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BQ27Z561: In addition to charge and discharge, are there any other condition will cause cycle count change?

Yue TANG
Expert 8695 points
Part Number: BQ27Z561
Other Parts Discussed in Thread: BQSTUDIO

Hi,

         customer want to know,   in addition to charge and discharge, are there any other condition will cause cycle count change?   

  • 0
    TI__Guru 57697 points

    Hello Yue,

    Cycle count is updated when the threshold is crossed. See TRM section 13.1.17 0x2A/2B CycleCount()

  • 0 in reply to Shirish
    TI__Expert 8695 points

    Shirish,

    1. Any possible reason  this count  change from 18 to 5. this is a quality issue report. just 1pcs. 

    2. What condition will reset this cycle count to 0. 

  • 0 in reply to Yue TANG
    TI__Guru 57697 points

    Hello Yue,

    The data flash parameter was probably written. There is no other way the count reduces.

  • 0 in reply to Shirish
    TI__Expert 8695 points

    Shirish,

                   0x2A,0x2B is readable only.  how to write to change cycle count. Do you  mean flash corruption?   that is why I asked how to reset cycle count to 0. below is some log from EC side. done can see this change, but don't have data in between.

    data part 1:

    10-11 14:22:35.783641  1412  1412 W healthd : battery l=100 v=8949 t=37.9 h=2 st=2 c=195 fc=4864000 cc=18 chg=a
    10-11 14:23:35.676806  1412  1412 W healthd : battery l=100 v=8934 t=37.3 h=2 st=2 c=0 fc=4864000 cc=18 chg=a
    10-11 14:24:35.676278  1412  1412 W healthd : battery l=100 v=8930 t=36.7 h=2 st=2 c=0 fc=4864000 cc=18 chg=a
    10-11 14:25:35.695146  1412  1412 W healthd : battery l=100 v=8927 t=36.3 h=2 st=2 c=0 fc=4864000 cc=18 chg=a
    10-11 14:26:35.662207  1412  1412 W healthd : battery l=100 v=8925 t=35.7 h=2 st=2 c=0 fc=4864000 cc=18 chg=a
    10-11 14:27:35.704251  1412  1412 W healthd : battery l=100 v=8923 t=35.3 h=2 st=2 c=0 fc=4864000 cc=18 chg=a
    10-11 14:28:35.684468  1412  1412 W healthd : battery l=100 v=8921 t=34.9 h=2 st=2 c=0 fc=4864000 cc=18 chg=a
    10-11 14:29:35.672409  1412  1412 W healthd : battery l=100 v=8921 t=34.5 h=2 st=2 c=0 fc=4864000 cc=18 chg=a
    10-11 14:30:35.667488  1412  1412 W healthd : battery l=100 v=8919 t=34.1 h=2 st=2 c=0 fc=4864000 cc=18 chg=a
    10-11 14:31:34.406126  1412  1412 W healthd : battery l=100 v=8919 t=33.8 h=2 st=2 c=0 fc=4868000 cc=18 chg=a
    10-11 14:32:35.659008  1412  1412 W healthd : battery l=100 v=8917 t=33.5 h=2 st=2 c=0 fc=4868000 cc=18 chg=a
    10-11 14:33:35.666451  1412  1412 W healthd : battery l=100 v=8917 t=33.2 h=2 st=2 c=0 fc=4868000 cc=18 chg=a
    10-11 14:34:35.674424  1412  1412 W healthd : battery l=100 v=8917 t=32.9 h=2 st=2 c=0 fc=4868000 cc=18 chg=a
    10-11 14:35:35.675103  1412  1412 W healthd : battery l=100 v=8916 t=32.6 h=2 st=2 c=0 fc=4868000 cc=18 chg=a
    10-11 14:36:35.662767  1412  1412 W healthd : battery l=100 v=8916 t=32.3 h=2 st=2 c=0 fc=4868000 cc=18 chg=a
    10-11 14:37:35.671345  1412  1412 W healthd : battery l=100 v=8916 t=32.1 h=2 st=2 c=0 fc=4868000 cc=18 chg=a
    10-11 14:38:00.567409  1412  1412 W healthd : battery l=100 v=8916 t=32.0 h=2 st=3 c=0 fc=4868000 cc=18 chg=
    10-11 14:38:00.707169  1412  1412 W healthd : battery l=100 v=8916 t=32.0 h=2 st=3 c=-16 fc=4868000 cc=18 chg=
    10-11 14:38:00.785893  1412  1412 W healthd : battery l=100 v=8916 t=32.0 h=2 st=3 c=-16 fc=4868000 cc=18 chg=
    10-11 14:38:00.820457  1412  1412 W healthd : battery l=100 v=8916 t=32.0 h=2 st=3 c=-16 fc=4868000 cc=18 chg=
    10-11 14:38:00.860302  1412  1412 W healthd : battery l=100 v=8916 t=32.0 h=2 st=3 c=-16 fc=4868000 cc=18 chg=
    10-11 14:38:10.731103  1412  1412 W healthd : battery l=100 v=8911 t=32.0 h=2 st=3 c=-54 fc=4872000 cc=18 chg=
    10-11 14:38:54.789683  1412  1412 W healthd : battery l=100 v=8915 t=32.0 h=2 st=3 c=-6 fc=4872000 cc=18 chg=

    data part 2:  

    01-04 05:05:07.895039  1367  1367 W healthd : batteryCapacityLevelPath not found
    10-11 17:14:36.999976  1367  1367 W healthd : battery l=34 v=7322 t=25.0 h=2 st=3 c=1515 fc=4000000 cc=5 chg=
    10-11 17:14:37.020065  1367  1367 W healthd : battery l=34 v=7316 t=25.0 h=2 st=3 c=1783 fc=4000000 cc=5 chg=
    10-11 17:14:37.034731  1367  1367 W healthd : battery l=34 v=7306 t=25.0 h=2 st=3 c=1811 fc=4000000 cc=5 chg=
    10-11 17:14:37.051142  1367  1367 W healthd : battery l=34 v=7314 t=25.0 h=2 st=3 c=1886 fc=4000000 cc=5 chg=
    10-11 17:14:38.625668  1367  1367 W healthd : battery l=34 v=7318 t=25.0 h=2 st=3 c=1072 fc=4000000 cc=5 chg=
    10-11 17:14:39.093129  1367  1367 W healthd : battery l=34 v=7302 t=25.0 h=2 st=3 c=1632 fc=4000000 cc=5 chg=
    10-11 17:14:51.520484  1367  1367 W healthd : battery l=34 v=7344 t=25.0 h=2 st=3 c=325 fc=4000000 cc=5 chg=
    10-11 17:14:53.629405  1367  1367 W healthd : battery l=34 v=7330 t=25.0 h=2 st=3 c=499 fc=4000000 cc=5 chg=
    10-11 17:19:08.954144  1367  1367 W healthd : battery l=34 v=7340 t=25.0 h=2 st=3 c=0 fc=4000000 cc=5 chg=u
    10-11 17:19:08.971617  1367  1367 W healthd : battery l=34 v=7342 t=25.0 h=2 st=3 c=0 fc=4000000 cc=5 chg=u
    10-11 17:19:09.237084  1367  1367 W healthd : battery l=34 v=7334 t=25.0 h=2 st=3 c=0 fc=4000000 cc=5 chg=a
    10-11 17:19:09.265593  1367  1367 W healthd : battery l=34 v=7334 t=25.0 h=2 st=3 c=0 fc=4000000 cc=5 chg=a
    10-11 17:19:15.892455  1367  1367 W healthd : battery l=34 v=7370 t=25.0 h=2 st=3 c=372 fc=4000000 cc=5 chg=
    10-11 17:19:15.920980  1367  1367 W healthd : battery l=34 v=7362 t=25.0 h=2 st=3 c=484 fc=4000000 cc=5 chg=
    10-11 17:19:17.717308  1367  1367 W healthd : battery l=34 v=7362 t=25.0 h=2 st=3 c=0 fc=4000000 cc=5 chg=u
    10-11 17:19:17.740743  1367  1367 W healthd : battery l=34 v=7364 t=25.0 h=2 st=3 c=0 fc=4000000 cc=5 chg=u
    10-11 17:19:18.010389  1367  1367 W healthd : battery l=34 v=7356 t=25.0 h=2 st=3 c=0 fc=4000000 cc=5 chg=a

     

  • +1 in reply to Yue TANG
    TI__Guru 57697 points

    Use bqStudio "Data memory" tab and look for the cycle count parameter. The TRM has the commands that are used for writing Data memory