Composite Braking Control Strategy for Electromechanical-Hydraulic Vehicles  

作　　者：Zewen Meng Jichao Hong Hongxin Zhang Tiezhu Zhang Xiaoming Xu Qinghai Zhao Jian Yang 

机构地区：[1]College of Mechanical and Electrical Engineering,Qingdao University,Qingdao 260071,China [2]Power Integration and Energy Storage Systems Engineering Technology Center(Qingdao),Qingdao 260071,China [3]School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China [4]Shunde Graduate School of University of Science and Technology Beijing,Foshan 528000,China

出　　处：《CSEE Journal of Power and Energy Systems》2024年第4期1722-1732,共11页中国电机工程学会电力与能源系统学报（英文）

基　　金：funded by the National Natural Science Foundation of China(52075278);Municipal Livelihood Science and Technology Project of Qingdao(19-6-1-92-nsh).

摘　　要：Short driving ranges and low braking energy recovery efficiencies are two recognized technical bottlenecks to be overcome in electric vehicles. In this paper, a novel electromechanical-hydraulic coupling system is proposed and integrated as a powertrain for electric vehicles, which can assist the electric vehicle to fully utilize its braking energy. The hydraulic regenerative braking force and electric regenerative braking force can provide all the braking needs using the medium and small braking intensities. Furthermore, an improved compound brake control strategy based on the braking force distribution is proposed and simulated. The results show that under the premise of ensuring braking stability, the electromechanical-hydraulic coupling driving electric vehicle can adapt to various working conditions with excellent energy-saving results. The hydraulic accumulator recovery efficiency is above 99%, and the state of charge consumption rate of the battery pack can be reduced by more than 9%. More importantly, the proposed hybrid power system can significantly improve the driving range and energy efficiency, as well as reduce the consumers' mileage anxiety in electric vehicles.

关 键 词：Braking control strategy electric vehicle electromechanical-hydraulic coupling energy recovery state of charge 

分 类 号：TM73[电气工程—电力系统及自动化]