A Control Strategy for Braking Energy Distribution and Regenerative Braking in an SP-HEV

The regenerative braking system is a unique system in electric vehicles and hybrid electric vehicles.The system can restore the kinetic energy and potential energy,during start and accelerating,into battery through electrical machines.The focus of this paper is on Changfeng CFA6470E HEV.Based on the braking theory of conventional vehicles and security braking and high efficient energy recovery,a control strategy for braking energy distribution and regenerative braking of an SP-HEV is proposed.The ideal braking force distribution is used in the front axle and real axle braking force distributions.After the front axle and real axle's braking force is distributed,regenerative braking and friction braking are assigned.The characteristics of motor and battery's life have been taken into account in the quadratic distribution method,The motor's speed and SOC are taken as the braking power's influencing factors.ADVISOR2002 is redeveloped for the simulation model.The simulation result shows that the control strategy for braking energy distribution and regenerative braking can satisfy demand for vehicle braking and extend the life of battery.The strategy proves to be practical.