Journal
APPLIED THERMAL ENGINEERING
Volume 125, Issue -, Pages 1501-1517Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2017.07.126
Keywords
Lithium-ion battery; Irreversible and reversible heat; Nominal capacity; Electrode materials; Charge/discharge rate
Funding
- University of Akron
- State of Ohio's
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Heat generation in lithium-ion batteries (LIBs), different in nominal battery capacity and electrode materials (battery chemistry), is studied at various charge and discharge rates through the multiphysics modeling and computer simulation. The model is validated using experimental results obtained in lab and the results reported by other researchers in literature. All sources of heat generation - including reversible heat generation and irreversible heat generation due to activation, concentration, and ohmic (electronic and ionic) polarizations - in LIBs with graphite/LiFePO4, graphite/LiMn2O4, and graphite/LiCoO2 electrode materials are quantified and the effects of the battery nominal capacity at various charge and discharge rates are studied. This study determines which sources of heat generation are significant and which sources of heat generation are negligible at different LIBs design and operating conditions. The contribution of LIB's different components including cathode, anode, separator, and current collectors in heat generation in LIBs is also determined. The results of this study assists battery engineers and researchers to characterize the thermal behavior of LIBs and have a much more exact prediction over the battery heat generation, leading to designing effective thermal management systems and providing accurate battery management systems for different applications of LIBs as well as cell design optimization and operation. (C) 2017 Elsevier Ltd. All rights reserved.
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