Lipo fires are a real thing and it's important to take precautions when charging batteries at home.Team BlackSheep have a great Lipo Pouch available.HK-010 Power Analyzer is a great tool for testing your batteries.Common sand is the best way to put out a Lipo fire.This battery bunker is made with 6 cinder block and a sheet of cement board. We chose to put the charger inside to have the ability to charge with the balance connector.Our battery bunker has a smoke detector attached to the cover to alert us if a fire occurs.Utah Flyers Organization has some great information and videos available for Lipo battery safety.Placing the battery in the channel, if the battery catches fire the sand will extinguish the fire.Here's a great article covering details about making an old ammo box into a charging station.These ammo boxes are an option for carrying and transporting your batteries.
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Thanks again for all the help. Flite Test is my "go to" source for information.
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Josh- The salt water method is not a relaible way to discharge lipo batteries.
Best to hook up to a 12v light bulb and make sure the battery is totally drained.
Do this with care (outside, fire safe location), as the battery drops below it's safe charge, it may puff, if it is compromised it may burst.
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Also, do you hav to worry as much if you only have a charger that uses the balance lead like the $10 hobbyking charger?
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After ensuring personal safety, the first thing is to disconnect the power. The second is to ensure that the failing battery is not close to anything that can easily catch fire and if possible move that stuff out of the way. The third is to try and contain it until the reaction stops. Opinions seem to vary about how toxic the fumes are but you want to avoid inhaling them.
It is not clear that sand is the "best way to put out a lipo fire" as the article states. There seem to be different opinions and it could actually be dangerous. At best it is a way to contain the reaction after that fact and stop it from igniting the surroundings but the sand should be dry and you need enough of it to cover the battery with a good heavy layer. At worst the moisture in the sand may react with the failing lipo and make the reaction more intense. Sand will not contain the fumes.
Assuming the battery is disconnected from any electrical power and there is a safe way to move it there seems to be good evidence that putting it a large amount of water will effectively contain the reaction and absorb most of the fumes. The cooling effect of the water may prevent the reaction from igniting other cells in the pack. How large an amount of water is sufficient is unclear but it needs to be enough that it can absorb any increase in the vigor of the reaction and not boil. Having a 50 gallon oil drum full of water for this purpose at a flying field might be useful. Without further quantification it seems too risky to attempt with anything you might have handy at home.
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http://www.amazon.com/gp/product/B008HZUI2A/ref=ox_ya_os_product_refresh_T1
It's hot pink for BCA and was under $20 last month.
It has a latch with a key and a nice handle.
So far I'm very happy with it.
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Hot Pink is of course only for men who are secure in their masculinity..... (c8
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Ammo can, OK. Bunker is better.
I don't think you can beat a cinderblock with a bag of sand on it.
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I think it's time.
I have several metal "safeboxes" I keep batteries in, and a couple silver bags for charging. Been shifting batteries from cash box, to lunch box, to tool box. Bag full of indoor flyer (1S240ish) batteries so I can't charge in it etc. It's been gradually de-evolving as my collection grows and I fly more. I now have 3 chargers (all balancing - I won't compormise on that), probably 50 batteries if you add them all up. And a Ground station with a gawdawful load (8+) of 4S 3700s. Sooner or later, I'm going to screw up and I know it.
Last batch of batteries in, I started a Works Database coding each battery as to Cells, size, and serial number - 3S30-1000-27 is a 1000mah 3S 30c battery and it's my 27th battery. I got a Brother labelmaker at the wholesale store, and it works great on batteries and wiring harnesses. I also mark them with max, min, and stop using voltages. In the data base I note anything bad like crashes, excessive discharge etc. and try to keep track of the approximate number of cycles on it.
I believe ORGANIZATION (can't believe I'm uttering the "WORD") is the key. For me anyway. The bunker will force me not to cheat, and "just charge a couple in on the kitchen table" on the way out. If I make a workstation, I'll use it.
Thanks for a sane approach to a subject people like to go insane over. Nice Video.
Scott
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I have some spare cement board. I plan on making a couple of mini boxes for field charging. Something that will hold the battery instead of an entire charging station would be nice.
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A landscaper dumps his waste at my dad's farm so I have stacks of busted bricks for free. I'm sure I'll get a bunker built out of it. ;) Can't beat free.
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There is the picture : https://drive.google.com/file/d/0B4bI_slD1QrsX1hPWTVBUGlzMXc/view?usp=sharing
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https://youtu.be/s0kzuEpyNyQ
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