New energy vehicles are one of the seven strategic emerging industries in my country and have become an important driving force for the transformation and upgrading of the automobile industry. no doubt. As an important link in the downstream of my country’s new energy vehicle industry chain, charging piles have very broad prospects under the strong support of national policies and market demand.

Definition and classification of new energy vehicle charging piles

Electric vehicle charging piles are charging equipment installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and residential parking lots or charging stations to provide power guarantee for various types of electric vehicles according to different voltage levels.

The classification of electric vehicle charging piles is most common in terms of installation location and charging method. According to the installation location, it can be divided into public piles, special piles, and private piles; according to the different charging methods, it can be divided into: slow charging (AC charging), fast charging (DC charging), battery replacement (power exchange) and wireless charging.

DC charging pile: DC electric vehicle charging station, commonly known as “fast charging”, is a power supply device that is fixedly installed outside the electric vehicle and connected to the AC power grid to provide DC power for the non-vehicle electric vehicle power battery. The input voltage of the DC charging pile Adopt three-phase four-wire AC380V±15%, frequency 50Hz, output adjustable DC, directly charge the power battery of electric vehicle. Since the DC charging pile adopts a three-phase four-wire power supply, it can provide sufficient power, and the output voltage and current can be adjusted in a wide range, which can meet the requirements of fast charging.

AC charging pile: AC electric vehicle charging pile, commonly known as “slow charging”, is fixedly installed outside the electric vehicle and connected to the AC power grid to provide AC power for the on-board charger (ie, charging pile) of the electric vehicle. A charger that is fixedly installed on an electric vehicle) power supply device. The AC charging pile only provides power output and has no charging function. It needs to be connected to an on-board charger to charge an electric car. It is equivalent to just playing the role of controlling the power supply.