What's the difference between DC charging pile and AC charging pile?

AC charging piles need car charger to charge, while DC fast charging piles don't need this equipment.

2. Different charging speeds

There is a big difference in charging speed between the two. It takes 8 hours for a pure electric vehicle (ordinary battery capacity) to be fully charged through the AC charging pile, while it only takes 2 to 3 hours through the DC fast charging pile.

3, the fast charging ability is different

AC charging piles provide power input for chargers of electric vehicles. Because the power of the car charger is not large, it is impossible to realize fast charging. DC fast charging pile is a kind of power supply device fixedly installed outside the electric vehicle and connected to the AC power grid, which can provide DC power for the power battery of the off-board electric vehicle. DC charging pile can provide enough power, and the output voltage and current can be adjusted in a wide range, which can meet the requirements of fast charging.

Extended data:

(1) AC charging pile:

The AC electric vehicle charging pile, commonly known as "slow charging", is a power supply device fixedly installed outside the electric vehicle and connected with the AC power grid to provide AC power for the on-board charger of the electric vehicle (that is, the charger fixedly installed on the electric vehicle). The AC charging pile only provides power output and has no charging function, so it needs to be connected to the vehicle charger to charge the electric vehicle. It is equivalent to just controlling the power supply.

Charging piles are currently divided into AC charging piles and DC charging piles. Single-phase/three-phase AC output by AC pile is converted into DC by vehicle charger to charge vehicle battery, and the power is generally small (including 7kw, 22kw, 40kw, etc. ), and the charging speed is generally slow, so it is generally installed in residential parking lots and other places.

(2) DC charging pile:

The charging station of DC electric vehicle, commonly known as "fast charging", is a power supply device which is fixedly installed outside the electric vehicle and connected with the AC power grid, and can provide DC power for the power battery of off-board electric vehicle. The input voltage of DC charging pile adopts three-phase four-wire AC 380 V? +/- 15%, the frequency is 50Hz, and the output is adjustable DC, which directly charges the power battery of electric vehicle. Because the DC charging pile is powered by three-phase four-wire system, it can provide enough power, and the output voltage and current can be adjusted in a wide range, which can meet the requirements of fast charging.

DC charging piles (or non-on-board chargers) directly output DC power to charge the on-board batteries, with high power (60kw, 120kw, 200kw or even higher) and fast charging speed, so they are generally installed in charging stations beside expressways.

References:

Baidu encyclopedia-charging pile