No fire could have occured during the penetration test because the resulting explosion removed all oxygen from the surrounding environment. -s
Comment on Lithium-free sodium batteries exit the lab and enter US production
August27th@lemmy.ca 1 month agoexplosive hazard
Can you elaborate on that? I was just reading the data sheet for these batteries, and these are tested with a ballistic penetration test, resulting in no fire.
I’m presuming this concern is from watching videos of elemental sodium reacting with water, which stands to reason, but I’ve not heard of exploding batteries
AdamEatsAss@lemmy.world 1 month ago
TheObviousSolution@lemm.ee 1 month ago
Just my impression on seeing videos of these tests on videos, which seem to result in the battery exploding violently and essentially escaping any attempt at confinement instead of catching fire. www.youtube.com/watch?v=W1ya_ls1zkA
FartsWithAnAccent@fedia.io 1 month ago
That's way less extreme than I would've expected.
TheObviousSolution@lemm.ee 1 month ago
What were you expecting? It’s literally an explosion. Add a few thousand of them in row in an EV battery.
August27th@lemmy.ca 1 month ago
Interesting. I wonder how that compares to a similar Li-ion cell. Also it’s a shame there wasn’t a close-up on the markings of the battery to know what it is exactly. I don’t imagine all cells are equal.
The battery packs from the article, for instance, are not constructed from cylindrical cells, but from large thin and flat square cells. The cathode material appears to be unique as well, as far as I can tell; who knows what’s in those blue cylindrical cells.
TheObviousSolution@lemm.ee 1 month ago
You can look at other videos in his channel that answer your doubts. 18650 battery cells are usually connected together into battery packs and BMS, and the industrial process is pretty standardized. Just like Li-ion you can have different cell structures, but the inside remains the same.