Li-ion Battery Separators, Mechanical Integrity and Failure Mechanisms Leading to Soft and Hard Internal Shorts
Name
Li-ion battery.pdf
Size
1.33 MB
Format
Adobe PDF
Checksum (MD5)
3567dc4056bd74d5c9a38d9d8a2cf938
Author(s)
Zhang, Xiaowei
Sahraei Esfahani, Elham
Wang, Kai
Date Issued
September 2016
Journal
Scientific Reports
Publisher
Nature Publishing Group
Citation
Zhang, Xiaowei, Elham Sahraei, and Kai Wang. “Li-Ion Battery Separators, Mechanical Integrity and Failure Mechanisms Leading to Soft and Hard Internal Shorts.” Scientific Reports 6 (2016): 32578.
Version
Final published version
Abstract
Separator integrity is an important factor in preventing internal short circuit in lithium-ion batteries. Local penetration tests (nail or conical punch) often produce presumably sporadic results, where in exactly similar cell and test set-ups one cell goes to thermal runaway while the other shows minimal reactions. We conducted an experimental study of the separators under mechanical loading, and discovered two distinct deformation and failure mechanisms, which could explain the difference in short circuit characteristics of otherwise similar tests. Additionally, by investigation of failure modes, we provided a hypothesis about the process of formation of local “soft short circuits” in cells with undetectable failure. Finally, we proposed a criterion for predicting onset of soft short from experimental data.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Impact and Crashworthiness Laboratory
Terms of Use
Creative Commons Attribution 4.0 International License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/srep32578
