Development Of High Power Power Battery System For New Energy Vehicles

Aiming at vast energy consumption in the power battery conversionabout the new fuel automobile,the paper adopts DSC(digital signalcontroller) TMS320F28335as controller, three phase voltage sourcerectifier (VSR) and bi-directional DC-DC（BDC）converter as hardwareframework,double loop(current inner loop and voltage outer loop)decoupling based on space vector pulse width modulation(SVPWM) andsynchronizing half-bridge phase shifting as controlling strategies,torealize the charge and discharge feedback to the grid efficiently.Firstly, the paper builds mathematical model of three VSR andanalyses the working principle,secondly，elaborates the realizationof the SVPWM in the DSC,meanwhile,elaborates working principles undercharge-discharge mode respectively of the BDC and the parameters’design,moreover,expounds software flow charts, offers hardware circuitsand its function, builds the platform of the system and provides relatedsignal waveform，finally，experiments show that scheme can realize thesinusoidal current wave in the grid side as well as charge and dischargefeedback to the grid efficiently.