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

Abstract

The invention provides a polar plate suitable for an electrolytic bath, an electrolytic unit and the electrolytic bath, the polar plate comprises a plate body, the plate body comprises a groove, a liquid inlet hole and a gas outlet hole, the groove and a diaphragm of the electrolytic bath form a cavity for accommodating electrolyte, the liquid inlet hole allows the electrolyte to enter the cavity, and the gas outlet hole allows gas formed after the electrolyte is electrolyzed to be discharged from the cavity; the plurality of caulking grooves are sunken downwards from the surface of the plate body and are used for communicating the liquid inlet hole or the air outlet hole with the groove; the plurality of pressing sheets are respectively matched with the plurality of caulking grooves in shape and are respectively combined in the plurality of caulking grooves in a sealing manner, each pressing sheet comprises a plurality of first grooves formed in the first surface, the plurality of first grooves are matched with one caulking groove to form a plurality of through holes, and each through hole is used for communicating the groove with the liquid inlet hole or the air outlet hole; a plurality of first sub-waterlines are formed on a second surface opposite to the first surface, a plurality of second sub-waterlines are formed on the plate body, and the first sub-waterlines are connected with the second sub-waterlines respectively to form a plurality of first waterlines surrounding the groove.

Description

Technical Field

[0001] At least one embodiment of this disclosure relates to the field of electrolysis technology, and more particularly to an electrode plate, an electrolysis unit, and an electrolysis cell suitable for use in an electrolytic cell. Background Technology

[0002] An electrolyzer is a device that converts electrical energy into chemical energy through an electrolysis process. It allows the electrolyte to undergo a redox reaction under the influence of direct current. Electrolyzers suitable for producing hydrogen by electrolyzing water typically inject water or an alkaline aqueous solution into the cell chamber, causing water molecules to dissociate and generate oxygen and hydrogen under the influence of direct current.

[0003] In related technologies, during the processing of electrode plates in an electrolytic cell, it is usually necessary to drill holes in the middle of the electrode plate in the thickness direction to form a channel for the electrolyte to flow into the electrolytic cell. This process is difficult and complex. 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 use in electrolytic cells, which at least partially solves the above-mentioned technical problems, reduces the processing difficulty, improves the processing accuracy, and ensures the sealing performance of the electrolytic cell.

[0005] A first aspect of this disclosure provides an electrode plate suitable for an electrolytic cell, comprising: a plate body including a groove, an inlet hole, and an outlet hole, the groove being adapted to form a chamber for containing electrolyte with a diaphragm of the electrolytic cell, the inlet hole allowing the electrolyte to enter the chamber, and the outlet hole allowing gas formed after electrolysis of the electrolyte to exit from the chamber; a plurality of recesses, each recess being recessed downward from the surface of the plate body and communicating the inlet hole or the outlet hole with the groove; and a plurality of pressure plates, the plurality of pressure plates respectively matching the shape of the plurality of recesses and respectively sealing the plates. Each of the plurality of inserts comprises: a first surface having a plurality of first grooves formed thereon, the plurality of first grooves and an insert that is sealed to the insert to form a plurality of through holes, each of the through holes being used to connect the groove to the liquid inlet or the air outlet; and a second surface disposed opposite to the first surface having a plurality of first sub-water lines formed thereon, and a plurality of second sub-water lines formed on the plate body, the plurality of first sub-water lines being respectively connected to the plurality of second sub-water lines to form a plurality of first water lines surrounding the groove.

[0006] According to an embodiment of this disclosure, the groove and the position opposite to the plurality of first grooves respectively form a second groove, and in a pair of grooves and the pressure plate that are sealed together, the first groove and the second groove form the through hole.

[0007] According to an embodiment of this disclosure, in a direction perpendicular to the through hole, the cross-section of the end of the first groove away from the second groove is arched.

[0008] According to an embodiment of this disclosure, the plate body includes: an annular boss, the liquid inlet hole, the air outlet hole and the groove are formed on the boss, and the boss surrounds the groove.

[0009] According to an embodiment of this disclosure, the liquid inlet and the air outlet are arranged opposite to each other in the radial direction of the boss.

[0010] According to an embodiment of the present disclosure, the boss includes a first boss and a second boss disposed on opposite sides of the plate body, the groove includes a first groove surrounded by the first boss and a second groove surrounded by the second boss, the first boss is adapted to directly seal with the diaphragm, and the first water line is formed on the surface of the first boss near the first groove.

[0011] According to an embodiment of this disclosure, the liquid inlet includes: a first liquid inlet, which communicates with the first groove based on the through hole, to allow the electrolyte to enter the first chamber formed by the first groove through the first liquid inlet when forming an electrolytic cell; and a second liquid inlet, which communicates with the second groove based on the through hole, to allow the electrolyte to enter the second chamber formed by the second groove through the second liquid inlet when forming an electrolytic cell.

[0012] According to an embodiment of this disclosure, the vent includes: a first vent, which communicates with the first groove via the through hole to allow gas formed after electrolysis to flow from the first chamber to the first vent; and a second vent, which communicates with the second groove via the through hole to allow gas formed after electrolysis to flow from the second chamber to the second vent.

[0013] According to an embodiment of this disclosure, the first liquid inlet hole is provided in multiple ways to form a first liquid inlet hole group, and the second liquid inlet hole is provided in multiple ways to form a second liquid inlet hole group. The first liquid inlet hole group and the second liquid inlet hole group are arranged adjacent to each other in the first region of the boss. The first vent hole is provided in multiple ways to form a first vent hole group, and the second vent hole is provided in multiple ways to form a second vent hole group. The first vent hole group and the second vent hole group are located in a second region of the boss opposite to the first region, and the multiple first vent holes and the multiple second vent holes are alternately arranged.

[0014] According to an embodiment of the present disclosure, the electrode plate further includes: a first total liquid inlet hole disposed on the boss and configured to form a first total liquid inlet channel with the first total liquid inlet hole of the adjacent plate body; and a second total liquid inlet hole disposed on the boss and configured to form a second total liquid inlet channel with the first total liquid inlet hole of the adjacent plate body.

[0015] According to embodiments of this disclosure, the electrode plate further includes a positioning hole disposed on the boss, configured to allow a positioning rod to pass through.

[0016] According to an embodiment of the present disclosure, a plurality of closed second water lines are formed on the surface of the first boss away from the first groove, the second water lines being adapted to be sealed together with other plates by means of an insulating gasket.

[0017] According to an embodiment of the present disclosure, the second boss is adapted to be sealed to the diaphragm by the insulating gasket, and a plurality of third sub-water lines are formed on the surface of the second boss near the second groove, and a plurality of fourth sub-water lines are formed on the second surface of the pressure plate sealed to the groove of the second boss, the third sub-water lines and the fourth sub-water lines constituting a closed plurality of third water lines surrounding the second groove.

[0018] A second aspect of this disclosure provides an electrolysis unit comprising: at least two electrode plates as described above; a diaphragm disposed between two adjacent electrode plates to form a first chamber and a second chamber respectively with grooves in the two adjacent electrode plates; a cathode layer located in one of the first chamber and the second chamber, such that the electrolyte reacts to produce hydrogen gas; and an anode layer located in the other of the first chamber and the second chamber, and located on the side of the diaphragm opposite to the cathode layer, such that the electrolyte reacts to produce oxygen gas.

[0019] A third aspect of this disclosure provides an electrolytic cell comprising: a plurality of electrolytic units as described above, wherein the plurality of electrolytic units are stacked sequentially to form a stacked structure; two end plates, respectively located at both ends of the stacked structure; and a mounting assembly adapted to fix the stacked structure to the two end plates.

[0020] According to embodiments of this disclosure, during the installation of the tablet into the groove, the first surface of the tablet contacts and seals with the groove. Multiple first grooves form multiple through holes extending from the liquid inlet or vent to the groove, guiding the electrolyte into the chamber from the liquid inlet and guiding the gas formed after electrolysis out of the chamber through the vent during the formation of the electrolytic cell. During the tablet pressing process, the first grooves are machined on the first surface of the tablet. This transforms the traditional, complex three-dimensional machining process on an integrated workpiece into a standardized, batch-processed precision machining of a two-dimensional surface (i.e., the first surface of the tablet). There is no issue of surface obstruction, effectively reducing the machining difficulty of the first grooves and improving machining accuracy. Because the shapes of the tablet and the groove match, each tablet can fill the space in each groove except for the formed through holes, thereby improving the sealing performance of the electrolytic cell. Furthermore, the first water line surrounding the groove, formed by the first sub-water line on the second surface of the tablet and the second sub-water line on the plate, can seal with the diaphragm of the electrolytic cell, ensuring the sealing performance of the electrolytic cell chamber. Attached Figure Description

[0021] The above and other objects, features and advantages of this disclosure will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0022] Figure 1 A perspective view of an electrolytic cell according to an embodiment of the present disclosure is shown schematically;

[0023] Figure 2 An exploded view of the electrolysis unit of an electrolyzer according to an embodiment of the present disclosure is shown schematically.

[0024] Figure 3 A perspective view of an electrode plate according to an embodiment of the present disclosure is shown schematically;

[0025] Figure 4 A partial view of an electrode plate according to an embodiment of the present disclosure is shown schematically;

[0026] Figure 5 A schematic diagram illustrating the installation of the tablet and plate according to an embodiment of the present disclosure is shown.

[0027] Figure 6 A perspective view of a tablet compression device according to an embodiment of the present disclosure is shown schematically.

[0028] Figure 7 A perspective view of a plate body according to an embodiment of the present disclosure is shown schematically;

[0029] Figure 8 A schematic cross-sectional view of an electrolysis unit according to an embodiment of the present disclosure is shown;

[0030] Figure 9 Schematic illustration Figure 8 An exploded view, in which the support portion is not shown;

[0031] Figure 10 A schematic cross-sectional view of an electrolysis unit according to another embodiment of the present disclosure is shown;

[0032] Figure 11 Schematic illustration Figure 10 An exploded view, in which the support portion is not shown;

[0033] Figure 12 A schematic side view of the front of an electrode plate according to an embodiment of the present disclosure is shown;

[0034] Figure 13 Schematic illustration Figure 12 The side view of the back of the electrode plate shown.

[0035] Figure Labels

[0036] 1. Plate body; 11. Boss; 111. Liquid inlet hole; 1111. First liquid inlet hole group; 11111. First liquid inlet hole; 1112. Second liquid inlet hole group; 11121. Second liquid inlet hole; 112. Vent hole; 1121. First vent hole; 1122. Second vent hole; 113. Groove; 1131. Second groove; 115. First boss; 1151. Second sub-water line; 116. Second boss; 1161. Third sub-water line; 117. First main liquid inlet hole; 1171. First main liquid inlet channel; 118. Second main liquid inlet hole; 1181. Second main liquid inlet channel; 119. Positioning hole; 12. Groove; 121. First groove; 122. Second groove; 13. First water line; 14. Second water line; 15. Third water line; 2 1. Tableting; 21. First surface; 211. First groove; 212. Through hole; 22. Second surface; 221. First sub-water line; 222. Fourth sub-water line; 3. Electrolysis unit; 31. Diaphragm; 32. First support assembly; 33. Second support assembly; 34. Electrode plate; 34a. First electrode plate; 34b. Second electrode plate; 351. First chamber; 352. Second chamber; 36. Support part; 361. First surface; 362. Second surface; 37. Cathode layer; 38. Anode layer; 39. Nickel foam layer; 391. Insulating gasket; 392. Relief hole; 4. End plate; 5. Mounting assembly; 6. First liquid inlet channel; 7. Second liquid inlet channel; 8. First gas outlet channel; 9. Second gas outlet channel; S1. First region; S2. Second region. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0038] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0039] 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 are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0040] It should also be noted that the directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," and "right," are only for reference to the directions in the accompanying drawings and are not intended to limit the scope of protection of this disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted where they may cause confusion in understanding this disclosure.

[0041] Figure 1 A perspective view of an electrolytic cell according to an embodiment of the present disclosure is shown schematically.

[0042] Embodiments of this disclosure provide an electrolyzer. This electrolyzer can be used to produce hydrogen through the electrolysis of water. For example... Figure 1 As shown, the electrolytic cell may include multiple electrolytic units 3, two end plates 4, and a mounting assembly 5. The multiple electrolytic units 3 can be stacked sequentially to form a stacked structure. The two end plates 4 can be located at opposite ends of the stacked structure. The mounting assembly 5 can be used to fix the stacked structure to the two end plates 4.

[0043] Figure 2 An exploded view of the electrolysis unit of an electrolyzer according to an embodiment of the present disclosure is shown schematically. Figure 3 A perspective view of an electrode plate according to an embodiment of the present disclosure is shown schematically.

[0044] Embodiments of this disclosure provide an electrolysis unit 3 for an electrolytic cell. For example... Figures 2-3 As shown, the electrolysis unit 3 may include a diaphragm 31, two sets of support assemblies (a first support assembly 32 and a second support assembly 33), an insulating gasket 391, a cathode layer 37, and an anode layer 38. The diaphragm 31 can be sealed between the two sets of support assemblies via the insulating gasket 391 to form two chambers suitable for containing the electrolyte. The cathode layer 37 may be located in one of the two chambers, allowing the electrolyte to react and produce hydrogen gas. The anode layer 38 may be located in the other of the two chambers, allowing the electrolyte to react and produce oxygen gas.

[0045] It should be noted that in the process of hydrogen production by water electrolysis, the diaphragm 31 allows ions to pass through while blocking electrons. For example, in anion exchange membrane water electrolysis for hydrogen production, the ions are generally hydroxide ions. In proton exchange membrane water electrolysis for hydrogen production, the ions are generally hydrogen ions. In this way, ions can move from the anode to the cathode under the influence of the electric field, completing the circuit closure while maintaining the charge balance between the two electrodes. In this embodiment, the electrolysis unit 3 can be an anion exchange membrane (AEM) for hydrogen production by anion electrolysis, and the diaphragm 31 can be an anion exchange membrane. The electrolyte can be water or an alkaline aqueous solution. The cathode layer 37 and the anode layer 38 can be made of corrosion-resistant metal materials to simultaneously possess mechanical strength and conductivity. Materials such as platinum (Pt), palladium (Pd), nickel (Ni), or cobalt (Co) can be used as catalyst materials for the cathode layer 37. 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 38. Understandably, where theoretical and practical conditions permit, electrolysis unit 3 can also be used for alkaline water electrolysis to produce hydrogen.

[0046] In detail, the two sets of support components may include a first support component 32 (the lower side of the diaphragm 31 in the figure) and a second support component 33 (the upper side of the diaphragm 31 in the figure) disposed opposite each other, and the diaphragm 31 is clamped between the first support component 32 and the second support component 33 based on an insulating gasket 391. The diaphragm 31 can be sealed with the first support component 32 and the second support component 33 respectively to form two chambers for containing electrolyte, such that the cathode layer 37 and the anode layer 38 are located in the two chambers respectively. Under the action of direct current, the electrolyte can be dissociated to release hydrogen and oxygen.

[0047] In one exemplary embodiment, such as Figures 2-3 As shown, each support component may include an electrode plate 34 and a support portion 36. Specifically, the electrode plate 34 may be formed into a plate-like structure. The electrode plate 34 may be a circular plate, a rectangular plate, or a polygonal plate, etc., depending on the actual needs.

[0048] To inject electrolyte into the chamber of an electrolytic cell, it is typically necessary to drill a hole in the middle of the electrode plate along its thickness to form a channel for the electrolyte to flow into the chamber. During manufacturing, the electrode plate usually needs to be fixed in place, and the through hole connecting the chamber is machined in the middle of the electrode plate along its thickness. The outer wall of the electrode plate obstructs this process, making manufacturing difficult and complex. Therefore, embodiments of this disclosure provide an electrode plate suitable for electrolytic cells.

[0049] Figure 4 A partial view of an electrode plate according to an embodiment of the present disclosure is shown schematically. Figure 5 The schematic diagram illustrates the installation of the pressing plate and plate body according to an embodiment of the present disclosure. Figure 6A perspective view of a tablet compression device according to an embodiment of the present disclosure is shown schematically.

[0050] In one exemplary embodiment, such as Figures 2-5 As shown, the electrode plate 34 includes a plate body 1, multiple grooves 113, and multiple pressure plates 2. The plate body 1 includes a groove 12, a liquid inlet hole 111, and a vent hole 112. The groove 12 is adapted to form a chamber for containing electrolyte with the diaphragm 31 of the electrolytic cell. The liquid inlet hole 111 allows electrolyte to enter the chamber. The vent hole 112 allows gas formed after the electrolyte is electrolyzed to exit from the chamber. Each groove 113 is recessed downward from the surface of the plate body 1 and communicates with either the liquid inlet hole 111 or the vent hole 112 through the groove 12.

[0051] like Figures 3-6 As shown, multiple pressure plates 2 are respectively shaped and sealed within multiple grooves 113. Each pressure plate 2 includes a first surface 21 and a second surface 22 disposed opposite to the first surface 21. Multiple first grooves 211 are formed on the first surface 21. The multiple first grooves 211 and the groove 113 sealed to the pressure plate 2 cooperate to form multiple through holes 212. Each through hole 212 is used to connect the groove 12 with a liquid inlet hole 111 or a vent hole 112. Multiple first sub-water lines 221 are formed on the second surface 22. Multiple second sub-water lines 1151 are formed on the plate body 1. The multiple first sub-water lines 221 are respectively connected to the multiple second sub-water lines 1151 to form multiple first water lines 13 surrounding the groove 12.

[0052] Figure 7 A perspective view of a plate body according to an embodiment of the present disclosure is shown schematically.

[0053] In detail, such as Figure 2 and Figure 7 As shown, the plate 1 includes an annular boss 11. The boss 11 can surround the groove 12, and the groove 12 can be recessed inward from the surface of the boss 11. The diaphragm 31 can form a cavity with the groove 12. It is understood that the boss 11 can also be rectangular or polygonal, depending on the actual needs. For convenience, the following description will take the case of a circular plate 1 with an annular boss 11 and a circular groove 12 as an example.

[0054] In one exemplary embodiment, such as Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, an inlet hole 111 can be formed on the boss 11. An outlet hole 112 can be formed on the side of the boss 11 that is radially opposite to the inlet hole 111. A plurality of grooves 113 can be formed on the boss 11. Each groove 113 can be recessed downward from the surface of the boss 11 and communicate with the groove 12, or communicate with the outlet hole 112.

[0055] Furthermore, the shape of the tablet 2 can match the shape of the groove 113. The first surface 21 of the tablet 2 ( Figure 6 The lower surface of the intermediate pressure plate 2 has multiple first grooves 211. Each first groove 211 is recessed inward from the first surface 21 of the pressure plate 2 and extends radially along the plate body 1. The multiple first grooves 211 can be spaced apart along the circumferential direction of the plate body 1. After the groove 113 is sealed with the pressure plate 2, the first surface 21 of each pressure plate 2 contacts the groove 113. In this way, the first groove 211 of each pressure plate 2 and each groove 113 form multiple through holes 212. At this time, the liquid inlet hole 111 or the vent hole 112 communicates with the groove 12 through the through holes 212. Each through hole 212 can extend from the liquid inlet hole 111 to the groove 12, or the vent hole 112 can extend to the groove 12, so as to allow the electrolyte to enter the chamber through the liquid inlet hole 111 or allow the gas formed after electrolysis to flow from the chamber to the vent hole 112. The pressure plate 2 can be installed in the groove 113 by welding, pressing, bonding or other methods.

[0056] According to embodiments of this disclosure, during the processing of the tablet 2, a first groove 211 is machined on the first surface 21 of the tablet 2. In this way, the traditional, highly complex three-dimensional machining method, which is completed on an integrated workpiece, is transformed into standardized, batch-processed precision machining of a two-dimensional machining surface (i.e., the first surface 21 of the tablet 2). There is no situation where the machining surface is obscured, which effectively reduces the machining difficulty of the first groove 211 and improves the machining accuracy.

[0057] Furthermore, since the shape of the pressing plate 2 matches that of the groove 113, each pressing plate 2 can fill the space in each groove 113 except for the formed through hole 212, thereby improving the sealing performance of the electrolytic cell.

[0058] like Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in one exemplary embodiment, the second surface 22 of the compression tablet 2, which is opposite to the first surface 21, is... Figure 6Multiple first sub-water lines 221 can be formed on the upper surface of the intermediate pressure plate 2. Multiple second sub-water lines 1151 can be formed on the surface of the boss 11 near the groove 12. The multiple first sub-water lines 221 and the multiple second sub-water lines 1151 can form a closed multiple first water lines 13 surrounding the groove 12. For example, the three first sub-water lines 221 on the surface of the pressure plate 2 and the three second sub-water lines 1151 on the boss 11 form a closed three first water lines 13. Each first sub-water line 221 can be recessed downward from the surface of the pressure plate 2. Each second sub-water line 1151 can be recessed downward from the surface of the boss 11.

[0059] The edge of the diaphragm 31 of the electrolytic cell can be directly sealed with multiple first water lines 13 to form a chamber with the groove 12. By setting a pressure plate 2 that matches the shape of the groove 113, the first sub-water line 221 of the second surface 22 of the pressure plate 2 and the second sub-water line 1151 of the plate 1 form a closed first water line 13 surrounding the groove 12. When the diaphragm 31 is directly sealed with the first water line 13, the electrode plate 34 used to squeeze the diaphragm 31 will not exert a cutting force on the diaphragm 31 due to the discontinuity of the first water line 13, thereby avoiding diaphragm 31 rupture, reducing the failure rate and maintenance cost of the electrolytic cell, and ensuring the sealing of the chamber of the electrolytic cell. Here, "closed" means that each first water line 13 forms an independent annular closed loop. This also applies to the second water line 14 and the third water line 15 described below.

[0060] In one exemplary embodiment, such as Figure 4 and Figure 5 As shown, the positions of the groove 113 and the multiple first grooves 211 respectively form the second grooves 1131. In the sealed combination of a pair of grooves 113 and the pressure plate 2, the first grooves 211 and the second grooves 1131 form a through hole 212.

[0061] In detail, a first rib is formed between adjacent first grooves 211. A second rib is formed between adjacent second grooves 1131 of the groove 113, opposite to the first rib. After the groove 113 is sealed with the pressure plate 2, the first rib and the second rib are positioned opposite each other, and the first groove 211 and the second groove 1131 form a through hole 212.

[0062] In this way, when the through hole 212 meets the preset hole diameter, the way in which the first groove 211 and the second groove 1131 together form the through hole 212 can reduce the depth of the first groove 211 and improve the rigidity of the tablet 2.

[0063] Furthermore, the second rib fits snugly against the first rib, serving as a positioning guide. An adhesive can be applied between the first and second ribs to improve the stability of the mounting of the pressure plate 2 and the plate 1 in the groove 113.

[0064] In one exemplary embodiment, such as Figure 4 , Figure 5 and Figure 6 As shown, in the direction perpendicular to the through hole 212, the cross-section of the end of the first groove 211 away from the second groove 1131 is arched.

[0065] In this implementation, the first groove 211 adopts an arched structure, which can further improve the rigidity of the pressing tablet 2 and reduce the probability of the pressing tablet 2 being deformed by external forces.

[0066] Figure 8 A cross-sectional view of an electrolysis unit according to an embodiment of the present disclosure is shown schematically. Figure 9 Schematic illustration Figure 8 An exploded view, in which the support portion is not shown.

[0067] Furthermore, such as Figure 2 , Figure 8 and Figure 9 As shown, the insulating gasket 391 can be made of elastic materials such as rubber or silicone. The insulating gasket 391 can be annular. The annular width of the insulating gasket 391 can be the same as the annular width of the boss 11. The edge of the diaphragm 31 can be clamped between the annular boss 11 of the electrode plate 34 and the insulating gasket 391. Because the insulating gasket 391 is elastic and can undergo slight deformation, it can be squeezed into the tiny gap between the electrode plate 34 and the diaphragm 31, which can further improve the sealing of the two chambers and effectively isolate the electrolyte in the chamber from the external environment.

[0068] Furthermore, during the electrolysis reaction, the temperature of electrolysis unit 3 continuously rises, while hydrogen and oxygen are continuously generated and discharged within the chamber. Due to environmental factors such as temperature and external pressure, the insulating gasket 391 is prone to deformation. By making the insulating gasket 391 into an elastic material such as rubber or silicone, it can be made elastic, thus "resisting" the influence of environmental factors. In the event of deformation caused by environmental factors, the insulating gasket 391 can rebound, thereby reducing the impact of environmental factors and maintaining the stability of the space between the two chambers.

[0069] Figure 10 A cross-sectional view of an electrolysis unit according to another embodiment of the present disclosure is shown schematically. Figure 11 Schematic illustration Figure 10 An exploded view, in which the support portion is not shown. Figure 12 A schematic side view of the front of an electrode plate according to an embodiment of the present disclosure is shown. Figure 13 Schematic illustration Figure 12 The side view of the back of the electrode plate shown.

[0070] like Figures 2-13 As shown, in one exemplary embodiment, a plurality of closed second water lines 14 may be formed on the surface of the boss 11 away from the groove 12 (i.e., the outer edge of the surface of the boss 11). Each second water line 14 may be formed by a downward recess from the surface of the boss 11. The second water lines 14 (e.g. Figure 9 The second water line 14 on the right side of the first electrode plate 34a and the other side of the diaphragm 31 opposite to the first water line 13 (as shown in the image). Figure 9 The right side of the diaphragm 31 is suitable for use with other electrodes 34 (such as) via the insulating gasket 391. Figure 9 The second electrode plate 34b) is sealed together. Here, the diaphragm 31 does not contact the second water line 14. Since the second water line 14 is used to mate with the insulating gasket 391, the recess depth of the second water line 14 is shallow, and the distance between adjacent second water lines 14 is close. In addition, as Figure 4 , Figure 12 and Figure 13 As shown, the first water line 13 and / or the second water line 14 are not provided between the inner edge and the outer edge of the surface of the boss 11, that is, the first water line 13 and the second water line 14 are provided separately on the surface of the boss 11.

[0071] In one exemplary embodiment, a portion of the multiple first water lines 13 can be configured as dense grooves. These dense grooves can also be formed by downward indentation from the surface of the boss 11. The distance between adjacent dense grooves is less than the distance between adjacent second water lines 14. The indentation depth of the dense grooves is shallower than the indentation depth of the second water lines 14, meaning the indentation depth of the dense grooves is shallower and the distance between adjacent dense grooves is closer. This results in a smaller deformation space at the contact point between the diaphragm 31 and the electrode plate 34 when the electrode plate 34 compresses the diaphragm 31, preventing large deformation of the diaphragm 31 and further preventing diaphragm 31 rupture. For example, the distance between adjacent dense grooves can be greater than or equal to the thickness of the diaphragm 31, and less than or equal to twice the thickness of the diaphragm 31. The indentation depth of the dense grooves can be equal to one-tenth the thickness of the diaphragm 31. The thickness of the diaphragm 31 can be between 0.4 mm and 0.5 mm. The dense pattern can be the first water line 13 that is closer to the first groove 121 among multiple first water lines 13. That is, the first water line 13 that is in direct contact with the diaphragm 31 can be set as a dense pattern. The recess depth of the other first water lines 13 can also be shallower than the recess depth of the second water line 14, but deeper than the dense pattern. Furthermore, the distance between the other adjacent first water lines 13 can also be smaller than the distance between adjacent second water lines 14, but larger than the distance between adjacent dense patterns.

[0072] In one exemplary embodiment, such as Figures 3-9As shown, each electrode plate 34 may be provided with a groove 12. The central region of the side of the electrode plate 34 facing the diaphragm 31 is recessed inward relative to the boss 11 to form the groove 12. The outer periphery of the electrode plate 34 protrudes to form an annular boss 11, which surrounds the groove 12. One of the electrode plates 34 (e.g., Figure 8 The groove 12 of the first electrode plate 34a) is directly sealed to the diaphragm 31 to form a chamber. The groove 12 of the other electrode plate 34 (the second electrode plate 34b in the figure) is sealed to the diaphragm 31 through an insulating gasket 391 to form another chamber.

[0073] In one exemplary embodiment, such as Figures 3-9 As shown, in an electrolysis unit 3, the first water line 13 can be formed on an electrode 34 ( Figure 9 The first electrode plate 34a on the left side has a protrusion 11 on the surface near the groove 12 (i.e., the first water line 13 can be formed on a portion of the protrusion 11), while the other electrode plate 34 ( Figure 9 The first water line 13 may not be provided on the protrusion 11 of the second electrode plate 34b on the right side. Correspondingly, the diaphragm 31 is on one side ( Figure 9 The left side of the septum 31) and an electrode 34 ( Figure 9 The first electrode plate 34a on the left side is directly sealed together through the first water line 13, while the diaphragm 31 is on the other side ( Figure 9 The right side of the septum 31) and another electrode 34 ( Figure 9 The surface of the protrusion 11 of the second electrode plate 34b on the right side, near the groove 12, is joined by an insulating gasket 391. In other words, one side of the insulating gasket 391 ( Figure 9 The left side of the insulating pad 391) and the outer edge of the diaphragm 31 (the part that is attached to the first water line 13) and an electrode plate 34 ( Figure 9 The surface of the boss 11 of the first electrode plate 34a on the left side of the middle side is directly sealed (in direct contact) to the outer edge of the diaphragm 31, and the other side of the insulating gasket 391 ( Figure 9 The right side of the insulating pad 391) and another electrode 34 ( Figure 9 All surfaces of the boss 11 on the right side of the second electrode plate 34b are directly sealed together (in direct contact). In other words, one side of the insulating gasket 391 can be in direct contact with both the boss 11 and the diaphragm 31 at the same time, while the other side of the insulating gasket 391 can be in direct contact only with the boss 11.

[0074] In an alternative exemplary embodiment, such as Figures 10-11 As shown, each electrode plate 34 can be provided with two grooves 12. The central areas of opposite sides (the left and right sides of the electrode plate 34) are recessed inward relative to their respective bosses 11 to form grooves 12. The two opposite grooves 12 can be separated by a common bottom wall. Figure 11 As shown, the electrode plate 34 (first electrode plate 34a and second electrode plate 34b) with two grooves 12 can be called a bipolar plate 34.

[0075] The outer periphery of the opposite sides (left and right sides of the electrode 34) of the electrode 34 protrudes to form annular bosses 11. The bosses 11 can surround the grooves 12. The edge of the diaphragm 31 can be clamped between the inner edges of the surfaces of the bosses 11 of the two electrode plates 34. Both sides (left and right sides of the electrode 34) of each electrode plate 34 in the electrolysis unit 3 form a cavity with the corresponding diaphragm 31, such that each electrode plate 34 of the electrolysis unit 3 can be positioned relative to other electrode plates 34. Figure 10 The electrode plates 34 (other than the first electrode plate 34a and the second electrode plate 34b shown) form two additional electrolytic units 3. Thus, two adjacent electrolytic units 3 share one electrode plate 34.

[0076] Specifically, such as Figures 10-11 As shown, two grooves 12 can be provided on the left and right sides of the first electrode plate 34a and the second electrode plate 34b. A diaphragm 31 is located between the first electrode plate 34a and the second electrode plate 34b, forming a chamber with the groove 12 on the right side of the first electrode plate 34a and the groove 12 on the left side of the second electrode plate 34b, respectively. Another diaphragm 31 is located between the left side of the first electrode plate 34a and another electrode plate 34 (not shown in the figure) located on the left side of the first electrode plate 34a, forming a chamber with the groove 12 on the left side of the first electrode plate 34a and the groove 12 on the right side of the other electrode plate 34 located on the left side of the first electrode plate 34a, thus forming another electrolytic unit 3. The second electrode plate 34b and another electrode plate 34 (not shown in the figure) located on the right side of the second electrode plate 34b form another electrolytic unit 3 in the same way, and will not be described again here.

[0077] In detail, such as Figures 10-13 As shown, in one exemplary embodiment, the boss 11 may include a first boss 115 and a second boss 116 disposed opposite to each other. The recess 12 may include a first recess 121 and a second recess 122. The first boss 115 may surround the first recess 121. The second boss 116 may surround the second recess 122. For example, for Figure 10 For the first electrode plate 34a, the adjacent diaphragm 31 ( Figure 10 The diaphragm 31 on the right side and another diaphragm 31 ( Figure 10 The diaphragm 31 on the left side can be sealed to the first boss 115 and the second boss 116 respectively, thereby forming a first chamber 351 with the first groove 121 and a second chamber 352 with the second groove 122. The first chamber 351 and the second chamber 352 can respectively accommodate the support portion 36.

[0078] Furthermore, such as Figures 10-11As shown, in one exemplary embodiment, the first water line 13 may be formed at the junction with the diaphragm 31 (e.g., Figure 10 and Figure 11 The first protrusion 115, which is directly sealed to the diaphragm 31 on the right side, is close to the surface of the first groove 121. For example, the right side of the first electrode plate 34a can be directly sealed to the diaphragm 31. The left side of the second electrode plate 34b can be sealed to the diaphragm 31 through an insulating gasket 391. That is, an insulating gasket 391 is provided between the left side of the second electrode plate 34b and the diaphragm 31. Since the left side of the second electrode plate 34b does not directly contact the diaphragm 31, the first water line 13 does not need to be provided on the left side of the second electrode plate 34b. Other electrode plates 34 can also adopt the same arrangement.

[0079] like Figures 10-13 As shown, in one exemplary embodiment, another diaphragm 31 (such as...) Figure 11 The diaphragm 31 on the left side can be connected to another insulating pad 391 (such as...). Figure 11 The insulating gasket 391 on the left side is sealed to the surface of the second protrusion 116 of the first electrode plate 34a. Multiple third sub-water lines 1161 are formed on the surface of the second protrusion 116 near the second groove 122. Multiple fourth sub-water lines 222 are formed on the surface of another pressure plate 2 on the second protrusion 116. The third sub-water lines 1161 and fourth sub-water lines 222 constitute a closed set of multiple third water lines 15 surrounding the second groove 122. Multiple closed second water lines 14 can be formed on the surface of the second protrusion 116 away from the second groove 122 (i.e., the outer edge of the surface of the second protrusion 116). That is, the outer edges of the surfaces of both protrusions 11 can be formed with second water lines 14. The second water lines 14 can be used for sealing with the insulating gasket 391. The recess depth of the third water line 15 can be the same as the recess depth of the second water line 14. That is, the inner edges of the surfaces of both protrusions 11 can be formed with third water lines 15 and first water lines 13, respectively. The first water line 13 can be used for direct sealing with the diaphragm 31. The third water line 15 can be sealed with the diaphragm 31 through an insulating gasket 391. That is, one side of the insulating gasket 391 (e.g.) Figure 11 The right side of the insulating gasket 391 can be directly sealed to the second boss 116. The other side of the insulating gasket 391 (as...) Figure 11 The left side of the insulating gasket 391 can simultaneously seal against both the first boss 115 and the diaphragm 31. Specifically, this side of the insulating gasket 391 (e.g., the left side of the insulating gasket 391) can simultaneously seal against both the first boss 115 and the diaphragm 31. Figure 11 The outer edge of the left side surface of the insulating gasket 391 can be directly sealed to the first boss 115, and the inner edge of the same side surface of the insulating gasket 391 can be directly sealed to the diaphragm 31. That is, the inner edge of the same side surface of the insulating gasket 391 can be sealed to the first boss 115 through the diaphragm 31.

[0080] Furthermore, such as Figures 2-13 As shown, the liquid inlet 111 may include a first liquid inlet 11111 and a second liquid inlet 11121. The vent 112 may include a first vent 1121 and a second vent 1122. The first liquid inlet 11111 and the second liquid inlet 11121 may be formed on the boss 11. The first vent 1121 and the second vent 1122 may be formed on the side of the boss 11 that is radially opposite to the first liquid inlet 11111 and the second liquid inlet 11121, respectively. The first liquid inlet 11111 and the first vent 1121 may communicate with the first groove 121 through the through hole 212, respectively, to allow electrolyte to enter the first chamber 351 through the first liquid inlet 11111 and to allow hydrogen or oxygen to exit the first chamber 351 through the first vent 1121. The second liquid inlet 11121 and the second vent 1122 can be connected to the second groove 122 respectively through the through hole 212, so as to allow the electrolyte to enter the second chamber 352 through the second liquid inlet 11121 and allow oxygen or hydrogen to exit the second chamber 352 through the second vent 1122.

[0081] In one exemplary embodiment, the first liquid inlet hole 11111 can form a first liquid inlet channel 6 with the first liquid inlet hole 11111 of the adjacent electrode plate 34, allowing electrolyte to flow from the electrolyte supply device to the first chamber 351. The second liquid inlet hole 11121 can form a second liquid inlet channel 7 with the second liquid inlet hole 11121 of the adjacent electrode plate 34, allowing electrolyte to flow from the electrolyte supply device to the second chamber 352.

[0082] The first vent 1121 can form a first vent passage 8 with the first vent 1121 of the adjacent electrode 34, allowing gas discharged from the first chamber 351 to flow into the gas collecting device. The second vent 112 can form a second vent passage 9 with the second vent 112 of the adjacent electrode 34, allowing gas discharged from the second chamber 352 to flow into the gas collecting device.

[0083] Furthermore, the through hole 212 can pass through the first boss 115 to connect the first liquid inlet hole 11111 to the first groove 121, pass through the second boss 116 to connect the second liquid inlet hole 11121 to the second groove 122, pass through the first boss 115 to connect the first vent hole 112 to the first groove 121, and pass through the second boss 116 to connect the second vent hole 112 to the second groove 122, so that the electrolyte enters the first chamber 351 through the first liquid inlet hole 11111, the electrolyte enters the second chamber 352 through the second liquid inlet hole 11121, the first gas (e.g., oxygen) formed after electrolysis in the first chamber 351 flows out through the first vent hole 112, and the second gas (e.g., hydrogen) formed after electrolysis in the second chamber 352 flows out through the second vent hole 112.

[0084] In one exemplary embodiment, such as Figure 12 and Figure 13 As shown, the diameter of the plate 1 of the electrode 34 is approximately 2 meters. Multiple first liquid inlet holes 11111 are provided to form a first liquid inlet hole group 1111. Multiple second liquid inlet holes 11121 are provided to form a second liquid inlet hole group 1112. The first liquid inlet hole group 1111 and the second liquid inlet hole group 1112 are arranged adjacent to each other in the first region S1 of the boss 11.

[0085] Specifically, such as Figure 1 , Figure 12 and Figure 13 As shown, the first liquid inlet group 1111 has two first liquid inlet holes 11111, each first liquid inlet hole 11111 forming a first liquid inlet channel 6 with the first liquid inlet hole 11111 of the adjacent plate 1. The second liquid inlet group 1112 has two second liquid inlet holes 11121, each second liquid inlet hole 11121 forming a second liquid inlet channel 7 with the second liquid inlet hole 11121 of the adjacent plate 1. It can be understood that the number of first liquid inlet holes 11111 in the first liquid inlet group 1111 can be three, four, five, six, etc. The second liquid inlet group 1112 is similar, and will not be described in detail here.

[0086] like Figure 1 , Figure 12 and Figure 13 As shown, multiple first vent holes 112 are provided to form a first vent hole group. Multiple second vent holes 112 are provided to form a second vent hole group. The first vent hole group and the second vent hole group are located in the second region S2, which is radially opposite to the boss 11 and the first region S1, and multiple first vent holes 1121 and multiple second vent holes 1122 are alternately arranged.

[0087] Specifically, such as Figure 1 , Figure 12 and Figure 13 As shown, the first vent group has three first vents 1121, each forming a first venting channel 8 with the first vent 1121 of the adjacent plate 1. The second vent group has three second vents 1122, each forming a second venting channel 9 with the second vent 1122 of the adjacent plate 1. It can be understood that the number of first vents 1121 in the first vent group can be three, four, five, six, etc. The second vent group is similar and will not be described further here.

[0088] In this embodiment, since multiple first vent holes 1121 and multiple second vent holes 1122 are provided, and the multiple first vent holes 1121 and multiple second vent holes 1122 are alternately arranged, the first vent holes 1121 and multiple second vent holes 1122 can be evenly distributed, and the space occupied by the dispersed first vent hole group and the second vent hole group is increased. This avoids the gas generated by electrolysis from being discharged from the first chamber 351 and the second chamber 352 due to the aggregation of the first vent hole group and the second vent hole group, thereby improving the smoothness of gas discharge generated by electrolysis in the first chamber 351 and the second chamber 352.

[0089] Furthermore, guide grooves (not shown in the figure) can be formed on the end plate 4 of the electrolytic cell. For example... Figure 1 , Figure 3 , Figure 12 and Figure 13 As shown, in an exemplary embodiment, each electrode plate 34 may have a boss 11 with a first main liquid inlet 117 and a second main liquid inlet 118. The first main liquid inlet 117 may form a first main liquid inlet channel 1171 with the first main liquid inlet 117 of the adjacent plate 1. The second main liquid inlet 118 may form a second main liquid inlet channel 1181 with the first main liquid inlet 117 of the adjacent plate 1.

[0090] Specifically, the first main liquid inlet channel 1171 is connected to the first liquid inlet channel 6 through the guide groove of the end plate 4 of the electrolytic cell. The second main liquid inlet channel 1181 is connected to the second liquid inlet channel 7 through the guide groove of the end plate 4 of the electrolytic cell.

[0091] In this embodiment, by setting up a guide channel, a first main liquid inlet channel 1171 and a second main liquid inlet channel 1181, at least part of the electrolyte does not directly enter the chamber. Instead, the electrolyte is first transported to the chamber through the first main liquid inlet channel 1171 and the second main liquid inlet channel 1181, and then through the first liquid inlet channel 6 and the second liquid inlet channel 7 respectively. This can isolate external pressure interference and thus avoid external pressure interfering with the electrolysis process.

[0092] In one exemplary embodiment, such as Figure 3 , Figure 7 , Figure 12 and Figure 13 As shown, each electrode plate 34 may also be provided with multiple positioning holes 119 on its plate body 1. The positioning holes 119 are arranged alternately with the liquid inlet hole 111, the air outlet hole 112, and the main liquid inlet hole 111. Specifically, multiple positioning holes 119 may be provided, and the multiple positioning holes 119 are arranged around and spaced apart on the boss 11 of the plate body 1.

[0093] Positioning hole 119 is suitable for use in Figure 1During the installation of the multiple plates 34 of the multiple electrolysis units 3 shown, the positioning rod passes through the positioning hole 119, so that the positioning holes 119 of adjacent plates 1 are positioned opposite each other, thereby positioning the multiple plates 1.

[0094] In one exemplary embodiment, such as Figures 2-13 As shown, the insulating gasket 391 is provided with matching clearance holes 392 at positions opposite to the liquid inlet 111, the vent 112, the first main liquid outlet 117, and the second main liquid outlet 118. Furthermore, the insulating gasket 391 is provided with clearance holes 392 at positions opposite to the first liquid inlet 11111 and the second liquid inlet 11121, as well as at positions opposite to the first vent 1121 and the second vent 1122.

[0095] Each clearance hole 392 penetrates the insulating gasket 391, allowing the electrolyte to pass through the clearance hole 392 and enter the first chamber 351 through the first main liquid hole 117 and the first inlet hole 11111, and enter the second chamber 352 through the second main liquid hole 118 and the second inlet hole 11121. It also allows the generated hydrogen and oxygen to exit through the corresponding clearance holes 392 and vent holes 112, respectively. Similarly, the insulating gasket 391 is also provided with matching clearance holes 392 at positions opposite to the positioning holes 119.

[0096] In one exemplary embodiment, such as Figure 10 and Figure 11 As shown, the first groove 121 can be deeper than the second groove 122. After electrolysis, the gas formed in the first chamber 351 can be oxygen, and the gas formed in the second chamber 352 can be hydrogen. Since the diaphragm 31 forms the second chamber 352 based on the thickness of the insulating gasket 391 and the depth of the second groove 122, that is, the insulating gasket 391 and the second groove 122 together provide space for the second chamber 352, the depth of the second groove 122 can be shallower than the depth of the first groove 121, so that the volumes of the first chamber 351 and the second chamber 352 are similar.

[0097] In one exemplary embodiment, such as Figures 2-3 and Figure 10 As shown, the support portion 36 is located on the side of the electrode plate 34 facing the diaphragm 31. The support portion 36 is provided with flow channels to guide the electrolyte to disperse and flow in its respective chamber. The two support portions 36 have different elasticities.

[0098] In one exemplary embodiment, such as Figures 2-3 and Figure 10As shown, the two support portions 36 can be located in the two chambers respectively, and contact the cathode layer 37 and the anode layer 38 respectively, so that the cathode layer 37, the anode layer 38 and the diaphragm 31 are in close contact. Each support portion 36 has a flow channel on at least one side facing the diaphragm 31 to guide the electrolyte to disperse and flow within its respective chamber. The flow channel can be a serpentine structure, a grid structure, a mesh structure, etc., specifically limited according to actual needs. By setting the flow channel, the electrolyte can be more evenly dispersed within the chamber, improving electrolysis efficiency.

[0099] According to embodiments of this disclosure, the support portions 36 located on both sides of the diaphragm 31 have different elasticities, i.e., one has high elasticity and the other has low elasticity. Different materials can be used to form support portions 36 with different elasticities, or different structures can be employed to achieve the same elasticity. The support portions 36 contact the cathode layer 37 or the anode layer 38 and support the cathode layer 37 or the anode layer 38 in a tight bond with the diaphragm 31, providing the required rigidity. Because temperature and pressure change during the electrolysis reaction, the diaphragm 31 expands, contracts, or partially moves due to the different pressures and temperature changes on both sides. The two support portions 36 with different elasticities provide the rigidity required to maintain tight contact between the diaphragm 31 and the cathode layer 37 and anode layer 38, while also providing the necessary expansion and contraction space for the diaphragm 31.

[0100] In one exemplary embodiment, such as Figures 2-3 and Figure 10 As shown, the first surface 361 of the support portion 36 facing the diaphragm 31 has a contact surface that forms a surface contact with the cathode layer 37 or the anode layer 38. The second surface 362 of the support portion 36 opposite to the first surface 361 contacts the groove 12 surface of the electrode plate 34.

[0101] Specifically, a flow channel is disposed on the first surface 361 of the support portion 36 facing the diaphragm 31, dividing the first surface 361 into multiple regions. Each region of the first surface 361 forms a contact surface and forms surface contact with the cathode layer 37 or the anode layer 38. In this way, the compressive force on the cathode layer 37, the anode layer 38 and the diaphragm 31 can be dispersed, stress concentration can be reduced, and damage to the cathode layer 37, the anode layer 38 and the diaphragm 31 can be reduced.

[0102] In one exemplary embodiment, the electrode plate 34 and the support portion 36 can be integrally formed. Specifically, the electrode plate 34 and the support portion 36 are integrally formed by CNC machining, and the machining method is not limited here.

[0103] In one exemplary embodiment, such as Figure 2As shown, the electrode plate 34 and the support portion 36 are separate structures. The electrode plate 34 and the support portion 36 are in contact and fit together. The support portion 36 and the electrode plate 34 are two components, adopting a modular structure, which allows the support portion 36 to be replaced according to actual needs. In the event of damage to the support portion 36 or the electrode plate 34, only the support portion 36 or the electrode plate 34 can be replaced, effectively reducing costs.

[0104] In one exemplary embodiment, such as Figure 2 As shown, a nickel foam layer 39 is disposed between the cathode layer 37 and / or the anode layer 38 and the support portion 36. The nickel foam layer 39 can play a catalytic role, improving catalytic efficiency and electrolysis efficiency.

[0105] In one exemplary embodiment, such as Figure 1 As shown, multiple electrolysis units 3 are stacked sequentially to form a stacked structure. Support components and diaphragms 31 are alternately arranged in the stacked structure, with the support components on both sides of the diaphragm 31 forming two chambers suitable for containing the electrolyte. Two end plates 4 are located on the left and right sides of the stacked structure, respectively, and are coaxially aligned with the stacked structure. The mounting assembly 5 includes multiple bolts, which are evenly spaced around the outside of the stacked structure. Multiple mounting holes for mounting the bolts are provided around the periphery of the end plates 4. The bolts pass through these mounting holes to secure the stacked structure to the two end plates 4.

[0106] In one exemplary embodiment, such as Figures 1-11 As shown, each support component of the electrolysis unit 3 of the electrolytic cell forms a chamber on both sides with the corresponding diaphragm 31, so that each support component and other support components form another electrolysis unit 3.

[0107] Specifically, such as Figures 2-10 As shown, each support component of the electrolysis unit 3 includes two electrode plates 34. The electrode plates 34 and the diaphragm 31 are arranged alternately in a stacked structure. The central region of the side of each electrode plate 34 facing the diaphragm 31 is recessed inward relative to the boss 11 to form a groove 12, that is, each electrode plate 34 has two grooves 12, which are located on the left and right sides of the electrode plate 34 respectively, and can be referred to as a double electrode plate 34.

[0108] Furthermore, such as Figures 2-11As shown, the first groove 121 on the right side of the first electrode plate 34a and the second groove 122 on the left side of the second electrode plate 34b both form chambers with the diaphragm 31, thereby forming an electrolysis unit 3. The second groove 122 on the left side of the first electrode plate 34a and the groove 12 (not shown in the figure) on the right side of another electrode plate 34 (not shown in the figure) located to the left of the first electrode plate 34a form another electrolysis unit 3. The first groove 121 on the right side of the second electrode plate 34b and the groove 12 (not shown in the figure) on the left side of yet another electrode plate 34 (not shown in the figure) located to the right of the second electrode plate 34b form yet another electrolysis unit 3.

[0109] According to embodiments of this disclosure, each electrode plate 34 is provided with two grooves 12, such that each electrode plate 34 of the electrolysis unit 3 forms a chamber with the corresponding diaphragm 31, and each support component forms another electrolysis unit 3 with other support components, which can reduce the volume of the stacked structure, thereby reducing the volume of the electrolysis cell.

[0110] In one exemplary embodiment, such as Figures 1-10 As shown, each electrolysis unit 3 includes a first chamber 351 ( Figure 10 The chamber on the left side of the septum 31) and the second chamber 352 ( Figure 10 (The chamber on the right side of the diaphragm 31). In this way, the first chamber 351 and the second chamber 352 of the multiple electrolysis units 3 of the electrolytic cell are arranged alternately in sequence.

[0111] Each inlet hole 111 communicating with the first chamber 351 is aligned in the stacking direction to form a first inlet channel 6. Each inlet hole 111 communicating with the second chamber 352 is aligned in the stacking direction to form a second inlet channel 7. The first inlet channel 6 and the second inlet channel 7 are configured to allow electrolyte to enter the first chamber 351 and the second chamber 352 of each electrolysis unit 3, respectively.

[0112] In one exemplary embodiment, such as Figures 1-13 As shown, each vent 112 communicating with the first chamber 351 is arranged opposite to form a first vent channel 8, and each vent 112 communicating with the second chamber 352 is arranged opposite to form a second vent channel 9. The first vent channel 8 and the second vent channel 9 are configured to allow hydrogen or oxygen to be discharged.

[0113] According to embodiments of this disclosure, the electrolyte can enter the first chamber 351 and the second chamber 352 of each electrolysis unit 3 through the first inlet channel 6 and the second inlet channel 7, respectively. Under the action of direct current, the electrolyte in the first chamber 351 and the second chamber 352 is dissociated to release hydrogen and oxygen. The hydrogen and oxygen are discharged through the first outlet channel 8 and the second outlet channel 9, respectively. Multiple electrolysis units 3 are arranged in the stacked structure of the electrolytic cell to achieve integration.

[0114] This disclosure also provides a processing method applicable to the electrode plate 34 described above. The method may include the following steps S110-S130.

[0115] In step S110, a groove 113 is machined on the surface of the plate 1 to connect the liquid inlet hole 111 or the air outlet hole 112 of the plate 1 with the groove 12 of the plate 1.

[0116] In step S120, the first surface 21 of the pressure plate 2, which matches the shape of the groove 113, is brought into contact with and installed in the groove 113, so that the pressure plate 2 and the groove 113 are sealed together and form a plurality of through holes 212.

[0117] In step S130, multiple second sub-water lines 1151 are processed on the surface of plate 1 to form multiple first water lines 13 surrounding the groove 12 together with the first sub-water line 221 of the second surface 22 of the pressing plate 2.

[0118] According to an embodiment of this disclosure, in step S110, the pressure plate 2 can be cut from the surface of the plate 1. The pressure plate 2 and the plate 1 can be prefabricated parts processed in batches. A groove 113 can be machined on the plate 1 by milling, laser cutting, or other methods to connect the liquid inlet hole 111 or the air outlet hole 112 of the plate 1 with the groove 12 of the plate 1. A first groove 211 can be pre-machined on the first surface 21 of the pressure plate 2 by milling, laser cutting, or other methods, and multiple first sub-water lines 221 can be pre-machined on the second surface 22 of the pressure plate 2.

[0119] In step S120, the first surface 21 of the pressure plate 2, which matches the shape of the groove 113, can be installed on the groove 113 by welding (e.g., pressure welding), so that the first surface 21 of the pressure plate 2 contacts and seals with the groove 113. The multiple first grooves 211 of the pressure plate 2 and the groove 113 that seals with the pressure plate 2 cooperate to form multiple through holes 212, so that the liquid inlet hole 111 and the air outlet hole 112 are connected to the groove 12 of the plate body 1 through the through holes 212.

[0120] In step S130, multiple second sub-water lines 1151 can be processed on the surface of the plate 1 by milling, laser cutting or other methods, so as to form multiple first water lines 13 surrounding the cavity with the first sub-water line 221 of the second surface 22 of the pressure plate 2.

[0121] It should be noted that the plate 1 can be a conventional electrode plate, which can be pre-processed to form grooves 12, liquid inlet holes 111, air outlet holes 112, first main liquid hole 117, second main liquid hole 118, positioning holes 119, etc. The second sub-water lines 1151 on the surface of the plate 1 can also be pre-processed. During the process of installing the pressure plate 2 into the groove 113 of the plate 1, the multiple first sub-water lines 221 on the second surface 22 of the pressure plate 2 and the multiple second sub-water lines 1151 on the surface of the plate 1 form multiple closed first water lines 13.

[0122] According to embodiments of this disclosure, during the installation of the tablet 2 into the groove 113, the first surface 21 of the tablet 2 contacts and seals with the groove 113. Multiple first grooves 211 form multiple through holes 212 extending from the liquid inlet hole 111 or the vent hole 112 to the groove 12, guiding the electrolyte into the chamber from the liquid inlet hole 111 and guiding the gas formed after electrolysis out of the chamber through the vent hole 112 during the formation of the electrolytic cell. During the processing of the tablet 2, the first grooves 211 are machined on the first surface 21 of the tablet 2. This transforms the traditional, complex three-dimensional machining process on an integrated workpiece into a standardized, batch-processed precision machining of a two-dimensional surface (i.e., the first surface 21 of the tablet 2). There is no issue of surface obstruction, effectively reducing the machining difficulty of the first grooves 211 and improving machining accuracy. Because the shapes of the pressing plates 2 and the grooves 113 match, each pressing plate 2 can fill the space in each groove 113 except for the formed through holes 212, thereby improving the sealing performance of the electrolytic cell. In addition, the first water line 13 surrounding the groove 12 formed by the first sub-water line 221 of the second surface 22 of the pressing plate 2 and the second sub-water line 1151 of the plate 1 can be sealed together with the diaphragm 31 of the electrolytic cell to ensure the sealing performance of the electrolytic cell chamber.

[0123] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of this disclosure is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. A plate for use in an electrolytic cell, characterised in that, The plate body comprises a recess, a liquid inlet hole and a gas outlet hole, the recess is adapted to form a chamber containing electrolyte with a diaphragm of an electrolytic cell, the liquid inlet hole allows the electrolyte to enter the chamber, and the gas outlet hole allows the gas formed after electrolysis of the electrolyte to be discharged from the chamber. A plurality of recesses, each of which is recessed downward from the surface of the plate body and communicates the liquid inlet hole or the gas outlet hole with the recess; A plurality of pressing pieces, each of which is matched with the shape of the recess and is sealingly combined in the recess, each of the pressing pieces comprises: a first surface on which a plurality of first grooves are formed, the plurality of first grooves and one of the recesses sealingly combined with the pressing piece cooperate to form a plurality of through holes, each of which is used to communicate the recess with the liquid inlet hole or the gas outlet hole; a second surface opposite to the first surface, a plurality of first sub-water lines are formed on the second surface, a plurality of second sub-water lines are formed on the plate body, and the plurality of first sub-water lines are connected with the plurality of second sub-water lines to form a plurality of first water lines around the recess. The recess and the plurality of first grooves opposite to each other form a second groove, and in a pair of recesses sealingly combined with the pressing piece, the first groove and the second groove form the through hole.

2. The pole plate of claim 1, wherein In a direction perpendicular to the through hole, the cross section of the first groove away from the end of the second groove is arc-shaped.

3. The pole plate of claim 2, wherein The plate body comprises:

4. The pole plate of any one of claims 1-3, wherein, an annular boss, the liquid inlet hole, the gas outlet hole and the recess are formed on the boss, and the boss surrounds the recess. The liquid inlet hole and the gas outlet hole are oppositely arranged in the radial direction of the boss.

5. The pole plate of claim 4, wherein The boss comprises a first boss and a second boss arranged on opposite sides of the plate body, the recess comprises a first recess surrounded by the first boss and a second recess surrounded by the second boss, the first boss is adapted to be sealingly combined with the diaphragm, and the first water line is formed on the surface of the first boss close to the first recess.

6. The pole plate of claim 4, wherein The liquid inlet hole comprises:

7. The pole plate of claim 6, wherein a first liquid inlet hole which communicates with the first recess based on the through hole, so as to allow the electrolyte to enter the first chamber formed by the first liquid inlet hole and the first recess when the electrolytic cell is formed; a second liquid inlet hole which communicates with the second recess based on the through hole, so as to allow the electrolyte to enter the second chamber formed by the second liquid inlet hole and the second recess when the electrolytic cell is formed. The gas outlet hole comprises:

8. The pole plate of claim 7, wherein a first gas outlet hole which communicates with the first recess based on the through hole, so as to allow the gas formed after electrolysis to flow from the first chamber to the first gas outlet hole; a second gas outlet hole which communicates with the second recess based on the through hole, so as to allow the gas formed after electrolysis to flow from the second chamber to the second gas outlet hole. The first liquid inlet hole is arranged in a plurality of first liquid inlet hole groups, the second liquid inlet hole is arranged in a plurality of second liquid inlet hole groups, and the first liquid inlet hole group and the second liquid inlet hole group are arranged adjacent to each other in a first area of the boss; 9. The pole plate of claim 8, wherein, ​ The first gas outlet holes are arranged in a plurality of groups to form a first gas outlet hole group, and the second gas outlet holes are arranged in a plurality of groups to form a second gas outlet hole group, the first gas outlet hole group and the second gas outlet hole group being located in a second region opposite to the first region of the boss, and the plurality of first gas outlet holes and the plurality of second gas outlet holes being arranged alternately.

10. The pole plate of claim 4, wherein Further comprising: a first total liquid hole arranged on the boss and configured to form a first total liquid inlet channel with a first total liquid hole of an adjacent plate body; a second total liquid hole arranged on the boss and configured to form a second total liquid inlet channel with a first total liquid hole of an adjacent plate body.

11. The pole plate of claim 4, wherein Further comprising a positioning hole arranged on the boss and configured to allow a positioning rod to pass through.

12. The pole plate of claim 6, wherein, The first boss is formed with a plurality of closed second water lines on a surface thereof away from the first groove, and the second water lines are adapted to be sealingly combined with other plate bodies through an insulating gasket.

13. The pole plate of claim 12, wherein, The second boss is adapted to be sealingly combined with the diaphragm through the insulating gasket, the second boss is formed with a plurality of third sub-water lines on a surface thereof close to the second groove, and the second surface of the pressing sheet sealingly combined in the embedding groove of the second boss is formed with a plurality of fourth sub-water lines, the third sub-water lines and the fourth sub-water lines constituting a plurality of closed third water lines surrounding the second groove.

14. An electrolysis unit, characterized by Comprising: at least two plate bodies as claimed in any one of claims 1 to 13; a diaphragm arranged between two adjacent plate bodies to form a first chamber and a second chamber with the grooves of the two adjacent plate bodies, respectively; a cathode layer located in one of the first chamber and the second chamber, so that the electrolyte reacts to generate hydrogen gas; an anode layer located in the other of the first chamber and the second chamber, and located on a side of the diaphragm opposite to the cathode layer, so that the electrolyte reacts to generate oxygen gas.

15. An electrolytic cell characterized in that, Comprising: a plurality of electrolytic units as claimed in claim 14, the plurality of electrolytic units being stacked in sequence to form a stacked structure; two end plates located at two ends of the stacked structure, respectively; a mounting assembly adapted to fix the stacked structure and the two end plates.

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