Re: By Golly, Ollie...

["Jon \"Sheer\" Pullen" <sheer@sheer.org>]

Yes.. but that'd take all the fun out of life. So instead I'm building a
system to measure each individual cell, accurate to 2 hundredths of a volt,
plus post tempurature, logged into a mysql database once a second all the
time the car has the ignition on or is plugged into power.

Good clean fun.

----- Original Message -----
From: "Art Gale" <gale@candw.ky>
To: <ev@listproc.sjsu.edu>
Sent: Wednesday, February 28, 2001 5:12 AM
Subject: Re: By Golly, Ollie...


> 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,.
> > >
> >
>