锂离子动力电池极片的激光切割分析

邓永丽; 李庆; 黄学杰

doi:10.3788/CO.20181106.0974

Volume 11 Issue 6

Dec. 2018

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Chinese Optics > 2018 > 11(6): 974-982.

DENG Yong-li, LI Qing, HUANG Xue-jie. Analysis of laser cutting of lithium-ion power battery pole piece[J]. Chinese Optics, 2018, 11(6): 974-982. doi: 10.3788/CO.20181106.0974

Citation:

DENG Yong-li, LI Qing, HUANG Xue-jie. Analysis of laser cutting of lithium-ion power battery pole piece[J]. Chinese Optics, 2018, 11(6): 974-982. doi: 10.3788/CO.20181106.0974

DENG Yong-li, LI Qing, HUANG Xue-jie. Analysis of laser cutting of lithium-ion power battery pole piece[J]. Chinese Optics, 2018, 11(6): 974-982. doi: 10.3788/CO.20181106.0974

Citation:

DENG Yong-li, LI Qing, HUANG Xue-jie. Analysis of laser cutting of lithium-ion power battery pole piece[J]. Chinese Optics, 2018, 11(6): 974-982. doi: 10.3788/CO.20181106.0974

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Analysis of laser cutting of lithium-ion power battery pole piece

doi: 10.3788/CO.20181106.0974

1.
Institute of Industry Technology of Guangzhou & Chinese Academy of Sciences, Guangzhou 511458, China
2.
Institute of physics, Chinese Academy of Sciences, Beijing 100190, China

Funds:

Science and Technology Service Network Initiative:Research on the key Production Technology of Innovative Power Battery Y7A5010101

Industrial Strong Foundation Engineering of MIIT 2013: the Basic Platform of Lithium-ion Power Battery Process Equipment Technology

More Information

Corresponding author: DENG Yong-li, E-mail:dengyongli@gziit.ac.cn
Received Date: 14 Sep 2018
Rev Recd Date: 05 Jun 2018
Publish Date: 01 Dec 2018

Abstract

Abstract

In order to meet the demand of lithium-ion battery industry, and to seek a high-efficiency and high-quality cutting method, the cutting quality by various lasers are investigated. Comparing with the image measuring instrument and SEM, it is found that the burr and heat-affected zone(HAZ) of aluminum foil cut by Q-type 1 064 nm fiber laser with 100 ns pulse width are about 15 μm and 60 μm, and the HAZ of negative copper foil is about 200 μm, the burr and HAZ of aluminum foil cut by MOPA fiber laser with 20 ns pulse width are 10 μm and 20 μm, respectively, and the HAZ of copper foil is about 70 μm. The burr and HAZ of aluminum foil cut by 10 picoseconds pulsed solid laser are about 6 μm and 10 μm separately, a zone of no melting and re-condensation is achieved when copper foil is cut. The HAZ of aluminum foil are about 10 μm and 17 μm respectively when they are cut by 355 nm UV and 532 nm green solid lasers with 20 ns pulsed width. However, the HAZ are more than 70 μm and 100 μm when cutting copper foil. The experimental results show that the narrower the pulse width and the higher the repetition frequency, the better the cutting quality of pole piece. The PS laser cuts the pole piece with the highest precision and the best quality, which is the most ideal laser for cutting the pole piece. At present, the MOPA fiber laser with high frequency and relatively narrow pulse width has the highest cutting speed, and the cut positive electrode piece fully meets the industrial requirements, and is more suitable for the industrial promotion of the pole piece cutting.
- laser cutting,
- lithium-ion power battery,
- positive electrode,
- negative electrode,
- burr,
- heat-affected zone (HAZ)

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References(17)

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