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We present measurements of controlled Li-ion battery explosions using high-speed infrared thermography to elucidate the effects of this phenomenon. In one study, commercial Li-ion batteries were perturbed by slow heating and by rapid puncture at various states of charge (SOC). The results indicate that the SOC has a significant impact on the magnitude of the battery explosion, regardless of the way the battery is perturbed. Another study tested varied heating rates in thermal abuse tests and showed that faster heating also leads to more violent thermal runaway. Within those measurements, the plumes emanating from the safety vents on the batteries were clearly observed. This work focuses on the propagation of the explosion immediately after the battery detonation event and the implications of the results for designing safer, more reliable Li-ion battery systems.
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Joseph Carrock, Antoine Dumont, Mark Norman, Alex Côté, "High-speed infrared thermography of Li-ion battery explosion dynamics," Proc. SPIE 13047, Thermosense: Thermal Infrared Applications XLVI, 130470N (10 June 2024); https://doi.org/10.1117/12.3013792