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HomeAircraftHelicopterMain Discussion › Lipo Smoke Off, Why A LIPO FAILS ON THE CHARGER
10-27-2014 03:35 AM  3 years agoPost 21
rpat

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Weirton, W. Va.

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I would never insinuate that the OP is a ftard or anything else that you said........well maybe

trex 700fbl cal30,minititan,, trx600fbl,trex250,logo 500,Velocity N2

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10-27-2014 04:26 AM  3 years agoPost 22
HeimD

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the great southwest

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^^^ LOLz ^^^

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10-27-2014 12:14 PM  3 years agoPost 23
icanfly

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ontario

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The UPS 747 that crashed in Dubai Sept 03, 2010 was caused by lithium batteries. Killed both pilots.
uh huh

the lipo in my laptop puffed from overheating last summer, was IN THE HOUSE, now who's on drugs? Soorry to say I'm not into a cock fight to promote my system, it's mine because I said it here first, whatever someone does from now I ave no control over but I've just divulged some pretty good IP, for that I must be on meds right? NO, I'm buzzing on life, things are going well lately, and fortunately I still have a house to reside in with all my belongings, get the PICTURE? Sure you do.

I did model a tutorial object in an ancient 1999 autocad a certain mold designer gave me, ancient, pretty retarded version but that's what they had to work with back then, yes you would be spending a considerable amount of time just deciphering the gadang program instead of making your dreams come true.

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10-27-2014 09:06 PM  3 years agoPost 24
HeimD

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the great southwest

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Remember folks... Pot's legal up in Canada, eh, and it shows.

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10-28-2014 12:18 AM  3 years agoPost 25
icanfly

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ontario

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Remember folks... Pot's legal up in Canada, eh, and it shows.
tossing cells worth $25 each in a six pack, 5 good ones = $125 more or less, now who's a dope

were we talkin weed or lipos, anyway not everyone is into this gang bang pothead shyt of any of yours, I don't see where it fits in either so Ill politely tell those who are playing that card to get LOST, go poke someone else with your illness,

back to reality. LIPOS, ONLY LIPOS we be talkin, ONLY LIPOS, CAPICHE?

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10-28-2014 12:20 AM  3 years agoPost 26
EEngineer

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TX

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I don't think a vent hole on a LiPo would work as you envisioned.

Lithium is the most reactive metal when exposed to air.

Remember, it's at the top left of the periodic table...

When a LiPo is "pierced" and exposed to air, it fires up depending on its state of charge.

FWIW

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10-28-2014 12:30 AM  3 years agoPost 27
icanfly

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It should have been specified the vent would only open outward and remain tightly closed to any possibility of external oxygen exposure, similar to those on capacitors. Lithium is not a spark but a catalytic element. off gassing oxygen which is the flammable element before the polymer ignites. High heat and the possibility of spark through a shorting of any lead or metallic element present would cause a flame to erupt, otherwise it's all smoke and only smoke.

Right me if this is somehow in need of correction.

In my case the lipo acted much like something in a frying pan where say oil heats up to the point of smoking then becomes a saturated flammable fume then ignites if the pan was on a gas stove where a flame was present, no flame no fire. I put out a stove fire where the element was red hot and the oil was spattering onto it from the pan, then it ignited to be put out with a simple lid, what an easy peasy way to end the panic, sheesh.

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10-28-2014 12:48 AM  3 years agoPost 28
EEngineer

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TX

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Right me if this is somehow in need of correction.
Here goes....

Lithium is an metallic element. It is the 3rd lightest element in weight, behind hydrogen and helium.

Lithium will react not only when exposed to air, but also when exposed to water.

When exposed to air, it oxidizes.

Since water is H2O, it reacts with the oxygen and the hydrogen.

It does not "gas off" oxygen at all....it reacts with it and forms another chemical compound...while giving off large amounts of heat.

The "frying pan" analogy is not correct.

FWIW

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10-28-2014 12:59 AM  3 years agoPost 29
icanfly

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I'm doing a bit of wikipedia reading on reactivity of alkali metals, moles, valences, orbitals, fascinating stuff.

the lipo that vented burned its own hole in the side of the pack just beside the metal tab going into it on the positive lead. Ever unwrap a dead lipo cell?

my lipo went off like it was on a stove burner, no flame, exhaust only.

If you discharge a lipo and open it up to oxygen will it react and heat up, or does the polymer protect the lithium from oxygen exposure?

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10-28-2014 01:30 AM  3 years agoPost 30
HeimD

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the great southwest

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CAPICHE?
Do you mean capisce? At least get your Italian slang correct...

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10-28-2014 01:34 AM  3 years agoPost 31
payne1967

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uk

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who's got the pop corn?

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10-28-2014 01:36 AM  3 years agoPost 32
HeimD

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who's got the pop corn?
Constanza!

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10-28-2014 02:00 AM  3 years agoPost 33
EEngineer

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TX

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does the polymer protect the lithium from oxygen exposure?
In general, a "polymer" is a chemistry term used to describe a repeating "chain" of identical molecules in a material.

So, that question doesn't make sense to me...

It's the packaging that isolates the lithium from the air.

FWIW

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10-28-2014 11:33 AM  3 years agoPost 34
Richardmid1

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Leeds, England

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There is more chance of your microwave setting on fire cooking your popcorn than having a li-po fire!

Use your common sense and get on with your life.

60% of the time, it works every time!

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10-28-2014 11:58 AM  3 years agoPost 35
rpat

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Weirton, W. Va.

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When lipos first came on the scene there was a lot of talk of replacing dead cells the way ftard is talking about( hey ,I am only calling him what he calls his self). I just don't feel that it is worth the risk with dealing with those small tabs in tight places.

trex 700fbl cal30,minititan,, trx600fbl,trex250,logo 500,Velocity N2

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10-28-2014 12:24 PM  3 years agoPost 36
icanfly

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ontario

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this is interesting.

A dock for a lipo "CARD" where the voltage is achieved through whatever parallel or series connections within it, is always going to keep the configuration together in a singular unit until a cell dies. This would make usage simple as a pack would stay an assembled unit at most times and only when a cell dies would it be replaced without fear of solder and polarity problems, that is in the design of the dock.

End caps would keep the unit together while heat dissipation is maintained through open sides, the collective unit snapped together or zip or velcro'd A thin sheet of aluminum stock between each cell would protect cells from each other in use and or on the charger. I suppose a charger could be similar to a household power tool charger where the lipo unit is docked into a charging station.

The present method of lipo power packaging is simple and cheap, but wasteful and expensive to the end user in the larger scheme of things, 'tard.

think C_E_L_L_P_H_O_N_E_B_A_T_T_E_R_Y (16 cell lipo)

now imagine, your going to refuse a 12 cell s5000 44.4v lipo because one cell on the corner is suspect after you crashed or it fell off the bench'tard, yeeeeaaaaah your a winner,,,,,,,tard. $250, two hundred and fity'tard plus dollar'tards la'tard, yum.

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10-29-2014 12:50 AM  3 years agoPost 37
TMoore

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Cookeville, TN

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The problem with some of what you are proposing is that for high current draw applications a modular construction isn't ideal.

Delayed Response Operator Not Engaged
AMA SECTION 336 = Good
Drones = EVIL

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10-29-2014 12:54 AM  3 years agoPost 38
Retired2011

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Lee's Summit, MO

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Yeah, but modutard construction might be OK.

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10-29-2014 04:33 AM  3 years agoPost 39
rpat

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Weirton, W. Va.

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I really don't care I still like Orvile...and that is all I have to say about that.

trex 700fbl cal30,minititan,, trx600fbl,trex250,logo 500,Velocity N2

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10-29-2014 05:45 AM  3 years agoPost 40
EEngineer

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TX

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What about Wilbur?

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HomeAircraftHelicopterMain Discussion › Lipo Smoke Off, Why A LIPO FAILS ON THE CHARGER
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