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Power battery current collector tab shaping method and battery thereof

A power battery and tab shaping technology, which is applied to battery pack components, circuits, electrical components, etc., can solve the problems of not clearly adopting specific technical means of folding, and not involving current collector tab shaping, etc., and achieves the level of folding The effect of smooth, reasonable processing and shaping steps

Pending Publication Date: 2022-04-19
WANXIANG 123 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"However, the specific technical means of folding is not clearly adopted in this technical plan, and it does not involve the specific problem of how the current collector tab is shaped.

Method used

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  • Power battery current collector tab shaping method and battery thereof
  • Power battery current collector tab shaping method and battery thereof

Examples

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Embodiment 1

[0038] The power battery of the present invention is composed of a positive electrode sheet 3, a negative electrode sheet 4, a diaphragm 2, a positive electrode ear, a negative electrode ear, an electrolyte and an outer packaging material. The positive electrode sheet 3 or the negative electrode sheet 4 is formed by coating a positive electrode or negative electrode active material on a metal foil which is a positive electrode current collector or a negative electrode current collector. The size of the negative electrode active material coating area of ​​the negative electrode sheet 4 is larger than that of the positive electrode active material coating area, and the size of the separator 2 is larger than that of the negative electrode active material coating area. The negative electrode sheet 4, the separator 2, and the positive electrode sheet 3 are laminated or wound to form the cell of the battery.

[0039] like figure 1 As shown, a power battery current collector tab sha...

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Abstract

The invention relates to the technical field of power batteries, in particular to a power battery current collector tab shaping method and a battery thereof, and the shaping method comprises the following steps: S1, pressing; s2, primary shaping; s3, carrying out secondary shaping; s4, the current collector tab metal foil shaped in the step S3 is leveled horizontally; and S5, welding. By shaping the tabs, the tab foil is tightly attached to the battery cell body, an elastic body is formed between the welding area and the battery cell body, the stress of the current collector tab metal foil is changed from single stress to multi-layer simultaneous stress when the positive tab or the negative tab is bent, and the problem of breakage of the current collector tab metal foil under assembly and working conditions is effectively solved.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a method for shaping a current collector tab of a power battery and a battery thereof. Background technique [0002] As the energy density requirements of power batteries continue to increase, increasing the energy density of the battery not only improves the battery chemical system, but also leaves more physical space for active materials and improves the energy density of the battery. The larger the thickness, the thicker the thickness, 8 ~ 16mm is more common. [0003] The arrangement process of the positive or negative current collector tabs of the power battery generally has two methods: centering along the thickness direction of the cell and biasing to one side. In the process, the positive or negative current collector tabs are generally compressed first, and then the current collector tabs are pressed. The tight position is pre-welded first, and then the positive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D1/00B21D43/00H01M50/531
CPCB21D1/00B21D43/00H01M50/531Y02E60/10
Inventor 张道振韩笑饶绍建吴荻陈海港
Owner WANXIANG 123 CO LTD
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