Connect with us

LABCO PS243 - Charging the battery

Discussion in 'Electronic Repair' started by benitos, Sep 5, 2012.

Scroll to continue with content
  1. benitos

    benitos Guest

    Hi ,

    Having this power supply to provide 12V (with a back up battery).

    The battery seems to be connected in // with the 12VDC output.

    It doesn't seem to charge it. Do I need more than 12V to charge it ?
  2. Sjouke Burry

    Sjouke Burry Guest

    It will charge to maybe 30 percent, higher if the 12v supply gives
    a bit more then 12 volt.
  3. Guest

    Yes. A 12V lead acid battery is typically charged at 14.2 to 14.4

  4. benitos

    benitos Guest

    Le mercredi 5 septembre 2012 19:40:03 UTC-4, (inconnu) a écrit :Max I can go is 13.8V .

    Is it OK ?

    Also , because it's connected in // with the output , it's Ok if there is voltage across the battery all the time ?
  5. I think I would at least have a resistor between them. There's guys around
    here that know a lot more than I about the care and feeding of batteries,
    but it is my belief that some resistance in series will help prevent
    overcharging. Perhaps as little as 10 ohms or so.

    Mark Z.
  6. tm

    tm Guest

    No, you do not want any current to feed back into the unpowered supply. Use
    a good quality schottky diode of to appropriate current rating. Also,
    consider a fuse to avoid a fire. Lead acid batteries like to be charged from
    a constant voltage, current limited power supply.
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day