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Lead Acid battery charger

Discussion in 'Electronic Design' started by Miguel A. Borges Silva, Dec 12, 2003.

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  1. Hello all,
    I'm searching for a company that sells Lead Acid battery chargers but so
    far my search as been a flaw. This is why i'm turning to this newsgroup.
    My problem is that i have a small Lead acid battery (intended to work as
    a backup - 12v) that must be charged for a bigger battery (a 24v truck
    battery). It would be nice if it had a "charge/don't charge" input. As
    far as i know there are lots of chargers to use with 220/120v ac, but
    i've found none for DC.

    Any hints would be apreciated. Thanks in advance.

    With best regards,
    Miguel.
     

  2. Well I don't know exactly what size of battery you are charging, but perhaps
    something as simple as a PB137 might be sufficient:

    http://www.st.com/stonline/books/pdf/docs/6278.pdf

    Mouser sells them in single unit quantities for $0.50. Looks like a very
    simple device. Should be a piece of cake to use (or else a good learning
    experience and nearly first project for any newbie).

    I'm not sure quite what you mean by a charge/don't charge input but perhaps
    a simple mechanical switch or else a MOSFET could be used to turn off the
    charging so it doesn't drain the 24V battery even when the 12V device is
    full, though with an Iq of around 4mA I should imagine it would probably
    take quite some time before it caused problems. Other parasitic loads might
    be more of a concern.
     
  3. I did a google and found this
    http://www.uoguelph.ca/~antoon/gadgets/labc.htm looks like it might just be
    the thing your looking for.
     
  4. PAC8911

    PAC8911

    1
    0
    Jan 27, 2011
    I know this is very old but maybe others arrives here with the same question. I have the same problem and you can find this kind of chargers on

    sorry i can't put links so to bad, but the company is
    MASCOT and POWERSTREAM maybe with thats more thant enouph for you can take a look.
     
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