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Serious lead-acid battery charger

Discussion in 'Power Electronics' started by Orefat, Jan 7, 2016.

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  1. Orefat

    Orefat

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    Jul 22, 2012
    Hello everybody!

    I'm planning to build a serious 220V 50Hz to 28V 15A(min.) smart charger for lead-acid batteries.
    And, to be frank, I have no idea where to start. I would appreciate any suggestions on this topic.
    Smart term in this case means that the voltage will fluctuate, from 28V (which will be constant voltage potential if battery is good) to 32V (if battery is "dead" and the charger will rise voltage to this point to try to revive the battery).
    The current source and drivers should be SMPS but, as mentioned, with approach to soar the voltage.
    So, what PSU type you recommend, which SMPS controllers, flyback, transformers, MOSFETs, IGBTs, maybe a MCU based psu?
    Thanks in advance.
     
  2. davenn

    davenn Moderator

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    1,939
    Sep 5, 2009
    didn't know they made 28V lead acid batteries ??
     
  3. Orefat

    Orefat

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    0
    Jul 22, 2012
    Batteries are 24V.
     
  4. Martaine2005

    Martaine2005

    3,328
    910
    May 12, 2015
    Do you mean two 12v in series?
    Either way, this project would be far too complex if you don't know where to start.
    Better to buy one.

    Martin
     
  5. dorke

    dorke

    2,342
    665
    Jun 20, 2015
    Probably a large truck battery.

    @Orefat ,
    It isn't the simplest of projects out there,
    why won't you use a commercial one?
     
  6. Orefat

    Orefat

    4
    0
    Jul 22, 2012
    I bought a commercial one, but making one is such a challenge, isn't it?
    Btw, the batteries are from Karcher battery-powered scrubber drier (1.2V per cell).
     
  7. BobK

    BobK

    7,682
    1,688
    Jan 5, 2010
    I have never heard of lead acid batteries with1.2V per cell, they are normally 2.0V per cell. This sounds more like NiCad or NiMH.

    Bob
     
  8. Colin Mitchell

    Colin Mitchell

    1,417
    313
    Aug 31, 2014
    "smart charger for lead-acid batteries" needs a smart design-engineer with 4 years experience.
     
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