Re: Charging telemetry data--take 1 (previous experience with old AGMs)

[jerry dycus <jerry5335@yahoo.com>]

      Hi Joe, Chris and All,
         Thanks for the great info!!
        AGM's survive sitting around a lot better than
most people think.
  
--- Joe Smalley <joes@worldfront.com> wrote:
> I would not write off the batteries until you test
> them individually.
> 
> I have three sets of "old AGM batteries" that are
> takeouts from other
> people's cars.
> 
> First example:
> 
> Eight Dynasty UPS12-475 (date code HKB14640659) drag
> raced by Rich Rudman in
> '97. He believes they were new in '96. I drag raced
> them in '98. We both
> changed to Optimas and the batteries sat in the
> garage. They got charged
> about every 18 months until this month. I pulled
> them out and did a pair of
> equalize cycles on them and did a 25 amp Reserve
> Capacity test on them.
> 
> According to the Dynasty website, the original
> capacity was 23.4 amps for 5
> hours for a capacity of 117 Ahr.
> 
> Results:
> 2 above 110 Ahr.
> 4 between 100 and 110 Ahr.
> 1 at 89 Ahr (second pair of equalization cycles
> brought it up to 112 Ahr)
> 1 at 28 Ahr (second pair of equalization cycles in
> progress but improved to
> 48 Ahr on first of the second pair)
> 
> If you are in a hurry and don't want to test them,
> give the batteries to
> someone who has the time to test them but cannot
> afford to buy a new pack.
> They will learn something and you might get another
> EV on the road that
> might not do it without your generosity.
> 
> Joe Smalley
> 
> 
> 
> ----- Original Message -----
> From: "Christopher Zach" <czach@computer.org>
      From this data you can see that cycling them
will revive them hopefully. Deep cycling strings of
them is not good until they are all back up to snuff.
      For replacement batts maybe get a batt the size
of 2 of yours for a single string, cutting cost,
hassle. 
      You could if they won't all come back up use
just a single string of the best of them if max range
isn't needed.
     Even if you need to make body mods for a less
costly but better battery choice would be worth it.
      You can give or sell the good ones left to other
EV'ers to keep, start their EV's going.  Most of my
batteries are used and work great.
    I'd love to get small EV batts for my e-bikes,
personal transport module. I get my ni-cads, AGM's
that way from batt companies that service big UPS
systems. Ni-cads are usually free!!! 
                 jerry dycus
> 
> > As for the date, I haven't dropped the pack yet.
> However I am willing to
> > guess that they are the ones that came with the
> car, and are thus 1994
> > vintage (ie: *old*).
> >
> > The verdict might just be that the pack is a
> hopeless little basket case.
> > Still, 30 miles of range is enough to meet the
> orig objectives (drive to
> > parent's house with the kids, 22 mile trip). I
> might just want to consider
> > this to be my "training pack" and concentrate on
> babying it as I learn to
> > drive an EV. Then in the fall I can drop the pack
> and replace it with a
> > shiny new something (with knowledge about what
> makes a "good" pack and how
> > to drive it).
> >
> > Any other comments are totally welcome and
> appreciated.
> > Chris
> 


__________________________________________________
Do You Yahoo!?
Yahoo! - Official partner of 2002 FIFA World Cup
http://fifaworldcup.yahoo.com