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- W2021123990 abstract "This paper presents a 3D electro-thermal model approach for large-format lithium ion cells. The model development is focused on the prediction of 3D behavior of large-format lithium ion cells up to high discharge currents. The distribution and inhomogeneity of internal state values in the cell like temperature, current, power loss, SOC as well as voltage can be predicted reliably with this kind of models. The demand for calculating these state values on battery management systems can be met with a model order reduction introduced in this paper. Moreover, the interdependency of the temperature inhomogeneities and the inhomogeneities of inner state values in the cell can be studied. These dependencies have major influence on lifetime and performance of large-format lithium ion cells during common traction applications. The paper presents the configuration of a 3D equivalent circuit model considering full cell geometry and internal electrical resistances. In order to consider 3D thermal as well as 3D electrical effects, the direct coupling of the 3D electrical model with a 3D thermal FEM model is introduced. Furthermore, in this paper a convergence study on elementary cell resolution is performed. Additionally, the model is comprehensively validated with a thermal characterization over a wide range of temperature and current up to 300 A." @default.
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- W2021123990 date "2014-01-01" @default.
- W2021123990 modified "2023-09-25" @default.
- W2021123990 title "3D Electro-Thermal Model Approach for the Prediction of Internal State Values in Large-Format Lithium Ion Cells and Its Validation" @default.
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- W2021123990 doi "https://doi.org/10.1149/2.1201412jes" @default.
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