The cumulative annual growth rate of market share of electric vehicles is expected to touch 15% to 20% by 2020. Apart from PHEV, BEV and HEV vehicles, hybrid and eco drive vehicles are also contributing to this growth. However, the drivers of this amazing growth trend are dependent upon quite a number of factors. Electric load, and power of electric system impact the performance and acceptance of electric vehicles to greater extent. Thus, high voltage and high powered electric vehicles are making their entry to locomotive market each year. The performance with respect to energy efficiency, power to weight ratio, temperature performance, and overall lifecycle of these vehicles are dependent on battery management system and circuit protection of these locomotives to a considerable extent.