关键词: 插电式混合动力客车；能量管理；模型预测控制；电池寿命

Abstract: Based on the battery life model, this paper aims to establish an energy management strategy considering the cost of battery aging for plug-in hybrid electric buses to further improve the economic performance of vehicles. Firstly, the backward simulation model of the power system of the plug-in hybrid electric bus is constructed, and then the semi-empirical model of battery life based on the experimental data to calculate the attenuation of battery capacity is constructed. Secondly, the objective function of energy consumption cost and battery aging cost is established, and the energy management strategy considering battery life is developed based on the framework of model predictive control at last. The simulation results show that this strategy can delay the aging rate of the battery and reduce the aging cost of the battery by optimizing the output power of the battery and the number of turning on of the electronic control unit. Compared with the energy management strategy without considering the aging of the battery, its economy is improved by about 1.51%, which has certain practical significance.

Key words: Plug-in hybrid electric bus; Energy management; Model predictive control; Battery life