Electrolytic tank adopting high-current-density supporting structure

Abstract

The utility model relates to the field of electrolytic hydrogen, and mainly discloses an electrolytic bath adopting a high-current-density supporting structure, which comprises a bath body, a liquid adding box, a sliding rail, a supporting frame and a first connecting nozzle, the bath body comprises an end plate, a partition plate, an electrode plate, an assembling rod and a second connecting nozzle, annular grooves are formed in the two end faces of the partition plate, and an electrode slice is fixedly installed in the center of the interior of the electrode plate. Supporting nets are fixedly installed outside the two sides of the electrode plate, the supporting nets are integrally formed, and square grooves are formed in the supporting nets. The supporting net is designed and formed by adopting a square groove, a high-density supporting structure is formed, the contact area of the high-density supporting structure is larger, the hydrogen electrolysis efficiency is further improved, the planeness tolerance is relatively low, the supporting net can be attached to an electrode more tightly, and resistance is reduced; hydrogen bubbles can permeate the back surface of the flow field, and air resistance and cavitation erosion are reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen electrolysis, and more specifically, to an electrolyzer employing a high electrical density support structure. Background Technology

[0002] Developing new energy systems and reducing dependence on fossil fuels are crucial means to achieve carbon neutrality. Green hydrogen production is a vital component of new energy development, and the ALK electrolyzer is currently the core equipment for green hydrogen production. Structurally, there are two main types: one is the convex bipolar plate flow field structure, and the other is the planar bipolar plate rhombic support mesh flow field structure. The convex structure suffers from drawbacks such as high mold costs, fewer support points, lower unit current density, larger overall flatness tolerance, and larger equipment size. The rhombic support mesh structure has defects such as coating peeling, sharp burrs on the edges, and poor batch consistency.

[0003] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0004] The purpose of this invention is to provide an electrolytic cell with a high electrical density support structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An electrolytic cell employing a high electrical density support structure includes a horizontally arranged cell body. A liquid addition tank is positioned directly above the cell body. Slide rails extending along the length of the cell body are located on both sides of its lower surface, allowing the cell body to slide smoothly on the slide rails. Support frames are fixedly installed on the exterior of the liquid addition tank near both ends, with the bottom of the support frames fixedly installed on the top of the cell body. First connection nozzles are installed at both ends of the liquid addition tank, with two first connection nozzles at each end, arranged vertically. The cell body includes two oppositely arranged end plates, with several partitions between the end plates. Electrode plates are sandwiched between adjacent partitions. The components are fixedly connected by an assembly rod. The outer wall of the end plate is equipped with a second connecting nozzle arranged vertically. The upper second connecting nozzle is connected to the first connecting nozzle located on the same upper side via a connecting pipe. The lower second connecting nozzle is connected to the first connecting nozzle located on the same lower side via a connecting pipe. Annular grooves are formed on both ends of the partition plate. The electrode plate is generally circular in shape. The outer surface of the electrode plate is fitted into adjacent annular grooves. An electrode sheet is fixedly installed in the center of the electrode plate. Support meshes are fixedly installed on both sides of the electrode sheet. The support meshes are integrally formed and have square grooves.

[0007] Furthermore, the bottom end of the support frame is fixedly installed at both ends of the top of the end plate, and a reinforcing ring is fixedly installed on the outside of the liquid filling tank.

[0008] Furthermore, an extension ear is integrally provided on one side of the top of the partition, and a conductive rod is provided between the two end plates. The extension ears located on the same side are all connected by the same conductive rod.

[0009] Furthermore, the top of the end plate is symmetrically provided with notches along the center, and the extension ears on one side of the top of two adjacent partitions are staggered. The two ends of the conductive rod are fixedly installed in the notches, and a conductive sheet is also fixedly installed at one end of the conductive rod. A spacer is also fixedly installed on the outside of the conductive rod, and the spacer is located between two adjacent extension ears on the same side.

[0010] Furthermore, an extension block is integrally provided on both sides of the bottom of the end plate, a slide seat is slidably installed on the top of the slide rail, a support block is fixedly installed on the top of the slide seat, a groove is provided on the top of the support block, the extension block is fixedly installed in the groove, and the two end plates are connected on both sides of the bottom by a connecting rod, the connecting rod passing through the top of the extension block and the support block.

[0011] Furthermore, a first air hole is provided on the side of the partition near the extension ear, a second air hole is provided on the electrode plate opposite to the first cylinder, a first liquid guiding hole is provided at the bottom of the partition, and a second liquid guiding hole is provided on the electrode plate opposite to the first liquid guiding hole.

[0012] Compared with the prior art, the present invention has the following advantages: The support mesh used in the present invention adopts a square groove design to form a high-density support structure. The high-density support structure has a higher contact area, which further improves the efficiency of hydrogen electrolysis. The flatness tolerance is relatively low, which can fit more tightly with the electrode and reduce resistance. Because the contact surface is a porous structure, it is more conducive to the back of the flow field of hydrogen bubble penetration, reducing gas resistance and cavitation. The height of the high-electric-density support structure has strong adjustment capability, which can be adjusted from 2mm to 6mm without the need for additional molds and equipment, making it more convenient to manufacture. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1This is a schematic diagram of an electrolytic cell with a high electrical density support structure according to an embodiment of the present utility model;

[0015] Figure 2 This is a schematic diagram of the liquid addition tank in an electrolytic cell with a high electrical density support structure according to an embodiment of the present utility model;

[0016] Figure 3 This is a schematic diagram of the structure of an electrolytic cell with a high electrical density support structure according to an embodiment of the present utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the middle end plate of an electrolytic cell with a high electrical density support structure according to an embodiment of the present utility model;

[0018] Figure 5 This is a schematic diagram of the slide rail in an electrolytic cell with a high electrical density support structure according to an embodiment of the present utility model;

[0019] Figure 6 This is an assembly diagram of the partition plate and electrode plate in an electrolytic cell with a high electrical density support structure according to an embodiment of the present utility model;

[0020] Figure 7 This is a schematic diagram of the structure of a partition plate in an electrolytic cell with a high electrical density support structure according to an embodiment of the present utility model;

[0021] Figure 8 This is a schematic diagram of the structure of an electrode plate in an electrolytic cell with a high electrical density support structure according to an embodiment of the present utility model;

[0022] Figure 9 This is a schematic diagram of the support mesh in an electrolytic cell with a high electrical density support structure according to an embodiment of the present utility model;

[0023] Figure 10 yes Figure 9 Enlarged view of point A in the middle.

[0024] Figure label:

[0025] 1. Tank body; 2. Liquid filling tank; 3. Slide rail; 4. Support frame; 5. Reinforcing ring; 6. Liquid filling port; 7. First connecting nozzle; 8. Connecting pipe; 9. End plate; 10. Partition plate; 11. Electrode plate; 12. Assembly rod; 13. Extension ear; 14. Conductive rod; 15. Conductive sheet; 16. Spacer; 17. Second connecting nozzle; 18. Notch groove; 19. Extension block; 20. Slide seat; 21. Support block; 22. Connecting rod; 23. Groove; 24. Limiting hole; 25. Annular groove; 26. First vent hole; 27. First liquid guiding hole; 28. Electrode sheet; 29. ​​Second vent hole; 30. Second liquid guiding hole; 31. Support mesh; 311. Square groove. Detailed Implementation

[0026] The utility model will now be further described with reference to the accompanying drawings and specific embodiments:

[0027] Please see Figures 1-10 An electrolytic cell with a high electrical density support structure according to an embodiment of the present invention includes a cell body 1, which is horizontally arranged, and a liquid addition tank 2 is provided directly above the cell body 1. Slide rails 3 are provided on both sides of the lower part of the cell body 1 along its length, and the cell body 1 is slidably mounted on the slide rails 3. Support frames 4 are fixedly installed on the outside of the liquid addition tank 2 near both ends, and the bottom of the support frames 4 is fixedly installed on the top of the cell body 1. First connecting nozzles 7 are installed at both ends of the liquid addition tank 2, with two first connecting nozzles 7 at each end of the liquid addition tank 2 arranged vertically. The cell body 1 includes two end plates 9 arranged opposite each other, and several partitions 1 are provided between the end plates 9. 0. An electrode plate 11 is sandwiched between two adjacent partitions 10. The two end plates 9 are fixedly connected by an assembly rod 12. An extension ear 13 is integrally provided on one side of the top of the partition 10. A conductive rod 14 is also provided between the two end plates 9. The extension ears 13 on the same side are all connected by the same conductive rod 14. A second connecting nozzle 17 is installed on the outer wall of the end plate 9 in an up-down arrangement. The second connecting nozzle 17 located on the upper side is connected to the first connecting nozzle 7 located on the upper side on the same side through a connecting pipe 8. The second connecting nozzle 17 located on the lower side is connected to the first connecting nozzle 7 located on the lower side on the same side through a connecting pipe 8.

[0028] Add raw water to the liquid filling tank 2. The water in the liquid filling tank 2 can then flow through the first connecting nozzle 7 below to the connecting pipe 8 and into the second connecting nozzle 17 below. It then flows through the second connecting nozzle 17 below into the bottom of the partition plate 10 between the two end plates 9, thus disconnecting from the electrode plate 11. When electricity is applied through the conductive rod 14, the current is transmitted through the conductive rod 14 to the extension ear 13 and finally through the partition plate 10 to the electrode plate 11, thus realizing the hydrogen electrolysis operation. The gas generated during the hydrogen electrolysis process will flow through the top of the partition plate 10 to the second connecting nozzle 17 at the top of the end plate 9, and finally flow into the top of the liquid filling tank 2 through the second connecting nozzle 17 above and the connecting pipe 9.

[0029] The bottom end of the support frame 4 is fixedly installed at both ends of the top of the end plate 9, and a reinforcing ring 5 is fixedly installed on the outside of the liquid filling tank 2.

[0030] The top of the end plate 9 has symmetrical notches 18 along its center. The extension ears 13 on one side of the top of two adjacent partitions 10 are staggered. Both ends of the conductive rod 14 are fixedly installed in the notches 18, and a conductive sheet 15 is fixedly installed at one end of the conductive rod 14. A spacer 16, made of insulating material, is fixedly installed on the outside of the conductive rod 14 and is positioned between two adjacent extension ears 13 on the same side. The spacer 16 ensures the stability of the extension ears 13, thereby indirectly determining the stability of the partition 10, and also prevents the influence of the same current flowing between two adjacent partitions 10.

[0031] The end plate 9 has extension blocks 19 integrally formed on both sides of its bottom. A slide block 20 is slidably mounted on the top of the slide rail 3. A support block 21 is fixedly mounted on the top of the slide block 20. A groove 23 is formed on the top of the support block 21, and the extension blocks 19 are fixedly installed in the groove 23. The two end plates 9 are also connected on both sides of their bottom by a connecting rod 22, which passes through the top of the extension blocks 19 and the support blocks 21. This configuration allows the entire groove 1 to slide and adjust on the top of the slide rail 3 using the end plates 9, facilitating various practical applications.

[0032] The partition plate 9 has annular grooves 25 on both ends. The electrode plate 11 is generally circular in shape, and its exterior is fitted into the adjacent annular grooves 25. An electrode sheet 28 is fixedly installed in the center of the electrode plate 11, and a support mesh 31 is fixedly installed on both sides of the electrode sheet 28. The support mesh 31 is integrally formed and has square grooves 311, which form a wavy shape. This configuration of the support mesh 31 increases the contact area between the liquid and the support mesh 31, thereby improving the efficiency of electrolysis.

[0033] A first air hole 26 is provided on the side of the partition 9 near the extension ear 13, and a second air hole 29 is provided on the electrode plate 11 opposite to the first cylinder 26. A first liquid guiding hole 27 is provided at the bottom of the partition 9, and a second liquid guiding hole 30 is provided on the electrode plate 11 opposite to the first liquid guiding hole 27.

[0034] The support mesh 31 used in this utility model is designed and formed with square grooves 311 to create a high-density support structure. Taking 1000 standard square mesh as an example:

[0035] 1. Contact area between electrode and flow field surface: 5% for convex structure; 18% for rhomboid mesh structure; and up to 48% for high-density support structure.

[0036] 2. Flatness tolerance: ±0.2mm for the convex structure, ±0.1mm for the diamond-shaped support mesh structure, and ±0.05mm for the high-electric-density support structure. This allows for a tighter fit with the electrodes, reducing resistance.

[0037] 3. Because the contact surface has a porous structure, it is more conducive to the back of the flow field where hydrogen bubbles permeate, reducing gas resistance and cavitation.

[0038] 4. The height of the high-electric-density support structure is highly adjustable, ranging from 2mm to 6mm, without the need for additional molds and equipment, making manufacturing more convenient.

[0039] 5. The mesh size and unit weight can be adjusted according to different customer needs to meet different electrical density design requirements.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electrolytic cell employing a high electrical density support structure, comprising a horizontally arranged cell body (1), characterized in that, A liquid filling tank (2) is provided directly above the tank (1). Slide rails (3) are provided on both sides of the tank (1) along its length. The tank (1) slides on the slide rails (3). A support frame (4) is fixedly installed near both ends of the liquid filling tank (2). The bottom of the support frame (4) is fixedly installed on the top of the tank (1). First connecting nozzles (7) are installed at both ends of the liquid filling tank (2). Each end of the liquid filling tank (2) has two first connecting nozzles (7) arranged vertically. The tank (1) includes two end plates (9) arranged opposite each other. Several partitions (10) are provided between the end plates (9). An electrode plate (11) is sandwiched between two adjacent partitions (10). The two end plates (9) are fixedly connected by an assembly rod (12). 9) The outer wall is equipped with a second connecting nozzle (17) arranged vertically. The second connecting nozzle (17) located at the top is connected to the first connecting nozzle (7) located at the top on the same side through the connecting pipe (8). The second connecting nozzle (17) located at the bottom is connected to the first connecting nozzle (7) located at the bottom on the same side through the connecting pipe (8). The two ends of the partition (10) are provided with annular grooves (25). The electrode plate (11) is in the shape of a circular frame. The outside of the electrode plate (11) is locked in the adjacent annular grooves (25). An electrode sheet (28) is fixedly installed in the center of the inside of the electrode plate (11). Support nets (31) are fixedly installed on the outside of both sides of the electrode sheet (28). The support nets (31) are integrally formed. The support nets (31) are provided with square grooves (311).

2. An electrolytic cell employing a high electrical density support structure according to claim 1, characterized in that, The bottom end of the support frame (4) is fixedly installed at both ends of the top of the end plate (9), and a reinforcing ring (5) is fixedly installed on the outside of the liquid filling tank (2).

3. An electrolytic cell employing a high electrical density support structure according to claim 2, characterized in that, An extension ear (13) is integrally provided on one side of the top of the partition (10), and a conductive rod (14) is provided between the two end plates (9). The extension ears (13) located on the same side are all connected by the same conductive rod (14).

4. An electrolytic cell employing a high electrical density support structure according to claim 3, characterized in that, The top of the end plate (9) is symmetrically provided with notches (18) along the center. The extension ears (13) on one side of the top of the two adjacent partitions (10) are staggered. The two ends of the conductive rod (14) are fixedly installed in the notches (18), and a conductive sheet (15) is also fixedly installed at one end of the conductive rod (14). A spacer (16) is also fixedly installed on the outside of the conductive rod (14). The spacer (16) is located between two adjacent extension ears (13) on the same side.

5. An electrolytic cell employing a high electrical density support structure according to claim 4, characterized in that, The end plate (9) has extension blocks (19) integrally provided on both sides of its bottom. The slide rail (3) has a slide seat (20) slidably installed on its top. The slide seat (20) has a support block (21) fixedly installed on its top. The support block (21) has a groove (23) on its top. The extension block (19) is fixedly installed in the groove (23). The two end plates (9) are also connected on both sides of their bottom by a connecting rod (22). The connecting rod (22) passes through the top of the extension block (19) and the support block (21).

6. An electrolytic cell employing a high electrical density support structure according to claim 5, characterized in that, A first air hole (26) is provided on the side of the partition (10) near the extension ear (13), a second air hole (29) is provided on the electrode plate (11) opposite to the first air hole (26), a first liquid guiding hole (27) is provided at the bottom of the partition (10), and a second liquid guiding hole (30) is provided on the electrode plate (11) opposite to the first liquid guiding hole (27).

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