Development of Supercapacitor-Aided Hybrid Energy Storage System to Enhance Battery Life Cycle of Electric Vehicles

Min-Fu Hsieh, Po-Hsun Chen, Fu-Sheng Pai and Rui-Yang Weng
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Min-Fu Hsieh: Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
Po-Hsun Chen: Department of Applied Science, R.O.C. Naval Academy, Kaohsiung 81345, Taiwan
Fu-Sheng Pai: Department of Electrical Engineering, National University of Tainan, Tainan 70005, Taiwan
Rui-Yang Weng: Department of Electrical Engineering, National Cheng Kung University, Tainan 70101, Taiwan

Sustainability, 2021, vol. 13, issue 14, 1-13

Abstract: This paper presents a C-rate control method for a battery/supercapacitor (SC) hybrid energy storage system (HESS) to enhance the life cycle of the battery in electric vehicles (EVs). The proposed HESS provides satisfactory power for dynamic movements of EVs (e.g., acceleration or braking) while keeping the battery current within a secure level to prevent it from degradation. The configurations of conventional HESSs are often complex due to the two energy storages and their current/voltage sensing involved. Therefore, in this paper, a simple current-sensing scheme is utilized and the battery is directly treated as a controlled variable to help the battery output current remain stable for different load conditions. While the proposed circuit requires only one current feedback signal, neither the SC nor load current sensors are needed, and the circuit design is thus significantly simplified. Both simulation and experimental results validated the effectiveness of the proposed HESS operating in conjunction with the motor drive system. The proposed method aims at fully utilizing recycled energy and prolonging battery lifespan.

Keywords: hybrid energy storage system (HESS); C-rate control; electric vehicles (EVs); supercapacitor (SC); battery lifetime (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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