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Battery charge/discharge circuit

Discussion in 'Power Electronics' started by Eoin Duggan, May 9, 2015.

  1. Eoin Duggan

    Eoin Duggan

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    May 9, 2015
    Hi, I am wondering of anyone is able to help me explain this circuit. I have a brief idea on how it works, but not 100%. its going to be presented in a 5 minute slide show, so around a 30 second explanation would be great, thanks!
     

    Attached Files:

  2. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    Hello Eoin
    Why are you doing this? Job interview is it? Why would you be asked to do this? can someone turn it up the right way, its difficult to follow on its side.
    Thanks Adam
     
  3. Eoin Duggan

    Eoin Duggan

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    May 9, 2015
    Hi Adam, Its basically a project I have in college. I wss expecting an explanation to come with the kit, but it did not. I have attatched the picture the correct way for you. Thanks. Eoin
     

    Attached Files:

  4. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    Ok what do you know so far? What are the bit you are not sure of?
    Adam
     
  5. Eoin Duggan

    Eoin Duggan

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    May 9, 2015
    Im unsure on once the battery has completed the discharge, how does It change to the charging stage?
    Thanks Eoin
     
  6. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    Ok so SW1 is the discharge switch is it?
     
  7. Eoin Duggan

    Eoin Duggan

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    May 9, 2015
    Yeah, once pressed the discharge begins, and It discharges for 14 hours
     
  8. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    So it looks like its either charging or discharging. If you dont press the discharge butoon it will charge, is this correct?
    Adam
     
  9. davenn

    davenn Moderator

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    Sep 5, 2009
    hi Eoin cant help you there ....

    its pretty disgusting that their www site doesn't even have a description of operation :(
     
  10. Eoin Duggan

    Eoin Duggan

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    May 9, 2015
    I thought It had an automatic discharge, so would start discharge, then switch to charge once battery is flat
     
  11. davenn

    davenn Moderator

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    Sep 5, 2009
    it did say it has an automatic discharge and charge


    so in that it will detect when the voltage has dropped to a predetermined level
     
  12. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    Looks like it work the other way. When you press the switch it latches A2 which starts to discharge the battery, when the battery voltage has gone low enough set by resistors at the bottom of the circuit diagram then A1 resets the discharge circuit and the timer via C2. The timer will also timeout after a certain time also. After a quick look thats what I think. I will need more time to be sure.
    Adam
     
  13. Eoin Duggan

    Eoin Duggan

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    May 9, 2015
    Hi Adam, Its basically a project I have in college. I wss expecting an explanation to come with the kit, but it did not.
    right okay, didnt know that, thanks adam
    Eoin
     
  14. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    Let me have another look sometime tommorow. I'll let you know. Just couldnt see a charge button.
    Adam
     
  15. Eoin Duggan

    Eoin Duggan

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    May 9, 2015
    Ok thanks! Yeah its all connected to one start switch
     
  16. Arouse1973

    Arouse1973 Adam

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    Dec 18, 2013
    Hi Eoin
    I have looked at the circuit again and yes it looks like it discharges the battery first before charging. The reason for this is because it does not have any other termination method other than a timer. If you placed a fully charged battery on this circuit you could end up damaging the battery after 14hours or 52 minutes of charge if it didn't discharge first.
    Thanks
    Adam
     
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