Nearly all EV batteries are shipped from overseas, exposing each individual cell to varying levels of contamination by the saline levels on ships. Without proper anode, cathode, and busbar cleaning these contaminants can result in poor or ineffective connections during the wire bonding process, which results in shorter or less efficient battery life.
It is possible to mechanically scrub or electropolish contaminated battery parts, however, these alternative methods come with environmental issues that lasers manage to bypass.
