Affiliations: [a] Department of Mechanical Engineering, University of Sistan and Baluchestan, Zahedan, Iran
| [b] Department of Electrical and Computer Engineering, University of Sistan and Baluchestan, Zahedan, Iran
Correspondence:
[*]
Corresponding author. S. Masoud Barakati, Department of Electrical and Computer Engineering, University of Sistan and Baluchestan, Zahedan, Iran. Tel.: +98 54 3113 2752; Fax: +98 54 33 44 7908; E-mail: [email protected].
Abstract: In electric vehicles, the battery is exposure to an excessive stress because of continuously charging and discharging. In this paper, a hybrid energy storage system (HESS) combined of supercapacitors (SC) and batteries is deployed. An energy management strategy based on fuzzy logic controller (FLC) and rule based controller (RBC) are proposed to mitigate the high stress problem and increase the battery lifetime. The battery and SC sizes are optimized based on a power demand profile. Based on simulation results, three different HESSs along with FLC and RBC are compared, in their SC voltages and battery currents viewpoints, and the best one is introduced. FLC has advantageous to alleviate battery current fluctuations in comparison with RBC, but RBC has higher battery lifetime.
Keywords: Hybrid energy storage system (HESS), fuzzy logic controller (FLC), electric vehicles, energy management strategy