Hybrid Energy Storage System with Vehicle Body Integrated Super-Capacitor and Li-Ion Battery: Model, Design and Implementation, for Distributed Energy Storage

Sekhar Raghu Raman, Ka-Wai (Eric) Cheng, Xiang-Dang Xue, Yat-Chi Fong and Simon Cheung
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Sekhar Raghu Raman: Power Electronics Research Center, Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China
Ka-Wai (Eric) Cheng: Power Electronics Research Center, Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China
Xiang-Dang Xue: Power Electronics Research Center, Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China
Yat-Chi Fong: Power Electronics Research Center, Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China
Simon Cheung: Power Electronics Research Center, Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China

Energies, 2021, vol. 14, issue 20, 1-22

Abstract: In this paper, a distributed energy storage design within an electric vehicle for smarter mobility applications is introduced. Idea of body integrated super-capacitor technology, design concept and its implementation is proposed in the paper. Individual super-capacitor cells are connected in series or parallel to form a string connection of super-capacitors with the associated management unit to form a panel. These super-capacitor panels are shaped to fit the alternative concept of vehicle design, and it solves the design issues and prepares for configurable electric vehicles. Body integration of super-capacitors enhances the acceleration, and regenerative braking performances of the electric vehicle increases the operating life of the Li-ion battery and improves space utilization by giving more area for the main energy source, the Li-ion battery. Integrating super-capacitor into the car body involves special packaging technology to minimize space and promotes distributed energy storage within a vehicle. This pioneering design encourages future configurable electric vehicles. Model of both the Li-ion battery and the super-capacitor employed is studied with its series internal resistance determined at various C-rates. Loss and the efficiency analysis of the bi-directional converter, traits of body integrated super-capacitors system and control of the interleaved bi-directional converter to regulate the power-sharing in the hybrid energy storage system is presented.

Keywords: hybrid energy storage; interleaved converter; Li-ion; super-capacitor; ultra-capacitor; distributed energy storage; configurable EV; electric vehicle (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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