Cathode structure and electrolysis equipment
By introducing an isopotential plate and an independently-installed cathode plate single piece in the cathode structure, the problems of small effective electrolytic area and poor maintenance of the existing cathode structure are solved, the increase of the electrolytic area and the reduction of energy consumption are achieved, and the flexibility required for the maintenance of the structure and thickness consistency are improved.
Patent Information
- Application Number
- CN202520993001.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-20
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2035-05-20
AI Technical Summary
In the process of electrolyzing manganese dioxide, the existing cathode structure has problems such as small effective electrolytic area, poor structural maintenance, poor corrosion resistance of baicalensis and high requirements for the consistency of the thickness of the cathode plate, resulting in increased electrolytic energy consumption and increased contact resistance.
A cathode structure including metal cross beams, cathode plate single piece and isopotential plate is designed. By setting an isopotential plate below the cathode plate, the zero potential of the cathode structure is shifted down, the electrolytic area is increased, and the cathode plate single piece is independently installed to achieve higher maintenance and thickness consistency requirements.
By increasing the electrolytic area and improving structural maintenance, electrolytic energy consumption is reduced, anode polarization is alleviated, and the cathode plate replacement and maintenance process is simplified.
Smart Images
Figure CN223033472U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of electrolysis equipment, and particularly to a cathode structure and an electrolysis equipment. Background Art
[0002] When electrolyzing manganese dioxide, a corresponding cathode structure needs to be designed in the electrolytic cell. The existing cathode structure has the following problems: 1. The effective electrolysis area is small; 2. The maintainability of the structure is poor; 3. In the existing cross beam, two outer layers of bakelite are used, and copper sheets arranged inside the two bakelites clamp the cathode plate. In this way, the corrosion resistance of the bakelite is poor, it is easy to age, become brittle and fall off, the load-bearing structure is unreliable, the internal copper sheets are directly exposed to the electrolytic acid mist vapor, and the corrosion is serious; moreover, this structure has extremely high requirements for the thickness consistency of the cathode plate. Uneven thickness will cause the contact resistance between the copper sheet and the cathode plate at the thin position to increase sharply, and its gap will be more likely to be attached by calcium and magnesium crystals, further increasing the contact resistance, seriously affecting the electrolysis energy consumption. Utility Model Content
[0003] The embodiments of the present application provide a cathode structure and an electrolysis equipment, which can increase the electrolysis area and improve the maintainability of the structure.
[0004] In a first aspect, the present application provides a cathode structure, including:
[0005] A metal cross beam, on which a plurality of first mounting parts are arranged at intervals along its length direction;
[0006] Single cathode plates, a plurality of single cathode plates are arranged at intervals along the length direction of the metal cross beam, and the plurality of single cathode plates are respectively connected to the first mounting parts in one-to-one correspondence;
[0007] An equipotential plate, including a first part and a second part distributed along the height direction. The first part includes a plurality of second mounting parts arranged at intervals along the length direction of the metal cross beam on the second part, and the second mounting parts are respectively connected to the plurality of single cathode plates in one-to-one correspondence; the surface of the second part parallel to the length direction of the metal cross beam is configured as an equipotential surface.
[0008] Preferably, the metal cross beam includes a first stainless steel outer sleeve and a copper beam, and the first stainless steel outer sleeve wraps the outer surface of the copper beam; the first mounting parts are arranged on the first stainless steel outer sleeve.
[0009] Preferably, a first latching block and a second conductive latching block are respectively welded at both ends of the first stainless steel outer sleeve in the length direction.
[0010] Preferably, the second conductive latching block includes a connecting block and a copper latching block; the connecting block includes an inner copper core and a second stainless steel outer sleeve wrapped around the outer periphery of the inner copper core; one side of the second stainless steel outer sleeve is welded to the first stainless steel outer sleeve; the copper latching block is welded to the other side of the second stainless steel outer sleeve.
[0011] Preferably, the first mounting portion includes two clamping plates which are arranged on both sides of the first stainless steel outer sleeve along the thickness direction of the first stainless steel outer sleeve; one end of the single cathode plate is arranged between the two clamping plates, and the clamping plates and the single cathode plate are connected by a first bolt assembly.
[0012] Preferably, in the length direction of the metal cross beam, the distance between two adjacent single cathode plates is equal to the distance between two adjacent second mounting portions.
[0013] Preferably, one end of the single cathode plate away from the first mounting portion is provided with a first stepped surface, and the second mounting portion is provided with a second stepped surface which overlaps on the first stepped surface. The first stepped surface and the second stepped surface cooperate to ensure that the equipotential plate does not protrude from the single cathode plate in the thickness direction.
[0014] Preferably, the single cathode plate and the second mounting portion are connected by a second bolt assembly.
[0015] Preferably, both the single cathode plate and the equipotential plate are made of carbon-carbon composite material.
[0016] In a second aspect, the present application provides an electrolysis device, which includes an electrolytic cell, an anode structure and a cathode structure; an electrolytic solution is arranged in the electrolytic cell; a metal cross beam is erected above the electrolytic cell, and a plurality of anode structures and a plurality of cathode structures are arranged in the electrolytic cell at intervals.
[0017] The cathode structure and the electrolysis device of the present application at least have the following beneficial effects:
[0018] In the present application, an equipotential plate is connected below the single cathode plate. The equipotential plate is divided into a first part and a second part. The first part is connected to the single cathode plate, and the second part has an equipotential surface. There is no potential difference on the equipotential surface and no current inside. Compared with the traditional technology, the equipotential plate of the present application can lower the zero potential of the cathode structure. The total electrolysis area changes from the area of the original multiple single cathode plates to the area of the cathode plate plus the area of the first part of the equipotential plate. That is to say, the equipotential plate can play the role of extending the single cathode plate, increasing the electrolysis area, improving the electrolysis efficiency, alleviating the anode polarization. Moreover, each single cathode plate in the present application is independently arranged. When damage or other abnormalities occur, it can be replaced or maintained separately, and the requirement for the thickness consistency of each single cathode plate is not high. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:
[0020] Figure 1is the front view of the cathode structure of the present application (the dashed line indicates the boundary between the first part and the second part);
[0021] Figure 2 is Figure 1 the schematic view of A-A in
[0022] Figure 3 is Figure 2 the enlarged view at A in
[0023] Figure 4 is the structural schematic view of the cathode structure of the present application;
[0024] Figure 5 is Figure 2 the enlarged view at B in
[0025] Figure 6 is Figure 4 the enlarged view at C in
[0026] Figure 7 is the schematic view of the electrolysis area of the traditional technology and the present application. Figure (A) represents the schematic view of the electrolysis area of the traditional technology, and Figure (B) represents the schematic view of the electrolysis area of the present application;
[0027] Figure 8 is the structural schematic view of the electrolysis equipment of the present application;
[0028] The descriptions of the reference numerals are as follows:
[0029] 1000, cathode structure;
[0030] 100, metal crossbeam; 110, first mounting part; 111, clamping plate; 112, first bolt assembly; 120, first stainless steel outer sleeve; 130, copper beam; 140, first latching block; 150, second conductive latching block; 151, connecting block; 1511, inner copper core; 1512, second stainless steel outer sleeve; 152, copper latching block;
[0031] 200, single cathode plate; 200a, first stepped surface; 210, second bolt assembly;
[0032] 300, equipotential plate; 310, first part; 310a, second stepped surface; 311, second mounting part; 320, second part; 320a, equipotential surface;
[0033] 2000, anode structure;
[0034] 3000, electrolytic cell;
[0035] L1, height of the single cathode plate; L2, width of the single cathode plate;
[0036] D, height of the equipotential plate; D1, height of the first part; D2, height of the second part. Detailed implementation manners
[0037] The features of various aspects of the present application and exemplary embodiments will be described in detail below. To make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present application by showing examples of the present application.
[0038] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.
[0039] This embodiment discloses a cathode structure and an electrolysis device. The cathode structure 1000 of this embodiment can be applied in an electrolytic cell 3000 to achieve corresponding chemical reactions.
[0040] As Figure 1 shown, the cathode structure 1000 of this embodiment includes a metal crossbeam 100, single cathode plates 200, and an equipotential plate. The metal crossbeam 100 is horizontally arranged, and a plurality of first mounting parts 110 are arranged at intervals along the length direction of the metal crossbeam 100. The first mounting parts 110 are used for mounting the single cathode plates 200. A plurality of single cathode plates 200 are arranged at intervals along the length direction of the metal crossbeam 100, and the plurality of single cathode plates 200 are connected to the first mounting parts 110 in one-to-one correspondence; the equipotential plate 300 includes a first part 310 and a second part 320 distributed along the height direction ( Figure 1The dashed line in ( ) indicates the demarcation line between the first part 310 and the second part 320. The first part 310 is located above, and the second part 320 is located below. The first part 310 includes a plurality of second mounting parts 311 arranged at intervals along the length direction of the metal crossbeam 100 on the second part 320. The second mounting parts 311 are connected to the plurality of single cathode plates 200 in one-to-one correspondence. The surface of the second part 320 parallel to the length direction of the metal crossbeam 100 is configured as an equipotential surface 320a. Among them, the shape of the second part 320 is a rectangular plate, and the second part 320 has at least one surface parallel to the length direction of the metal crossbeam 100, and this surface is configured as the equipotential surface 320a. It can be understood that the equipotential surface 320a is perpendicular to the thickness direction of the second part 320.
[0041] As Figure 1 shown, in this embodiment, preferably, the first mounting parts 110, the single cathode plates 200, and the second mounting parts 311 are arranged in one-to-one correspondence. The first mounting parts 110 are arranged at equal intervals on the metal crossbeam 100, which play a role in fixing the single cathode plates 200 and conducting electricity.
[0042] As Figure 1 shown, the cathode structure 1000 of this embodiment moves the zero potential of the cathode structure 1000 downward by arranging the equipotential surface 320a below the single cathode plates 200, increases the electrolysis area, improves the electrolysis efficiency, and the separately arranged single cathode plates 200 can be disassembled and maintained as needed.
[0043] As Figure 2 and Figure 3 shown, the metal crossbeam 100 includes a first stainless steel outer sleeve 120 and a copper beam 130. The first stainless steel outer sleeve 120 wraps the outer surface of the copper beam 130. The first mounting parts 110 are arranged on the first stainless steel outer sleeve 120.
[0044] As Figure 2 and Figure 3As shown, in this embodiment, preferably, the copper bar 130 is a strip structure with a certain length. The cross-sectional shapes of the copper bar 130 and the first stainless steel jacket 120 are both rectangular. The first stainless steel jacket 120 completely wraps around the outer peripheral surface of the copper bar 130, and the inner peripheral surface of the first stainless steel jacket 120 is in close contact with the outer peripheral surface of the copper bar 130. In some preferred embodiments, the first stainless steel jacket 120 and the copper bar 130 are integrally formed by hot rolling. The process is mature, the cost is lower, the overall sealing performance is good, which can prevent the electrolyte vapor from entering the inside of the first stainless steel jacket 120 and contacting the copper bar 130. At the same time, hot rolling can achieve the metallurgical bonding of the first stainless steel jacket 120 and the copper bar 130, with better overall electrical conductivity, no contact electrochemical corrosion, and higher structural strength. In some other embodiments, a corrosion-resistant layer is provided on the outer periphery of the first stainless steel jacket 120. The corrosion-resistant layer can isolate the contact between the electrolytic vapor and the first stainless steel jacket 120, reduce the corrosion of the first stainless steel jacket 120, and thus avoid introducing the corroded metal chips into the electrolytic cell. Among them, the material of the first stainless steel jacket 120 is stainless steel material, such as 316L stainless steel.
[0045] As Figure 4 shown, a first connecting block 140 and a second conductive connecting block 150 are respectively welded to both ends of the first stainless steel jacket 120 in the length direction.
[0046] As Figure 4 shown, in this embodiment, preferably, the first connecting block 140 and the second conductive connecting block 150 are respectively welded to the ends of the first stainless steel jacket 120.
[0047] In this embodiment, the conductive connecting block is connected to the first stainless steel jacket 120 by welding, avoiding the problems of poor contact, large contact resistance, and easy penetration of the gap by calcium and magnesium crystals caused by traditional threaded connections.
[0048] As Figure 4 shown, the second conductive connecting block 150 includes a connecting block 151 and a copper connecting block 152; the connecting block 151 includes an inner copper core 1511 and a second stainless steel jacket 1512 wrapped around the outer periphery of the inner copper core 1511; one side of the second stainless steel jacket 1512 is welded to the first stainless steel jacket 120; the copper connecting block 152 is welded to the other side of the second stainless steel jacket 1512.
[0049] In this embodiment, preferably, the second stainless steel jacket 1512 completely wraps around the outer periphery of the inner copper core 1511. The upper side of the second stainless steel jacket 1512 is welded to the first stainless steel jacket 120, and the lower side of the second stainless steel jacket 1512 is welded to the copper connecting block 152. The material of the second stainless steel jacket 1512 is the same as that of the first stainless steel jacket 120.
[0050] In this embodiment, the current conducts from the anode structure 2000 to the cathode plate unit 200 of the cathode structure 1000, and then through the first mounting portion 110 to the metal cross beam 100. The metal cross beam 100 then conducts to the main circuit through the second conductive block 150. The second conductive block 150 is wrapped with a second stainless steel jacket 1512 around the inner copper core 1511, which can prevent the inner copper core 1511 from being corroded.
[0051] As Figure 3 shown, the first mounting portion 110 includes two clamping plates 111, which are arranged on both sides of the first stainless steel jacket 120 along the thickness direction of the first stainless steel jacket 120; one end of the cathode plate unit 200 is arranged between the two clamping plates 111, and the clamping plates 111 and the cathode plate unit 200 are connected by a first bolt assembly 112.
[0052] As Figure 3 shown, preferably in this embodiment, the shapes of the two clamping plates 111 are both rectangular flat plates, and the two clamping plates 111 are respectively welded to both sides (both sides in the thickness direction) of the first stainless steel jacket 120, and both clamping plates 111 extend downward relative to the first stainless steel jacket 120 by at least part of the structure, and the extended structure is used to mount the cathode plate unit 200. One end of the cathode plate unit 200 is arranged between the two clamping plates 111, and the thickness of the cathode plate unit 200 is equal to the distance between the two clamping plates 111, so that the two side surfaces of the cathode plate unit 200 in the thickness direction can respectively be in close contact with the inner side surfaces of the two clamping plates 111.
[0053] As Figure 3 shown, preferably in this embodiment, the clamping plates 111 and the cathode plate unit 200 are connected by at least one first bolt assembly 112, and the material of the first bolt assembly 112 is stainless steel material, which can avoid erosion.
[0054] In this embodiment, the clamping plates 111 and the cathode plate unit 200 are used for connection, and the overall number of bolt assemblies required is small, which can achieve lightweight, and there is no need to design bolt assemblies for connecting with the cathode plate unit 200 on the metal cross beam 100, which can ensure the strength of the metal cross beam 100 and avoid internal corrosion.
[0055] As Figure 1 shown, in the length direction of the metal cross beam 100, the distance H1 between two adjacent cathode plate units 200 is equal to the distance H2 between two adjacent second mounting portions 311.
[0056] As Figure 1As shown, in the length direction of the metal crossbeam 100, the distance between two adjacent single cathode plates 200 is H1, and in the length direction of the metal crossbeam 100, the distance between two adjacent second mounting parts 311 is H2. H1 is equal to H2. The distances H1 and H2 are for facilitating the flow of chemical substances in the electrolytic cell 3000 and at the same time facilitating the one-to-one corresponding connection between the second mounting part 311 and the single cathode plate 200.
[0057] As Figure 1 shown, preferably in this embodiment, in the length direction of the metal crossbeam 100, the distance between two adjacent clamping plates 111 is H3, and H1, H2 and H3 are equal. H1, H2 and H3 form a through groove with equal width.
[0058] As Figure 5 and Figure 6 shown, preferably in this embodiment, the equipotential plate 300 includes an upper first part 310 and a lower second part 320. The first part 310 and the second part 320 each account for one-half of the equipotential plate 300 in the height direction. The first part 310 includes a plurality of second mounting parts 311 arranged at equal intervals along the length direction of the metal crossbeam 100. Among them, the plurality of second mounting parts 311 of the first part 310 and the second part 320 are integrally formed, and the structural strength is high.
[0059] As Figure 5 and Figure 6 shown, at one end of the single cathode plate 200 away from the first mounting part 110, a first step surface 200a is provided, and the second mounting part 311 is provided with a second step surface 310a that overlaps on the first step surface 200a. The cooperation between the first step surface 200a and the second step surface 310a enables the equipotential plate 300 not to protrude from the single cathode plate 200 in the thickness direction.
[0060] As Figure 5 shown, preferably in this embodiment, the thickness of the single cathode plate 200 is the same as the thickness of the second part 320.
[0061] As Figure 5 shown, preferably in this embodiment, a first step surface 200a is provided at the lower end of the single cathode plate 200, and the second mounting part 311 is provided with a second step surface 310a. The first step surface 200a can overlap and be completely fitted with the second step surface 310a. After the first step surface 200a and the second step surface 310a overlap, both sides in the thickness direction of the equipotential plate 300 (that is, the two sides perpendicular to the thickness direction) are respectively flush with the two sides of the single cathode plate 200. Specifically: from the perspective of the length direction of the metal crossbeam 100, the first side of the equipotential plate 300 is flush with the first side of the single cathode plate 200, and the second side of the equipotential plate 300 is flush with the second side of the single cathode plate 200.
[0062] In this embodiment, the single cathode plate 200 and the second mounting portion 311 are connected in the form of a stepped surface, so that the single cathode plate 200 and the equipotential plate 300 are just complementary without protrusion, which can prevent short circuit and collision damage caused by touching the adjacent anode structure 2000. At the same time, a stepped surface lap joint is carried out at the lower end of the single cathode plate 200, and the cathode-anode distance can be reduced. More cathode structures and anode structures can be placed in the electrolytic cell 3000 of the same size, improving the production efficiency of a single cell.
[0063] As Figure 6 shown, the single cathode plate 200 and the second mounting portion 311 are connected by a second bolt assembly 210.
[0064] As Figure 6 shown, preferably in this embodiment, a countersunk bolt hole is provided on the second mounting portion 311, and the second bolt assembly 210 is connected to the single cathode plate 200 through the countersunk bolt hole. The countersunk bolt hole can reduce the overall thickness of the cathode structure and avoid interference with the anode. Preferably in this embodiment, the second bolt assembly 210 is made of a plastic material, such as polyether ether ketone. The plastic second bolt assembly 210 is corrosion-resistant and lightweight, and is cheaper than the bolt made of carbon-carbon material.
[0065] In this embodiment, the single cathode plate 200 and the second mounting portion 311 are connected by a second bolt assembly 210, which can achieve quick disassembly and assembly.
[0066] Both the single cathode plate 200 and the equipotential plate 300 are made of carbon-carbon composite material.
[0067] Preferably in this embodiment, the single cathode plate 200, the first part 310 and the second part 320 of the equipotential plate 300 are all made of carbon-carbon composite material.
[0068] As Figure 7 shown, in this embodiment, the first part 310 serves to extend the single cathode plate 200, that is, both the single cathode plate 200 and the first part 310 can provide an effective electrolysis area, while the second part 320 can provide an equipotential surface 320a to shift the zero potential downward and increase the electrolysis area, specifically as Figure 7 shown:
[0069] Figure 7 In (A) of , it shows the electrolysis area of the traditional cathode structure, and its effective electrolysis area is
[0070] Figure 7 In (B) of , it shows the electrolysis area of the cathode structure of this embodiment, and its effective electrolysis area is
[0071] Wherein, L1 represents the height of a single cathode plate; L2 represents the width of a single cathode plate; N represents the number of single cathode plates; D represents the height of the equipotential plate; D1 represents the height of the first part; D2 represents the height of the second part.
[0072] As can be seen from the above, the electrolysis area S2 of the cathode structure in this embodiment is larger than the electrolysis area S1 of the traditional cathode structure.
[0073] As Figure 8 shown, this embodiment also provides an electrolysis device, which includes an electrolysis cell 3000, an anode structure 2000 and a cathode structure 1000; an electrolyte is provided in the electrolysis cell 3000; a metal crossbeam 100 is erected above the electrolysis cell 3000, and a plurality of anode structures 2000 and a plurality of cathode structures 1000 are arranged at intervals in the electrolysis cell 3000. Preferably, in this embodiment, a plurality of anode structures 2000 and a plurality of cathode structures 1000 are arranged at intervals one by one in the electrolysis cell 3000.
[0074] Preferably, in this embodiment, the metal crossbeam 100 and the first mounting portion 110 of the cathode structure 1000 are both above the liquid level of the electrolyte.
[0075] The above is only the specific implementation manner of the present application. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described systems, modules and units can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here. It should be understood that the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should all be covered within the protection scope of the present application.
Claims
1. A cathode structure, characterized in that: include: A metal crossbeam (100) having a plurality of first mounting portions (110) arranged at intervals along a length direction thereof; A cathode plate single piece (200), wherein a plurality of cathode plate single pieces (200) are arranged at intervals along the length direction of the metal crossbeam (100), and the plurality of cathode plate single pieces (200) are connected to the first mounting portion (110) in a one-to-one correspondence; An equipotential plate (300) comprises a first part (310) and a second part (320) distributed along a height direction, wherein the first part (310) comprises a plurality of second mounting portions (311) arranged on the second part (320) at intervals along a length direction of a metal beam (100), the second mounting portions (311) being connected to a plurality of cathode plate single pieces (200) in a one-to-one correspondence; and a surface of the second part (320) parallel to the length direction of the metal beam (100) is configured as an equipotential surface (320a).
2. The cathode structure according to claim 1, characterized in that: The metal crossbeam (100) comprises a first stainless steel outer shell (120) and a copper beam (130), wherein the first stainless steel outer shell (120) is wrapped around the outer surface of the copper beam (130); and the first mounting portion (110) is arranged on the first stainless steel outer shell (120).
3. The cathode structure according to claim 2, characterized in that: A first block (140) and a second conductive block (150) are respectively welded to two ends of the first stainless steel outer sleeve (120) in the length direction.
4. The cathode structure according to claim 3, characterized in that: The second conductive stack (150) comprises a connection block (151) and a copper stack (152); the connection block (151) comprises an inner copper core (1511) and a second stainless steel jacket (1512) wrapped around the outer periphery of the inner copper core (1511); one side of the second stainless steel jacket (1512) is welded to the first stainless steel jacket (120); and the copper stack (152) is welded to the other side of the second stainless steel jacket (1512).
5. The cathode structure according to claim 2, characterized in that: The first mounting portion (110) comprises two clamping plates (111), the two clamping plates (111) being arranged on both sides of the first stainless steel outer casing (120) along the thickness direction of the first stainless steel outer casing (120); one end of the cathode plate single piece (200) is arranged between the two clamping plates (111), and the clamping plates (111) and the cathode plate single piece (200) are connected via a first bolt assembly (112).
6. The cathode structure according to claim 1, characterized in that: In the length direction of the metal crossbeam (100), the distance between two adjacent cathode plate single pieces (200) is equal to the distance between two adjacent second mounting portions (311).
7. The cathode structure according to any one of claims 1 to 6, characterized in that: A first step surface (200a) is provided at one end of the cathode plate single piece (200) away from the first mounting portion (110), and a second step surface (310a) overlapped on the first step surface (200a) is provided on the second mounting portion (311), and the first step surface (200a) and the second step surface (310a) cooperate to achieve that the equipotential plate (300) does not protrude from the cathode plate single piece (200) in the thickness direction.
8. The cathode structure according to claim 7, characterized in that: The cathode plate single piece (200) and the second mounting portion (311) are connected via a second bolt assembly (210).
9. The cathode structure according to any one of claims 1 to 6, characterized in that: The cathode plate single piece (200) and the equipotential plate (300) are both made of carbon-carbon composite material.
10. An electrolysis device, characterized in that: The invention comprises an electrolytic cell (3000), an anode structure (2000), and a cathode structure (1000) as claimed in any one of claims 1 to 9; an electrolyte is arranged in the electrolytic cell (3000); a metal beam (100) is erected above the electrolytic cell (3000), and a plurality of anode structures (2000) and a plurality of cathode structures (1000) are arranged in the electrolytic cell (3000) at intervals.