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Re: (ET) charging
I just received a Soneil 36v charger
will let folks know how it does
--- Christopher Zach <czach computer org> wrote:
> > My battery cables are kind of funky, they are
> autopart store clamps
> > where the wire is clamped by a flat plate. The PO
> had a good idea using
> > the screw top posts, the clamp is put on the post
> and tightened and then
> > a nut and washer are put on the top screw portion
> of the battery post
> > and tightened down forcing the clamp onto the
> taper of the post.
>
> Bad. The problem with this is that the lead will
> deform around the post,
> and the battery wire will work it's way loose=loose
> connection=problem.
> As it loosens, the post gets hot, which makes the
> problem worse.
>
> People on the EV list strongly recommend against
> using the top post for
> anything other than sensor wires.
>
> A way to verify this is to drive around and see if
> any of the posts are
> warm. Warm equals resistance and so forth.
>
> The standard around the post clamps are the best way
> to go. Get a bunch
> at the local auto parts store, clip off those ends
> you have, and do it
> right.
>
> Chris
>
>
> I
> > really should get made up battery cables but that
> would be one more
> > expense on top of my planned purchase of the
> Alltrax controller. I'm
> > looking forward to removing all the wiring out of
> my tractor, all the
> > mods by the PO and having it be relatively simple.
> >
> > The spirit is willing but the wallet is weak :-)
> >
> > Jeff Tickner
> > Technical Support
> > 800-545-9485, Ext 536
> > SoftLanding Systems
> >
> >
> > *Christopher Zach <czach computer org>*
> > Sent by: elec-trak-bounces cosmos phy tufts edu
> >
> > 07/12/2004 09:21 AM
> >
> >
> > To
> > Jeff Tickner <JeffT softlanding com>
> > cc
> > elec-trak cosmos phy tufts edu
> > Subject
> > Re: (ET) charging
> >
> >
> >
> >
> >
> >
> >
> >
> > Sounds like your batteries are pretty good,
> however your problem might
> > be in either the battery clamps, the wires, or
> your main disconnect.
> > I've noticed that there is a *serious* voltage
> drop on my tractor's
> > wires, life is like that.
> >
> > For my part, my meter drops under load, but my
> battery monitors don't
> > show a problem. Monitors don't lie.
> >
> > One way to find loose clamps is to drive the
> tractor around at full
> > power for awhile, then stop, pop the hood or seat
> and touch each post
> > with your hand. You'll feel warm (=loose) ones
> quickly.
> >
> > Chris
> >
> > Jeff Tickner wrote:
> > >
> > > In preparation for pulling my E15 apart for R&R
> I decided to put a
> > > really good equalization charge on my pack so I
> ran the charger
> > > overnight. I reached a max voltage of 43.4 and
> all battery cells were
> > > bubbling. After I unhooked the charger and let
> the pack sit a half hour
> > > the voltage dropped to 39.5, all the batteries
> were within .1 volt of
> > > one another.
> > >
> > > Still I think I have a bad cell since after I
> buttoned it up and drove
> > > it to the shed the "gas gauge" dropped a good
> bit from driving 150
> > > yards. I didn't have time to check battery
> voltage at that time, but is
> > > that the best way to find a bad cell, run the
> batteries down some and
> > > see which battery has discharged the most?
> > >
> > > PS I have one of those "Solargizers" that I
> purchased because the shed
> > > were the tractor is normally parked doesn't
> have power. While I was
> > > cleaning connections yesterday I tested output
> unconnected to the pack
> > > and it was 60+V in full sun. The meter I was
> using (actually a dwell
> > > meter) doesn't have milliamps so I couldn't
> check output but it's very
> > > small.
> > >
> > > Jeff Tickner
> > > Technical Support
> > > 800-545-9485, Ext 536
> > > SoftLanding Systems
> > >
> > >
> > > *neil <wombat dssinternet net>*
> > > Sent by: elec-trak-bounces cosmos phy tufts edu
> > >
> > > 07/09/2004 05:11 PM
> > >
> > >
> > > To
> > > elec-trak cosmos phy tufts edu
> > > cc
> > >
> > > Subject
> > > (ET) charging
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > You're right, that is way too low, I did a
> fatfinger, Should have been
> > > 14.7 or more. I usually use a value of 2.7
> volts per cell as the max.
> > > The auto charging systems I worked with were
> set to 14.4 volts nominal
> > > at under hood temps.
> > >
> > >
> > > _______________________________________________
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> > > Elec-trak cosmos phy tufts edu
> > >
>
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
> > >
> > >
> > >
>
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