A novel phenomenological multi-physics model of Li-ion battery cells

作者：Oh Ki Yong; Samad Nassim A; Kim Youngki; Siegel Jason B; Stefanopoulou Anna G; Epureanu Bogdan I^*

来源：Journal of Power Sources, 2016, 326: 447-458.

DOI：10.1016/j.jpowsour.2016.07.019

• Battery management system
• Li-ion battery
• Li-ion intercalation induced stress and strain
• Multi-physics model
• Thermal stress and strain

A novel phenomenological multi-physics model of Lithium-ion battery cells is developed for control and state estimation purposes. The model can capture electrical, thermal, and mechanical behaviors of battery cells under constrained conditions, e.g., battery pack conditions. Specifically, the proposed model predicts the core and surface temperatures and reaction force induced from the volume change of battery cells because of electrochemically- and thermally-induced swelling. Moreover, the model incorporates the influences of changes in preload and ambient temperature on the force considering severe environmental conditions electrified vehicles face. Intensive experimental validation demonstrates that the proposed multi-physics model accurately predicts the surface temperature and reaction force for a wide operational range of preload and ambient temperature. This high fidelity model can be useful for more accurate and robust state of charge estimation considering the complex dynamic behaviors of the battery cell. Furthermore, the inherent simplicity of the mechanical measurements offers distinct advantages to improve the existing power and thermal management strategies for battery management.

• 出版日期2016-9-15