Netty anti-explosion gradual-change sheet resistance metalized safety film for capacitor

Abstract

The invention discloses a netty anti-explosion gradual-change sheet resistance metalized safety film for a capacitor. The film comprises a polypropylene film dielectric layer and two metalized film layers plated on the polypropylene film dielectric layer in an evaporation way through uniformly mixed zinc aluminum, wherein the metalized film layers adopt netty structures and are segmented into conductive metal grids by X-shaped plating-free regions; the adjacent X-shaped plating-free regions are disconnected by micro fuses formed by the metalized film layers subjected to the evaporation plating; and the conductive metal grids are connected by the micro fuses. The film has the beneficial effects that the capacitor is high in voltage increment rate, high in high-frequency performance and high in energy storage density, and has very high sensitivity when being passed by a high current; and a self-recovery breakdown part can be effectively isolated during self recovery, so that other parts are prevented from being influenced, the internal safety quality of the whole dry anti-explosion capacitor is ensured, the capacitor is sensitive in response, reliable in self recovery and high in anti-explosion safety performance, and the problems of easy combustion and explosion, poor quality, low reliability, short service life and the like of an existing capacitor product are solved.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to a capacitor mesh explosion-proof gradient square resistance metallized safety film. Background technique [0002] Metallized film is a commonly used component in capacitors. The metallized film commonly used in the market currently uses a simple high-resistance film, which does not have a safety explosion-proof function, poor temperature and high pressure resistance, and poor self-healing ability. The heat generation is serious, but if the safety film is used only, the volume of the core package wound into it is too large and the energy storage density of the capacitor is not enough, and when the electric weak point breaks through, the breakdown current is very large and cannot be controlled, often in the self-healing process The middle bar and the multi-layer dielectric adjacent to the self-healing point are burnt and broken down, causing the capacitor to short-circuit and fa...

AI Technical Summary

Problems solved by technology

Solve the problems of flammability and explosion, poor quality, poor reliability and short service life of existing capacitor products

Images