Numerical simulation study on two-phase flow of thermal runaway evolution and jet fire of 18650 lithium-ion battery under thermal abuse

Wang, Jia-hao; Jiang, Ziqi; Mei, Mei; Qiu, Huihe; Wang, Ying

doi:10.1016/j.csite.2023.103726

Cited by 4 publications

(4 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Venting and TRP models, which consider venting, use the venting properties gas flow rate and gas velocity as interim parameters to couple models on cell domain level with CFD models. In the studies from [31][32][33]35,36] the simulated maximum vent flow velocities are almost always in the same order of magnitude to our measured velocities and range from 85 ms −1 [31] to approximately 162-178.3 ms −1 [32,33,35], or even up to 340 ms −1 in some cases [36]. However, there are differences in the TR duration and gas flow rate.…”

Section: Discussionsupporting

confidence: 74%

“…The TR lasted more than five seconds except in the study from Mishra et al [36], where it took 2.27 s which is comparable to our measured TR duration with 1.718 ± 1.002 s for high-power and 1.131 ± 0.2909 s for high-energy LIBs. However, the simulated gas flow rates are given with 2.5 gs −1 [31] to 3.5 gs −1 [35] and one order of magnitude lower than our measured gas flow distribution with 22.15 ± 14.70 gs −1 for SonyVTC5A and 27.92 ± 9.500 gs −1 for LGMJ1 cells.…”

Section: Discussionmentioning

confidence: 60%

“…The venting of gases from a single LIB during an abuse process has a major impact on the TRP within a battery system [30]. Therefore, some studies enhanced the TR modeling by flow field simulations to model the vent behavior outside the cell [30][31][32][33][34][35]. A few models considered the ignition of the vent and investigated the jet flame without [33] and with the impact of particles [34,35].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, some studies enhanced the TR modeling by flow field simulations to model the vent behavior outside the cell [30][31][32][33][34][35]. A few models considered the ignition of the vent and investigated the jet flame without [33] and with the impact of particles [34,35]. They all determined the properties of ejected gases based on pressure behavior of an ideal gas and a given gas composition.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Mechanical Measurement Approach to Characterize Venting Behavior during Thermal Runaway of 18650 Format Lithium-Ion Batteries

Gillich,

Steinhardt,

Fedoryshyna

et al. 2024

Batteries

View full text Add to dashboard Cite

The propagation of thermal runaway in a battery system is safety-critical in almost every application, such as electric vehicles or home storage. Abuse models can help to undestand propagation mechanisms and assist in designing safe battery systems, but need to be well-parametrized. Most of the heat during thermal runaway is released by venting that is why the characteristic of the vent flow plays an important part in the safety assessment. During venting, the cell generates a recoil force like a rocket, which depends on the flow speed and flow rate of the gas. This principle is used in this work to measure the velocity and mass flow rate of the vent gas. High-power and high-energy 18650 format lithium-ion batteries were overheated and the recoil and weight forces were measured to determine the venting parameter during thermal runaway. Our results show, that the linearized gas flow rate for the high-power and high-energy cell is 22.15gs−1 and 27.92gs−1, respectively. The progress of the gas velocity differs between the two cell types and in case of the high-energy cell, it follows a single peak asymmetrical pattern with a peak of 398.5ms−1, while the high-power cell shows a bumpy pattern with a maximum gas velocity of 260.9ms−1. The developed test bench and gained results can contribute insights in the venting behavior, characterize venting, support safety assessments, simulations and pack design studies.

show abstract