A high voltage battery is an alternative source of energy or fuel. The high voltage batteries are used to generate more power than that of ordinary batteries. Due to rapid charging capabilities and high power output allows these batteries to be utilized in hybrid and electric vehicles. These batteries have to operate under very immense conditions and environment so it can provide energy to the electrical power train for the vehicle propulsion. The high voltage battery used in automotive (electric vehicle (EV’s), hybrid electric vehicle (HEV’s), plug-in hybrid electric vehicle (PHEV’s) and pure battery electric vehicles (BEVs)) is a set of battery packs combining various multiple functions and components which involves an application of electrochemical and mechanical principles. Batteries used in the vehicles are having many separate cells in an order with a series connections. The global high voltage battery market for automotive is expected to grow durin...