Square aluminum electrolytic capacitor based on gel electrolyte and preparation method thereof

Abstract

The invention discloses a square aluminum electrolytic capacitor based on a gel electrolyte. The square aluminum electrolytic capacitor comprises a square aluminum shell, a flat and oval-shaped winding type core bag, a rubber plug and a cover plate, and the core bag is sealed in the square aluminum shell by the rubber plug and the cover plate; aluminum stalks of a positive wire and a negative wire of the core bag are hermetically connected with the rubber plug through UV gum or epoxy thermo-curing gum; the gelatinous electrolyte is formed in the core bag and between the core bag and the square aluminum shell; the gelatinous electrolyte is a gelatinous high-molecular compound obtained by polymerizing a solution system as shown in the description and a solution system as shown in the description under the initiation of an initiating agent. The square aluminum electrolytic capacitor disclosed by the invention is small in thickness (width) and great in length, the height can be the same with that of a cylindrical structure aluminum electrolytic capacitor, and the demand of placing an aluminum electrolytic capacitor in a flat space is satisfied while guaranteeing the volume capacity density requirement of the aluminum electrolytic capacitor.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a square aluminum electrolytic capacitor based on gel electrolyte and a preparation method thereof. Background technique [0002] At present, the aluminum electrolytic capacitors that can be seen on the market are designed with a cylindrical structure. This kind of capacitor core package is made by winding with a nail coiler. It is a cylindrical core package. A cylindrical capacitor is made by assembling in an aluminum shell through a waistband. However, in some applications, in order to reduce the volume of integrated circuits and improve volume utilization, only a flat space can be reserved for placing aluminum electrolytic capacitors. The space around cylindrical aluminum electrolytic capacitors cannot be effectively utilized. Volume utilization is low. On the other hand, under the condition of high ripple current, heat is easy to accumulate inside the capacitor. If the heat canno...

AI Technical Summary

Problems solved by technology

However, in some applications, in order to reduce the volume of integrated circuits and improve volume utilization, only a flat space can be reserved for placing aluminum electrolytic capacitors. The space around cylindrical aluminum electrolytic capacitors cannot be effectively utilized. low volume utilization

On the other hand, under the condition of high ripple current, heat is easy to accumulate inside the capacitor. If the heat cannot be dissipated effectively, it will affect the performance of the product.

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