@article{ref1,
title="Experimental study of self-heating ignition of lithium-ion batteries during storage: effect of the number of cells",
journal="Fire technology",
year="2020",
author="He, Xuanze and Restuccia, Francesco and Zhang, Yue and Hu, Zhenwen and Huang, Xinyan and Fang, Jun and Rein, Guillermo",
volume="56",
number="6",
pages="2649-2669",
abstract="Lithium-ion batteries (LIBs) are widely used as energy storage devices. However, a disadvantage of these batteries is their tendency to ignite and burn, thereby creating a fire hazard. Ignition of LIBs can be triggered by abuse conditions (mechanical, electrical or thermal abuse) or internal short circuit. In addition, ignition could also be triggered by self-heating when LIBs are stacked during storage or transport. However, the open circuit self-heating ignition has received little attention and seems to be misunderstood in the literature. This paper quantifies the self-heating behaviour of LIB by means of isothermal oven experiments. Stacks of 1, 2, 3 and 4 Sanyo prismatic LiCoO2 cells at 30% state of charge were studied. The surface and central temperatures, voltage, and time to ignition were measured. <br><br>RESULTS show that self-heating ignition of open circuit LIBs is possible and its behaviour has three stages: heating up, self-heating and thermal runaway. We find for the first time that, for this battery type, as the number of cells increases from 1 to 4, the critical ambient temperature decreases from 165.5°C to 153°C. A Frank-Kamenetskii analysis using the measured data confirms that ignition is caused by self-heating. Parameters extracted from Frank-Kamenetskii theory are then used to upscale the laboratory results, which shows large enough LIB ensembles could self-ignite at even ambient temperatures. This is the first experimental study of the effect of the number of cells on self-heating ignition of LIBs, contributing to the understanding of this new fire hazard.<p /> <p>Language: en</p>",
language="en",
issn="0015-2684",
doi="10.1007/s10694-020-01011-y",
url="http://dx.doi.org/10.1007/s10694-020-01011-y"
}