ELEKTRONIKA > BATERIJE i PUNJAČI

lipo na -10c?

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magic:

--- Quote from: englez on December 20, 2009, 04:24:08 PM ---The charge voltage of a lithium cell goes down with temperature. At room temperature the charge voltage is 4.2V, @ near freezing it is about 4.1V. If you charge at room temperature fully and then take the pack on a winter’s day to the flying field (or store it) and its temperature gets down to 10degC or less it will may "puff" because it will be
overcharged at this temperature! Better to charge to 80% (4.1v/cell) or run the battery down a bit on a cold day or putting in storage.
You should never either fully charge one in the warm and then take it out in the cold, or charge it fully in the cold.

Izvini, vi znate moj Srpski jezik je los   :sljus

--- End quote ---

Sorry, but I have to disagree on this one. The V drops as the temperature goes down. The batteries will puff because if you do not reduce your flying time by at least 30% you will discharge them below 2,7V/cell. Get a cell logger, really a mighty tool. As you can see, my English is quite good, I got my A levels  ;).

Strana 8 ce vam sve objasniti. http://www.der-schweighofer.at/public/files/22901.pdf

U svakom slucaju, baterije treba drzati pre upotrebe na temperaturi sto blizoj 45C kada je napolju hladno.

Provereno u praksi od strane F5B pilota, a njima je svaki mW bitan :).

poz

POSEIDON:
Mislim da u ovom postu nije dat direktan odgovor,ja sam još na početku bavljenja ovim hobijem...pa stvarno ne znam odgovor,ali i mene zanima kako se sve ponaša na ovakvim niskim temperaturama  4e  ()-()

modelar:
Nisam bas siguran kako je u teoriji, ali ovako je u praksi :

http://www.workflow.as/jogrini/diary/jan09.htm   

Pozz

magic:
Nije mi jasno kako ti nije jasno?!  :)

Drzi baterije na toplom pre nego sto ih stavis u model i skrati vreme upotrebe za 30% od uobicajenog. Isto tako ocekuj dosta slabije performanse.

poz

englez:

--- Quote from: magic on December 20, 2009, 04:56:20 PM ---
--- Quote from: englez on December 20, 2009, 04:24:08 PM ---The charge voltage of a lithium cell goes down with temperature.

--- End quote ---

Sorry, but I have to disagree on this one. The V drops as the temperature goes down.

--- End quote ---

OK.   4e

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