Electric and hybrid vehicle are clearly becoming a growing part of the automotive scene. Although electric and hybrid vehicle supply low or no emissions and conceivably low cost of fuel from the power grid, they will continue to deliver safely from here to there. Drive battery and drive motor are the key parts of electric and hybrid vehicle. The operational voltage of drive battery and drive motor always over 100 V, then High Voltage (HV) risk is the focus research scope of electric and hybrid vehicle safety.