Charging piles can be divided into AC charging piles and DC charging piles according to charging methods. AC charging power is small and charging time is relatively long. Small size, convenient for home installation and use. The DC pile has high power and fast charging speed, and is suitable for commercial use.
The AC electric vehicle charging pile is fixedly installed outside the electric vehicle and connected to the AC power grid. They are power supply devices that provide AC power to on-board chargers of electric vehicles (i.e. chargers fixedly installed on electric vehicles). AC charging piles only provide power output and do not have charging functions. They need to be connected to an on-board charger to charge an electric vehicle. It is equivalent to just controlling the power supply.
The single-phase/three-phase AC power output by the AC pile is converted into DC power by the vehicle charger to charge the vehicle battery. The power is generally small (3.7kw, 7kw, 22kw, etc.) and is generally installed in homes or communities.
DC electric vehicle charging station, commonly known as “fast charging”, is a power supply device that is fixedly installed outside an electric vehicle and connected to the AC power grid. It can provide DC power for off-board electric vehicle power batteries. The input voltage of the DC charging pile adopts three-phase four-wire AC 380 V±15%, frequency 50Hz, and the output is adjustable DC, which directly charges the power battery of the electric vehicle. Since the DC charging pile uses a three-phase four-wire system for power supply, it can provide sufficient power, and the output voltage and current can be adjusted in a wide range to meet fast charging requirements.
DC charging piles (or non-vehicle chargers) directly output DC power to charge the vehicle battery. They have larger powers (60kw, 120kw, 200kw or even higher) and faster charging speeds, so they are generally installed next to highways. charging station.
The difference between the two
To put it simply, AC charging piles need to be charged with a car charger, while DC fast charging piles do not require this equipment. There is a big difference in charging speed between the two. After a pure electric vehicle (ordinary battery capacity) is fully discharged, it takes 7 hours to be fully charged through an AC charging pile, while it only takes 2 to 3 hours through a DC fast charging pile. AC charging piles provide power input to the charger of electric vehicles. Since the power of the on-board charger is not large, rapid charging cannot be achieved. The DC fast charging pile is a power supply device that is fixedly installed outside the electric vehicle and connected to the AC power grid. It can provide DC power for the power battery of the off-board electric vehicle. The DC charging pile can provide sufficient power and has a wide adjustment range of output voltage and current. , which can meet the requirements of fast charging.