Parameter design and optimization of electric vehicle

Improving the efficiency of powertrain system is a critical issue for electric vehicle´s technologies. Suitable parameters of this system are beneficial to enhancing the fuel economy and extending the mileage since battery on electric vehicle has a limit of capacity. In this paper, we establish models of vehicle system and components in MATLAB/Simulink to study parameter design for electric vehicle. We apply genetic algorithm in optimizing parameters of the prototype. Control strategy is also discussed to obtain the optimal performance of electric vehicle. We use simulations to test our proposed design. The electric vehicle can meet the requirement of power and fuel economy characteristic. Improvement is obtained through optimizing the parameters of transmission. These results show an agreement between the theory and our design.