>>1876958I don't think it is related to circuits at all, but rather mechanical damage, like metal frame making contact with cells as PVC shrinkwrap isn't enough. 36V battery can be used as welder (in some cases), so no wonder it burns throug cells (they are thin stainless cans after all, not that hard to blow a hole through), causes shit to burn, which causes other cells to pop.
Because, as I said, it is hard to find a battery without BMS. Sure BMS can be this (I'd really want somebody explain to me how overcurrent protection works on this BMS, because I don't see shit, not even a fuse), but even then they turn off battery in case cells are out of safe values. Most of the times, because they are shit.
If BMS is based around IC of sort - better. If it has balancing - even better.
Then cells themselves have protection, like pressure switch and fuse. You can see pajeets resetting that fuse with random junk like a screw or nail if you search "18650 repair" on youtube and such.
So yeah, I have no fucking idea why batteries do catch fire, because I couldn't do that.
