrolytic cell. Therefore, the present disclosure provides a plate that can improve sealing performance.

[0052] Figure 4 A perspective view of a plate according to another embodiment of the present disclosure is schematically shown.

[0053] like Figure 4As shown, in an exemplary embodiment, a recessed processing groove 148 can be formed at the bottom of the groove 142 near the side wall of the boss 141. Each through hole 145 can extend to the processing groove 148. By providing the processing groove 148, a processing space is provided for processing the through hole 145, so that the through hole 145 can be processed without damaging the surface of the boss 141. In addition, since the through hole 145 can be processed even when the height difference between the boss 141 and the groove 142 is small, the bottom plate can be kept thin while ensuring that the through hole 145 has the connectivity to guide the sufficient flow of electrolyte or gas.

[0054] In an exemplary embodiment, Figure 3 As shown, the processing groove 148 may include a plurality of spaced-apart cutouts 1481. In cases where the height difference between the groove 142 and the boss 141 is small and the through-hole 145 of a predetermined size cannot be fully exposed, a hole can be punched from the bottom of the groove 142 near the inner sidewall of the boss 141 toward the inner sidewall of the boss 141, thereby forming a through-hole 145 extending radially outward on the boss 141. In other words, the cutouts 1481 and the through-hole 145 can be formed together during the punching process, and the cutouts 1481 and the through-hole 145 can be integral. That is, by forming the cutouts 1481 in the groove 142, processing space for the through-hole 145 is provided, thereby allowing the through-hole 145 to be machined without changing the thickness of the bottom plate of the groove 142. This ensures a thinner bottom plate, thereby reducing the volume of the electrolytic cell 1, and also ensures that the through-hole 145 has the connectivity to guide the sufficient flow of electrolyte or gas. Furthermore, a hole can be drilled from the outer wall of boss 141 (i.e., the side of electrode 14) toward the inner wall of boss 141, as long as the bottom of groove 142 does not block through-hole 145, allowing the electrolyte or gas to flow in and out smoothly. The phrase "the bottom of groove 142 does not block through-hole 145" can be understood as meaning that the bottom surface of machined groove 148 is no higher than the lower surface of through-hole 145, thereby fully exposing through-hole 145.

[0055] In an exemplary embodiment, Figure 3 and Figure 4As shown, the processing groove 148 may include multiple clearance grooves 1482. Each clearance groove 1482 may be close to the liquid inlet 143 or the gas outlet 144. Multiple through holes 145 may extend to a clearance groove 1482. Furthermore, the clearance groove 1482 may be processed before punching, that is, the clearance groove 1482 is processed first and then the holes are punched. The clearance groove 1482 may also be processed after punching. By providing the clearance groove 1482, when the height difference between the groove 142 and the boss 141 is small and the through hole 145 cannot be processed by forming the cutout 1481 in the groove 142, space is provided for processing the through hole 145. In this way, the through hole 145 can still be fully exposed without changing the thickness of the bottom plate of the groove 142. This ensures that the bottom plate has a thinner thickness, thereby reducing the volume of the electrolytic unit 1, and also ensures that the through hole 145 has the connectivity to guide the electrolyte or gas to flow fully.

[0056] In an exemplary embodiment, Figure 2-Figure 4 As shown, each electrode plate 14 may be provided with a plurality of waistlines 147. Each waistline 147 may be formed on the boss 141 and surround the liquid inlet 143 and the gas outlet 144. The waistline 147 may be formed between the through hole 145 and the upper surface of the boss 141, that is, the waistline 147 may be formed as an annular closed loop that is recessed from the surface of the boss 141 but does not axially pass through the electrode plate 14. In addition, as shown in FIG. Figure 4 As shown, the waistline 147 also does not pass through the through hole 145 in the axial direction.

[0057] Figure 5 A cross-sectional view of an electrolysis cell according to an embodiment of the present disclosure is schematically shown. Figure 6 Schematically shows Figure 5 Exploded view of FIG. 1 , in which the support portion is not shown.

[0058] Furthermore, if Figure 2-Figure 6 As shown, the plate 14 (as Figure 5 The first electrode plate 14a) can be connected to the other electrode plate 14 (such as Figure 5 The insulating gasket 19 is elastic and deformable, allowing it to fit tightly against the boss 141 by applying pressure. The portion of the insulating gasket 19 covering the waistline 147 can be squeezed into the waistline 147, thereby sealing the periphery of the liquid inlet 143 and the gas outlet 144 in a closed area, thereby preventing the electrolyte and / or gas from escaping the closed area. The closed area can be represented as the area of ​​the boss 141 enclosed by the multiple waistlines 147.

[0059] According to the embodiment of the present disclosure, by setting a plurality of waistlines 147, during the process of integrating the electrolytic cell, the portion of the insulating gasket 19 covering the waistline 147 can be squeezed into the waistline 147 based on the elasticity of the insulating gasket 19, thereby sealing the periphery of the liquid inlet 143 and the gas outlet 144 in a closed area respectively to prevent the electrolyte and / or gas from flowing out of the closed area, thereby effectively avoiding the mixing of hydrogen and oxygen.

[0060] Furthermore, the insulating gasket 19 can be made of elastic materials such as rubber or silicone. Figure 2-Figure 4 As shown, the insulating gasket 19 can be an annular structure. The annular width of the insulating gasket 19 can be the same as the annular width of the boss 141. The edge of the diaphragm 11 can be clamped between the annular boss 141 of the electrode plate 14 and the insulating gasket 19. Because the insulating gasket 19 is elastic and can undergo slight deformation, it can be squeezed into the tiny gap between the electrode plate 14 and the diaphragm 11, further improving the sealing of the two chambers and effectively isolating the electrolyte in the chamber from the external environment.

[0061] Furthermore, during the electrolysis reaction, the temperature of the electrolysis unit 1 will continue to rise, and hydrogen and oxygen in the chamber will continue to be produced and discharged. Due to the influence of environmental factors such as temperature and external pressure, the insulating gasket 19 is prone to deformation. By setting the insulating gasket 19 to be made of an elastic material such as rubber or silicone, the insulating gasket 19 can be made elastic, thereby "resisting" the influence of environmental factors. In the event that the insulating gasket 19 is deformed due to environmental factors, the insulating gasket 19 can rebound, thereby reducing the impact of the environmental factors and maintaining the spatial stability of the two chambers.

[0062] In an exemplary embodiment, a plurality of closed first waterlines 1411 can be formed on the surface of the boss 141 near the groove 142 (i.e., the inner edge of the surface of the boss 141), surrounding the groove 142. Each first waterline 1411 can be recessed downward from the surface of the boss 141. The edge of the diaphragm 11 of the electrolytic cell can be directly sealed with the plurality of first waterlines 1411, thereby forming a chamber for electrolyzing the electrolyte with the groove 142. By providing the processing groove 148, the upper surface of the boss 141 is not damaged. Since a pressing plate is not provided, the first waterlines 1411 are not deformed during the processing due to deformation of the pressing plate. As a result, completely closed first waterlines 1411 can be processed, and the cutting force caused by the discontinuity of the first waterlines 1411 is not generated on the diaphragm 11, thereby preventing the diaphragm 11 from rupturing.

[0063] According to the disclosed embodiment, by configuring the first waterline 1411 as closed, when the diaphragm 11 is directly sealed against the first waterline 1411, the plate 14 used to compress the diaphragm 11 does not generate a cutting force on the diaphragm 11 due to the discontinuity of the first waterline 1411. This prevents diaphragm 11 from rupturing, thereby reducing the failure rate and maintenance costs of the electrolyzer. Here, the term "closed" means that each first waterline 1411 forms an independent, closed loop. This also applies to the second waterline 1412 and third waterline 1415 described below.

[0064] Figure 7 A cross-sectional view of an electrolysis cell according to another embodiment of the present disclosure is schematically shown. Figure 8 Schematically shows Figure 7 Exploded view of FIG. 1 , in which the support portion is not shown. Figure 9 A side view schematically illustrates the front side of a plate according to an embodiment of the present disclosure. Figure 10 Schematically shows Figure 9 A side view of the back side of the plate is shown. Figure 11 Schematically shows Figure 9 A partial enlarged view of . Figure 12 Schematically shows Figure 10 A partial enlarged view of .

[0065] like Figure 2-Figure 12 As shown in an exemplary embodiment, a plurality of closed second waterlines 1412 may be formed on the surface of the boss 141 away from the groove 142 (i.e., the outer edge of the surface of the boss 141). Each second waterline 1412 may be formed by being recessed downward from the surface of the boss 141. Figure 6 The second waterline 1412 on the right side of the first electrode plate 14a) and the other side of the diaphragm 11 opposite to the first waterline 1411 (such as Figure 6 The right side of the middle diaphragm 11 is suitable for connecting with other plates 14 (such as Figure 6 The second electrode plate 14b in the battery is sealed and combined. Here, the diaphragm 11 does not contact the second waterline 1412. Since the second waterline 1412 is used to cooperate with the insulating gasket 19, the depth of the recess of the second waterline 1412 is relatively shallow, and the distance between adjacent second waterlines 1412 is relatively close. In addition, as Figures 9-12 As shown, the first waterline 1411 and / or the second waterline 1412 are not provided between the inner edge and the outer edge of the surface of the boss 141 , that is, the first waterline 1411 and the second waterline 1412 are provided separately on the surface of the boss 141 .

[0066] In one exemplary embodiment, some of the multiple first waterlines 1411 can be configured as microgrooves. These microgrooves can similarly be formed by recessing downward from the surface of the boss 141. The distance between adjacent microgrooves is smaller than the distance between adjacent second waterlines 1412. The recess depth of the microgrooves is shallower than that of the second waterlines 1412, meaning the recess depth of the microgrooves is shallower and the distance between adjacent microgrooves is closer. This creates less room for deformation at the contact point between the diaphragm 11 and the electrode plate 14 when the electrode plate 14 compresses the diaphragm 11, preventing significant deformation of the diaphragm 11 and further preventing rupture. For example, the distance between adjacent microgrooves can be greater than or equal to the thickness of the diaphragm 11 and less than or equal to 1.2 times the thickness of the diaphragm 11. The recess depth of the microgrooves can be equal to one-tenth the thickness of the diaphragm 11. The thickness of the diaphragm 11 can be between 0.4 mm and 0.5 mm. The dense groove can be the first waterline 1411 among the multiple first waterlines 1411 that is closer to the first groove 1421, that is, the first waterline 1411 that is used to directly contact the diaphragm 11 can be set as a dense groove, and the depression depth of the remaining first waterlines 1411 can also be shallower than the depression depth of the second waterline 1412, but deeper than the dense groove. Furthermore, the distance between the remaining adjacent first waterlines 1411 can also be smaller than the distance between adjacent second waterlines 1412, but greater than the distance between adjacent dense grooves.

[0067] In an exemplary embodiment, Figure 3-Figure 6 As shown, each electrode plate 14 may be provided with a groove 142. The center area of ​​the electrode plate 14 facing the diaphragm 11 is recessed inward relative to the boss 141 to form the groove 142. The outer periphery of the electrode plate 14 is raised to form an annular boss 141, and the boss 141 surrounds the groove 142. One of the electrode plates 14 (such as Figure 5 The groove 142 of the first plate 14a) is directly sealed and combined with the diaphragm 11 to form a chamber. Figure 5 The groove 142 of the second electrode plate 14b) is sealed and combined with the diaphragm 11 through the insulating gasket 19 to form another chamber.

[0068] In an exemplary embodiment, Figure 3-Figure 6 As shown, in an electrolysis unit 1, a first water line 1411 can be formed on a plate 14 ( Figure 6 On the surface of the boss 141 of the first electrode plate 14a on the left side of the middle (ie, the first waterline 1411 may be formed on a portion of the boss 141), the other electrode plate 14 ( Figure 6 The first waterline 1411 may not be provided on the boss 141 of the second electrode plate 14b on the right side. Figure 6 The left side of the middle diaphragm 11) and a plate 14 ( Figure 6The first electrode plate 14a on the left side is directly sealed and bonded by the first water line 1411. At the same time, the diaphragm 11 is on the other side ( Figure 6 The right side of the middle diaphragm 11) and the other plate 14 ( Figure 6 The surface of the boss 141 of the second electrode plate 14b on the right side of the middle electrode 14b) close to the groove 142 is connected by the insulating spacer 19. In other words, one side of the insulating spacer 19 ( Figure 6 The left side of the insulating spacer 19) and the outer edge of the diaphragm 11 (the part combined on the first waterline 1411) and a plate 14 ( Figure 6 The portion of the surface of the boss 141 of the first electrode plate 14a on the left side of the middle electrode surrounding the outer edge of the diaphragm 11 is directly sealed and bonded (directly contacted), and the other side of the insulating gasket 19 ( Figure 6 The right side of the insulating spacer 19) and the other plate 14 ( Figure 6 All surfaces of the boss 141 of the second electrode plate 14b on the right side of the center electrode are directly sealed and bonded (directly contacted). In other words, one side of the insulating gasket 19 can be in direct contact with both the boss 141 and the diaphragm 11, while the other side of the insulating gasket 19 can be in direct contact only with the boss 141.

[0069] In an alternative exemplary embodiment, as Figure 7-Figure 8 As shown, each electrode plate 14 may be provided with two grooves 142. The central areas of the two opposite sides of the electrode plate 14 (the left and right sides of the electrode plate 14) are recessed inward relative to the respective bosses 141 to form the grooves 142. The two opposite grooves 142 may be separated by a common bottom wall. Figure 8 As shown, the electrode plates (the first electrode plate 14 a and the second electrode plate 14 b ) provided with two grooves 142 may be referred to as bipolar plates.

[0070] The outer periphery of the two opposite sides of the electrode plate 14 (the left and right sides of the electrode plate 14) is raised to form an annular boss 141. The boss 141 can surround the groove 142. The edge of the diaphragm 11 can be clamped between the inner edges of the surface of the boss 141 of the two electrode plates 14. Both sides of each electrode plate 14 of the electrolytic cell 1 (the left and right sides of the electrode plate 14) and the corresponding diaphragm 11 form a cavity, so that each electrode plate 14 of the electrolytic cell 1 is connected to the other electrode plates 14 ( Figure 7 The electrode plates other than the first electrode plate 14a and the second electrode plate 14b shown in FIG. 1 form two more electrolytic units 1. In this way, two adjacent electrolytic units 1 share one electrode plate 14.

[0071] Specifically, if Figure 7-Figure 8As shown, two grooves 142 can be provided on the left and right sides of the first and second electrode plates 14a, 14b. A diaphragm 11 is located between the first and second electrode plates 14a, 14b, and forms a chamber with the groove 142 on the right side of the first electrode plate 14a and the groove 142 on the left side of the second electrode plate 14b, respectively. Another diaphragm 11 is located on the left side of the first electrode plate 14a and another electrode plate (not shown) located to the left of the first electrode plate 14a, and forms a chamber with the groove 142 on the left side of the first electrode plate 14a and the groove 142 on the right side of the other electrode plate located to the left of the first electrode plate 14a, thereby forming another electrolytic cell 1. The second electrode plate 14b forms another electrolytic cell 1 with another electrode plate (not shown) located to the right of the second electrode plate 14b in the same manner, and will not be further described here.

[0072] In detail, such as Figure 7-12 As shown, in an exemplary embodiment, the boss 141 may include a first boss 1413 and a second boss 1414 oppositely disposed on both sides of the plate 14. The groove 142 may include a first groove 1421 and a second groove 1422. The first boss 1413 may surround the first groove 1421. The second boss 1414 may surround the second groove 1422. For example, for Figure 7 For the first electrode plate 14a, the adjacent diaphragm 11 ( Figure 7 The right diaphragm 11) and the other diaphragm 11 ( Figure 7 The diaphragm 11 on the left side can be sealed with the first boss 1413 and the second boss 1414 to form a first chamber 191 with the first groove 1421 and a second chamber 192 with the second groove 1422. The first chamber 191 and the second chamber 192 can each accommodate a support portion 15.

[0073] Furthermore, if Figure 7-Figure 8 As shown, in an exemplary embodiment, the first water line 1411 can be formed between the membrane 11 (such as Figure 7 and Figure 8 The first protrusion 1413 is located on the surface of the first groove 1421, which is directly and sealably bonded to the diaphragm 11 on the right side of the first electrode plate 14a. For example, the right side of the first electrode plate 14a can be directly and sealably bonded to the diaphragm 11. The left side of the second electrode plate 14b can be sealedly bonded to the diaphragm 11 via an insulating gasket 19. That is, an insulating gasket 19 is provided between the left side of the second electrode plate 14b and the diaphragm 11. Since the left side of the second electrode plate 14b does not directly contact the diaphragm 11, the first waterline 1411 can be omitted from the left side of the second electrode plate 14b. The same arrangement can be used for other electrode plates.

[0074] like Figure 7-11 As shown, in an exemplary embodiment, another diaphragm 11 (such as Figure 8The diaphragm 11 on the left side can be separated by another insulating spacer 19 (such as Figure 8 Another insulating gasket 19 on the left side of the center is sealingly bonded to the surface of the second boss 1414 of the first electrode plate 14a. Multiple third waterlines 1415 can be formed on the surface of the second boss 1414 near the second groove 1422 (i.e., the inner edge of the second boss 1414). Multiple closed second waterlines 1412 can be formed on the surface of the second boss 1414 away from the second groove 1422 (i.e., the outer edge of the second boss 1414). In other words, second waterlines 1412 can be formed on the outer edges of the surfaces of both bosses 141. Second waterlines 1412 can be used for sealing with the insulating gasket 19. The depth of the recess of third waterlines 1415 can be the same as that of second waterlines 1412. In other words, third waterlines 1415 and first waterlines 1411 can be formed on the inner edges of the surfaces of both bosses 141, respectively. First waterlines 1411 can be used for direct sealing with the diaphragm 11. The third waterline 1415 can be sealed and combined with the diaphragm 11 through the insulating gasket 19. That is, one side of the insulating gasket 19 (such as Figure 8 The right side of the insulating gasket 19 can be directly sealed and combined with the second boss 1414. Figure 8 The left side of the insulating gasket 19 can be sealed and combined with the first boss 1413 and the diaphragm 11 at the same time. Figure 8 The outer edge of the surface (left side) of the insulating gasket 19 can be directly sealed and combined with the first boss 1413, and the inner edge of this side surface of the insulating gasket 19 can be directly sealed and combined with the diaphragm 11, that is, the inner edge of this side surface of the insulating gasket 19 can be sealed and combined with the first boss 1413 through the diaphragm 11.

[0075] Furthermore, if Figure 2-Figure 12 As shown, the liquid inlet 143 may include a first liquid inlet hole 1431 and a second liquid inlet hole 1432. The gas outlet 144 may include a first gas outlet 1441 and a second gas outlet 1442. The first liquid inlet hole 1431 and the second liquid inlet hole 1432 may be formed on the boss 141. The first gas outlet 1441 and the second gas outlet 1442 may be respectively formed on one side of the boss 141 radially opposite to the first liquid inlet hole 1431 and the second liquid inlet hole 1432. The first liquid inlet hole 1431 and the first gas outlet 1441 may be respectively connected to the first groove 1421 to allow the electrolyte to enter the first chamber 191 through the first liquid inlet hole 1431 and allow hydrogen or oxygen to be discharged from the first chamber 191 through the first gas outlet 1441. The second liquid inlet 1432 and the second gas outlet 1442 may be respectively connected to the second groove 1422 to allow the electrolyte to enter the second chamber 192 through the second liquid inlet 1432 and allow oxygen or hydrogen to be discharged from the second chamber 192 through the second gas outlet 1442 .

[0076] In an exemplary embodiment, the first liquid inlet hole 1431 can form, together with the first liquid inlet hole 1431 of the adjacent electrode plate 14, a first liquid inlet channel 4 that allows electrolyte to flow from the electrolyte supply device to the first chamber 191. The second liquid inlet hole 1432 can form, together with the second liquid inlet hole 1432 of the adjacent electrode plate 14, a second liquid inlet channel 5 that allows electrolyte to flow from the electrolyte supply device to the second chamber 192. The first gas outlet hole 1441 can form, together with the first gas outlet hole 1441 of the adjacent electrode plate 14, a first gas outlet channel 6 that allows gas exhausted from the first chamber 191 to flow into the gas collection device. The second gas outlet hole 1442 can form, together with the second gas outlet hole 1442 of the adjacent electrode plate 14, a second gas outlet channel 7 that allows gas exhausted from the second chamber 192 to flow into the gas collection device.

[0077] Furthermore, the through hole 145 can respectively pass through the first boss 1413 to connect the first liquid inlet hole 1431 with the first groove 1421, pass through the second boss 1414 to connect the second liquid inlet hole 1432 with the second groove 1422, pass through the first boss 1413 to connect the first gas outlet hole 1441 with the first groove 1421, and pass through the second boss 1414 to connect the second gas outlet hole 1442 with the second groove 1422, so that the electrolyte enters the first chamber 191 through the first liquid inlet hole 1431, the electrolyte enters the second chamber 192 through the second liquid inlet hole 1432, the first gas (for example, oxygen) formed after electrolysis in the first chamber 191 flows out from the first gas outlet hole 1441, and the second gas (for example, hydrogen) formed after electrolysis in the second chamber 192 flows out from the second gas outlet hole 1442. Furthermore, the first liquid inlet hole 1431 and the second liquid inlet hole 1432 may not be directly connected to the through hole 145 , but may be connected to the through hole 145 via the sub-liquid inlet hole 1434 .

[0078] In an exemplary embodiment, Figure 2-Figure 11 As shown, each plate 14 may be provided with a plurality of positioning holes 146, which are suitable for Figure 1During installation of the multiple plates of the multiple electrolytic cells shown, positioning rods are passed through the positioning holes to position the multiple plates. Positioning holes 146 can be formed on the boss 141. Through holes 145 can connect positioning holes 146 with grooves 142. After the electrolytic cell is installed and during operation, they can serve as liquid inlets or gas outlets, allowing electrolyte to enter the chamber through positioning holes 146 or allowing gases generated after electrolysis to flow out through positioning holes 146. In this way, by connecting positioning holes 146 with grooves 142, it can not only achieve positioning and installation, but also increase the flow path of electrolyte and / or gas, thereby improving electrolysis efficiency and gas extraction efficiency. Specifically, during operation, the first ends of the positioning holes 146 that are partially aligned among the multiple positioning holes 146 can be connected to an external electrolyte supply device, and the other ends can be connected to the first groove 1421 or the second groove 1422, respectively, to allow electrolyte to enter the first groove 1421 or the second groove 1422 through positioning holes 146. Furthermore, the first ends of another portion of the aligned positioning holes 146 among the plurality of positioning holes 146 can be connected to the gas collection device, and the other ends can be respectively connected to the first groove 1421 or the second groove 1422, so as to allow the electrolyzed gas to flow out of the first groove 1421 or the second groove 1422 through the positioning holes 146 to the gas collection device. Furthermore, the positioning holes 146 can form a positioning liquid inlet channel with the positioning holes 146 of the adjacent electrode plate 14, thereby allowing the electrolyte to flow out of the positioning liquid inlet channel. Furthermore, the positioning holes 146 can form a positioning gas outlet channel with the positioning holes 146 of the adjacent electrode plate 14, thereby allowing the gas to flow out of the positioning gas outlet channel to the gas collection device.

[0079] Furthermore, a guide groove (not shown in the figure) may be formed on the end plate 2 of the electrolytic cell. In an exemplary embodiment, the liquid inlet 143 may include a main liquid inlet 1433 and a sub-liquid inlet 1434. The main liquid inlet 1433 may form a main liquid inlet channel with the main liquid inlet 1433 of the adjacent electrode plate. The main liquid inlet 1433 may include the above-mentioned first liquid inlet 1431 and second liquid inlet 1432. In this embodiment, the first liquid inlet 1431 and the second liquid inlet 1432 may not be directly connected to the through hole 145, but may be connected to the through hole 145 through the sub-liquid inlet 1434 or the positioning hole 146.

[0080] The sub-liquid inlet holes 1434 can form sub-liquid inlet channels with the sub-liquid inlet holes 1434 of adjacent electrode plates. The sub-liquid inlet channels can be connected to the main liquid inlet channel via a guide groove. The electrolyte can enter the electrolytic cell through the main liquid inlet channel and flow through the guide groove at the end plate 2 of the electrolytic cell into the sub-liquid inlet channels, thereby entering the sub-liquid inlet holes 1434 of each electrode plate 4.

[0081] Furthermore, the sub-liquid inlet 1434 and the positioning hole 146 can be respectively provided with a through hole 145 connected to the groove 142. The sub-liquid inlet 1434 and the positioning hole 146 can be arranged near the main liquid inlet 1433. Positioning holes 146 can be provided near the first air outlet 1441, the second air outlet 1442, the first liquid inlet 1431 and the second liquid inlet 1432. The positioning hole 146 can form a positioning liquid inlet channel or a positioning air outlet channel with the positioning hole 146 of the adjacent plate. The positioning liquid inlet channel can be arranged radially opposite to the positioning air outlet channel. The electrolyte can enter the groove 142 through the positioning liquid inlet channel. The gas formed after electrolysis can flow out of the groove 142 through the positioning air outlet channel.

[0082] Furthermore, at the end plate 2 of the electrolytic cell, the guide groove can also connect the total liquid inlet channel with the positioning liquid inlet channel. The electrolyte in the total liquid inlet channel can flow from the guide groove into the positioning liquid inlet channel.

[0083] According to the embodiment of the present disclosure, by providing a guide groove, a main liquid inlet channel, a sub-liquid inlet channel and a positioning liquid inlet channel, the electrolyte does not enter the chamber directly from the main liquid inlet channel, but enters the chamber through the sub-liquid inlet channel and the positioning liquid inlet channel, which can isolate the external pressure interference, thereby avoiding external pressure interference in the electrolysis process.

[0084] In detail, Figures 9-12 As shown, the waistline 147 on the same side of the electrode plate 14 can enclose the liquid inlet 143 and the gas outlet 144 connected to the groove 142 to form a closed area. Figure 9 As shown, the waistline 147 located on the front of the electrode plate 14 can enclose the first liquid inlet 1431, the second liquid inlet 1432, the first air outlet 1441 and the second air outlet 1442 on the front of the electrode plate 14 to form four closed areas. Figure 10 As shown, the waistline 147 on the back of the electrode plate 14 can enclose the first liquid inlet 1431 , the second liquid inlet 1432 , the first air outlet 1441 and the second air outlet 1442 on the back of the electrode plate 14 to form four closed areas.

[0085] Furthermore, the waistline 147 and the insulating gasket 19 cooperate to effectively seal and isolate the first and second air outlets 1441, 1442. When the air pressure in the two chambers 11 is high, the insulating gasket 19 is partially embedded in the waistline 147, thereby preventing a gap between the insulating gasket 19 and the electrode plate 4 at the locations of the first and second air outlets 1441, 1442. This results in a channel being formed between the first and second air outlets 1441, 1442, thereby preventing hydrogen and oxygen from mixing and effectively improving the purity of the hydrogen and oxygen.

[0086] Specifically, if Figure 9 As shown, four sets of waist lines 147 can be set on the front of the plate 14, located Figure 9 The waistline 147 in the upper left center is arranged around the first liquid inlet 1431, the positioning hole 146 and the sub-liquid inlet 1434 to form a closed area. Figure 9 The waistline 147 at the lower left of the middle is arranged at the periphery of the second liquid inlet hole 1432, the positioning hole 146 and the sub-liquid inlet hole 1434 to form a closed area. Each set of waistlines 147 can be provided with multiple waistlines 147. Figure 9 The waistline 147 in the upper right center is arranged around the second air outlet 1442 and the positioning hole 146 to form a closed area. Figure 9 The waistline 147 at the lower right center is disposed around the first air outlet 1441 and the positioning hole 146 to form a closed area.

[0087] like Figure 10 As shown, four sets of waist lines 147 can also be provided on the back of the plate 14, located Figure 10 The waistline 147 in the upper right center is arranged around the first liquid inlet 1431, the positioning hole 146 and the sub-liquid inlet 1434 to form a closed area. Figure 10 The waistline 147 in the lower right middle is arranged around the second liquid inlet 1432, the positioning hole 146 and the sub-liquid inlet 1434 to form a closed area. Figure 10 The waistline 147 on the upper left side of the middle is arranged around the second air outlet 1442 and the positioning hole 146 to form a closed area. Figure 10 The waistline 147 at the lower left center is disposed around the first air outlet 1441 and the positioning hole 146 to form a closed area.

[0088] In an exemplary embodiment, Figure 2-Figure 12 As shown, the insulating gasket 19 is provided with matching clearance holes 193 at positions opposite to the liquid inlet hole 143 and the air outlet hole 144. Furthermore, the insulating gasket 19 is provided with clearance holes 193 at positions opposite to the first liquid inlet hole 1431 and the second liquid inlet hole 1432, as well as at positions opposite to the first air outlet hole 1441 and the second air outlet hole 1442. Each clearance hole 193 penetrates the insulating gasket 19, thereby allowing the electrolyte to pass through the clearance hole 193 and enter the first chamber 191 and the second chamber 192 through the first liquid inlet hole 1431 and the second liquid inlet hole 1432, respectively, and allowing the generated hydrogen and oxygen to be discharged through the corresponding clearance holes 193 and the air outlet hole 42, respectively. Similarly, the insulating gasket 19 is also provided with matching clearance holes 193 at positions opposite to the positioning hole 146.

[0089] In an exemplary embodiment, Figure 8As shown, first groove 1421 can be deeper than second groove 1422. After electrolysis, the gas formed in first chamber 191 can be oxygen, and the gas formed in second chamber 192 can be hydrogen. Because diaphragm 11 forms second chamber 192 based on insulating spacer 19 and second boss 1414, that is, insulating spacer 19 and second boss 1414 jointly provide space for second chamber 192, the depth of second groove 1422 can be shallower than the depth of first groove 1421, thereby making the volumes of first chamber 191 and second chamber 192 similar.

[0090] In an exemplary embodiment, Figure 2-Figure 3 and Figure 7 As shown, the support portion 15 is located on the side of the electrode plate 14 facing the diaphragm 11. The support portion 15 is provided with a flow channel to guide the electrolyte to disperse and flow in each chamber. The elasticity of the two support portions 15 is different.

[0091] In an exemplary embodiment, Figure 2-Figure 3 and Figure 7 As shown, the two support portions 15 can be respectively located in the two chambers and respectively contact the cathode layer 16 and the anode layer 17, so that the cathode layer 16 and the anode layer 17 are in close contact with the diaphragm 11. A flow channel is provided on at least one side of each support portion 15 facing the diaphragm 11 to guide the electrolyte to flow dispersedly in the chamber. The flow channel can be a serpentine structure, a grid structure, a mesh structure, etc., and is specifically defined according to actual needs. By providing the flow channel, the electrolyte can be more evenly dispersed in each chamber, thereby improving the electrolysis efficiency.

[0092] According to an embodiment of the present disclosure, the elasticity of the support portions 15 located on both sides of the diaphragm 11 is different, that is, one has high elasticity and the other has low elasticity. The support portions 15 with different elasticities can be formed by using different materials, or the elasticity of the two support portions 15 can be made different by using different structures. The support portion 15 is in contact with the cathode layer 16 or the anode layer 17, and supports the cathode layer 16 or the anode layer 17 to be tightly combined with the diaphragm 11, providing the required rigidity. Since the temperature and pressure will change during the electrolysis reaction, the diaphragm 11 will expand and contract or move locally based on the different pressures and temperature changes on both sides. The two support portions 15 with different elasticity can provide the rigidity required to maintain the close contact between the diaphragm 11 and the cathode layer 16 and the anode layer 17, while providing the required expansion and contraction space for the diaphragm 11.

[0093] In an exemplary embodiment, Figure 2-Figure 3 and Figure 7 As shown, the first surface 151 of the support portion 15 facing the separator 11 has a contact surface that is in surface contact with the cathode layer 16 or the anode layer 17 .

[0094] Specifically, the flow channel is provided on the first surface 151 of the support portion 15 facing the diaphragm 11, dividing the first surface 151 into multiple regions. Each region of the first surface 151 forms a contact surface and is in surface contact with the cathode layer 16 or the anode layer 17. This disperses the compressive force exerted on the cathode layer 16, the anode layer 17, and the diaphragm 11, reducing stress concentration and minimizing damage to the cathode layer 16, the anode layer 17, and the diaphragm 11.

[0095] In an exemplary embodiment, the electrode plate 14 and the support portion 15 (the plate-shaped support portion 153 and the mesh-shaped support portion 154 described below) can be integrally formed. Specifically, the electrode plate 14 and the support portion 15 are integrally formed by CNC machining, the machining method of which is not limited herein.

[0096] In an exemplary embodiment, Figure 3 As shown, the electrode plate 14 and support portion 15 are formed as separate components. The electrode plate 14 and support portion 15 are in contact and mating with each other. The support portion 15 and electrode plate 14 are two separate components, adopting a modular structure, allowing the support portion 15 to be replaced as needed. If either the support portion 15 or the electrode plate 14 is damaged, only the support portion 15 or the electrode plate 14 can be replaced, effectively reducing costs.

[0097] Figure 13 A partial view of a mesh support portion according to an embodiment of the present disclosure is schematically shown. Figure 14 A partial diagram of a grid cell according to an embodiment of the present disclosure is schematically shown. Figure 15 A partial side view of a mesh support portion according to an embodiment of the present disclosure is schematically shown.

[0098] In an exemplary embodiment, Figure 2-Figure 3 、 Figure 7 As shown, the support portion 15 of the first support assembly 12 is formed as a plate-shaped support portion 153, and the first surface 151 of the plate-shaped support portion 153 is provided with a first flow channel 1531. Figure 12-15 As shown, the support portion 15 of the second support assembly 13 is formed as a mesh support portion 154 , which is provided with a second flow channel 1541 . The second flow channel 1541 is located on the first surface 151 of the mesh support portion 154 , or on the first surface 151 and the second surface 152 opposite to the first surface 151 .

[0099] Specifically, if Figure 2-Figure 3 、 Figure 7 As shown, the support portion 15 on the left side of the diaphragm 11 is formed as a plate-shaped support portion 153. First flow channels 1531 are located on the first surface 151 of the plate-shaped support portion 153. Multiple regions of the first surface 151 are interlaced horizontally and vertically to form a grid-like flow channel. The second surface 152 of the plate-shaped support portion 153 is in surface contact with the groove 142 of the electrode plate 14.

[0100] like Figure 2-Figure 3 、 Figure 6 、 Figure 11 As shown, the support portion 15 on the right side of the diaphragm 11 is formed as a mesh support portion 154. The second flow channel 1541 is located on the first surface 151 of the mesh support portion 154, or on the first surface 151 and the second surface 152 opposite to the first surface 151.

[0101] In such an embodiment, the first surface 151 contacts the cathode layer 16 or the anode layer 17. The flow channel is located on the first surface 151 of the support portion 15 and can guide the electrolyte to flow in the flow channel, thereby dispersing the electrolyte in the chamber, increasing the electrolyte coverage area in the chamber, increasing the contact area between the electrolyte and the cathode layer 16 or the anode layer 17, and improving the electrolysis efficiency.

[0102] In an exemplary embodiment, Figure 13-15 As shown, the mesh support portion 154 includes a plurality of mesh units 1542 connected to each other. Each mesh unit 1542 includes at least three connecting rods 1543, and the at least three connecting rods 1543 are sequentially connected to form a closed structure. Figure 13 and Figure 14 As shown, the grid unit 1542 includes four connecting rods 1543, and the first end of each connecting rod 1543 overlaps the first contact surface 1544 of the adjacent connecting rod 1543 ( Figure 14 The second end is connected to the second contact surface 1545 (opposite to the first contact surface 1544) of another adjacent connecting rod 1543. Figure 14 bottom surface in the middle).

[0103] In an exemplary embodiment, Figure 14 and Figure 15 As shown, the first end of each connecting rod 1543 is located on the first surface 151 ( Figure 15 The second end of each connecting rod 1543 is located on the second surface 152 ( Figure 15 The lower surface of the mesh support portion 154 is provided with each connecting rod 1543 obliquely arranged between the first surface 151 and the second surface 152, and forms a second flow channel 1541 with the gap between the first surface 151 and the second surface 152. The second flow channel 1541 is located on the first surface 151 and the second surface 152 of the mesh support portion 154.

[0104] Figure 16 A partial view of a mesh support portion according to another embodiment of the present disclosure is schematically shown. Figure 17 A partial diagram of a grid cell according to another embodiment of the present disclosure is schematically shown.

[0105] In another exemplary embodiment, Figure 16 and Figure 17As shown, the grid unit 1542 includes four connecting rods 1543. The first end ( Figure 16 The lower end of the grid) is located at the first contact surface 1544 ( Figure 17 On the top surface of the grid monomer 1542, the second end ( Figure 16 The upper end of the grid) is located at the second contact surface 1545 ( Figure 17 on the bottom surface of the ).

[0106] Figure 18 A partial side view of a mesh support portion according to another embodiment of the present disclosure is schematically shown.

[0107] In an exemplary embodiment, Figure 16 and Figure 18 As shown, the first end of each grid monomer 1542 ( Figure 18 The right end of the middle grid unit 1542 is located on the first surface 151 ( Figure 18 The upper surface in the middle), the second end of each grid monomer 1542 ( Figure 18 The left end of the middle grid unit 1542 is located on the second surface 152 ( Figure 18 The lower surface in the middle), each grid unit 1542 is obliquely arranged between the first surface 151 and the second surface 152, and forms a second flow channel 1541 with the gap between the first surface 151 and the second surface 152.

[0108] According to an embodiment of the present disclosure, the second flow channel 1541 of the mesh support portion 154 guides the electrolyte to flow alternately on the first surface 151 and the second surface 152 of the mesh support portion 154, so that the electrolyte in the cavity is evenly dispersed, increasing the contact area between the electrolyte and the cathode layer 16 and / or the anode layer 17, and improving the electrolysis efficiency.

[0109] In an exemplary embodiment, Figure 2 As shown, a nickel foam layer 18 is provided between the cathode layer 16 and / or the anode layer 17 and the support portion 15. The nickel foam layer 18 can play a catalytic role, thereby improving catalytic efficiency and electrolysis efficiency.

[0110] The present disclosure also provides a method for processing the above-mentioned electrode plate. Specifically, the through hole 145 of the electrode plate 14 can be formed by radially punching from the groove 142 toward the boss 141 .

[0111] In an exemplary embodiment, Figure 1As shown, the electrolytic unit 1 is arranged vertically, and multiple electrolytic units 1 are stacked in sequence in the horizontal direction to form a stacking structure. The support assembly and the diaphragm 11 in the stacking structure are arranged alternately in sequence, and the support assembly and the diaphragm 11 on both sides of the diaphragm 11 form two chambers suitable for containing electrolyte. The two end plates 2 are respectively located on the left and right sides of the stacking structure, and the end plates 2 are coaxially aligned with the stacking structure. The mounting assembly 3 includes a plurality of bolts, and the plurality of bolts surround the outside of the stacking structure and are evenly spaced. A plurality of mounting holes for mounting bolts are provided around the periphery of the end plate 2. A plurality of bolts pass through the plurality of mounting holes, respectively, and are suitable for fixing the stacking structure to the two end plates 2.

[0112] In an exemplary embodiment, Figures 1-8 As shown, both sides of each support assembly of the electrolysis unit 1 of the electrolysis tank form a chamber with the corresponding diaphragm 11 , so that each support assembly forms another electrolysis unit 1 with other support assemblies.

[0113] Specifically, if Figure 2-Figure 7 As shown, each support assembly of the electrolytic cell 1 includes two electrode plates 14. The stacked electrode plates 14 are alternately arranged with the diaphragms 11. The central area of ​​each electrode plate 14 on the side facing the diaphragm 11 is recessed inward relative to the boss 141 to form a groove 142. In other words, each electrode plate 14 is provided with two grooves 142, one on the left and one on the right side of the electrode plate 14.

[0114] Furthermore, if Figure 2-Figure 8 As shown, the first groove 1421 on the right side of the first electrode plate 14a and the second groove 1422 on the left side of the second electrode plate 14b form a chamber with the diaphragm 11, thereby forming an electrolytic cell 1. The second groove 1422 on the left side of the first electrode plate 14a and the groove (not shown) on the right side of another electrode plate (not shown) located to the left of the first electrode plate 14a form another electrolytic cell 1. The first groove 1421 on the right side of the second electrode plate 14b and the groove (not shown) on the left side of another electrode plate (not shown) located to the right of the second electrode plate 14b form yet another electrolytic cell 1.

[0115] According to an embodiment of the present disclosure, each electrode plate 14 is provided with two grooves 142, so that each electrode plate 14 of the electrolytic unit 1 forms a chamber with the corresponding diaphragm 11, and each support assembly forms another electrolytic unit 1 with other support assemblies, which can reduce the volume of the stacking structure and thus reduce the volume of the electrolytic cell.

[0116] In an exemplary embodiment, Figure 1-Figure 7 As shown, the chamber of each electrolysis unit 1 includes a first chamber 191 ( Figure 7 The chamber on the left side of the diaphragm 11) and the second chamber 192 ( Figure 7In this way, the first chambers 191 and the second chambers 192 of the plurality of electrolytic units 1 of the electrolytic tank are alternately arranged in sequence.

[0117] Each liquid inlet hole 143 communicating with the first chamber 191 is aligned in the stacking direction to form a first liquid inlet channel 4. Each liquid inlet hole 143 communicating with the second chamber 192 is aligned in the stacking direction to form a second liquid inlet channel 5. The first liquid inlet channel 4 and the second liquid inlet channel 5 are configured to allow electrolyte to enter the first chamber 191 and the second chamber 192 of each electrolytic cell 1, respectively.

[0118] In an exemplary embodiment, Figures 1-12 As shown, each gas outlet hole 144 communicating with the first chamber 191 is oppositely arranged to form a first gas outlet channel 6, and each gas outlet hole 144 communicating with the second chamber 192 is oppositely arranged to form a second gas outlet channel 7. The first gas outlet channel 6 and the second gas outlet channel 7 are constructed to allow hydrogen or oxygen to be discharged.

[0119] According to the embodiments of the present disclosure, the electrolyte can enter the first chamber 191 and the second chamber 192 of each electrolytic cell 1 through the first liquid inlet channel 4 and the second liquid inlet channel 5, respectively. Under the action of direct current, the electrolyte in the first chamber 191 and the second chamber 192 is dissociated to release hydrogen and oxygen. The hydrogen and oxygen are discharged through the first outlet channel 6 and the second outlet channel 7, respectively. Multiple electrolytic cells 1 are arranged in a stacked structure of the electrolytic cell to achieve integration.

[0120] The embodiments of the present disclosure are described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although each embodiment has been described separately above, this does not mean that the measures in each embodiment cannot be used in combination to advantage. The scope of the present disclosure is defined by the appended claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A plate suitable for an electrolytic cell, characterized in that: include: groove; an annular boss surrounding the groove, the boss being used to seal and engage with an edge of a diaphragm of the electrolytic cell so that the diaphragm and the groove form a chamber for electrolyzing the electrolyte; a liquid inlet hole formed on the boss; an air outlet hole formed on a side of the boss radially opposite to the liquid inlet hole; a plurality of through holes, each of the through holes being formed to connect the liquid inlet or the gas outlet with the groove, so as to allow the electrolyte to enter the chamber through the liquid inlet or allow the gas formed after electrolysis to flow out of the chamber to the gas outlet; as well as A processing groove is formed at a position where the bottom of the groove abuts against the side wall of the boss, and each of the through holes extends to the processing groove.

2. The electrode plate according to claim 1, characterized in that The processing groove includes a plurality of spaced-apart cutouts, and one of the cutouts extends to one of the through holes.

3. The electrode plate according to claim 1, characterized in that The processing groove includes a plurality of paving grooves, each of the paving grooves is close to the liquid inlet or the air outlet, and a plurality of the through holes extend to one of the paving grooves.

4. The electrode plate according to claim 2, characterized in that: The boss includes a first boss and a second boss that are oppositely disposed, and the groove includes a first groove surrounded by the first boss and a second groove surrounded by the second boss.

5. The electrode plate according to claim 4, characterized in that: The two adjacent diaphragms are sealedly coupled with the first boss and the second boss to form a first chamber with the first groove and a second chamber with the second groove.

6. The electrode plate according to claim 5, characterized in that: The first boss is directly and hermetically combined with the diaphragm, and the second boss is hermetically combined with the other diaphragm via an insulating gasket.

7. The electrode plate according to claim 1, characterized in that: Also includes: A plurality of positioning holes are formed on the boss, and the through hole connects the positioning holes with the groove.

8. The electrode plate according to claim 4, characterized in that: The liquid inlet hole comprises: a first liquid inlet hole, the first liquid inlet hole being in communication with the first groove, the first liquid inlet hole being configured to form a first liquid inlet channel with the first liquid inlet hole of the adjacent electrode plate; A second liquid inlet hole is connected to the second groove, and the second liquid inlet hole is configured to form a second liquid inlet channel with the second liquid inlet hole of the adjacent electrode plate.

9. The electrode plate according to claim 8, characterized in that: The vent hole comprises: a first air outlet hole formed on a side of the boss radially opposite to the first liquid inlet hole, the first air outlet hole being in communication with the first groove, and being configured to form a first air outlet channel with the first air outlet hole of the adjacent electrode plate; The second air outlet is formed on a side of the boss radially opposite to the second liquid inlet. The second air outlet is connected to the second groove. The second air outlet is configured to form a second air outlet channel with the second air outlet of the adjacent electrode plate.

10. The electrode plate according to claim 5, characterized in that: The first groove is deeper than the second groove; After electrolysis, oxygen is generated from the first chamber and hydrogen is generated from the second chamber.

11. An electrolysis unit, characterized in that include: At least two plates according to any one of claims 1 to 10; a diaphragm, disposed between the two electrode plates to form a first chamber and a second chamber with the two electrode plates respectively; a cathode layer, located in the first chamber or the second chamber, so that the electrolyte reacts to release hydrogen; The anode layer is located in the second chamber or the first chamber on a side of the diaphragm opposite to the cathode layer, so that the electrolyte reacts to release oxygen.

12. An electrolytic cell, characterized in that: include: A plurality of electrolytic units according to claim 11, wherein the plurality of electrolytic units are stacked in sequence to form a stacked structure; two end plates, respectively located at two ends of the plurality of stacked structures; The mounting assembly is adapted to fix the stacking structure to the two end plates.

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