Secondary battery top cover assembly and secondary battery

A secondary battery and top cover technology, which is applied in the direction of secondary batteries, battery pack parts, battery cover/end cover, etc., can solve the problem of high battery safety risk, reduce the possibility of risk, increase the safety distance, Effect of increasing creepage distance

Pending Publication Date: 2019-08-27
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of battery has a high safety risk in actual use

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

[0062] The present invention will be described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Aspects so defined may be combined with any other aspect or aspects unless specifically stated otherwise. In particular, any feature considered to be preferred or advantageous may be combined with one or more other features which are considered to be preferred or advantageous.

[0063] Terms such as "first" and "second" appearing in the present invention are only for convenience of description, to distinguish different components with the same name, and do not indicate a sequence or a primary and secondary relationship.

[0064] In addition, when an element is referred to as being "on" another element, the element may be directly on the other element or may be indirectly on the another element with an interposed therebetween. More intermediate elements. Also, when an element is referred to as being "connected to" anoth...

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Abstract

The invention relates to a secondary battery top cover assembly and a secondary battery. The top cover assembly comprises a top cover plate (3), an electrode terminal (1), a lower insulating plate (5), a sealing part (2) and an insulating part (4), wherein a through hole (31) is formed in the top cover plate (3); the electrode terminal (1) covers the through hole (31); the lower insulating plate (5) is at least partially located on one side, far from the electrode terminal (1), of the top cover plate (3); the sealing part (2) is at least partially located between the top cover plate (3) and the electrode terminal (1); and the insulating part (4) is at least partially arranged between the top cover plate (3) and the lower insulating plate (5), wherein the insulating part (4) and the sealingpart (2) jointly surround the side wall of the through hole (31) and an area, close to the through hole (31), of the upper surface and the lower surface of the top cover plate (3). According to the top cover assembly, the insulating part is additionally arranged between the top cover plate and the lower insulating plate, so that the creepage distance between the top cover plate and the electrodeterminal can be increased; and when a high-voltage discharge occurs in the abnormal condition of the electrode assembly, the safety distance inside the secondary battery is increased equivalently, sothat the possibility of fire explosion and the like of a cell can be reduced, and the working safety of the secondary battery can be improved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a secondary battery top cover assembly and a secondary battery. Background technique [0002] Because lithium-ion batteries have the advantages of high energy density, high power density, many cycle times, and long storage time, they have been widely used in electric vehicles. At present, the voltage of the whole vehicle system is between 300V and 900V. In case of an abnormality in the battery cell, the internal circuit will be disconnected or the fuse part will be disconnected. At this time, the battery cell will withstand the reverse high voltage of the system. Due to the internal safety If the distance is not enough, there will be safety risks such as fire and explosion. [0003] A prior art known to the inventor employs figure 1 In the structure shown, the top cover assembly of the battery includes: electrode terminals 1a, sealing ring 2a, top cover plate 3a and electrica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/04H01M2/08H01M2/34
CPCH01M2220/20H01M50/147H01M50/155H01M50/183H01M50/572H01M50/15H01M50/188H01M50/557Y02E60/10H01M10/0525H01M50/176H01M50/547H01M50/593
Inventor 梁成都吴凯陈新祥黄守君陈柏松苏华圣李国伟
Owner CONTEMPORARY AMPEREX TECH CO
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