DC charging pile: DC electric vehicle charging station, commonly known as fast charging, is a power supply device that is fixed outside the electric vehicle, connected to the AC power grid, and can provide DC power for the power battery of non-vehicle electric vehicles. The input voltage of the DC charging pile is 15% of the three-phase four-wire AC380V± frequency of 50Hz, and the output is adjustable DC to directly charge the power battery of the electric vehicle. Because the DC charging pile adopts three-phase four-wire power supply, it can provide sufficient power, and the output voltage and current adjustment range are large, which can meet the requirements of fast charging.
AC charging pile: AC electric vehicle charging pile, commonly known as slow charging, is a power supply device that is fixed outside the electric vehicle and connected to the AC power grid to provide AC power for the electric vehicle on-board charger (that is, the charger fixed on the electric vehicle). The AC charging pile only provides power output, but has no charging function, and needs to be connected to the on-board charger to charge the electric vehicle. This is equivalent to controlling the power supply.
The difference between the two: To put it simply, AC charging piles need to be charged by an on-board charger, while DC fast chargers don't need this device. There is a big difference between the two in terms of charging speed. After the pure electric vehicle (ordinary battery capacity) is fully discharged, it takes 8 hours to be fully charged through the AC charging pile, and only -3 hours to the DC fast charging pile. The AC charging station provides power input to the EV charger. Due to the low power of the on-board charger, fast charging is not possible.