Research on Ultrasonic Spot Welding Technology for Aluminum Pole Ears of Cylindrical Lithium Batteries
Ultrasonic spot welding technology is a high-efficiency,reliable,and environmentally friendly solid-phase connection technology,which is a key technology in the manufacturing process of cylindrical lithium batteries.However,there is currently limited research on the mechanism of ultrasonic spot welding connecting the pole ears and cover plates of cylindrical lithium batteries.This article combines welding process simulation and experimental verification to study the process of ultrasonic spot welding connecting battery pole ears and cover plate guide plates.The main analysis is the influence of welding pressure and welding time,as well as the changes in welding strength after battery cycle testing.The results indicate that during the welding process,when other conditions are constant,the welding strength shows a trend of first increasing and then decreasing with the increase of welding pressure and welding time.When the welding pressure is 0.3 MPa and the welding time is 0.04 s,the welding effect is optimal,and the maximum tensile shear force of the pole ear is 45.8 N;Perform battery cycling tests on the welded pole ears,and under the optimal process parameters,the welded pole ears can still maintain good welding quality after cycling tests.
Ultrasonic weldingCylindrical lithium batteryAluminum pole earmechanical property
NETL
NSTL
万方数据
维普
