期刊
JOURNAL OF POWER SOURCES
卷 318, 期 -, 页码 200-209出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.04.001
关键词
Adiabatic calorimetry; States of charge; Thermal explosion energy; Chemical kinetics; Pseudo-zero-order reaction
资金
- Ministry of Science and Technology, Taiwan, ROC [MOST 104-2221-E-039-005-MY2]
Use of adiabatic calorimetry to characterise thermal runaway of Li-ion cells is a crucial technique in battery safety testing. Various states of charge (SoC) of Li-ion cells were investigated to ascertain their thermal runaway features using a Vent Sizing Package 2 (VSP2) adiabatic calorimeter. To evaluate the thermal runaway characteristics, the temperature-pressure-time trajectories of commercial cylindrical cells were tested, and it was found that cells at a SoC of greater than 50% were subject to thermal explosion at elevated temperatures. Calorimetry data from various 18650 Li-ion cells with different SoC were used to calculate the thermal explosion energies and chemical kinetics; furthermore, a novel self heating model based on a pseudo-zero-order reaction that follows the Arrhenius equation was found to be applicable for studying the exothermic reaction of a charged cell. (C) 2016 Elsevier B.V. All rights reserved.
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