Thermal Analysis of a Fast Charging Technique for a High Power Lithium-Ion Cell
AbstractThe cell case temperature versus time profiles of a multistage fast charging technique (4C-1C-constant voltage (CV))/fast discharge (4C) in a 2.3 Ah cylindrical lithium-ion cell are analyzed using a thermal model. Heat generation is dominated by the irreversible component associated with cell overpotential, although evidence of the reversible component is also observed, associated with the heat related to entropy from the electrode reactions. The final charging stages (i.e., 1C-CV) significantly reduce heat generation and cell temperature during charge, resulting in a thermally safe charging protocol. Cell heat capacity was determined from cell-specific heats and the cell materials’ thickness. The model adjustment of the experimental data during the 2 min resting period between discharge and charge allowed us to calculate both the time constant of the relaxation process and the cell thermal resistance. The obtained values of these thermal parameters used in the proposed model are almost equal to those found in the literature for the same cell model, which suggests that the proposed model is suitable for its implementation in thermal management systems. View Full-Text
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García Fernández, V.M.; Blanco Viejo, C.; Anseán González, D.; González Vega, M.; Fernández Pulido, Y.; Alvarez Antón, J.C. Thermal Analysis of a Fast Charging Technique for a High Power Lithium-Ion Cell. Batteries 2016, 2, 32.
García Fernández VM, Blanco Viejo C, Anseán González D, González Vega M, Fernández Pulido Y, Alvarez Antón JC. Thermal Analysis of a Fast Charging Technique for a High Power Lithium-Ion Cell. Batteries. 2016; 2(4):32.Chicago/Turabian Style
García Fernández, Victor M.; Blanco Viejo, Cecilio; Anseán González, David; González Vega, Manuela; Fernández Pulido, Yoana; Alvarez Antón, Juan C. 2016. "Thermal Analysis of a Fast Charging Technique for a High Power Lithium-Ion Cell." Batteries 2, no. 4: 32.
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