Damage of prismatic lithium‐ion cells subject to bending: Test, model, and detection
Abstract
Abstract The mechanically induced internal short circuit (ISC) is one of the major safety concerns of lithium‐ion batteries. Mechanical abuse tests are often performed to evaluate the integrity and safety of lithium‐ion batteries under mechanical loadings. Except for the widely explored compression‐dominated indentation tests, bending is another typical real‐world loading condition that is tension‐dominated. To investigate the mechanical damage and ISC behavior of batteries under bending, we carried out controlled three‐point bending tests in four progressive steps on prismatic battery cells with maximum deflections ranging from 38% to 76% of the cell thickness. None of the tested cells experienced an ISC. We then conducted 3D X‐ray computed tomography (CT) scanning on the bent cells after unloading. X‐ray CT images showed three out of the four tested cells have extensive cracking in the electrode layers at the bottom side (opposite to the loading head). This indicates that cracking does not necessarily lead to an ISC under bending. Electrochemical impedance spectroscopy was also measured on the bent cells and substantial changes were observed. Both the bulk resistance and charge‐transfer resistance increased significantly after bending, which could influence the battery performance and lifespan. We then developed a detailed finite (FE) element model tomore »
- Authors:
-
- Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge Massachusetts USA
- School of Vehicle and Mobility, Tsinghua University Beijing China
- Materials Science Technology Division, Oak Ridge National Laboratory Oak Ridge Tennessee USA
- Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge Massachusetts USA, Department of Mechanical and Industrial Engineering Northeastern University Boston Massachusetts USA
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Electricity (OE)
- OSTI Identifier:
- 1876506
- Alternate Identifier(s):
- OSTI ID: 1877483; OSTI ID: 1996058
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Published Article
- Journal Name:
- EcoMat
- Additional Journal Information:
- Journal Name: EcoMat Journal Volume: 4 Journal Issue: 6; Journal ID: ISSN 2567-3173
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- China
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; three-point bending; X-ray computed tomography; impedance behavior; lithium-ion battery; finite element model; internal short circuit
Citation Formats
Li, Wei, Xing, Bobin, Watkins, Thomas R., Xia, Yong, Wang, Hsin, and Zhu, Juner. Damage of prismatic lithium‐ion cells subject to bending: Test, model, and detection. China: N. p., 2022.
Web. doi:10.1002/eom2.12257.
Li, Wei, Xing, Bobin, Watkins, Thomas R., Xia, Yong, Wang, Hsin, & Zhu, Juner. Damage of prismatic lithium‐ion cells subject to bending: Test, model, and detection. China. https://doi.org/10.1002/eom2.12257
Li, Wei, Xing, Bobin, Watkins, Thomas R., Xia, Yong, Wang, Hsin, and Zhu, Juner. Sun .
"Damage of prismatic lithium‐ion cells subject to bending: Test, model, and detection". China. https://doi.org/10.1002/eom2.12257.
@article{osti_1876506,
title = {Damage of prismatic lithium‐ion cells subject to bending: Test, model, and detection},
author = {Li, Wei and Xing, Bobin and Watkins, Thomas R. and Xia, Yong and Wang, Hsin and Zhu, Juner},
abstractNote = {Abstract The mechanically induced internal short circuit (ISC) is one of the major safety concerns of lithium‐ion batteries. Mechanical abuse tests are often performed to evaluate the integrity and safety of lithium‐ion batteries under mechanical loadings. Except for the widely explored compression‐dominated indentation tests, bending is another typical real‐world loading condition that is tension‐dominated. To investigate the mechanical damage and ISC behavior of batteries under bending, we carried out controlled three‐point bending tests in four progressive steps on prismatic battery cells with maximum deflections ranging from 38% to 76% of the cell thickness. None of the tested cells experienced an ISC. We then conducted 3D X‐ray computed tomography (CT) scanning on the bent cells after unloading. X‐ray CT images showed three out of the four tested cells have extensive cracking in the electrode layers at the bottom side (opposite to the loading head). This indicates that cracking does not necessarily lead to an ISC under bending. Electrochemical impedance spectroscopy was also measured on the bent cells and substantial changes were observed. Both the bulk resistance and charge‐transfer resistance increased significantly after bending, which could influence the battery performance and lifespan. We then developed a detailed finite (FE) element model to further investigate the mechanical deformation and failure mechanisms. The FE model successfully predicts the load–displacement response and reproduces the deformation patterns. The findings and the FE model developed in the present study provide useful insights and tools for the battery structure and crash safety design. image},
doi = {10.1002/eom2.12257},
journal = {EcoMat},
number = 6,
volume = 4,
place = {China},
year = {Sun Jul 17 00:00:00 EDT 2022},
month = {Sun Jul 17 00:00:00 EDT 2022}
}
https://doi.org/10.1002/eom2.12257
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