Power battery, top cover cathode structure and welding method of top cover cathode structure

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

Active Publication Date: 2018-09-18
深圳市大族锂电智能装备有限公司
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  • Summary
  • Abstract
  • Description
  • 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 cathode structure and welding method of top cover cathode structure
  • Power battery, top cover cathode structure and welding method of top cover cathode structure
  • Power battery, top cover cathode structure and welding method of top cover cathode structure

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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 the welding method thereof will be more fully described below with reference to the relevant drawings. The preferred embodiment of the power battery, the negative electrode structure of the top cover and the welding method thereof are given in the drawings. However, the power battery, the top cover negative structure and the welding method thereof 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 the 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 may be directly on the other element or a central element may also exist. When an element i...

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Abstract

The invention relates to a power battery, a top cover cathode structure and a welding method of the top cover cathode structure. The top cover cathode structure comprises a cathode aluminum block, a cathode pole post and a pole post copper block. The welding method of the top cover cathode structure includes the steps that the cathode pole post is assembled in a through hole of the pole post copper block, the pole post copper block and the cathode pole post are in clearance fit, and a weld joint is formed between the pole post copper block and the cathode pole post; friction-stir welding is carried out on one side of the pole post copper block along the weld joint, and a copper-aluminum composite pole post is formed; and the copper-aluminum composite pole post and the cathode aluminum block are connected together, and the top cover cathode structure is formed, wherein the cathode aluminum block is located on the other side of the pole post copper block. Due to the fact that the position of the friction-stir welding is located on the side, deviating from the cathode aluminum block, of the pole post copper block instead of being located between the cathode aluminum block and the polepost copper block, quality inspection of the weld joint between the pole post copper block and the cathode pole post is convenient, and potential safety hazards of the top cover cathode mechanism areavoided.

Description

Technical field [0001] The present invention relates to the technical field of power battery manufacturing, in particular to a power battery, a top cover negative electrode structure and a welding method thereof. Background technique [0002] The traditional method for processing the negative structure of the top cover of a power battery includes: first, forming a copper-aluminum composite pole by 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; , 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-top negative structure. [0003] Since the space between the negative aluminum block and the pole copper block is small, the copper-aluminum friction welding process is implemented between the nega...

Claims

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Application Information

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IPC IPC(8): B23K20/12B23K20/24H01M2/04H01M50/147
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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