The heat generated by a lithium-ion battery (LIB) under fast charging conditions can influence the charging efficiency, lifetime, and security of the battery. Considering the Joule heat generation of the tabs during the fast charging process, the electrochemical–thermal coupling model of a ternary LIB is built. The voltage and temperature of the battery are calculated during the constant current charging processes of 1 C, 3 C, and 6 C. By comparing the calculation results with the experiment results, the effectiveness of the model is verified. The electrochemical performance and thermal performance of the battery under fast charging conditions are obtained and analyzed through the model. The effects of the structure parameters such as the positive electrode thickness, N/P ratio, separator thickness, tab size, and arrangement on the average volume heat generation rate and temperature rise of the battery are investigated at charging rates of 3 C and 6 C. The conclusions obtained can provide references for the battery structure design and battery thermal management system design oriented to fast charging applications.

中文翻译：

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快速充电条件下结构参数对三元锂离子电池热性能的影响

锂离子电池（LIB）在快速充电条件下产生的热量会影响电池的充电效率，寿命和安全性。考虑到快速充电过程中凸耳的焦耳热产生，建立了三元LIB的电化学-热耦合模型。在1 C，3 C和6 C的恒定电流充电过程中计算出电池的电压和温度。通过将计算结果与实验结果进行比较，验证了模型的有效性。通过该模型获得并分析了快速充电条件下电池的电化学性能和热性能。结构参数的影响，例如正极厚度，N / P比，隔板厚度，接片尺寸，