this post was submitted on 01 Jan 2025
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That’s the first video I’ve seen. It looks almost like fireworks. I’ve only seen smaller batteries explode, but it doesn’t look like this.
That is absolutely not how batteries burn. They offgas hydrogen and that ignites. Like this: https://youtu.be/AWi7AeZaNcI
It’s less of an explosion and more of a fast burning flame.
Another example: https://youtu.be/T71cVhxG_v4
Another: https://youtu.be/N98VFQGsxIc
This truck looks like it was blown up.
Hydrogen? It's evaporated solvents.
Well I stand corrected. I was always told it was hydrogen gas. Looks like that’s a myth propagated by earlier open-cell varieties that would vent hydrogen during normal operation.
What I do know from experience is that the gases smell like toothpaste. At least in the smaller lipo jelly roll packs
It used to be hydrogen when charging lead acid batteries, for example. NiMH also produces hydrogen once they are full, but that is internally converted back to water via a catalyst (hence they can be charged at 1/10 forever with only getting warm).
Not sure which chemistry would produce hydrogen during a thermal runaway event.
That’s how I expected it to look, like a scaled up laptop battery fire.
What do you think those rocket-like projectiles are in the posted video? They honestly look like fireworks, like jumping jacks or helicopters.
The updated version of the article says it might just be fireworks. It’s Las Vegas and New Years. Not to mention there’s probably a decent intersection between Cybertruck owners and illegal fireworks enthusiasts.
Well that's not much of a venn diagram then, just a circle of the entire population with a smaller circle of Cybertruck owners. Because those are the best fireworks.
Lead acid batteries can off-gas hydrogen.
Not sure exactly what liion batteries create other than 'vapor'. It certainly can explode in a similar way.
https://www.evfiresafe.com/ is a good resource on ev fire behaviour.
Happy New Year festivities gone wrong?
Sure looks like it.
That's because it is. Someone stuffed their Trunk full of Fireworks and set them off.