The principle of AC charging pile
AC charging pile, the essence is a socket with control, the output is AC power, the need for the on-board charger to carry out transformer rectification, limited by the power of the on-board charger, the general power is small, 3.3 and 7kw most.
Functional characteristics of AC charging pile
(1) The human-computer interaction interface adopts a large-screen LCD color touch screen, and the charging can be selected from 4 modes: fixed power, fixed time, fixed amount, and automatic (until full); Displays the current charging mode, time (charged time, remaining charging time), power level (charged power, power to be charged) and current billing information.
(2) Support a variety of payment methods such as swiping cards and scanning codes.
(3) Meet the latest national standards such as GB/T 20234.1-2015, GB/T 20234.2-2015, GB/T 18487.1-2015, etc.
(4) Touch color screen display, friendly man-machine interface, easy to operate and easy to maintain.
(5) The communication interface is abundant, and it is compatible with all vehicle BMS protocols and charging background protocols.
(6) Perfect protection function: over-voltage protection, under-voltage protection, overload protection, short-circuit protection, leakage protection, etc.
The difference between DC charging piles and AC charging piles
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 adopts three-phase four-wire AC380V±15%, the frequency is 50Hz, and the output is adjustable direct current, which directly charges the power battery of the electric vehicle. Since the DC charging pile adopts three-phase four-wire power supply, it can provide sufficient power, and the output voltage and current adjustment range is large, which can realize 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 on-board charger of the electric vehicle (that is, the charger fixed on the electric vehicle). The AC charging pile only provides power output, has no charging function, and needs to be connected to the on-board charger to charge the electric vehicle. It is equivalent to just playing the role of controlling the power supply.
The difference between the two: To put it simply, AC charging piles need to be charged with the help of on-board chargers, while DC fast charging piles do not need this equipment. There is a big difference in charging speed between the two, with a pure electric vehicle (normal battery capacity) fully discharged and fully charged through an AC charging station taking 8 hours, while it only takes 2 to 3 hours to pass through a DC fast charging station. The AC charging pile provides power input to the charger of the electric vehicle, and because the power of the on-board charger is not large, fast charging cannot be realized.