Characterization of thermal cut-off mechanisms in prismatic lithium-ion batteries

Venugopal, Ganesh

doi:10.1016/s0378-7753(01)00782-0

Cited by 129 publications

(63 citation statements)

References 5 publications

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“…The polymer separator melts at around 130 °C [22], allowing short circuits between electrodes. Hereafter, the metal oxide cathode materials decompose and react with the solvent at 150-500 °C [23][24][25]. Large quantities of heat are generated from these reactions, leading to the thermal runaway of the battery in the end.…”

Section: Battery Surface Temperaturementioning

confidence: 99%

Investigation into the Fire Hazards of Lithium-Ion Batteries under Overcharging

et al. 2017

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Numerous lithium-ion battery (LIB) fires and explosions have raised serious concerns about the safety issued associated with LIBs; some of these incidents were mainly caused by overcharging of LIBs. Therefore, to have a better understanding of the fire hazards caused by LIB overcharging, two widely used commercial LIBs, nickel manganese cobalt oxide (NMC) and lithium iron phosphate (LFP), with different cut-off voltages (4.2 V, 4.5 V, 4.8 V and 5.0 V), were tested in this work. Some parameters including the surface temperature, the flame temperature, voltage, and radiative heat flux were measured and analyzed. The results indicate that the initial discharging voltage increases with the growth of charge cut-off voltage. Moreover, the higher the cut-off voltage, the longer the discharging time to reach 2.5 V. An overcharged LIB will undergo a more violent combustion process and has lower stability than a normal one, and the increasing cut-off voltage aggravates the severity. In addition, it is also revealed that the NMC fails earlier than the LFP under the same condition. The temperatures for safety vent cracking, ignition, and thermal runaway of LIBs exhibit similar values for the same condition, which demonstrates that the LIB will fail at a certain temperature. Finally, the peak heat flux, total radiative heat flux, and total radiative heat will rise with the increase in voltage.

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Section: Battery Surface Temperaturementioning

confidence: 99%

Investigation into the Fire Hazards of Lithium-Ion Batteries under Overcharging

et al. 2017

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“…[67][68][69][70] Two types of techniques have been developed to address the thermal runaway problem. One method is to inhibit heat generation by adopting alternative electrolytes, e.g., polymer gel electrolytes and solid-state electrolytes with low ionic conductivities.…”

Section: Smart Design To Avoid Overheatingmentioning

confidence: 99%

Smart Electrochemical Energy Storage Devices with Self‐Protection and Self‐Adaptation Abilities

Yang

Wang

et al. 2017

Advanced Materials

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Currently, with booming development and worldwide usage of rechargeable electrochemical energy storage devices, their safety issues, operation stability, service life, and user experience are garnering special attention. Smart and intelligent energy storage devices with self‐protection and self‐adaptation abilities aiming to address these challenges are being developed with great urgency. In this Progress Report, we highlight recent achievements in the field of smart energy storage systems that could early‐detect incoming internal short circuits and self‐protect against thermal runaway. Moreover, intelligent devices that are able to take actions and self‐adapt in response to external mechanical disruption or deformation, i.e., exhibiting self‐healing or shape‐memory behaviors, are discussed. Finally, insights into the future development of smart rechargeable energy storage devices are provided.

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“…The authors measured the heat released for LiMn 2 O 4 and LiCoO 2 cells at 0.2C rate for 160-180% overcharging current. Venugopal (Venugopal, 2001) showed that the vulnerability of battery is due to battery abuse which becomes less severe due to shutdown function of polyolefin separator membranes where the melting of the separator prevents the ionic flow through the pores, thereby minimizes the passage of current thus stopping the cell thermal runaway. In (Spotnitz & Franklin, 2003) the abuse test on lithium-ion cells through modeling showed that the fluorinated binder plays relatively unimportant role in thermal runaway.…”

Section: Abuse Test Behavior Of the Cellsmentioning

confidence: 99%