摘要
为了进一步提升纯电动汽车的能量回收效率,提出一种电液复合制动能量管理策略。为解决低速时电机效率较小且存在转矩波动的问题,设置制动能量回收车速门限值为20 km/h。比较电机回收力矩最大值与法规规定的界限,取两者中最大为电机回收力矩。为了验证能量回收效果,搭建了SIMULINK逆向仿真模型,将该策略与无制动能量回收策略和理想制动能量回收策略在NYCC、CATC、FTP 3种循环工况下进行对比仿真,采用制动能量回收效率和整车有效能量回收效率2个指标来评价该策略制动能量回收的效果。仿真结果表明在NYCC循环工况下电液复合制动系统的整车有效制动能量回收效率平均提高了21.61%,动力电池SOC值提高了1.85%,增加了电池电量,提高了汽车的续驶里程。
To improve the braking energy recovery rate of electric vehicles,an energy recovery strategy is proposed for the electro-hydraulic composite braking system.The brake energy recovery vehicle speed threshold is set low to 20km/h to solve the problem of low motor efficiency and torque fluctuation at low speed.After comparing the maximum value of the motor recovery torque with the limits specified by the regulations,we find that the maximum of the two is the motor re⁃covery torque.In order to validate the performanceof the energy recovery strategy,the SIMULINK reverse simulation model was built.The strategy was compared with the no-braking energy recovery strategy and the ideal braking energy recovery strategy under the three cycle conditions of NYCC,CATC and FTP.The recovery efficiency and the effective en⁃ergy recovery efficiency of the vehicle are used to evaluate the performanceof the brake energy recovery of the strategy.The simulation results of NYCC cycle condition show that the effective braking energy recovery efficiency of the electro hydraulic composite brake system is increased by 21.61%on average,and the SOC value of the power battery is in⁃creased by 1.85%,which increases the battery power and driving mileage of the vehicle.
作者
陈勇
李聪聪
郭立书
魏长银
邱子桢
李光鑫
CHEN Yong;LI Congcong;GUO Lishu;WEI Changyin;QIU Zizhen;LI Guangxin(Tianjin Key Laboratory of Power Transmission and Safety Technology for New Energy Vehicles,Hebei University of Tech-nology,Tianjin 300130,China;Zhejiang Geely New Energy Commercial Vehicle Research Institute,Hangzhou,Zhejiang 310052,China)
出处
《河北工业大学学报》
CAS
2022年第1期7-14,20,共9页
Journal of Hebei University of Technology
基金
国家重点研发计划(2018YFB0106403)。
