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Method for preparing medium-and-high-voltage anode aluminum foil long and short hole special structure by double V hole corrosion

An anode aluminum foil, special structure technology, applied in the direction of electrical components, electrolytic capacitors, capacitors, etc., to achieve the effect of simple process flow, good effect, easy control and industrialized implementation

Active Publication Date: 2019-05-07
GUANGXI HEZHOU GUIDONG ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no literatures or patents on the production process of corrosion foil for special capacitors in China.

Method used

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  • Method for preparing medium-and-high-voltage anode aluminum foil long and short hole special structure by double V hole corrosion
  • Method for preparing medium-and-high-voltage anode aluminum foil long and short hole special structure by double V hole corrosion
  • Method for preparing medium-and-high-voltage anode aluminum foil long and short hole special structure by double V hole corrosion

Examples

Experimental program
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Embodiment 1

[0025] (1) Pretreatment: Soak the aluminum foil in a mixed solution containing 3Wt.% hydrochloric acid and 35Wt.% sulfuric acid at a temperature of 80°C for 120s; (2) Corrosion of the first V pores: Put the pretreated aluminum foil on Into a mixed solution with a temperature of 80°C, a concentration of 5Wt.% hydrochloric acid, 40Wt.% sulfuric acid, and 3Wt.% aluminum ions, and an applied current density of 600mA / cm 2 (3) The second V-hole corrosion: Put the aluminum foil that has completed the first V-hole corrosion into the aluminum foil at a temperature of 70°C and a concentration of 4Wt.% hydrochloric acid and 35Wt.% sulfuric acid. , 3Wt.% aluminum ion mixed solution, the applied current density is 200mA / cm 2 (4) Secondary hole expansion corrosion: put the aluminum foil with holes in the hole expansion corrosion solution at a temperature of 70°C, and apply a current density of 100mA / cm 2 The direct current is used for hole expansion corrosion for 720s, and the hole expansi...

Embodiment 2

[0027] (1) Pretreatment: Soak the aluminum foil in a mixed solution containing 3Wt.% hydrochloric acid and 35Wt.% sulfuric acid at a temperature of 80°C for 120s; (2) Corrosion of the first V pores: Put the pretreated aluminum foil on Into a mixed solution with a temperature of 70°C, a concentration of 4Wt.% hydrochloric acid, 35Wt.% sulfuric acid, and 3Wt.% aluminum ions, and an applied current density of 200mA / cm 2 (3) Second V porosity corrosion: put the aluminum foil that has completed the first V porosity corrosion into the temperature at 80°C, the concentration is 5Wt.% hydrochloric acid, 40Wt.% sulfuric acid , 3Wt.% aluminum ion mixed solution, the applied current density is 600mA / cm 2 (4) Secondary hole expansion corrosion: put the aluminum foil with holes in the hole expansion corrosion solution at a temperature of 70°C, and apply a current density of 100mA / cm 2 The direct current is used for hole expansion corrosion for 720s, and the hole expansion corrosion solutio...

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Abstract

The invention relates to the technical field of anode aluminum foil corrosion for an aluminum electrolytic capacitor, and in particular to a method for corroding a special foil for a medium-and-high-voltage electrolytic capacitor. The method of the present invention mainly includes four steps including pretreatment of the anode aluminum foil, double V hole corrosion, hole reaming corrosion and post treatment, wherein the double V hole corrosion comprises successively inputting the pretreated aluminum foil into two electrolytic cells with different solution components to subject the pretreatedaluminum foil to hole corrosion twices to form a desired long tunnel hole and a short tunnel hole. The double V hole corrosion method can form the long and short tunnel hole structure in the aluminumfoil to meet the requirements of some electrode foils for special electrolytic capacitors. The method has a simple process flow and a good effect, and is convenient for control and industrial implementation.

Description

technical field [0001] The invention relates to the technical field of anode aluminum foil corrosion for aluminum electrolytic capacitors, in particular to an corrosion method for special foils for medium and high voltage electrolytic capacitors and special hole patterns. Background technique [0002] With the rapid development of the electronics industry, the application of aluminum electrolytic capacitors is more extensive, and with people's requirements for individual products, there are more and more products with special specifications, and the performance requirements are gradually improving. Anode aluminum foil is the key material of aluminum electrolytic capacitors, its quality directly affects the performance of capacitors, and the morphology of aluminum electrolytic anode corrosion foil has a more critical impact on the use of capacitors. [0003] Capacitor energy storage spot welders and strobe lights are widely used in low carbon steel, copper, stainless steel, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/055
Inventor 杨小飞梁力勃蔡小宇熊传勇
Owner GUANGXI HEZHOU GUIDONG ELECTRONICS TECH