The busbar is submerged in a chemical solution, and an electrical current is applied, depositing a thin layer of coating (tin, nickel or silver) onto the busbar's surface. Heavy duty laminated busbars are used to carry & transfer high voltage current within the vehicle electrical system. Depending on the dielectric strength required the busbars are insulated and sealed using various material selections including polyimide and tested to withstand the voltage. Busbars — solid metal conductors — are emerging as the technology of choice for EV charging harnesses and other high-voltage connections within a vehicle. The tin. High volume busbar production: employing craft precision. Along with other solutions for power management such as cooling and fuses, Mersen has created a powerful bundled product ofering for the protection and. Custom busbars, available in various models and sizes, manufactured via stamping, CNC bending, finishing, and insulation.