Applications of Ultrasonic Metal Welding Machines in the Lithium Battery Industry

Ultrasonic metal welding is a mainstream process in lithium battery manufacturing, widely utilized for welding electrode tabs to electrode sheets in cylindrical batteries, pouch-type polymer batteries, and power/energy storage batteries.
Cell Tab Spot Welding: The welding of positive and negative copper/aluminum foils to nickel strips or electrode tabs constitutes a core process in battery cell packaging.
Busbar Connection: The collective welding of multiple electrode tabs and the spot welding of nickel busbars establish the internal conductive pathways within a battery module.
Terminal Welding: The welding of battery cell posts to external lead-out tabs and connecting copper/aluminum plates.
Battery PACK Assembly: The spot welding of nickel connection strips between individual cells, as well as the welding of leads to the battery protection board.
Industry Advantages
As a low-temperature welding process, it prevents thermal damage to the battery separator and cell packaging film. The resulting weld joints exhibit low internal resistance and stable conductivity, while remaining free from solder contamination. This technology effectively meets the demands for high-volume, automated production of power batteries, energy storage systems, and digital lithium batteries. Furthermore, it enables the welding of dissimilar metals-such as copper, aluminum, and nickel-making it perfectly compatible with the diverse electrode materials utilized in lithium battery manufacturing.