Abstract:Battery is not only a key component of electric vehicles, which features the advantages of energy saving, low pollution and low-carbon emission，but also plays a prominent role as the joint of power and automotive industry. Under vigorous promotion of government, electric vehicle (EV) industry in China gets into fast growth period, and it also greatly promotes the construction of charging facilities, namely charging stations and piles for EV, so the charging of lots of EV will greatly impact on power grid and the impacts vary with the popularization level of EV, EV types, charging time and charging mode of EV as well as the difference in charging modes and charging characteristics of EV. This paper introduces four charging modes of electric vehicle batteries in the world: switching mode, wired slow charge, wired fast impulse and wireless charging. These four kinds of charging mode are in different stages of development, facing different problems and different development strategy. The current leading modes of electric vehicle manufacturers, the leading mode of power grid enterprises and the third party's leading mode of construction and operation enterprises are analyzed and compared.