A formation foil production system

Abstract

The application provides a chemical conversion foil preparation system for chemical conversion treatment of aluminum foil, which comprises a chemical conversion tank containing a chemical conversion solution and a cleaning tank containing a cleaning solution, and a heat circulation system is arranged between the chemical conversion tank and the cleaning tank. The chemical conversion foil preparation system of the application conducts heat energy of high-temperature chemical conversion solution in the chemical conversion tank to the cleaning solution in the cleaning tank to warm the cleaning solution, so that the cleaning solution is at a higher temperature, microbial growth is inhibited, and the phenomenon of moss attached to the foil surface of the chemical conversion foil is reduced.

Description

Technical Field

[0001] This application relates to the field of aluminum foil formation technology, specifically to a formation foil preparation system that recycles thermal energy. Background Technology

[0002] With the development of automation in automotive electronic systems and the rapid development of electronic equipment systems, the demand for aluminum electrolytic capacitors, solid capacitors, and solid-liquid hybrid capacitors is increasing. As the main core material of aluminum electrolytic capacitors, low-voltage anode foil is becoming increasingly important. To meet market demand, the production of high-quality formed aluminum foil is a market trend. The current development direction is to research and develop high-quality low-voltage formed foil and improve the yield rate of the process to increase production capacity, so as to win market share and enhance product competitiveness with high-quality products.

[0003] In conventional electrolytic foil manufacturing processes, the cleaning tank typically uses room-temperature pure water, while the electrolytic solution in the tank contains organic and inorganic acids and other chemicals. These chemicals react electrochemically on the foil surface under high-temperature conditions to form an oxide film. The primary function of the electrolytic foil cleaning tank is to clean residual chemicals from the foil surface to purify it.

[0004] After the forming solution on the foil surface is cleaned in the cleaning tank, the remaining solution in the pure water of the cleaning tank quickly promotes the growth of microorganisms, such as organic and inorganic acids, under room temperature pure water conditions, easily leading to algae growth and the formation of moss. The moss growing in the cleaning tank will adhere to the foil surface, forming black spots of varying sizes. In addition to producing defective products with black spots on the foil surface, large areas of black spots will cause product defects such as reduced effective area, high ESR, high leakage current, low insulation film strength, and reduced withstand voltage during capacitor manufacturing, ultimately reducing the lifespan of the capacitor.

[0005] Current methods for removing algae include: 1. Increasing the amount of pure water used to increase the water replacement rate; 2. Using electric heating to sterilize the pure water; 3. Installing ultraviolet lamps in the cleaning tank for sterilization; 4. Adding sterilizing agents to the pure water for sterilization. However, all of the above sterilization methods increase labor costs and manufacturing costs.

[0006] Therefore, researching a chemical foil preparation system that rationally utilizes thermal energy to inhibit algal growth has become an urgent problem for those skilled in the art. Utility Model Content

[0007] In order to overcome the defects of the prior art, this application provides a chemically formed foil preparation system, which uses the heat energy of the chemically formed liquid in the chemically formed tank to heat the cleaning liquid in the cleaning tank, thereby inhibiting algae growth and preventing the formation of moss.

[0008] Specifically, this application provides a chemically formed foil preparation system for chemically forming aluminum foil. The system comprises a chemically formed tank and a cleaning tank. The chemically formed tank contains a chemically formed solution, and the cleaning tank contains a cleaning solution. A thermal circulation system is provided between the chemically formed tank and the cleaning tank. The thermal circulation system includes an inlet main pipe, a chemically formed solution circulation pump, an outlet pipe, a heat exchange pipe, and a return main pipe. The chemically formed solution circulation pump is located between the chemically formed tank and the cleaning tank. One end of the inlet main pipe is connected to the bottom of the chemically formed tank, and the other end is connected to the inlet of the chemically formed solution circulation pump. One end of the outlet pipe is connected to the outlet of the chemically formed solution circulation pump, and the other end is connected to one end of the heat exchange pipe. The heat exchange pipe is located inside the cleaning tank and immersed in the cleaning solution. The other end of the heat exchange pipe is connected to one end of the return main pipe, and the other end of the return main pipe is connected to the upper part of the chemically formed tank.

[0009] Since the chemical formation process needs to be carried out in a high-temperature environment (70℃-80℃), the chemical formation liquid in the chemical formation tank has a large amount of heat energy. The heat energy can be transferred to the cleaning liquid in the cleaning tank through the heat exchange pipe to increase the temperature of the cleaning liquid.

[0010] In one alternative implementation, the heat exchange tube includes several heat conduction tubes, with the liquid flowing inside the heat conduction tubes, and the heat conduction tubes are connected in series.

[0011] In another alternative implementation, the heat exchange tube includes several heat conduction tubes, with liquid flowing inside the heat conduction tubes, and the heat conduction tubes are connected in parallel.

[0012] In one alternative implementation, the electrolytic foil preparation system includes several electrolytic cells and several cleaning cells; each electrolytic cell contains an electrolytic solution, each cleaning cell contains a cleaning solution, and each cleaning cell is equipped with a heat exchange tube; the heat circulation system also includes several inlet branch pipes, several branch pipes, several return branch pipes, and several return branch pipes; one end of each inlet branch pipe is connected to the bottom of a corresponding electrolytic cell, and the other end is connected to the main inlet pipe; one end of each branch pipe is connected to the outlet pipe, and the other end is connected to the heat exchange tube of a corresponding cleaning cell; one end of each return branch pipe is connected to the heat exchange tube of a corresponding cleaning cell, and the other end is connected to the main return pipe; one end of each return branch pipe is connected to the main return pipe, and the other end is connected to the upper part of a corresponding electrolytic cell.

[0013] In one alternative implementation, each inlet branch pipe is equipped with an inlet valve, each branch pipe is equipped with a branch valve, each return branch pipe is equipped with a return valve, and each return branch pipe is equipped with a branch valve.

[0014] In one alternative implementation, each cleaning tank is equipped with a spray circulation system, which includes a spray inlet pipe, a spray circulation pump, a filter, a main spray pipe, and several spray branch pipes. One end of the spray inlet pipe is connected to the bottom of the cleaning tank, and the other end of the spray inlet pipe is connected to the inlet of the spray circulation pump. The outlet of the spray circulation pump is connected to the filter inlet, and the filter outlet is connected to one end of the main spray pipe. The ends of the main spray pipe are connected to the spray branch pipes side by side, and each spray branch pipe is provided with several spray holes.

[0015] In one alternative implementation, the spray inlet pipe is equipped with a first circulation valve, and the spray main pipe is equipped with a second circulation valve.

[0016] In one alternative implementation, a temperature probe is installed inside the cleaning tank, the temperature probe is immersed in the cleaning liquid, and the temperature probe is electrically connected to a thermometer.

[0017] In one alternative implementation, spray branches are arranged in pairs on opposite surfaces of aluminum foil immersed in a cleaning tank.

[0018] In one alternative implementation, the electrolytic foil preparation system sequentially includes: a primary electrolytic cell, a secondary electrolytic cell, and a tertiary electrolytic cell, all arranged in a continuous manner, each containing an electrolytic solution; a first cleaning tank containing a cleaning solution; a phosphoric acid treatment tank containing a phosphoric acid treatment solution; a second cleaning tank containing a cleaning solution; a fourth electrolytic cell containing an electrolytic solution; a third cleaning tank containing a cleaning solution; an electric furnace for heat treatment; a repair treatment tank containing a repair treatment solution; a fourth cleaning tank containing a cleaning solution; and a drying oven for drying. A thermal circulation system is provided between the primary, secondary, and tertiary electrolytic cells and the first, second, third, and fourth cleaning tanks.

[0019] The technical solution provided by the aforementioned implementation method has at least the following beneficial effects: (1) The electroforming foil preparation system of this application heats the cleaning liquid in the high temperature electroforming tank to the cleaning liquid in the cleaning tank, thereby heating the cleaning liquid so that the cleaning liquid is at a higher temperature, which can inhibit the growth of microorganisms and reduce the occurrence of moss on the surface of the electroforming foil.

[0020] (2) The electrochemical foil preparation system of this application effectively utilizes the heat conduction effect by connecting the electrochemical liquid of the multi-stage electrochemical tank to the thermal circulation system, which facilitates the adjustment of the temperature of the electrochemical liquid in each electrochemical tank and keeps the electrochemical treatment in each electrochemical tank at a suitable reaction temperature.

[0021] (3) The chemical foil preparation system of this application enhances the cleaning of the foil surface in the cleaning tank by setting a spray circulation system in the cleaning tank, thereby reducing the adhesion of moss.

[0022] (4) The electroforming foil preparation system of this application can effectively improve the preparation efficiency and performance of electroforming foil by reasonably setting each process section. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the structure of the chemical forming tank and the cleaning tank in a chemical forming foil preparation system provided in one embodiment of this application; Figure 2 A schematic diagram of a chemical foil preparation system provided in one embodiment of this application; Figure 3 A schematic diagram of the structure of the heat exchange tube in the cleaning tank provided in one embodiment of this application; Figure 4 A schematic diagram of the structure of a heat exchange tube in a cleaning tank provided in another embodiment of this application; Figure 5 A schematic diagram of a spray circulation system for a cleaning tank provided in one embodiment of this application; Figure 6 A schematic diagram showing the location of the spray branch pipes in a spray circulation system provided in one embodiment of this application; Figure 7 A diagram showing the spray hole arrangement of the spray branch pipe in a spray circulation system provided in one embodiment of this application; Figure 8 This is a schematic diagram of a chemical foil preparation system provided in another embodiment of this application.

[0025] Explanation of reference numerals in the attached figures: 10. Formation tank; 20. Cleaning tank; 30. Heat circulation system; 40. Spray circulation system; 31. Main inlet pipe; 311. Branch inlet pipe; 312. Inlet valve; 32. Formation liquid circulation pump; 33. Outlet pipe; 331. Diverter pipe; 332. Diverter valve; 34. Heat exchange pipe; 341. Heat conduction pipe; 35. Main return pipe; 351. Branch return pipe; 352. Return valve; 352. Branch return pipe; 353. Diverter valve; 41. Spray inlet pipe; 411. First circulation valve; 42. Spray circulation pump; 43. Filter; 44. Main spray pipe; 441. Second circulation valve; 45. Spray branch pipe; 46. Spray hole; 47. Temperature probe; 48. Thermometer; 101. Primary formation tank; 102. Secondary formation tank; 103. Tertiary formation tank; 201. First cleaning tank; 300. P treatment tank; 202. Second cleaning tank; 104. Quaternary formation tank; 203. Third cleaning tank; 400. Electric furnace; 500. Repair treatment tank; 204. Fourth cleaning tank; 600. Drying oven. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In this document, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0028] Furthermore, in this article, directional terms such as "upper" and "lower" are defined relative to the orientation of the structure as shown in the attached drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the structure.

[0029] Please see Figure 1 One embodiment of this application provides a chemically formed foil preparation system for chemically forming aluminum foil.

[0030] Specifically, the electrolytic foil preparation system includes an electrolytic tank 10 and a cleaning tank 20. The electrolytic tank 10 contains an electrolytic solution, and the cleaning tank 20 contains a cleaning solution. A thermal circulation system 30 is provided between the electrolytic tank 10 and the cleaning tank 20.

[0031] Combination Figure 1 In this application, the thermal circulation system 30 includes an inlet main pipe 31, a formation liquid circulation pump 32, an outlet pipe 33, a heat exchange pipe 34, and a return main pipe 35. The formation liquid circulation pump 32 is disposed between the formation tank 10 and the cleaning tank 20. One end of the inlet main pipe 31 is connected to the bottom of the formation tank 10, and the other end of the inlet main pipe 31 is connected to the inlet of the formation liquid circulation pump 32. One end of the outlet pipe 33 is connected to the outlet of the formation liquid circulation pump 32, and the other end of the outlet pipe 33 is connected to one end of the heat exchange pipe 34. The heat exchange pipe 34 is disposed inside the cleaning tank 20 and immersed in the cleaning liquid. The other end of the heat exchange pipe 34 is connected to one end of the return main pipe 35, and the other end of the return main pipe 35 is connected to the upper part of the formation tank 10.

[0032] During the formation of the foil, the formation tank 10 is typically in a high-temperature electrochemical reaction state above 70°C. Furthermore, the applied electric field continuously generates heat during the formation process. To ensure the stable progress of the reaction, the temperature of the formation solution must be stably controlled.

[0033] This application utilizes a high-temperature formation liquid to transfer a portion of its heat to the cleaning tank 20 via a thermal circulation system 30, thereby raising the temperature of the cleaning solution within the cleaning tank 20. Typically, the volume of the cleaning tank 20 is much smaller than that of the formation tank 10; therefore, by transferring only a portion of the heat from the formation liquid in the formation tank 10 to the cleaning tank 20, the temperature of the cleaning solution can be significantly increased, achieving the effect of inhibiting microbial growth.

[0034] Based on the above scheme, the chemically formed foil preparation system of this application can be used in the chemical formation process of multiple chemically formed tanks 10 and multiple cleaning tanks 20.

[0035] Combination Figure 2 As shown, in another embodiment, the electroforming foil preparation system includes a plurality of electroforming tanks 10 and a plurality of cleaning tanks 20; each electroforming tank 10 contains an electroforming liquid, each cleaning tank 20 contains a cleaning liquid, and each cleaning tank 20 is provided with a heat exchange tube 34 inside.

[0036] Specifically, the heat circulation system 30 also includes several inlet branch pipes 311, several branch pipes 331, several return branch pipes 351, and several return branch pipes 352; one end of each inlet branch pipe 311 is connected to the bottom of a corresponding formation tank 10, and the other end is connected to the main inlet pipe 31; one end of each branch pipe 331 is connected to the outlet pipe 33, and the other end is connected to the heat exchange pipe 34 of a corresponding cleaning tank 20; one end of each return branch pipe 351 is connected to the heat exchange pipe 34 of a corresponding cleaning tank 20, and the other end is connected to the main return pipe 35; one end of each return branch pipe 352 is connected to the main return pipe 35, and the other end is connected to the upper part of a corresponding formation tank 10.

[0037] By transferring heat from the formation liquid in multiple formation tanks 10 to multiple cleaning tanks 20 through a heat circulation system 30, the temperature of each formation tank 10 can be controlled, and the problem that the heat of a single formation tank 10 cannot meet the heating requirements of the cleaning liquid in the cleaning tank 20 can be avoided.

[0038] Combination Figure 2 In order to facilitate flexible control of the heat circulation route, each inlet branch pipe 311 is equipped with an inlet valve 312, each branch pipe 331 is equipped with a branch valve 332, each return branch pipe 351 is equipped with a return valve 352, and each return branch pipe 352 is equipped with a branch valve 353.

[0039] Specifically, the inlet valve 312, the diverter valve 332, the return valve 352, or the branch valve 353 can be either manual or electric, depending on the requirements.

[0040] Combination Figure 3 As shown, in one embodiment, the heat exchange tube 34 includes a plurality of heat conduction tubes 341, with liquid flowing inside each heat conduction tube 341, and the heat conduction tubes 341 are connected in series. The series connection of the heat conduction tubes 341 ensures smooth flow and facilitates processing and installation.

[0041] Combination Figure 4 As shown, in another embodiment, the heat exchange tube 34 includes several heat conduction tubes 341, with the liquid flowing inside each heat conduction tube 341, and all heat conduction tubes 341 are connected in parallel. The parallel connection of the heat conduction tubes 341 ensures that the temperature of each heat conduction tube 341 is consistent, resulting in a more uniform temperature rise of the cleaning liquid at different depths within the cleaning tank 20.

[0042] Specifically, the heat exchange tube 34 can be installed on the inner wall of the cleaning tank 20.

[0043] In this application, the heat conduction tube 341 can be made of a material with good thermal conductivity, such as copper tube, stainless steel tube, etc.

[0044] Combination Figures 5 to 7As shown, in order to achieve a better cleaning effect and prevent moss and impurities from adhering to the surface of the electrolytic foil, in one embodiment of the electrolytic foil preparation system, each cleaning tank 20 is equipped with a spray circulation system 40. The spray circulation system 40 includes a spray inlet pipe 41, a spray circulation pump 42, a filter 43, a spray main pipe 44, and several spray branch pipes 45. One end of the spray inlet pipe 41 is connected to the bottom of the cleaning tank 20, and the other end of the spray inlet pipe 41 is connected to the liquid inlet of the spray circulation pump 42. The liquid outlet of the spray circulation pump 42 is connected to the filter inlet of the filter 43, and the filter outlet of the filter 43 is connected to one end of the spray main pipe 44. The ends of the spray main pipe 44 are connected side by side to the spray branch pipes 45, and each spray branch pipe 45 is provided with several spray holes 46.

[0045] Combination Figure 5 As shown, the spray inlet pipe 41 is equipped with a first circulation valve 411, and the spray main pipe 44 is equipped with a second circulation valve 441. The first circulation valve 411 and the second circulation valve 441 facilitate the control of the spray volume and spray intensity.

[0046] Combination Figure 5 As shown, in order to facilitate real-time monitoring of the temperature of the cleaning tank 20, a temperature probe 47 is installed inside the cleaning tank 20. The temperature probe 47 is immersed in the cleaning liquid and is electrically connected to a temperature gauge 48.

[0047] Specifically, the temperature probe 47 and the temperature gauge 48 can be existing commercially available products.

[0048] Combination Figure 5 As shown, spray branch pipes 45 are arranged in pairs on the opposite surfaces of the aluminum foil immersed in the cleaning tank 20.

[0049] By placing a pair of spray branches 45 on both surfaces of the formed foil, both foil surfaces can be sprayed and rinsed.

[0050] In this application, spray holes 46 are equidistantly opened on the spray branch pipe 45. Depending on the spraying needs, the spray holes 46 can be tilted upwards or downwards to achieve spray cleaning of the surface of the chemically formed foil.

[0051] Combination Figure 8 As shown, based on the above implementation scheme, in one embodiment, a chemically formed foil preparation system for high-quality chemically formed aluminum foil is provided.

[0052] Specifically, the electrolytic foil preparation system includes, in sequence: The primary formation tank 101, the secondary formation tank 102, and the tertiary formation tank 103 are arranged in succession, and each of the primary formation tank 101, the secondary formation tank 102, and the tertiary formation tank 103 contains a formation liquid; The first cleaning tank 201 contains cleaning fluid; P treatment tank 300 contains phosphoric acid treatment solution; The second cleaning tank 202 contains cleaning fluid; The four-stage formation tank 104 contains a formation liquid; The third cleaning tank 203 contains cleaning fluid; Electric furnace 400, electric furnace 400 is used for heat treatment; Repair treatment tank 500 contains repair treatment fluid; The fourth cleaning tank 204 contains cleaning fluid; Drying oven 600 is used for drying processes; A thermal circulation system is provided between the primary formation tank 101, the secondary formation tank 102 and the tertiary formation tank 103 and the first cleaning tank 201, the second cleaning tank 202, the third cleaning tank 203 and the fourth cleaning tank 204.

[0053] In this embodiment, aluminum foil is formed by a continuous three-stage forming tank 103. The heat circulation system transfers the heat energy of the continuous three-stage forming tank 103 to the cleaning tanks of each process segment to inhibit the growth of microorganisms in each cleaning tank and prevent the formation of moss, thereby saving energy, improving the quality of the formed foil, and reducing the formation of defective products.

[0054] This application has at least one of the following advantages: (1) Use chemical solution to indirectly heat the cleaning solution in the cleaning tank to inhibit the growth of organic matter; (2) The cleaning tank is equipped with heat conduction pipes for the flow of chemical liquid to improve heating efficiency; (3) Use each valve to control the opening and closing, and control the flow rate of the chemical solution to control the temperature of the cleaning tank; (4) Install a filter to filter the cleaning solution in the cleaning tank to clean the cleaning water.

[0055] The solutions provided by the embodiments of this application have been described in detail above. Specific embodiments have been used to explain the principles and implementation methods of this application. The above description is only for the purpose of helping to understand the methods and core mechanisms of this application. At the same time, for those skilled in the art, there will be changes in specific embodiments and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A chemically formed foil preparation system for chemically forming aluminum foil, characterized in that, The electroforming foil preparation system includes an electroforming tank and a cleaning tank. The electroforming tank contains an electroforming solution, and the cleaning tank contains a cleaning solution. A thermal circulation system is provided between the electroforming tank and the cleaning tank. The thermal circulation system includes an inlet main pipe, a formation liquid circulation pump, an outlet pipe, a heat exchange pipe, and a return main pipe. The formation liquid circulation pump is located between the formation tank and the cleaning tank. One end of the inlet main pipe is connected to the bottom of the formation tank, and the other end of the inlet main pipe is connected to the inlet of the formation liquid circulation pump. One end of the outlet pipe is connected to the outlet of the formation liquid circulation pump, and the other end of the outlet pipe is connected to one end of the heat exchange pipe. The heat exchange pipe is located inside the cleaning tank and is immersed in the cleaning liquid. The other end of the heat exchange pipe is connected to one end of the return main pipe, and the other end of the return main pipe is connected to the upper part of the formation tank.

2. The foil preparation system according to claim 1, characterized in that: The heat exchange tube includes several heat conduction tubes, and the heat conduction tubes are supplied with liquid for circulation. The heat conduction tubes are connected in series.

3. The foil preparation system according to claim 1, characterized in that: The heat exchange tube includes several heat conduction tubes, and the heat conduction tubes are supplied with liquid for circulation. The heat conduction tubes are connected in parallel.

4. The foil preparation system according to claim 2 or 3, characterized in that: The electroforming foil preparation system includes several electroforming tanks and several cleaning tanks; each electroforming tank contains an electroforming liquid, each cleaning tank contains a cleaning liquid, and each cleaning tank is equipped with a heat exchange tube. The heat circulation system further includes several inlet branch pipes, several branch pipes, several return branch pipes, and several return branch pipes; one end of each inlet branch pipe is connected to the bottom of a corresponding formation tank, and the other end is connected to the main inlet pipe; one end of each branch pipe is connected to the outlet pipe, and the other end is connected to the heat exchange pipe of a corresponding cleaning tank; one end of each return branch pipe is connected to the heat exchange pipe of a corresponding cleaning tank, and the other end is connected to the main return pipe; one end of each return branch pipe is connected to the main return pipe, and the other end is connected to the upper part of a corresponding formation tank.

5. The electroforming foil preparation system according to claim 4, characterized in that: Each of the inlet branch pipes is equipped with an inlet valve, each of the branch pipes is equipped with a branch valve, each of the return branch pipes is equipped with a return valve, and each of the return branch pipes is equipped with a branch valve.

6. The electroforming foil preparation system according to claim 5, characterized in that: Each of the aforementioned cleaning tanks is equipped with a spray circulation system, which includes a spray inlet pipe, a spray circulation pump, a filter, a main spray pipe, and several spray branch pipes. One end of the spray inlet pipe is connected to the bottom of the cleaning tank, and the other end of the spray inlet pipe is connected to the inlet of the spray circulation pump. The outlet of the spray circulation pump is connected to the filter inlet, and the filter outlet is connected to one end of the main spray pipe. The spray branch pipes are arranged side by side at the end of the main spray pipe, and each spray branch pipe is provided with several spray holes.

7. The electroforming foil preparation system according to claim 6, characterized in that: The spray inlet pipe is equipped with a first circulation valve, and the spray main pipe is equipped with a second circulation valve.

8. The foil preparation system according to claim 6, characterized in that: A temperature probe is installed inside the cleaning tank. The temperature probe is immersed in the cleaning solution and is electrically connected to a thermometer.

9. The electroforming foil preparation system according to claim 6, characterized in that: The spray branch pipes are arranged in pairs on the opposite surfaces of the aluminum foil immersed in the cleaning tank.

10. The foil preparation system according to claim 6, characterized in that: The foil preparation system comprises, in sequence: A primary formation tank, a secondary formation tank, and a tertiary formation tank are arranged in succession, each containing a formation liquid; A first cleaning tank, the first cleaning tank containing cleaning fluid; P-treatment tank, wherein the P-treatment tank contains phosphoric acid treatment solution; The second cleaning tank contains cleaning fluid; A four-stage formation tank, wherein the four-stage formation tank contains a formation liquid; The third cleaning tank contains cleaning fluid; An electric furnace used for heat treatment; A repair treatment tank, wherein the repair treatment tank contains a repair treatment solution; The fourth cleaning tank contains cleaning fluid; A drying oven, used for drying processes; The thermal circulation system is provided between the primary formation tank, the secondary formation tank, and the tertiary formation tank and the first cleaning tank, the second cleaning tank, the third cleaning tank, and the fourth cleaning tank.

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