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Old 01-22-2007, 02:52 AM   #1
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Default Ideal Battery Charging Tempratures??

One reads much about batteries and charging, but is there an optimum temprature to charge batteries at? In that it all has to do with the interaction of chemical compounds which react do produce voltage in a battery there must surely be an ideal temprature at which these reactions occur best and produce the best results without damaging the battery.
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Old 01-22-2007, 07:15 AM   #2
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The cooler the better I would say 120 degrees. I would check with the closest battery mad man at the local track. It depends on the battery.
And the method of chargeing, that you use.
I just charge mine till they vent and then never get'm that hot again.
There was a great article in Extreme R/C magazine on that very subject.
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Old 01-22-2007, 02:12 PM   #3
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What I am referring to is that "sweetspot" temperature at which a battery accepts charge best. Does it exist? We know that a freshly charged hot battery performs better than one that has stood and cooled. Muchmore make battery warmers, why? If there is such a "sweetspot" then one could build a thermostatically controlled device to maintain that temprature while charging. This should then result in peak performance from the battery with no heat damage! Has anyone done this type of testing and what were the results.
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Old 01-22-2007, 07:57 PM   #4
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Its very hard to say which is the sweet spot.

Ambient Temperature changes everytime. Set your charger at about 120 F.

I use the temperature as a safety parameter, so that I won't cook my cells. You should set your charger peak detection voltage to about 0.3v per cell if you're using IBs and the temp is just like what I've mention a precautionary parameter.
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Old 01-22-2007, 09:44 PM   #5
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Default Hmmmmm

My understanding was that the sharp rise in temp is the result of the battery being "full" and so any additional charging is turned into heat. Peak detection allows unattended charging but if you were to monitor temp carefully you could pull the battery off the charger at the ideal time, by watching temp alone.
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Old 01-22-2007, 10:29 PM   #6
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I think your asking to much here, The IB cells do seem to perform better when they are warm, but I dont think trying to warm them externaly will work. They have to be warmed internaly, and the only way to do that (as far as I know) is by charging them or repeaking them if they sit to long after the charge. Warming them externally may help a little, but probably not enough so that you could tell. And to my nollage, the cells always take a better charge when they start out cool and then warm up internally. But hey, if you find any thing that works let me know, I'll try anything that works. AL
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