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Laminated lithium battery aluminum shell structure and manufacturing method thereof

A manufacturing method and technology for lithium batteries, which are applied in structural parts, battery pack parts, battery boxes/jackets, etc., can solve problems such as high welding and assembly requirements

Active Publication Date: 2015-12-09
昆山斯格威电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Friction stir welding also has certain deficiencies, for example, the workpiece to be welded must be clamped and fixed, the requirements for welding assembly are higher, and the requirements for the gap between the butt joints are higher than that of filler wire welding but lower than that of laser welding

Method used

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  • Laminated lithium battery aluminum shell structure and manufacturing method thereof
  • Laminated lithium battery aluminum shell structure and manufacturing method thereof
  • Laminated lithium battery aluminum shell structure and manufacturing method thereof

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] An aluminum shell structure of a laminated lithium battery includes a shell wall 1 and a shell bottom 2, the shell bottom 2 is completely located in the shell wall 1, and a gap of 0-0.2 mm is left between one side and the shell wall 1; 2 and the shell wall 1 are welded by friction stir welding, and the friction stir welding seam runs along the joint between the shell bottom 2 and the shell wall 1 for a whole circumference.

[0024] A method for manufacturing an aluminum shell structure of a laminated lithium battery, which is characterized by comprising the following steps: S1. Sleeve the shell wall 1 outside the shell wall positioning column 4, and the lower part of the shell wall 1 is in contact with the positioning base 5; S2 , Put the shell bottom 2 in the space enclosed by the shell wall 1 and the upper surface 401 of the shell wall positioning column 4, an...

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Abstract

The invention discloses a laminated lithium battery aluminum shell structure and a manufacturing method thereof. The structure comprises a shell bottom and a shell wall, wherein the shell bottom is completely located in the shell wall, the peripheral outline of the shell bottom is attached to the shell wall with a 0-0.2 mm gap reserved on each side, and the shell bottom and the shell wall are connected through friction stir spot welding. The laminated lithium battery aluminum shell structure manufactured with the method is high in strength reliability and sealing performance, neat and attractive in appearance, and capable of improving the shape consistency of batteries.

Description

technical field [0001] The invention relates to the technical field of lithium battery packaging, in particular to an aluminum casing structure of a laminated lithium battery and a manufacturing method thereof. Background technique [0002] At present, there are mainly two structural forms of aluminum casings for packaging laminated lithium batteries on the market. One is that the bottom of the shell is integrated with the shell wall. This aluminum shell is made by stamping. The thickness of the aluminum plate used is small, generally less than 0.6mm, and the volume of the aluminum shell made is also relatively small. It is mainly used for A battery with a smaller volume and capacity such as a mobile phone battery. Another aluminum shell structure is welded by a separate straight cylindrical shell wall (with a rectangular cross-sectional shape) and a plate-shaped shell bottom. The welding methods mainly include argon arc welding and laser welding. [0003] The surface of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/02B23K20/12B23K20/26B23K37/04H01M50/10
CPCB23K20/122B23K20/1245B23K20/126H01M50/10Y02E60/10
Inventor 蔡智亮杨洪刚黄辉沈金华李彦国谷国迎赵欣康荣峰
Owner 昆山斯格威电子科技有限公司
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