Re: By Golly, Ollie...

["Art Gale" <gale@candw.ky>]

Wouldn't it be easy to run small gauge wiring to each battery .. with diodes
and LEDs.. (limiting resistors right at battery for safety) so you could
easily see a reverse voltage?
----- Original Message -----
From: "Jon "Sheer" Pullen" <sheer@sheer.org>
To: <ev@listproc.sjsu.edu>
Sent: Tuesday, February 27, 2001 10:49 PM
Subject: Re: By Golly, Ollie...


> <grins> This is why I'm making my battery monitoring system capable of
> sampling all the cells once a second.
>
> Getting closer, by the way.. pretty sure I'll have all the bugs ironed out
> of the hardware by the time I have batteries to monitor. ;-)
>
> S.
>
> ----- Original Message -----
> From: "Michael Bearden" <techsan@pacbell.net>
> To: <ev@listproc.sjsu.edu>
> Sent: Tuesday, February 27, 2001 6:18 PM
> Subject: By Golly, Ollie...
>
>
> > By golly, I think I found my problem...I ran wires from the front and
> > the back of the car into the passenger area, and went through my 24
> > batteries one by one with the following test: I would record the resting
> > voltage of the battery being tested.  Then,  Watching a digital
> > voltmeter, I accelerated in 2nd gear down my driveway until I had to let
> > off and slam on the brakes to keep from romping into the highway.  Even
> > with the voltage sag that I am seeing, WATTABMR still has pretty good
> > acceleration!  I would see a 700-800amp surge on the ammeter, with the
> > voltmeter clutched in my hand on top of the steering wheel.  then I
> > would reverse and run at about 100 amps back up the driveway, recording
> > the lowest voltages that I saw.  4 of my batteries went negative on the
> > meter under the hard acceleration. one other dropped into the 4 volt
> > range (8 volt AGM battteries).  I think now, Ollie, I know which
> > batteries to replace...
> > the neighbors have got to seriously wonder what was going on with
> > me...screaming down the drive spinning gravel, then zipping back smartly
> > in reverse, opening either the hood or the trunk, fiddling areound, and
> > then doing it again...24 times...    I got pretty good at staying out of
> > the ditch in reverse watching the mirror and the meter.
> > Michael b,.
> >
>