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BQ35100: Firmware usage issue

Cherry Zhou
Mastermind 22235 points
Part Number: BQ35100

Hi team,

Here's some issues from the customer may need your help:

1. (3.6V Li-Thionyl Chloride) Using Lithium Primary Battery, metering chip BQ35100 (3 Modes Included, Accumulate, SOH, EOS, according to datasheet, EOS is designed for Li-Thionyl Chloride).

2. What are the steps for using firmware of BQ35100? Is fuel training required? (they are going to use EOS)

3.Regarding Li-Thionyl Chloride, is there any recommended chip for this battery with a lower power consumption (industrial field use)?

Could you help check this case? Thanks.

Best Regards,

Cherry

  • 0
    TI__Guru** 102395 points

    Hello Cherry,

    EOS should be used for LTC battery chemistry. The exact battery should be available in the database, otherwise it should not be used. The BQ35100 is the only primary gauge available.

    Keep in mind the EOS mode does not accurately represent SOH in most cases, it is only an alert for end of service.

    Sincerely,

    Wyatt Keller

  • 0 in reply to Wyatt Keller
    TI__Mastermind 22235 points

    Hello Wyatt,

    Wyatt Keller said:
    Keep in mind the EOS mode does not accurately represent SOH in most cases, it is only an alert for end of service.

    If exactly know SOH, is it set up in Accumulate mode and doing battery training?

    Thanks and regards,

    Cherry

  • 0 in reply to Cherry Zhou
    TI__Guru** 102395 points

    Hello Cherry,

    I'm not sure your question, there are 3 different modes for this gauge as you mentioned in your original question. You should only use one mode at a time. EOS mode is designed to use very little current because LTC batteries are usually used in long term projects (5-15 years).

    Accumulation mode requires the gauge to be active for more of the time and if you miss some of the discharges or don't account for self discharge, the gauge estimation will not be accurate. There is no learning/training for this gauge since it is for primary batteries.

    Sincerely,

    Wyatt Keller