Study On Energy Management Of The Parallel Hybrid Electric Vehicle

With the problems of global resource shortage and environmental pollution,the emergence of energy saving and new energy vehicles have greatly improved the fuel consumption and exhaust emissions of auto industry,The research and development of hybrid electric vehicle will play an important role in the future development of auto industry.As the key technology of hybrid electric vehicle,energy allocation control plays an important role in improving fuel economy performance.Good energy distribution strategy is not only to improve the fuel economy performance of the vehicle but also take battery balanced,and thus enhanced the work efficiency and service life of the battery,so hybrid electric cars will can satisfy energy conservation and emissions reduction and reduce the overall cost.In this paper,the energy allocation of parallel hybrid electric vehicle is studied.Based on the analysis of the existing hybrid electric vehicle and its energy allocation strategy,firstly,based on the theoretical modeling method and the experimental modeling method,establish the forward simulation model of the vehicle.The engine model,motor model and power battery model were found.At the same time,the driver model and vehicle longitudinal dynamics model are established.Secondly,choose the optimal interval control method,with the vehicle fuel economy and battery balanced,established strategy with based on the rules of logic threshold energy distribution.Finally,the prediction model of the basic principle is a frame.As the optimization goal,fuel consumption,battery balance,and the actual motor angular velocity and forecast its angular velocity error are minimum,a instantaneous optimization and global optimization is established combining the energy distribution strategy by combined with exponential function prediction theory and dynamic programming optimization algorithm.Based on the MATLAB/Simulink and the model of parallel hybrid electric vehicle,comparing and simulating analysis the two energy distribution strategies,The effectiveness of the energy allocation strategy is verified.