AC charging facilities are devices that provide AC power for electric vehicles, generally composed of repeaters/contactors, control guidance circuits, leakage protection circuits, overcurrent and overvoltage protection circuits, metering modules, lightning protection modules, communication modules, human-computer interaction interfaces, etc., with rated capacity of 2.2kW (220VAC, 10A), 3.3kW (220VAC, 16A), 6.6kW (220VAC, 32A) and 22.4kW (380VAC, 63 A) and other categories. The charging connection device is the physical transmission medium between the charging device and the electric vehicle.
The physical size, mechanical structure, and electrical characteristics of the charging connection device used for charging shall comply with GB/T 20234.1-2015 "Connecting Device for Conductive Charging of Electric Vehicles Part 1; General requirements", GB/T 201234.2-2015 "Connecting devices for conductive charging of electric vehicles Part 2: AC charging interface" to ensure the physical adaptability of the charging connection. There are three types of connection devices: A, B, and C. According to the latest standard GB/T18487.1-2015 "Electric Vehicle Conductive Charging System Part 1: General Requirements", only charging mode 2 and mode 3 are applicable to AC charging, and Table 1 shows the conditions for the use of two charging modes. Ineligible charging will result in the electric vehicle being unable to be charged, or in serious cases, it may cause a safety accident.