short-circuiting of a battery for a long time...

Discussion in 'General Electronics Chat' started by swarn kamal, May 5, 2009.

  1. swarn kamal

    Thread Starter New Member

    May 5, 2009
    3
    0
    Hi.... I wana ask that, what would happpen if I short-circuit a battery for a long time???
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,638
    2,343
    Hello,

    That depends on the type of battery.
    There are batteries that wil get hot.
    There are even batteries that will explode like lithium types.
    For more information take a look at the links on this page:
    http://www.educypedia.be/electronics/componentbattery.htm

    Greetings,
    Bertus
     
  3. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Most of them, if not all, will get destroyed.
     
  4. gerty

    AAC Fanatic!

    Aug 30, 2007
    1,153
    304
    Or, if it's a big high current battery and you use a small wire, the wire will burn.
     
  5. Darren Holdstock

    Active Member

    Feb 10, 2009
    262
    11
    As a child I abused my train set transformer that way - top fun making my own brief-lived light bulbs, but it didn't do my transformer any favours, and it buzzed horribly thereafter.

    Short a battery and it (assuming it doesn't explode and/or catch fire) what you'll get is a flat battery. But one time I did have a situation where I came across two cells connected in series to a load, and the load had shorted. One cell was very flat, and held a small positive voltage, while the other cell had flipped polarity and was showing a small negative voltage.
     
  6. GooglePlex

    New Member

    May 14, 2009
    2
    0
    This is really dangerous, as cjdelphi said if you don't have any resistance it's possible that the battery could explode.
    I would not try this at home, please.
     
  7. bobbyrae

    Active Member

    May 14, 2009
    42
    1
    There was an episode of Breaking Bad (on AMC) where the star of the show used a squeegee to short the battery terminals on a BMW. It burst into flames a few seconds later. Frankly, I just don't believe that would happen. They can explode, but it is very rare as you have to generate some Hydrogen gas AND have a spark right there at the same time AND this is pretty much impossible on an AGM battery (which is getting much more common).
     
  8. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,170
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    Discharging thru a load and then shorting terminals is an approved long term storage method for NiCd batteries.
     
  9. David Bridgen

    Senior Member

    Feb 10, 2005
    278
    0
    I did some work on satellite electronics. We built a charger/discharger for one satellite's NiCd battery. During discharge the voltage of every cell was monitored. When its voltage reached 1, a short was placed across it.
     
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