Aluminum foil preparation system for frequency converter capacitor

Abstract

The utility model provides an aluminum foil preparation system for a frequency converter capacitor. The preparation system comprises a first-stage formation tank, a second-stage formation tank, a third-stage formation tank and a fourth-stage formation tank which are sequentially arranged, a first-stage pickling tank and a first cleaning tank are sequentially arranged between the third-stage formation tank and the fourth-stage formation tank, a phosphoric acid solution is contained in the first-stage pickling tank, and deionized water is contained in the first cleaning tank. The first-stage pickling tank is additionally arranged behind the third-stage formation tank, invalid corrosion holes in the surface of the formed foil can be cleaned, and therefore repair of the invalid corrosion holes in the rear-end formation is facilitated.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of capacitor aluminum foil preparation, in particular to an aluminum foil preparation system for a frequency converter capacitor. BACKGROUND

[0002] With the continuous development of modern science and technology, the frequency conversion technology is born to meet the needs of stepless speed regulation of alternating current motors. With the development of power electronic devices, the frequency conversion technology is also developing, and the aluminum electrolytic capacitor used in the frequency converter also has higher and higher performance requirements, especially the requirement for the wave resistance of the capacitor is getting higher and higher, which improves the performance requirements of the aluminum foil, a key accessory of the capacitor.

[0003] Therefore, it is an urgent problem for those skilled in the art to improve the performance of the aluminum foil to improve the wave resistance of the capacitor. CONTENT OF THE INVENTION

[0004] In order to overcome the defects of the prior art, the application provides an aluminum foil preparation system for a frequency converter capacitor, which can improve the invalid etching holes formed in the formation process of the aluminum foil, increase the surface capacity, and improve the performance of the aluminum foil.

[0005] Specifically, the preparation system comprises a first-stage formation tank, a second-stage formation tank, a third-stage formation tank and a fourth-stage formation tank arranged in sequence, a first-stage acid pickling tank and a first cleaning tank are arranged in sequence between the third-stage formation tank and the fourth-stage formation tank, the first-stage acid pickling tank contains a phosphoric acid solution inside, and the first cleaning tank contains deionized water inside.

[0006] In an alternative implementation, the first-stage formation tank, the second-stage formation tank, the third-stage formation tank and the fourth-stage formation tank all contain ammonium adipate formation liquid.

[0007] In an alternative implementation, the fourth-stage formation tank is sequentially provided with a second cleaning tank, a second-stage acid pickling tank and a fifth-stage formation tank at the rear end; the second-stage acid pickling tank contains a phosphoric acid solution inside, the second cleaning tank contains deionized water inside, and the fifth-stage formation tank contains ammonium adipate formation liquid inside.

[0008] In an alternative implementation, the fifth-stage formation tank is sequentially provided with a third cleaning tank and a high-temperature calcination oven at the rear end, and the third cleaning tank contains deionized water inside.

[0009] In an alternative implementation, the high-temperature calcination oven is sequentially provided with a repair tank and a drying oven at the rear end, and the repair tank contains a phosphoric acid solution inside.

[0010] According to the technical solutions provided by the foregoing implementation, at least the following beneficial effects are achieved:

[0011] (1) The application can clean the invalid etching holes on the surface of the formed foil by adding a stage of acid washing tank after three stages of forming tank, so as to facilitate the repair of the invalid etching holes in the later end.

[0012] (2) The application can clean the aluminum foil through the first stage of acid washing tank and the second stage of acid washing tank, so as to effectively remove the impurities blocking the etching holes on the surface of the formed aluminum foil, and the etching holes after removing the impurities can be repaired in the later end, thereby increasing the surface capacity.

[0013] (3) The formed aluminum foil prepared by the preparation system of the application has stable characteristics, small leakage current, high reliability and safety. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0015] Figure 1 The schematic diagram of the preparation system provided by an embodiment of the application is shown in the figure.

[0016] Figure 2 The schematic diagram of the preparation system provided by another embodiment of the application is shown in the figure.

[0017] Figure 3 The schematic diagram of the preparation system provided by another embodiment of the application is shown in the figure.

[0018] Explanation of reference signs:

[0019] 1, first stage of forming tank; 2, second stage of forming tank; 3, third stage of forming tank; 4, fourth stage of forming tank; 5, first stage of acid washing tank; 6, first cleaning tank; 7, second cleaning tank; 8, second stage of acid washing tank; 9, fifth stage of forming tank; 10, third cleaning tank; 11, high-temperature baking oven; 12, repair tank; 13, drying oven; 14, winding roller; 100, aluminum foil. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the application will be described clearly and completely in the following with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0021] The terms "first", "second", etc. are used herein only for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Thus, features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise stated.

[0022] In addition, herein, the orientation terms such as "upper", "lower", etc. are defined relative to the orientation of the structure shown in the drawings, and it should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and they can change accordingly according to the change of the orientation of the structure.

[0023] Please refer to Figure 1 An embodiment of the present application provides a preparation system of an aluminum foil 100 for frequency converter capacitor, which is used for preparing the aluminum foil 100 for frequency converter capacitor.

[0024] Specifically, the preparation system comprises a first formation tank 1, a second formation tank 2, a third formation tank 3 and a fourth formation tank 4 arranged in sequence, a first pickling tank 5 and a first cleaning tank 6 are arranged in sequence between the third formation tank 3 and the fourth formation tank 4, the first pickling tank 5 contains a phosphoric acid solution inside, and the first cleaning tank 6 contains deionized water inside.

[0025] By arranging the first pickling tank 5 between the third formation tank 3 and the fourth formation tank 4, the invalid etching holes on the surface of the formed aluminum foil 100 after the third formation can be cleaned, which is beneficial to the repair of the invalid etching holes in the subsequent formation process.

[0026] Among them, the first formation tank 1, the second formation tank 2, the third formation tank 3 and the fourth formation tank 4 all contain ammonium adipate formation liquid.

[0027] Specifically, the conductivity of the ammonium adipate formation liquid in the first formation tank 1, the second formation tank 2 and the third formation tank 3 is 100-120 ms / cm, and the conductivity of the ammonium adipate formation liquid in the fourth formation tank 4 is 90-100 ms / cm.

[0028] Combined Figure 2 As shown in another embodiment, in order to improve the capacity of the aluminum foil 100, a second cleaning tank 7, a second pickling tank 8 and a fifth formation tank 9 are sequentially arranged at the rear end of the fourth formation tank 4; the second pickling tank 8 contains a phosphoric acid solution inside, the second cleaning tank 7 contains deionized water inside, and the fifth formation tank 9 contains ammonium adipate formation liquid inside.

[0029] By arranging the second pickling tank 8, impurities blocking the etching holes on the surface of the formed aluminum foil 100 can be effectively removed, and after the impurities are removed, the etching holes can be repaired again at the rear end, thereby increasing the surface capacity.

[0030] The conductivity of the ammonium oxalate solution in the fifth formation tank 9 is 90-100 ms / cm.

[0031] In this embodiment, the conductivity of the phosphoric acid solution in the first pickling tank 5 is 19-20 ms / cm, and the conductivity of the phosphoric acid solution in the second pickling tank 8 is 25-28 ms / cm. The temperature of the phosphoric acid solution in the first pickling tank 5 and the second pickling tank 8 is 40±5℃.

[0032] In combination Figure 3 As shown in yet another embodiment, a third cleaning tank 10 and a high-temperature baking oven 11 are sequentially arranged at the rear end of the fifth formation tank 9, and the third cleaning tank 10 contains deionized water.

[0033] The first cleaning tank 6, the second cleaning tank 7, and the third cleaning tank 10 are used to clean the liquid attached to the surface of the aluminum foil 100 to avoid affecting the processing of the next process section.

[0034] The high-temperature baking oven 11 is used to heat treat the aluminum foil 100, which has an annealing effect and softens the surface of the aluminum foil 100.

[0035] In this embodiment, a repair tank 12 and a drying oven 13 are sequentially arranged at the rear end of the high-temperature baking oven, and the repair tank 12 contains a phosphoric acid solution.

[0036] The repair tank 12 is used to treat the aluminum foil 100, which can repair the formation film on the surface of the aluminum foil 100, improve the capacity, reduce the product leakage current, and improve the product life.

[0037] In order to facilitate the collection of the formed aluminum foil 100, the drying oven 13 is provided with a winding roller 14 at the rear end for collecting the aluminum foil 100.

[0038] The formed aluminum foil prepared by the system of the present application improves the hydration resistance of the aluminum foil, and the hydration time can be reduced from 30 seconds in the conventional process to 15 seconds, and the leakage current of the formed aluminum foil can be reduced from 2 μA to less than 0.5 μA. Moreover, the prepared capacitor capacity is stable, and the service life of the frequency converter capacitor is increased.

[0039] The technical solutions provided by the embodiments of the present application are described in detail above, and the principles and implementation modes of the present application are explained by using specific examples. The above description is only used to help understand the method of the present application and its core mechanism; at the same time, for those skilled in the art, according to the idea of the present application, the specific examples and application range will be changed, and the above description should not be understood as a limitation of the present application.

Claims

1. A system for producing an aluminum foil for an inverter capacitor, for producing an aluminum foil for an inverter capacitor, characterized by, The preparation system comprises a first-stage chemical conversion tank, a second-stage chemical conversion tank, a third-stage chemical conversion tank and a fourth-stage chemical conversion tank arranged in sequence, a first-stage acid pickling tank and a first cleaning tank are arranged in sequence between the third-stage chemical conversion tank and the fourth-stage chemical conversion tank, the first-stage acid pickling tank contains a phosphoric acid solution, and the first cleaning tank contains deionized water.

2. The aluminum foil production system for inverter capacitors according to claim 1, characterized by: The first-stage chemical conversion tank, the second-stage chemical conversion tank, the third-stage chemical conversion tank and the fourth-stage chemical conversion tank all contain ammonium adipate chemical conversion liquid.

3. The aluminum foil production system for inverter capacitors according to claim 2, characterized by: The fourth-stage chemical conversion tank is sequentially provided with a second cleaning tank, a second-stage acid pickling tank and a fifth-stage chemical conversion tank at the rear end; the second-stage acid pickling tank contains a phosphoric acid solution, the second cleaning tank contains deionized water, and the fifth-stage chemical conversion tank contains ammonium adipate chemical conversion liquid.

4. The aluminum foil production system for inverter capacitors according to claim 3, characterized by: The fifth-stage chemical conversion tank is sequentially provided with a third cleaning tank and a high-temperature calcination oven at the rear end, and the third cleaning tank contains deionized water.

5. The aluminum foil production system for inverter capacitors according to claim 4, characterized in that: The high-temperature calcination oven is sequentially provided with a repair tank and a drying furnace at the rear end, and the repair tank contains a phosphoric acid solution.

6. The system for producing aluminum foil for inverter capacitors according to claim 5, characterized in that: A winding roller for collecting aluminum foil is arranged at the rear end of the drying furnace.

7. The inverter capacitor-use aluminum foil manufacturing system according to claim 3, characterized by: The conductivity of the ammonium adipate chemical conversion liquid in the first-stage chemical conversion tank, the second-stage chemical conversion tank and the third-stage chemical conversion tank is 100-120 ms / cm, and the conductivity of the ammonium adipate chemical conversion liquid in the fourth-stage chemical conversion tank is 90-100 ms / cm.

8. The system for producing aluminum foil for inverter capacitors according to claim 7, characterized in that: The conductivity of the ammonium adipate chemical conversion liquid in the fifth-stage chemical conversion tank is 90-100 ms / cm.

9. The inverter capacitor-use aluminum foil manufacturing system according to claim 3, characterized by: The conductivity of the phosphoric acid solution in the first-stage acid pickling tank is 19-20 ms / cm, and the conductivity of the phosphoric acid solution in the second-stage acid pickling tank is 25-28 ms / cm.

10. The aluminum foil production system for inverter capacitors according to claim 9, characterized by: The temperature of the phosphoric acid solution in the first-stage acid pickling tank and the second-stage acid pickling tank is 40±5℃.

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