battery charger capable of testing a battery if it is suitable for charging or not

Discussion in 'Homework Help' started by ProfGreddy Emmanuel, Feb 14, 2017.

  1. ProfGreddy Emmanuel

    Thread Starter New Member

    Feb 14, 2017
    hi guys, am facing a problem on how to design and implement my final year project on design and implementation of a 12v car battery charger, of which it will be capable of testing the battery before it starts to charge. the charger also must be capable of displaying test result (if suitable or not) on an LCD. the charger must be user interractive in a manner that the user will be able to select the test mode or charging mode through keypads.
  2. MrAl

    AAC Fanatic!

    Jun 17, 2014

    One test would be to charge with a light current and see that the voltage is either increasing toward normal or not, and if it keeps going after that. Then a higher current momentary charge to see if the voltage goes up too high in a short time.
    There are probably other tests too.
  3. shortbus

    AAC Fanatic!

    Sep 30, 2009
    Many of the new chargers use some type of comparator circuit. when first connected to the battery, if there isn't a high enough voltage on the battery it won't put out a charge current.