A Simulation Framework for Battery Cell Impact Safety Modeling Using LS-DYNA
- Ford Motor Company, Dearborn, MI (United States)
- Livermore Software Technology Corporation, Livermore, CA (United States)
The development process of electrified vehicles can benefit significantly from computer-aided engineering tools that predict the multiphysics response of batteries during abusive events. A coupled structural, electrical, electrochemical, and thermal model framework has been developed within the commercially available LS-DYNA software. The finite element model leverages a three-dimensional mesh structure that fully resolves the unit cell components. The mechanical solver predicts the distributed stress and strain response with failure thresholds leading to the onset of an internal short circuit. In this implementation, an arbitrary compressive strain criterion is applied locally to each unit cell. A spatially distributed equivalent circuit model provides an empirical representation of the electrochemical response with minimal computational complexity. The thermal model provides state information to index the electrical model parameters, while simultaneously accepting irreversible and reversible sources of heat generation. The spatially distributed models of the electrical and thermal dynamics allow for the localization of current density and corresponding temperature response. The ability to predict the distributed thermal response of the cell as its stored energy is completely discharged through the short circuit enables an engineering safety assessment. A parametric analysis of an exemplary model is used to demonstrate the simulation capabilities.
- Research Organization:
- Ford Motor Company, Detroit, MI (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- EE0007288
- OSTI ID:
- 1425410
- Alternate ID(s):
- OSTI ID: 1430829
- Journal Information:
- Journal of the Electrochemical Society, Vol. 164, Issue 1; ISSN 0013-4651
- Publisher:
- The Electrochemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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