Quote:
Originally Posted by leandroprz
Hi all.
I built the dew heater linked on the first post on this thread, but I have a question regarding the 12v battery. I'm using this connected directly to a Li-Ion battery, could that damage the battery?
Thank you
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Yes, it can damage the battery if you
over discharge it.
Lithium batteries are very fussy about voltage. Like many things, too high or too low causes problems. But with Lithiums this is even more important.
As far as the upper limit goes, I'm going to assume(hope) you are using the correct charger for the chemistry.
It may be worthwhile checking with the manufacturer for the lower voltage limit, if you can't find that information then a minimum discharged voltage, under load, of around 2.7 to 2.9v per cell.
For you though, with such a low discharge current the cells will probably fall over at an even higher voltage, so shoot for a conservative minimum somewhere between 3 to 3.5v, this will also extend the cycle life of the battery.
If it is an 11.1v battery(3 cells) then don't go any lower than 8.1v.
For a 14.4v battery(4 cells) don't go any lower than 10.8v.
Also, when not using the battery for extended periods (months) do not store it fully charged. 40-50% charge is ideal for storage.
