Modeling And Simulation Research On Pure Electric Vehicle With Dual Energy Source System

The power supply and battery life of pure electric vehicles is a research hotspot in recent years.Pure electric vehicles currently on the market rely on a single power battery to provide vehicle power.Pure electric vehicles with a single energy source generally have problems such as poor power performance,short battery life,and insufficient cruising range.Therefore,on the basis of analysis and comparison,the supercapacitor and the power battery are selected to form a dual energy source.Although the energy stored in the supercapacitor itself is very limited,it cannot provide the energy demand of the electric vehicle alone,but the super capacitor has the advantages of fast charging speed,long cycle life,high intensity of discharge current,and high temperature resistance.Therefore,this paper takes the pure electric vehicle as the background model,combines the power battery and the super capacitor into a dual energy source,and conducts research on simulation and modeling.First of all,the development of pure electric vehicles is expounded,and the advantages and research status of dual-energy pure electric vehicles are described.The characteristics of power sources and supercapacitors are determined by analyzing the characteristics of power sources.Then,according to the relevant regulations formulated by the state in the field of pure electric vehicles,the practical application parameters of supercapacitors,power batteries and drive motors have been determined through calculation.The simulation model of supercapacitor,power battery and drive motor is established by MATLAB/Simulink.Through the analysis of charge and discharge of electric vehicle power source,this paper has developed a dual energy source control strategy.Finally,use the vehicle simulation software ADVISOR to simulate.The platform does not have a dual energy model,and it is redeveloped and analyzed.The simulation results show that the capacity of the dual-energy source of pure electric vehicle designed in this paper is reasonable and can achieve the specified performance goal.The fuzzy control strategy is also expected to achieve the expected results.The advantages of the dual energy source are obvious.Under the management of the fuzzy control energy management strategy,the working state of the power battery is improved,the energy consumption of the power battery and the super capacitor is significantly reduced,and the life of the power battery can be effectively extended.The simulation research and fuzzy control energy management strategy can provide a theoretical basis for the application of dual energy sources in new energy vehicles.