Advanced hybrid energy storage system for mild hybrid electric vehicles |
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Authors: | D -H Shin B -H Lee J -B Jeong H -S Song H -J Kim |
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Institution: | (1) Georgia Institute of Technology, Charlotte, USA;(2) Department of ECE, University of North Carolina, Charlotte, USA |
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Abstract: | Hybrid electric vehicles (HEV) utilize electric power and a mechanical engine for propulsion; therefore, the performance of
HEVs is directly influenced by the characteristics of the energy storage system (ESS). The ESS for an HEV generally requires
high power performance, long cycle life, reliability and cost effectiveness; thus, a hybrid energy storage system (HESS) that
combines different types of storage devices has been considered to fulfill both performance and cost requirements. To improve
the operating efficiency and cycle life of a HESS, an advanced dynamic control regime in which pertinent storage devices in
the HESS can be selectively operated based on their status is presented. Verification tests were performed to confirm the
degree of improvement in energy efficiency. In this paper, an advanced HESS with a battery management system (BMS) that includes
an optimal switching control function based on the estimated state of charge (SOC) is presented and verified. |
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