Hi,
mm43,
Charger faults - Fan speed, CPU Temperature, Voltage, Current, Power, Stored fault history.
Battery faults - Abnormal temperature, Temperature sensor circuit, Cell unbalance sensor unit.
LED display - Eight-character alpha-numeric.
Diagnostics - Self test, Output voltage, Output current, Operating hours, Temperatures, Power.
Time - Date, Software revision.
Charge mode - Bulk charge mode, Topping charge mode, Trickle charge mode.
1) Per cell temp. seems was not considered necessary
2) As we can see Software is now playing a role in batteries.
There are THREE algorithms capable to stress this BAD BATTERY. Both JAL and ANA incidents could be related to this fact (use of patented algorithms)
But, how to verify? This can make impossible for NTSB answer (conclusively) WHY, the current effort.
As i mentioned before, we would need EACH CELL VOLTAGE HISTORY. The comments from JTSB and from IIRC NTSB on 32 V is ABSOLUTELY IRRELEVANT. Were certainly based in a quick look to FDR.
Questions:
1) Battery voltage (BEFORE relay contactor) is showed to crew? Is recorded in FDR?
2) Battery voltage (BEFORE diode module) is recorded?
IMO FDR config. for 787 should be a little bit different.