Fw: Battery Bussing [RE-wrenches]

[Allan Sindelar]

Re this part of my earlier post on battery interconnects:
> The point of diagonal tapping is to minimize
> the effect of cumulative interconnect and terminal resistance from causing
> one string to charge and discharge "sooner" than the others; you could
also
> say "more" or "less" than the other strings. The additional resistance is
> very slight with clean connections, but as the amperage can be very high,
> the resultant voltage drop from parallel string to parallel string can be
> significant. A consistent variation in voltage over time leads to
> incremental premature failure of some strings--and I admit I'm not sure if
> it's the harder-working strings or the less-cycled strings that would fail
> first.
Can anyone answer my question? How will an unevenly-matched battery bank
deteriorate? Which cells will fail first, and why?
Thank you...
Allan at Pos E

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