Battery case, secondary battery and battery pack

A battery shell and shell technology, which is applied in the direction of battery box/coat, battery cover/end cover, battery pack parts, etc., can solve the problems of easy breakdown of battery cells, poor welding, etc.

Pending Publication Date: 2020-12-01
SHENZHEN RED FAIRY PRECISION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present application provides a battery casing, a secondary battery and a battery pack, aiming to solve the technical problem in the prior art that the battery cell is easily broken down when the top cover of the battery casing is welded to the casing, resulting in poor welding

Method used

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  • Battery case, secondary battery and battery pack
  • Battery case, secondary battery and battery pack
  • Battery case, secondary battery and battery pack

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Embodiment Construction

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0035] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation shown in the drawings Or positional relationship is only for the convenience of describing the present i...

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Abstract

The present application provides a battery case, a secondary battery and a battery pack. The battery case comprises: a shell which is U-shaped and integrally provided; and a cover plate matched with the shell, wherein the cover plate comprises a cover plate body arranged on the shell in a covering mode and a step part arranged around the outer edge of the cover plate body in an extending mode, thestep part comprises a first step surface connected to the outer edge surface of the shell in an abutting mode and a second step surface connected to the inner surface of the shell in an abutting mode, a welding seam for welding is formed between the first step surface and the outer edge surface of the shell, a welding seam opening is located on one side of the outer surface of the shell, and thewelding seam extends to the second step surface. The cover plate of the battery case provided by the invention is provided with the step part, and the thickness formed by the step part can prevent laser from breaking through the battery case when the welding seam is formed between the top cover and the shell for welding and sealing, so that the risk that a battery cell is broken through is reduced, and the yield of products is improved.

Description

technical field [0001] The present application relates to the technical field of new energy batteries, in particular to a battery casing, a secondary battery and a battery pack. Background technique [0002] In modern society, more and more driving power sources of electric tools and new energy vehicles are developing in the direction of high capacity and high safety. Batteries are widely used in electric tools and new energy vehicles due to their excellent characteristics such as high capacity. In addition to high capacity, these batteries should also have good safety in order to reach the standard of use and meet people's needs. [0003] In general secondary batteries, in order to facilitate the assembly of the battery cell, the top cover and the shell will be made into a "U"-shaped structure. After the tabs of the battery cell and the poles of the top cover are welded, Into the shell, the shell package. During packaging, the top cover of the battery is covered on the ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02H01M2/04
CPCH01M50/147H01M50/166H01M50/15Y02E60/10
Inventor 王有生远浩吴清泉李华
Owner SHENZHEN RED FAIRY PRECISION TECH CO LTD
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