What Is Correct Voltage For Storing Lipo Packs? - RC Groups
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Jun 30, 2011, 08:44 AM
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What Is Correct Voltage For Storing Lipo Packs?


What would be the correct voltage to attain when storing 3S 11.1V 3200mAh Lipo packs? What formula is used to determine storage Lipo pack voltages?

Thank you.
Last edited by itsme2; Jun 30, 2011 at 09:00 AM.
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Jun 30, 2011, 10:47 AM
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Mark Wood's Avatar
Storage voltage is what you would get them from the store and what they leave the factory at: 3.7v-3.8v per cell or 11.1v-11.4v total for the 3S pack.

mw
Jun 30, 2011, 10:59 AM
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Battlepack's Avatar
About 70% charge capacity is normal for LiPoly and LiFePO4 (A123/K2)
Jun 30, 2011, 11:05 AM
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DonA's Avatar
General rule of thumb for lipo storage is to have each cell at approx 3.85 volts per cell and store them in a cool dry location. I keep mine in the refrigerator in zip-lock type bags.

If you do a search here in this forum you will find many threads discussing lipo storage.

Don
Jun 30, 2011, 08:55 PM
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lipoflyer's Avatar
Quote:
Originally Posted by DonA
General rule of thumb for lipo storage is to have each cell at approx 3.85 volts per cell and store them in a cool dry location. I keep mine in the refrigerator in zip-lock type bags.

If you do a search here in this forum you will find many threads discussing lipo storage.

Don
Do you keep them in a "lipo-sack" whilst in the fridge.
Jul 01, 2011, 09:24 AM
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DonA's Avatar
No, I just use the zip lock bags. The zip lock bags help prevent condensation on the lipos.

I considered using the lipo 'sacks' but thought condensation would accumulate on the inside of the 'sack'.

Don
Jul 01, 2011, 11:56 AM
Registered User
Putting a room temperature anything into a ziplock bag and putting in the fridge is trapping the moisture in the bag with the battery.

You want to protect from condensation when you remove the battery from the cold fridge to the atmosphere, not protect from condensation while in the fridge.

Sounds by your statement that you are putting battery in ziplock, then putting in the fridge. That wouldn't be helping anything.
May 21, 2012, 01:13 AM
3D VFX Artist
tonyastro's Avatar
How about storing in the fridge in a hard plastic container? Will it keep moisture out when I take it out of the fridge and leave it inside the container for an hour?
May 21, 2012, 07:31 AM
PEMAC
SleepySean's Avatar
Air contains moisture, so ideally you want something you can squeeze all the air out of. Cling wrap?
May 21, 2012, 07:20 PM
3D VFX Artist
tonyastro's Avatar
I think I'll stick with room temperature storage. All this trouble is not worth a few bucks for a lipo
Jul 30, 2012, 02:36 PM
Champagne Supernova
Remote_Pilot's Avatar
Quote:
Originally Posted by mrodgers
Putting a room temperature anything into a ziplock bag and putting in the fridge is trapping the moisture in the bag with the battery.

You want to protect from condensation when you remove the battery from the cold fridge to the atmosphere, not protect from condensation while in the fridge.

Sounds by your statement that you are putting battery in ziplock, then putting in the fridge. That wouldn't be helping anything.
So whats the correct method
Jul 30, 2012, 06:04 PM
Space Coast USA
hoppy's Avatar
The amount of moisture in the bag will be the same whether you put it in the fridge or not. Do it after you take it out and the moisture in the bag will condense on the battery. Put it in before placing it in the fridge will cause the moisture in the bag to condense on the bags surface. Which do you think is better? The bag prevents the room air from continually providing fresh water laden air to the surface. The moisture in the bag will is a constant.

Either way is OK
Jul 30, 2012, 07:14 PM
Champagne Supernova
Remote_Pilot's Avatar
Quote:
Originally Posted by hoppy
The amount of moisture in the bag will be the same whether you put it in the fridge or not. Do it after you take it out and the moisture in the bag will condense on the battery. Put it in before placing it in the fridge will cause the moisture in the bag to condense on the bags surface. Which do you think is better? The bag prevents the room air from continually providing fresh water laden air to the surface. The moisture in the bag will is a constant.

Either way is OK
haa haa ok. Too scientific. I just put them in a ziplock, sealed it up and put em in the frig at 3.75-3.8v. 32-35 deg. F.

Im going to take out what I will need for the weekend on Wed and Thurs to come up to room temp and charge Thurs and Fri.

Wish I would have done this a long time ago. I have a bunch of lipos. You know this heat is killing them. Cool is good.
Jul 30, 2012, 08:18 PM
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RPatrick's Avatar
Quote:
Originally Posted by SleepySean
Air contains moisture, so ideally you want something you can squeeze all the air out of. Cling wrap?
Seems like unlubricated Trojans would do the trick !
Jul 31, 2012, 09:23 PM
oTc
oTc
Registered User
Quote:
Originally Posted by RPatrick
Seems like unlubricated Trojans would do the trick !
Yea...I can see were that would go..Wife asks, "Honey why do you have a large box of condoms?"


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