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HomeAircraftHelicopterMain Discussion › Puffy Lipo Life
11-05-2013 05:04 AM  4 years agoPost 1
PPBAL

rrApprentice

ca

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I have 2 - 4000mah 22.2 V lipos that are puffy. I wonder how long will it last? Is it dangerous to continue flying until it expires? What are the consequences if you have any experience on this situation.I am using these on my trex 550e V2 Fbl. I greatly appreciate your replies and thanks for your time.

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11-05-2013 07:18 AM  4 years agoPost 2
Shortman

rrKey Veteran

Portland, Oregon

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What kind of charger do you have and can you post pictures? Sometimes packs puff when they get old, but it doesn't necessarily mean they are no good, the best method for checking is to check the balance, capacity and if you can depending on your charger, the IR of each cell to see if maybe you have a bad cell.

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11-05-2013 09:31 AM  4 years agoPost 3
Jeff polisena

rrElite Veteran

westpalmbeachflorida usa

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If they puff don't charge without watching . You could charge and fly 1000 cycles or 1 cycle before the chance of fire . I'm speaking from someone that lost their house because of lipo fire . Always treat as they are going to catch fire just to be safe .

I stole it ,flew it and gave it back ;)

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11-05-2013 09:34 AM  4 years agoPost 4
honda411

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Surprise, AZ USA

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Jeff, just curious. Does your home owners pay for that, or what happened for as in who covered the damage?

HeliDirect Field Rep, Synergy N7 w/ OS 105, Torq Servos, Cyclone/ Rail blades

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11-05-2013 09:42 AM  4 years agoPost 5
Jeff polisena

rrElite Veteran

westpalmbeachflorida usa

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Homeowners but believe it doesent matter . Almost lost family did loose my dog and everything that didn't burn was still a mess . Of course liability proof is a psi in the butt ,no one wants to pay .

I stole it ,flew it and gave it back ;)

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11-05-2013 10:11 AM  4 years agoPost 6
honda411

rrKey Veteran

Surprise, AZ USA

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oh my gosh. sorry to hear about all of that.

I couldnt imagine the pain from it. Hope that never happens

HeliDirect Field Rep, Synergy N7 w/ OS 105, Torq Servos, Cyclone/ Rail blades

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11-05-2013 10:17 AM  4 years agoPost 7
shawmcky

rrElite Veteran

Isle of Wight,United Kingdom

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Charge my lipos in an old stainless steel sauce pan complete with glass lid in my shed.Terrible thing to lose so much in a fire!

Team- unbiased opinion.K.I.S.S principle upheld here

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11-05-2013 02:08 PM  4 years agoPost 8
Stephen Born

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USA

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Distended LiPo's can still be charged and flown. However, there is a greater risk of combustion or loosing a cell while flying.

Great care should be taken when charging LiPo's, but even more so when swollen.

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11-05-2013 08:45 PM  4 years agoPost 9
Bouchah

rrKey Veteran

Willow Spring, N. Carolina USA

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I bought 4 6s 5000 mAh packs used that are puffed. They flew and charge fine til I charged one with my PL8, it detected a dead cell. I checked the voltage in the pack and sure enough it had a dead cell. Still plan to use the other three packs but will definitely use caution with them.

Blade 130x (5)
Trex 550 V2 (18)
Shuttle ZXX
Freya Xspec (20)

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11-05-2013 09:57 PM  4 years agoPost 10
Luvmyhelis

rrApprentice

Spokane, Washington. USA

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Shoot, I have been flying with a puffy 12s pack in one of my 600s all summer long and all last year. As soon as it cools, back to normal. The internals look good. For some reason my friends 6HV puffs every pack it flies and he gives them away. I just make sure that pack doesn't see any hard 3d and it seems fine. I also balance charge at very low rates.

Old cranky heli builder

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11-06-2013 02:42 AM  4 years agoPost 11
BENTDABOOM

rrKey Veteran

west seattle

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just don't try and let the air out! knew this guy that didn't like the puff so they poked a hole in the coveringI guess pieces of fire shot all over the room and burned holes in the floor geeeeeeez

CAUTION!!! politicians may be hazerdous to your well being

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11-06-2013 03:01 AM  4 years agoPost 12
mr dan

rrVeteran

Stockton Calif

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This is a classic example of what not to do with a puffed lipo . If its puffed, its bad and thats it .. Its on its way out and should no way be flown nor charged any longer. When a lipo bursts, its because of mis-use or a result of a very hard impact that punctured one or more cells. When a lipo catches fire during a charge, it is due to one or more bad cells etc, charging at a rate the lipo cannot handle , they just dont blow up.

"R.I.P Roman" Citizen 0094 in the Nation

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11-06-2013 04:06 AM  4 years agoPost 13
Dr.Ben

rrMaster

Richmond, VA, USA

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Puffed and swelled a bit are two different things. The latter tends to ease a bit when pack temp goes back to ambient after a flight. I have two sets of packs that have been fine for at least 100 cycles AFTER they swelled. IR tells you what is going one inside the cells. Use it to help guide you when a pack is truly ready for the bin.

Ben Minor

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11-06-2013 11:30 AM  4 years agoPost 14
Retired2011

rrElite Veteran

Lee's Summit, MO

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I have 3 - 6S packs I got with a used heli early this spring. They were at least a couple of years old and already puffed or swollen (whatever) when I got them...flew them all summer, and still going strong.
I'm certainly not replacing them because of a little swelling.

Chet

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11-06-2013 11:51 AM  4 years agoPost 15
unclejane

rrElite Veteran

santa fe, NM, USA

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I tend to be more conservative about puffing; I take them out of the rotation immediately and for good if I observe any puffing.

No reason I can come up with to put any extra risk on top of the already existing risks, especially with large batts. But even the small ones are often attached to stuff that cost me a lot of $ so I abandon those also.

Using cheap LiPos helps me make that decision - a cheap one that's puffed is a lot less tempting for me to continue to use than one I have a larger investment in. That's a "human factors" thing (an idea that carries over from full-scale) that I do for myself to help avoid making a bad decision that could be dangerous.

Despite that I've had pretty decent luck with this and have only had a few packs actually puff up on me. I don't abuse mine so they tend to have a long, cushy life. Until I drill them into the ground or do something stupid to them that is
But when they puff, they go instantly to the bin.

LS

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