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Manufacturing method of medium-high pressure chemical foil

A manufacturing method and a technology for forming foils, which are applied in electrical components, electrolytic capacitors, capacitors, etc., can solve the problems of reduced specific surface area, reduced electrostatic capacitance of electrode foils, and destruction of electrostatic capacitance, and achieves improved specific capacitance, remarkable effect, and improved water resistance. performance effect

Inactive Publication Date: 2012-01-18
RUYUAN YAO AUTONOMOUS COUNTY DONGYANGGUANG FORMED FOIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the oxide film formed during the long-term chemical conversion process may block a considerable number of pores on the corroded foil, reducing the corroded pits that have been formed on the corroded foil and reducing the specific surface area of ​​the electrode foil. Decreased capacitance
[0005] How to address the above-mentioned shortcomings of the traditional formation technology of medium and high voltage formation foils for aluminum electrolytic capacitors, and how to solve the damage to the electrostatic capacity formed by the subsequent process of corrosion treatment has always been a technical problem that the industry urgently needs to solve.

Method used

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  • Manufacturing method of medium-high pressure chemical foil

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Embodiment 1

[0036] Make the aluminum foil that working voltage is 400V according to the method of the present invention, it is 520V to set highest forming voltage (forming voltage), specifically as follows:

[0037] 1) Put the corroded and expanded aluminum foil in 0.1mL / L alkylphenol polyoxyethylene ether OP-10 wetting dispersion, soak at 40°C for 3min, and its HLB value is 13.3-14.5;

[0038] 2 Put the soaked aluminum foil into pure water ≥ 97°C and boil for 8 minutes;

[0039] 3) Place the boiled aluminum foil again in 0.1mL / L wetting dispersion of alkylphenol polyoxyethylene ether OP-10 for 2min at 30°C;

[0040] 4) The re-wetted aluminum foil is subjected to primary formation in 5% borate solution at 85°C, boosted to 156V and then kept at constant pressure for 15 minutes;

[0041] 5) The aluminum foil after primary formation is subjected to secondary formation in 5% borate solution at 85°C, boosted to 312V and then kept at constant pressure for 15 minutes;

[0042] 6) The aluminum ...

Embodiment 2

[0054] Make the aluminum foil that working voltage is 450V according to the method of the present invention, it is 590V to set highest forming voltage (forming voltage), specifically as follows:

[0055] 1) Put the corroded and expanded aluminum foil in 0.15mL / L nonylphenol polyoxyethylene ether NP-7 wetting dispersion, soak at 30°C for 4min, and its HLB value is 11.7-12;

[0056] 2) Put the infiltrated aluminum foil into pure water ≥ 97°C and boil for 10 minutes;

[0057] 3) Place the boiled aluminum foil in 0.15mL / L nonylphenol polyoxyethylene ether NP-7 wetting dispersion again, and soak at 25°C for 2min;

[0058] 4) The re-wetted aluminum foil was subjected to primary formation in 5% borate solution at 85°C, boosted to 177V and then kept at constant pressure for 15 minutes;

[0059] 5) The aluminum foil after primary formation is subjected to secondary formation in 5% borate solution at 85°C, boosted to 354V and then kept at constant pressure for 15 minutes;

[0060] 6) ...

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Abstract

The invention relates to a manufacturing method of a medium-high pressure chemical foil, and the manufacturing method comprises pretreatment on an aluminum foil which is subjected to erosion surface expansion and multilevel formation treatment. The pretreatment comprises the following steps of carrying out infiltration treatment on the aluminum foil which is subjected to erosion surface expansionin a wetting disperse liquid, wherein the wetting disperse liquid is a water solution of a non-ionic surface active agent of which the hydrophilic-lipophilic balance (HLB) value is at 11-15. The manufacturing method of the medium-high pressure chemical foil in the invention can be capable of generating a stable oxidation film, meanwhile, and reducing the loss brought by the follow formation on the formed specific area of the aluminum foil, thereby improving the electrostatic capacity and water-tolerant performance of the aluminum foil.

Description

technical field [0001] The invention relates to a method for preparing an aluminum foil for a capacitor, and more specifically, the invention relates to a method for manufacturing a medium-voltage anode foil for an electrolytic capacitor. Background technique [0002] Aluminum electrolytic capacitors are energy storage components used in circuits for tuning, filtering, coupling, bypassing, energy conversion, and time delay, and thus are widely used in many related industries such as electronic appliances. Now, with the advancement of science and technology and the development of industry, the requirements for the miniaturization and portability of electronic and electrical products are becoming more and more urgent; at the same time, higher and higher requirements are also put forward for the electrical performance of electrolytic capacitors. [0003] The volume of medium and high voltage aluminum electrolytic capacitors is mainly restricted by the electrostatic capacity of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/055
Inventor 严志强
Owner RUYUAN YAO AUTONOMOUS COUNTY DONGYANGGUANG FORMED FOIL CO LTD
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