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› lipo disposal WARNING
06-04-2010 05:02 PM  7 years agoPost 1
str8den

Veteran

NE U.K

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i had a potentially close call today, please read because 'things' could have got damn messy, quickly!!

i have only disposed of one lipo pack before this one. i previously took the advice of dismantling the batt., then puncturing each cell before placing the cells in a salt-water solution for 24 hours.
seeing as though i had no drama the last time i was going to puncture the cells whilst i was indoors, as i was inside having just unsoldered connecters etc.

the resulting explotion is a warning not to puncture your cells indoors. my first disposal was outdoors as i was pretty nervous of what may have happened, and like i said, there was no drama on that occasion - and like anyone else who has dismantled one or many lipos without incident, DO NOT BECOME COMPACENT.

just so glad that it took it outside as the explotion and subsequent smoke was pretty intense, lasting for around 10 or more seconds. because it was a bright, sunny day i couldn't see if there was any flames, but i am assuming there was as 'things' were ashened and hot!

this is only my second time disposing of a lipo and all i can say is that i am glad it did explode - because say if i had my fourth, fifth or 125th lipo-disposal without incident, this 'one' may well have been the disaster waiting to happen. it really did cross my mind to puncture the cells indoors, so BE WARNED, i have!

now i am taking stock of the outcome i will ask if i have done anything wrong; should i have punctured the cells after the 24hr salt-water soaking? is the puncturing of cells no longer recommended?

i'd thank anyone who wishes to add anything, especially regarding the practice of the puncturing of cells.

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06-04-2010 05:08 PM  7 years agoPost 2
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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I never puncturing cells. I just drop the whole thing into a bucket of water with a liitle salt for a few weeks.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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06-04-2010 05:11 PM  7 years agoPost 3
Flexis

Senior Heliman

Westerlo-Belgium

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Glad nothing bad happened. But I would never try to puncture a lipo indoors.

Although my way's aren't very pretty either. Last week I disposed of a badly damaged lipo (basically chopped in half during a crash) by smacking the remaining cells with a pointy stone I found

Did the job though, afterwards I poured a bucket of water over it, looked dead to me.

RJX X-treme 50EP 12s
Hovering is for planks

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06-04-2010 05:14 PM  7 years agoPost 4
VooDooX

Elite Veteran

San Francisco Bay Area CA, US (San Mateo)

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my dog decided to puncture the last lipo i threw away

Velocity 50 "99.9999999999999% of an atom is empty space." also 01001000 01001001

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06-04-2010 06:16 PM  7 years agoPost 5
Oracus

Senior Heliman

West Terre Haute, IN

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Outside I toss mine in my firepit then spear them with a pitch fork

450Pro~Vision50~EXI450~

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06-04-2010 07:58 PM  7 years agoPost 6
Dakine

Elite Veteran

OC, Commifornia

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my dog decided to puncture the last lipo i threw away
Good way to BBQ your dog

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06-04-2010 08:15 PM  7 years agoPost 7
Sonic88

Veteran

Murfreesboro, TN

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Yea I have never heard that you were supposed to punture them before submerging in salt water. Especially indoors! Glad you are OK.

Procrastinators of the world unite ... tomorrow.
AMA #: 912822

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06-04-2010 08:16 PM  7 years agoPost 8
KenJ

Veteran

Ohio, USA

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Lipo Disposal

I follow this:

http://thunderpowerrc.com/PDF/DISPO...O-BATTERIES.pdf

Ken

Team Horizon

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06-04-2010 09:09 PM  7 years agoPost 9
Busher

Key Veteran

Manchester, England

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I too had heard the tale of puncturing the cells but i shyed away from it. I have always discharged mine to a low level and then dropped them in a bucket of salty water for a couple of weeks. There about as good as dead when they come out of the water and then i put them in the dustbin .

By the way I have looked into on the puncturing theory and it is a good idea in theory, Also it would appear it depends on how you puncture the cell. If you go and bang a pitch fork/nail or other sharp implement through them you can expect the worse to happen. If you just pierce the outer shell with a small tack just enough to break through the coating (after discharging) them dump them in the salty water you should be OK.

But to be on the safe side discharge them and dump them in a bucket of salty water till they are rendered useless.

Good luck
Busher

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06-04-2010 09:23 PM  7 years agoPost 10
str8den

Veteran

NE U.K

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By the way I have looked into on the puncturing theory and it is a good idea in theory, Also it would appear it depends on how you puncture the cell. If you go and bang a pitch fork/nail or other sharp implement through them you can expect the worse to happen
thanks for all your replies. i think in the future i will just pierce the cells with a scalpel or something, and not a hammer and centre-punch!!
yes, i used a hammer and punch - so it goes to show that a heavy crash or dropping the batt. onto something sharp could cause an explosion.

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06-04-2010 09:31 PM  7 years agoPost 11
Farrell

Senior Heliman

Huntington Beach, CA

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If the pack has energy stored in it (voltage) it will release that energy quickly if your puncture it. Two solutions: put it on a discharger and take it close to 0V, or put it in a bowl of salt water. The salt water is electrically conductive and will slowly drain your battery. The bubbles you will see in the water see are hydrogen and oxygen so keep flames away.

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06-04-2010 11:31 PM  7 years agoPost 12
Ravenhyper50

Key Veteran

Canada's Capital

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I never heard of puncturing them before putting into salt water

I always discharge the lipo then stick it in a bucket of salt water then puncture with a steak knife and watch the bubbles. After a couple hours its good to go in the trash, safe!

Raven

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06-05-2010 12:00 AM  7 years agoPost 13
bob00

Veteran

Toronto, ON

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No need to puncture lip cellS before placing them in salt water. The only reason to puncture lipos is to see the fireworks.

- Rob

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06-05-2010 12:20 AM  7 years agoPost 14
rexxigpilot

rrProfessor

Florida

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thanks for all your replies. i think in the future i will just pierce the cells with a scalpel or something, and not a hammer and centre-punch!!
WTF! Never puncture a LiPo cell! I don't care if you are J/K or not. Even mentioning this is what creates unwise rumors to do stupid things like puncture LiPo cells.

The reason you are supposed to dispose of a LiPo by dumping it in salt water in to slowly drain away all charge from the cells. If you start with a drained/discharged pack, it only takes about 24 hours to bring the voltage to 0. Remember, salt water conducts electricity, but not very well.

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06-05-2010 02:15 AM  7 years agoPost 15
davidjc

Senior Heliman

E-Town , Kentucky

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Salt water bath,you will see the reaction of the salt water shorting the +/- nodes. When the rolling of the water is done after a couple days I wrap some tap around it a toss it in the trash.
That's the way I do it,but you can read it for yourself in any form that talks about LiPo disposal.

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06-05-2010 06:24 AM  7 years agoPost 16
MikeC

Key Veteran

Mosinee, WI

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The only reason to puncture lipos is to see the fireworks.
You're not going to see fireworks if the cells are thoroughly and properly discharged first. And keep in mind, the cell is going to get punctured whether you do it yourself or not. Whether because of something getting dropped on it in the dumpster or getting rolled over by those huge heavy wheels on the loaders they use in the landfill to compact everything, it's getting punctured. I've disposed of a 4 or 5 LiPo's over the years and have done the same the same way. Discharge it on my charger to as low as my charger allows, soak it intact in a salt water solution for several days and then puncture it and leave to soak for another several days and then toss it.

Just remember, if you believe it's not safe to puncture the cells (after fully discharging the pack), how can you think it's safe to toss it in the trash where it's guaranteed to get punctured?

Century Swift, TREX 450, Blade MCX, Spektrum DX7

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06-05-2010 07:52 AM  7 years agoPost 17
Ravenhyper50

Key Veteran

Canada's Capital

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^^^ Tried tested and true!!!

Raven

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06-05-2010 12:07 PM  7 years agoPost 18
Mike0251

Veteran

Hills of the Blue Ridge VA

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Toss in burn pile (no fire) add a few well placed .22 rounds and let sit for three weeks. Works great. Still have not seen a fire from that as yet. Just a litle smoke.

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06-05-2010 01:21 PM  7 years agoPost 19
rcjon

Veteran

Macon, GA

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I just put them under the seat of the wife's car.

Ask your doctor if your heart is healthy enough for Radio Control Helicoptering.

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06-05-2010 02:21 PM  7 years agoPost 20
Thatlumox

Senior Heliman

NY

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Darwin Award candidate?

"I'm a dirt torpedo!"

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