Abstract: As for the electric vehicle, the design of its braking system must be adapted to the requirements of energy recovery. Based on the research toward brake-by-wire system products on the market, a kind of new electronic brake booster is designed in this article. Then, a control system of braking energy recovery for electric vehicles is constructed, which includes the electronic brake booster, vehicle controller, battery management system, motor controller, antilock brake system (ABS) or electronic stability controller (ESC). A control strategy model of braking energy recovery is built in Matlab/Simulink software, with the target braking force, battery state of charge (SOC), vehicle speed, and motor parameters taken as input variables, and the target hydraulic braking force and target motor braking force taken as output variables. Furthermore, the control strategy is evaluated by simulation of Matlab/Simulink and AVL Cruise, and a good energy recovery performance is exhibited on the electric vehicle with the control strategy. Under the new european driving cycle (NEDC) working condition, the energy recovery rate reaches 12.8% and the driving range is increased by 15%. Through the study of this paper, a meaningful guidance can be provided for the development of brake-by-wire system and energy recovery control system of electric vehicles.

Key words: Electric vehicle; Braking energy recovery; Brake-by-wire; Control strategy

摘要： 作为新能源汽车的核心功能，能量回收对汽车的制动系统提出了新的要求。基于对同 行线控制动系统产品的分析，文章设计了一款新型电子制动助力器，并从整车层面构建了电 动汽车的制动能量回收控制系统，该系统包括电子制动助力器、整车控制器、电池管理器、 电机控制器、防抱死制动系统（ABS）和电子稳定性控制系统（ESC）。利用 Matlab/Simulink 软件，以整车目标制动力、电池荷电状态（SOC）、车速和驱动电机状态参数为输入变量，以 目标液压制动力和目标电机制动力为输出变量，搭建了制动能量回收控制策略模型，并将其 嵌入 AVL Cruise 整车模型，进行联合仿真分析。仿真结果表明，控制策略具有良好的制动能 量回收效果，新欧洲驾驶循环（NEDC）工况下的能量回收率达到 12.8%，续驶里程贡献度达 到 15%。文章的研究可以为电动汽车的线控制动系统产品及其能量回收控制系统的开发提供 参考。

关键词: 电动汽车；制动能量回收；线控制动；控制策略