Lithium ion battery, laser manufacturing method thereof and laser washing device

Abstract

The invention provides a lithium ion battery, a laser manufacturing method thereof and a laser washing device. Coatings at the specific surface positions of battery pole pieces can be eliminated efficiently, environmentally and stably at high quality, so that the manufacturing technology of the lithium ion battery is simplified, and the manufacturing efficiency is improved. The laser manufacturingmethod comprises the following steps: carrying out die cutting to manufacture a first battery pole piece with a lug; manufacturing a lithium iron phosphate coating with a first thickness on an aluminum foil base body; determining an area to be washed of the aluminum foil base body, and adopting picosecond pulse lasers to scan the lithium iron phosphate coating in the area to be washed in a linearlight spot manner, so that expansion and gasification occur on the lithium iron phosphate coating, the lithium iron phosphate coating is separated from the aluminum foil base body, and an area to bewelded separated from the lithium iron phosphate coating is formed; welding a pole piece in the area to be welded so as to form a second battery pole piece; and combining and connecting the first battery pole piece and the second battery pole piece so as to form the lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of surface coating cleaning, in particular to a lithium ion battery, a laser manufacturing method thereof, and a laser cleaning device. Background technique [0002] Since the 21st century, with the continuous development of the economy, the demand for new energy is increasing. Solar energy, wind energy, nuclear energy and chemical energy are all new forms of energy that can replace non-renewable energy. Lithium-ion batteries, as a form of chemical energy, have Small size, light weight, high discharge voltage, high specific energy and other advantages, although lithium-ion battery technology still has some defects, but commercial applications in the fields of consumer electronics and notebook computers are becoming more and more popular. In recent years, the competition for large-scale production of lithium-ion batteries in Asia has been increasing day by day, and the European Union has also found another wa...

AI Technical Summary

Problems solved by technology

Lithium manganate and ternary materials have large capacity, but lithium manganate has poor high temperature performance and low cycle life, and ternary materials are restricted by cost, safety and various factors

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