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HomeAircraftHelicopterHelicopter Main Discussion › Serious Battery Fire
02-23-2016 07:13 PM  32 months agoPost 41
Aaron29

rrProfessor

USA

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What, the Boston Marathon wasn't bad enough and someone wants to bring that to the field?

Anyone who brought that to my field and set a LIPO in it, I'd leave immediately and call the police.

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02-23-2016 07:15 PM  32 months agoPost 42
Calil

rrApprentice

Brazil

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I'm not saying you should, I'm saying I have seen.

I use the ammo box and it wouldn't explode if the lipos catch fires, it dont hold pressure.

People can use whatever they want, just sharing information.

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02-23-2016 07:20 PM  32 months agoPost 43
Aaron29

rrProfessor

USA

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People can use whatever they want
Not a pressure cooker. I'm turning them in.

There's a criminal level of ignorance at that point. A pressure cooker has been used to kill and maim in recent history. And the attack got very large media coverage, so it's not like anyone can claim ignorance. Ultimately, anyone not knowing what a pressure cooker can do when it is not used for it's intended purpose is too stupid to share the pilot station with.

There is a criminal level of stupid. I'd leave and call the cops. "Hello, 911? A guy at our park is putting dangerous devices inside a pressure cooker." I bet the cops would be there before the charge ended.

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02-23-2016 07:29 PM  32 months agoPost 44
Calil

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Brazil

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Again: In their home, they can use whatever they want. If they should, that's another history. On the field, I have never seen pressure cooker, only in some guys homes.

I dont use it, my ammo box does not have the rubber to do the vedation, so it would smoke the place but set catch fire on my home. At least that's what I expect.

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02-23-2016 07:31 PM  32 months agoPost 45
Aaron29

rrProfessor

USA

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The ammo can with ability to vent a little is one thing. A pressure cooker is entirely different. I'm not faulting you, but if you've seen it at someone's house, I'd unfriend that person. They will one day get you hurt.

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02-23-2016 07:33 PM  32 months agoPost 46
Mike0251

rrVeteran

Hills of the Blue Ridge VA

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I use an ammo can with the lid left just resting, not latched. But, like some have said there are multiple batteries in there.
Last year I had a 5S that starting swelling. So off to the burn area outside and put a .22 thru it. What I usually do..lol. It did not catch fire but it put off the most horrendous smoke cloud with much ferocity (like a military grade device) for at least 5 min. And it was the absolute worst poisonous chemical cloud that I was ever around. That being said, if this was in an ammo can in your house, it may have prevented fire, but every animal/pet would be dead and the stench left on everything would be never ending. So basically if you have an event, it's not gonna be good. Sorry I ever got involved in electrics and will be glad when I sell them all.
Interesting enough, after this came out I moved my two ammo boxes this morning into the garage on the concrete floor, cold weather or not.

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02-23-2016 08:26 PM  32 months agoPost 47
MattJen

rrElite Veteran

UK

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since my fire I use the Ammo box and it has vent holes..

my battery was a new optipower 2 cell, I had flown it the day before and charged it up but I was going away on holiday so I wanted to do a storage charge..

I hadn't got enough leads so I used a multiple charge/Balance board, I feel this is where the problem was and was the cause of my fire as when I first connected I got connection error come up on the charger I disconnected and reconnected and all seemed fine..
the problem was exasperated by the fact my wife shut the shed door so no one heard the fire alarms going off.. and the fact I was not there..

Mine was a moment lax in concentration, the phone went in the house I was on the phone for 30 mins and then realised I was now late for a work appointment so I rushed off completely forgetting.. I had got away with it before and I had never had a lypo explode or catch fire so I thought it could never happen to me..

as they say in full size events it is normally a chain of events that culminates in an accident..

mine was like that complacency, warning signs of connection error not adhered to, phone going off, under pressure, = forgot = fire.

I've learned a lot from it and many have used my videos even fire brigade use it as training as they could not believe the power in these lypos, it took seconds to go from a smoke and spark to a raging fire..

All The Best

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02-24-2016 12:31 AM  32 months agoPost 48
sean911sc

rrVeteran

San Diego

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IMHO the issue isn't with storing batteries, but the lack of following the proper safety rules during charging or handling damaged Lipo's. Its known that leaving lipo's unattended during charging is a bad practice, but it happens time and time again. People continue using when damaged or appear minimal - slight swelling. I recently disposed of all lipos older than 6 months. Even some that were brick hard. I opt for newer packs and treat them differently than before. Lipos demand a high degree care and respect.

William S Harris

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02-24-2016 01:10 AM  32 months agoPost 49
Eco8gator

rrElite Veteran

Palm Beach, FL

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Was he in the same room as the battery when it was charging?

Just a reminder to all of us...NEVER LEAVE YOUR BATTERIES CHARGING UNATTENDED...

Xera Motors
ProBar
Minicopter
Thunder Power

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02-24-2016 08:30 AM  32 months agoPost 50
Calil

rrApprentice

Brazil

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02-24-2016 08:32 AM  32 months agoPost 51
Calil

rrApprentice

Brazil

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02-24-2016 01:46 PM  32 months agoPost 52
Pistol Pete

rrProfessor

Seffner, FL

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Someone here asked...

http://www.rcgroups.com/forums/showthread.php?t=329744

Given it's dated 2005 but it happened based on his account.

Those pondering on a ammo box, my 1st post has links with videos as well as other elaborate means to "suppress" such. Youtube is not short on the topic either.

Bottom line...something_is_better_than_nothing.

Given all the warnings and info available, lipo technology, smart chargers, balance plugs, lipo alarms, smoke detectors, prescribed glasses etc...you would think it should not happen but...

4,067 days LiPo accident free.

~~Enjoying the hobby one flight at a time~~

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02-24-2016 02:03 PM  32 months agoPost 53
Nashville

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Formerly Music City now back home in Sunny Florida

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Sorry for the late reply, I was traveling. He was using a nice Thunder Power charger, I don't know the exact model but it was a quality unit. Maybe a couple of years old, but not heavily used. The Pulse 2200 battery had 12-13 total charges. He never charged at more than 1c. It had been sitting discharged for several months and had no puffing. The battery was probably close to two years old tough. He only flew his helis once every few months as he's been heavily into quads/drones the past couple of years. One good thing is he opened his trunk and had forgotten he loaded up his Inspire 1 the night before with the case and all batteries. So at least he saved one nice thing.

I was Spektrum when Spektrum wasn't cool

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02-24-2016 02:37 PM  32 months agoPost 54
MartyH

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USA

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Thanks to stories being shared like this most recent one for example, my LiPo's are always outside unless they are being stored. In other words, if I'm doing anything with a LiPo, it comes out of the ammo can (I will drill a vent hole in the can) and goes outside on the charger. The charger is powered by a 120V power supply running on a 12V battery so it is completely isolated from household electric. The worst it can do is burn up my new 1/4 scale airplane runup table this is all sitting on.

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02-24-2016 02:40 PM  32 months agoPost 55
Aaron29

rrProfessor

USA

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What was the voltage in each cell before charge?

Did the charger display proper cell type and count? Even smart chargers can be fooled.

Was he tracking internal resistance values? It was a new battery cycle wise. But maybe had a bad cell from get go. Did he by chance get IR readings?

Surely something could have clued him that the battery was bad.

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02-24-2016 03:48 PM  32 months agoPost 56
Nashville

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Formerly Music City now back home in Sunny Florida

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He said there was no sign that there might have been a bad cell or cells. The charger did not indicate any issues. He said he was just doing a typical charge to a battery that he assumed was in normal working condition. I don't even know what checking internal resistance issues means and I doubt he was doing whatever that is. He's a very bright, experienced rc pilot, over 10 years experience with lipos, and he said he had no reason to think there was a problem with the battery. I do know he is quick to destroy (we go out in the back and shoot the bad batteries) problem or damaged batteries. He was not in the garage when the battery blew, so there possibly could have been some indication of trouble from the charger but he did not hear anything before he smelled the smoke and started trying to put out the flames, to no avail obviously.

I was Spektrum when Spektrum wasn't cool

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02-24-2016 07:36 PM  32 months agoPost 57
sean911sc

rrVeteran

San Diego

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I now set all my chargers to charge each cell to 4.18v opposed to 4.20. Charge at 1.5C or 2C, monitor individual cell voltage and battery temp. Might go with 4.15v per cell.

Upgraded old chargers as they lacked the current electronics/software to monitor battery performance compared to newer chargers (TP610C to TP820HVC).

William S Harris

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02-25-2016 03:01 PM  32 months agoPost 58
Jeff polisena

rrElite Veteran

westpalmbeachflorida usa

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Attended or not don't charge where things can burn fast . I lost my house few years back . I was attending the charge and when done I unplugged battery from charger and left on shelf . I left my house and about 40 min later I got call from 911 my house was on fire . Lost my dog and house but wife and kids not home .

I stole it ,flew it and gave it back ;)

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02-25-2016 03:25 PM  32 months agoPost 59
Ronald Thomas

rrMaster

Gainesville, Fl, USA

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In regards to the DJI battery. The video says it was in from a customer and that it tested at 5 volts.
The Phantom's use 3s lipos, so testing at 5v means it was dead beyond repair. I am suspicious of this battery just going off like that. It was most likely either damaged or abused recently (hence the reason the customer sent it in for repair).
To this date I haven't heard of a lipo just spontaneously combusting that wasn't previously damaged in some fashion. Your well-maintained and proper-voltage lipos are just fine sitting there.
Yeah, when the guy walked over to the bench, he looked like he had to unattached it rather then just grab it and go outside with it. He also did the worst thing when trying to extinguish it, he dropped it on the ground and started stomping it, thereby releasing even more energy.
A dead lipo does not have that type of energy, a charged or charging one does. I bet they tried to bring it up and it failed....

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

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02-25-2016 04:37 PM  32 months agoPost 60
jschenck

rrProfessor

La Vista, NE.

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Jeff and Matt - I still remember reading both your stories, feel for you. I hope you both have been able to put it behind you - tough situation.

One of the guys in our club took an old refrigerator and turned it into a lipo storage device. Drilled a 2" hole in the top of it and connected PVC pipe to it, venting to outside his house. All lipo's kept in there.

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HomeAircraftHelicopterHelicopter Main Discussion › Serious Battery Fire
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