Other Parts Discussed in Thread: BQ27426
Hi-
I am characterizing Foxnovo 3400mAh for golden image. I just got a GPC report as shown below, how can I interpret the result? For example, what are chem ID and generic ID? Is 3608 the one we should use? Why it says " devices like bq274xx " but we are using 27742?
Based on the result, what is next step to do?
thanks!
Michael
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Best chemical ID : 3608 Best chemical ID max. deviation, % : 2.27
Summary of all IDs with max. DOD deviation below 3%
Chem ID max DOD error, % Max R deviation, ratio
3608 2.27 0.35
Max. deviations for best ID is within recommended range. Chosen best chemical ID is suitable for programming the gauge.
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 19.54
3142 bq27421-G1D: 4.4V LiCoO2 20.03
128 bq27421-G1A: 4.2V LiCoO2 34.58
312 bq27421-G1B: 4.3V LiCoO2 36.79
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 19.54
1210 bq27621: (ALT_CHEM1) 4.3V LiCoO2 20.6
1202 bq27621: (default) 4.2V LiCoO2 25.14
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 14.1
3142 bq27426: (ALT-CHEM2) 4.4V LiCoO2 20.03
1202 bq27426: (ALT_CHEM1) 4.2V LiCoO2 25.14
Best generic ID 3230
Warning: Deviation for best generic ID is above recommended level for this device / family. Consider using another device, flash based gauge or RAM programming of custom ID.
Warning: difference between initial and final DOD is less than 90% dDOD_%= 82 Try to decrease the discharge rate
Warning: difference between initial and final DOD is less than 90% dDOD_%= 82 Try to decrease the discharge rate
