Secondary battery top cover assembly and secondary battery

A secondary battery and top cover technology, applied in battery pack components, electrical components, circuits, etc., can solve the problem of large fluctuations in explosion pressure of explosion-proof valves, avoid opening pressure fluctuations, reduce manufacturing costs, and ensure stability. Effect

Pending Publication Date: 2021-01-15
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 secondary battery top cover assembly and a secondary battery to solve the problem of a large fluctuation range of the explosion pressure of the explosion-proof valve of the secondary battery

Method used

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  • Secondary battery top cover assembly and secondary battery
  • Secondary battery top cover assembly and secondary battery
  • Secondary battery top cover assembly and secondary battery

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Embodiment Construction

[0038] 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.

[0039] 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 present invention provides a secondary battery top cover assembly and a secondary battery, the secondary battery top cover assembly comprising a cover plate provided with an explosion-proof hole;a first abutting part which is arranged on the inner wall of the explosion-proof hole in a protruding mode and is arranged in the circumferential direction of the explosion-proof hole; an anti-explosion piece which abuts against the first abutting part and seals the anti-explosion hole and is made of plastic; and a fastener which abuts against the edge of the explosion-proof sheet, wherein a through hole is formed in the fastener, and the explosion-proof sheet is exposed out of the through hole. The metal material of the existing metal explosion-proof sheet is replaced by the plastic explosion-proof sheet, and the explosion-proof sheet is fixed on the cover plate of the top cover through the fastener with the through hole, so that the explosion-proof sheet is exposed in the through hole, and when the internal air pressure of the battery reaches a certain value, the explosion-proof sheet is separated from the edge, and the purpose of pressure relief is achieved; and the problem of fluctuation of the opening pressure of the explosion-proof sheet caused by welding is avoided, and the safety performance of the secondary battery is improved.

Description

technical field [0001] The present application relates to the technical field of energy storage devices, in particular to a secondary battery top cover assembly and a secondary 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, secondary batteries are widely used in electric tools and new energy vehicles due to their excellent characteristics such as high capacity. middle. [0003] The secondary battery can be charged and discharged, and its interior is a relatively sealed environment. In the event of overcharging or being punctured and causing a short circuit failure, a large amount of heat and gas will be quickly generated inside the secondary battery and accumulated in the battery cell. As a result, the internal pressure of the secondary battery increases, and when the internal pressure reaches a preset pressure value, it will cause expansion and exp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/342H01M50/15
CPCY02E60/10H01M50/342H01M50/15H01M50/30
Inventor 王有生覃太平李华远浩夏春文
Owner SHENZHEN RED FAIRY PRECISION TECH CO LTD
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