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Low and medium voltage electrode foil formation method for improving mechanical strength

A technology of mechanical strength and chemical formation method, which is applied in the direction of circuits, capacitors, electrolytic capacitors, etc., can solve the problems of prone to broken foil, broken foil, poor mechanical properties of electronic aluminum foil, etc., and achieve the effect of improving the pass rate and strong mechanical strength

Inactive Publication Date: 2019-04-16
宝兴县华锋储能材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The cutting step of the current electronic aluminum foil in the process of manufacturing electrolytic capacitors is often prone to foil breakage due to insufficient mechanical strength. In the winding step, deformation or breakage often occurs due to the poor mechanical properties of the electronic aluminum foil. The phenomenon of foil increases the production cost of the enterprise and also reduces the safety factor during production

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  • Low and medium voltage electrode foil formation method for improving mechanical strength

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Embodiment 1

[0041] This embodiment provides a low-medium voltage electrode foil formation method for improving mechanical strength, which is characterized in that it includes the following steps:

[0042] 1) raw material cleaning;

[0043] 2) chemical conversion treatment;

[0044] 3) Depolarization treatment;

[0045] 4) At least one annealing treatment;

[0046] 5) drying treatment.

[0047] Preferably, the cleaning of raw materials includes the steps of pickling, alkali washing and rinsing.

[0048] Preferably, the chemical conversion treatment includes:

[0049] A. Put the aluminum foil in adipic acid, ammonium adipate, ammonia water and sodium carbonate with a current density of 10-50mA / cm2, a voltage of 0.2-15V, a temperature of 50-90°C, and a mass ratio of 0.3-15%. , sodium bicarbonate, triammonium citrate, triethanolamine, sodium silicate, diammonium hydrogen phosphate or one or more of the solutions and take it after standing for 1-5 minutes;

[0050] B. Put the aluminum fo...

Embodiment 2

[0069] The present invention proposes a low-medium voltage electrode foil formation method with improved mechanical strength, which is characterized in that it comprises the following steps: 1) raw material cleaning;

[0070] 2) chemical conversion treatment;

[0071] 3) Depolarization treatment;

[0072] 4) Multiple annealing treatments;

[0073] 5) drying treatment.

[0074] The chemical conversion treatment described in this embodiment includes:

[0075] A. Put the aluminum foil in adipic acid, ammonium adipate, ammonia water and sodium carbonate with a current density of 10-50mA / cm2, a voltage of 0.2-15V, a temperature of 50-90°C, and a mass ratio of 0.3-15%. , sodium bicarbonate, triammonium citrate, triethanolamine, sodium silicate, diammonium hydrogen phosphate or one or more of the solutions and take after 1-5 minutes;

[0076] B. Put the aluminum foil in adipic acid, ammonium adipate, ammonia water, sodium carbonate, Place in one or several solutions of sodium bi...

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Abstract

The invention discloses a low and medium voltage electrode foil formationmethod for improving mechanical strength. Thelow and medium voltage electrode foil formation method comprises the following steps that (1) raw materials arecleaned; (2) formation treatment is carried out; (3) depolarization treatment is carried out; (4) drying treatment is carried out; (5) at least one annealing treatment iscarried out; (6) post-repair treatment is carried out; and (7) drying treatment is carried out. In particular, the low and medium voltage electrode foil formation method further carries out stress treatment on an aluminum foil before drying treatment is carried out, so that a processed low and medium voltage electrode foil has extremely high mechanical strength.

Description

technical field [0001] The invention relates to the technical field of production of low and medium voltage electrode foils, in particular to a method for forming low and medium voltage electrode foils with improved mechanical strength. Background technique [0002] With the continuous development of electrical products towards high performance, miniaturization and integration, high specific volume electrode foil has become one of the key links in the development of high-tech electrical products. The manufacture of high specific volume aluminum electrode foil mainly includes the electrochemical expansion corrosion of aluminum electrode foil and the growth of high-performance aluminum oxide film. In recent years, with the development of corrosion surface expansion technology, the high-pressure corrosion coefficient has been close to the theoretical value, and the dielectric constant of some valve metal oxides is higher than that of alumina. Such metal oxides are doped into th...

Claims

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Application Information

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IPC IPC(8): C25D11/10C25D11/12C25D11/18C25D11/20H01G9/045H01G9/055
Inventor 秦力陈宇峰王文宝陈志然欧永聪陈东荣刘勋
Owner 宝兴县华锋储能材料有限公司