Correct gas gauge parameters setup

[kaklik]

@kakl našel postup, jak ziskat chemistry ID pro guage https://www.ti.com/lit/an/slva725a/slva725a.pdf chce to tu nasi nabijecku, zmerit jeden vybijeci a jeden nabijeci cyklus, to se zazipuje a uploadne na TI web a do hodiny by melo prijit chemistry ID Tady je postup: https://www.ti.com/tool/GPCCHEM#description

[roman-dvorak]

Soubor, který naměřil @kakl je needostatečný. TI vyžaduje více souborů (viz odpověď v emailu). Je tedy potřeba více prozkoumat jejich potřeby:

Naměřená data vypadají takto:

Naměřené CSV: lto.log

[roman-dvorak]

Po převedení logu do správného formátu a doplnění o metadata přišel takovýto report:

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Summary of all IDs with max. DOD deviation below 3%     

Chem ID max DOD error, %    Max R deviation, ratio
0   0   0

Warning: Deviation is above recommended level. New chem ID needs to be released for this cell. Please contact your TI representative to send the cell to Dallas for characterization        

Selection of best generic ID for ROM based devices like bq274xx     

Device / Family #1      
Generic Chem ID Device/ Voltage/ Chemistry  max DOD error, %
312 bq27421-G1B: 4.3V LiCoO2    200
354 bq27411-G1C: 4.35V LiCoO2   200
3142    bq27421-G1D: 4.4V LiCoO2    200
128 bq27421-G1A: 4.2V LiCoO2    200
Best generic ID 312     
Warning: Generic ID Deviation is so high that it is most likely due to anomaly in the data. Please check that data files have recomended format, units and test schedule        

Device / Family #2      
Generic Chem ID Device/ Voltage/ Chemistry  max DOD error, %
1210    bq27621:  (ALT_CHEM1) 4.3V LiCoO2   200
354 bq27621:  (ALT_CHEM2) 4.35V LiCoO2  200
1202    bq27621: (default) 4.2V LiCoO2  200
Best generic ID 1210        
Warning: Generic ID Deviation is so high that it is most likely due to anomaly in the data. Please check that data files have recomended format, units and test schedule        

Device / Family #3      
Generic Chem ID Device/ Voltage/ Chemistry  max DOD error, %
3230    bq27426: (default) 4.35V LiCoO2 100
3142    bq27426: (ALT-CHEM2) 4.4V LiCoO2    200
1202    bq27426: (ALT_CHEM1) 4.2V LiCoO2    200
Best generic ID 3230        
Warning: Generic ID Deviation is so high that it is most likely due to anomaly in the data. Please check that data files have recomended format, units and test schedule        

Warning: First OCVpoint has non-zero current I=  -0.01 Please make sure you have a 2 hr relaxation period before the beginning of discharge.        
Warning: Last OCVpoint has non-zero current I=  -0.016 Please make sure you have a 5 hr relaxation period after the end of discharge.       
Warning: Discharge rate is too high. High rate reduces ID detection accuracy     10 hr rate is recomeended. Total discharge time is less than 5 hrs  t_hrs=  3.64923638888889

Zaslaná data jsou: lto.zip Report: lto-report.zip

Rozpoznání chemie tedy není moc úspěšné. Nebylo dodrženo několik požadavků na zdrojová data. Třeba vysoká rychlost vybíjení nebo krátké ustálení napětí na konci měření.