Study on control strategy of optimal braking energy recovery for pure electric bus

In order to fully recover the braking energy of electric vehicles in the braking process,to extend the driving range and to save energy,the control strategy of optimal braking energy recovery for rear-drive pure electric bus is studied. By analyzing the structure of the braking energy recovery system and considering the restrictions of drive motor and power battery for the size of the motor braking force,a control strategy for optimal braking energy recovery is proposed to recycle braking energy as much as possible on the premise of ensuring the braking safety. The vehicle simulation model is built and a simulation is conducted by using an integrated simulation platform of Cruise and Simulink. The simulation results show that the proportion that recyclable braking energy accounts for the kinetic energy consumed in the process of braking can reach 24. 7% and the proportion that recyclable braking energy accounts for the braking energy can reach 36. 2% by using this control strategy of braking energy recovery in typical urban driving cycle of China. The effect of energy saving is obvious.