It is predicted that the global sales volume of EV charging equipment in China will reach 50,000 in 2014 and surge to 146,000 in 2016.
In 2013, the EV charger sales volume added up to 228,000 globally, out of which 17,600 was contributed by China.
The State Grid had founded 19,000 EV charging piles and 400 charging/battery swap stations, which also included 209 charging stations and 191 battery swap stations.
This was in contrast to 3,528 charging piles and 118 charging/battery swap stations established by China Southern Power Grid.
The charging system installed by Southern Power Grid lays stress on the construction of intelligent charging/battery swap service network in the Pearl River Delta region.
The charging stations and EVs are connected through the process of charging, which depends on identification and communication of charging port.
The standards for a charging port, which is an important part of all basic system, involve EVs, charging infrastructure and charging equipment.
Due to this factor, unification of domestic standards and coordination of world standards are necessary for promoting EVs.
EV charging ports can be divided into four systems, which have different standards under various conditions of power supply.
In the case of AC power, the IEC (International Electrotechnical Commission) standard has more possibility of uses.
However, GB 20234 and SAE J1772 are partly adopted by China and the United States in the four regions where EVs are rapidly deployed; under the DC power supply, Europe fully adopts the IEC standard, China GB 20234, the U.S. SAE+IEC and Japan CHAdeMO+IEC.
Moreover, only Europe and the U.S. recommend the combined charging port application.
Electric vehicles need to be charged by charging stations and hence they are essential hardware component of an entire EV system, supporting charging facilities.