The ability to correctly predict the behavior of lithium ion batteries is critical for safety, performance, cost and lifetime. Particularly important for this purpose is the prediction of the internal temperature of cells, because of the positive feedback between heat generation and current distribution. In this work, a comprehensive electro-thermal model is developed for a cylindrical lithium-ion cell. The model is comprehensively parameterized and validated with experimental data for 2170 cylindrical cells (LG M50T, NMC811), including direct core temperature measurements. The validated model is used to study different cell designs and cooling approaches and their effects on the internal temperature of the cell. Increasing the number of tabs connecting the jellyroll to the base of the cylindrical-can reduces the internal thermal gradient by up to 25.41%. On its own, side cooling is more effective than base cooling at removing heat, yet both result in thermal gradients within the cell of a similar magnitude, irrespective of the number of cell tabs. The results are of immediate interest to both cell manufacturers and battery pack designers, while the modelling and parameterization framework created is an essential tool for energy storage system design.

正确预测锂离子电池性能的能力对于安全性，性能，成本和使用寿命至关重要。为此目的，特别重要的是预测电池内部温度，因为热量产生和电流分布之间存在正反馈。在这项工作中，为圆柱形锂离子电池开发了一个综合的电热模型。对该模型进行了全面的参数设置，并使用2170个圆柱形电池（LG M50T，NMC811）的实验数据进行了验证，包括直接核心温度测量。经过验证的模型用于研究不同的电池设计和冷却方法，以及它们对电池内部温度的影响。增加将果冻卷连接到圆柱罐底部的凸耳的数量，可将内部热梯度降低多达25.41％。就其本身而言，侧面冷却在去除热量方面比基础冷却更有效，但无论电池接头的数量如何，两者都会导致相似程度的电池内部热梯度。电池制造商和电池组设计人员都立即对结果感兴趣，而创建的建模和参数化框架是进行储能系统设计的重要工具。