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Method for preparing solid aluminum electrolytic capacitor

A technology of electrolytic capacitors and solid aluminum, applied in solid electrolytic capacitors, capacitor parts, capacitor casings/packages, etc., can solve the problems of increased leakage current and damage to the oxide film layer, so as to reduce ESR, increase the density, and improve the The effect of the adsorption effect

Inactive Publication Date: 2009-08-19
ZHUHAI LEAGUER CAPACITOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it also has shortcomings. Due to the core-wrapped carbonization treatment after the chemical formation repair, the high temperature of the carbonization damages part of the oxide film layer of the chemical formation foil, resulting in an increase in leakage current, which brings certain shortcomings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of a solid aluminum electrolytic capacitor, the steps are as follows:

[0023] 1. Anodized aluminum foil, cathodic aluminum foil, and electrolytic paper are wound into a core pack through a core wrap winding machine. The electrolytic paper is between anodized aluminum foil and cathodic aluminum foil, and the length of the electrolytic paper is longer than that of the cathode foil and the anodized aluminum foil. The length of the overlapping part is long;

[0024] 2. Weigh pure water, ammonium dihydrogen phosphate and diammonium hydrogen phosphate respectively. First take 200ml of pure water and heat it to 95±5°C, pour ammonium dihydrogen phosphate and diammonium hydrogen phosphate into hot water to dissolve, then pour the mixed solution into the remaining pure water, and stir thoroughly for 7 minutes;

[0025] 3. Immerse the wound core pack in the chemical forming solution, and apply voltage for 10 minutes to repair the electrode foil. The temperat...

Embodiment 2

[0031] A preparation method of a solid aluminum electrolytic capacitor, the steps are as follows:

[0032] 1. Anodized aluminum foil, cathodic aluminum foil, and electrolytic paper are wound into a core pack through a core wrap winding machine. The electrolytic paper is between anodized aluminum foil and cathodic aluminum foil, and the length of the electrolytic paper is longer than that of the cathode foil and the anodized aluminum foil. The length of the overlapping part is long;

[0033] 2. Weigh pure water, ammonium dihydrogen phosphate and diammonium hydrogen phosphate respectively. First take 200ml of pure water and heat it to 95±5°C, pour ammonium dihydrogen phosphate and diammonium hydrogen phosphate into hot water to dissolve, then pour the mixed solution into the remaining pure water, and stir thoroughly for 7 minutes;

[0034] 3. Immerse the wound core pack in the chemical forming solution, and apply voltage for 10 minutes to repair the electrode foil. The temperat...

Embodiment 3

[0040] A preparation method of a solid aluminum electrolytic capacitor, the steps are as follows:

[0041] 1. Anodized aluminum foil, cathodic aluminum foil, and electrolytic paper are wound into a core pack through a core wrap winding machine. The electrolytic paper is between anodized aluminum foil and cathodic aluminum foil, and the length of the electrolytic paper is longer than that of the cathode foil and the anodized aluminum foil. The length of the overlapping part is long;

[0042] 2. Weigh pure water, ammonium dihydrogen phosphate and diammonium hydrogen phosphate respectively. First take 200ml of pure water and heat it to 95±5°C, pour ammonium dihydrogen phosphate and diammonium hydrogen phosphate into hot water to dissolve, then pour the mixed solution into the remaining pure water, and stir thoroughly for 7 minutes;

[0043] 3. Immerse the wound core pack in the chemical forming solution, and apply voltage for 10 minutes to repair the electrode foil. The temperat...

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Abstract

The invention discloses a preparation method of a solid aluminum electrolytic capacitor, which aims at providing a preparation method that can reduce leakage current (LC) so as to improve the electrical property of the capacitor. The preparation method comprises the following steps: after going through formation and carbonization treatment, a well-winded core package is subjected to forming liquid restoration treatment technique and can also be subjected to carbonization treatment for a plurality of times and formation treatment for a plurality of times; carbonization treatment can improve the adsorption effect of impregnation liquid, increase the density of polymer, improve conducting effect and reduce ESR. Repeated formation can better restore the damage of an oxide film caused by foil cutting, nail rolling and carbonization, and reduce leakage current of the capacitor.

Description

technical field [0001] The invention relates to a preparation method of an electrolytic capacitor, in particular to a preparation method of a solid aluminum electrolytic capacitor. Background technique [0002] Compared with ordinary liquid electrolytic capacitors, solid electrolytic capacitors have outstanding electrical properties, such as low equivalent series resistance (ESR), high ripple current resistance, long service life, and stable performance. With the continuous upgrading of electronic products and the continuous improvement of their functions and performance, the requirements for high-frequency characteristics of capacitors are also getting higher and higher. Various methods are used to reduce the ESR of solid electrolytic capacitors to meet the high-frequency characteristics of capacitors. [0003] Chinese patent application number 200610037792.5 discloses a method for preparing a solid electrolytic capacitor, which uses thiophene monomers and alkoxybenzenesulf...

Claims

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Application Information

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IPC IPC(8): H01G9/15H01G9/08C25D11/00C25D11/36
Inventor 龙纪明李振中
Owner ZHUHAI LEAGUER CAPACITOR
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