Plasma arc generated vapour cloud from nail penetration of lithium-ion modules?

Abstract The pre-ignition stage following nail penetration of 1.67 kWh NMC(532) pouch cell modules at State-of-Charge ≤ 40% is associated with temperatures too low for combustion or pyrolysis (< 40°C), yet large volumes of a vapour cloud are produced. The vapour cloud is associated directly with a blue emission and it is suggested that this emission is due to the nitrogen in a plasma arc. Plasmas are increasingly associated with highly novel chemical processes.