An FPGA Based Modular System for Electric Vehicle Charging Pile Field Testing

The installation and deployment of charging infrastructures are essential for the rapid growth of electric vehicles (EVs). Thus, designing efficient and convenient testing tools for charging infrastructure has become an emerging research target. This paper presents the theory, implementation and experimental results of an FPGA based modular system used to test EV charging piles in field maintenance. Two different field testing methods are described in first. The block diagram is given to introduce system components, including a charging interface emulator, a metrology circuitry, a data acquisition circuitry, a BMS emulator, battery packs and a programmable load. Control logics, energy metering, digital signal processing, ADC interfacing and CAN bus communication are all implemented in one FPGA. The experimental data indicate that the digitalized traditional filter has an overwhelming advantage than the statistical filters.