Scale-Up of Physics-Based Models for Predicting Degradation of Large Lithium Ion Batteries

Sustainability

卷:12

Hong-Keun Kim¹  Kyu-Jin Lee² 

[1] Department of Mechanical & Aerospace Engineering, Seoul National University, Seoul 151-744, Korea;

[2] Department of Mechanical Engineering, Myongji University, Yongin 448-728, Korea;

关键词: large sized lithium-ion battery;    physics-based model;    life prediction;    scale-up model;    reduced order cell model;   

DOI  :  10.3390/su12208544

来源: DOAJ

【 摘 要 】

Large lithium-ion batteries (LIBs) demonstrate different performance and lifetime compared to small LIB cells, owing to the size effects generated by the electrical configuration and property imbalance. However, the calculation time for performing life predictions with three-dimensional (3D) cell models is undesirably long. In this paper, a lumped cell model with equivalent resistances (LER cell model) is proposed as a reduced order model of the 3D cell model, which enables accurate and fast life predictions of large LIBs. The developed LER cell model is validated via the comparisons with results of the 3D cell models by simulating a 20Ah commercial pouch cell (NCM/graphite) and the experimental values. In addition, the LER cell models are applied to different cell types and sizes, such as a 20Ah cylindrical cell and a 60Ah pouch cell.

【 授权许可】

Unknown