Power battery, top cover negative electrode structure and welding method thereof

A welding method and negative electrode technology, which are applied to battery cover/end cover, structural parts, welding equipment, etc., can solve the problems of hidden safety hazards and low production efficiency of the negative electrode structure of the top cover.

Active Publication Date: 2020-09-22
深圳市大族锂电智能装备有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a power battery, a top cover negative electrode structure and a welding method for the problems of potential safety hazards and low production efficiency in the top cover negative electrode structure

Method used

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  • Power battery, top cover negative electrode structure and welding method thereof
  • Power battery, top cover negative electrode structure and welding method thereof
  • Power battery, top cover negative electrode structure and welding method thereof

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Embodiment Construction

[0032] In order to facilitate the understanding of the present invention, the power battery, the top cover negative electrode structure and its welding method will be more fully described below with reference to the relevant drawings. The preferred embodiments of the power battery, the top cover negative electrode structure and its welding method are given in the accompanying drawings. However, the power battery, the top cover negative electrode structure and its welding method can be implemented in many different forms, and are not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the power battery, the top cover negative electrode structure and its welding method more thorough and comprehensive.

[0033] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an eleme...

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Abstract

The invention relates to a power battery, a top cover negative electrode structure and a welding method thereof. The above-mentioned welding method of the top cover negative electrode structure, the top cover negative electrode structure includes a negative electrode aluminum block, a negative electrode pole and a pole copper block, and the welding method of the top cover negative electrode structure includes: assembling the negative pole pole to the through hole of the pole copper block Inside, the gap between the pole copper block and the negative pole is matched to form a weld; friction stir welding is performed on one side of the pole copper block and along the weld to form a copper-aluminum composite pole; the copper-aluminum composite pole It is connected with the negative aluminum block to form a top cover negative electrode structure; wherein, the negative aluminum block is located on the other side of the pole copper block. Since the position of the friction stir welding is located on the side of the pole copper block away from the negative aluminum block, rather than between the negative aluminum block and the pole copper block, the quality of the weld between the pole copper block and the negative pole It is more convenient to check, and avoids potential safety hazards in the negative electrode mechanism of the top cover.

Description

technical field [0001] The invention relates to the technical field of power battery manufacture, in particular to a power battery, a top cover negative electrode structure and a welding method thereof. Background technique [0002] The traditional method of processing the negative electrode structure of the top cover of the power battery includes: firstly, the copper-aluminum composite pole is formed through copper-aluminum friction welding composite processing, and the copper-aluminum composite part of the copper-aluminum composite pole is on the upper surface of the copper block of the pole; and then , The copper-aluminum composite pole is riveted with the negative aluminum block and other structural parts to form the top cover negative electrode; finally, the negative pole is laser welded to form the top cover negative electrode structure. [0003] Since the space between the negative aluminum block and the pole copper block is small, the copper-aluminum friction welding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/04B23K20/12B23K20/24H01M50/147
CPCB23K20/122B23K20/24H01M50/147Y02E60/10
Inventor 郑国强刘昊胡勇徐作斌雷鹏飞王锐王培为高云峰
Owner 深圳市大族锂电智能装备有限公司
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