Thin film capacitor for new energy vehicle

Abstract

The invention provides a thin film capacitor for a new energy vehicle. The thin film capacitor comprises a shell, a capacitor core, a lead-out end and a sealing material; the capacitor core is obtained by winding a metallized polypropylene thin film; the metallized polypropylene thin film comprises a polypropylene thin film body; one side of the polypropylene thin film body is provided with a screen zone with a wavy cut edge; the other side of the polypropylene thin film body is provided with a thickened plated straight linearly cut edge; a metal clad layer is formed on the polypropylene thin film body through vacuum evaporation; the pattern of the metal clad layer is of a half-rectangle type safety explosion-proof structure; and a fuse is arranged in the half-rectangle type safety explosion-proof structure. According to the thin film capacitor of the invention, the pattern of the metal clad layer is of the half-rectangle type safety explosion-proof structure; and one side of the metallized polypropylene thin film is provided with the wavy cut edge, and therefore, the contact area of the capacitor core obtained by winding the metallized polypropylene thin film and the metal clad layer is increased compared with the contact area of a capacitor core obtained by winding a metallized polypropylene thin film which is linearly cut, contact resistance is greatly decreased, the surge current and mechanical shock ability of a product can be improved, and the safety of the capacitor is greatly improved.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to a film capacitor for new energy vehicles. Background technique [0002] In the design of the power supply part of new energy vehicles, it is necessary to use high-voltage film capacitors for smoothing and filtering applications. With the increasing use of new energy electric vehicles, the development and production of high-voltage and large-capacity film capacitors are also receiving more and more attention. people's attention. The electrical performance, safety performance and applicability of high-temperature environments of capacitors directly affect the quality and life of new energy vehicle power supplies. However, the existing capacitors have low safety performance, weak ability to withstand surge current and mechanical shock; , the oscillation effect is serious at high frequency; in addition, the shell and potting material of the existing capacitor are easy to crack un...

AI Technical Summary

Problems solved by technology

The electrical performance, safety performance and applicability of high-temperature environments of capacitors directly affect the quality and life of new energy vehicle power supplies. However, the existing capacitors have low safety performance, weak ability to withstand surge current and mechanical shock; , the oscillation effect is serious at high frequency; in addition, the shell and potting material of the existing capacitor are easy to crack under high temperature environment; and the manufacturing process of the whole capacitor is complicated, which cannot meet the requirements of the use and development of new energy vehicle power supply

Images