I am very new to gas gauge operation, and I having some difficulty with the BQ2060. The system in question has never worked properly, and was designed (not by me) with a "dumb" charger, and the battery has no communications with any external devices except to send remaining capacity status. A new GG file was produced by the Protection Circuit manufacturer because the Design Capacity was originally set to 6000 where it should have been 9000. It was expected that this change would correct the sync problems that users were experiencing.
Please see the attached log file from the first cycle after the new GG file was written to the EEPROM, and the board was calibrated. My battery analyzing station is "dumb", but the log file matches the station reporting of capacity/voltage/current readings until discharge reaches 3316 remaining.
- At the next poll, the remaining capacity drops suddenly to 612, while the voltage and current continue to log
- After 8 minutes, the remaining capacity “freezes” at 281 while current and voltage continue to log
- After 20 more minutes, remaining capacity starts logging again, until it reaches Zero, well before the pack is depleted.
I have also attached the GG file - is there something that is set incorrectly? Not that a subsequent cycle yields much the same results...
Thanks for any insight that can be provided.
[Device] Name=BQ2060 [EEPROM Contents] 0=7F 1=3C 2=0A 3=00 4=76 5=02 6=00 7=00 8=00 9=00 10=38 11=31 12=80 13=00 14=2A 15=00 16=00 17=00 18=30 19=2A 20=31 21=00 22=8B 23=2E 24=00 25=00 26=C4 27=09 28=00 29=00 30=76 31=02 32=07 33=50 34=72 35=6F 36=54 37=65 38=63 39=68 40=FF 41=FF 42=FF 43=00 44=00 45=00 46=89 47=FE 48=04 49=34 50=30 51=32 52=31 53=FF 54=FF 55=FF 56=28 57=23 58=28 59=23 60=E0 61=E3 62=00 63=E6 64=04 65=4C 66=49 67=4F 68=4E 69=FF 70=A0 71=0F 72=13 73=1B 74=76 75=9C 76=A1 77=FF 78=0F 79=40 80=07 81=08 82=2D 83=05 84=12 85=64 86=00 87=00 88=00 89=00 90=00 91=00 92=00 93=00 94=09 95=07 96=B0 97=04 98=0C 99=FC 100=FD 101=00 102=23 103=4F 104=02 105=52 106=AB 107=36 108=5E 109=D4 110=96 111=D3 112=2E 113=D2 114=28 115=23 116=C8 117=28 118=00 119=00 120=7C 121=29 122=00 123=00 124=00 125=00 126=5A 127=A5 [EEPROM] Remaining Time Alarm=10 Remaining Capacity Alarm=630 EDV A0 Factor=0.00 Charging Voltage=12600 Cycle Count=42 Design Voltage=10800 Specification Information=0 0 3 1 Manufacture Date=4/11/2003 Serial Number=0 Fast Charging Current=2500 Maint Charging Current=0 Pre-Charge Current=630 Manufacturer Name=ProTech Light Load Estimate=0.00 Maximum Overcharge=375 Device Name=4021 Last Measured Dsg=9000 Pack Capacity=9000 Cycle Count Threshold=7200 Pack Configuration=E6 Device Chemistry=LION MaxT DeltaT=FF Overload Current=4000 Overvoltage Margin=304 Overcurrent Margin=432 Cell Under/Over Voltage=76 Fast Charge Termination %=100 Fully Charged Clear %=95 Charge Efficiency=100.0 Current Taper Threshold=288 Current Taper Qual Volt=128 Mfg Data Str Length=7 Control Mode=08 Digital Filter=50.00 Self Discharge Rate=0.21 Battery Low %=7.0 Near Full=200 VFC Offset=B00709 Temperature Offset=0.4 ADC Offset=12 Cell 2 Calibration Factor=-4 Cell 3 Calibration Factor=-3 Cell 4 Calibration Factor=0 ADC Voltage Gain=16.2072 ADC Sense Resistor=29.770 VFC Gain/Current=29.268 VOC 25%=11170 VOC 50%=11370 VOC 75%=11730 EDVF/EDV0=9000 EMF/EDV1=10440 EDV T0 Factor=0 EDV2=10620 EDV C0 Factor=380 EDV C1 Factor=5 EDV R0 Factor=0 EDV R1 Factor=0
