Tool/software:
Hi TI Engineer:
I made a 4S1P battery, the cell is 3.7V/21700, the SOC jumps at EDV2,EDV1 and EDV0 when discharging with 3A.
I tried it with 3.5A and the jump was bigger.
10%－7%，5%－3%，2%－0%
Please help analyze the data and how to optimize it?
In addition, the voltage values of EDV2,EDV1 and EDV0 in Data Flash are determined according to what? Is it discharge data?
If Smooth is set, does EDV_CMP still need to be set?
Please check GG file, discharge LOG, GPC Report.
BQ4050 dis-log.xlsx4666.BQ4050.gg.csv
GPC CEDV tool, rev=60 Configuration used in present fit ProcessingType=1 NumCellSeries=4 CellTermV=2750 LearnSOC%=7 FitMaxSOC%=10 FitMinSOC%=4 ChemType=1 ElapsedTimeColumn=0 VoltageColumn=1 TemperatureColumn=2 CurrentColumn=3 CEDV parameters resulting from the fit. If EDVV bit is set to 1, EMF and EDVR0 have to be multiplied by the number of serial cells when written to data flash EMF 3296 EDVC0 102 EDVC1 0 EDVR1 5043 EDVR0 55 EDVT0 2840 EDVTC 11 VOC75 15741 VOC50 15234 VOC25 15008 Recommended SOC deviation tolerance at EDV2 point is < 5% for low temperature and <3% for room and high temperature Deviations for this set of parameters are given below for each file file SOC error, % pass roomtemp_lowrate.csv 0.281175400799583 1 roomtemp_highrate.csv -0.684193700599869 1 hightemp_lowrate.csv 0.499237872278478 1 hightemp_highrate.csv -0.0961191635231282 1 lowtemp_lowrate.csv -0.0517829433337136 1 lowtemp_highrate.csv 1.07414430017362 1 Deviations are within recomended range. CEDV parameters are suitable for programming the gauge
SOC, % OCV, mV 0 2756 10 3231 20 3387 30 3470 40 3551 50 3659 60 3752 70 3829 80 3937 90 3971 100 4070
