Engineering Commons^™

Experimental Strain Measurement In Ultrasonic Welding Of Battery Tabs, Chen Chen

Wayne State University Theses

Lithium-ion battery is one the most popular types of batteries currently used in electric

vehicles. To meet the power requirement, hundreds of Lithium ion battery cells are connected together before being assembled into a battery pack. Ultrasonic welding is the most widely used joining technology to connect battery cells together. In an ultrasonic welding process, high frequency oscillation is used to generate small relative motions between sheet metals to be welded, and produce solid-state bonds between the sheet metals clamped under pressure. One of the major issues for battery pack ultrasonic welding is that sometimes the welding process damages the …