2010 Battery cap welding
Ultrasonic battery welding demonstration. Weld stacked electrode sheets, tabs and current collectors for Li-ion pouch cells and EV applications.
Battery cap welding differs from tab welding: the cap is a thicker stamped part that has to join the case or the terminal post and stay leak-tight. As the horn presses on the cap edge, energy must pass through a thickness step, so this operation is usually closed by displacement rather than pure energy control to avoid crushing the sealing face.