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BQ35100: BQ35100: Inquiry about some EOS data

Marwan Khalid
Prodigy 171 points
Part Number: BQ35100

Dears,

the Battery is LS14500, and operating in EOS mode.

1) please check the following figure, what do these represent?

2) the load is consuming 150mA which less than 1% SOC of the battery(almost 0.04% SOC ), SOH delta max is set to 1 and after each gaugeStart/gaugeStop it reduces the SOH by 1%,

does this affect EOS data and EOS detection?

3) Is it feasible to set  SOH delta max to 0% ? which will make SOH to zero% after gaugeStart/gaugeStop.

Kind regards,

  • +1
    TI__Guru** 105760 points

    Hello Marwan,

    EOS Detection Pulse Count Threshold is the number of samples before the gauge starts looking at the long and short trend. Generally this should be set for around the 50% point in the application, so if you expect your application to last for 5 years with 1 sample per day, you would set the pulse threshold to around 900.

    EOS Relax V Hi Max Counts is used to determine when a measurement is "bad" meaning that the loaded voltage is higher than the expected OCV voltage. If the loaded voltage is above OCV for EOS Relax V Hi Max Counts then we set the EOS bad flag.

    Sincerely,

    Wyatt Keller

  • 0 in reply to Wyatt Keller
    Prodigy 171 points

    Thanks,

    Could you please inform me about the following questions?

        2) The load is consuming 150mA which less than 1% SOC of the battery(almost 0.04% SOC ), SOH delta max is set to 1 and after each gaugeStart/gaugeStop it reduces the SOH by 1%,

           does this affect EOS data and EOS detection?

        3) Is it feasible to set  SOH delta max to 0% ? which will make SOH to zero% after gaugeStart/gaugeStop.

  • 0 in reply to Marwan Khalid
    TI__Guru** 105760 points

    Hello Marwan,

    Some batteries you will not be able to get reliable SOH data while in EOS mode, this is mentioned in the TRM. EOS mode is mainly designed to give an alert based on the moving averages.

    You can set the delta to 0%, but I'm not sure this would make sense because SOH will never change then - you can leave it at 1% and not use the data.

    Sincerely,

    Wyatt Keller