Introduction to GB/T’s new energy vehicle charging interface

In view of the environmental disadvantages of traditional petrochemical energy and the concerns of various countries about energy security, new energy vehicles are booming, setting off a revolution in replacing fuel vehicles with electric vehicles on a global scale. Various countries and economic organizations have formulated corresponding charging interface standards. As an automobile OEM and charging equipment manufacturer, understanding and matching the standards of each charging interface is a task that must be completed. As domestic new energy vehicles go global, the GB/T standard also goes global. This article will introduce the charging interface based on the standards published in 2015.

AC Charger standard: GB/T

AC Charger standard

L1: AC power supply, single phase – rated voltage 250V, rated current -10A/16A/32A;

Three-phase – rated voltage 440V, rated current -16A/32A/63A;

L2: AC power supply, three-phase – rated voltage 440V, rated current -16A/32A/63A;

L3: AC power supply, three-phase – rated voltage 440V, rated current -16A/32A/63A;

N: Neutral line, single phase – rated voltage 250V, rated current -10A/16A/32A;

Three-phase – rated voltage 440V, rated current -16A/32A/63A;

PE: Protective ground wire, connects the ground wire of the power supply equipment and the vehicle electrical platform;

CC: Charging connection confirmation (for vehicles);

CP: Control guide wire, used for information communication between charging equipment and vehicles, including charging status and charging current;

DC Charger standard: GB/T

DC Charger standard

DC+: DC power supply positive pole, connect the DC power supply positive pole and battery positive pole, rated voltage -750 V/1 000 V, rated current -80 A/125 A/200 A/250A;

DC-: DC power supply negative pole, connect the DC power supply negative pole and battery negative pole, rated voltage -750 V/1 000 V, rated current -80 A/125 A/200 A/250A;

PE: Protective grounding, connects the ground wire of the power supply equipment and the vehicle electrical platform;

A+: Low-voltage auxiliary power supply is positive, connected to the low-voltage auxiliary power supply provided by the off-board charger for electric vehicles;

A-: Low-voltage auxiliary power supply negative, connected to the low-voltage auxiliary power supply provided by the off-board charger for electric vehicles;

S+: Charging communication CAN_H, the communication line connecting the off-board charger and the electric vehicle;

S-: Charging communication CAN_L, the communication line connecting the off-board charger and the electric vehicle;

CC1: Charging connection confirmation (used for charging equipment end connection detection and electronic lock lock detection);

CC2: Charging connection confirmation (for vehicle side);

In September 2023, the Standards and Technology Management Department of the State Administration for Market Regulation issued new standards for charging equipment and interfaces,

revising and optimizing charging connection devices, DC charging interfaces, and high-power DC charging interfaces to comprehensively improve charging capabilities. Security and compatibility.

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