Li-Ion charger AC-DC

Discussion in 'The Projects Forum' started by david1234, Oct 22, 2015.

  1. david1234

    Thread Starter Member

    Nov 27, 2013
    81
    1
    Hello ,
    I want to build a LI-Ion charger for my battery
    my battery is 11.1V (nominally) , 2000mAh
    max charger 12.8V

    I want to build a 220AC-12.8DC charger ,
    also I will create my own design of the circuit (i have some size issues )
    can someone help me with this?

    Thanks ,
     
  2. tom_s

    Member

    Jun 27, 2014
    285
    333
  3. david1234

    Thread Starter Member

    Nov 27, 2013
    81
    1
    o.k.
    Let say I use the ISL9220
    did you ever work with it? easy to apply?

    also I want to see I understand it
    Ieoc(end of charge)? - the I of the battery ? 2000mA in my case?
    Iin(how much mA does it give to the battery)? 1-1.2A in my case?
    but where do I set the voltage?
    didn't see it on the datasheet
     
  4. david1234

    Thread Starter Member

    Nov 27, 2013
    81
    1
    also
    I have found this circuit (using the LM317)
    http://www.electronicshub.org/automatic-battery-charger-circuit/

    it's seem nicer and easier

    I will probably use this on (it's ready )
    but I have some questions(changes for me):
    how can I change it to disconnect when the Vbat is 12V (and not 13.5)?
    also is there any why to limit the current?

    and the most impotent question - is it good for Li-Ion ?

    Thanks ,
     
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