Electric vehicles as the green environmental protection vehicles, they will occupy the important position in the vehicle of the future market, to speed up the safety of the electric vehicle research in promoting the promotion of the electric vehicle plays a very important role. This essay mainly analyses the power system of electric vehicles to crew member of the damage caused by the explosion, the burning of the battery, electrolyte leakage and the battery harmful gas damage, release the collision of the electric vehicle security hidden danger. Because of our country about electric vehicle safety standards and laws and regulations is not perfect, to speed up the safety of the electric vehicle research, continuously improve the safety performance of the electric vehicle, promote the electric vehicle to use in our country and improve the electric vehicle safety standard and related laws and regulations plays a positive role.