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Make a cordless drill battery holder?

Discussion in 'Electronic Basics' started by John Doe, Jul 5, 2007.

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  1. John Doe

    John Doe Guest

    I must make a cordless drill battery holder and I'm asking for help
    with the design.

    I can't hack the batteries because they must fit into the charger and
    they might be used in cordless drills too.

    How would you temporarily connect electrodes to the two battery
    terminals? Mine are shaped like typical cordless drill batteries with
    a cylindrical upper body that has a metal contact plate on each side
    of the top of that cylinder.
    (the two side terminals, the other two terminals are used for

    I suppose some nonconducting springy material could be used for
    clamps. Any premade store-bought stuff that might fit?

    Thank you.
  2. Lord Garth

    Lord Garth Guest

    You be best served if you bought a new pack and hacked the old one.
    You'd be sure to have the proper fit for the contacts by doing so.
    Otherwise, that pack will be spent in about a year or can
    hack it at that time unless you are going to rebuild it.

    Are you trying to connect it to your vehicle?
  3. Tom Biasi

    Tom Biasi Guest

    I use cordless drill batteries to launch rockets.
    I made a holder by molding two part wood putty around the battery and
    fabricating contacts. It works great.
    If you make a mold remember the battery has to come out. Don't trap it. Make
    sure there are no dimension smaller than the battery as you go up and out.
    If your application is a one time event you could just solder wires to the
    terminals. The solder can be wicked off later.

  4. Lord Garth

    Lord Garth Guest

    I'd be willing to help you modify one but no, I'll not be making a gift
    of anything.

    So why 3 packs? Just what are you trying to accomplish?
  5. ehsjr

    ehsjr Guest

    For one time use (meaning you need to set it up
    each time - you can't just pop batteries in and out)
    you can make a contact assembly with PVC pipe and
    screws and nuts.

    Get PVC pipe that just goes over the nearrow end of the
    pack that has the contacts. Use screws and nuts to
    contact the battery, like this:

    {****} <--Screw
    [||] <--Nut
    ===============||=== <--PVC pipe wall
    [||] <--Nut
    Battery __ |
    --------------- --
    [||] <--Nut
    ===============||=== <--PVC pipe wall
    [||] <--Nut
    {****} <--Screw

    You have to insert the battery and then tighten the
    screws onto the battery contacts.

    For a more permanent (ie batteris can be popped in and
    out) setup, again you start with PVC pipe. Make
    brass strip contacts:

    H ______P
    ------ /
    \__/< this part sticks through the PVC "window"

    Cut "windows" in the PVC that line up with the contacts
    on the battery when it is inserted into the PVC pipe.
    A hose clamp holds the contact onto the outside of the
    PVC pipe at location H.

    A small section of larget PVC pipe slides to point P,
    pushing the brass strip down into the window in the
    smaller PVC pipe.

    You can whittle small pieces out of PVC pipe that
    can be glued inside the small pipe to keep it properly
    aligned as it is inserted onto the battery.

  6. z

    z Guest

    Duct tape, or equivalent. Remove with razor blade, or equivalent.
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