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Li ion BMS Passive balancing

Discussion in 'General Electronics Chat' started by Kranthikkenoch, Sep 11, 2017.

  1. Kranthikkenoch

    Kranthikkenoch New Member

    Joined:
    Jun 28, 2017
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    Hello everyone,

    Below is my circuit for passive balancing Li ion battery pack, I have used differentials opamps to monitor individual cell volatge everything works fine
    but my cell voltages fluctuate a lot like around 3.5-3.4V when I turn on my mosfets. Please suggest me if I should add any capacitors or diodes to the circuit to avoid errors and what is its purpose

    BAL8,BAL7, BAL6...are my inputs to turn on or off mosfets using Microcontroller and I have used 24ohms resistors as load for discharge
     

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