48V Lead acid battery charger circuit

Discussion in 'The Projects Forum' started by nhh, Oct 4, 2007.

  1. nhh

    Thread Starter New Member

    Oct 4, 2007
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    Design for 48V, 3A Lead acid battery charger.

    When battery voltage lower 49.4VDC, source power's supplied for battery, if battery voltage higher 55.8VDC, source power isn't used.

    Pls help me! Have any problem with this circuit?
    [​IMG]
     
  2. chandrankanagaraj

    New Member

    Nov 11, 2009
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    in your circuit got READER 1, READER 2...what kind of device is this?
    can u reply as much as possible please
     
  3. SgtWookie

    Expert

    Jul 17, 2007
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    They actually read "HEADER 2" and "HEADER 2". They are a type of connector.

    This thread had no replies in over two years; the original poster has not been back since then.

    The schematic is a very bad design. It would not work well, if at all.
     
  4. chandrankanagaraj

    New Member

    Nov 11, 2009
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    hi..MR.SgtWookie
    thank u so much for your reply....
    do u have any 48V Lead acid battery charger circuit?
    i am waiting for your reply.....ple
     
  5. SgtWookie

    Expert

    Jul 17, 2007
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    I am sorry, I do not have a circuit to charge such a battery.

    All of the lead-acid batteries that I have worked with were either 6v, 12v, or 24v.

    Is your 48V battery a single battery, or is it made up of a number of smaller cells?

    What is your battery's AH rating, and what type of battery (or batteries) are they?

    Lead-acid and sealed lead-acid may need different charging methods.
    AGM uses another charging method.
     
  6. chandrankanagaraj

    New Member

    Nov 11, 2009
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    it is a single unit charger...i am fine with 24V Lead acid battery charger circuit which is u said that....
    if u have please send it to me..
    thank u MR.Wookie
     
  7. SgtWookie

    Expert

    Jul 17, 2007
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    I don't really have ANY charger schematics already drawn up. It would take some time to do so, and I am about ready for bed.

    There is a 12v battery charger schematic that is in the Projects Collection forum.

    You could probably adapt that design for use at 24v.

    You could also use a couple of 12v battery chargers connected in series to charge a 24v battery.
     
  8. chandrankanagaraj

    New Member

    Nov 11, 2009
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    currently we using 4 unit as a series(12V Lead acid battery charger)
     
  9. chandrankanagaraj

    New Member

    Nov 11, 2009
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    i need circuit only..we already have 48V Lead acid battery charger in 4 units
     
  10. SgtWookie

    Expert

    Jul 17, 2007
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    I see. That does work, correct?

    Using four commercial off-the-shelf units would probably be less expensive than designing and building one.
     
  11. SgtWookie

    Expert

    Jul 17, 2007
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    OK, I understand - you need a circuit.

    Well, I won't be able to do anything about that for at least the next 12 hours.
     
  12. chandrankanagaraj

    New Member

    Nov 11, 2009
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    sry i couldn't find that 12v charger ckt frm the forum.it would be really helpful if you provide it to me.if u need sometime also fine for me.
    thnk you
     
  13. chandrankanagaraj

    New Member

    Nov 11, 2009
    14
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    that's really pleasure for me...take ur time.
    thnk u
     
  14. chandrankanagaraj

    New Member

    Nov 11, 2009
    14
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    hi....MR.wookie
    did u make circuit for me....?
    ple i am waiting for ur reply
     
  15. SgtWookie

    Expert

    Jul 17, 2007
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    No, I did not.

    I do not know where you live, but if I had to guess, I would say India. It would help if you put at least your Country in your profile.

    I do not know what kind of power you have available. If you have about 60V DC available, that would be very good.
    If you do not have 60V DC available, I will need to know what other kinds of power you have available, as in what voltage in DC or AC RMS, current, and frequency in Hz.

    I only know that you want to charge a 48v battery. I am guessing that it is a lead-acid battery.

    What is the battery construction?
    Deep-cycle lead-acid?
    Standard lead-acid?
    AGM lead-acid?
    Other construction type?

    What is the battery AH rating?

    How quickly must you charge it? It is best for battery life if it is charged fairly slowly, but AGM batteries can be charged much more quickly than standard lead-acid batteries.
     
    Last edited: Nov 24, 2009
  16. chandrankanagaraj

    New Member

    Nov 11, 2009
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    I staying in India. i have about 48V DC....
    I have power 1500 Watts.
    Voltage in DC ,
    Current 32A, frequency not sure.

    I only using a 48v battery. it is a lead-acid battery.

    It is the battery construction Deep-cycle lead-acid

    It is the battery 26AH rating..

    Its charging normally to the lead-acid batteries
     
  17. SgtWookie

    Expert

    Jul 17, 2007
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    OK, so you have a generator or solar cell or something like that, which supplies you with 48V DC at up to 32 Amperes? Is that what you're trying to tell me?

    Or are you trying to tell me that you only have 48V batteries?

    This is where I'm getting confused.

    Are you trying to charge one lead-acid battery from another lead-acid battery? Or do you have a generator or solar panel or wires coming in from a power company somewhere?
     
  18. chandrankanagaraj

    New Member

    Nov 11, 2009
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    I have a Fuel cell , i am trying to tell u that i only have 48V batteries.Power from Fuel cell..
     
  19. SgtWookie

    Expert

    Jul 17, 2007
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    OK. So, you have a Fuel Cell that generates 48V DC and can output up to 32A, or about 1500 Watts.

    From this fuel cell, you need to re-charge a single 48 volt lead-acid battery that has a 26 Ampere-hour capacity.

    Is that correct?

    Or do you have multiple 48V lead-acid batteries that you need to charge?

    Do you know what the maximum safe charging rate is for these batteries? The manufacturer would be able to tell you this information.
     
  20. chandrankanagaraj

    New Member

    Nov 11, 2009
    14
    0
    hi.MR.wookie..please reply me
     
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