Six-level forming method of medium and high voltage aluminum electrolytic capacitor anode foil

An aluminum electrolytic capacitor and the technology of the formation method, which are applied in the direction of capacitor electrodes, capacitor parts, and metal surface removal regulations, can solve the problems of low capacity and low bending strength of the formed foil, and achieve small volume, high bending strength, long life effect

Inactive Publication Date: 2013-07-03
YINGJING XUGUANG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The formed foil produced by this method has low capacity and low bending strength, which cannot meet the current requirements of small volume, high capacity and long life of capacitors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Put the aluminum foil after electrolytic corrosion treatment through the aluminum feeding roller and put it in the pure water with the temperature of 96°C, the conductivity of 9μs and the pH of 5 for 10 minutes, take it out, wash it, and put it in a place containing 0.2% phosphate, 0.3 % citric acid electrolyte in the primary chemical tank, at 85°C, 106V, 25mA / cm 2 Under the condition of 8 minutes, the primary chemical aluminum foil is obtained; take it out and wash it, and put it in the secondary chemical chemical tank containing the electrolyte solution of 0.1% phosphate, 0.2% citric acid and 0.1% azelaic acid salt, at 85 ℃ , 159V, 25mA / cm 2 Under the conditions of 4 minutes, the secondary chemical aluminum foil is obtained; take it out and wash it, and put it in the tertiary chemical compound containing 0.05% phosphomolybdate, 0.2% citric acid, 0.3% adipate, 2% boric acid electrolyte In the tank, at 85°C, 370V, 25mA / cm 2 Under the condition of 8 minutes, the three-...

Embodiment 2

[0032] After the electrolytic corrosion treatment, the aluminum foil is placed in pure water with a temperature of 95°C, a conductivity of 7 μs, and a pH of 6 for 5 minutes after passing through an aluminum feed roller. % citric acid electrolyte in the primary chemical tank, at 80°C, 100V, 20mA / cm 2 Under the condition of 15 minutes, the primary aluminum foil is obtained; take it out and wash it, and put it in the secondary chemical formation tank containing the electrolyte solution of 0.3% phosphate, 0.4% citric acid and 0.3% azelaic acid salt, at 80 ℃ , 130V, 20mA / cm 2 Under the conditions of 15 minutes, the secondary chemical aluminum foil is obtained; take it out and wash it, and put it in the tertiary chemical compound containing 0.1% phosphomolybdate, 0.3% citric acid, 0.6% adipate, 4% boric acid electrolyte In the tank, at 80°C, 300V, 20mA / cm 2 Under the condition of 13 minutes, the third-grade aluminum foil is obtained; take it out and wash it, put it into a liquid f...

Embodiment 3

[0034] After the electrolytic corrosion treatment, the aluminum foil was placed in pure water with a temperature of 98 °C, a conductivity of 6 μs, and a pH of 5.5 for 15 minutes after passing through an aluminum feed roller. % citric acid electrolyte in the primary chemical tank, at 100°C, 110V, 50mA / cm 2 Under the condition of 10 minutes, the first-grade aluminum foil is obtained; take it out and wash it, and put it in the secondary formation tank containing the electrolyte solution of 1% phosphate, 1% citric acid and 1% azelaic acid salt, at 100 ℃, 250V, 50mA / cm 2 Under the conditions of 13 minutes, the secondary chemical aluminum foil is obtained; take it out and wash it, and place it in the tertiary chemical compound containing 1% phosphomolybdate, 1% citric acid, 1% adipate, and 10% boric acid electrolyte In the tank, at 100°C, 400V, 50mA / cm 2 Under the condition of 10 minutes, the third-grade aluminum foil is obtained; take it out and wash it, put it into the liquid fe...

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PUM

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Abstract

The invention discloses a six-level forming method of a medium and high voltage aluminum electrolytic capacitor anode foil. The six-level forming method comprises the main steps of carrying out high-temperature water treatment on an aluminum foil after electrolytic corrosion treatment after the aluminum foil passes through an aluminum feeder roller, carrying out first-level, second-level and third-level forming, and sequentially carrying out four-level, five-level and six-level forming after liquid feeding, wherein only one forming groove is used in the previous five levels of forming process, five forming grooves are used in the six-th level of forming process, and the three forming grooves in the middle are connected in series. The anode foil prepared by the method is high in capacity and high in bending strength. Compared with the film formed in the prior art, the film formed by using the six-level forming method has the advantages that quality is greatly improved; and the demands of the existing electrolytic capacitor on small size, high capacity and long service life are completely met.

Description

technical field [0001] The invention relates to the manufacturing technology of the anode foil of the medium and high voltage aluminum electrolytic capacitor, in particular to a method for preparing the anode foil of the medium and high voltage aluminum electrolytic capacitor by adopting a six-stage chemical formation method. Background technique [0002] At present, the five-stage forming method of medium and high-voltage forming foil is as follows: the aluminum foil after electrolytic corrosion treatment is treated in pure water at 92-100°C for 5-15 minutes after passing through the aluminum feed roller, and then placed in a place containing 0.1-1 In the aqueous solution of % adipic acid and 0.1-1% adipic acid salt, under the conditions of 70~98℃, voltage 0~150V, and current density 0~50mA, it is formed for 4~15 minutes, and then enters the first stage after washing with pure water. A feed tank, after washing with water, put it in the second electrolytic tank containing 0....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G13/06H01G9/04
Inventor 李刚李军周毅刘勇
Owner YINGJING XUGUANG ELECTRONICS
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