Re: (ET) charging

[Christopher Zach <czach computer org>]

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
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> Subject
>         (ET) charging
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> 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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