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

<p class="Abstract"><span lang="EN-MY">A combination of battery and ultracapacitor as a hybrid energy storage system (HESS) of an electric vehicle (EV) </span><span lang="EN-MY">can result in better acceleration performance, reduce battery charge-discharge cycle and longer driving range. This paper</span><span lang="EN-MY"> presents a </span><span lang="EN-MY">new converter design combining triple-half-bridge (THB) and buck-boost half-bridge (BHB) converters </span><span lang="EN-MY">in a battery-ultracapacitor HESS. The BHB converter is used to compensate the voltage variation of the ultracapacitor. </span><span lang="EN-MY">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 </span><span lang="EN-MY">∆</span><span lang="EN-MY">-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. </span></p>