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A method for preparing lithium-ion battery pole pieces by laser cleaning

A lithium-ion battery, laser cleaning technology, applied to battery electrodes, cleaning methods and utensils, battery pack components and other directions, can solve problems such as perforation, increase in the defective rate of pole pieces, avoid direct contact, improve production efficiency, Avoid the effect of piercing

Active Publication Date: 2021-11-12
惠州赣锋锂电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, laser cleaning is mainly used to clean the pole piece coating in lithium-ion batteries, so as to prepare the grooves of the pole piece. Irradiated by high-energy-density beams to cause perforation, resulting in an increase in the defective rate of the pole piece

Method used

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  • A method for preparing lithium-ion battery pole pieces by laser cleaning
  • A method for preparing lithium-ion battery pole pieces by laser cleaning

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0036] A method for preparing lithium-ion battery pole pieces by laser cleaning, comprising the following steps:

[0037] Step 1: Determine the position of the lug groove on the pole piece as the center of the pole piece, the size is 11mm wide and 26mm long.

[0038] Step 2: Evenly coat the polyamide epoxy resin on the position of the lug groove in step 1.

[0039] Step 3: Coating the pole piece obtained in Step 2 with lithium cobaltate.

[0040] Step 4: The pole piece obtained in step 3 is cleaned by using an ND:YAG laser cleaning instrument to clean the organic coating and the active material coated on it in step 2, so as to prepare a pole piece.

[0041] The step four cleaning process can be further explained:

[0042] When cleaning the lithium cobaltate layer, use a laser with a frequency of 20kHz, a scan rate of 100 / mms-1, and a pulse width of 200ns for the first cleaning. When cleaning at the bottom of the lithium cobaltate layer, adjust it to 10kHz and a scan rate of ...

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Abstract

The invention discloses a method for preparing lithium-ion battery pole pieces by laser cleaning. The method for preparing lithium-ion battery pole pieces by laser cleaning includes the following steps: Step 1: Determine the specific position and size of the lug groove on the pole piece; Step 2: Coat the organic coating on the lug groove in step 1 position; step 3: coating the pole piece obtained in step 2 with an active material; step 4: cleaning the pole piece obtained in step 3 with a laser cleaning instrument to clean the organic coating in step 2 and the active material coated thereon, Thereby the pole piece is prepared. The method for preparing lithium-ion battery pole pieces by laser cleaning of the present invention improves the production efficiency of pole pieces and improves production efficiency.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a method for preparing lithium ion battery pole pieces by laser cleaning. Background technique [0002] Due to its high energy density, long service life, high voltage and good safety performance, lithium-ion batteries are widely used in the fields of electronic communication, energy storage and transportation. [0003] At present, laser cleaning is mainly used to clean the coating of the pole piece in lithium-ion batteries, so as to prepare the grooves of the pole piece. Irradiated by high-energy-density beams to cause perforation, resulting in an increase in the defective rate of the pole piece. Contents of the invention [0004] Based on this, it is necessary to address the above problems and propose a method for preparing lithium-ion battery pole pieces by laser cleaning. By adding an organic coating to the pole piece, the direct contact between the high-ener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/139H01M50/531H01M4/04B08B7/00
CPCB08B7/0042H01M4/0404H01M4/139Y02E60/10
Inventor 刘海戈志敏王乾韦向红黎莉
Owner 惠州赣锋锂电科技有限公司