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Author Topic: My first battery fire! [SOLVED - WORTH READING]  (Read 174 times)

Offline Andy7

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My first battery fire! [SOLVED - WORTH READING]
« on: August 04, 2018, 13:45:16 »
Well.... am I glad I spent a few quid on some LiPo bags!!!!!

4s pack charging away next to me in a bag. I heard a little hiss. Jumped up, unplugged it, ran to the utility room, hissed as I ran, dumped it in a bucket of water where it let let loose hell and fury and thick black smoke.

 :frantic: :frantic: :frantic:

I absolutely DREAD to think what would have happened if I wasn't using a bag.  :sweating:

Going to write a VERY nice review on Amazon.

SO, ALWAYS USE A BAG



« Last Edit: August 04, 2018, 16:50:05 by Andy7 »
ZMR200 | EMAX 2206 2300kv | XSRF4PO(BF) | FatShark Dom V3 | Spedix ES25 | 4S 1300mAh | 5045x3 PC HQ Props | FrSky QX7.
Hubsan X4 107 V2
YouTube: www.youtube.com/user/AndySevern7

Offline ched999uk

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Re: My first battery fire!
« Reply #1 on: August 04, 2018, 15:14:36 »
WOW good job you were next to it as well.
Was it a new one or a used one?
Did it show any damage before?
What brand of lipo bag did you use and did it contain the flames?

What brand of lipo was it as I just bought a couple of really cheap (£18 for 2!) GARTPOT 1500mAh 70C 4S lipos from Amazon?
I am guessing they will be naff but will be ok for me to bimble round and get a bit more stick time.
I am about to charge them for first time!!!!!

Offline Andy7

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Re: My first battery fire!
« Reply #2 on: August 04, 2018, 15:47:15 »
WOW good job you were next to it as well.
Was it a new one or a used one?
Did it show any damage before?
What brand of lipo bag did you use and did it contain the flames?

What brand of lipo was it as I just bought a couple of really cheap (£18 for 2!) GARTPOT 1500mAh 70C 4S lipos from Amazon?
I am guessing they will be naff but will be ok for me to bimble round and get a bit more stick time.
I am about to charge them for first time!!!!!

Battery looked perfectly okay, no damage. Had used it the night before and it was 'warm' afterwards, nothing special, no puff or anything. I ran it down to about 13.5v.

Battery bags here: Just £15.99 for THREE, and they neatly hold 3x 1300mah 4s packs for transport.

https://amzn.to/2vCUWaN

There were no flames coming out of the bag that I could see throgh the thick black and white smoke, though I had dropped it into a plastic bucket of water that happened to be on the service balcony. A little black soot to see on the floor after.

I left it for an hour then took it outside and opened up the bag a little.... just a blackened melted MESS. The bag was practically UNMARKED on the outside. Very, VERY good!

Pack was an Acehie 75c from Amazon which I've been very happy with so far.

It's kinda hot here in Singapore, but not SILLY hot.

I was charging it at 1.0A, which I don't think it a LOT. So, maybe just got unlucky?
Maybe one cell was badly balanced?

One worry I do have about charging in bags in the summer is thermal runaway. Though, my packs NEVER even get warm when I'm charging. But I suppose if they ever DO warm up a litlte, then there's nowhere for the heat to go in a bag...

Still, I'm going to ALWAYS charge in bags without fail. Still a little rattled.
 :blink
ZMR200 | EMAX 2206 2300kv | XSRF4PO(BF) | FatShark Dom V3 | Spedix ES25 | 4S 1300mAh | 5045x3 PC HQ Props | FrSky QX7.
Hubsan X4 107 V2
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Offline Andy7

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Re: My first battery fire!
« Reply #3 on: August 04, 2018, 15:52:44 »
Here's the cheeky chappie!
 :-/

ZMR200 | EMAX 2206 2300kv | XSRF4PO(BF) | FatShark Dom V3 | Spedix ES25 | 4S 1300mAh | 5045x3 PC HQ Props | FrSky QX7.
Hubsan X4 107 V2
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Offline ched999uk

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Re: My first battery fire!
« Reply #4 on: August 04, 2018, 16:25:20 »
WOW they were a decent brand as well. Might be worth a 'chat' session with Amazon. I think they hid the chat but it is somewhere when you look at purchases then help on a specific purchase.

You are charging at way less than 1C so that cont be an issue. As for temp can't really see that as issue either.

Never used a lipo bag but I thing I will invest in a little insurance.

Hope the rest of batts are all good and have a great time flying out there.

Offline Andy7

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Re: My first battery fire!
« Reply #5 on: August 04, 2018, 16:33:18 »
I'm kind of thinking that it may have been bad cell balance now. I wasn't using a balance lead this time, so it's a POSSIBILITY. I'm now thinking 13ish volts is a little low, so one cell could have gone right down.

gonna charge the other one I used last night a little slower and with the balance lead on. I'm going to stop and check every few minutes as well.

If moisture in the air can cause a burn, then I wonder if chucking it in a bucket of water was wise? Though kind of makes sense if it's all gone pear-shaped to have something that's gonna take a load of that energy away quickly.

Yeah, I might have a chat with the makers... forget who the SELLER was, doubt they'll care if they're not the manufacturer.
ZMR200 | EMAX 2206 2300kv | XSRF4PO(BF) | FatShark Dom V3 | Spedix ES25 | 4S 1300mAh | 5045x3 PC HQ Props | FrSky QX7.
Hubsan X4 107 V2
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Offline ched999uk

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Re: My first battery fire!
« Reply #6 on: August 04, 2018, 16:47:08 »
I tend to use cheap batteries and fly down to about 14.4v (constant not voltage sag). When rested for about 30mins they are back to about 14.8/14.9. I then recharge and I put back in about 80% of capacity. I do always balance charge. I also charge pairs of packs at same time (Same brand, capacity, age, same voltage - within 0.1v).

If it was bought through Amazon then have a live chat with them. It is Amazon that you paid therefore the 'contract' is with them!  The info should be in your purchase history. OK so I know batteries are generally consumable but there does sound like you had a faulty one. So try and log it as faulty in Amazons system and see if they will refund or replace.
At least that way you haven't lost a lipo and a lipo bag.
In dealings I have had with Amazon they are generally helpful via chat although it might take quite a while.

Offline Andy7

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Re: My first battery fire!
« Reply #7 on: August 04, 2018, 16:49:29 »
OKAY, I FIGURED IT OUT. IT WAS MY FAULT

I'm actually VERY relieved about this because I was really getting worried about charging my packs here. It's also something that I now know will NEVER happen again.  :sweating:

I suddenly had the idea to look at my other packs for any sign of damage, and found my TWO green packs!

What I'd done was to charge one of Josh's 3S packs as 4S.
Now, this is going to be a VERY rare opportunity to happen, and also almost impossible to happen if I use the balance lead - the charger will KNOW how many cells!

(also, there was only ONE green 3S pack... oops, Sorry Josh!)

LESSON LEARNED! NEVER GONNA DO THAT AGAIN
 :slap:

ALWAYS CHECK YOUR PACKS!
ZMR200 | EMAX 2206 2300kv | XSRF4PO(BF) | FatShark Dom V3 | Spedix ES25 | 4S 1300mAh | 5045x3 PC HQ Props | FrSky QX7.
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Offline ched999uk

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Re: My first battery fire! [SOLVED - WORTH READING]
« Reply #8 on: August 04, 2018, 16:57:09 »
That is quite interesting. So it looks like charging a lipo at too high a voltage will cause a fire!! I wonder if that has caused other fires? Not people accidentally charging a 3S at 4S but a chargers voltage error or fault!!!

Just noticed on a recent thread on another forum someone cutting flying wings had a fire. Someone else commented that they had lipo fire for exactly same reason as you. 3S charged at 4S and no balance lead. So you are definitely not alone.

Great to know you found out why, I was worried that a perfectly good looking battery could catch fire. OK so that is still true but you know what I mean...

You need to go out now for a celebration flight  ::)
« Last Edit: August 04, 2018, 17:01:30 by ched999uk »

Offline Andy7

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Re: My first battery fire! [SOLVED - WORTH READING]
« Reply #9 on: August 04, 2018, 17:09:56 »
Yup. Over-voltage will do it.
Balance lead all the way for me now.  ~~

Well, yeah, I can fly now. I'd decided to ground myself because I was so worried. At least I can Do something about my own mistakes and learn from them.

It's midnight here now.... though that didn't stop me from flying at midnight with the lads here yesterday.... ah, but that's another thread.  ::)
ZMR200 | EMAX 2206 2300kv | XSRF4PO(BF) | FatShark Dom V3 | Spedix ES25 | 4S 1300mAh | 5045x3 PC HQ Props | FrSky QX7.
Hubsan X4 107 V2
YouTube: www.youtube.com/user/AndySevern7

Offline Tryingto

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Re: My first battery fire! [SOLVED - WORTH READING]
« Reply #10 on: August 04, 2018, 17:21:52 »
This is cringe, always balance charge and 13.5v is pretty low!

Glad it didnt end with more than a fright :)

Offline apollo7

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Re: My first battery fire! [SOLVED - WORTH READING]
« Reply #11 on: August 04, 2018, 19:31:41 »
Glad to read the reason for the fire....i use an overlander rc 6 and always connect the balance lead, of course the charger will confirm correct settings for lipo to be charged
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Offline Cheredanine

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Re: My first battery fire! [SOLVED - WORTH READING]
« Reply #12 on: August 04, 2018, 21:31:12 »
This is cringe, always balance charge and 13.5v is pretty low!

Glad it didnt end with more than a fright :)
Agree, too low, whilst racers may do it in a race, I don’t run mine lower than 14v and obviously always balance charge.

 It the safest way is to get a mate to charge them at his place