Mechanical behavior of representative volume elements of lithium-ion battery cells under compressive loading conditions

Lai, Wei‐Jen; Ali, Mohamad Akbar; Pan, Jwo

doi:10.1016/j.jpowsour.2013.06.134

Cited by 157 publications

(99 citation statements)

References 4 publications

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“…In case of the out-of-plane compression, cell RVE specimens showed a lower stress response as compared to in-plane compression test suggesting that the RVE specimens are anisotropic, which confirmed findings of Sahraei et al [9] This softer response was mainly due to the gaps between the components and the porous nature of the separator and electrodes. The stress increased sharply with densification of the cell components until nominal strain of about 0.4 after which the cell RVE exhibited a linear elastic response [54].…”

Section: Pouched Cellsmentioning

confidence: 99%

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Review: Characterization and Modeling of the Mechanical Properties of Lithium-Ion Batteries

Kermani

Sahraei

2017

Energies

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Li-ion batteries have become a dominant power source in consumer electronics and vehicular applications. The mobile use of batteries subjects them to various mechanical loads. The mechanisms that follow a mechanical deformation and lead to damage and failure in Li-ion batteries have only been studied in recent years. This paper is a comprehensive review of advancements in experimental and computational techniques for characterization of Li-ion batteries under mechanical abuse loading scenarios. A number of recent studies have used experimental methods to characterize deformation and failure of batteries and their components under various tensile and compressive loading conditions. Several authors have used the test data to propose material laws and develop finite element (FE) models. Then the models have been validated against tests at different levels from comparison of shapes to predicting failure and onset of short circuit. In the current review main aspects of each study have been discussed and their approach in mechanical testing, material characterization, FE modeling, and validation is analyzed. The main focus of this review is on mechanical properties at the level of a single battery.

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Section: Pouched Cellsmentioning

confidence: 99%

“…In 2014, Lai et al characterized the mechanical response of dry in-house made Li-ion phosphate (LiFePO 4 /graphite) battery cells [54]. They conducted quasi-static out-of-plane and constrained in-plane compression tests on cell Representative Volume Element (RVE) specimens, as done by Sahraei et al [9], see Figure 3a,e.…”

Section: Pouched Cellsmentioning

confidence: 99%

Review: Characterization and Modeling of the Mechanical Properties of Lithium-Ion Batteries

Kermani

Sahraei

2017

Energies

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“…Constitutive models to predict the radial direction properties of jellyroll from the flow rule and the conception of volumetric strain were proposed by Greve and Fehrenbach [13] and Wierzbicki and Sahraei [15] respectively. Then the representative volume element model of the jellyroll was identified [16,17]. The anisotropic property of the structure as a result of geometry and material was not considered by these two models.…”

Section: Introductionmentioning

confidence: 99%

“…Ruling out the structural effects makes obtaining the material parameters of cathode and anode by tension and compression tests through staking up layers of the material rather straightforward [16,17]. The separator plays an important role in possible internal short-circuit and long-term electrochemical degradation [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Computational model of 18650 lithium-ion battery with coupled strain rate and SOC dependencies

et al. 2016

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h i g h l i g h t sAn anisotropic model to describe mechanical behaviors of LIB is established. SOC dependency is included in the mechanical model of the jellyroll. Dynamic effect is considered in the model for LIB. g r a p h i c a l a b s t r a c t a r t i c l e i n f o b s t r a c tHighly 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 strainrate 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.

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“…Cylindrical cells have been subjected to uniform radial compression, localized indentation, and bending loads. [1][2][3] Pouch cells have also been subjected to uniform and localized compression loads, [4][5][6][7][8] as well as combined torsion and compression loads 7,9,10 and nail penetration. 11 Many of these references propose mechanical models that achieve reliable agreement between the simulated and measured indenter force and displacement.…”

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confidence: 99%

A Simulation Framework for Battery Cell Impact Safety Modeling Using LS-DYNA

Marcicki

Zhu

Bartlett

et al. 2017

J. Electrochem. Soc.

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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. Increased utilization of lithium-ion (Li-ion) batteries for a variety of applications is driving the need for advanced simulation tools that can predict the combined structural, electrical, electrochemical, and thermal response to abuse conditions. If such simulation tools are integrated into the product development process, the resultant data have the potential to create highly optimized designs and achieve virtual verification of those designs.In support of automotive durability and crash safety requirements, several experimental and modeling studies have reported analysis of battery mechanical properties and onset of short circuits for various loading conditions. Cylindrical cells have been subjected to uniform radial compression, localized indentation, and bending loads. [1][2][3] Pouch cells have also been subjected to uniform and localized compression loads, 4-8 as well as combined torsion and compression loads 7,9,10 and nail penetration. 11 Many of these references propose mechanical models that achieve reliable agreement between the simulated and measured indenter force and displacement. However, they employ homogenized models for the cell jelly roll aimed at a binary determination of whether a short circuit occurs, and they do not attempt to simulate the multi-physics consequences following the onset of short circuits.Multi-physics models for battery abuse response prediction have been proposed for nail penetration, 12 the short-time response to crush, 13 and general high-rate discharge pertaining to external short circuits 14 without mechanical loading or a...

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Mechanical behavior of representative volume elements of lithium-ion battery cells under compressive loading conditions

Cited by 157 publications

References 4 publications

Review: Characterization and Modeling of the Mechanical Properties of Lithium-Ion Batteries

Review: Characterization and Modeling of the Mechanical Properties of Lithium-Ion Batteries

Computational model of 18650 lithium-ion battery with coupled strain rate and SOC dependencies

A Simulation Framework for Battery Cell Impact Safety Modeling Using LS-DYNA

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