"Larry" wrote in message
...
(Mic) wrote in :
The only caveat to large banks of batteries is proper internal fusing.
If a cell shorts out in a battery, the battery voltage will drop
approximately 2 Volts. All batteries in the bank will start
discharging into the shorted battery, unless fuses take the bad
battery out of the circuit. Thus, battery banks need to be fused
internally as well as externally."
If a cell shorts out in a battery, the cell explodes boiling its
electrolyte into steam, damn near instantly, unless it's already dead.
The
other cells in SERIES with the dead cell have no current through it. The
other batteries may explode if not properly fused, even if the other good
cells in the blown battery oppose them, overcharging like mad in the
process. All batteries MUST BE FUSED!
Nobody sugggested that fusing isn;t necessary. Just that is does not
necessarily protect against a shorted cell. I had a cell short once and
all it did was lower the voltage of the battery and discharge the parallel
battery. No dramatic event, just dead batteries.
I like about 150% of the starter
current and the wiring must be able to handle that current level to blow
the fuse....not the crap house wiring I see on house batteries all the
time.
There's no way I know of to keep the shorted cell from exploding,
distributing its acid over everthing in every drawer in the boat....what a
mess.
--
Larry