Manufacturing method for semi-solid aluminum electrolytic capacitor

Abstract

The invention proposes a manufacturing method for a semi-solid aluminum electrolytic capacitor, and relates to the technical field of aluminum electrolytic capacitors. The method comprises the following steps: S100, the making of an element; S200, a first impregnation stage, wherein the element is impregnated into a liquid at the stage; S300, a second impregnation stage, wherein the element is impregnated with a conductive polymer monomer, an oxidant and dispersion liquid at the stage; S400, a third impregnation stage, at which the element is impregnated with a treatment liquid; S500, a fourthimpregnation stage, at which the element is impregnated with an electrolyte; S600, the packaging of the element which is subjected to the fourth impregnation stage into an aluminum shell. In the invention, a mixed aluminum electrolytic capacitor (the semi-solid aluminum electrolytic capacitor) which contains the three materials (a conductive solid layer, treating fluid and the electrolyte) and isformed by the conductive polymers is disposed in the capacitor element. The semi-solid aluminum electrolytic capacitor has the characteristics of high reliability, high capacity, high ripple currentresistance and the like, has the function of promoting the repair of the defect portion of an oxide film of anode foil, and can suppress the occurrence of a short circuit fault.

Description

technical field [0001] The invention relates to the technical field of aluminum electrolytic capacitors, in particular to a method for manufacturing a semi-solid aluminum electrolytic capacitor. Background technique [0002] With the digitalization of electronic products, those current output circuits, especially in the field of AV equipment and automotive devices, are increasingly demanding high reliability, 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-state electrolytic capacitors, liquid aluminum electrolytic capacitors have the advantage that the electrolyte can repair the defective part of the oxide film of the anode foil and suppress the occurrence of short-circuits. Even if the solvent of the electrolyte is gone due to volatilization, there is electrolytic paper insulation between the oxidizable film and the negative foil, so the failure mo...

AI Technical Summary

Problems solved by technology

However, if the use time exceeds the life guarantee period, the capacitor will eventually disappear due to the volatilization of the solvent of the electrolyte, and the oxide film of the anode foil will also lose its self-repairing function

Although there will still be a conductive solid layer composed of conductive polymers inside the element, it will still cause LC to increase, and even lead to short-circuit failure mode

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