电动汽车制动能量回收技术研究

Research on electric vehicle braking energy recovery technology

文章研究锂离子动力电池为储能系统且采用协调式制动策略的纯电动汽车,从制动工况上看,纯电动汽车可看成是电能回收和机械制动器的混合动力汽车。文章首先研究该类汽车的能量流,再研究制动策略的力矩分配及其受限因素,最后确定各因素与能量回收利用率的定量关系及其经验公式。

In this paper,pure electric vehicle with Li-ion battery as energy storage system and coordinated braking strategy is studied.From the braking condition,pure electric vehicle can be regarded as hybrid electric vehicle with electric energy recovery and mechanical brake.Firstly,this paper studies the energy flow of this kind of vehicle,then studies the moment distribution of braking strategy and its constraints,and finally determines the quantitative relationship between each factor and energy recovery efficiency and its empirical formula.