Implementation and Test Bench Development of GB/T 27930-2015 Communication Protocol for Electric Vehicle Charger

Abstract

Fast EV Chargers ensure safe and reliable charging with the exchange of digital data and signals between Electric Vehicles (EV) and Electric Vehicle Supply Equipment (EVSE). GB/T 27930-15 is one of the globally adopted communication protocols for DC EV Charging. Implementation methodology for the various aspects of GB/T 27930-2015 protocol for EVSE is detailed in this paper. Conformance testing of the developed communication modules is essential and a lab level pre-compliance test environment was developed using hardware and software modules. The test bench consists of digital controllers emulating EV and EVSE nodes, hardware to emulate the charging connector and a Graphical User Interface (GUI) for observing the communication sequence and data. The paper further details testing and evaluations using the test bench.