Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Results 1 to 25 of 25

  1. #1

    Join Date
    Mar 2002
    Location
    Delray Beach, FL
    Posts
    572
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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 Attached Thumbnails Click image for larger version. 

Name:	Ax72744.jpg 
Views:	4 
Size:	72.6 KB 
ID:	1534232   Click image for larger version. 

Name:	Zx72573.jpg 
Views:	7 
Size:	57.4 KB 
ID:	1534233   Click image for larger version. 

Name:	Sn41542.jpg 
Views:	4 
Size:	38.5 KB 
ID:	1534234   Click image for larger version. 

Name:	Rp44009.jpg 
Views:	5 
Size:	58.8 KB 
ID:	1534235   Click image for larger version. 

Name:	Sn41284.jpg 
Views:	4 
Size:	65.9 KB 
ID:	1534236  

    Click image for larger version. 

Name:	Bg94259.jpg 
Views:	4 
Size:	45.0 KB 
ID:	1534237   Click image for larger version. 

Name:	Zw69460.jpg 
Views:	4 
Size:	72.6 KB 
ID:	1534238  
    Aviation Design USA

  2. #2

    Join Date
    Jul 2007
    Location
    San Jose, CA
    Posts
    2,060
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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
    Courage is what it takes to stand up and speak; courage is also what it takes to sit down and listen.

    Winston Churchill

  3. #3

    Join Date
    Dec 2004
    Location
    Broken Arrow, OK
    Posts
    522
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: dangerous Battery explosion

    Ive never heard of a NIMH exploding. Did you double check the charge setting?
    Dale

  4. #4

    Join Date
    Dec 2004
    Location
    Lisbon, PORTUGAL
    Posts
    1,000
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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


  5. #5

    Join Date
    Nov 2003
    Location
    Martinsville, VA
    Posts
    2,534
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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.
    Scratch it till it bleeds Convert it till it chokes

  6. #6
    pbusa1400's Avatar
    Join Date
    Oct 2005
    Location
    pembroke pines, FL
    Posts
    503
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: dangerous Battery explosion

    Wow!!! That's crazy.
    EliteAerosports.com
    Team Horizon, Thunder Power RC

  7. #7
    AFTERBURNER1's Avatar
    Join Date
    Jun 2003
    Location
    Anaheim Hills, CA
    Posts
    4,379
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: dangerous Battery explosion


    Seen it once in 25 yrs..... Probably a charge setting error...[X(]
    SPEKTRUM
    JETCAT USA

  8. #8

    Join Date
    Feb 2002
    Location
    KALISPELL, MT
    Posts
    542
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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
    BVM REP

  9. #9
    RBardin's Avatar
    Join Date
    Dec 2001
    Location
    Woodstock, GA
    Posts
    408
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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(]

  10. #10

    Join Date
    Mar 2002
    Location
    Delray Beach, FL
    Posts
    572
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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
    Aviation Design USA

  11. #11
    wojtek's Avatar
    Join Date
    Dec 2001
    Location
    nj, NJ
    Posts
    4,104
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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~
    www.facebook.com/allscale
    http://www.shapeways.com/shops/VOY

    - working model MFD & HUD, 3D design & printing, CNC, Laser-cutting
    - Professional-Building
    - Metal-Morph Plating
    - CARF-Models Dealer

  12. #12
    bevar's Avatar
    Join Date
    Sep 2002
    Location
    Lake Worth, FL
    Posts
    3,374
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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

    Team JR,
    Jetcat USA
    Allied Scale Squadron
    The SPT-10 rules!!

  13. #13
    DelGatoGrande's Avatar
    Join Date
    Mar 2004
    Location
    ATHENS, , GREECE
    Posts
    2,607
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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
    Best Regards George
    www.rcjet.gr \"props are for boats\"

  14. #14

    Join Date
    Jul 2004
    Location
    England, , UNITED KINGDOM
    Posts
    2,725
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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

  15. #15
    BaldEagel's Avatar
    Join Date
    Oct 2005
    Location
    Kent, UNITED KINGDOM
    Posts
    9,598
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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
    My Gast is Flabered.
    No matter what anyone say's 100% is the maximum you can get.
    If you see a deleted post, my Avatar say's it all.

  16. #16

    Join Date
    Jan 2002
    Location
    Carrollton, VA
    Posts
    2,074
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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.

  17. #17
    RCISFUN's Avatar
    Join Date
    Apr 2002
    Location
    Erie, PA
    Posts
    5,215
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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...[][][]
    Rich
    The New Jet Central Rhino SP, Cheetah, & Super Eagle owner

  18. #18

    Join Date
    Mar 2002
    Location
    Delray Beach, FL
    Posts
    572
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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
    Aviation Design USA

  19. #19

    Join Date
    Sep 2005
    Location
    McAllen, TX
    Posts
    251
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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!!!

  20. #20
    nonstoprc's Avatar
    Join Date
    Sep 2003
    Location
    Central, TX
    Posts
    2,405
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: dangerous Battery explosion

    I always use nicad packs. Never had an explosion incident. The charger is the Sirius Charger.
    Where facts are few, experts are many.
    Perfection is God\'\'\'\'s business.

  21. #21

    Join Date
    Nov 2004
    Location
    Escondido, CA
    Posts
    209
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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.

  22. #22

    Join Date
    Nov 2003
    Location
    Martinsville, VA
    Posts
    2,534
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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.
    Scratch it till it bleeds Convert it till it chokes

  23. #23
    GrayUK's Avatar
    Join Date
    Oct 2003
    Location
    Dunstable, UNITED KINGDOM
    Posts
    3,582
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: dangerous Battery explosion

    never had one go ...ever.
    no one told you when to run...

  24. #24

    Join Date
    Dec 2004
    Location
    Harpenden, UNITED KINGDOM
    Posts
    118
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    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

  25. #25
    RCISFUN's Avatar
    Join Date
    Apr 2002
    Location
    Erie, PA
    Posts
    5,215
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: dangerous Battery explosion


    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 Attached Thumbnails Click image for larger version. 

Name:	Wt59289.jpg 
Views:	3 
Size:	174.0 KB 
ID:	1535568  
    Rich
    The New Jet Central Rhino SP, Cheetah, & Super Eagle owner


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 07:33 AM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.