What is the principle of AC charging pile?

What is the principle of AC charging pile? Ac charging pile, commonly known as "slow charge", is a power supply device fixed on the outside of 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). Ac charging pile only provides power output, does not have charging function. It needs to be connected to an on-board charger to charge the electric car. It acts as a control power source. What is the principle of AC charging pile? What is the structure of AC charging pile? Now let's see! Principle of AC charging pile: The AC charging pile is essentially a controlled socket that outputs alternating current and requires the on-board charger to perform its own voltage conversion rectification. Limited by the power of the on-board charger, the power is usually small, mostly 3.3 and 7 kw. The functional characteristics of AC charging pile

(1) The human-computer interface adopts a large-size LCD color touch screen, and four charging modes can be selected: constant power, fixed time, fixed amount, automatic (until full); Displays the current charging mode, time (charging time, remaining charging time), power (charging power, pending charging power), and current charging information.

(2). Support credit card, code scanning and other payment methods.

(3) Comply with GB/T 20234.1-2015, GB/T 20234.2-2015, GB/T 18487.1-2015 and other national standards.

(4) Touch color screen display, friendly human-machine interface, easy to operate and maintain.

(5) Rich communication interface, compatible with all vehicle BMS protocol and charging background protocol.

(6) Complete protection function: overvoltage protection, undervoltage protection, overload protection, short circuit protection, leakage protection, etc. Dc charging station: DC electric vehicle charging station, commonly known as "fast charging", is a power supply device fixed on the outside of the electric vehicle and connected to the AC grid to provide direct current for the power battery of the non-on-board electric vehicle. The input voltage of the DC charging pile is three-phase four-wire AC380V±15%, the frequency is 50Hz, and the output is adjustable DC, which directly charges 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 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 a power supply device fixed on the outside of 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). Ac charging pile only provides power output, does not have charging function. It needs to be connected to an on-board charger to charge the electric car. It acts as a control power source. The difference between the two: In short, AC charging piles need to be charged using an on-board charger, while DC fast charging piles do not need this device. There is a big difference in charging speed between the two. Pure electric vehicles (with ordinary battery capacity) take 8 hours to fully charge through AC charging piles, while it only takes 2 to 3 hours to fully charge through DC fast charging piles. AC charging pile provides power input to electric vehicle charger. Because the car charger power is not large, can not achieve fast charging.