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HomeAircraftHelicopterMain Discussion › Lipo volatility myth or fact?
10-08-2012 11:38 PM  5 years agoPost 21
gologo

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Sedalia, Mo USA

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I have ask this question before, but never really get a good answer.

Do any of you store in those small fire safes like you can get at
dept/hardware stores? I have a couple that I use and still not sure
I am fully trusting of them. They are designed to keep fire out;BUT, what about keeping fire IN?? And like some of you have
mentioned, if the seal goes tight like it is supposed to, in the
event of fire, is it setting up for an explosion then, if lipos
went off within?

I have been dealing w. lipos since '05, w. NO issues, other than
some very puffed packs over those years.... BUT, realize it only
takes once to put a house to the ground!!

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10-08-2012 11:46 PM  5 years agoPost 22
deafheliflyer

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Arizona

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Fire Safes are enclosed, no vents... From doing my research, you need to have some sort of "vent" or whatever "containment" you use will become a bomb in themselves..

I just learned that ammo boxes have rubber seals on them, I took them out and now I have a vented box.. I keep my lipos in a lipo bag inside the ammo box..

I will experiment.. since I am best buddies with the fire department here in my city.. I will attempt to set lipos on fire by various means, and I will test the lipo bag/ammo box/vented system/fire safe container...

I have FULL CONFIDENCE that unless someone charges the lipo wrong, or it is damaged from a crash or dropped on the floor.. that the lipo WILL NOT spontaneously blow up.. And if they do, the lipo bag and ammo bag WILL FULLY CONTAIN IT. other than smoke or smell damage

I will test it, and I will prove it to be true. So far most of the PM's Ive got is "I know of someone that this happened to" but a few that experienced spontaneous bursting...... (READ THIS RIGHT.. spontaneous bursting )

If my experiment fails.. I will take up nitros again.. But then again, even nitros have lipo batteries for servo power (unless Im going to go back to ancient of days and keep NiCads and NiMH's

Crash-Prone and overcoming it!!!

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10-09-2012 12:14 AM  5 years agoPost 23
gologo

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Sedalia, Mo USA

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, nope, no interest in going back to round cells here either.

Would love to see your test results, but where are all your 'test'
lipos coming from?

The spontaneous thing is what I don't want to hear.

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10-09-2012 12:18 AM  5 years agoPost 24
RappyTappy

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Traveling the USA

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Put fine sand in a zip lock bag on top of the lipos when charging and storage. If they go off, the sand will come out of the bag and seal the rupture by turning into glass because of the extreme heat.

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10-09-2012 12:28 AM  5 years agoPost 25
Solmanbandit

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Tucson , AZ

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Watch at YouTube

Watch at YouTube

Trex 700E / Trex 500 ESP - Ikon/ HD 500 - Ikon 2/ Goblin 500 Ikon 2

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10-09-2012 12:29 AM  5 years agoPost 26
deafheliflyer

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Arizona

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Nice Photo..

Ammo Box did its job eh?

Crash-Prone and overcoming it!!!

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10-09-2012 12:30 AM  5 years agoPost 27
bigbadflyer

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Middle Earth New Zealand

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Put fine sand in a zip lock bag on top of the lipos when charging and storage. If they go off, the sand will come out of the bag and seal the rupture by turning into glass because of the extreme heat.
Thats sounds like a great idea. Deafheliflyer, do you want to add this to your experiment list?? I would love to see this in action.

New Zealand Helicopter Sheep Hearding Champion :-)

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10-09-2012 12:34 AM  5 years agoPost 28
RappyTappy

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Traveling the USA

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I got the idea of sand in a zip lock from a vid I saw where they experimented with different ways of containing a lipo fire and it was the best thing they tried. Also, the sand will smother everything and protect the other batteries from getting destroyed.

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10-09-2012 12:35 AM  5 years agoPost 29
deafheliflyer

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Arizona

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Thanks Solmanbandit..

That means a lipo sack PLUS vented ammo box should work..

Hmmmmmmmmm.. Interesting thought.. Ill take that thought.. have a few beers tonight and ... take it to the pepper shaker and GRIND IT

Yay

Crash-Prone and overcoming it!!!

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10-09-2012 12:36 AM  5 years agoPost 30
deafheliflyer

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Arizona

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How about Lipo Sack covered with sand.. IN ammo box that is vented LOL

winks

Crash-Prone and overcoming it!!!

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10-09-2012 12:37 AM  5 years agoPost 31
Solmanbandit

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Tucson , AZ

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In this video, you can see the ammo box being tested as it happens.

Watch at YouTube

Trex 700E / Trex 500 ESP - Ikon/ HD 500 - Ikon 2/ Goblin 500 Ikon 2

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10-09-2012 12:39 AM  5 years agoPost 32
Solmanbandit

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Tucson , AZ

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That means a lipo sack PLUS vented ammo box should work..
Most definitely. In the third video he uses just the ammo can and it contains it. It is hot, but nonetheless contained.

Trex 700E / Trex 500 ESP - Ikon/ HD 500 - Ikon 2/ Goblin 500 Ikon 2

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10-09-2012 12:41 AM  5 years agoPost 33
deafheliflyer

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Arizona

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Keep in mind
those videos DELIBERATELY set those lipos on fire...

Crash-Prone and overcoming it!!!

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10-09-2012 12:47 AM  5 years agoPost 34
Solmanbandit

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Tucson , AZ

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Oh yea, definitely. He was testing different containment methods. I figured that was pretty obvious. I also liked on how he threw in a few extras to see if they would catch or not.

Trex 700E / Trex 500 ESP - Ikon/ HD 500 - Ikon 2/ Goblin 500 Ikon 2

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10-09-2012 02:37 AM  5 years agoPost 35
Cra-Z-1

rrApprentice

Washington,UT-USA

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Here's a thought....

How many of you Store your Laptop or your Cell phone in a ammo can? HOw about you nifty Cordless screwdriver set that you leave a battery on the charger on a continuous basis? Looks like your car is eventually going to be parked in your garage, and it will run on a giant lipo battery also....See the new Nissan? These things are in everything nowadays, from big items to small ones. They are far more abundant than alot of people realize they are. I think they are fairly safe or, given that they are so abundant in our every day lives, we would hear from alot of people having fires with them. I believe that a post crash fire is not usually because the cell is compromised, but because the solder tabs and internal wiring that joins the cells together, gets damaged, causing a short.

All the hype I hear about lipo fear, makes me often worry about all my batteries. They make me nervous, but anything thats going to deliver 100 amps of current is sure going to have the ability to cause a fire; be it lipo cells or any other sort of energy delivering technology. Its just the nature of the beast.

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10-09-2012 03:12 AM  5 years agoPost 36
BobOD

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New York- USA

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Here's a thought....
The applications you mention are designed with more safety, and less power to weight, than what is used in RC. This is a common misconception...that RC batteries are as safe as home electronics. Simply not so...not by a large margin.

Also, there was an issue with some laptops a few years back and it resulted in a big recall. An electric car has caught fire and caused great concern...I think the Chevy Volt was taken off the market. It seems the failure rate has to go much higher for this to happen with RC. RC needs to be treated with much greater care.

Team POP Secret

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10-09-2012 03:22 AM  5 years agoPost 37
rpat

rrElite Veteran

Weirton, W. Va.

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OK guys how do you measure the IR that every one talks about. I have two Hyperion chargers a 610 duo and a 615 duo. Do they measure IR?

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

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10-09-2012 03:28 AM  5 years agoPost 38
icanfly

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ontario

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It looks like a bag of sand on top of the lipo in charging and/or storage in a vented ammo can or any other thick walled metal container will suffice to contain and smother a flamed out lipo.

It should be obvious that the ends of a battery are the most damage prone area of a lipo, where the thin lipo film and polymer might short easiest. Why don't you cap the front with a thin rubber or foam lined aluminum cap? A little velcro inside to make removal a cinch.

A hard landing this aft dislodged a lipo and dinged it slightly, After seeing this thread I think I will take the precautions to avoid a disaster when it gets recharged, to be on the safe side.

Good info here.

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10-09-2012 03:28 AM  5 years agoPost 39
deafheliflyer

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Arizona

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Yes they do In milliohms

Crash-Prone and overcoming it!!!

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10-09-2012 03:36 AM  5 years agoPost 40
h2jringo

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Redmond Oregon

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LIPO BEWARE
This is what happens when a charger malfunctions about 15,000 in damage

Quad copter and Camera mount design

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HomeAircraftHelicopterMain Discussion › Lipo volatility myth or fact?
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