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Puffed up LiPo

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Old 05-26-2014, 04:42 AM
  #1
enggricha
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Default Puffed up LiPo

Probably this question has been asked here before, but I couldnt find it. One of my LiPos puffs up a little bit when charging but then becomes normal when used and discharging. I am sure its not the charger, because I am using the same charger with another LiPo.

The LiPo in question is a new one and has been used only 4 times. Is it safe to use this, and if so do i have to do any thing to get to be normal?
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Old 05-26-2014, 09:28 AM
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I'm no expert, but puffed lipos scare me as that indicates that something has gone wrong in way to damage the structure of the battery (could even have been a manufacturing defect). I know some guys can get over-zealous with lipo safety, and I definitely do NOT consider myself to be in that category, but I do treat them with respect.

My inclination would be to dispose of it, but if you do continue to use it, I would make sure to both charge and store it outdoors in a fire-safe container.
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Old 05-26-2014, 03:06 PM
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Puffed up a "little" covers a lot of ground!
If the Lipo is a small inexpensive one, I'd likely dispose of it, rather than risk an expensive model.
On the other hand, some of the "cheap" small lipos seem to be prone to doing this, and while it's an indication
of possible problems, seem to continue to function. Perhaps not as well or long, but adequately.
It's the old risk/reward bit.
I and others have used "lightly" puffed lipos without problems. Most of the time, we get away with it.
Occasionally, the results may be spectacular!
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Old 05-28-2014, 06:28 AM
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Quote:
Originally Posted by chuckk2 View Post
Puffed up a "little" covers a lot of ground!
If the Lipo is a small inexpensive one, I'd likely dispose of it, rather than risk an expensive model.
On the other hand, some of the "cheap" small lipos seem to be prone to doing this, and while it's an indication
of possible problems, seem to continue to function. Perhaps not as well or long, but adequately.
It's the old risk/reward bit.
I and others have used "lightly" puffed lipos without problems. Most of the time, we get away with it.
Occasionally, the results may be spectacular!
Thanks for that i guess mine would also be in the "lightly" puffed category...will continue to use it with caution.
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Old 05-28-2014, 04:16 PM
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I wouldn't use any Lipo that shows any signs that it's damaged or not especially if it's a puffed up Lipo it means something has gone wrong with the chemicals inside and worst can occur if it isn't treated the right way which the only right way for me would be to dispose it and just suck it up and purchase a new Lipo. You don't want to lose a $1000 item for a $50 Lipo or even less. No insurance these days on Rc cars .
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Old 05-28-2014, 04:29 PM
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Need more info.
What brand lipo, how may cells, and what milliamp rating ?
What brand and model charger are you using?
What "C: rating are you charging at or what amperage setting are you using?
A lipo that swells when charged typically means it's being charged too quickly with too high a "C" rating or amperage. .
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Old 06-14-2014, 01:41 PM
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Got a few puffy ones myself. How are you guys disposing of them? Also, how are you supposed to legally dispose of them?

David
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Old 06-14-2014, 01:59 PM
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David you need to fully discharge them there are a number of ways to do so. Search online for ways to discharge a Lipo fully. Some people wire a bulb others just leave it plugged into an old esc. Once a Lipo it's fully discharged all the chemicals inside will be safe to dispose in the garbage can
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Old 06-15-2014, 07:12 AM
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Thanks Re. Will do it that way.

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