Features of mechanical behavior of EV battery modules under high deformation rate

Kalnaus, Sergiy; Wang, Hsin; Watkins, Thomas R.; Simunovic, Srdjan; Sengupta, Abhijit

doi:10.1016/j.eml.2019.100550

Title: Features of mechanical behavior of EV battery modules under high deformation rate

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Abstract

Here, we observe changes in material behavior of electric vehicle (EV) Li-ion battery cell modules when the loading speed increases from quasi-static to high speed (close to 1 m/s). A series of out-of-plane indentation experiments were performed on stacks of pouch cells placed in the specially designed enclosure to represent conditions in battery modules. Over one hundred of large format automotive pouch cells were tested under displacement rates differing by orders of magnitude. The details of internal failure were studied by X-ray tomography (XCT). We determine a shift in the force–displacement response from a parabolic behavior characteristic of particulate materials under compression to the response normal of fully dense materials with yield point. This shift is associated with dynamic effects in active materials which result in deep propagation of damage into the battery module, despite the fact that the internal short circuit is triggered when the displacement of the indenter is one half of that under the slow displacement rate.

Authors:

^[1];

^[1]; Sengupta, Abhijit ^[2]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
US Dept. of Transportation, Washington, DC (United States)

Publication Date:: Wed Aug 28 00:00:00 EDT 2019

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE; National Highway Traffic Safety Administration

OSTI Identifier:: 1560455

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Extreme Mechanics Letters

Additional Journal Information:: Journal Volume: 32; Journal Issue: C; Journal ID: ISSN 2352-4316

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 25 ENERGY STORAGE; Li-ion battery; Automotive; Mechanics; Safety

Citation Formats


                    Kalnaus, Sergiy, Wang, Hsin, Watkins, Thomas R., Simunovic, Srdjan, and Sengupta, Abhijit. Features of mechanical behavior of EV battery modules under high deformation rate.  United States: N. p., 2019. 
Web.  doi:10.1016/j.eml.2019.100550.

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                    Kalnaus, Sergiy, Wang, Hsin, Watkins, Thomas R., Simunovic, Srdjan, & Sengupta, Abhijit. Features of mechanical behavior of EV battery modules under high deformation rate.  United States.  https://doi.org/10.1016/j.eml.2019.100550

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                    Kalnaus, Sergiy, Wang, Hsin, Watkins, Thomas R., Simunovic, Srdjan, and Sengupta, Abhijit. Wed .  
"Features of mechanical behavior of EV battery modules under high deformation rate".  United States.  https://doi.org/10.1016/j.eml.2019.100550.  https://www.osti.gov/servlets/purl/1560455.

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@article{osti_1560455,

  title        = {Features of mechanical behavior of EV battery modules under high deformation rate},

  author       = {Kalnaus, Sergiy and Wang, Hsin and Watkins, Thomas R. and Simunovic, Srdjan and Sengupta, Abhijit},

  abstractNote = {Here, we observe changes in material behavior of electric vehicle (EV) Li-ion battery cell modules when the loading speed increases from quasi-static to high speed (close to 1 m/s). A series of out-of-plane indentation experiments were performed on stacks of pouch cells placed in the specially designed enclosure to represent conditions in battery modules. Over one hundred of large format automotive pouch cells were tested under displacement rates differing by orders of magnitude. The details of internal failure were studied by X-ray tomography (XCT). We determine a shift in the force–displacement response from a parabolic behavior characteristic of particulate materials under compression to the response normal of fully dense materials with yield point. This shift is associated with dynamic effects in active materials which result in deep propagation of damage into the battery module, despite the fact that the internal short circuit is triggered when the displacement of the indenter is one half of that under the slow displacement rate.},

  doi          = {10.1016/j.eml.2019.100550},

  journal      = {Extreme Mechanics Letters},

  number       = C,

  volume       = 32,

  place        = {United States},

  year         = {Wed Aug 28 00:00:00 EDT 2019},

  month        = {Wed Aug 28 00:00:00 EDT 2019}

}

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