AC charging station, commonly known as "slow charging", is a power supply device that is fixedly installed on the outside of an electric vehicle and connected to the AC power grid, providing AC power to the on-board charger of the electric vehicle (i.e. the charger fixedly installed on the electric vehicle). The AC charging station only provides power output and does not have charging function. It needs to be connected to a car charger to charge the electric vehicle. It is equivalent to controlling the power supply. What is the principle of communication charging stations? What is the structure of an AC charging station? Now let's take a look!
Principle of communication charging station:
The AC charging station is essentially a controlled socket that outputs AC power and requires the onboard charger to perform its own voltage conversion and rectification. Due to the power limitation of the car charger, the power is usually small, mostly 3.3 and 7 kW.
The functional characteristics of communication charging stations
(1) The human-computer interaction interface adopts a large-sized LCD color touch screen, which can select four charging modes: constant power, fixed time, fixed amount, and automatic (until fully charged); Display the current charging mode, time (charging time, remaining charging time), power (charging power, waiting charging power), and current billing information.
(2) . Support multiple payment methods such as card swiping and QR code scanning.
(3) Complies with GB/T 20234.1-2015 National standards such as GB/T 20234.2-2015 and GB/T 18487.1-2015.
(4) Touch screen color display, user-friendly human-machine interface, easy to operate and maintain.
(5) Rich communication interfaces, compatible with all vehicle BMS protocols and charging backend protocols.
(6) Complete protection functions: overvoltage protection, undervoltage protection, overload protection, short circuit protection, leakage protection, etc.
DC charging station: A DC electric vehicle charging station, commonly known as "fast charging", is a power supply device that is fixedly installed outside the electric vehicle and connected to the AC power grid, providing DC power to the power battery of non vehicle mounted electric vehicles. The input voltage of the DC charging station is three-phase four wire AC380V ± 15%, with a frequency of 50Hz. The output is adjustable DC, which directly charges the power battery of the electric vehicle. Due to the use of three-phase four wire power supply in DC charging stations, sufficient power can be provided, and the output voltage and current can be adjusted over a large range to meet the requirements of fast charging.
AC charging station: AC electric vehicle charging station, commonly known as "slow charging", is a power supply device that is fixedly installed outside the electric vehicle and connected to the AC power grid, providing AC power to the electric vehicle on-board charger (i.e. the charger fixedly installed on the electric vehicle). The AC charging station only provides power output and does not have charging function. It needs to be connected to a car charger to charge the electric vehicle. It is equivalent to controlling the power supply.
The difference between the two: In short, the AC charging station requires the use of a car charger for charging, while the DC fast charging station does not require this device. There is a significant difference in charging speed between the two. A pure electric vehicle (with normal battery capacity) takes 8 hours to fully charge through an AC charging station, while it only takes 2 to 3 hours to fully charge through a DC fast charging station. The AC charging station provides power input for the electric vehicle charger. Due to the low power of the car charger, fast charging cannot be achieved.