Parametric design of pure electric vehicle battery capacity and battery management system

In this paper,the method of choosing battery capacity and number for electric vehicle was analyzed.Based on these parameters,a corresponding battery management system(BMS) was designed,which could monitor the parameters when the battery was working.Taking the electric vehicle in the project for example,the battery capacity and number was determined with the above method.The electric vehicle tests show that the chosen battery package can satisfy all the dynamic characteristics of the vehicle,for example,the max.speed,accelerating ability,grade ability and durative distance.The BMS can monitor SOC,total voltage,total current and temperature of battery package in real-time accurately,so that the electric vehicle can work reliably and safely.