For new energy vehicles, the charging mode mainly adopts DC charging with fast charging DC charging pile and AC charging with AC charging pile or portable charging gun.  Among them, DC charging pile directly provides DC power for electric vehicle power battery, with large output power and fast charging speed. 

The AC charging pile provides AC power for the on-board electric vehicle charger, which has low output power but low installation requirements.  Portable charging gun is a portable charging device, output AC power, use the rated current of no more than 16A standard plug as its own power plug, can be directly charged at home or places with standard sockets, about 8 to 10 hours can be filled.

When there is no condition to install charging piles or fixed charging facilities, it is particularly important to equip portable charging guns for emergency energy replenishment of electric vehicles.  In addition, the portable charging gun outputs 220V single-phase alternating current as the power supply and converts alternating current into direct current to charge the battery through the vehicle-mounted charging machine, which can reduce the impact on the battery while ensuring convenience and ensure the battery life to a greater extent. It is a stable and safe charging method.