Abstract

With the development of electric vehicle industry, the charging compatibility between charging facilities and electric vehicles has become the focus of attention of charging operators, charging facilities manufacturers, electric vehicle manufacturers and users. For electric vehicle DC charging, the communication protocol between the DC charger and electric vehicle plays an important role in the interoperability of chargers and vehicles, which is the basis for realizing charging information exchange and charging control, and is the guarantee for safe charging of DC electric vehicles. This paper firstly introduces the charging time-sequence and communication protocol between DC chargers and electric vehicles, then designs the DC charger protocol conformance testing system, which can verify the communication message of dc charging communication protocol, the timeout processing of BMS message, the consistence of charging output, and the abnormal processing of vehicle charging. Currently, the system has been widely used in the field test and laboratory test for DC chargers with significant effect.

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