Irregularities along the manufacturing process seem to cause cell damage or errors in the battery management system which can lead to an internal short circuit.

This can lead to a heating of the affected cell and furthermore an evaporation of the organic electrolyte liquid, which results in the generation of flammable gases. If the temperature in the cell exceeds the flash point of one of these gases, this organic gas can combust and set the li-ion cell on fire. Since this is a self-reinforcing process, it can lead to so-called thermal runaway and thus cause fire to break out throughout the whole battery.

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