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 LiNi_0.5Mn_1.5O₄ (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.

中文翻译：

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LiNi0.5Mn1.5O4 / Li4Ti5O12电池的热模拟研究

建立了一个热仿真模型来分析锂离子电池的热行为。该模型精确地考虑了电池材料的热特性，包括阴极，阳极和电解质。LiNi _0.5 Mn _1.5 O ₄（LNMO）/ Li ₄ Ti ₅ O ₁₂（LTO）电池是第一次建模，其准确性通过实验性电池测试得到验证。结果表明，电池的热失控主要是由LNMO的分解引起的。电解质溶剂的气化吸收的热量很少，并且热稳定性高的LTO占导致电池温度升高的因素的比例相对较小。绝热条件下的仿真和加速量热仪（ARC）测试的相似结果表明，这项工作中使用的热仿真模型为LNMO / LTO电池的安全设计提供了很好的指导。