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BQ79616-Q1: How to realize the open wire detection with bq79616-q1

Huang David
Intellectual 320 points
Part Number: BQ79616-Q1

Hi Expert,

How to realize the open wire detection with bq79616-q1? 

Thanks

Best regards,

David

  • 0
    TI__Intellectual 2850 points

    Hi David,

    The BQ79616-Q1 device is able to detect open wire detection on the VC and CB pins. This is achieved through having a current sink connected to each VC and CB pin (except VC0 & CB0- this is connected with a current source).

    If there is an open wire connection present and when the current sink is enabled, the external differential capacitor will be expended and the cell voltage measurement drops to an irregular level over time. This similarly applies to the VC0 & CB0 pins (with some minor changes). 

    When the diagnostic comparison is enabled, the device will compare cell voltage measurements between the Main ADC against either a host-programmed threshold or AUX CELL measurement (from the AUX ADC). 

    We have a more in-depth explanation of this process in the BQ79616-Q1 datasheet here and this can be found starting on page 95. I hope this helped!

    Best Regards,

    Julia Louis