Cell-Internal Contacting of Prismatic Lithium-Ion Batteries Using Micro-Friction Stir Spot Welding

The reliable production of high-quality lithium-ion battery components still poses a challenge, which must be met to cope with their rising demand. One key step in the sequence is process cell-internal contacting, during electrode carrier foils anode and cathode are joined arrester. This usually done ultrasonic or laser beam welding. Both joining processes, however, show limitations concerning quality weld. paper presents new approach for contacting by using micro-friction stir spot Welding experiments were conducted joints high mechanical strengths produced. It was also shown that large stacks foil numbers 100 can only few tenths second. therefore especially interest fast large-scale cells other types high-energy-dense cells.