Computational models for simulations of lithium-ion battery cells under constrained compression tests

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

doi:10.1016/j.jpowsour.2013.05.022

Cited by 112 publications

(51 citation statements)

References 14 publications

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“…The bending radius is bounded by the thickness of the electrodes, so that sharp kinks do not form initially. The bending of metals allows for much higher surface strains than the uniaxial loading, and such behavior is clearly demonstrated by the in-plane compressive deformation of battery jellyrolls [9,26]. Continuous jamming and sharpening of the cusps may eventually lead to tearing or puncture of the separator and an electrical short.…”

Section: Experiments Interpretation and Possible Mechanisms Of Deformamentioning

confidence: 99%

Internal configuration of prismatic lithium-ion cells at the onset of mechanically induced short circuit

Wang

Simunovic

Maleki

et al. 2016

Journal of Power Sources

101

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The response of Li-ion cells to mechanically induced internal electrical shorts is an important safety performance metric design. We assume that the battery internal configuration at the onset of electrical short influences the subsequent response and can be used to gage the safety risk. We subjected a series of prismatic Li-ion cells to lateral pinching using 0.25", 0.5", 1", 2" and 3" diameter steel balls until the onset of internal short. The external aluminum enclosure froze the internal cell configuration at the onset of short and enabled us to cross-section the cells, and take the cross-section images.. The images indicate that an internal electric short is preceded by extensive strain partitioning in the cells, fracturing and tearing of the current collectors, cracking and slipping of the electrode layers with multiple fault lines across multiple layers. These observations are at odds with common notion of homogeneous deformation across the layers and strain hardening of electrodes that eventually punch through the separator and short the cell. The faults are akin to tectonic movements of multiple layers that are characteristic of granular materials and bonded aggregates. The short circuits occur after extensive internal faulting, which implies significant stretching and tearing of separators.

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Section: Experiments Interpretation and Possible Mechanisms Of Deformamentioning

confidence: 99%

Internal configuration of prismatic lithium-ion cells at the onset of mechanically induced short circuit

Wang

Simunovic

Maleki

et al. 2016

Journal of Power Sources

101

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5][6][7][8] Some studies have shown possible methods of predicting failure and onset of short circuit under mechanical deformation. Currently, the mechanical deformation of batteries is not a major issue for stationary uses, but this is not the case for automobile applications.…”

Section: Introductionmentioning

confidence: 99%

Modelling of cracks developed in lithium-ion cells under mechanical loading

et al. 2015

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This research reports on an experimental and numerical study of material failure in the electrode assemblies (i.e. "jelly roll" and/or "electrode stack") of lithium-ion batteries after local mechanical loading. Deformed cylindrical and pouch cells (i.e. lithium-ion polymer cells) were subjected to X-ray computed tomography (CT scanning) to detect location, size, and orientation of cracks that developed in the electrode assemblies at onset of short-circuit. An experimental program was completed to acquire properties of electrode-separator micro components of electrode assemblies in tension. This data was used for calibration of an anisotropic material model. Finite element models were developed for both cell types and a maximum strain criteria was used for element failure and deletion at short circuit. The models developed here predict the location of cracks in both pouch and cylindrical cells. The finite element models corroborated the CT scan regarding location and orientation of cracks formed in the electrode assemblies. In both pouch and cylindrical cells, cracks were found to initiate perpendicular to the transverse direction of the separator. Fig. 3 Simulation of the crack through element erosion using the two models for 18650 cell. 80372 | RSC Adv., 2015, 5, 80369-80380 This journal is

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“…Ali et al developed a detailed layered model of cell RVE specimens of Li-ion battery cells under quasi-static constrained in-plane compression loading in ABAQUS/explicit (Dassault Systèmes, Vélizy-Villacoublay, France) [55]. The buckling analysis previously reported in [54] justified the cell RVE length selection in FE simulations.…”

Section: Pouched Cellsmentioning

confidence: 98%

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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Computational models for simulations of lithium-ion battery cells under constrained compression tests

Cited by 112 publications

References 14 publications

Internal configuration of prismatic lithium-ion cells at the onset of mechanically induced short circuit

Internal configuration of prismatic lithium-ion cells at the onset of mechanically induced short circuit

Modelling of cracks developed in lithium-ion cells under mechanical loading

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

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