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New guy here and need some help on a NICAD battery

Discussion in 'Power Electronics' started by SteveMO, Mar 4, 2012.

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  1. SteveMO

    SteveMO

    3
    0
    Mar 4, 2012
    Hello, I am just a tinkerer and was trying to fix a NICAD rechargeable battery pack for a portable video player. I bought the sub C cells 1.2V and tried to rebuild the pack. While taking apart the old one, a component broke, that I didn't realize was a component until after the fact. What is this pictured and can you buy a replacement?
     

    Attached Files:

  2. Harald Kapp

    Harald Kapp Moderator Moderator

    10,213
    2,201
    Nov 17, 2011
    Hard to recongize.
    Could it be it is not a component but simply a label? If you measure the resistance from the lower left battery through the unknown component to the upper battery, does it show anything more than a short circuit? I'd assume the latter because typically these batteries are connected by welded metal strips. You're probably safe just ignoring this component.

    Harald
     
  3. SteveMO

    SteveMO

    3
    0
    Mar 4, 2012
    It looks like it is made of carbon. It actually split in two pieces and had a black carbon looking material on the inside between the two leads. I ignored it and just jumped a wire between the leads and it works, but the charge drains quickly. It has writing on it, WLD LR180, if that means anything.
     
  4. siggy

    siggy

    36
    3
    Mar 3, 2012
    Follow link and open/ download pdf
     
  5. SteveMO

    SteveMO

    3
    0
    Mar 4, 2012
    Perfect Thank you! Any idea where you can buy those?
     
  6. siggy

    siggy

    36
    3
    Mar 3, 2012
    No idea try the manufacturers website bottom of pdf...they might have retailers etc
     
  7. alfa88

    alfa88

    326
    4
    Dec 1, 2010
    It looks like a thermistor to me. Sort of an overheating protection. I would think you could bypass it as long as you keep an eye on the battery. Even if you knew what it was they sure made it next to impossible to remove.
     
  8. Harald Kapp

    Harald Kapp Moderator Moderator

    10,213
    2,201
    Nov 17, 2011
    Look up polyfuse

    Harald
     
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