No really. With all the expense and distraction of complex BMS systems, I found myself wondering.
Are lithium batteries really so frail that their life would be radically cut if they were simply operated without a BMS, using limited charging
voltage and amperage? Plus, perhaps, a low voltage cut-off (like the cheap Battery
Buddy/Brain) to ensure they weren't pulled down below their lower limit?
Or, is the only really critical purpose of the BMS really to prevent a thermal incident? If a cell fails and shorts out, in theory it could overheat and start a thermal incident. But that could be prevented by a simple thermal sensor, no need for complicated electronics
to prevent that.
So...is the BMS really just a horribly complex way to get the last 10 or 20% of the battery's useful life out of it? Or really, just to prevent runaways, which could be managed as simple thermal management? (Cutting power when something overheats, something like the battery
post or top, not just the cables