Abstract
A thermal simulation model is developed to analyze the thermal behavior of the lithium‐ion battery. This model precisely considers the thermal properties of battery materials, including cathode, anode, and electrolyte. The LiNi0.5Mn1.5O4 (LNMO)/Li4Ti5O12 (LTO) battery is modeled for the first time, and the accuracy is verified by an experimental battery test. The results demonstrate that the thermal runaway of the battery is mainly caused by the decomposition of LNMO. Little heat absorbed by the gasification of electrolyte solvent and highly thermal stable LTO account for a relatively small proportion of the factors leading to the battery temperature rise. The similar results of simulation and accelerating rate calorimeter (ARC) testing under the adiabatic condition indicate that the thermal simulation model utilized in this work is a good guidance for safety design of the LNMO/LTO battery.
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