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2 BQ77910A Stacking

Lawrence Ng
Prodigy 20 points
Other Parts Discussed in Thread: BQ77910A

Hi,

I have some question about how to stack two BQ77910A together to create a 20 cell battery BMS.

Do you have any reference design about it?

Thanks.

  • 0
    Expert 2135 points

    Lawrence,

    Check out the Application Notes section on the bq77910A web page and download the "Basic circuits for bq77910A stack design" PDF. Hopefully it answers your questions.

    John

  • 0 in reply to John M
    Prodigy 20 points

    John,

    Thanks for the reply.

    I have another question about the connection of the battery cell voltage wire to the IC sense pin.

    The PDF attachment below is the connection diagram which i connect the wire from every cell through a socket to the IC voltage sense pin.

    The question i having now is the way IC No.1 pin VC11 connect to IC No.2 VC1 is it correct to connect like this?

    Is the connection as attachment show correct?

    thanks.

    5531.wire connection.pdf

  • 0 in reply to Lawrence Ng
    Expert 2135 points

    Hello Lawrence,

    While I knew that the stacking document was available, unfortunately I have no experience with stacking the bq77910A and can't answer your question.