Capacity Sizing of Embedded Control Battery–Supercapacitor Hybrid Energy Storage System
Noah Lee, Chen Hon Nee, Seong Shan Yap, Kwong Keong Tham, Ah Heng You, S. L. Yap, Abdul Kariem Bin Mohd Arof
Abstract
A battery–supercapacitor hybrid energy storage system is investigated as a solution to reduce the high-power delivery stress on the battery. An optimally-sized system can further enhance the storage and cost efficiency. This paper discusses several possible problems in the sizing of a battery–supercapacitor hybrid energy storage system for practical applications. A sizing method that utilises data collected from a fully active embedded control hybrid energy system is proposed. The feasibility of the method is then tested on three load profiles that represent the load demand of inter- and intra-applications with a battery–supercapacitor hybrid energy storage system. The result is compared to a battery-only single energy storage system. The results verified that the number of batteries required in the hybrid energy storage system is reduced by at least 50% compared to the battery-only single energy storage system.