Capacitor based on metallized film nano-evaporation technique and preparation process of capacitor

Abstract

The invention discloses a capacitor based on a metallized film nano-evaporation technique and a preparation process of the capacitor, and belongs to the field of capacitors. The technical scheme is characterized in that the capacitor comprises a casing, a cover plate and a capacitor core, wherein the capacitor core comprises a metallized polypropylene film which is tightly attached to the outer surface of the capacitor core, and the metallized polypropylene film is of a double-layer and double-side structure; the upper part of the casing is fixedly connected with the cover plate, the capacitorcore is embedded in the casing, heat-shrinkable tubing is tightly attached to the inner wall of the casing, and an aluminum shell is connected in the heat-shrinkable tubing in a penetration manner. According to the capacitor based on the metallized film nano-evaporation technique and the preparation process of the capacitor, surge current resistance of the capacitor can be improved by the metallized polypropylene film, and contact loss is reduced, so that open circuit or substantially reduced capacity of the capacitor can be avoided.

Description

technical field [0001] The invention relates to the field of capacitors, in particular to a capacitor based on nano-evaporated metallized film technology and a preparation process thereof. Background technique [0002] A capacitor based on nano-evaporated metallized film technology is a device that accommodates charges. Through the capacitor core, it can have charge and discharge characteristics and the ability to prevent DC current from passing through and allow AC current to pass through. However, the capacitance inside the capacitor is easy to cause attenuation. , so that the reliability of the capacitor is reduced. [0003] The Chinese patent with the authorized announcement number CN202662458U discloses a capacitor, which includes a shell, a hard insulating liner, an insulating filler and a capacitive element. The hard insulating liner can play a role of high temperature fuse protection, thereby preventing short circuit and high temperature Explosion or combustion effe...

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a capacitor based on nano-evaporation metallization film technology and its preparation process, which can successively evaporate aluminum and nano-zinc composite metallization on the polypropylene base film medium. film, so as to avoid the problems of poor capacity stability and weak ability to carry large current due to thin metallized film layer

Images