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BQ77915: Cell balancing wire Batt- and Batt+

Silvan Sommer
Intellectual 320 points
Part Number: BQ77915

Tool/software:

Hello 

For the cell balancing at the Batt+ Batt- like you see in the image:

Can I use the MAIN Batt+ and Batt- wire for the cell balancing wire too? Or do I need to separate those two wires, because of disturbance?

Ive planned to use the MAIN Batt+ and Batt- wire for the cell balancing is that okay?

Thanks

Silvan

  • +1
    TI__Mastermind 42060 points

    Hello Silvan,

    I would recommend to separate it at least on the PCB. The high-current path of the battery current should be separate from the IC's currents. A net-tie between BAT- and Vss/ground is often added to make that distinction clear. 

    However, there should not be much disturbance, because balancing is stopped during voltage measurements.

    Best Regards,

    Luis Hernandez Salomon