RR_NDB:
Agreed and comes back to what I was saying about inadequate logging in
terms of the number of parameters stored. At a minimum, each cell's voltage,
cell temperature and charge / load current need to be logged to have enough
audit trail to trace back fault conditions to source.
From the info we have, it looks like the charger's led display provides the
equivalent of car's dashboard "idiot lights", which won't necessarily be
that helpfull to investigators.
FX: Message from Charger, "battery has failed". Fireman: Yes, thanks for that,
we just finished putting the fire out
I can see why they might only log a subset of the data, since logging all
at say once per second would take quite a bit of flash memory, but there
are ways round that:
Classify messages as to severity level: Informational, Warning and Critical
1) Informational messages re-use storage, deleting the least recent entries
2) Warning messages are saved until manually cleared, or out of storage,
then as per 1) above.
3) Critical switches to real time (1 entry per second ?) logging and saves all
parameters related to the fault.
The above is standard technique all over industry, so why not this charger ?...