LiPO Batteries "swelling" - RCCanada - Canada Radio Controlled Hobby Forum
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Old 05-24-2013, 09:31 AM   #1
Jim D
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LiPO Batteries "swelling"

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I have 2 LiPo batteries, 3 cell 11.1 volts
The batteries are" swelled " under normal room temperature . The "swelling" increases when the outside air temperature increases
I assume this is gas expanding which is trapped within the cell wrapping
If I place the batteries in the refrigerator the packs return to normal shape.
They charge normally and maintain charge as normal
Is it a good decision to continue using and charging these batteries , or is it time to "retire " them
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Old 05-24-2013, 10:24 AM   #2
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Re: LiPO Batteries "swelling"

its always better be safe than sorry, replacing your lipos might save it from destroying your hundreds of $ rig
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Old 05-24-2013, 11:40 AM   #3
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Re: LiPO Batteries "swelling"

I believe we need a bit more information on what "Normal" is to you. In the short term, I would be very cautious of how you store these two batteries.

From my limited experience (3 years of messin' with Lipos) one of the issues that gets a lipo to start to swell is drawing down the voltage below ~3.5V/cell. The second issue is how they are charged (xC rating, balance charged, quick charge).

From the start I have run a log for each of my batteries, sounds silly, but I have only had one battery that didn't meet what I thought would be a reasonable "cycles to failure". When it decided it didn't want to take a charge, it didn't take more than a few minutes to find where I tortured it! (Ex Son-in-law ran it waaaaaay down)

Like the second poster here said about the saving the plane, don't forget about your house or garage.......
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