Looking Deeper into the Galaxy (Note 7)
Li-ion cell designs, component integrity, and manufacturing processes all have critical influence on the safety of Li-ion batteries. Any internal defective features that induce a short circuit, can trigger a thermal runaway: a cascade of reactions, leading to a device fire. As consumer device manufa...
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MDPI AG
2018-01-01
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Online Access: | http://www.mdpi.com/2313-0105/4/1/3 |
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doaj-a327df779b994ef680b729d0ae0ecd632020-11-24T21:11:58ZengMDPI AGBatteries2313-01052018-01-0141310.3390/batteries4010003batteries4010003Looking Deeper into the Galaxy (Note 7)Melanie J. Loveridge0Guillaume Remy1Nadia Kourra2Ronny Genieser3Anup Barai4Mike J. Lain5Yue Guo6Mark Amor-Segan7Mark A. Williams8Tazdin Amietszajew9Mark Ellis10Rohit Bhagat11David Greenwood12WMG, Warwick University, Coventry CV4 7AL, UKWMG, Warwick University, Coventry CV4 7AL, UKWMG, Warwick University, Coventry CV4 7AL, UKWMG, Warwick University, Coventry CV4 7AL, UKWMG, Warwick University, Coventry CV4 7AL, UKWMG, Warwick University, Coventry CV4 7AL, UKWMG, Warwick University, Coventry CV4 7AL, UKWMG, Warwick University, Coventry CV4 7AL, UKWMG, Warwick University, Coventry CV4 7AL, UKWMG, Warwick University, Coventry CV4 7AL, UKWMG, Warwick University, Coventry CV4 7AL, UKWMG, Warwick University, Coventry CV4 7AL, UKWMG, Warwick University, Coventry CV4 7AL, UKLi-ion cell designs, component integrity, and manufacturing processes all have critical influence on the safety of Li-ion batteries. Any internal defective features that induce a short circuit, can trigger a thermal runaway: a cascade of reactions, leading to a device fire. As consumer device manufacturers push aggressively for increased battery energy, instances of field failure are increasingly reported. Notably, Samsung made a press release in 2017 following a total product recall of their Galaxy Note 7 mobile phone, confirming speculation that the events were attributable to the battery and its mode of manufacture. Recent incidences of battery swelling on the new iPhone 8 have been reported in the media, and the techniques and lessons reported herein may have future relevance. Here we look deeper into the key components of one of these cells and confirm evidence of cracking of electrode material in tightly folded areas, combined with a delamination of surface coating on the separator, which itself is an unusually thin monolayer. We report microstructural information about the electrodes, battery welding attributes, and thermal mapping of the battery whilst operational. The findings present a deeper insight into the battery’s component microstructures than previously disseminated. This points to the most probable combination of events and highlights the impact of design features, whilst providing structural considerations most likely to have led to the reported incidences relating to this phone.http://www.mdpi.com/2313-0105/4/1/3Li-ion batterysafetymicrostructure |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Melanie J. Loveridge Guillaume Remy Nadia Kourra Ronny Genieser Anup Barai Mike J. Lain Yue Guo Mark Amor-Segan Mark A. Williams Tazdin Amietszajew Mark Ellis Rohit Bhagat David Greenwood |
spellingShingle |
Melanie J. Loveridge Guillaume Remy Nadia Kourra Ronny Genieser Anup Barai Mike J. Lain Yue Guo Mark Amor-Segan Mark A. Williams Tazdin Amietszajew Mark Ellis Rohit Bhagat David Greenwood Looking Deeper into the Galaxy (Note 7) Batteries Li-ion battery safety microstructure |
author_facet |
Melanie J. Loveridge Guillaume Remy Nadia Kourra Ronny Genieser Anup Barai Mike J. Lain Yue Guo Mark Amor-Segan Mark A. Williams Tazdin Amietszajew Mark Ellis Rohit Bhagat David Greenwood |
author_sort |
Melanie J. Loveridge |
title |
Looking Deeper into the Galaxy (Note 7) |
title_short |
Looking Deeper into the Galaxy (Note 7) |
title_full |
Looking Deeper into the Galaxy (Note 7) |
title_fullStr |
Looking Deeper into the Galaxy (Note 7) |
title_full_unstemmed |
Looking Deeper into the Galaxy (Note 7) |
title_sort |
looking deeper into the galaxy (note 7) |
publisher |
MDPI AG |
series |
Batteries |
issn |
2313-0105 |
publishDate |
2018-01-01 |
description |
Li-ion cell designs, component integrity, and manufacturing processes all have critical influence on the safety of Li-ion batteries. Any internal defective features that induce a short circuit, can trigger a thermal runaway: a cascade of reactions, leading to a device fire. As consumer device manufacturers push aggressively for increased battery energy, instances of field failure are increasingly reported. Notably, Samsung made a press release in 2017 following a total product recall of their Galaxy Note 7 mobile phone, confirming speculation that the events were attributable to the battery and its mode of manufacture. Recent incidences of battery swelling on the new iPhone 8 have been reported in the media, and the techniques and lessons reported herein may have future relevance. Here we look deeper into the key components of one of these cells and confirm evidence of cracking of electrode material in tightly folded areas, combined with a delamination of surface coating on the separator, which itself is an unusually thin monolayer. We report microstructural information about the electrodes, battery welding attributes, and thermal mapping of the battery whilst operational. The findings present a deeper insight into the battery’s component microstructures than previously disseminated. This points to the most probable combination of events and highlights the impact of design features, whilst providing structural considerations most likely to have led to the reported incidences relating to this phone. |
topic |
Li-ion battery safety microstructure |
url |
http://www.mdpi.com/2313-0105/4/1/3 |
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