RC Jets Discuss RC jets in this forum plus rc turbines and ducted fan power systems

dangerous Battery explosion

Reply
Old 12-14-2010, 03:24 PM
  #1
Malcolm Kay
Thread Starter
 
Join Date: Mar 2002
Location: Delray Beach, FL
Posts: 594
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default dangerous Battery explosion

I had a nasty experience today take note . it could have been worse.... I was in my shop I had been doing routine maintenance to my Top Flight P47 just checking everything before flying tomorrow, and decided to charge the batteries, I charged the the flight pack a Life 6.6 volt first ..I use a Bantam 6 charge station with an octopus charge lead ( multiple sockets for different types ), the charge was completed successfully and the the charger disconnected, I then proceeded to charge the ignition battery a six volt NMH I set the charger to the type and pressed the start button and the charge started in the normal way.. I then left the shop to join my family for lunch. During lunch 30 minutes or so later there was a loud bang ! like a gunshot or a 12 gauge being fired, I went into the shop and couldn't see anything wrong at first glance,..... then i noticed a gaping hole in the side of the fuse of the P47 with smoke residue whisping out of the hole ! As i looked around I noticed a gaping hole in the side of the fuselarge of my giant Fei Bao T33 which had been sitting on the table next to the P47 ........ Damn...the NMH battery located in the fuse of the P47 had exploded on charge and blown one cell straight through the side of the Thunderbolt and propelled it straight through the T33, three or four feet away, and lodged inside ! two birds shot with one shell ! the damage is repairable but what are the odds of that happening ? Here are some pictures to illustrate the disaster and in future I am definately going to arrange my installations so that I can take any battery out to charge it...a lesson learned the hard way..... and it could have been worse , I always drain my tanks when I get home mainly to eliminate smells etc , but imagine if the tank had been left with gas in it ! don't go there !.....MK ....................ps pix would not load due to server problem
Attached Thumbnails
Click image for larger version

Name:	Ax72744.jpg
Views:	9
Size:	72.6 KB
ID:	1534232   Click image for larger version

Name:	Zx72573.jpg
Views:	12
Size:	57.4 KB
ID:	1534233   Click image for larger version

Name:	Sn41542.jpg
Views:	14
Size:	38.5 KB
ID:	1534234   Click image for larger version

Name:	Rp44009.jpg
Views:	9
Size:	58.8 KB
ID:	1534235   Click image for larger version

Name:	Sn41284.jpg
Views:	8
Size:	65.9 KB
ID:	1534236  

Click image for larger version

Name:	Bg94259.jpg
Views:	8
Size:	45.0 KB
ID:	1534237   Click image for larger version

Name:	Zw69460.jpg
Views:	7
Size:	72.6 KB
ID:	1534238  
Malcolm Kay is offline  
Reply With Quote
Old 12-14-2010, 03:28 PM
  #2
jmohn
 
Join Date: Jul 2007
Location: San Jose, CA
Posts: 2,060
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

I have always pulled my batteries out of my planes while charging, but I juse LiPo packs so they need to be pulled out.

Too bad about your two planes. That's a good safety tip that many people dont think of. Maybe a little fan blowing air in the plane would have helped too.


Jeff
jmohn is offline  
Reply With Quote
Old 12-14-2010, 03:35 PM
  #3
ddlstang
 
Join Date: Dec 2004
Location: Broken Arrow, OK
Posts: 522
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

Ive never heard of a NIMH exploding. Did you double check the charge setting?
ddlstang is offline  
Reply With Quote
Old 12-14-2010, 03:48 PM
  #4
jetnuno
 
Join Date: Dec 2004
Location: Lisbon, PORTUGAL
Posts: 1,051
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

A NiMh Exploding????

This is really odd.... That is why I changed all batteries to lipos - safety issues

Was your charger set-up the right way?

A little work and you'll be ready to go again[8D]

Regards

Nuno

jetnuno is offline  
Reply With Quote
Old 12-14-2010, 04:06 PM
  #5
hooker53
 
Join Date: Nov 2003
Location: Martinsville, VA
Posts: 2,539
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

Hey Malcolm, sorry to see this man. Guess it could have been worse though. glad it didn't do any worse than it did. I'v never seen this with a Nic. I do have to admit, I'v always trickle fed my batts and they have never even felt warm. Hate to see that t-33 eating a mortar like that. Thats one of my Fav birds and hope to have one someday!!! Now you have some winter buiding to do!!! Ha.
hooker53 is offline  
Reply With Quote
Old 12-14-2010, 04:06 PM
  #6
pbusa1400
 
pbusa1400's Avatar
 
Join Date: Oct 2005
Location: pembroke pines, FL
Posts: 513
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

Wow!!! That's crazy.
pbusa1400 is offline  
Reply With Quote
Old 12-14-2010, 05:02 PM
  #7
AFTERBURNER1
 
AFTERBURNER1's Avatar
 
Join Date: Jun 2003
Location: Anaheim Hills, CA
Posts: 4,424
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion


Seen it once in 25 yrs..... Probably a charge setting error...[X(]
AFTERBURNER1 is offline  
Reply With Quote
Old 12-14-2010, 05:55 PM
  #8
Kelly Rohrbach
 
Join Date: Feb 2002
Location: KALISPELL, MT
Posts: 678
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

I had nicads do just about the same thing on me a few years ago. What we think happened was charging an almost full pack (just wanted to top it off from the day before) this was with a field quick charger and it just did not have enough room in the pack to absorb the high delta peak charge early in the charge cycle.
Kelly Rohrbach is offline  
Reply With Quote
Old 12-14-2010, 06:20 PM
  #9
RBardin
 
RBardin's Avatar
 
Join Date: Dec 2001
Location: Woodstock, GA
Posts: 452
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

Maybe time for a new charger?!

I'm using a Bantam BC6DX II From RC Accessory. Works great.

I'd be afraid of a "repeat performance" with the same one...[X(]
RBardin is offline  
Reply With Quote
Old 12-14-2010, 07:20 PM
  #10
Malcolm Kay
Thread Starter
 
Join Date: Mar 2002
Location: Delray Beach, FL
Posts: 594
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

thanks for the comments guys but I always set the charger at 1.5 for the nickel metal hydrides, I have never charged them at the higher rates and this was a battery that had at least 50 cycles , its been in the plane for almost a year.. the charger seems to be ok , I tested on two other batteries without a problem.. last time I used the plane i had three flights about a week ago, and I hadn't charged since then.. i guess you hafta chalk it up to experience and move on.....MK
Malcolm Kay is offline  
Reply With Quote
Old 12-14-2010, 08:00 PM
  #11
wojtek
 
wojtek's Avatar
 
Join Date: Dec 2001
Location: nj, NJ
Posts: 4,208
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

I had a NiMh blow like that inside of a plane a long time ago! . weird .. . I did not know until i could not figure out why I could not either turn on the power, or charge the battery .. I figured it died, but it had blown up, looking very similar to the pics here .. In my case the battery went while the plane was off, not being charged, and sitting on a shelf in my garage ... this thread is a good reminder, especially as i had just today left a NiMh getting zapped at a high amp rate unattended inside my sons car ...


~V~
wojtek is offline  
Reply With Quote
Old 12-14-2010, 08:30 PM
  #12
bevar
 
bevar's Avatar
 
Join Date: Sep 2002
Location: Lake Worth, FL
Posts: 3,424
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

Yikes!

Malcolm...glad the damage was not worse Mate. I have never seen a Nimh go off like that...only Li-Ions (once...Johnny's T-33 after it high dived at FJ one year).

It's a good lesson for us all about unmonitored charging. Better be careful...

Beave

bevar is offline  
Reply With Quote
Old 12-14-2010, 11:51 PM
  #13
DelGatoGrande
 
DelGatoGrande's Avatar
 
Join Date: Mar 2004
Location: ATHENS, , GREECE
Posts: 2,790
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

fake

a p47 wont even come close to a t33

Malcolm, sorry to see this...i have never see that again...i would bin the charger my 2c
DelGatoGrande is offline  
Reply With Quote
Old 12-15-2010, 12:01 AM
  #14
bigplumbs
 
Join Date: Jul 2004
Location: England, , UNITED KINGDOM
Posts: 2,725
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

I charge a lot of my batteries in the plane. With many installations it is offten quite difficult to get them out to charge

Dennis
bigplumbs is offline  
Reply With Quote
Old 12-15-2010, 12:34 AM
  #15
BaldEagel
 
BaldEagel's Avatar
 
Join Date: Oct 2005
Location: Kent, UNITED KINGDOM
Posts: 9,635
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

Had a Nimh go in my Tx pack, blew the back door off, but what was interesting is that the heat distorted the battery tray inside the Tx, that's the problem with high capacity high resistance Nimh cells, I now charge with the temp sensor outside the Tx, on the Rx side I use A123's and leave them insitu, no problems yet and when tested outside the airframe no heat issues either.

Mike
BaldEagel is offline  
Reply With Quote
Old 12-15-2010, 10:08 AM
  #16
JeffH
 
Join Date: Jan 2002
Location: Carrollton, VA
Posts: 2,261
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

We had a guy at the field that had a NiMh go off all by itself. The plane was just sitting in his stand and BOOM, right through the bottom of the plane went one cell. The remains of the battery then set the foam inside the plane on fire. Luckily, he had just finished putting the wing on and had flipped it back over upright in the stand and walked away, otherwise it would have hit him in the chest/neck area.
JeffH is offline  
Reply With Quote
Old 12-15-2010, 12:24 PM
  #17
RCISFUN
 
RCISFUN's Avatar
 
Join Date: Apr 2002
Location: Erie, PA
Posts: 6,098
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

Consider yourself lucky that was the only damage, about two months ago my buddy was charging the flight pack on his quickie 500 racer for the Sunday morning race, it was an hour or so before the event so he decided to charge his NiMh pack on high rate. His racer was in a detached garage along with his Boomerang Jet , Car and other garage type items, he went into his house to eat breakfast when he heard an explosion, he went out side to find his garage fully involved in a fire....he lost everything!!! His Jet Central Super Bee was melted beyond recognition...[][][]
RCISFUN is offline  
Reply With Quote
Old 12-15-2010, 02:38 PM
  #18
Malcolm Kay
Thread Starter
 
Join Date: Mar 2002
Location: Delray Beach, FL
Posts: 594
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

WOW !!! Rich. that makes you think !! I.m never to old to learn something that might save a big problem .. prevention is better than a cure ......I am never using cells that can blow again .. it's A123 .s in everything from now on..... chemical reaction batteries must be safer........my garage is internal if that goes boom my house goes with it !!! MK
Malcolm Kay is offline  
Reply With Quote
Old 12-15-2010, 03:48 PM
  #19
kurt2022
 
Join Date: Sep 2005
Location: McAllen, TX
Posts: 254
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

HYDRO-TRASH,(hobbico) the worst batteries I have ever had the misfortune to buy!!! Buy tenergy, they are cheap but reliable!!!
kurt2022 is offline  
Reply With Quote
Old 12-15-2010, 05:38 PM
  #20
nonstoprc
 
nonstoprc's Avatar
 
Join Date: Sep 2003
Location: Central, TX
Posts: 2,452
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

I always use nicad packs. Never had an explosion incident. The charger is the Sirius Charger.
nonstoprc is offline  
Reply With Quote
Old 12-16-2010, 12:12 AM
  #21
paulsf86
 
Join Date: Nov 2004
Location: Escondido, CA
Posts: 271
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

Hydrimax Nimh(Hobbico) are some of the best batteries I have ever used. Like all batteries, don't abuse them and they will treat you very well for a long time. Good luck getting replacement on Chinese batteries if one is bad when you get it. Shipping it back will cost you twice the price of the battery not to mention the lost time.
paulsf86 is offline  
Reply With Quote
Old 12-16-2010, 02:32 PM
  #22
hooker53
 
Join Date: Nov 2003
Location: Martinsville, VA
Posts: 2,539
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

I order ALL my batts from Dave at Radical. Best batts I have ever used and if one goes bad you can bet he will stand behind it!!! In fact I getta order some in the next little bit.
hooker53 is offline  
Reply With Quote
Old 12-18-2010, 02:02 AM
  #23
GrayUK
 
GrayUK's Avatar
 
Join Date: Oct 2003
Location: Dunstable, UNITED KINGDOM
Posts: 3,598
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

never had one go ...ever.
GrayUK is offline  
Reply With Quote
Old 12-18-2010, 03:20 AM
  #24
Roger M
 
Join Date: Dec 2004
Location: Harpenden, UNITED KINGDOM
Posts: 121
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion

This attached thread is interesting and shows that some of the larger capacity NiMh batteries can potentially be a problem. It doesn't look like you were the only one Malcolm[]

http://scalesoaring.co.uk/yabb/yabb2...1236112426/459

Roger
Roger M is offline  
Reply With Quote
Old 12-18-2010, 04:40 AM
  #25
RCISFUN
 
RCISFUN's Avatar
 
Join Date: Apr 2002
Location: Erie, PA
Posts: 6,098
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: dangerous Battery explosion


Quote:
ORIGINAL: Malcolm Kay

WOW !!! Rich. that makes you think !! I.m never to old to learn something that might save a big problem .. prevention is better than a cure ......I am never using cells that can blow again .. it's A123 .s in everything from now on..... chemical reaction batteries must be safer........my garage is internal if that goes boom my house goes with it !!! MK

Here is the Newspaper photo of my buddies garage fire that will make you think about unattended charging...
Attached Thumbnails
Click image for larger version

Name:	Wt59289.jpg
Views:	8
Size:	174.0 KB
ID:	1535568  
RCISFUN is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 05:49 PM.