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http://dx.doi.org/10.5229/JKES.2016.19.3.114

A CFD Modeling of Heat Generation and Charge-Discharge Behavior of a Li-ion Secondary Battery  

Kang, Hyeji (Department of Chemical Engineering, Kwangwoon University)
Park, Hongbeom (Department of Chemical Engineering, Kwangwoon University)
Han, Kyoungho (Department of Chemical Engineering, Kwangwoon University)
Yoon, Do Young (Department of Chemical Engineering, Kwangwoon University)
Publication Information
Journal of the Korean Electrochemical Society / v.19, no.3, 2016 , pp. 114-121 More about this Journal
Abstract
This study investigates a CFD modeling of the charge-discharge behavior due to heat generation during charge-discharge cycles of a Li-ion secondary battery(LIB). Present LIB system adopted a current-density equation, heat and mass transfer governing equations upon the 1-dimensional system to the thickness direction for the rectangular pouch configuration. According to the 3-kinds of the charge-discharge current densities of 1C($17.5A/m^2$), 3C($52.5A/m^2$) and 5C($87.5A/m^2$) subject to a 3 V of cut-off voltage, a constant-temperature system at 298 K and three different heat generating systems were analyzed with comparison. Battery capacity decreases with increment of charge-discharge densities not only at the constant-temperature system but also at the heat-generating system. The time for charge-discharge cycles increases at the heat-generating system compare to the constant-temperature system. These trends are considered that the increase of temperature due to heat generation causes the decrement of equilibrium potential of electrodes and the increment of diffusivity of Li ions. Furthermore, cooling effects were discussed in order to control the influence of heat generation due to charge-discharge behavior of a Li-ion secondary battery.
Keywords
Li-ion secondary battery; CFD modelling; charge-discharge; heat generation; current density;
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Times Cited By KSCI : 2  (Citation Analysis)
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