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bq27750 serial connection

Mikhail Ipatev
Prodigy 60 points
Other Parts Discussed in Thread: BQ40Z50
Hello! I have 4 batteries with bq27750 BMS. Can I connect them in series? 
And, if it is impossible to do this simply, then what needs to be changed 
in the schemes so that this would be possible?
  • +1
    TI__Guru 57697 points

    Hello Mikhail,

    Assuming that the batteries are independent, each gauge will be isolated and have different grounds. Therefore you can connect in series. But this is not desired due to other shortcomings.

    If the application requires series cells, a better choice of gauge is the bq40z50.