Development Of Electric Vehicle On-Board Charger Test System

With the growing demand for cars, humans is facing inceasingly seriousenvironmental and energy crisis. In order to solve these problems, more peoplepay attention to electric vehicles, some countries and the major automobilecompanies in our planet have speeded up the development on electric vehicles.The infrastructure is the premise, as an important part of electric vehicle industry,the Electric Vehicle On-board Charger Test System designed in this paper is anessential tool to find changes in on-board charger, and is also significant forpromoting the popularization of electric vehicles.The Electric Vehicle On-board Charger Test System is based on theSTM32F103ZET6, and it can control the charger, programmable voltage sourceand electronic load via the specific communication interface and associatedcommands and protocols, and realize a rapid automatic test, and use a touchscreen to achieve a friendly human-computer interaction. Measured parametersand functions include current stabilizing precision, voltage stabilizing precision,current stabilizing error, voltage stabilizing error, overcurrent limitationcharacteristics, overvoltage limitation characteristics, ripple factor, efficiency,power factor, short circuit protection, input overvoltage protection, andcommunication performance with BMS.In hardware, the On-Board Charger Test System consists of several modules,including test and controlling core, communication modules, measurementmodules, power modules, interactive module and other auxiliary circuits, andanti-jamming measures are taken between modules and test and controlling core;Software design can be described into two parts, system software and interfacesoftware, and software is the most part. System software also can be divided intosignal acquisition and processing, CAN communication, ModBus communication,and programmable power source and programmable electronic load controllingcommands, while programmable human-computer interface software is designedby supporting ArgusSoft.Finally, some test experiments and simulations are done to verify testfunctions and precision, results show that the test system can finish the task.