B
Bughunter
- Jan 1, 1970
- 0
'Captain' Kirk DeHaan said:I was thinking a bit differently but I see the point here. Fusing
between the series pairs would drop those batteries out if the fuse
popped. Is this correct?
Yes, if fuse 1 popped, String A would be disconnected from String B and the
load.
String B would still be supplying 12v to the load, same current, but at half
storage capacity.
Current flow would also stop in string A, even with a internal battery short
in that string.
If so this is the simplest method. But
again what value fuse to use? But if the battery, in the series pair,
before the fuse was to short will the fuse still pop? Isn't the
current being converted to heat in that battery instead of passing
through the fuse? Been too long since I've had to use any electronics
theory.
There still has to be a complete circuit for current to flow in any series
string. The fuse is in series with that circuit, so it would see any
increased current flow and pop as long as it was of the correct rating.
My thought was fusing the parallel connections. In this case the
fuses would see different current loads but would still leave the
series pair vulnerable.
I thought that my diagram WAS fusing the parallel connection between series
strings. Parallel goes from left to right, and series goes from bottom to
top in my drawing.
I can't see how it matters whether it's in a series of a parallel leg, but
most discussion talks about putting it in the parallel leg, which I believe
I have done in my drawing.
I'm running 8 L16's in series parallel so the current through the fuse
closet to the load connection could be quite a lot. I've already got
a 400 amp T fuse for the total load but that doesn't protect the
batteries in a situation like mine.
That fuse would be to protect the wiring between the load and the battery
and the battery bank as a whole. But, it does nothing to protect individual
strings.
I have to admit to being a bit rusty on theory myself. There has to be some
trick in understanding this, and I think that is an understanding of
internal battery resistance.
Somebody out there has to have done this before. I'm hoping they will pop in
and set us straight.