Journal
ENERGY
Volume 70, Issue -, Pages 529-538Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2014.04.046
Keywords
Lithium-ion battery; Phase change material; Expanded graphite; Temperature distribution; Cooling duct; Hybrid/electric vehicle
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In this study, a novel Li-ion battery pack design including hybrid active passive thermal management system is presented. The battery pack is suitable for using in hybrid/electric vehicles. Active part of the hybrid thermal management system uses distributed thin ducts, air flow and natural convection as cooling media while the passive part utilizes phase change material/expanded graphite composite (PCM/EG) as cooling/heating component to optimize the thermal performance of the proposed battery pack. High melting enthalpy of PCM/EG composite together with melting of PCM/EG composite at the temperature of 58.9 degrees C remains the temperature distribution of the battery units in the desired temperature range (below 60 degrees C). The temperature and voltage distributions in the proposed battery pack design consisting of battery units, distributed thin ducts and PCM/EG composite are calculated by numerical solving of the related partial differential equations. Simulation results obtained by writing M-files code in Matlab environment and plotting the numerical data are presented to validate the theoretical results. A comparison between the thermal and physical characteristics of the proposed battery pack and other latest works is presented that explicitly proves the battery pack performance. (C) 2014 Elsevier Ltd. All rights reserved.
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