Other Parts Discussed in Thread: BQ34Z100, BQSTUDIO
Tool/software:
I am trying to get the correct chem ID to perform the learning cycle on BQ34z100.
I am using a 16S1P configuration in the pack, but just characterizing a single cell. I did a charging cycle at the C/5 rate, rested for 5 hours, discharged at C/10, rested for 5 hours. I uploaded the zip file and i got the attached report. It shows Best chemical ID : 435 Best chemical ID max. deviation, % : 16.81. I have done MANY cycles and this was the best outcome (previous tests had up to 35% deviation).
The cell we are using is from HAIDI, cell type HDCF26650-3600. There is not a match in BQStudio.
I don't know what is causing the high deviation. Can anyone help?
Thank you in advance.
Chemistry ID selection tool, rev=2.57 Configuration used in present fit: ProcessingType = 2 NumCellSeries = 1 ElapsedTimeColumn=0 VoltageColumn = 1 CurrentColumn = 2 TemperatureColumn = 3 Best chemical ID : 435 Best chemical ID max. deviation, % : 16.81 Summary of all IDs with max. DOD deviation below 15% 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, % 354 bq27411-G1C: 4.35V LiCoO2 35.46 3142 bq27421-G1D: 4.4V LiCoO2 36.3 128 bq27421-G1A: 4.2V LiCoO2 36.79 312 bq27421-G1B: 4.3V LiCoO2 97.56 Best generic ID 354 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, % 354 bq27621: (ALT_CHEM2) 4.35V LiCoO2 35.46 1202 bq27621: (default) 4.2V LiCoO2 38.83 1210 bq27621: (ALT_CHEM1) 4.3V LiCoO2 43.04 Best generic ID 354 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 30.22 3142 bq27426: (ALT-CHEM2) 4.4V LiCoO2 36.3 1202 bq27426: (ALT_CHEM1) 4.2V LiCoO2 38.83 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
Scott R.
