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Automotive Engineering ›› 2021, Vol. 43 ›› Issue (2): 171-180.doi: 10.19562/j.chinasae.qcgc.2021.02.003

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Research on Optimization of Power Consumption of Pure Electric Vehicle Based on Energy Flow Analysis

Wei Huang1,2,Guilian Zhang2,Denghui Zhou1,Lin Hu1()   

  1. 1.School of Automotive and Mechanical Engineering,Changsha University of Science and Technology,Changsha 410114
    2.Hunan Leopaard Motors Co. ,Ltd. ,Changsha 410100
  • Received:2020-06-17 Revised:2020-09-06 Online:2021-02-25 Published:2021-03-04
  • Contact: Lin Hu E-mail:hulin888@sohu.com

Abstract:

Research on energy flow analysis is an effective way to understand vehicle energy utilization and optimize vehicle economy. For the problem of excessive power consumption of a pure electric vehicle, a pure electric vehicle energy flow test scheme is designed, and the performance benchmarking test analysis of main components is completed. Through theoretical analysis, the mathematical model affecting power consumption and the method of selecting optimal parameters based on value factor are established. Based on CRUISE power consumption simulation analysis model, quantitative power consumption optimization analysis is carried out from the aspects of electric drive system efficiency improvement, rolling resistance optimization, braking energy recovery rate improvement and accessory control strategy optimization. The improved real vehicle test results show that the energy flow efficiency of the whole vehicle has been improved significantly, with the DC/DC charging efficiency increased to 90%, the braking energy recovery rate increased to more than 18% and the vehicle power consumption reduced by 13.78% under NEDC conditions, which further improves the energy utilization economy of pure electric vehicles.

Key words: energy flow test, power consumption, pure electric vehicle, drive cycle