In this paper, we present a detailed comparison study on the prediction accuracy by two different and simplified battery models, namely Lumped and Li-ion (1D electrochemical) model, for a prismatic 20Ah LiFePO₄ battery sandwiched between minichannel cold-plates with distributed flow. A two-way coupling between the battery model (Li-ion/Lumped) and 3D conjugate heat transfer model is considered for heat generation and dissipation rates at different discharge rates ($1-4\mathrm{C}$) and coolant inlet temperatures ($15-35°C$). The predicted battery voltage response at room temperature ($22°C$) and the performance of Battery Thermal Management System (BTMS) in terms of the battery surface temperatures (maximum temperature, $T_{\mathit{max}}$ and temperature difference, $\mathrm{\Delta }T$) are compared between the models. Further, to get the insights on the battery heating rate by these models, ten different locations are selected on the battery surface and temperature variation during the discharge process are compared. It is found that Lumped model predicted temperatures are in close agreement with that of Li-ion model with a difference of 2.1% at 1C discharge rate. However, the difference has increased to 16.4% at 4C discharge rate, and is attributed to the non-accountability of chemical reactions by the Lumped model in contrast to the Li-ion model (as a benchmark). Therefore, it is suggested to use Lumped model for preliminary studies on designing the BTMS because it requires only three measurable electrical parameters.

在本文中，我们通过两种不同的简化电池模型，即集总和锂离子（一维电化学）模型，对夹在具有分布式流的微型通道冷板之间的棱柱形 20Ah LiFePO ₄电池的预测精度进行了详细的比较研究。. 电池模型（锂离子/集总）和 3D 共轭传热模型之间的双向耦合被考虑用于不同放电率下的热生成和耗散率（$1——4\mathrm{C}$) 和冷却剂入口温度 ($15——35°C$）。室温下预测的电池电压响应（$22°C$) 和电池热管理系统 (BTMS) 在电池表面温度（最高温度、 ${吨}_{\mathit{最大限度}}$ 和温差， $\mathrm{\Delta }吨$) 在模型之间进行比较。此外，为了通过这些模型了解电池加热率，在电池表面选择了十个不同的位置，并比较了放电过程中的温度变化。发现集总模型预测的温度与锂离子模型的预测温度非常吻合，在 1C 放电率下相差 2.1%。然而，在 4C 放电率下，差异增加到 16.4%，这归因于与锂离子模型（作为基准）相比，集总模型对化学反应的不负责任。因此，建议使用集总模型进行设计 BTMS 的初步研究，因为它只需要三个可测量的电气参数。