Research Progress on Laser Welding Technology of Copper Aluminum Dissimilar Materials for New Energy Vehicle Batteries

With the rapid development of the new energy vehicle industry, the laser welding technology of copper-aluminium dissimilar materials has received wide attention in battery manufacturing. This paper reviews the current study status of laser welding technology for Cu-Al dissimilar materials, focusing on the analysis of thermal behaviour, molten pool morphology, performance metrics of welded joints and the application of numerical simulation during the welding process. By summarising the research progress at home and abroad, the application prospect and future research direction of this technology in new energy vehicle battery manufacturing are discussed.