Research and analysis on brake energy recovery of pure electric vehicles

¹ Department of Mechanical Engineering, Suzhou University of Science and Technology. Suzhou, Jiangsu Province, 215009, China
² Department of Mechanical Engineering, Nanjing University of Science and Technology. Nanjing, Jiangsu Province, 210094, China
³ Department of Energy and Power, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu Province, 211111, China

^* Corresponding author: ywzhu@nuaa.edu.cn

Abstract

Environmental pollution and other problems are becoming increasingly serious with the energy crisis. Pure electric vehicles, as a new green and pollution-free means of transportation, are increasingly favoured by the public. Compared with traditional fuel vehicles, pure electric vehicles have a shorter range, and brake energy loss accounts for approximately 10-30% of the total energy consumption. Brake energy recovery technology can effectively improve the energy utilization rate of pure electric vehicles and increase their range. This article focuses on studying different methods of braking energy recovery for electric vehicles, using comparative analysis and selecting several sets of schemes with higher recovery efficiency for analysis, pointing out the advantages and disadvantages of different methods. Research indicates that electrochemical energy storage represents a superior approach for recycling energy due to its ability to enhance energy recovery efficiency through algorithmic optimization of motor braking force distribution. However, the application of mechanical energy storage and hydraulic energy storage in pure electric vehicles necessitates further improvements to address various technical challenges.