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Title: Effect of packaging and cooling plates on mechanical response and failure characteristics of automotive Li-ion battery modules

Abstract

When a battery pack is subjected to external mechanical load, i.e. as in the case of crash, the individual cells experience significant deformations leading to the internal short circuit and possibly fire. The current investigation looks into effects of the inactive components (i.e. cooling plates and module protective enclosure) on deformation and failure of individual pouch cells. Experiments on large spherical indentation of electric vehicle battery module with and without such components have been performed. The results show that the presence of cooling plates overall reduces the force under out-of-plane indentation by approximately a factor of 1.5. It was established however that the failure in cells occurs at the same displacement of the indenter, regardless of the presence of the inactive elements in battery module structure. This underlines the necessity for formulation of the failure criterion based on critical strain, rather than critical stress measure. The findings suggest possibility of utilizing such battery modules in impact energy absorption scenarios, due to reduction in force by the cooling components. X-Ray computed tomography (XCT) has been performed on the cells as a non-destructive analysis of internal failure and the differences of failure mode induced by introduction of structural components are discussed.

Authors:
 [1]; ORCiD logo [1];  [1];  [1];  [1]; ORCiD logo [1];  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. National Highway Traffic Safety Administration, Washington, DC (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1476421
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 403; Journal Issue: C; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Kalnaus, Sergiy, Wang, Hsin, Watkins, Thomas R., Kumar, Abhishek, Simunovic, Srdjan, Turner, John A., and Gorney, Phillip. Effect of packaging and cooling plates on mechanical response and failure characteristics of automotive Li-ion battery modules. United States: N. p., 2018. Web. doi:10.1016/j.jpowsour.2018.09.071.
Kalnaus, Sergiy, Wang, Hsin, Watkins, Thomas R., Kumar, Abhishek, Simunovic, Srdjan, Turner, John A., & Gorney, Phillip. Effect of packaging and cooling plates on mechanical response and failure characteristics of automotive Li-ion battery modules. United States. doi:10.1016/j.jpowsour.2018.09.071.
Kalnaus, Sergiy, Wang, Hsin, Watkins, Thomas R., Kumar, Abhishek, Simunovic, Srdjan, Turner, John A., and Gorney, Phillip. Fri . "Effect of packaging and cooling plates on mechanical response and failure characteristics of automotive Li-ion battery modules". United States. doi:10.1016/j.jpowsour.2018.09.071. https://www.osti.gov/servlets/purl/1476421.
@article{osti_1476421,
title = {Effect of packaging and cooling plates on mechanical response and failure characteristics of automotive Li-ion battery modules},
author = {Kalnaus, Sergiy and Wang, Hsin and Watkins, Thomas R. and Kumar, Abhishek and Simunovic, Srdjan and Turner, John A. and Gorney, Phillip},
abstractNote = {When a battery pack is subjected to external mechanical load, i.e. as in the case of crash, the individual cells experience significant deformations leading to the internal short circuit and possibly fire. The current investigation looks into effects of the inactive components (i.e. cooling plates and module protective enclosure) on deformation and failure of individual pouch cells. Experiments on large spherical indentation of electric vehicle battery module with and without such components have been performed. The results show that the presence of cooling plates overall reduces the force under out-of-plane indentation by approximately a factor of 1.5. It was established however that the failure in cells occurs at the same displacement of the indenter, regardless of the presence of the inactive elements in battery module structure. This underlines the necessity for formulation of the failure criterion based on critical strain, rather than critical stress measure. The findings suggest possibility of utilizing such battery modules in impact energy absorption scenarios, due to reduction in force by the cooling components. X-Ray computed tomography (XCT) has been performed on the cells as a non-destructive analysis of internal failure and the differences of failure mode induced by introduction of structural components are discussed.},
doi = {10.1016/j.jpowsour.2018.09.071},
journal = {Journal of Power Sources},
number = C,
volume = 403,
place = {United States},
year = {2018},
month = {9}
}

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