Battery BOOM! box

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Sheriff420

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Overcautious, maybe. But I don't intend to be the one that is homeless with a fire to blame.

Last night I read a thread about a guy that had a battery charging and the end blew off, shot a two foot flame out and caught some stuff on a table on fire. Then I got to sketching a couple designs. I was going to make it out of steel so I could play with my welder until I remembered that aluminum box tubing that was in the shed.
The tray was cut off the end of the rectangle part and had one side hacked off. I smoothed it all down with a flap wheel on the grinder and hit the whole thing with that flap wheel to get rid of the scratches on it. I thought about paint but then I realized that it would just chip and start looking bad in no time. Painting it isn't out of the question, I'm partial to Krylon flat black and now that I think of it, that stuff does hold up pretty good.

I only intend to use the box when I'm not going to be around for a while, when I am I can just touch the battery every once in a while because I'm sure they start getting warm long before they blow.

I believe cell phones are programmed to stop charging once the battery is charged so that shouldn't be a concern. I did read on here that these batteries need to be pulled off the charger soon after they are done charging because they keep accepting juice until they can't take it any more.

Grenade, not likely. It has close to 1/8" of breathing room between both sides and around 1/16" above the top edge of the tray.

I've seen cordless drill batteries turn into paperweights from charging all the time too. My dads old Makita would last for about 10 minutes worth of drilling on a fully charged battery. That's why I have DeWalt with a cord on it now. I don't care for those keyless chucks either because you have to throw on a leather glove and about burn it with the drill just to get it to grip a drill bit tight enough. I learned what not to buy with that drill.
 

Striker911

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I bet the battery on the charger doesn't last long. Or at least happened to me

You may be on to something. I curse my Hitachi drill cause the battery never last's long. You saying that its not the battery, but the owner? Like I need to take it off the charger when its done charging, or it will drain from being plugged in?
 

VapourMonkey

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I have to admit to being more than a little paranoid about battery safety myself after reading some of the Li Ion stories out there. Like everything in life though, there are common sense measures you can take to minimise the risks.
Use the batteries recommended by the manufacturer, charge your batteries on a non flammable surface, never leave them charging unattended for long periods and always check battery condition and charge level before and after you charge them.
If you use a mod, make sure it has at least some venting holes and some protection against a short circuit.

If you have done all the above then i see no point in worrying too much about vaping safety, while you are worrying about that, you may not notice the truck about to run you over ;)
 

gumchewer

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Last year I had an oil change at a place that did it in a jiffy. about 20 miles down the road I stopped an a place and shut down the truck. after five minutes I was back in the truck, hit the key, and BOOM.
The battery exploded. Dented the underside of the hood and everything.
literally blew the top off of the battery.

so I told that story to ask, How big can you make one of those boxes?
 

Sheriff420

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The firewall should be enough to keep you safe from the battery. My dad saw one on the side of the road that blew the hood completely off before catching the fuel line on fire and starting a carbeque. The force from a car battery blowing would require a really thick box to keep it from turning into shrapnel. A explosion containment box wouldn't be worth what it would take to make it effective.

Aluminum doesn't change color when it gets hot. Not even when it is hot enough to melt.
 

ITPython

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Hopefully none of my batteries blow but if they do, I'll have severely reduced damage or maybe no damage due to my explosive containment unit.
The tray has clearance around the sides and top for ventilation and is locked in place securely while the batteries are charging.
The groves in the eGo charger fit perfectly in the slots on the front so it holds the 650mah batterys far enough away from the back of the tray to allow the end caps to blow out if there is a failure.


Very nice, however a problem with charging batteries where you can't see them is that you can't see the green light when they are finished charging. So you might end up letting them trickle charge which is what can cause them to explode if you do it often enough.


Overall good idea though to charge li-ions in a box to help lesson the destruction if they ever do decide to go boom. But it is just as important to make sure you never over-charge them. You should install a nice thick plate of Plexiglas or something to the front of that so you can see the very moment they turn green.
 

tsbrewers

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For anyone considering doing something like this, there are cloth bags designed to do the same thing. They are pretty cheap and work well for controlling the flames, I put my batteries in the charger, then throw the charger in to the bag.

https://www.google.com/search?q=lip...s=org.mozilla:en-US:official&client=firefox-a

Here is a video of one with an RC Lipo battery going off. As you can see, it puts off a lot of smoke but completely contains the flames.

 

Sheriff420

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The video I saw of one of those bags in action had a pretty intense flame shooting out of it.

The guy that had one blow up in his face was using a pipe (according to a newer news story) and I believe it was a home-made deal with stacked batteries (according to some of the threads about it). Still waiting on more info on that one.

I believe the bottom of the box would get warm if there were an issue since the batteries are metal and lay directly on the metal box.
As of right now my batteries stay stone cold when they're charging.

This box and the steel box that I'm going to make were free, I used scrap.

The box plans that I drew up earlier have vent holes just above where the charger wire goes into the box so I'll be able to see when the light is green. The Ego-C batteries are designed to stop charging when they are fully charged. I don't think it would be an issue if the battery were left on the charger for an hour or so after it's done, I check them at least once an hour when they charge.
 

Baldr

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Yeah, nice box and all, but this is a little too cautious (or paranoid). I mean, if you were...perhaps making your own 18650 batteries at home, or some kind of prototype battery, then I wouldn't think it was ridiculous overkill. But 650's, these would do about as much damage as an analog left burning on a wooden table pre-"FSC" paper.

I don't think so.

Electronic Cigarette Battery EXPLOSION!!! - YouTube
 

Baldr

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For what it's worth, the reason I knew about the video I just linked is that I've been watching some videos and doing some research, prompted by the guy who had a PV explode in his face.

Overall, I'm a lot more worried about a battery explosion/meltdown while it's on the charger. That seems to be a lot more common than exploding while vaping.

I've been fairly complacent about charging. My charger was sitting next to my computer (and me) on the desk, and often I would plug one in at night and then go to bed. I'm changing that, being more careful. And I plan to get a lipo charging bag.

Ideally, I think a lipo bag inside of a container would be the way to go. A metal box with an open top would work. I'd be nervous about trying to make it a fully enclosed box. If the thing explodes, it needs an outlet. Trying to fully enclose an explosion is pretty much how you make bombs.

Apparently explosions while vaping pretty much all happen on mods that use stacked batteries, on the first use after charging. That being the case, I'm trying to make it a habit to hit the power button right after I load a new battery, without vaping, to limit damage if it were to happen.

The biggest downside to using a lipo bag in a non flamable box is that you can't easily see the led on the charger. I've actually wondered about modding a charger so you have a long extension wire with the led's, so the led can be visible outside the charging area. It doesn't seem like that should be hard to do, but I could be wrong about that.
 

Demo

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I have to say....that's way over the top. So much fear over 2 exploded batteries out of the millions that are used daily. We don't even know all of the details which, in my cynical opinion, are absolutely necessary before rushing to paranoia; never underestimate how stupid people can be. Whatever helps you sleep, I suppose, but I can't imagine operating on that level of fear. I would never drive, fly in a plane, use a blender, walk outside, drink water, breathe...
 

Butters78

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Here is the prototype of the ecig safety mask made of kevlar.

inner-tube-gimp-mask.jpg
 
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