Sorry. I guess I focused on the original point. Regarding the "related" issue; The fire risk defects won't show up like a "normal" weak cell imbalance issue, which can be detected before it gets too bad. The cars that have caught on fire have not shown sudden loss of capacity before the fire. If there was a connection between a cell imbalance issue and the fires, there would be at least some fires with this "tell".You kind of missed my point here.
Furthermore, all cells have imbalances. No two cells are exactly alike. The differences between a fire-prone cell and a normal imbalance would not be detectable with the hardware sensors installed in the Bolt, which are installed across cell groups of three, making it all the more impossible.
From a technical standpoint, the failure mode is completely different. Fire-prone cell failure would be caused by dendrites forming at the tear and bridging the folded separator area. This is a well-known type of failure that occurs suddenly with no warning whatsoever. There's some lab-level test methods for detection on individual cells, which don't work reliably, but that's it.