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Old 09-21-2013, 03:03 PM   #1
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Default Is there a technique to correct a swelled/puffed lipo?

Guys,
I tried to search but didn't find anything other than to throw them away. But, has anyone found a way to un-puff a lipo? Like, maybe cycling a certain way, etc. Any assistance is appreciated.
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Old 09-21-2013, 03:08 PM   #2
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puffed is puffed, simple as that. If after a run it comes down any, great. But if not there's no magic charging method to do so. You can either decide to take your chances and continue to use the pack or "recycle" it to an unknowing eBay bidder..

once you puff, you never go back..
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Old 09-21-2013, 03:32 PM   #3
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Jkas

No promises

balance pack at low amp rate , less then 2 amp..
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Old 09-21-2013, 03:49 PM   #4
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^^^

that will NOT bring the puffing down like you asked. It would simply let you charge the pack without puffing it any further at best.
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Old 09-21-2013, 04:37 PM   #5
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Stab with a screwdriver













Then buy a new one.
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Old 09-21-2013, 04:45 PM   #6
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My revtechs deformed my case but I can squish it and it just feels like air so I assume they swell during the run when hot but the cells go back to normal and the case is stuck deformed
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Old 09-21-2013, 05:10 PM   #7
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Quote:
Originally Posted by XRated SCT View Post
My revtechs deformed my case but I can squish it and it just feels like air so I assume they swell during the run when hot but the cells go back to normal and the case is stuck deformed
The "air" is likely hydrogen trapped in the battery cells. You're playing with fire (a bad one), literally.
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Old 09-21-2013, 05:27 PM   #8
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ok....some battery cases can deform, be it from a puffed lipo that then went down on its own or from simple everyday heat exposure. If you squeeze the case and it's "hard", the cells are puffed. If you can squeeze the case and you can feel a gap before touching the cells inside, likely the case is warped and the cells are fine.

there's really little way to be sure without handling the pack in person..
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Old 09-21-2013, 05:34 PM   #9
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Quote:
Originally Posted by Davidka View Post
The "air" is likely hydrogen trapped in the battery cells. You're playing with fire (a bad one), literally.
So, the plastic "bag" the cell is wrapped in is sealed, and the puff is from an excess discharge of gas in the "bag"? Is that correct? Can a guy - carefully - relieve the excess gas with a pin hole or something and release the built up pressure?
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Old 09-21-2013, 05:35 PM   #10
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Quote:
Originally Posted by Mullet1 View Post
Stab with a screwdriver













Then buy a new one.
I know, right? LOL!
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Old 09-21-2013, 05:37 PM   #11
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From everything I've heard, on the net and IN PERSON, revetechs are some of the worst packs on the market for puffing.
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Old 09-21-2013, 05:48 PM   #12
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Quote:
Originally Posted by jkas10 View Post
So, the plastic "bag" the cell is wrapped in is sealed, and the puff is from an excess discharge of gas in the "bag"? Is that correct? Can a guy - carefully - relieve the excess gas with a pin hole or something and release the built up pressure?
It has been done before

No, it's not particularly safe
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Old 09-21-2013, 05:57 PM   #13
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Like Ridley said, you're correct, the puffing comes from the gas. And it's NOT safe to vent the cell or cells on a puffed lipo.
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Old 09-21-2013, 06:02 PM   #14
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Quote:
Originally Posted by racer1812 View Post
ok....some battery cases can deform, be it from a puffed lipo that then went down on its own or from simple everyday heat exposure. If you squeeze the case and it's "hard", the cells are puffed. If you can squeeze the case and you can feel a gap before touching the cells inside, likely the case is warped and the cells are fine.

there's really little way to be sure without handling the pack in person..
yea I can squeeze and feel the gap between the case and cells
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Old 09-21-2013, 06:06 PM   #15
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Quote:
Originally Posted by XRated SCT View Post
yea I can squeeze and feel the gap between the case and cells
Then, IMO, that's a case issue and not a puffed cell issue. Left up to you to make the call on what's hidden inside.

a warped case is not an uncommon issue, regardless of brand.
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