Design of a Battery-Ultracapacitor Hybrid Energy Storage System with Power Flow Control for an Electric Vehicle

• Published in: International Journal of Power Electronics and Drive Systems Vol. 9; no. 1; p. 286
• Main Authors: Tan, Boon Kai, Tan, Nadia M. L., Ramasamy, Agileswari
• Format: Journal Article
• Language: English
• Published: Yogyakarta IAES Institute of Advanced Engineering and Science 01.03.2018
• Subjects: Acceleration; Batteries; Battery cycles; Control systems; Converters; Dynamic response; Electric bridges; Electric vehicles; Energy storage; Equivalent circuits; Flow control; Hybrid systems; Power flow; Power management
• DOI: 10.11591/ijpeds.v9.i1.pp286-296
• ISSN: 2088-8694

A combination of battery and ultracapacitor as a hybrid energy storage system (HESS) of an electric vehicle (EV) can result in better acceleration performance, reduce battery charge-discharge cycle and longer driving range. This paper presents a new converter design combining triple-half-bridge (THB) and buck-boost half-bridge (BHB) converters in a battery-ultracapacitor HESS. The BHB converter is used to compensate the voltage variation of the ultracapacitor. A power management system is proposed to control the power of battery and ultracapacitor to supply the demanded power. This paper describes the operation of the proposed converter using a simplified ∆ -type primary-referred equivalent circuit. This paper also shows the simulation results verifying the dynamic response of the proposed power management system for the proposed HESS.