Other Parts Discussed in Thread: BQ27426
之前用新的电芯，匹配化学id 一直可以，这次的新电芯跑了俩次数据，匹配误差都很大，6%多，
新的电芯规格：工作电压4.2 - 2.5V 容量8100mAh
常温25度情况下，抓包记录，充满到 0.01C、静止2小时，0.1C放电，静止5小时
疑问，难道化学ID库，没有三元截至电压 2.5V的库？？？？？？？？？？？？？？？？？？？？？
怎么才能匹配到我这个电芯合适化学ID，求在线解答
下面为官方返回结果：
Chemistry ID selection tool, rev=2.54
Configuration used in present fit:
ProcessingType=2
NumCellSeries=1
ElapsedTimeColumn=0
VoltageColumn=1
CurrentColumn=2
TemperatureColumn=3
Best chemical ID : 220 Best chemical ID max. deviation, % : 6.43
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, %
3142 bq27421-G1D: 4.4V LiCoO2 15.71
354 bq27411-G1C: 4.35V LiCoO2 16.65
128 bq27421-G1A: 4.2V LiCoO2 16.94
312 bq27421-G1B: 4.3V LiCoO2 18.64
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 16.06
1210 bq27621: (ALT_CHEM1) 4.3V LiCoO2 16.36
354 bq27621: (ALT_CHEM2) 4.35V LiCoO2 16.65
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, %
3142 bq27426: (ALT-CHEM2) 4.4V LiCoO2 15.71
1202 bq27426: (ALT_CHEM1) 4.2V LiCoO2 16.06
3230 bq27426: (default) 4.35V LiCoO2 17.68
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