Research on Braking Force Distribution Strategy of Composite Braking System of Electric Vehicle

Abstract

* Corresponding author Abstract—Based on analyzing the necessity of research on composite braking system of electric vehicle and its braking force distribution strategy, according to the ECE regulations and the requirements of braking stability, the optimized braking force distribution strategy and control logic are proposed for a certain type of selected electric vehicle with front wheels drive. The mathematical models of electric motor, battery, braking force distribution and so on of electric vehicle are established, and the simulation models of composite braking system of electric vehicle are established based on MATLAB/Simulink software. The simulation analyses on the change curves of braking speed, braking deceleration, braking distance, battery SOC, braking total energy and recycling energy with the change of braking time are carried out respectively when the initial speed is 20km/h and 50km/h and the braking intensity is 0.1 and 0.3. The simulation results validate that the braking force distribution strategy and mathematical models proposed are correct and feasible, which provide a theoretical basis for the follow-up study.