Energy recovery for battery electric vehicles

An efficient energy recovery system for battery electric vehicles (BEVs) is developed and tested. The principle and characteristics are analysed in detail. Then the mathematical model is derived step by step. Combining the merits and the defects of H 2 optimal control and H ∞ robust control, the robust hybrid controller is designed to guarantee both the system performance and the robust stability. The comparative simulated and experimental results showed that the dynamic performance and robust stability of the proposed scheme were superior to those of the proportional-integral method; the vehicle recycled more kinetic energy during braking and the driving range was increased.