In order to improve the working performance of the lithium-ion battery in continuous charge-discharge process, in this study, the temperature field superposition method has been proposed to investigate the temperature response of the lithium-ion battery, which was based on the results of the thermal properties and the temperature dropping measurements, aiming to deeply analyze the thermal behavior of battery. The feasibility of the estimation of temperature field superposition method in temperature response of prismatic LiFePO₄ battery has been verified firstly by comparing on surface temperature with experiments. Furthermore, the battery with composite phase-change materials (CPCM) has also been selected to demonstrate the practicability of temperature field superposition method. It could be induced that the differences between numerical and experimental results were consistency, which were both below 2 °C under the condition of 1 C, 3 C or 5 C discharging rate. Therefore, it can be concluded that the temperature field superposition method could not only evaluate the surface temperature response of the battery but also predict the thermal behavior accurately, rapidly and simply, which would effectively improve the thermal safety performance of battery.

为了提高锂离子电池在连续充放电过程中的工作性能，本研究提出了基于温度场叠加法研究锂离子电池温度响应的方法。热性能和温降测量，旨在深入分析电池的热行为。棱柱形LiFePO ₄温度响应中温度场叠加法估计的可行性电池已通过表面温度与实验的比较首次得到验证。此外，还选择了具有复合相变材料（CPCM）的电池来证明温度场叠加方法的实用性。可以看出，在1 C、3 C或5 C放电率条件下，数值和实验结果之间的差异是一致的，均在2°C以下。因此，可以得出结论，温度场叠加法不仅可以评估电池的表面温度响应，而且可以准确、快速、简单地预测热行为，将有效提高电池的热安全性能。