Other Parts Discussed in Thread: GPCCHEM
Tool/software:
This is a continuation of this thread, but it may be not important to reference:
This test is on a custom board using two parallel Lithium Ion batteries (13S) shown here:
https://maxamps.com/collections/13s-46-8v-li-ion/products/li-ion-5000-13s1p-46-8v-battery-pack
I confirmed with the manufacturer that this battery uses Samsung 50S cells.
I did the GPC CHEM evaluation and received the report below which identifies Chem IDs 2144 and 2708 as best matches :
"Chem ID max DOD error, % Max R deviation, ratio
2144 2.71 1.42
2708 2.97 0.05"
However, there are also notes in the report that the deviation is so high there is likely an anomaly in the data. I reviewed the data to try to clean up any odd entries and re-ran the GPC CHEM tool a few more times, but it continued to come back with the same IDs.
"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"
I suspect the 2144 and 2807 IDs are invalid because 2144 is a NiCoMn/carbon battery in Battery Management Studio.
Chemistry ID selection tool, rev=2.54 Configuration used in present fit: ProcessingType = 2 NumCellSeries = 13 ElapsedTimeColumn = 0 VoltageColumn = 1 CurrentColumn = 2 TemperatureColumn = 3 Best chemical ID : 2144 Best chemical ID max. deviation, % : 2.71 Summary of all IDs with max. DOD deviation below 3% Chem ID max DOD error, % Max R deviation, ratio 2144 2.71 1.42 2708 2.97 0.05 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, % 3142 bq27421-G1D: 4.4V LiCoO2 24.12 354 bq27411-G1C: 4.35V LiCoO2 26.19 128 bq27421-G1A: 4.2V LiCoO2 27.23 312 bq27421-G1B: 4.3V LiCoO2 30.82 Best generic ID 3142 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, % 1202 bq27621: (default) 4.2V LiCoO2 24.1 1210 bq27621: (ALT_CHEM1) 4.3V LiCoO2 24.66 354 bq27621: (ALT_CHEM2) 4.35V LiCoO2 26.19 Best generic ID 1202 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, % 1202 bq27426: (ALT_CHEM1) 4.2V LiCoO2 24.1 3142 bq27426: (ALT-CHEM2) 4.4V LiCoO2 24.12 3230 bq27426: (default) 4.35V LiCoO2 26.57 Best generic ID 1202 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
Upon updating the gauge to CHEM ID 2144 and attempting a learning cycle, it did not complete. Learning Status was stuck at 5 and did not transition to 6. Those logs will be posted in a few minutes in a follow up post (on a different computer).
Can you please help with next steps to correctly identify the cell chemistry profile and complete the learning cycle? Thank you
