纯电动汽车制动能量回收策略研究

Research on Braking Energy Recovery Strategy for Pure Electric Vehicles

为了提高纯电动汽车的制动能量回收效率,本文对汽车制动动力学,制动能量回收的基本结构和原理进行了分析,提出了一种纯电动汽车制动能量回收控制策略,该策略综合考虑了影响纯电动汽车制动能量回收的因素,包括前,后轴制动力分配,ECE法规,车速,电机扭矩,电池SOC值等。然后分别利用AVL-Cruise,MATLAB/Simulink搭建了控制策略模型和整车模型,并进行了联合仿真。仿真结果显示,在该策略运行NEDC工况下,制动能量回收率达到了10.8%,因此,该策略能够有效提升制动能量回收效率,增加纯电动汽车的续驶里程。In order to provide the braking energy recovery efficiency of pure electric vehicles, this paper analyzes the basic structure and principle of automobile braking dynamics and braking energy recovery, and proposes a brake energy recovery control strategy for pure electric vehicles, which comprehensively considers the factors affecting the braking energy recovery of pure electric vehicles, including front and rear axle braking force distribution, ECE regulations, speed, motor torque, battery SOC value, etc. The simulation results show that the braking energy recovery rate reaches 10.8% under the NEDC working condition of the strategy, so the strategy can effectively improve the braking energy recovery efficiency and increase the driving range of pure electric vehicles.