Title: Research on the energy management of composite energy storage system in electric vehicles

Authors: Meilan Zhou; Zhanhua Liu; Jifeng Feng

Addresses: Department of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin, 150080, China ' Department of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin, 150080, China ' Department of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin, 150080, China

Abstract: To solve the problem of power allocation of battery and super capacitor in the composite energy storage system of electric vehicles, we propose the logic threshold and fuzzy control strategy to arrange battery and super capacitor to supply the average and peak power to the load, respectively. Based on the simulation software of electric vehicles, we perform simulation modelling to analyse the current of the battery, the SOC of battery and the current of the super capacitor. For verifying the feasibility of the control strategy, we set up an experimental platform to study pure electric vehicles during driving and braking. Simulation and experimental results indicate that the composite energy storage system can reduce the charging and discharging times and the current amplitude of the battery, and improve the utilisation ratio of regenerative braking energy and the mileage of electric vehicles.

Keywords: electric vehicles; composite energy storage; control strategy; test platform.

DOI: 10.1504/IJEHV.2018.093066

International Journal of Electric and Hybrid Vehicles, 2018 Vol.10 No.1, pp.41 - 56

Received: 01 Jul 2017
Accepted: 11 Aug 2017
Published online: 06 Jul 2018 *

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