Lipo explosion....

[pgkevet]

The odd thing is that the rest of the garage has no burn marks, so something expanded fast enough to blow the door off but wasn't hot enough to burn anything else in the room.

Perhaps he's an Italian on a job? "Just blow the bloody doors off" lol

...never leave an rpg next to your lipo charger......

[J-S-Q]

You guys ever watch myth busters, they shove loads of aerosol cans in a fire and it doesn't produce anything near what this has done. I think it's an insurance scam to be honest.

But the only really significant thing that is damaged is the garage door so it doesn't seem like a very clever insurance scam if he's smashed up his garage doors... ...just so he can get a new set of garage doors (oh and a new zippy lipo).

[Jamin_00]

They given him a bashing on the freak for it if you read all the posts after it.

Personally I think the lipo went pop and he knew the mrs would give him a right ol rolicking when she got home so he made out it was really bad by running riot with a sledgehammer and saying he nearly died in it

Just my thoughts lol

[Nick B]

[cjcj1949]

There was a bad fire a few weeks back caused by an msr battery. That surprized me. A 6S 5000mah battery is 300 times as much. Lithium is a very reactive metal.

Not much point in just watching a charger. You have to know what the readings mean. You need a few extra volts on a cell to make it go, I hope and believe. Lets hope we don't have another petrol crisis and have people hoarding petrol in the garage or the house.

Chris

[lankey]

There was a program on the other year (can't remember the name) where they simulated various fire conditions in a typical house. One was a gas leak, and when that bugger went off items with a large resistance (surface area) to the blast, ie doors, walls, windows etc would take a pounding, but other items of small resistance to the blast, cutlery, vases etc would remain unmoved and undamaged. Looks like that sort of explosion.

[alioth]

I doubt it would take a significant overpressure to bend and blow off a typical thin, weak garage door, probably well under 1 PSI would do it. On the aerosol, it depends what was inside of it. For example, some cans with both highly flammable propellant and product could result in a BLEVE (boiling liquid expanding vapour explosion) where the liquid inside is boiling when the can splits and then expands very quickly, perhaps a bit like a fuel-air bomb. If the expanding vapour burns fast enough it won't deposit enough heat into anything to char it (think of dumb teenagers burning their arm hairs off with lighter fluid. The flame lasts such a short time it doesn't burn the skin).

[Planehazza]

It sounds daft, but mine are charged in my bedroom. I only use 2S and 3S packs, and they're in a lipo bag. I only charge them in my bedroom as that's where I am while I'm working on the heli. I never leave them during a charge.

[GravityKills]

>> by hitting them with a pair of shorts from the laundry basket.
this isn't funnys

[SRH990]

A fellow foster carer friend of mine had a similar experience. One of their lads put an aerosol can of deodorant on top of an electric heater, luckily no-one was upstairs when the aerosol can exploded - it blew out the window with chunks of frame & brickwork and blew the internal door off plus blowing a hole through the stud partition wall. The resulting fire did even more damage & they ended up living in a hotel for around a month. Luckily the insurance company paid out, although it got a little tricky when someone burned down his shed......

Do not underestimate the potential danger of aerosols! It's obvious that this is the cause of the extensive damage to the garage, the lipo would just have cased fire & smoke damage, considering it was a 5000 6S lipo i'm surprised how little fire damage there is, maybe the exploding aerosol blew it out!

[Mutley]

Not sure how close the can was to the lipo or the garage ambient temprature, but, i'd say the lipo or the charger warmed up (as normal) which in turn caused the can to warm up, this caused increased pressure inside the can but not enough for it to explode, as a result the seal around the sprayer started to release the vapour from the aerosol into the air, i believe depending on the aerosol this is normally butane based, my guess then is that this built up over time and a source of ignition (maybe the light was on) caused the vapour to explode which in turn cause the aerosol can to explode which in turn too the lipo with it.

My money's on it wasn't the lipo.

[cjcj1949]

I think we need to know exactly waht it takes to make a good lipo explode. I have some old mcx lipos I'll connect up to a powersupply and see how many volts it takes. Perhaps we need a poll on the likely result.

Chris

[bolders]

I think you can be pretty sure that the lipo explosion(if there was one) was not to violent because the lipo is still there. If the bang was big enough the lipo would of been totally destroyed.

I personally dont think we have been given all of the facts here as some things just dont quite add up

[SRH990]

A few years ago I took a single cell from a knackered pack and connected it to a charger with a very long lead well out in our flying field. I charged it as a Nicad and got it over 5V and tight as a drum but it wouldn't explode or catch fire. Subsequently I've found that driving a nail or screwdriver through a cell is the best way to set it off

[Fixxxer]

Yanks are well known for friendly fire..