Hybrid Car – More Fun with Less Gas

Reconditioning batteries - Page 4

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Posted by Ron Rosenfeld on July 6, 2008, 2:18 am

I use one of those thermometers that you "aim" at the target.  Some have a
built-in laser for aiming.  So I'm really reading the outside of the case
and not the electrolyte itself.

Absent a mfg recommendation, I'm recommending 110F because Surrette, which
used to recommend 125F is now recommending 115F.

Posted by Piccolo Pete on July 6, 2008, 3:39 am

Yeah, those laser thermometers are pretty neat.  I gotta get one of them
some day.

Posted by Ulysses on July 6, 2008, 11:00 pm

Sounds like a good thing to have.  I don't think my battery manufacturer
even gave me temperature specs.  I guess you get what you pay for.

I'm using OutBack inverters with RTS (remote temperature sensor) so I've
never felt any need to take my batteries' temperature.  It automatically
adjusts the voltage up to about 1.4 volts either which-way according to the
temperature.  I don't know what it will do if they ever actually get too
hot.  Now I have to go find out....

Posted by Ron Rosenfeld on July 7, 2008, 1:46 am

My understanding is that if they get warm, but within spec, water
consumption goes up.  If they get too hot, the plates warp.

I've only seen mine get over 110F on rare occasions -- and it was during
equalizations without using the battery temperature sensor -- but I was
monitoring things pretty closely.

Posted by Vaughn Simon on July 7, 2008, 12:36 am

   I use a thermocouple that plugs into my DVM.  I usually just tape the
thermocouple to the side of battery, so the above limitation applies.


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