The thermal runaway analysis on LiFePO4 electrical energy storage packs with different venting areas and void volumes

Qin, Peng; Jia, Zhuangzhuang; Wu, Jing‐Yun; Jin, Kaiqiang; Duan, Qiangling; Jiang, Lihua; Sun, Jinhua; Ding, Jinghu; Shi, Cheng; Wang, Qingsong

doi:10.1016/j.apenergy.2022.118767

Cited by 50 publications

(10 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… 40 , 170 , 171 , 172 , 173 , 174 To overcome these challenges, current research often relies on simplifications and assumptions, such as presuming that gas generation rates are proportional to reaction rates 19 , 123 , 166 , 167 , 168 and parameterizing coupling relationships mainly using gas analysis results after TR instead of real-time gas data. 12 , 167 , 175 , 176 , 177 While these approaches may approximate pressure evolution to a certain extent, their accuracy remains a concern.…”

Section: Developing a Multiphysics Coupling Model For Trmentioning

confidence: 99%

“…Calculating the lower explosive limit based on gas identification enables assessing the explosion possibility; 41 , 184 , 185 , 186 , 187 , 188 however, integrating this with actual scenarios is challenging. Recent advancements include explosion behavior analysis through gas diffusion simulation, 12 , 168 , 189 aiding in dynamic risk assessment. Explosion consequences are generally assessed using premixed (or partly premixed) gas explosion models based on CFD.…”

Section: Developing a Multiphysics Coupling Model For Trmentioning

confidence: 99%

“… 6 This disastrous phenomenon can potentially propagate through the battery pack of electric vehicles (EVs) and energy storage systems (ESSs), leading to fire, explosion, and other severe consequences. 11 , 12 Despite ongoing efforts, significantly enhancing the safety level of LIBs in the short term remains a challenge, as evidenced by the increasing incidence of fire and explosion accidents associated with TR. Consequently, the safety issue posed by TR remains a challenge in LIBs, hindering the wider adoption of LIB technology.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Advances and challenges in thermal runaway modeling of lithium-ion batteries

Wang,

Ping,

Kong

et al. 2024

The Innovation

View full text Add to dashboard Cite

Section: Developing a Multiphysics Coupling Model For Trmentioning

confidence: 99%

Section: Developing a Multiphysics Coupling Model For Trmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Advances and challenges in thermal runaway modeling of lithium-ion batteries

Wang,

Ping,

Kong

et al. 2024

The Innovation

View full text Add to dashboard Cite

“…The parameter vent temperature is not listed, because it is studied in a wide range [3,8,[37][38][39][40] and usually measured by placing a thermocouple in front of the vent area. Most of the work has been published by the State Key Laboratory of Fire Science from the University of Science and Technology of China [38,[41][42][43][44][45][46][47]. The first venting is given by the opening of the safety valve due to a critical cell pressure.…”

Section: Introductionmentioning

confidence: 99%

“…A common method to determine the mass flow rate is via the change of cell mass. For that, electronic mass balances or weight sensors are used and placed underneath the LIB during the thermal abuse tests [28,[41][42][43]45,46].…”

Section: Introductionmentioning

confidence: 99%

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

Impact of Aerogel Barrier on Liquid‐Cooled Lithium‐Ion Battery Thermal Management System's Cooling Efficiency

Zeng,

Zhang,

Tian

et al. 2024

Energy Tech

View full text Add to dashboard Cite

Thermal runaway propagation (TRP) in lithium batteries poses significant risks to energy‐storage systems. Therefore, it is necessary to incorporate insulating materials between the batteries to prevent the TRP. However, the incorporation of insulating materials will impact the battery thermal management system (BTMS). In this article, the influence of aerogel insulation on liquid‐cooled BTMS is analyzed employing experiments and simulations. In the experiment results, it is revealed that aerogel reduces heat dissipation from liquid‐cooled battery packs, leading to elevated peak temperatures and steeper temperature gradients. Simulation of battery pack discharge warming based on the 3D model shows that the result matches very well with that in the experiment., indicating a maximum temperature rise from 34.92 to 42.57 °C at 2C when aerogel thickness is increased to 5 mm, alongside a temperature differential expansion from 11.11 to 17.50 °C. Nonetheless, beyond 3 mm thickness, further increases in aerogel thickness cause negligible (<0.1 °C) temperature alterations, defining the saturation thickness of aerogel. Furthermore, maintaining consistent thickness and stacking more aerogel layers do not mitigate its detrimental effects. Interestingly, augmenting the battery's through‐thickness thermal conductivity counteracts the adverse outcomes of aerogel usage.

show abstract

The thermal runaway analysis on LiFePO4 electrical energy storage packs with different venting areas and void volumes

Cited by 50 publications

References 30 publications

Advances and challenges in thermal runaway modeling of lithium-ion batteries

Advances and challenges in thermal runaway modeling of lithium-ion batteries

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

Impact of Aerogel Barrier on Liquid‐Cooled Lithium‐Ion Battery Thermal Management System's Cooling Efficiency

Contact Info

Product

Resources

About