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Original question:

BQ20Z95: possibility to read out QPC, DOD, Grid number etc?

BQ20Z95: possibility to read out QPC, DOD, Grid number etc?

Imre Sunyi
Prodigy 110 points

Part Number: BQ20Z95

Hello TI

Finally I have received the .senc file from our batterymanufacturer. Is this helful for analysis of the problem described in the now closed thread that this links to?

firmware 70248E_V1.1.senc.zip

  • 0
    TI__Mastermind 42535 points
    Hi,

    I will check out your srec and see if there are any clues to your RSOC problem. Please allow me 2 weeks to investigate.
  • 0 in reply to Batt
    Prodigy 110 points

    Hi

    Found any suspicious in the attached file I provided?

    Br

    Imre

  • 0 in reply to Imre Sunyi
    TI__Mastermind 42535 points
    Imre,

    I uploaded the senc on to the device. This version does not have the ability to show the grid points, DOD etc. They are internal parameters that are used to present the RSOC, RM, FCC etc to you in this version. For upgraded functionality, you need to use the newer bq40z50-R2 gauge.
  • 0 in reply to Batt
    Prodigy 110 points
    Batt, to use a never gauge is not an option to have upgraded functionality. We buy this battery pack from a vendor that has selected this BQ20Z95 gauge.

    I interpret you can not with the data in the .senc file have any idea on why the SOC and FCC turn to '0' when voltage is on near full level in subzero temperatures?

    As I wrote in the original thread that is now locked: "The device this battery pack is residing in has been put on load test (peak is max 1.8C) in temperature chamber set to +50 degC. When that test was done battery was charged to full and device turned off. Before turning off the FCC and SOC reported normal values. Then temperature chamber was set to -40 degC. When powering on the device again the day after the FCC and SOC reported 0."

    I will try to reproduce the issue on our device. I will log parameters every 30:th second when our device is active. Unfortunately I can not log when device is turned off. The parameters I will log is on register 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0f, 0x10, 0x16.

    Br
    Imre
  • 0 in reply to Imre Sunyi
    TI__Mastermind 42535 points

    Imre,

    For this your battery needs to be characterized at that temperature. Unless this is done, at very low temperatures you will have a reported zero capacity.

    Most of the chemistries are characterized for operation between 0C to 50C. Yours is an extreme case. Unless your chemistry data is specifically characterized for your operation, you will not see optimum results.