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BQ40Z50-R2: About Cell Balancing Permanent Fail

Tsukui Yusuke
Guru 21930 points
Part Number: BQ40Z50-R2

Hi,

”Cell Balancing Permanent Fail” sets the Fail flag with the information of ”Delta Threshold" as the threshold.



However, it is unclear which value it compares to.
Which of the following is the comparison target?

1.

2.

Does BQ40Z50-R2 use RAM data or data flash data?

And Could you explain in detail about "Cell Balancing Permanent Fail"?

Regards,
Yusuke

  • 0
    TI__Mastermind 24870 points

    Hello Yusuke-san,

    The bq40z50-R2 uses flash data and loads flash into RAM during operation.

    I will need to double check, but from the units, it does look like this will trip once any of the timers exceed 240 hours required to balance.

  • 0 in reply to Kang Kang
    Guru 21930 points

    Hello Kang-san,

    Thank you for your response.
    I would like to ask a question additionally.

    1.
    When the total CB time exceeds "CB:Delta Threshold", the PF alert bit becomes ”1”.
    Is this understanding correct?
    And Please tell me because the meaning of "Time Cell 1..4" is unclear.

    2.
    If 1. is correct, Where should I check the "total Time cell 1..4"?
    The customer wants to test that the PFAlert bit is set when it exceeds the set "CB Delta Threshold" while comparing it with "total Time cell 1..4".



    Regards,
    Yusuke

  • 0 in reply to Tsukui Yusuke
    Guru 21930 points

    Hi Kang-san,

    Is there any update about this post?
    Let me know if we can give you any other information.

    Best regards,
    Yusuke

  • 0 in reply to Tsukui Yusuke
    Guru 21930 points

    Hi team,

    Is there any update?
    Let me know if we can give you any other information.
    Customer has a problem where the Cell Balancing Permanent Fail flag is not set.
    Therefore, we need this information.

    Best regards,
    Yusuke