Battery Simulation

Discussion in 'General Electronics Chat' started by adex44yrs, Dec 7, 2011.

  1. SgtWookie


    Jul 17, 2007
    What MOSFETs are you using now, and what MOSFETs were you using before?

    I didn't think to ask if you were using the exact same MOSFETs in the real circuit that you showed in the simulation.
  2. adex44yrs

    Thread Starter New Member

    Dec 7, 2011
    Hi there SgtWookie,

    I tried replacing the p-ch mosfets with n-ch mosfets today and I didn't get any substantial result. The n-ch mosfets start conducting without the charger connected, unless I dont connect Q10. If I do that then there would be no way the battery charger will start.

    I think I am going back to my original design, p-ch mosfets in source follower configuration connected to a single n-ch mosfet inform a push pull arrangement. In theory, this should work but I just don't know why it isn't.

    The p-ch mosfet: IRF9540, n-ch IRF540.

    I will provide more information as I get them.
  3. Ron H

    AAC Fanatic!

    Apr 14, 2005
    I have seen some complex models for lead-acid batteries. Have you Googled "lead-acid battery equivalent circuit modeling"?
    I have used a large capacitor (farads) in series with a resistor (milliohms) and a high-value parallel resistor (for leakage or load) to test battery charger simulations. They worked well for me, but I never actually built the chargers and tested them.:rolleyes: