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HomeAircraftHelicopterMain Discussion › What causes lipo fires ?
02-28-2016 03:31 AM  30 months agoPost 1
ICUR1-2

rrElite Veteran

Ottawa, Ontario

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I hate to bring up old subject, It has been a while and there have been allot of new comers to hobby and thanks to multi rotors ever growing popularity.

I would like to hear from the veterans of the hobby. What they know and do to prevent fires.

such as what rules do you follow if any.

how and where do you store them

equipment used

spending time, paying attention

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02-28-2016 04:30 AM  30 months agoPost 2
mr dan

rrVeteran

Stockton Calif

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One major rule I follow is very simple. I fly 4.5 minutes coming down with 3.8 volts per cell. That being said, I always check my ir readings and should a lipo seem out of sync, I dispose of it. I never fly a pack that has any sign of damage ... Any. Recently a guy on hf asked about flying a lipo that was bent and he felt it could be used because he said it showed even cell count voltage. Storage charge all my lipos all stored in a metal box padded. If I charge in my home, I will charge them inside my fireplace ( worry free ) should a fire erupt... Its in a fire place. Never charge faster than a 2c rate for any of my lipos of any size. New lipos are cycled 4 times at 1amp before use. I use battery buddies on all positve connections while inside my storage case to prevent any risk if a short.

"R.I.P Roman" Citizen 0094 in the Nation

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02-28-2016 12:56 PM  30 months agoPost 3
Busher

rrKey Veteran

Manchester, England

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I have lipos that are upto 10'years old. They are not at their best but they still give good service. I guess this is because I don't hammer them.
I choose the correct rating of lipo for the load being used. For this I use actual real time voltage and current measurement before I commit to flight loads. I don't just use what everybody says works.
I try to never discharge beyond 3.2v
I charge at 1c whenever I can.
Charging any higher gives a better turn around but in my experience shortens the pack life.
I store them in a garage environment in metal containers.
I store them long term at store charge voltage in the metal containers.
I charge them with good quality balance chargers and keep an eye on them as they are charging.
I toss any cells that are puffing or ballooning
I have never had a lipo failure charging or storing as yet but I stay vigilant.
I have used both expensive and budget packs and all have given service that I'm happy with

Simply put most failures / fires seemed to be caused by mistreatment or bad management. That's how it seems at our club anyhow.

Good luck
Busher

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02-28-2016 05:33 PM  30 months agoPost 4
artimus

rrKey Veteran

Buckley WA

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I follow the 80% rule for discharging. Dont discharge more than 80% of the packs true capacity. It keeps my packs happy. I too cycle batterys at a low rate to charge and discharge to condition the packs for a few cycles.ThunderPower recommends this process for their batteries.

Fly Hard......Team Viagra

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02-28-2016 06:32 PM  30 months agoPost 5
RM3

rrElite Veteran

Killeen, Texas - USA

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What causes lipo fires ?
fate and or carelessness...

sometimes they just go up in flames...sometimes the way they are being charged...

only thing to do is plan for the worst and charge/store them accordingly

showing a preference will only get you into trouble, 90% of everything is crap...

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02-28-2016 07:03 PM  30 months agoPost 6
Jerry K

rrKey Veteran

Houston Area

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I never charge at the house! Our field has power and with the newer LiPo's that can be charged at up to 5C there is no reason for ME to charge at the house.

There is a remote posibility I could have an incident from a LiPo in storage but right now I try to stow them after placing a storage charge on them when transporting/storage.

I have my chargers set to a C2 charge rate which is fast enough for me and when setting up I bring out the batterys and place them on charge while I talk and sey up the helis then in about 15 min they are ready for flight. I can charge 3 packs at one tme without parallel charging (which I do not like)

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02-28-2016 07:57 PM  30 months agoPost 7
ICUR1-2

rrElite Veteran

Ottawa, Ontario

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#1 cause is not reading and following the warning stuck to the battery.

Are there any lipo's out there on the market that doesn't have a warning label ?

spending time, paying attention

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02-28-2016 11:18 PM  30 months agoPost 8
mr dan

rrVeteran

Stockton Calif

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Agreed! One thing I noticed is the member who said he takes his lipos down to 3.20 per cell! That would mean he is replacing 90% of capacity NOT GOOD AT ALL! Nominal charge state is 3.70 to take them well below that state is very dangerous.

"R.I.P Roman" Citizen 0094 in the Nation

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02-28-2016 11:43 PM  30 months agoPost 9
Heli_Splatter

rrElite Veteran

USA

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3.2volts/cell? too zealous
3.7volts/cell? too conservative.

I try not to go below 3.5v/c measured in the air under load w/telemetry. That usually works out to 3.7 on the ground-no load, a bit conservative for many.

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03-02-2016 05:17 PM  29 months agoPost 10
JEEPWORLD2002/2

rrKey Veteran

Blue Bell, Pa

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Are there any lipo's out there on the market that doesn't have a warning label
I got a turnigy graphene n it's label is pretty vague. ?

Trex600n,Trex500,MR25,MikadoLoGo5003d/KDE,Goblin 380XNova,CastleCreations,Ys,JR XG8,Tags Mini XBus Dmss//FAA# FA3NYC9TAP

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