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HomeAircraftHelicopterMain Discussion › Lipo volatility myth or fact?
10-08-2012 02:30 PM  5 years agoPost 1
deafheliflyer

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Arizona

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Ive been flying electric helicopters for about four years, and have never had a lipo fire, or even came close.. Im using Hyperion DUO charger and I tend to charge 1c-2c, I measure the IR and keep a lipo log and take care of my packs.

Im curious, are lipos as dangerous as people make them out to be?? I charge mine in a military bullet case and lipo bag and never leave it unattended whilst charging..

Any thoughts/comments? Has Lipos gotten safer due to better chargers and better packs ??

Michael

Crash-Prone and overcoming it!!!

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10-08-2012 02:35 PM  5 years agoPost 2
wrongler

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Brewerton, New York

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I think people are more aware that lipos are dangerous, And they are being a little more cautious!
I have seen them catch on fire in a crash, and also catch fire with a cheapo charger that overcharged the lipo.

Bill Whittaker

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10-08-2012 02:42 PM  5 years agoPost 3
G-Limo

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Europe

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Avoid shorts or case punctures along with your careful charge/discharge regime and you should be OK. But - don't get complacent!!

I think people's awareness of the dangers and power contained in a Lipo has contributed also, but I agree, modern chargers probably have had an influence.

I haven't experienced one go up for no reason. There are lots of videos and stories of fires, but they seem to have been caused due to a failure to observe one of the above precautions.

BTW. I also store Lipos at home in Ammo Cases.

/DG

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10-08-2012 02:43 PM  5 years agoPost 4
Solmanbandit

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Tucson , AZ

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They have the potential to be very dangerous. I can not tell you what the odds are, but it can and occasionally happen. About a month ago, our club president was charging two batteries and they spontaneously went off while charging. Now how old or the condition of the batteries, I can't say, but it did happen. A friend of mine who I know is quite meticulous on his maintenance had a battery burn up while charging at his house for no apparent reason. While in the grand scheme of lipo's it is rare, there is a possibility of going off while charging.

As far as just sitting around, I have yet to hear of a spontaneous combustion of an undamaged battery.

Trex 700E / Trex 500 ESP - Ikon/ HD 500 - Ikon 2/ Goblin 500 Ikon 2

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10-08-2012 02:46 PM  5 years agoPost 5
deafheliflyer

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Arizona

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Makes sense..

Lipos dont generally "Spontaneously blow up" unless charged wrong or there are damaged packs due to crashes and/or cell damage...

Was just curious about lipos because we have truly come a long way in terms of better chargers and better packs...

Crash-Prone and overcoming it!!!

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10-08-2012 03:05 PM  5 years agoPost 6
Steff Giguere

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St-Eustache, Quebec, Canada

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None that I have personally witnessed. We even, on several occasions tried to poke nails in them to only have the batteries smoke with no flames.
I know it happens and we need to treat these batteries with respect to make sure we don' get in trouble.
Just put some in salt water this morning to dispose of them, had never done it before, and was afraid to do so, but everything went as planned.

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10-08-2012 03:21 PM  5 years agoPost 7
Noobyflyer

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Clearwater, FL

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Take it or leave it, but BAD things can happen if a Lipo combusts in an ammo case.

Every once in a while you hear about someone's house burning down from charging a lipo. I guess it's not too bad until your house is an ash heap.

Never leave them unattended while charging. If you have a mishap and one gets bumped, banged, or damaged leave it outside for a day and watch it carefully recharging it the next time......hell, probably not a bad idea to just toss it all together.

Even the pros have been bitten. Curtis burned the shi+ out of himself about a year ago when one was charging and went off. I think he was trying to toss it outside from his barn and it burned his hand pretty bad.

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10-08-2012 03:25 PM  5 years agoPost 8
deafheliflyer

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Arizona

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There are threads on other forums that IF you decide to store in ammo cans, you need to take the rubber seal OFF!!! It needs to be "vented"

Personally, I store mine in Lipo-safe bags INSIDE the ammo can with the seal removed (vented).. storage charged and I check them weekly (to make sure they arent discharging rapidly and also I check the IR again.

Never had issues. But then again, Im not complacent either, Im one of those people that logs every battery into a lipo logger and checks the IR before and after flight.. I can usually tell when a lipo is going bad, I dont take chances with them.

I know bad things CAN happen.

Crash-Prone and overcoming it!!!

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10-08-2012 03:35 PM  5 years agoPost 9
Noobyflyer

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Clearwater, FL

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Yeah, I wasn't trying to treat you like a dumby. You know what you're doing.

Every incident I have read about, there seemed to be something about the user knowing the lipo was "funny" in a way. I don't take chances. I'd rather toss it, then put anyone at risk with my hobby.

One thing I did find interesting that not everyone might know is what the smoke can do. I read about a guy having a lipo smoke in his home. He tried to get it out as fast as he could, but it still let off a lot of smoke. 6 months later, everything that was exposed to the smoke rusted up real bad. I think even the paint on the walls was f'ed.

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10-08-2012 03:41 PM  5 years agoPost 10
unclejane

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santa fe, NM, USA

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It's not so much just LiPo technology, but a general issue with electric, IMO.

Safety is electric's #1 problem. It's far less forgiving of mistakes than fuel, ethanol/nitro in particular. I still have traces of a scar on my right hand to remind me. Any kind of aviation is very unforgiving anyway, but the electric craze really ratchets that up and, in my view, needlessly.

I recently left the hobby after crashing my 700N. I still have my remaining 2 electrics and have found myself uninterested in flying them for the most part. My Whiplash I fly on 6S when I do fly it and my 700N doesn't get too much flying time at all. Hopefully I'll find a local buyer or someone willing to either come here or meet me halfway, etc.

When/if I come back to it, I'm hoping that nitro will still be around. That'll just depend on how long I stay out of it if I ever do come back to it.

But I've bought my last electric...

LS

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10-08-2012 06:36 PM  5 years agoPost 11
rstekeur

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Ft Myers, FL

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I was flying yesterday at the local field and I was watching this guy making some adjustment to his airplane. It was sitting on the bench facing him, he reached over to the radio and by accident pushed the throttle and like a rocket it came straight at him. It hit his DX7 sitting on the table in front of him and cut off the antenna and a switch. If it wasn't for the radio it could have been messy. Batteries like guns, if there in the wrong hands, not good. For someone that knows what there doing no problems.

Even a stopped clock is right twice a day

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10-08-2012 06:49 PM  5 years agoPost 12
GyroFreak

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Orlando Florida ...28N 81W

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This was mine, but only after a serious crash that threw the battery out and punctured the cover. It smoked for 1 or 2 mins before it became like a road flare.
Swollen or damaged LIPOs must be discarded safely, I use a metal bucket of water, let them soak for a lest a week. Add salt to increase the water conductivity if you want.
.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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10-08-2012 08:40 PM  5 years agoPost 13
BobOD

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New York- USA

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I know of 2 people who had them go up many hours after a crash. One of them was a minor bump to the pack...hardly a mark. So, don't assume it takes a major hit or anything. And, the delay is something to note too.
Just don't get complacent. I also have never had one go up....well, not unintentional that is. But, I know it can happen.

Team POP Secret

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10-08-2012 08:57 PM  5 years agoPost 14
Buzzin Brian

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College Station, Texas

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I know of someone that had one go up on him charging and I know for sure that he knows how to charge a battery. So they are not just super safe. Better, maybe. But I think it is more education and better chargers that has slowed the rate that there are accidents with lipos. But I could easily be wrong.

Brian

Build it, fly it, crash it. Repeat as often as needed.

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10-08-2012 09:03 PM  5 years agoPost 15
deafheliflyer

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Arizona

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So to sum up..

Lipos dont "spontaneously burst on its own out of the blue"

1. Charge properly/never leave unattended whilst charging
2. If you crash, fully inspect and make sure packs are good, if any doubt, toss it out!!
3. Store properly
4. always balance charge every time

Feel free to add to the list

Crash-Prone and overcoming it!!!

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10-08-2012 09:15 PM  5 years agoPost 16
BobOD

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New York- USA

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5. Educate

You'd probably be shocked at how many people there are who just do not want to believe what can happen. I've seen teenagers with them stuffed in their closet amongst clothes, books, etc.

Team POP Secret

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10-08-2012 09:31 PM  5 years agoPost 17
chuck nowell

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beaumont texas

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i had a lipo "spontaneously burst on its own out of the blue".it was not on charge or connected to any thing.it was on my work bench and went up.

E-Kavan
trex800
trex700
ma razor600
team visa

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10-08-2012 09:57 PM  5 years agoPost 18
deafheliflyer

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Arizona

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Im sorry that it happened to you..

I would never consider leaving my lipos laying around in my garage especially in Az when the garage can get over 200 degrees..

Storing in a lipo sack/vented ammo box would have not caused that much damage IMHO.

Did it start inside the transmitter? Im looking at the transmitter and it is burned.. Or did it start from a lipo pack? More info please.

Thanks for the photos too, it shows we need not to get complacent with lipos and giving it the respect and caution that it deserves.

Crash-Prone and overcoming it!!!

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10-08-2012 09:59 PM  5 years agoPost 19
Solmanbandit

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Tucson , AZ

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During extreme heat and cold, you want to store your batteries indoors.

Trex 700E / Trex 500 ESP - Ikon/ HD 500 - Ikon 2/ Goblin 500 Ikon 2

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10-08-2012 10:00 PM  5 years agoPost 20
deafheliflyer

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Arizona

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Mine has always been stored indoors LOL.. Like I said, four years and never one issue.. Thats why I started this post to see get comments/feedback

Crash-Prone and overcoming it!!!

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HomeAircraftHelicopterMain Discussion › Lipo volatility myth or fact?
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