Correct me if I'm wrong but these incidents are sometimes triggered by charging, but never escalated by it.
Once the layers of the cell make contact it shorts the entire battery and causes the battery to discharge quickly, releasing the energy in the form of heat.
Just because you've removed the power source from the battery doesn't mean the battery won't stop discharging.
Once the layers of the cell make contact it shorts the entire battery and causes the battery to discharge quickly, releasing the energy in the form of heat.
Just because you've removed the power source from the battery doesn't mean the battery won't stop discharging.