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liPo's in an AMMO box?

duke666

Key Veteran

Hampshire, UK

After reading several posts on here lately I have purchased several AMMO boxes for primarily storing LiPo in.

I have read that some charge in an AMMO box and wanted to know if you drilled any holes for letting the pressure from a LiPo fire out in a controlled manner? If you are leaving them sealed and sealing the wires somehow how does pressure escape in a controlled manner without simply opening the pressurised container?

The same goes for storage but in this case you could not know there has been a fire until you open the pressurised container, scary s**t.

And lastly, anyone actually had experience of a LiPo fire in an AMMO box?

Duke

OOOPPS............

05-10-2010 Over year old.
HOMEPAGE  
Bell 430

Senior Heliman

West Grove Pennsylvania

I do use an ammo can.
The way I've done mine, I closed the lid and latched it shut
I drew a line which followed the lid "lip" I opened the lid and drilled four holes on each side between the line and the top of the can. then I charge batteries

Brian Porter AMA 232513 My money flies better then I do

05-10-2010 Over year old.
TJinGuy

rrProfessor

Socorro, NM - USA

There is no need for holes.

- Chris

Team New Mexico
TJinTech

05-10-2010 Over year old.
HOMEPAGE  
duke666

Key Veteran

Hampshire, UK

There is no need for holes.
1, How do charge wires get in?

2, How do you safely release the pressure in the event of fire?

3, With the lid latched, can the AMMO box contain the pressure?

Duke

OOOPPS............

05-10-2010 Over year old.
HOMEPAGE  
TJinGuy

rrProfessor

Socorro, NM - USA

1) You never said anything about charging in an ammo can.

2) Lipos are not bombs, they catch fire and burn. With no oxygen and the reaction is severely limited.

3) Even if the can didn't, it wouldn't explode. Worse case it would deform the case until a leak developed. Again lipos are not bombs. They do not explode, they burn. Look for the guy with the cash box video and you will see what I mean.

I wouldn't charge in an ammo can. There is just not a nice way to get the wires inside without the possibility of smashing one at some point. Storing them in one is fine but charge in a lipo sack if you are worried. And when I say lipo sack, I mean a real one, not a cheap knock-off.

- Chris

Team New Mexico
TJinTech

05-10-2010 Over year old.
HOMEPAGE  
kcordell

Elite Veteran

O Fallon, MO

I charge my 5S packs on the bench, NEVER OVER 1C! Take care of your lipos and they will be fine. There is a youtube video of a guy driving a nail thru a lipo and then putting it in a small metal cash box. Lot's of smoke and some burnt paint on the outside but nothing else.

Team Futaba, Team Thunder Tiger, Team Scorpion, Team Castle Creations, YS Engines, VelTye

05-10-2010 Over year old.
tisrich

Senior Heliman

western NY

I use an ammo can only to store my batteries. When I charge them they always go in a lipo sack, one at a time.

05-11-2010 Over year old.
duke666

Key Veteran

Hampshire, UK

1) You never said anything about charging in an ammo can.
You're right, I didn't, sorry.

Thanks for the advice, best for storage only, charge in quality LiPo sack which I always have done.

If a LiPo went off in a box, would there be pressure in the box after the event, and could the in rush of air re-ignite?

As there would be no way of telling such an event until opening the box, what a surprise that would be.........


Duke

OOOPPS............

05-11-2010 Over year old.
HOMEPAGE  
falcon

Key Veteran

UK

Just one tip.
Never store all your lipos together.
One goes pop they all go pop.

05-11-2010 Over year old.
HOMEPAGE  
duke666

Key Veteran

Hampshire, UK

That could be a big POP!

Duke

OOOPPS............

05-11-2010 Over year old.
HOMEPAGE  
TJinGuy

rrProfessor

Socorro, NM - USA

If a LiPo went off in a box, would there be pressure in the box after the event, and could the in rush of air re-ignite?
Lipos only burn when they get hot, very hot actually. So if the box it not hot there is no way for them to "re-ignite".

Honestly the only way to know what a lipo does when it burns is to see one in person. That is why I often suggest that people take old, unused lipos out and safely set them off so you can see exactly what happens when they do burn. Many people are horribly opposed to my suggestion but it really an educational experience and likely something you will see eventually anyways so why not do it in a controlled manner? Just make sure you are safe about it and make sure the lipo is fully charged for the most violent reaction. A discharged lipo just about won't ignite, we have tried.
One goes pop they all go pop.
That is not true. I have seen a 3s lipo have just one cell go and the other never went off. But even if the others went, they would not do it simultaneously, it would take a while for each to fail.

- Chris

Team New Mexico
TJinTech

05-11-2010 Over year old.
HOMEPAGE  
Justin Stuart

rrMaster

Plano, Texas

I have one ammo can which I drilled a hole in a few years ago when I was afraid of a lipo exploding on me. Now I use it to hold tools.

My other lipos cans without the holes are used for storing my batteries. I think it is better to have them sealed. That will put out a fire faster if they spontaneously combust when I'm not home.

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

05-11-2010 Over year old.
Helijockey

Key Veteran

150 miles from somewhere

In an extremely warm climate is the ammo box still the best way to store lipos? Also if u have ten lipos then u need ten ammo boxes to store them

05-12-2010 Over year old.
duke666

Key Veteran

Hampshire, UK

I think you're fine to store several in each, the point is not to have all your eggs in the same basket and to control the broken eggs.

Thanks for your advice Chris.

Duke

OOOPPS............

05-12-2010 Over year old.
HOMEPAGE  
duke666

Key Veteran

Hampshire, UK

Finally got my AMMO boxes washed out on the weekend and feel happier with the LiPo's inside them in the garage.

One further question. which type of fire extinguisher is recommended for LiPo fire?

Duke

OOOPPS............

05-17-2010 Over year old.
HOMEPAGE  
Pistol_Pete

rrProfessor

Seffner, FL

Ammo boxes are really a bargain hunters dream when compared to lipo sacks. They also provide a means of storage protection vs a bag.

I use ammo box for storage as well as for charging WHEN in confined areas where combustibles might be near such as indoors. Outdoors in open spaces, the ground does just as fine.

Box is latched closed when transporting. Otherwise remains unlatched with lid down when charging. (unlike photo in gallery)

If it was to catch fire inside ammo box, the almost closed lid will keep it confined.

Lipo fires are class D fires so your best option is sand.

Place sand in zip lock over batt being charged, if batt catches fire, it will burn plastic releasing sand over batt "assisting" in a control fire.

A clay pot can also be used as a charging station...just make sure if it has a hole in bottom that its not ON anything combustible.

Another overlooked possibility is a concrete block.

Best of luck!

~~Enjoying the hobby one flight at a time~~

05-17-2010 Over year old.
HOMEPAGE  
GyroFreak

rrProfessor

Orlando Florida ...

But even if the others went, they would not do it simultaneously, it would take a while for each to fail.
True, here is a 5 cell lipo, outer cell was damaged in a crash and started burning, each cell burst into flames sequentially, one or two seconds apart.

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

05-17-2010 Over year old.
dxflyer

Senior Heliman

Bay area, California

I use this for storage and transport

Eventually I will create dividers from sheet metal when I get a chance.

06-27-2010 Over year old.
RappyTappy

rrProfessor

Fort Collins, Colorado

Lipo sacks are a waste of my money IMO. I charge in a old pot with sand on the bottom and a plastic bag of sand on top of the battery. I've seen videos and the sand does a excellent job of controlling the flames. I'm going to be getting an ammo box and lining the bottom with Sheetrock and Sheetrock dividers to protect the other batteries in the box then top it off with bags of dry sand.

06-27-2010 Over year old.
onebigjunker

Veteran

Wellsville, Ks

I store mine in a cadboard dox, as long as there not damaged or puffy!
no problems so far! did have one burst ar IRCHA a couple years ago, but no flames or smaoke, just a bang, my Charger went bad! so I am still lucky!

work hard, play even harder!!!!

06-27-2010 Over year old.
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