Study On The General Layout And Control Strategy Of Extended Range Electric Vehicle

At present, with the rapid development of automobile industry, car ownership is growingquickly, which makes our country environment and energy face severe challenges. Energy andenvironment problem is increasingly prominent, which restricts the sustainable developmentof automobile industry, so development of electric cars becomes an important way to protectthe safety of energy and the environment in our country. Extended range electric vehicle isa new energy-saving and environment-friendly automobile, and as a model of transition fromthe traditional internal combustion engine cars to pure electric vehicles, it is a new typeof electric cars that are widely used and have the prospect of industrialization most likely. Soit becomes a research hotspot of automobile industry at home and abroad.This design is completed under the projects funding of Xi’an technology bureau’s projectsmall pure electric training vehicles power system matching and optimization design (NO.CX1249④) and the central university innovation team project Key techniques research ofplug-in small electric training vehicles (NO.2013g3222004). The extended range electricvehicle we study in the paper is restructured on the basis of the traditional internal combustionengine vehicle. Firstly, the paper makes extended range electric vehicle compare withtraditional vehicle. And power system parameters are calculated and analyzed according to thedesign requirements of the vehicle. The paper compares and selects the vehicle key parts andcomponents, and makes the overall layout of vehicle power system. Secondly, the paperanalyzes the operation mode of the vehicle, determines the control strategy suitable for thevehicle according to the working mode, and establishes a operation mode switching module inMatlab/Simulink platform. Lastly, the paper makes modeling and simulation based on theoriginal model in the simulation software Curise. The paper makes motor module, extendermodule and power battery module model respectively, and then imports them into the wholevehicle model for simulation and analysis.From the simulation results we know, extended range electric vehicle’s maximum speed,0to30km/h acceleration time, maximum gradability and pure electric driving range arerespectively95.6km,16.4s,30.5%and90.3km. Finally, the vehicle power performance, thedriving range and economic performance have reached the design requirements.