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Secondary battery and battery module

A technology for secondary batteries and electrode assemblies, which is used in the repair/maintenance of secondary batteries, battery pack components, battery covers/end caps, etc., and can solve problems such as affecting the life of secondary batteries and failing to work normally.

Pending Publication Date: 2020-07-07
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the charging and discharging process, the electrode assembly will expand in the arrangement direction of the secondary batteries, and the expansion force generated by the electrode assemblies of the plurality of secondary batteries will be superimposed along the arrangement direction and form an excessive resultant force; the resultant force Squeeze the secondary battery, causing the secondary battery to not work properly and affecting the life of the secondary battery

Method used

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Embodiment Construction

[0039] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0040] In the description of this application, unless otherwise clearly specified and limited, the terms "first", "second", and "third" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; terms "Multiple" refers to two or more; unless otherwise specified or stated, the terms "connected" and "fixed" should be interpreted in a broad sense, for example, "connected" can be fixed or detachable Connection, or integral connection, or electrical connection, or signal connection; "connection" can be directly connecte...

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Abstract

The invention provides a secondary battery and a battery module. The battery module comprises a plurality of secondary batteries arranged in sequence. The secondary battery includes an electrode assembly, a case, and a top cover assembly. The shell is provided with a containing cavity; the electrode assembly is contained in the containing cavity. The electrode assembly comprises a plurality of electrode units, wherein the electrode units are arranged in a stacked mode in the axial direction of the containing cavity. The top cover assembly comprises a top cover plate and an explosion-proof sheet, wherein the top cover plate is connected to the shell and located on one side of the electrode assembly in the axial direction. The top cover plate is provided with a through hole, and the explosion-proof sheet is connected to the top cover plate and covers the through hole. One side, close to the electrode assembly, of the top cover plate is provided with a first inner surface; one side, closeto the electrode assembly, of the explosion-proof piece is provided with a second inner surface, and the distance between the first inner surface and the electrode assembly is smaller than that between the second inner surface and the electrode assembly. In the battery module, the arrangement direction of the plurality of secondary batteries is perpendicular to the axial direction.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a secondary battery and a battery module. Background technique [0002] A battery module usually includes a plurality of secondary batteries arranged in sequence, and each secondary battery is provided with an electrode assembly inside. During the charging and discharging process, the electrode assembly will expand in the arrangement direction of the secondary batteries, and the expansion force generated by the electrode assemblies of the plurality of secondary batteries will be superimposed along the arrangement direction and form an excessive resultant force; the resultant force Extruding the secondary battery will cause the secondary battery to fail to work normally and affect the life of the secondary battery. Contents of the invention [0003] In view of the problems existing in the background technology, the purpose of the present invention is to provide a secondary battery and ...

Claims

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Application Information

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IPC IPC(8): H01M2/20H01M2/26H01M10/42H01M2/12H01M50/147H01M50/50H01M50/531
CPCH01M10/42H01M50/342H01M50/50H01M50/531H01M50/147Y02E60/10H01M50/30Y02P70/50
Inventor 史东洋陈元宝陈宁金海族李振华胡飞
Owner CONTEMPORARY AMPEREX TECH CO
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