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 polar plate comprises a first boss; the second boss is opposite to the first boss; the first groove is surrounded by the first boss, and the first groove and a diaphragm of the electrolytic bath form a first cavity for electrolyzing electrolyte; the second groove is surrounded by the second boss, and the second groove and the other diaphragm of the electrolytic bath form a second cavity for electrolyzing the electrolyte; the first air outlet hole is formed in the first boss and is communicated with the first groove; the second air outlet hole is formed in the second boss and is close to the first air outlet hole, and the second air outlet hole is communicated with the second groove; a part of the waist lines are arranged outside the first air outlet hole in a surrounding mode, the other part of the waist lines are arranged outside the second air outlet hole in a surrounding mode, the waist lines are sunken downwards from the surface of the first boss or the surface of the second boss, and under the condition that the pole plate and the insulation spacer are combined in a sealed mode, the waist lines allow the part, covering the waist lines, of the insulation spacer to be extruded into the waist lines; and a closed area for preventing gas from flowing out is formed by the insulating gasket and the insulating gasket.

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 that can be used to electrolyze water to produce hydrogen. Its working principle is to use the energy provided by direct current to decompose water molecules. Under the action of the electric field, water molecules are reduced to generate hydrogen at the cathode , oxidized at the anode to generate oxygen The explosion limit range of the mixture formed by mixing hydrogen and oxygen is relatively wide, which means that there is a risk of explosion even at a relatively low volume concentration of hydrogen.

[0003] Although a membrane is used to isolate hydrogen and oxygen in the related art, hydrogen and oxygen are still mixed in actual operation. 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 effectively prevent the mixing of hydrogen and oxygen.

[0005] According to a first aspect of the present disclosure, there is provided an electrode plate suitable for an electrolytic cell, comprising: a first boss; a second boss arranged opposite to the first boss; a first groove surrounded by the first boss, for forming a first chamber for electrolyzing an electrolyte with a diaphragm of the electrolytic cell; a second groove surrounded by the second boss, for forming a second chamber for electrolyzing an electrolyte with another diaphragm of the electrolytic cell; a first air outlet formed on the first boss and connected to the first groove; a second air outlet formed on the second boss and adjacent to the first air outlet, the second air outlet being connected to the second groove; and a plurality of waistlines, some of the waistlines being arranged outside the first air outlet, and other parts of the waistlines being arranged outside the second air outlet and recessed downward from the surface of the first boss or the second boss, wherein, when the electrode plate is sealed with an insulating gasket, the waistline is used to allow the portion of the insulating gasket covering the waistline to be squeezed into the waistline, so as to form a closed area with the insulating gasket for preventing gas from flowing out.

[0006] Optionally, the electrode plate further includes: a plurality of liquid inlet holes, each of the liquid inlet holes is formed on the first boss or the second boss and communicates with the first groove or the second groove to allow the electrolyte to enter the first chamber or the second chamber.

[0007] Optionally, the liquid inlet includes:

[0008] a first liquid inlet hole, the first liquid inlet hole being connected to the first groove to allow the electrolyte to enter the first chamber through the first liquid inlet hole; and a second liquid inlet hole, the second liquid inlet hole being connected to the second groove to allow the electrolyte to enter the second chamber through the second liquid inlet hole.

[0009] Optionally, a guide groove is formed on the end plate of the electrolytic cell, and the guide groove is recessed downward from the inner surface of the end plate. The liquid inlet hole includes: a total liquid inlet hole, which is configured to form a total liquid inlet channel with the total liquid inlet hole of the adjacent electrode plate; and a sub-liquid inlet hole, which is connected to the first groove or the second groove, and the sub-liquid inlet hole is configured to form a sub-liquid inlet channel with the sub-liquid inlet hole of the adjacent electrode plate, and the sub-liquid inlet channel is connected to the total liquid inlet channel through the guide groove, and the electrolyte flows into the sub-liquid inlet hole through the guide groove.

[0010] Optionally, the electrode plate further includes a plurality of positioning holes, each of the positioning holes being formed on the first boss or the second boss, connected to the first groove or the second groove and close to the liquid inlet hole, the first air outlet hole or the second air outlet hole, the positioning hole being configured to form a positioning liquid inlet channel with the positioning holes of the adjacent electrode plate, and the guide groove connecting the positioning liquid inlet channel with the total liquid inlet channel to allow the electrolyte to flow from the guide groove into the positioning hole.

[0011] Optionally, the electrode plate further includes a plurality of through holes, each of the through holes extending from the liquid inlet, the positioning hole, the first air outlet or the second air outlet to the first groove or the second groove, so as to allow the electrolyte to enter the first chamber and / or the second chamber from the liquid inlet and / or the positioning hole; and to allow the gas formed after electrolysis to flow out from the first chamber to the first air outlet and / or the positioning hole, and from the second chamber to the second air outlet and / or the positioning hole.

[0012] Optionally, a plurality of closed first waterlines surrounding the first groove are formed on the surface of the first boss close to the first groove, each first waterline is recessed downward from the surface of the boss, and the edge of the diaphragm is directly sealed and combined with the plurality of first waterlines to form the first chamber with the first groove.

[0013] Optionally, a plurality of closed second waterlines are formed on the surface of the first boss away from the first groove, and the second waterlines and the other side of the diaphragm opposite to the first waterlines are suitable for sealing with other plates through the insulating gasket.

[0014] Optionally, the other diaphragm is sealed to the surface of the second boss through another insulating gasket, a plurality of third waterlines are formed on the surface of the second boss close to the second groove, and a plurality of closed second waterlines are formed on the surface of the second boss away from the second groove.

[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 embodiment of the present disclosure, by setting a plurality of waistlines, during the process of integrating the electrolytic cell, the portion of the insulating gasket covering the waistline can be squeezed into the waistline based on the elasticity of the insulating gasket, thereby forming a closed area for preventing gas from flowing out with the insulating gasket, so that the periphery of the first air outlet and the second air outlet are respectively sealed in the closed area to prevent the electrolyte and gas from flowing into and out of the closed area, thereby effectively avoiding the mixing of hydrogen and oxygen. 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 cross-sectional view of an electrolysis cell according to an embodiment of the present disclosure is schematically shown.

[0023] Figure 5 Schematically shows Figure 3 Exploded view of the embodiment, in which the support portion is not shown.

[0024] Figure 6 A side view schematically illustrates the front side of a plate according to an embodiment of the present disclosure.

[0025] Figure 7 Schematically shows Figure 6 A side view of the back side of the plate is shown.

[0026] Figure 8 Schematically shows Figure 6 A partial enlarged view of .

[0027] Figure 9 Schematically shows Figure 7 A partial enlarged view of .

[0028] Figure 10 A partial view of a mesh support portion according to an embodiment of the present disclosure is schematically shown.

[0029] Figure 11 A partial diagram of a grid cell according to an embodiment of the present disclosure is schematically shown.

[0030] Figure 12 A partial side view of a mesh support portion according to an embodiment of the present disclosure is schematically shown.

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

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

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

[0034] Reference numerals

[0035] 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. Fixed hole Position hole; 147, waistline; 148, incision; 149, make way groove; 15, support part; 151, first surface; 152, second surface; 153, plate-shaped support part; 1531, first flow channel; 154, mesh 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, make way 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

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Figure 1A three-dimensional schematic diagram of an electrolytic cell according to an embodiment of the present disclosure is schematically shown.

[0041] 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.

[0042] 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.

[0043] The embodiment of the present disclosure provides an electrolysis unit 1 of an electrolytic cell. Figure 2-Figure 3 As 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 two support assemblies each include a plate 14 and a support portion 15. The diaphragm 11 may be sealed and bonded between the two plates 14 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.

[0044] 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.

[0045] In detail, the two groups of support components may include first support components 12 ( Figure 2 the upper 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.

[0046] 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., depending on actual needs.

[0047] Figure 4 A cross-sectional view of an electrolysis cell according to an embodiment of the present disclosure is schematically shown. Figure 5 Schematically shows Figure 3 Exploded view of the embodiment, in which the support portion is not shown. Figure 6 A side view schematically illustrates the front side of a plate according to an embodiment of the present disclosure. Figure 7 Schematically shows Figure 6 A side view of the back side of the plate is shown. Figure 8 Schematically shows Figure 6 A partial enlarged view of . Figure 9 Schematically shows Figure 7 A partial enlarged view of .

[0048] like Figure 2-Figure 3 As shown, each electrode 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. The boss 141 may surround the groove 142. It is understood that the groove 142 may also be configured as a rectangle or a polygon, depending on actual needs. For convenience, the following description will take the case where the electrode plate 14 is in the shape of a circular plate and is formed with an annular boss 141 and a circular groove 142 as an example.

[0049] 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 3The 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 144 can be connected to the groove 142 to allow hydrogen or oxygen to be discharged. Furthermore, the through hole 145 can extend from the liquid inlet 143 through the boss 141 to the groove 142 to connect the liquid inlet 143 with the groove 142, thereby allowing the electrolyte to enter the chamber through the liquid inlet 143. The through hole 145 can also extend from the gas outlet 144 through the boss 141 to the groove 142 to connect the gas outlet 144 with the groove 142, thereby allowing the gas formed after electrolysis to flow out of the chamber to the gas outlet 144. It can be understood that the through holes 145 at the liquid inlet 143 and the gas outlet 144 can adopt the same structure.

[0050] In detail, such as Figure 4-Figure 9 As shown, the boss 141 may include a first boss 1413 and a second boss 1414 disposed oppositely. The groove 142 may include a first groove 1421 and a second groove 1422. The two opposite grooves 142 (the first groove 1421 and the second groove 1422) may be separated by a common bottom wall. Figure 5 As shown, the plates (first plate 14a and second plate 14b) with two grooves 142 can be called bipolar plates. The first boss 1413 can surround the first groove 1421. The second boss 1414 can surround the second groove 1422. For example, for Figure 4 For the first electrode plate 14a, the adjacent diaphragm 11 ( Figure 4 The right diaphragm 11) and the other diaphragm 11 ( Figure 4 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.

[0051] The edge of the diaphragm 11 can be clamped between the inner edges of the surfaces of the first boss 1413 and the second boss 1414. Both sides of each electrode plate 14 of the electrolytic cell 1 (the left and right sides of the electrode plate 14) form a cavity with the corresponding diaphragm 11, so that each electrode plate 14 of the electrolytic cell 1 is in contact with the other electrode plates 14 ( Figure 4 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.

[0052] Specifically, if Figure 4-Figure 9As shown, diaphragm 11 is located between first electrode plate 14a and second electrode plate 14b, and forms a first chamber 191 with first groove 1421 on the right side of first electrode plate 14a, and a second chamber 192 with second groove 1422 on the left side of second electrode plate 14b. Another diaphragm 11 is located between the left side of first electrode plate 14a and another electrode plate (not shown) located to the left of first electrode plate 14a, and forms a second chamber 192 with second groove 1422 on the left side of first electrode plate 14a, and a first chamber with first groove 1422 on the right side of the other electrode plate (not shown) located to the left of 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 second electrode plate 14b in the same manner, and will not be further described here.

[0053] Furthermore, if Figure 6-Figure 9 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 1431 may be formed on the first boss 1413. The second liquid inlet 1432 may be formed on the second boss 1414. The first gas outlet 1441 may be formed on a side of the first boss 1413 radially opposite to the first liquid inlet hole 1431. The second gas outlet 1442 may be formed on a side of the second boss 1414 radially opposite to the second liquid inlet hole 1432. The first liquid inlet 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 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 .

[0054] 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 .

[0055] During the development of the present disclosure, the inventors discovered that due to the poor sealing performance of the junction between the two electrode plates, gas easily leaks at the junction, which can easily lead to mixing of the gases flowing out of the first gas outlet 1441 and the second gas outlet 1442, that is, hydrogen and oxygen. Therefore, the present disclosure provides a plate that can effectively prevent the mixing of hydrogen and oxygen.

[0056] In an exemplary embodiment, Figure 2-Figure 3 As shown, each electrode plate 14 may be provided with a plurality of waistlines 147. Each waistline 147 may be formed on the first boss 1413 or the second boss 1414, for example, recessed downward from the surface of the first boss 1413 or the second boss 1414, and respectively arranged outside the first air outlet 1441 and the second air outlet 1442. Furthermore, 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 a ring-shaped closed loop recessed downward from the surface of the boss 141 but not axially passing through the electrode plate 14. In addition, as shown in FIG. Figure 3 As shown, the waistline 147 also does not pass through the through hole 145 in the axial direction.

[0057] Furthermore, if Figure 2-Figure 5 As shown, the plate 14 (as Figure 4 The first electrode plate 14a) can be connected to the other electrode plate 14 (such as Figure 4The insulating gasket 19 is hermetically sealed against the second electrode plate 14b. Because the insulating gasket 19 is elastic and deformable, it can be tightly fitted to 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 forming a closed area with the insulating gasket to prevent gas from flowing out. The peripheries of the first and second gas outlet holes 1441, 1442 are respectively sealed within the closed area, thereby preventing gas from flowing out of the closed area. The closed area can be represented as the area of ​​the boss 141 enclosed by the multiple waistlines 147.

[0058] According to the embodiment of the present disclosure, by setting a plurality of waistlines 147, during the process of integrating the electrolytic cell, that is, when the electrode plate 14 is sealed and combined with the insulating gasket 19, 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 forming a closed area for preventing gas from flowing out with the insulating gasket 19, so that the periphery of the first gas outlet 1441 and the second gas outlet 1442 are respectively sealed in the closed area to prevent gas from flowing out of the closed area, thereby effectively avoiding the mixing of hydrogen and oxygen.

[0059] In an exemplary embodiment, the waistline 147 can be disposed outside the first liquid inlet 1431 and the second liquid inlet 1432. Due to the elasticity of the insulating gasket 19, the portion of the insulating gasket 19 covering the waistline 147 is squeezed into the waistline 147, thereby forming a closed area with the insulating gasket 19 to prevent the outflow of the electrolyte. The periphery of the first liquid inlet 1431 and the second liquid inlet 1432 are respectively sealed in the closed area to prevent the electrolyte from flowing out of the closed area, thereby effectively preventing the electrolyte from leaking.

[0060] Furthermore, in an exemplary embodiment, a guide groove (not shown) may be formed on the end plate 2 of the electrolytic cell. The guide groove may be formed by being recessed downward from the inner surface of the end plate 2 (the surface facing the electrolytic cell 1). 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 liquid inlet channel with the main liquid inlet 1433 of the adjacent electrode plate. The main liquid inlet 1433 may include the first liquid inlet 1431 and the second liquid inlet 1432 described above. The main liquid inlet 1433 may not be directly connected to the through hole 145, but may be connected to the through hole 145 via the sub-liquid inlet 1434.

[0061] 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.

[0062] Furthermore, the sub-liquid inlet 1434 may be provided with a through hole 145 connected to the groove 142. The sub-liquid inlet 1434 may be provided close to the main liquid inlet 1433. The sub-liquid inlet 1434 may form a sub-liquid inlet channel with the sub-liquid inlet 1434 of the adjacent electrode plate. The sub-liquid inlet channel may be connected to the main liquid inlet channel through the guide groove. The electrolyte may enter the electrolytic cell from the main liquid inlet channel, and flow into the sub-liquid inlet channel from the guide groove at the end plate 2 of the electrolytic cell, thereby entering the sub-liquid inlet 1434 of each electrode plate 4. Furthermore, the insulating gasket 19 may be made of an elastic material such as rubber or silicone. Figure 2-Figure 3 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.

[0063] Furthermore, during the electrolysis reaction, the insulating gasket 19 is easily deformed due to the influence of environmental factors such as the temperature and external pressure of the electrolysis unit 1. By setting the insulating gasket 19 to be made of elastic materials such as rubber or silicone, the insulating gasket 19 can be made elastic, so that it can "resist" the influence of environmental factors. When the insulating gasket 19 is deformed due to environmental factors, the insulating gasket 19 can rebound, thereby reducing the influence of environmental factors and maintaining the stability of the space between the two chambers.

[0064] In an exemplary embodiment, Figure 2-Figure 9 As shown, each plate 14 may be provided with a plurality of positioning holes 146, which are suitable for Figure 1During the installation of the plurality of plates of the plurality of electrolytic units shown, the positioning rods are passed through the positioning holes to position the plurality of plates. Each positioning hole 146 can be formed on the first boss 1413 or the second boss 1414. The through hole 145 can connect the positioning hole 146 with the first groove 1421 or the second groove 1422 to serve as a liquid inlet or gas outlet after the electrolytic cell is installed and during operation, allowing the electrolyte to enter the chamber through the positioning hole 146 or allowing the gas generated after electrolysis to flow out through the positioning hole 146. That is, as Figure 6 As shown, the positioning hole 146, the sub-liquid inlet hole 1434 and the first gas outlet hole 1441 can all be connected to the first groove 1421 through the through hole 145. In this way, by connecting the positioning hole 146 with the groove 142, it can not only play the role of positioning and installation, but also increase the flow path of the electrolyte and / or gas, thereby improving the electrolysis efficiency and gas outlet efficiency. Specifically, during operation, the first end of the partially aligned positioning holes 146 among the multiple positioning holes 146 can be connected to the external electrolyte supply device, and the other end can be connected to the first groove 1421 or the second groove 1422 respectively to allow the electrolyte to enter the first groove 1421 or the second groove 1422 from the positioning hole 146. Furthermore, the first end of another portion of the multiple positioning holes 146 aligned with each other can be connected to the gas collection device, and the other end can be connected to the first groove 1421 or the second groove 1422 respectively to allow the gas after electrolysis to flow out of the first groove 1421 or the second groove 1422 from the positioning hole 146 to the gas collection device.

[0065] Positioning holes 146 can be provided near the main liquid inlet hole 1433. For example, positioning holes 146 can be provided near the first gas outlet hole 1441, the second gas outlet hole 1442, the first liquid inlet hole 1431, and the second liquid inlet hole 1432. Positioning holes 146 can form a positioning liquid inlet channel or a positioning gas outlet channel with positioning holes 146 of adjacent plates. The positioning liquid inlet channel can be arranged radially opposite to the positioning gas outlet channel. The electrolyte can enter the groove 142 through the positioning liquid inlet channel. The gas generated after electrolysis can flow out of the groove 142 through the positioning gas outlet channel.

[0066] 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 into the positioning liquid inlet channel through the guide groove. Figure 6-Figure 7 As shown, the waistline 147 on the same side of the electrode plate 14 can respectively enclose the liquid inlet 143 and the gas outlet 144 connected to the groove 142 to form a closed area. Figure 6As 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 7 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.

[0067] 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.

[0068] Specifically, if Figure 6 As shown, four sets of waist lines 147 can be set on the front of the plate 14, located Figure 6 The waistline 147 on the upper left of the middle is arranged at the periphery of the first liquid inlet 1431, the positioning hole 146 and the sub-liquid inlet 1434 to form a closed area. Each set of waistlines 147 can be provided with multiple waistlines 147. Figure 6 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. Figure 6 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 6 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.

[0069] like Figure 7 As shown, four sets of waist lines 147 can also be provided on the back of the plate 14, located Figure 7 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 7 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 7 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 7The 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.

[0070] In an exemplary embodiment, Figure 2-Figure 9 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.

[0071] In an exemplary embodiment, a plurality of closed first water lines 1411 surrounding the groove 142 may be formed on the surface of the boss 141 near the groove 142 (i.e., the inner edge of the boss 141). Each first water line 1411 may be recessed downward from the surface of the boss 141. The edge of the diaphragm 11 of the electrolytic cell may be directly sealedly coupled to the plurality of first water lines 1411, thereby forming a chamber for electrolyzing the electrolyte with the groove 142.

[0072] 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.

[0073] like Figure 2-Figure 8 As shown in an exemplary embodiment, a plurality of closed second waterlines 1412 may be formed on the surface of the first boss 1413 away from the first groove 1421 (i.e., the outer edge of the surface of the first boss 1413). Each second waterline 1412 may be formed by being recessed downward from the surface of the first boss 1413. Figure 5 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 5 The right side of the middle diaphragm 11 is suitable for connecting with other plates 14 (such as Figure 5 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 Figure 6-Figure 9 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 first boss 1413 , that is, the first waterline 1411 and the second waterline 1412 are provided separately on the surface of the first boss 1413 .

[0074] 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.

[0075] In detail, such as Figure 4-Figure 5 As shown, in an exemplary embodiment, the first water line 1411 can be formed between the membrane 11 (such as Figure 4 and Figure 5The 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.

[0076] In detail, one side of the insulating spacer 19 ( Figure 4 The left side of the insulating gasket 19 on the right side of the middle) and the outer edge of the diaphragm 11 (the part combined on the first waterline 1411) and a plate 14 ( Figure 4 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 4 the right side of the insulating gasket 19 on the right side) and the other plate 14 ( Figure 4 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.

[0077] like Figure 4-Figure 9 As shown, in an exemplary embodiment, another diaphragm 11 (such as Figure 5 The diaphragm 11 on the left side can be separated by another insulating spacer 19 (such as Figure 5 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 5The right side of the insulating gasket 19 can be directly sealed and combined with the second boss 1414. Figure 5 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 5 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.

[0078] In an exemplary embodiment, a recessed machining groove may be formed at the bottom of the groove 142 near the inner sidewall of the boss 141. Each through hole 145 may extend into the machining groove. By providing the machining groove, a machining space is provided for machining the through hole 145, so that the through hole 145 can be machined without damaging the surface of the boss 141. Furthermore, since the through hole 145 can be machined with a small height difference between the boss 141 and the groove 142, 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.

[0079] In an exemplary embodiment, Figure 8 and Figure 10 As shown, the processing groove may include a plurality of spaced-apart cutouts 148. If the height difference between the groove 142 and the boss 141 is small, making it impossible to machine a through hole 145 of a predetermined size, 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 148 and the through hole 145 can be formed simultaneously during the drilling process, and the cutouts 148 and the through hole 145 can be integral. That is, by forming the cutouts 148 in the groove 142, space is provided for machining the through hole 145. Thus, the through hole 145 of a predetermined size can 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 sufficient connectivity to guide the flow of electrolyte or gas. Furthermore, a hole can also 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 plate of groove 142 does not block through-hole 145, allowing the electrolyte or gas to flow in and out smoothly. The bottom plate of groove 142 not blocking through-hole 145 can be understood as the bottom surface of the machined groove is not higher than the lower surface of through-hole 145, thereby fully exposing through-hole 145.

[0080] In an exemplary embodiment, Figure 9 and Figure 11 As shown, the processing groove may include a plurality of relief grooves 149. Each relief groove 149 may be close to the liquid inlet 143 or the gas outlet 144. A plurality of through holes 145 may extend to a relief groove 149. Furthermore, the relief groove 149 may be obtained by processing before punching, that is, the relief groove 149 is processed first and then the holes are punched. The relief groove 149 may also be obtained by processing after punching. By providing the relief groove 149, 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 148 in the groove 142, space is provided for processing the through hole 145. Thus, the through hole 145 can be fully exposed without changing the thickness of the bottom plate of the groove 142. This can ensure that the bottom plate has a thinner thickness, thereby reducing the volume of the electrolytic unit 1, and can also ensure that the through hole 145 has the connectivity to guide the electrolyte or gas to flow fully.

[0081] In an exemplary embodiment, Figure 7 As 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.

[0082] In an exemplary embodiment, Figure 2-Figure 3 and Figure 6 As shown, the support portion 15 is located on the side of the electrode plate 14 facing the diaphragm 11, that is, the support portion 15 is arranged between the electrode plate 14 and the diaphragm 11. The support portion 15 is provided with a flow channel to guide the electrolyte to disperse and flow within the chamber. The two support portions 15 have different elasticities.

[0083] In an exemplary embodiment, Figure 2-Figure 3 and Figure 6 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 each 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 dispersed more evenly in the chamber, thereby improving the electrolysis efficiency.

[0084] 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 two support portions 15 with different elasticity can be formed of materials with different elasticity, or can adopt 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.

[0085] In an exemplary embodiment, Figure 2-Figure 3 and Figure 6 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 .

[0086] For example, the flow channel is provided on the first surface 151 of the support portion 15, and the first surface 151 is divided 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 separator 11, reducing stress concentration and minimizing damage to the cathode layer 16, the anode layer 17, and the separator 11.

[0087] 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.

[0088] 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.

[0089] Figure 10 A partial view of a mesh support portion according to an embodiment of the present disclosure is schematically shown. Figure 11 A partial diagram of a grid cell according to an embodiment of the present disclosure is schematically shown. Figure 12 A partial side view of a mesh support portion according to an embodiment of the present disclosure is schematically shown.

[0090] In an exemplary embodiment, Figure 2-Figure 3 、 Figure 4 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 10-12 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 .

[0091] Specifically, if Figure 2-Figure 3 、 Figure 4 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.

[0092] like Figure 2-Figure 3 、 Figure 4 、 Figure 10 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.

[0093] In an exemplary embodiment, Figure 10-12 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 10 and Figure 11 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 11 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 11 bottom surface in the middle).

[0094] In an exemplary embodiment, Figure 13 and Figure 12 As shown, the first end of each connecting rod 1543 is located on the first surface 151 ( Figure 12 The second end of each connecting rod 1543 is located on the second surface 152 ( Figure 12The 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.

[0095] Figure 13 A partial view of a mesh support portion according to another embodiment of the present disclosure is schematically shown. Figure 14 A partial diagram of a grid cell according to another embodiment of the present disclosure is schematically shown.

[0096] In another exemplary embodiment, Figure 13 and Figure 14 As shown, the grid unit 1542 includes four connecting rods 1543. The first end ( Figure 13 The lower end of the grid) is located at the first contact surface 1544 ( Figure 14 On the top surface of the grid monomer 1542, the second end ( Figure 13 The upper end of the grid) is located at the second contact surface 1545 ( Figure 14 on the bottom surface of the ).

[0097] Figure 15 A partial side view of a mesh support portion according to another embodiment of the present disclosure is schematically shown.

[0098] In an exemplary embodiment, Figure 13 and Figure 15 As shown, the first end of each grid monomer 1542 ( Figure 15 The right end of the middle grid unit 1542 is located on the first surface 151 ( Figure 15 The upper surface in the middle), the second end of each grid monomer 1542 ( Figure 15 The left end of the middle grid unit 1542 is located on the second surface 152 ( Figure 15 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.

[0099] 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.

[0100] In an exemplary embodiment, Figure 1As 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.

[0101] In an exemplary embodiment, Figure 1 As 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.

[0102] In an exemplary embodiment, Figure 1-Figure 7 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.

[0103] Specifically, if Figure 2-6 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.

[0104] Furthermore, if Figure 2-Figure 7 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.

[0105] 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.

[0106] In an exemplary embodiment, Figures 1-6 As shown, the chamber of each electrolysis unit 1 includes a first chamber 191 ( Figure 4 The chamber on the left side of the diaphragm 11) and the second chamber 192 ( Figure 4 In 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.

[0107] 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.

[0108] In an exemplary embodiment, Figures 1-4 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.

[0109] 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.

[0110] 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: first boss; a second boss, disposed opposite to the first boss; a first groove, surrounded by the first boss, for forming a first chamber for electrolyzing the electrolyte together with the diaphragm of the electrolytic cell; a second groove, surrounded by the second boss, for forming a second chamber for electrolyzing the electrolyte together with another diaphragm of the electrolytic cell; a first air outlet, formed on the first boss and communicating with the first groove; a second air outlet hole formed on the second boss and close to the first air outlet hole, the second air outlet hole being in communication with the second groove; and There are multiple waistlines, some of which are arranged outside the first air outlet, and other parts of which are arranged outside the second air outlet and are recessed downward from the surface of the first boss or the second boss. When the electrode plate is sealed with the insulating gasket, the waistline is used to allow the portion of the insulating gasket covering the waistline to be squeezed into the waistline, so as to form a closed area with the insulating gasket for preventing gas from flowing out.

2. The electrode plate according to claim 1, characterized in that Also includes: A plurality of liquid inlet holes are formed on the first boss or the second boss and communicate with the first groove or the second groove to allow the electrolyte to enter the first chamber or the second chamber.

3. The electrode plate according to claim 2, 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 to allow the electrolyte to enter the first chamber through the first liquid inlet hole; and A second liquid inlet hole is communicated with the second groove to allow the electrolyte to enter the second chamber through the second liquid inlet hole.

4. The electrode plate according to claim 2, characterized in that: A guide groove is formed on the end plate of the electrolytic cell, and the guide groove is recessed downward from the inner surface of the end plate. The liquid inlet hole includes: a total liquid inlet hole, wherein the total liquid inlet hole is configured to form a total liquid inlet channel with the total liquid inlet holes of the adjacent electrode plates; and A sub-liquid inlet hole is connected to the first groove or the second groove, and the sub-liquid inlet hole is configured to form a sub-liquid inlet channel with the sub-liquid inlet hole of the adjacent electrode plate. The sub-liquid inlet channel is connected to the main liquid inlet channel through the guide groove, and the electrolyte flows into the sub-liquid inlet hole through the guide groove.

5. The electrode plate according to claim 4, characterized in that: It also includes a plurality of positioning holes, each of which is formed on the first boss or the second boss, connected to the first groove or the second groove and close to the liquid inlet hole, the first air outlet hole or the second air outlet hole, and the positioning hole is configured to form a positioning liquid inlet channel with the positioning hole of the adjacent plate, and the guide groove connects the positioning liquid inlet channel with the total liquid inlet channel to allow the electrolyte to flow from the guide groove into the positioning hole.

6. The electrode plate according to claim 5, characterized in that: The device further comprises a plurality of through holes, each of which extends from the liquid inlet hole, the positioning hole, the first air outlet hole, or the second air outlet hole to the first groove or the second groove, so as to allow the electrolyte to enter the first chamber and / or the second chamber through the liquid inlet hole and / or the positioning hole; And the gas formed after electrolysis is allowed to flow out from the first chamber to the first gas outlet and / or the positioning hole, and to flow out from the second chamber to the second gas outlet and / or the positioning hole.

7. The electrode plate according to claim 1, characterized in that: A plurality of closed first waterlines surrounding the first groove are formed on the surface of the first boss adjacent to the first groove, and each of the first waterlines is recessed downward from the surface of the boss. The edge of the diaphragm is directly sealed and combined with the plurality of first waterlines, and forms the first chamber with the first groove.

8. The electrode plate according to claim 7, characterized in that: A plurality of closed second waterlines are formed on the surface of the first boss away from the first groove. The second waterlines and the other side of the diaphragm opposite to the first waterlines are suitable for sealing and combining with other plates through the insulating gasket.

9. The electrode plate according to claim 8, characterized in that: The other diaphragm is sealed and bonded to the surface of the second boss through another insulating gasket, a plurality of third waterlines are formed on the surface of the second boss close to the second groove, and a plurality of closed second waterlines are formed on the surface of the second boss away from the second groove.

10. An electrolysis unit, characterized in that include: At least two plates according to any one of claims 1 to 9; 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.

11. An electrolytic cell, characterized in that: include: A plurality of electrolytic units according to claim 10, 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.

Images