Design and simulation of power system for pure electric vehicle based on Matlab and Cruise
                                             QI Huan min, CUI Ya hui, TAN Xi feng, SONG Xu feng
       （School of Mechanical and Precision Instrument Engineering, Xi an University of Technology, xi an 710048, China）

Abstract: Aiming at the optimization of parametric design of a pure electric SUV vehicle power system, the research on the optimization of the parameters of pure electric vehicle power system, such as driving battery, driving motor, transmission mode and transmission parameters, was put forward. Design method based on automobile driving condition. According to the basic parameters of the vehicle and the target performance to determine the drive motor and power battery to the electric vehicle power index as a constraint to calculate the feasibility of the transmission ratio, with Matlab programming to calculate the vehicle power and 50 km/h constant speed conditions, the driving force of the vehicle was established by means of cruise software. The relationship between the transmission ratio and the energy consumption of the electric vehicle was calculated in the feasible area. The simulation results show that the simulation results are satisfactory. aims. The results indicate that this method can reasonably match the parameters of pure electric vehicle dynamic system and improve the power and energy consumption of pure electric vehicle.

Key words: pure electric vehicle(PEV); interval optimization; parameter matching; driving efficiency; cycle condition