saptzae:
So far, there is no hint on availability of any per cell recordings. Sensibly,
the BMS would record (amongst others) things like
Event time stamp
Cell #
Cell voltage
Cell short/over voltage/under-voltage
Charger on/off
Failure notification
Breaker tripped / disconnected
Battery temperature/fire
Very much so. Something that's been bothering me for some time is the almost
obsessive concentration in the reports about the batteries, but still not a word
about the data logs for the battery subsystems. If all the above data is
being recorded, there should be a complete timeline of the events that led up
to the failure.
If they have the above, they have the reason already, unless such data is not
actually being recorded...