With the extensive application of lithium batteries and the continuous improvements in battery management systems and other related technologies, the requirements for fast and accurate modeling of lithium batteries are gradually increasing. Temperature plays a vital role in the dynamics and transmission of electrochemical systems. The thermal effect must be considered in battery models. In this paper, a simulation model of a lithium battery with thermal characteristics is established. This thermal model is coupled with a temperature-dependent 2-RC equivalent circuit model to form an electro-thermal model for lithium-ion batteries. The hybrid pulse power characterization test is used to estimate the equivalent circuit parameters. Finally, under NEDC and DST conditions, battery voltage and temperature estimation results of the electro-thermal model are analyzed to verify the correctness and accuracy of the model. The voltage error is within − 0.16 ~ 0.20 V under the NEDC condition. Moreover, under the DST condition, the maximum relative error in the electro-thermal model is within 5%.

随着锂电池的广泛应用以及电池管理系统等相关技术的不断完善，对锂电池快速准确建模的要求逐渐提高。温度在电化学系统的动力学和传输中起着至关重要的作用。在电池模型中必须考虑热效应。本文建立了具有热特性的锂电池仿真模型。该热模型与温度相关的 2-RC 等效电路模型相结合，形成锂离子电池的电热模型。混合脉冲功率特性测试用于估计等效电路参数。最后，在NEDC和DST条件下，分析电热模型的电池电压和温度估计结果，验证模型的正确性和准确性。在 NEDC 条件下，电压误差在 − 0.16 ~ 0.20 V 范围内。而且，在夏令时条件下，电热模型的最大相对误差在5%以内。