Controlling Factors of Cell Design on Large-format Li-ion Battery Safety During Nail Penetration
In this paper we investigate the controlling design parameters of large-format Li-ion batteries on safety while undergoing nail penetration. We have identified three critical design parameters that control the safety during the nail penetration process: nail diameter, single sheet foil area, and ce...
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doaj-80c42ba8c3e840c8896093e7e929d5dc2020-11-25T00:48:03ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2015-08-01310.3389/fenrg.2015.00035156690Controlling Factors of Cell Design on Large-format Li-ion Battery Safety During Nail PenetrationQing eWang0Christian Edward Shaffer1Puneet K. Sinha2EC PowerEC PowerEC PowerIn this paper we investigate the controlling design parameters of large-format Li-ion batteries on safety while undergoing nail penetration. We have identified three critical design parameters that control the safety during the nail penetration process: nail diameter, single sheet foil area, and cell capacity.Using commercial AutoLion software, we have investigated two typical design problems related to the selection of cell thickness and aspect ratio, namely: (1) the safety ramifications of increasing cell capacity via greater cell thickness for a fixed footprint, and (2) the effect of aspect ratio, or single sheet foil size, on safety at a given capacity. For a fixed footprint, our results indicate that the safety of the cell can be predicted by (Qcell Dnail^-0.5). For a given cell capacity, our results indicate that typically a larger single sheet foil area leads to a greater likelihood for thermal runaway due to its effect of making the heating more local in nature; however, for small cells (~ 5Ah) and large nails (~ 20mm), the greater aspect ratio can lead to a safer cell, as the greater surface area strongly cools the global heating of the cell.http://journal.frontiersin.org/Journal/10.3389/fenrg.2015.00035/fullSafetysimulationLi-ion batteryNail penetrationlarge-format battery |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Qing eWang Christian Edward Shaffer Puneet K. Sinha |
spellingShingle |
Qing eWang Christian Edward Shaffer Puneet K. Sinha Controlling Factors of Cell Design on Large-format Li-ion Battery Safety During Nail Penetration Frontiers in Energy Research Safety simulation Li-ion battery Nail penetration large-format battery |
author_facet |
Qing eWang Christian Edward Shaffer Puneet K. Sinha |
author_sort |
Qing eWang |
title |
Controlling Factors of Cell Design on Large-format Li-ion Battery Safety During Nail Penetration |
title_short |
Controlling Factors of Cell Design on Large-format Li-ion Battery Safety During Nail Penetration |
title_full |
Controlling Factors of Cell Design on Large-format Li-ion Battery Safety During Nail Penetration |
title_fullStr |
Controlling Factors of Cell Design on Large-format Li-ion Battery Safety During Nail Penetration |
title_full_unstemmed |
Controlling Factors of Cell Design on Large-format Li-ion Battery Safety During Nail Penetration |
title_sort |
controlling factors of cell design on large-format li-ion battery safety during nail penetration |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Energy Research |
issn |
2296-598X |
publishDate |
2015-08-01 |
description |
In this paper we investigate the controlling design parameters of large-format Li-ion batteries on safety while undergoing nail penetration. We have identified three critical design parameters that control the safety during the nail penetration process: nail diameter, single sheet foil area, and cell capacity.Using commercial AutoLion software, we have investigated two typical design problems related to the selection of cell thickness and aspect ratio, namely: (1) the safety ramifications of increasing cell capacity via greater cell thickness for a fixed footprint, and (2) the effect of aspect ratio, or single sheet foil size, on safety at a given capacity. For a fixed footprint, our results indicate that the safety of the cell can be predicted by (Qcell Dnail^-0.5). For a given cell capacity, our results indicate that typically a larger single sheet foil area leads to a greater likelihood for thermal runaway due to its effect of making the heating more local in nature; however, for small cells (~ 5Ah) and large nails (~ 20mm), the greater aspect ratio can lead to a safer cell, as the greater surface area strongly cools the global heating of the cell. |
topic |
Safety simulation Li-ion battery Nail penetration large-format battery |
url |
http://journal.frontiersin.org/Journal/10.3389/fenrg.2015.00035/full |
work_keys_str_mv |
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