Battery Charging control circuit

Discussion in 'Homework Help' started by hovik, Sep 21, 2009.

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  1. hovik

    Thread Starter Member

    Sep 21, 2009
    I am making a control circuit for charging of a 12 V battery, and I'm having problems starting because I can't figure out how I could measure that the battery is fully charged.

    If I apply 12 V (DC) to the battery, and the battery becomes fully charged... the node with the applied 12V and the battery 12V will be the same... or?
    So how can I know?

    And also, if applied 14 V for charging the 12V battery... what would happen?

    I realize that my questions might be stupid, but I really can't figure it out...
  2. Audioguru


    Dec 20, 2007
    A 12V battery is not fully charged at only 12V, it is barely charged.
    If you apply 14VDC to a 12V lead-acid battery then it will charge then it will become over-charged.

    To figure it out then learn about a lead-acid battery at the battery tutorial website you were given in the other website's forum.
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    One open thread should be enough.
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