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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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> >  >
>
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
> >  >
> >  >
> >  >
>
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