The role and coordination principle of electric vehicle charging cables in charging piles

China [CN]

The role of the electric vehicle charging cable in the charging pile is to connect the electric vehicle and charge, transmit energy and signals, and realize the charging of the electric vehicle.

The principle of cooperation between electric vehicle charging cables and charging piles includes the following aspects:

Interface standardization: In order to ensure that different brands of electric vehicles can use the same charging pile for charging, the International Organization for Standardization and governments of various countries have issued a series of specifications to unify the shape, size and electrical characteristics of the charging interface, such as the European Mennekes standard, American SAE J1772 standard, Chinese GB/T standard, etc.

Communication protocol: Two-way communication is required between charging piles and electric vehicles to determine charging status, charging speed, power and faults. Information communication protocols include physical layer, data link layer and application layer, such as the European IEC 61850 standard, The IEEE 802.11 standard in the United States, the CAN standard in China, etc.

Safety protection: Both the charging cable center and the car charger center have protective measures, including overload protection, short circuit protection, over temperature protection, leakage protection, etc. At the same time, during the plugging and unplugging process, the charging cable and charging pile will automatically power off to ensure user safety.

Charging mode: The charging mode includes DC fast charging, AC fast charging and AC slow charging. According to different charging modes, the electrical characteristics between charging piles and electric vehicles are different, and corresponding matching equipment is required to realize charging.

Through the above cooperation principles, the electric vehicle charging cable can realize safe, efficient and standardized charging services in the charging pile, which provides convenience for the promotion and popularization of electric vehicles.

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