Formation method of high ripple current resisting electrode foil

A formation method and ripple current technology, applied in electrolytic capacitors, circuits, capacitors, etc., can solve the problems of high current density required by the process, poor tolerance of large ripple current, low production efficiency, etc., to improve the formation efficiency and quality. , the effect of saving a lot of electric energy

Inactive Publication Date: 2017-10-24
新疆金泰新材料技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this manufacturing method of electrode foil, the process requires high current density, high energy consumption, and low production efficiency, and the electrode foil manufactured by the above manufacturing method has poor tolerance to large ripple current

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for forming an electrode foil resistant to large ripple currents, the specific implementation steps are as follows:

[0021] (1) Pretreatment: Put the corroded aluminum foil with a purity of 99.99wt% in pure water at a temperature of 98°C for 9 minutes, then depolarize the aluminum foil in 5wt% fumaric acid aqueous solution, fumaric acid The temperature of the acid aqueous solution is 79.9°C;

[0022] (2) One-stage chemical formation: immerse the pretreated aluminum foil in 5wt% ammonium dihydrogen phosphate aqueous solution, at 86°C, 10mA / cm 2 , Under the condition of 120V, the formation time is 6min;

[0023] (3) Secondary formation: the aluminum foil after primary formation is immersed in 3wt% ammonium dihydrogen phosphate aqueous solution, at 86°C, 10mA / cm 2 , Under the condition of 250V, the formation time is 6min;

[0024] (4) Tertiary formation: the aluminum foil after the secondary formation is immersed in 0.5wt% ammonium dihydrogen phosphate aqueous...

Embodiment 2

[0030] A method for forming an electrode foil resistant to large ripple currents, the specific implementation steps are as follows:

[0031] (1) Pretreatment: Put the corroded aluminum foil with a purity of 99.99wt% in pure water at a temperature of 97°C for 12 minutes, then depolarize the aluminum foil in 1wt% fumaric acid aqueous solution, fumaric acid The temperature of the acid solution is 70°C;

[0032] (2) One-stage chemical formation: immerse the pretreated aluminum foil in 4wt% ammonium dihydrogen phosphate aqueous solution at 85°C, 8mA / cm 2 , Under the condition of 120V, the formation time is 6min;

[0033] (3) Secondary formation: the aluminum foil after the primary formation is immersed in 2wt% ammonium dihydrogen phosphate aqueous solution, at 85°C, 8mA / cm 2 , Under the condition of 250V, the formation time is 6min;

[0034] (4) Tertiary formation: the aluminum foil after the secondary formation is immersed in 1wt% ammonium dihydrogen phosphate aqueous solution,...

Embodiment 3

[0040] A method for forming an electrode foil resistant to large ripple currents, the specific implementation steps are as follows:

[0041] (1) Pretreatment: Put the corroded aluminum foil with a purity of 99.99wt% in pure water at a temperature of 98°C for 10 minutes, and then depolarize the aluminum foil in 4wt% fumaric acid aqueous solution. The temperature of the acid solution is 80°C;

[0042] (2) One-stage chemical formation: immerse the pretreated aluminum foil in 4wt% ammonium dihydrogen phosphate aqueous solution, at 86°C, 9mA / cm 2 , Under the condition of 120V, the formation time is 6min;

[0043] (3) Secondary formation: the aluminum foil after primary formation is immersed in 3wt% ammonium dihydrogen phosphate aqueous solution, at 86°C, 9mA / cm 2 , Under the condition of 250V, the formation time is 6min;

[0044] (4) Tertiary formation: the aluminum foil after the secondary formation is immersed in 0.5wt% ammonium dihydrogen phosphate aqueous solution, at 86°C, ...

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PUM

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Abstract

The invention discloses a method for the formation of an electrode foil resistant to large ripple currents, including the first-level formation, the second-level formation, the third-level formation, the fourth-level formation and the five-level formation of the aluminum foil, wherein the first-level formation, the second-level formation Both the formation and the tertiary formation are carried out in an aqueous solution of ammonium dihydrogen phosphate, and the quaternary formation and the fifth formation of aluminum foil are carried out in an aqueous solution containing boric acid and ammonium pentaborate. The electrode foil manufactured by the method can withstand large ripple current and effectively improve the quality of the electrode foil.

Description

technical field [0001] The invention belongs to the field of electrode foil production, and in particular relates to a method for forming an electrode foil resistant to large ripple current. Background technique [0002] The current manufacturing method of the electrode foil for medium and high voltage aluminum electrolytic capacitors is as follows: immerse the corroded aluminum foil with a purity of 99.99wt% in pure water at 95-100°C for 10 minutes; take it out and place it in 0.1 In the aqueous solution of the adipic acid of wt% and the ammonium adipate of 2wt%, under the condition of 85 ℃, current density of 20mA / cm2, and voltage of 200v, the first-order conversion is 18min; then placed in 7wt% of boric acid and 0.4 In the aqueous solution of wt% ammonium pentaborate, under the conditions of 85°C, current density of 20mA / cm2, and voltage of 430v, secondary conversion was performed for 18min; then placed in the aqueous solution of 7wt% boric acid and 0.3wt% ammonium pentab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/12H01G9/055
CPCC25D11/12H01G9/055
Inventor 严民陈宇峰
Owner 新疆金泰新材料技术股份有限公司
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