Abstract
This study investigates the solidification cracking susceptibility of Cu-Steel laser welds used for cylindrical lithium-ion battery busbars. The research utilized green laser technology with three distinct beam patterns: Linear, Spiral + Wobble, and Circular + Wobble. Additionally, Ni-P coating layers of varying thicknesses (10, 50, 100 μm) were applied to..... More

Abstract
Copper is widely utilized in electric vehicle batteries due to its excellent electrical conductivity, lightweight, and excellent corrosion resistance. However, copper has a high reflectivity of about 97% for infrared lasers, which makes it difficult to achieve stable welding quality. This study investigated using a green laser to weld nickel-coated..... More