for my local fire department. I see fires this horrific in multi-story buildings and I see thermal runaway events with Li ion batteries as a likely starting point. When electric scooter batteries go into thermal runaway the fire's temperature can reach over 700 degrees F in less than a second.
NYC is dealing with more and more of these fires so it would be no surprise if the Chinese are dealing with similar situations.
The stuff burns fast and hot and produces incredibly toxic smoke.
What I'm suggesting is that Li ion batteries provide an ignition source that is so hot and so intense that all that fuel was immediately involved. The difference between a smoldering grass fire vs a fire in dense fuel with flames jumping from tree crown to crown.
They know why such fires are happening but I don't see much of a solution in the offing beyond telling people not to drop them.
bouncing them around on your e-bike, e-scooter, e-skateboard is certainly one. Other issues: poorly constructed cells, charging too quickly, mis-matched chargers are some that come immediately to mind. Another problem, the heat wave currently affecting most of Asia is adding to the potential for failure.
Just a lot of bad things all coming together at once.
Picture, if you will, a parking garage under an average office building, in an average town, on an average day. Little did the people who were charging their EV's underground, all grouped together, know that one of those vehicles had a battery pack from Mars, with no cooling system. Neither did the rest of the occupants of the building. Please review our current offering as we view the visit of the entire building,and its occupants, to the "Thermal Runaway Zone".