Computational model of 18650 lithium-ion battery with coupled strain rate and SOC dependencies
By Jun Xu, Binghe Liu, Xinyi Wang, Dayong Hu. 2016
246 citations recorded by the source corpus.
Highly nonlinear structures and constituent materials and hazardous experiment situations have resulted in a pressing need for a numerical mechanical model for lithium-ion battery (LIB). However, such a model is still not well established. In this paper, an anisotropic homogeneous model describing the jellyroll and the battery shell is established and validated through compression, indentation, and bending tests at quasi-static loadings. In this model, state-of-charge (SOC) dependency of the LIB is further included through an analogy with the strain-rate effect. Moreover, with consideration of the inertia and strain-rate effects, the anisotropic homogeneous model is extended into the dynamic regime and proven capable of predicting the dynamic response of the LIB using the drop-weight test. The established model may help to predict extreme cases with high SOCs and crashing speeds with an over 135% improved accuracy compared to traditional models. The established coupled strain rate and SOC dependencies of the numerical mechanical model for the LIB aims to provide a solid step toward unraveling and quantifying the complicated problems for research on LIB mechanical integrity.
Subfields: Automotive Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/b0ed62feb07c9ca9b21ad2ae15976c418469a4f9
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In Automotive Engineering
In Electrical and Electronic Engineering
Citations in the corpus
- Constitutive behavior and progressive mechanical failure of electrodes in lithium-ion batteries (2017, unknown): “Xu et al. [13,14] further improved the models taking into consideration strain-rate effects and incorporating a mechanical integrity criterion, and simulated the dynamic mechanical behavior of lithium-ion batteries.”
- Integrated computation model of lithium-ion battery subject to nail penetration (2016, methodology): “The hardening law for the jellyroll was discussed in our previous study [19].”