can i use a aluminium case for my lipo?

[lifepo4ever]

hi , everyone my bike project is going strong but i want to protect my self and the house from fire and the solution i find is to use a some small aluminum briefcase
so if a lipo fire start i have the time to trow the case outside or if i can't the case will do is job to save also the bike from fire , i am not sure if alumium will melt like butter but i ask the question here before I buy .

 

[Samd]

Lots of us do:
http://www.zhsydz.com/html_products/36V-8AH-aluminum-bottle-cylindrical-lithium-electrical-bike-battery-63.html

 

[dogman dan]

Just make sure your case cannot hold pressure. Some have a rubber gasket. I store my lipo stash mostly in ammo boxes that have a gasket, but I drilled a lot of holes in one end of them. If there is fire, the rapidly expanding gasses won't be contained. I point the holes into my fireplace, so it's a heat resistant place the hot gasses will be directed to.

I put in several new smoke detectors in the house, one right by the lipo, another by the bedrooms.

 

[lifepo4ever]

Just make sure your case cannot hold pressure. Some have a rubber gasket. I store my lipo stash mostly in ammo boxes that have a gasket, but I drilled a lot of holes in one end of them. If there is fire, the rapidly expanding gasses won't be contained. I point the holes into my fireplace, so it's a heat resistant place the hot gasses will be directed to.

I put in several new smoke detectors in the house, one right by the lipo, another by the bedrooms.

ammo box ? is it thicker than a tool box ? because i found one low profile tool box 19'' by 5-6" maybe i can use this and bolt on the bike frame

 

[Philistine]

Whilst it is true that I have Ammo cans holding Lipo on my cargo bike, on all other bikes I prefer cardboard and packing tape. Before reforming my ways and completely ceasing drinking, I had been known to go for the occasional long lunch and then turn color blind in relation to red and black, and think that the reconciliation of positives and negatives might cause a Karmic reconciliation for me. I once caused a 12 storey building (my workplace at the time) to be completely evacuated and the firebrigade to be called due to Dutch courage causing me to believe I could get reds and blacks to live in harmony (like they lived on a keyboard) with a 20S 20AH lipo pack, but those packs lived (sans their balance wires and discharge cables - all sheathing having melted). Those packs still work a treat over 2 years later of continual use. I have never personally seen a lipo fire. I have a mate who rides over 30km a day and has done over 10,000 km on a single lipo pack, bulk charging since day one. He would like to check his cell voltages but his balance wires have all either cut off, broken, or melted off due to random stupidity. He has never seen a lipo fire either.

People get in a tizzy about lipo because they saw some extreme videos on the interwebs. But if everybody lived by that edict they wouldn't even think about trying anal.

Just sayin'

 

[dogman dan]

Yeah, don't get in a tizzy. But don't store your lipo in pressure tight containers either.

The ammo cans are fairly thick steel. So fill one with expanding gasses and it would get entertaining. No worries if your metal box is not airtight.

 

[Drunkskunk]

Don't expect the case to give you time to throw the battery outside, either. Lipo don't burn that way.

I made this video mostly for fun, but it's also an experiment in how Lipo burn so I could build a safer bike. That's a thick cast iron pot. If you watch carefully in the half second before the cell explodes, it vents. the vented gas circles around the cast iron pot, and then when the cell ignites a half second later, it causes the vented gas to explode in what I think is called a thermobaric explosion.

Had I not partially trapped the gas, it would have just burned fiercely like a road flare, but not exploded.

This experiment lead me to 2 conclusions.
1. I needed to contain the cells in an oxygen free container so they couldn't get air. Unfortunately, the cells vent before they burn, and I have no idea how much pressure they can exert. Trying to contain an explosion actually makes the explosion more powerful, so if I got it wrong, my efforts would just make it worse.
2. OR i could get rid of the vented gas as quickly as possible. The video shows the vented gas stays in the pot, instead of rising up, and other videos of lipos venting shows they vent the gas a good distance away, but the gas can become trapped.

So my solution was to build a tight fitting case that protects the cells, but will blow apart if any cell starts to swell, long before any cell vents. That case is built into my bike frame. If a cell starts to swell, the sides, top, and bottom of the battery case will pop off their panels, and expose the battery to as much fresh air as possible. It won't stop the fire, but it will hopefully prevent the explosion.

Keep in mind this is just 1 cell going up. You may have 20-40 cells this size depending on what size battery you go with.

[youtube]NzUla1udKuA[/youtube]

 

[lifepo4ever]

Whilst it is true that I have Ammo cans holding Lipo on my cargo bike, on all other bikes I prefer cardboard and packing tape. Before reforming my ways and completely ceasing drinking, I had been known to go for the occasional long lunch and then turn color blind in relation to red and black, and think that the reconciliation of positives and negatives might cause a Karmic reconciliation for me. I once caused a 12 storey building (my workplace at the time) to be completely evacuated and the firebrigade to be called due to Dutch courage causing me to believe I could get reds and blacks to live in harmony (like they lived on a keyboard) with a 20S 20AH lipo pack, but those packs lived (sans their balance wires and discharge cables - all sheathing having melted). Those packs still work a treat over 2 years later of continual use. I have never personally seen a lipo fire. I have a mate who rides over 30km a day and has done over 10,000 km on a single lipo pack, bulk charging since day one. He would like to check his cell voltages but his balance wires have all either cut off, broken, or melted off due to random stupidity. He has never seen a lipo fire either.

People get in a tizzy about lipo because they saw some extreme videos on the interwebs. But if everybody lived by that edict they wouldn't even think about trying anal.

Just sayin'

its not the first time i use lipo my friend , i use them for about 7 years in my airplane and now my drones hexacopter,quad,octocopter , but the reason i ask the question
its because i never have a lipo fire in my house but i think it worth it to put them in a bunker to limit the risk of burning about 12 x 4s 5000mah!!! and alsmost the same for my 3s lol! so the real question here the material i have to use to reduce the risk if one day a lipo blow in my face

 

[lifepo4ever]

Yeah, don't get in a tizzy. But don't store your lipo in pressure tight containers either.

The ammo cans are fairly thick steel. So fill one with expanding gasses and it would get entertaining. No worries if your metal box is not airtight.

i will drill some hole to hepl venting

 

[lifepo4ever]

Don't expect the case to give you time to throw the battery outside, either. Lipo don't burn that way.

I made this video mostly for fun, but it's also an experiment in how Lipo burn so I could build a safer bike. That's a thick cast iron pot. If you watch carefully in the half second before the cell explodes, it vents. the vented gas circles around the cast iron pot, and then when the cell ignites a half second later, it causes the vented gas to explode in what I think is called a thermobaric explosion.

Had I not partially trapped the gas, it would have just burned fiercely like a road flare, but not exploded.

This experiment lead me to 2 conclusions.
1. I needed to contain the cells in an oxygen free container so they couldn't get air. Unfortunately, the cells vent before they burn, and I have no idea how much pressure they can exert. Trying to contain an explosion actually makes the explosion more powerful, so if I got it wrong, my efforts would just make it worse.
2. OR i could get rid of the vented gas as quickly as possible. The video shows the vented gas stays in the pot, instead of rising up, and other videos of lipos venting shows they vent the gas a good distance away, but the gas can become trapped.

So my solution was to build a tight fitting case that protects the cells, but will blow apart if any cell starts to swell, long before any cell vents. That case is built into my bike frame. If a cell starts to swell, the sides, top, and bottom of the battery case will pop off their panels, and expose the battery to as much fresh air as possible. It won't stop the fire, but it will hopefully prevent the explosion.

Keep in mind this is just 1 cell going up. You may have 20-40 cells this size depending on what size battery you go with.

[youtube]NzUla1udKuA[/youtube]

I like prodigy :lol: nice video but i will like to see one with a ammo box