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Manufacturing method of solid-state electrolytic capacitor

A technology of solid electrolytic capacitors and manufacturing methods, which is applied in the direction of solid electrolytic capacitors, electrolytic capacitors, capacitors, etc., which can solve the problems of weak repair ability of positive oxide film defects, high cost of dispersion liquid research and development, cumbersome production process, etc., to achieve increased capacity Extraction rate, solution to insufficient withstand voltage, and high-capacity effects

Inactive Publication Date: 2016-03-16
CAPXON ELECTRONIC (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a solid electrolytic capacitor is a dielectric, and its ability to repair defects in the positive electrode oxide film is weak
Therefore, if solid electrolytic capacitors are used in a high-temperature working environment of 85~150°C for a long time, the LC may increase, and may even cause a short circuit
[0003] At present, solid electrolytic capacitors can only produce solid electrolytic capacitors with a rated voltage of less than 100V due to the impact of the withstand voltage of the conductive polymer dispersion. liquid; but the development cost of dispersion liquid is very high and the cycle is long, and the production process is relatively cumbersome

Method used

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  • Manufacturing method of solid-state electrolytic capacitor
  • Manufacturing method of solid-state electrolytic capacitor
  • Manufacturing method of solid-state electrolytic capacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0039] This embodiment includes the following steps:

[0040] A1. To make the element, cut the positive foil, negative foil and electrolytic paper according to the designed size through a nailing machine, then rivet the positive guide pin and the negative guide pin on the positive foil and the negative foil respectively, and then clip the positive foil and the negative foil The electrolytic paper is wound into a circle, and finally the outer periphery of the circle is wrapped with high-temperature-resistant insulating tape to fix it to form a prime;

[0041] A2. The first impregnation stage. In this stage, the element is impregnated with the high-pressure formation solution of the boric acid system. By applying a voltage of 400V to the guide wire and a current density of 0.05mA / pcs, the oxide film defects on the surface of the positive foil caused by cutting and nailing will be eliminated. Department for repair;

[0042] A3. The second impregnation stage. At this stage, the e...

Embodiment 2

[0047] The steps and principles of this embodiment are basically the same as those of Embodiment 1, except that the treatment liquid used in step A4 is the treatment liquid B in this embodiment, which includes polyethylene with a molecular weight of 600 Diol, calculated by weight percentage, polyethylene glycol (PEG) 35%, ethylene glycol (EG) 15%, γ-butyrolactone 10% (GBL), ethanol 15%, water 20% and phthalic acid 5%.

Embodiment 3

[0049] The steps and principles of this embodiment are basically the same as those of Embodiment 1, except that the treatment liquid used in step A4 is the treatment liquid C, which includes polyethylene glycol with a molecular weight of 1000. Diol, calculated by weight percentage, polyethylene glycol (PEG) 35%, ethylene glycol (EG) 15%, γ-butyrolactone 10% (GBL), ethanol 15%, water 20% and phthalic acid 5%.

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Abstract

The invention provides a manufacturing method of a solid-state electrolytic capacitor, and relates to the technical field of electrolytic capacitors. The method comprises the following steps: S100, manufacturing an element; S200, at a first impregnation stage, impregnating the element with a forming liquid to repair oxide scales caused by cutting and nail coiling on a front foil surface of the element; S300, at a second impregnation stage, impregnating the element with a conducting polymer dispersion liquid; S400, at a third impregnation stage, impregnating the element with a treatment liquid; and S500, packaging the element undergoing the third impregnation stage into an aluminum shell. Through adoption of the method, the development of the dispersion liquid is effectively avoided; the production period is shortened; and the cost is reduced. The treatment liquid and solid-state electrolytes such as conducting polymers are used together, so that the solid-state electrolytic capacitor having the characteristics of high voltage, high capacity, low impedance, small leakage current and the like is obtained. Meanwhile, the high treatment liquid has a function of facilitating repair of positive electrode foil oxide scale defects, so that the situation of short circuit can be restrained.

Description

technical field [0001] The invention relates to the technical field of electrolytic capacitors, in particular to the technical field of aluminum electrolytic capacitors, in particular to a method for manufacturing solid electrolytic capacitors. Background technique [0002] With the digitalization of electronic products, those current output circuits, especially in the fields of AV equipment and automotive devices, are increasingly demanding high-reliability solid electrolytic capacitors, requiring their performance such as miniaturization, high capacity, low ESR and low LC. , There are also special requirements for short-circuit resistance. Compared with solid electrolytic capacitors, liquid electrolytic capacitors have the advantage that the electrolyte can repair the defects of the positive oxide film and inhibit the occurrence of short circuits. However, a solid electrolytic capacitor is a dielectric, and its ability to repair defects in the positive electrode oxide film...

Claims

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Application Information

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IPC IPC(8): H01G9/15H01G9/042H01G13/02
CPCH01G9/042H01G9/15H01G13/02
Inventor 林金村
Owner CAPXON ELECTRONIC (SHENZHEN) CO LTD
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