Battery Cell Laser Welding

Battery PACK quality depends on more than the cells. The connections between them matter, too.
Filmed in our production workshop, this video shows the cell laser welding stage of battery PACK manufacturing.
Laser energy joins the cell connection points to the busbars. Accurate positioning, close contact between joining surfaces, and controlled heat input are important for achieving consistent welds.
The objective is a connection with adequate mechanical strength and low electrical resistance. Weld quality must also be verified through appropriate inspection and testing.
For energy storage buyers, understanding the joining process and its quality controls is an important part of evaluating battery PACK manufacturing capabilities.
Which welding quality indicators do you prioritize when evaluating a supplier?