Preventing Li-ion cell explosion during thermal runaway with reduced pressure

•Increase of Li-ion cell safety by reduced pressure.•Li-ion cell thermal runaway without cell explosion.•Reduced pressure via vacuum pump or suction unit. Concerning Li-ion cells it is demonstrated by overcharging tests both on the shelf in a fume-hood and in an accelerating rate calorimeter that th...

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Veröffentlicht in:Applied thermal engineering 2017-09, Vol.124, p.539-544
Hauptverfasser: Hofmann, Andreas, Uhlmann, Nils, Ziebert, Carlos, Wiegand, Olivia, Schmidt, Alexander, Hanemann, Thomas
Format: Artikel
Sprache:eng
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Zusammenfassung:•Increase of Li-ion cell safety by reduced pressure.•Li-ion cell thermal runaway without cell explosion.•Reduced pressure via vacuum pump or suction unit. Concerning Li-ion cells it is demonstrated by overcharging tests both on the shelf in a fume-hood and in an accelerating rate calorimeter that the application of reduced pressure in the moment of a thermal runaway accident can prevent a fire and in particular a cell explosion, caused by the electrolyte. Within the experiment, pouch-bag Li-ion cells (88mAh and 264mAh) composed of graphite and NMC (LiNi1/3Mn1/3Co1/3O2) were overcharged by 10C in order to induce a thermal runaway. In spite of a strong temperature increase, the cell remains tightly close during the thermal runaway without any fire or explosion in case of vacuum application.
ISSN:1359-4311
1873-5606
DOI:10.1016/j.applthermaleng.2017.06.056