The electrochemical performance of lithium-ion batteries is highly temperature dependent. An accurate determination of battery thermal parameters is crucial for research including cell thermal analysis, safety design, and multiphysics simulations. This work explores the possibility to use a lumped capacitance model based experimental approach to measure the battery convective heat transfer coefficient and specific heat capacity. In this approach, the transient temperature of the battery and its can (by removing the jellyroll) is measured with an infrared radiation camera. When the Biot number of the battery Bi $\ll 1$, the lumped capacitance model can be used to determine cell specific heat capacity through the measured battery surface temperature, where the convective heat transfer coefficients of both the can and the battery are the same and the specific heat capacity of the can is known. As an example, the specific heat capacity of LG G5 smartphone batteries is measured to demonstrate the proposed approach. The specimens are tested under both natural and forced convection conditions. The measured cell specific heat capacity is very consistent between these two convection conditions.

锂离子电池的电化学性能高度依赖于温度。电池热参数的准确确定对于包括电池热分析，安全设计和多物理场仿真在内的研究至关重要。这项工作探索了使用基于集总电容模型的实验方法来测量电池对流传热系数和比热容的可能性。在这种方法中，电池和其罐的瞬态温度（通过取出果冻卷）是用红外热像仪测量的。当电池的比奥数为Bi$\ll \mathrm{1个}$，集总电容模型可用于通过测量的电池表面温度确定电池的比热容量，其中罐和电池的对流传热系数相同，并且罐的比热容量已知。例如，对LG G5智能手机电池的比热容进行了测量，以证明所提出的方法。在自然和强制对流条件下对样品进行测试。在这两个对流条件之间，测得的电池比热容量非常一致。