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BQ27541-V200: BQ27541-V200 low temperature chemic ID

Part Number: BQ27541-V200

     Follow the online method to make low temperature chemic ID, but also there is always an error in report as blow, the attachment is log file. where is error in the file?1638.log.zip

Resistance temperature compensation optimizer, rev=3.41  
  
Optimized Impedance Track parameters:  
  
Qmax, mAh : 2376  
  
Ra table normalized to 25C, uncompressed, unscaled  
  
DOD, % Ra, mOhm 
  
0 96 
11.11 96 
22.22 237 
33.33 299 
44.44 402 
55.56 497 
66.67 612 
77.78 633 
80.95 605 
84.13 616 
87.3 840 
90.48 1169 
93.65 2233 
96.83 3607 
100 4863 
  
Ra0_ch, mOhm : 122 This firmware is not explicitly supporting Ra0_ch, FCC drop could occur at low temperatures if used 
  
Thermal parameters:  
  
T Time Constant 287 
T Rise 3.14 
  
Optimized resistance temperature compensation parameters saved in *.chem file  
  
  
Due to GG file format issues, GG values have not been updated  
  
  
Warning: GG file could not be processed. Please check that it is unmodified  as exported by EV Software or BM Studio 
Warning: Automatic firmware properties detection failed. Rb_select defaults to 2. Please make sure that chem ID loaded in the GG file is the same as ID specified in the config.txt  
Warning: Automatic firmware properties detection failed. basescale defaults to 1. Please make sure that chem ID loaded in the GG file is the same as ID specified in the config.txt  
Error: negative room temperature resistance observed  R=-0.0175363630189387 usually caused by wrong chem ID selection 

  • Hello User,

    It just means you won't get an updated gg.csv file, however, you can use the Ra table attached here and T rise and T time constant values just need to be over-written.

    Thanks!

  • Hi kangkang,

           How I get an updated gg.csv file and new low temperature chemic ID?The report should include GG file and new chemic ID. I followed this step.

    The GPC tool requires a single .zip file containing one configuration file, two data files at room and low
    temperatures and one configuration parameters file (gg file) as input. The name of the .zip file is not
    important. The .zip file should contain following files:
    • config.txt
    • roomtemp.csv
    • lowtemp.csv
    • gg.csv

  • Hello User,

    You will need to over-write the Qmax, Ra table, T rise and T time constant from your GPC report output.