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Discussion Starter #1
(Apologies in advance: this message may appear twice on the list - sending
from the EVDL.org archive web interface as a test...)

Hi all -

Thanks to the generosity of a fellow EV driver, Project ForkenSwift is no
longer driving on worn out, grossly mismatched, bulging, leaking, 6v floor
sweeper floodies (!) that the local forklift company was supplying us for
free to get the car running.

Instead, this summer we received a collection of used 3 & 4 year old Exide
floodies out of a Ford Ranger EV ( http://www.austinev.org/evalbum/600 ) and
a VW Jetta EV.

My question revolves around the fact that we were given *twenty* batteries,
but it's a 48v car. (And the donor wouldn't even let us pay for them - not
even the equivalent refund he would have gotten from the recycler! Nice
guy!)

Considering the "beer budget-ness" of Project ForkenSwift, we'd like to
stretch the usefulness of these batts to the max. Up to now, we've just
been running what we were told were the "best" 8 batts in the (48v) car, and
the rest have been sitting in a shed (charged once in July, but not
maintained since that last charge).

Should we be rotating all 20 batteries through the pack? One at a time?
Should we assign batts to 2 packs and swap packs all at once? How often?
What would you do to make the most of this embarrassment of riches? (OK,
embarrassment of lead.) Any advice is welcome.

thanks-
Darin

Project ForkenSwift
http://www.evalbum.com/1146
http://forkenswift.com
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Discussion Starter #3
David Nelson-5 wrote:
>
> What if you tested each battery out and then "ability" grouped them
> into matched or nearly matched sets? That way you wouldn't cause a
> couple of weak batteries to kill the better ones.

That makes sense. Time to get out the homebrew load tester again.

If the 2-pack approach is best, I wonder about the ideal frequency for
switching between packs - ie. would it be better to wear out one pack, while
keeping the other on "standby", charged & cool? Or swap them back and forth
on some schedule?

I'm already guilty of neglecting the batteries sitting in the shed - going
to put them on the charger and get them topped up again today.
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