Research On Brake Energy Recovery And Optimal Management Strategy For Pure Electric Vehicles

Although pure electric vehicles have prominent advantages in environmental protection and the motor technology has been perfected,the competitive disadvantage of pure electric vehicles still lies in their insufficient endurance and high relative prices.Brake energy recovery technology is an important energy-saving way for electric vehicles.Used motors to recover part of the braking energy can effectively improve energy utilization and increase the car’s driving mileage.In this paper,in order to verify the actual effect of the flywheel energy storage device,a pure electric vehicle model design with an energy storage flywheel was carried out,and simulation experiments were carried out,which reduced the development cost and time compared with the vehicle design The application of flywheel energy storage devices in pure electric vehicles provides certain reference and experience.This paper introduces the basic theory of pure electric vehicle braking energy recovery in detail.On this basis,a braking energy recovery device with a flywheel energy storage device is proposed.Front and rear wheel force analysis,researched the pure electric vehicle braking force distribution principle and common regenerative braking force distribution strategy,and formulated the braking energy recovery control strategy applicable in this paper.Used MATLAB / Simulink to build the model of pure electric vehicle braking system components,embed the built model into ADVISOR2002 software,and carry out simulation analysis.In order to verify the effectiveness of the braking energy recovery system designed in this paper,three typical cycle conditions of Japanese 1015,American UDDS and European NEDC were selected for simulation analysis.The simulation results show that the pure electric vehicle with the flywheel energy storage device designed in this paper can improve the energy recovery rate of the pure electric vehicle.Its energy efficiency rate is reduced by 4.1%,which reduces energy loss and improves the driving range.