How to make a Lipo charging safety case made from Army 50Cal Ammo Box Storage Metal Case
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- Опубликовано: 13 окт 2020
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disclaimer - I am not a lipo expert and I only show you what I do, it is down to you how you manage and store your own lipo batteries.
Lipo charging safety case made from Army 50Cal Ammo Box Storage Metal Case, this is how I made a charging case for my lipo batteries.
lipo battery
A lithium polymer battery, or more correctly lithium-ion polymer battery (abbreviated as LiPo, LIP, Li-poly, lithium-poly and others), is a rechargeable battery of lithium-ion technology using a polymer electrolyte instead of a liquid electrolyte.
The main advantages of LiPo battery cells are that they have about four times the energy of density of nickel cadmium or nickel metal hydride batteries. LiPo batteries are very lightweight and pliable, and can be made to almost any size or shape.
The typical lifespan that we can expect from a LiPo battery pack can on average about 2 to 3 years
The maximum charge cycles for most LiPo batteries tends to be around 300. But even 300 recharge cycles is optimistic. That only applies to higher quality batteries. Many LiPo batteries will not even last for 300 charges,
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Top tip from someone that drills metal on a regular basis.
Always drill a pilot hole first, 3.5mm is my go to size. Then go to the required size drill bit. Makes it so much easier.
Also if you need a hole larger than the size of bit you drill chuck can accept, buy a step drill. Pick one up for next to nothing from most hardware stockists. Makes a way neater finish than doing the hula dance with your drill and undersized drill bit! Also safer the drill won't snag sending the work piece spinning across your work bench! 👍
I just built my own battery bunker from the same type of ammo can.
Before that, I spoke to a firefighter on what they would do if they were to store LiPo batteries.
Based on the information I got, I used this approach:
I lined the inside of the ammo can with .5 inches of sheet rock. The bottom has a double layer of sheet rock with a cutout for the raised indent. The sheet rock provides pretty good thermal insulation. For transport, the recommendation was to put the batteries in a vermiculite based packing material (lightweight, provides cushioning, is inflammable). A vent hole with some steel scrub pads (NOT steel wool, because that stuff is pretty flammable!) stuffed in front will also mitigate the risk of a flame shooting out of there and affecting the surrounding area.
Oh, and the smoke is also pretty dangerous in itself. Not only does it smell quite bad, it also contains Hydrogen Flouride (HF), which is extremely corrosive and toxic af. There is no way to filter that reliably with anything you could buy at the hardware store.
And for those cases where stuff is really going sideways, the recommendation from said firefighter was to dump a big old load of sodium chloride (a.k.a. table salt) on the whole thing. They basically use the same approach for metal fires (e.g. Magnesium - and also Lithium). Yes, I know - there is very little metallic Lithium - if any - in LiPo batteries. Still, in the case of a fire, the salt will melt (NaCL melts at approx 800 degrees C) and encase whatever is burning.
christ mate gone to town on gthat one!!!
Instablaster...
I'd love to hear more about this. Did you encounter a situation where it was put to the test? I'm planning to mod my own ammo box with this in mind. For the fumes, I plan on placing the whole ammo box in a larger metal "fume box" where it's sealed with an exhaust fan to chuck out the fumes outside.
Do you have a link how the sheets look like? Would like to search for this in Germany.
do not put water or any sort of fuel on the burning Lipo, even if Metallica sings "fight fire with fire", throwing your neighbor's barbecue on your Lipo, does not stop your bat from burning.
Looks great. I think I will probably build one myself. Just a not though, if you use a center punch to dent the metal a bit the drill bit won’t walk on you and definitely secure what your drilling so you don’t hurt your wrist.
Good stuff! Ill definitely be doing that!
cool man, make sure you do remove that rubber seal in the lid though!! - do subscribe, thanks
nice. thanks!
while i wait for a box like this, how about i store lipos in a metal thermos bottle? it does also have a hole for venting in case of issues, and i'll make sure the vent is directioned towards something that does not burn 😃
A stepper bit is nice to have
This is an excellent idea to contain a fire.
In 91 my house burned down. I had a ammo can full of rounds. They went off in the box. The box was intact and not a single round punchered the can. It had a serious amount of dents from the inside. I could still open the can and poured out spent cases and a blop of lead.
So it is very rugged. The only downfall I can see is the ports can have flame coming out like a rocket if a battery cooked off.
So there must be some type of way to seal them. Maybe make some leads for through the can. Then on inside section off a small spot and pour Chico and let it setup with leads through the wall.
Sealing the box would turn it into a pressurised bomb, unless you extinguish the flame. The point of putting it in a box is to buy time whilst you take it outside.
With those big holes in the side couldn't tons of smoke, sparks, etc. Get out? I feel like also putting them in a fireproof lipo bag would help
Can you make small holes on top to release pressure just in case?
Most guides say to remove the rubber gasket from the sides but leave it at the front latch so that the latch still tensions properly.
Heres a few items to ease the job.
A punch, 20mm reduced shank HSS bit, safety glasses.
Can you put the battery in those kevlar battery bags and then put them in the ammo can, or would that make a hotter enviroment for the battery?
no mate overkill, I wouldn't do that at all...
Have you tested it to see if fire comes out the holes you drilled?
Of course it does. That's why batsafe plug is so so tight. And it has alot of vent holes to let gasses out.
Big lipo can go up so fast. So much flames and pressure
@divingfalconfpv4602 that's what I am trying to say. This design looks like it will shoot the flames right at the charger or the floor, causing it to go on fire.
@JoevsRc I finally got a batsafe. Bit 50cal cans after removing seal are great. Just I'd prob put the holes on the top maybe. But the sheet rock idea is great
Well done...thank you
Do you also store fully charged (to be used, soon), or storage charged batteries in the ammo case?
I do keep my lipos in a ammo case, I think its better than just loose.. remember you need to take out the rubber seal if you use a ammo case, there are horrific videos on youtube showing what happens if you don't... and a lipo does go off.
@@Datfpv thanks so much for that info!
@@Datfpv i know without balance charge or doing over charge they can blust but can lipo batteries get blust when i store them in safe place some moths or some days without using ?plzz reply sir i am in new in this hobby. i have one 3s 4000 mah battery and two 2s 2000 mah battery is it safe in one ammo box ?
@@Datfpv Rather than remove the rubber seal from mines (it made the lid feel too loose when carrying it) i cut out a few inches from the rubber seal instead so it can vent if needed.
You can also drill some small holes in the lid
@@hardcoretam Similarly, I cut out everything but the side where the latch is. That way the latch side doesn't flop around. The hinge side seems to be sufficiently tight without a gasket on that end.
So you can only charge two batteries with that setup? Did you ever upgrade to a parallel board that supports multiple XT60/XT30 connections to charge more than two packs?
you could put a parallel board inside, sure it would fit.
how about using a fire blanket inside the box so the lipos are wraped in them for storage?
why not!
I would like to make one of these boxes the Balance cable on my batteries are too short. What was the "Board" that you placed inside? Did this act as an extension to your balance cable?
they came with the charger, they are balance boards, they have connections for 2s, 3s, 4s, 5s, and 6s balance leads for charging
you can also buy lipo extension cables to keep charger a bit away so flames don't come out of the holes and char your charger and also so you have more room to disconnect charger if a fire does start inside the box
quick tip, drill a smaller hole first, makes it so much easier.. and you can be more precise.
I did pretty much the same, but I installed connectors so I do not have the cables dangling around. and drilled 2 6mm holes in the lid and put some tape to cover them, so the pressure in case of a fire is not blowing out the connectors.
great video btw!
Cool, thanks
Do you have any photos of your solution? Sounds good...
Can you use a metal bool box instead? Or is there a benefit using an amo box instead?
if its big enough?
start with a smaller drill bit then work your way up.
A stepped drill bit would have made quick work of enlarging that hole.
Hey Datfpv, I have had some problems regarding a emax tinyhawk freestyle 2 and have the betafpv lite 2 controller when I flip the switch to arm the motors and go to betaflight it says disabled. I need some assistance
Hi - if you're connected to betaflight it won't arm unless you press the switch in the motors tab... also make sure you have batteries in it (that does happen)... also if that doesn't work, see this vid: ruclips.net/video/7ZUe-sC7mmU/видео.html
and still not working.. make sure your controller is the frsky one.
also remember to subscribe!! thanks
Hey, that's completely normal, same for me. I think You need to unplug it from USB to arm, hope that helps
I do have one question:
If there was a fire inside the ammo box, wouldn't the fire just be concentrated out of the holes as it has nowhere else to go?
you would get some escape yes, but if the whole box was sealed and you do get a lipo going off it would explode due to pressure... you need some air flow, otherwise you are making a bomb in your house!!!!
@@Datfpv just remove the rubber gasket
@@JoevsRc and cut your cables when you shut the lid😅🤣
Just a query...those holes you drilled and cabled thro'...wont a fire "jet" thro' if the batteries should go off??
Hey, you need some vents else basically you have made a bomb in your home, without the vents / air it will actually explode the ammo can in your home!!!! If you have a lipo go off..... also if you do this remove the rubber seal on the ammo can lid...
@@Datfpv I agree - but the holes may well allow flames to jet through -- dont forget. - .the grommets are rubber. I'm trying to figure how to get around this and really see a problem unless the holes could be filled with fireproof clay which is available in the UK as FLOMIX ( @ Screwfix.)The stuff is mouldable so may make a decent gromet...
@@rossmansell5877 I'm wondering if there's a filter or something that can be placed over the holes. Something that lets air and maybe smoke get through but keeps the flames safely inside the box.
I realise you left this comment over a year ago so if you found a solution, please do tell me. I'm using high-quality batteries and chargers made by the same manufacturer as my vehicle, but I don't like taking chances when it can be this catastrophic.
@@mitchib1440 I would suggest just putting the holes on the top so the Flames go up instead of out the sides
@@mitchib1440 Use rock wool insulation. Won't be air tight, but should provide enough coverage to keep flames from blowing fully out. Can withstand temps over 1,000c from what I've read. It's much lighter than sheet rock also.
Any way to isolate the bottom of the box from inside or outside if set on wood floor?
? in what way
@@Datfpv I don't know if it possible to isolate the bottom part with something, just asking. I have wood floor inside my house, if the metal case would we set on the floor and something inside would get on fire and heat up the bottom part I'm just afraid it can burn the floor. I was asking if I can add some isolation on the bottom.
if you have a lipo go off in the box it will make some mess, I wouldn't want to be in the same room to be honest... sand is what they say for a lipo fire, cat litter tray? mines just on the floor in my office, I'm always here if I'm charging and hopefully nothing does go wrong
Line with sheetrock. Or could cut a lipo safe bag to line the bottom.
Bricks. They don't melt or burn and will separate the box from the floor. You can get decorative ones if aesthetics are important. But keep the box away from anything that'll burn, including walls. 3 feet, a meter, whatever.
I'd put the holes on each side so you dont plug the wrong balance port in the wrong charget
if it works then yes do that man! thanks
I thought about putting the holes on the sides, but not for that reason. Makes total sense...
Those metal shavings are more dangerous than you may think. They could get inside the cable connection you have sitting next to it. Not good.
No captions?!
Add a ziploc bag with some sand on top and you are good to go.
The two holes are not at the same height. How dare you sir?!
Thanks for the video, will be helpful.
Trying to find a video where a lipo is on fire inside one of these
they do it here: ruclips.net/video/Rv_3vwSZmzA/видео.html
Die Bohrungen bitte Pfeilen und schleifen und die Gummis rein kleben.
I'm just here to see a Corded drill wow it's been like 30yrs since I've seen one.
Honestly I think if I was going to spend $30+ on this. Not to mention if you line it with flame retardant material.I should just buy a bat-box $70 that’s lined and protects against a lot of the smoke 💨 as well. 🔥 fire is the biggest problem. What room it goes off in, the smoke will be so bad you’re going to have to gut it! An ammo box would be a good option for charging outside. It’s still better than nothing.
$30?
For an ammo can?
@@mini-z_me I really like your ceramic insulation idea sounds way better than sheetrock . Another thing you can look into is a big vent. I saw a guy on you tube hook up the on switch to a smoke alarm. So if it went off it would take care of the smoke problem. This guy bought all bat-safe boxes too lol. I would think with that kind of a setup ammo cans would suffice. The smoke is toxic to breathe and it will destroy your walls. Stay Safe
@@mini-z_me oh yeah I was going to tell you I think you should line the whole can with that insulation. I saw a video on you tube where they set one off in it. The only complaint they had was it got really hot 🥵 so if it was in the car or something it could be a problem
i store and charge my lipos under my couch
ummmm.... say no more.
To be absolutely sure, there is a product called BAT-SAFE. It's quite expensive at around 50€ but it gives me even more confidence than a solution like this. It does have a Watt hour limit though, I think it's 200Wh or something like that. Oh I forgot to say it even filters the smoke to some extent
I know the one, very expensive and if I had a battery go up I wouldn't want to be in the same room with either solution...
@@Datfpv yeah, me neither but I charge my batteries in the cellar anyways.
that really is not the right kind of drill bit to be using there..... nice and dull now
I'm not tool time timmy am I lol... I need a hole I'll use whatever lol... but yeah maybe!
Great video but battery bunkers are 15$ on Amazon. Not worth the time or energy.
I see battery bags for $15. Not sure where you're getting a metal bunker for $15. A similarly sized Bat-Safe is nearing $100.
Never mind. Sorry.
At timeline 03:40 I stopped watching... A complete lack of Tool knowledge... With all due respect, I would be embarrassed... Nice concept though... Thanks. 🤠
sorry for not holding the drill correctly 🤪 i'm not Timmy tool time lol x