Laser Cleaning Machine in The Lithium-ion Battery Column of The Oxide Film Cleaning Applications

With the development and growth of the new energy electric vehicle industry, both new and old batteries will use laser cleaning machine, such as the cleaning of the welding seam, as well as the cleaning of the battery pole column of lithium-ion batteries. At present, the battery poles of lithium-ion batteries are mostly made of copper, which will produce oxide film after long-term use due to environmental problems. The researchers investigated the laser cleaning of the oxide layer of ion battery poles using a RFL-P50Q Q-modulated pulsed fiber laser. After laser cleaning, the connection performance and anti-corrosion performance of the carp ion battery poles were tested, showing that laser cleaning can remove the oxide from the battery poles, which reduces the contact resistance between the battery poles and the conductive strip and improves the contact performance, and the more severe the oxidation, the higher the reduction after laser cleaning.

For aluminum alloy welding edge 5um thick anodic oxide film, using the average power of 100 watts of pulsed laser cleaning, scanning speed of 10 mm / s, can completely remove the anodic oxide film layer, and weld forming uniform, weld surface flooded with metallic luster, weld without aggregated porosity, impurities and other internal defects. The tensile strength of the laser cleaned aluminum alloy joint is 298~303 MPa, and the tensile elongation at break is 6.2 percent ~6.5 percent . The performance range of laser cleaned welds and mechanical scraping welds is the same.
With the widespread use of electric vehicles, a large number of waste potassium ion batteries not only seriously pollute the environment but also cause a great waste of energy and resources. The researchers used a solid pulse laser to clean the solid electrolyte intermediate phase interface film accumulated on the cathode surface of potassium iron phosphate batteries, which causes the battery capacity decline, and determined through the analysis of the experimental results of scanning electron microscopy and Fourier infrared spectroscopy that the better cleaning conditions are: The pulsed laser energy density was 0.142 J/mm², and the remanufacturing of the used battery electrode sheet was achieved by laser cleaning.