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Production method for preventing 4.5 [mu] m copper foil from whitening

A production method and anti-whitening technology, applied in instruments, electrolytic components, optics, etc., can solve problems that have not been discovered

Active Publication Date: 2022-05-13
GUANGDONG FINE YUAN SCI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And this kind of problem has never been found in the production of 6 micron and 8 micron copper foil

Method used

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  • Production method for preventing 4.5 [mu] m copper foil from whitening
  • Production method for preventing 4.5 [mu] m copper foil from whitening
  • Production method for preventing 4.5 [mu] m copper foil from whitening

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 1. Phenomenon and cause investigation in production

[0058] When the first factory of the company tried to produce 4.5μm copper foil, it was found that the copper foil produced by it often appeared as attached figure 1 The problem shown: the surface of the copper foil is whitish (this problem requires a specific light to be found at a specific angle).

[0059] Since the production line of the first factory is old equipment (imported equipment was adopted in 2003), the technical reformers conducted investigations from the following aspects:

[0060] A. Whether it can be eliminated by polar distance. In "CN111172566B A Production Process for Eliminating White Spots of Electrolytic Copper Foil, Foil Making Machine, and Pole Distance Control Method", the applicant eliminates the white spot of copper foil by adjusting the pole distance between the cathode roller and the anode tank. However, it has been found in practice that it is difficult to eliminate the whitening of...

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Abstract

The invention discloses a production method for preventing 4.5-micron copper foil from whitening. The production method is technically characterized in that the liquid inlet flow of a crude foil machine is not smaller than the whitening prevention critical flow of 4.5-micron copper foil; wherein the anti-whitening critical flow of the 4.5-micron copper foil is 667 x liters / minute; wherein the width of the cathode roller is x meters. By adopting the production method provided by the invention, the production quality of the 4.5-micron copper foil can be ensured.

Description

technical field [0001] The invention relates to the field of electrolytic copper foil for power batteries of new energy vehicles, and more specifically relates to a production method for preventing 4.5 μm copper foil from whitening. Background technique [0002] Ningde Times New Energy Technology Co., Ltd. discloses a battery, electric vehicle and consumer electronic products in CN112133925B. In the battery, a copper foil current collector with a thickness of 1 μm to 5.9 μm is used to ensure the rate performance of the battery And prevent the negative electrode from lithium precipitation. [0003] In order to meet the needs of upstream battery manufacturers for negative electrode collectors, copper foil manufacturers currently regard 4.5 micron copper foil as a key area of ​​research. [0004] When the applicant produced 4.5 micron copper foil, it was found that the foil surface of the copper foil was whitish (such as figure 1 situation shown). This problem has never been...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/20C25C7/06
CPCC25C1/20C25C7/06
Inventor 杨苑王崇华廖平元庄如珍赖静温益霞林皓赖金玲
Owner GUANGDONG FINE YUAN SCI TECH CO LTD