Hydration treatment method for medium-high pressure formed foil production

Abstract

The invention discloses a hydration treatment method for medium-high pressure formed foil production in the technical field of formed foil production, which comprises the following steps: S1, water boiling treatment: carrying out liquid level lifting treatment on pure water in a water boiling tank; s2, spraying treatment, wherein after the liquid level is lowered, the foil surface is subjected to spraying treatment; s3, heat preservation treatment: carrying out heat preservation treatment on the discharged pure water; s4, filtering treatment: filtering the heat-preserved pure water when the pure water is pumped back to the water boiling tank; in the hydration treatment process of the formed foil, the defect that the foil surface of the pure water is widened after the vehicle speed is reduced is overcome, and the problem that the foil surface of the high-voltage electrode foil is widened due to speed reduction and load reduction during power peak-avoiding production is remarkably solved by adjusting the soaking height of the pure water in the water boiling tank and adjusting the operation time of the etched foil in the water boiling tank.

Description

Technical Field

[0001] This invention relates to the field of electrolytic foil production technology, and more particularly to a hydration treatment method for the production of medium and high voltage electrolytic foil. Background Technology

[0002] Capacitors serve as filters, couplers, and energy storage devices in electronic circuits, making them an irreplaceable fundamental component in various electronic products and widely used across different fields. Aluminum-plated foil is a commonly used electrode material for capacitors. As the anode of the capacitor, the performance of the aluminum-plated foil largely determines the performance of the capacitor and is a key factor to consider in the design, production, and application of capacitors.

[0003] The production of electrolytic foil requires a continuous and stable load, with a stable operating speed and a stable applied voltage. To maintain production quality, reducing the production load necessitates reducing the operating speed, which in turn reduces the load. However, reducing the speed can lead to defects in the electrolytic foil, such as wider foil surfaces, resulting in substandard products. Summary of the Invention

[0004] To overcome these shortcomings, the technical problem to be solved by this invention is: how to improve the defects generated on the foil surface during the electrolytic foil production process.

[0005] The technical solution adopted by this invention to solve its technical problem is: A hydration treatment method for the production of medium- and high-voltage electrolytic foil includes the following steps: S1: Boiling treatment, which involves raising and lowering the liquid level of pure water in the boiling tank; S2: Spray treatment, the foil surface is sprayed after the liquid level drops; S3: Thermal insulation treatment, the discharged pure water is thermally insulated; S4: Filtration treatment. The insulated pure water is filtered when it is returned to the boiling tank.

[0006] Furthermore, in step S1, the temperature of the pure water used for boiling treatment is greater than or equal to 92°C.

[0007] Furthermore, in step S1, the liquid level raising and lowering process is as follows: after the pure water initially corrodes the foil for a preset time, the liquid level is lowered to half of the initial liquid level and then run for another preset time.

[0008] Furthermore, the preset running time for the pure water initial liquid level corrosion foil is 8-12 minutes, and then the speed is reduced by half and it runs for another 16-24 minutes.

[0009] Furthermore, step S1 also includes adjusting the tension in the boiling tank. The adjustment process includes: detecting the tension of the pure water in the boiling tank in real time using a tension sensor, and adjusting the height position of the bottom roller hanger structure in the boiling tank according to the real-time tension data.

[0010] Furthermore, the aforementioned bottom roller hanger structure includes a vertical guide groove disposed within the aforementioned boiling tank, a hanger body slidably disposed within the guide groove, and the hanger body employs an electric lifting structure to achieve lifting and adjustment.

[0011] Furthermore, the aforementioned tension sensor is installed on the passive rollers before and after the boiling tank, and a controller is also included. The aforementioned tension sensor and the aforementioned electric lifting structure are both electrically connected to the aforementioned controller.

[0012] Furthermore, the tension adjustment process specifically includes: measuring the foil width after boiling; measuring the foil width after the production line speed is reduced by half; measuring the foil width after the bottom roller hanger is raised by half after the production line speed is reduced by half; and measuring the foil width after the speed is restored and the hanger is lowered.

[0013] Furthermore, in steps S1-S4, a stainless steel tank is installed outside the boiling tank. The stainless steel tank is equipped with an insulation layer, a heating structure, and a temperature control structure. During the liquid level adjustment process, pure water from the boiling tank is pumped into the stainless steel tank. The insulation layer, heating structure, and temperature control structure keep the pure water at a preset temperature.

[0014] Furthermore, in step S4, a pump body is installed in the stainless steel tank. The pump body is used to pump the pure water in the stainless steel tank back into the boiling water tank. The stainless steel tank is equipped with a filter.

[0015] The beneficial effects of this invention are: During the hydration process of the electrolytic foil, the corrosion foil will exhibit a defect of widening after the vehicle speed is reduced. In this application, by adjusting the immersion height of pure water in the boiling tank and adjusting the running time of the corrosion foil in the boiling tank, the problem of foil widening caused by speed reduction and load reduction during peak power production of high voltage electrode foil is significantly reduced.

[0016] When the pure water level in the boiling tank drops, the corroded foil is exposed to the air and will break if it is not cooled down. Therefore, a spray system is needed to keep the foil surface moist. The discharged pure water needs to be kept at a preset temperature so that it can be returned to raise the water level in the boiling tank at any time. When the discharged pure water is returned to the boiling tank, it needs to be kept clean and free of impurities, so a bag filter needs to be installed for filtration.

[0017] By adjusting the immersion height of the bottom roller hanger in the boiling tank and adjusting the running time of the etched foil in the boiling tank, the foil surface defects caused by the reduction in speed and load during peak power production of high-voltage electrode foil were significantly reduced. Attached Figure Description

[0018] Figure 1 This is a process flow diagram of the present invention; Detailed Implementation

[0019] The invention will be further described below with reference to the accompanying drawings.

[0020] like Figure 1 As shown in the embodiments of this application, a hydration treatment method for the production of medium- and high-voltage electrolytic foil is proposed, including the following steps: S1: Boiling treatment, which involves raising and lowering the liquid level of pure water in the boiling tank; The temperature of the pure water used in the boiling process is greater than or equal to 92°C. The liquid level adjustment process is as follows: after the pure water initially corrodes the foil for a preset time, the liquid level is reduced to half of the initial liquid level and then run for another preset time. The preset time for the pure water initially corrodes the foil is 8-12 minutes, and then the speed is reduced by half and the process continues for 16-24 minutes. Specifically, in this embodiment, the pure water in the boiling tank must be kept above 92°C during production. The pure water level in the boiling tank cannot be adjusted, and the running time of the corroded foil in the boiling tank is fixed at 10 minutes. After the speed is reduced by half, the running time of the corroded foil in the boiling tank increases to 20 minutes, resulting in a wider foil surface. Therefore, the liquid level of the 92°C pure water needs to be reduced to decrease the boiling time of the corroded foil.

[0021] To further improve the foil surface defect problem, the process also includes adjusting the tension in the boiling tank. The specific adjustment process includes: real-time detection of the tension of the pure water in the boiling tank using a tension sensor, and adjusting the height of the bottom roller bracket structure in the boiling tank based on the real-time tension data. In this embodiment, the tension adjustment process specifically includes: measuring the foil width after boiling; measuring the foil width after the production line speed is reduced by half; measuring the foil width after the bottom roller bracket is raised by half after the production line speed is reduced by half; and measuring the foil width again after the speed recovers. Specifically, the etching foil running time in the boiling tank is fixed at 10 minutes. After the speed is reduced by half, the etching foil's running time in the boiling tank increases to 20 minutes, causing the foil surface to widen. When the production line speed is reduced, the bottom roller bracket is raised to reduce the etching foil's running time in the boiling tank, maintaining a normal boiling time and preventing the etching foil from widening. When the production line speed recovers, the bottom roller bracket is lowered to maintain a normal boiling time for the etching foil. This effectively improves the foil surface defect problem.

[0022] Specifically, the aforementioned bottom roller hanger structure includes a vertical guide groove disposed within the aforementioned boiling tank, a hanger body slidably disposed within the guide groove, and the hanger body employs an electric lifting structure to achieve lifting adjustment; the aforementioned tension sensor is disposed on the passive rollers before and after the boiling tank, and the structure also includes a controller, with the aforementioned tension sensor and the aforementioned electric lifting structure both electrically connected to the aforementioned controller.

[0023] When the bottom roller bracket of the boiling tank is raised and lowered, the tension in front of and behind the boiling tank will be affected, which may easily lead to foil breakage. It is necessary to slow down the movement of the corroded foil at the front of the boiling tank when raising the bracket; while when lowering the bottom roller bracket, it is necessary to slow down the movement of the foil at the rear of the boiling tank in order to maintain normal production tension. Therefore, tension sensors need to be installed in front of and behind the boiling tank to adjust the tension control in front of and behind the boiling tank in real time according to the changes in tension.

[0024] A stainless steel tank is installed on the outside of the boiling tank. The stainless steel tank is equipped with an insulation layer, a heating structure and a temperature control structure. During the liquid level adjustment process, pure water from the boiling tank is pumped into the stainless steel tank. The insulation layer, heating structure and temperature control structure keep the pure water at the preset temperature.

[0025] S2: Spray treatment. After the liquid level is reduced, the foil surface is sprayed. After the pure water level in the boiling tank is reduced, the corrosion foil is exposed to the air. Since the corrosion foil passes through a 2000A current during operation, it will break if it is not cooled down. Therefore, a spray system is required to keep the foil surface moist.

[0026] S3: Insulation treatment, the discharged pure water is insulated; the discharged pure water needs to be kept at 92℃ so that it can be returned at any time to increase the liquid level of the boiling tank.

[0027] S4: Filtration treatment. The insulated pure water is filtered before being returned to the boiling tank. The discharged pure water must be kept clean and free of impurities when returned to the boiling tank, so a bag filter must be installed for filtration.

[0028] A pump body is installed in the stainless steel tank, which is used to pump the pure water in the stainless steel tank back into the boiling water tank. The stainless steel tank is equipped with a filter.

[0029] Example 1 Boiling treatment: The pre-treated aluminum foil is boiled in pure water at 93℃ for 10 minutes; the foil width is measured after boiling; the foil width is measured again after the production line speed is reduced by half; the foil width is measured again after the pure water level is reduced to half after the production line speed is reduced by half; the foil width is measured again after the speed is restored and the foil is returned to 92℃ pure water.

[0030] Compared with existing technologies, the foil produced by this invention significantly reduces the problem of foil widening caused by speed reduction and load reduction in power peak shaving production.

[0031] In summary, this invention significantly reduces the problem of foil widening caused by reduced speed and load during peak-shaving production of high-voltage electrode foils by adjusting the immersion height of the pure water in the boiling tank and thus the running time of the etched foil in the tank, while ensuring other properties of the high-voltage formed foil. This method is applicable not only to high-voltage formed foils but also to medium-voltage formed foils.

[0032] Example 2 Boiling treatment: The pre-treated aluminum foil is boiled in pure water at 93℃ for 10 minutes; the width of the aluminum foil is measured after boiling; the foil width is measured after the production line speed is reduced by half; the foil width is measured after the bottom roller hanger is raised by half after the production line speed is reduced by half; the foil width is measured after the speed is restored and the hanger is lowered.

[0033] Compared with existing technologies, the foil produced by this invention significantly reduces the problem of foil widening caused by speed reduction and load reduction in power peak shaving production.

[0034] In summary, this invention significantly reduces the problem of foil widening caused by reduced speed and load during peak-shaving production of high-voltage electrode foil by adjusting the immersion height of the bottom roller hanger in the boiling tank and thus the running time of the etched foil in the boiling tank, while ensuring other properties of the high-voltage formed foil. This method is applicable not only to high-voltage formed foil but also to medium-voltage formed foil.

Claims

1. A hydration treatment method for the production of medium- and high-voltage electrolytic foil, characterized in that, Includes the following steps, S1: Boiling treatment, which involves raising and lowering the liquid level of pure water in the boiling tank; S2: Spray treatment, the foil surface is sprayed after the liquid level drops; S3: Thermal insulation treatment, the discharged pure water is thermally insulated; S4: Filtration treatment. The insulated pure water is filtered when it is returned to the boiling tank.

2. The hydration treatment method for producing medium- and high-voltage electrolytic foil according to claim 1, characterized in that, In step S1, the temperature of the pure water used for boiling treatment is greater than or equal to 92°C.

3. The hydration treatment method for producing medium- and high-voltage electrolytic foil according to claim 2, characterized in that, In step S1, the liquid level rise and fall process is as follows: after the pure water initial liquid level corrosion foil runs for a preset time, the liquid level is lowered to half of the initial liquid level and then runs for another preset time.

4. The hydration treatment method for producing medium- and high-voltage electrolytic foil according to claim 3, characterized in that, The preset running time for the pure water initial liquid level corrosion foil is 8-12 minutes, and then the speed is reduced by half and it runs for another 16-24 minutes.

5. The hydration treatment method for producing medium- and high-voltage electrolytic foil according to claim 1, characterized in that, Step S1 also includes adjusting the tension in the boiling tank. The adjustment process includes: detecting the tension of the pure water in the boiling tank in real time using a tension sensor, and adjusting the height position of the bottom roller hanger structure in the boiling tank according to the real-time tension data.

6. The hydration treatment method for producing medium- and high-voltage electrolytic foil according to claim 5, characterized in that, The bottom roller hanger structure includes a vertical guide groove located inside the boiling tank, a hanger body slidably disposed within the guide groove, and the hanger body employs an electric lifting structure to achieve lifting and adjustment.

7. The hydration treatment method for producing medium- and high-voltage electrolytic foil according to claim 6, characterized in that, The tension sensor is installed on the passive rollers before and after the boiling tank, and the system also includes a controller. Both the tension sensor and the electric lifting structure are electrically connected to the controller.

8. The hydration treatment method for producing medium- and high-voltage electrolytic foil according to claim 5, characterized in that, The tension adjustment process specifically includes: measuring the foil width after boiling; measuring the foil width after the production line speed is reduced by half; measuring the foil width after the bottom roller hanger is raised by half after the production line speed is reduced by half; and measuring the foil width after the speed is restored and the hanger is lowered.

9. The hydration treatment method for producing medium- and high-voltage electrolytic foil according to claim 1, characterized in that, In steps S1-S4, a stainless steel tank is installed outside the boiling tank. The stainless steel tank is equipped with an insulation layer, a heating structure, and a temperature control structure. During the liquid level adjustment process, pure water from the boiling tank is pumped into the stainless steel tank. The insulation layer, heating structure, and temperature control structure keep the pure water at a preset temperature.

10. The hydration treatment method for producing medium- and high-voltage electrolytic foil according to claim 9, characterized in that, In step S4, a pump body is installed in the stainless steel tank. The pump body is used to pump the pure water in the stainless steel tank back into the boiling water tank. A filter is installed in the stainless steel tank.

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