Ultrathin square capacitor and manufacturing method thereof

Abstract

Disclosed is an ultrathin square capacitor. The ultrathin square capacitor comprises a square steel casing, a flat core cladding and a fixation filler, wherein the fixation filler seals and fixes the flat core cladding into the square steel casing; the thickness of the square steel casing is 2 to 5mm; the flat core cladding comprises anode foil, cathode foil, electrolytic paper, an anode lead wire and a cathode lead wire, the electrolytic paper is disposed between the anode foil and the cathode foil, and the anode lead wire and the cathode lead wire are respectively fixedly connected with the anode foil and the cathode foil and extend out of the square steel casing; and the electrolytic paper is immersed with an electrolyte. The thickness of the square aluminum electrolytic capacitor provided by the invention is much smaller than the diameter of a conventional cylindrical capacitor under the condition of same capacitance. Besides, the square aluminum electrolytic capacitor occupies less space in a thickness direction, improves volume capacity density of the capacitor and improves the utilization rate of space.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a square aluminum electrolytic capacitor and a manufacturing 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 cannot be dissipated effecti...

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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