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Int. J. Electroactive Mater. 9 (2021) 1-11

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Effect of Ambient Temperature, C-rate and SOH on the Charge and Discharge Performance and Self-temperature of LCO Batteries

Lucas Lima Pelais¹, Augusto Murakami Ricci², Jair Scarminio¹, Lucca Luz Belliboni¹, Paulo Rogério Catarini da Silva¹, Gabriel Gonzaga dos Santos^1
1Física, Universidade Estadual de Londrina, Londrina, PR, Brazil
²Physics, Universidade Estadual de Londrina, Londrina, Paraná, Brazil

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Abstract : The discharge capacity of LiCoO2 (LCO) batteries charged at one specific temperature and discharged at another one was analyzed in the 0 to 50 °C range for the low and high state of health (SOH) batteries. It was found a discharge capacity dependence on the relative charge-discharge temperatures. Battery surface self-temperature measured under different charging and discharging currents, in 0.2 C to 2 C C-rates, showed an almost constant surface self-temperature with the charging C-rates. However, a significant surface temperature rising, commensurate to the C-rates, was obtained in the battery discharges, upon a battery SOH dependence. A correlation between the battery surface self-temperature and LiCoO2 crystalline phases was also found.

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