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Top cover assembly and power battery

A technology of components and top covers, applied in battery pack components, circuits, electrical components, etc., can solve the problems of large fluctuation range of explosion-proof valve, avoid large fluctuation range, prevent early opening or delayed opening, and improve safety. performance effect

Pending Publication Date: 2021-06-01
SHENZHEN RED FAIRY PRECISION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a top cover assembly and a power battery to solve the problem of a large explosion fluctuation range of the explosion-proof valve of the power battery

Method used

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  • Top cover assembly and power battery

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Embodiment Construction

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the a...

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Abstract

The invention provides a top cover assembly and a power battery. The top cover assembly comprises: a cover plate, wherein one surface of the cover plate is provided with an accommodating groove, and the bottom wall of the accommodating groove is provided with an explosion-proof hole; an explosion-proof piece which seals the explosion-proof hole, wherein a groove is formed in the explosion-proof piece, the face, provided with the groove, of the explosion-proof piece faces the explosion-proof hole, the groove is communicated with the explosion-proof hole, the outer edge of the groove abuts against the inner wall of the containing groove, the size of the groove is larger than that of the explosion-proof hole, and a through groove is formed between the explosion-proof piece and the bottom wall of the containing groove; and a weak part arranged on the bottom wall of the groove, wherein the weak part is exposed in the explosion-proof hole. By increasing the distance between the weak part and the inner wall of the groove, a through groove is formed between the explosion-proof piece and the cover plate, so that when gas breaks through the weak part and pressure or heat is released through the anti-explosion hole, the through groove can play a role in providing blasting buffering, the actual blasting opening pressure value of the explosion-proof piece is within a stable range, and the explosion-proof piece is prevented from being opened in advance or delayed.

Description

technical field [0001] The present application relates to the technical field of energy storage devices, in particular to a roof assembly and a power battery. Background technique [0002] As more and more driving power sources of electric tools and new energy vehicles are developing towards high capacity and high safety, power batteries are widely used in electric tools and new energy vehicles due to their excellent characteristics such as high capacity. . [0003] The power battery can be charged and discharged, and its interior is a relatively sealed environment. During the use and transportation of the power battery, the power battery is overcharged or punctured, causing its short-circuit failure. Generate a lot of heat, burn out the diaphragm, and cause a greater short circuit, so that the battery will generate high temperature, causing the electrolyte to decompose into gas, resulting in excessive internal pressure. When the shell of the battery cannot withstand this p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/152H01M50/325
CPCY02E60/10
Inventor 王有生旷年春李华远浩夏春文
Owner SHENZHEN RED FAIRY PRECISION TECH CO LTD
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