BQ30Z554-R1: Reserve capacity and Rem capacity relation- Fuel gauge question

Hello Subrat,

The reserve capacity should not be changed to a value larger than the present remaining capacity. The gauge cannot display a negative remcap value, so it is most likely performing some calculations when this value is input and may overflow.

The purpose of setting the reserve capacity is to report 0% SOC when the reserve capacity is reached, so I'm not sure I understand the test you're performing since this would not be a use case for this feature.

Sincerely,

Wyatt Keller

Hi Wyatt,

Thank you for getting back.

The external charger that is being used for the older generation of battery pack is set up such that the charging occurs only when FCC is below 2000mAh and this cannot be changed. Since, this new generation battery pack has a new cell when higher capacity, the FCC is always be around 2750mAh. So, to account for this, the reserve capacity of 750mAh is added so that FCC always stays below 2000mAh and can charge in the external charger without any issues. As shown in table above, this works as FCC is always below 2000mAh when Reserve capacity of 750mAH is used.

Another thing is, when shipping the pack, its has to be below 30%RSOC due to shipping regulations, which comes to be around 730mAh to 740mAh Rem Capacity. This  value is when Reserve Capacity of 0mAh. When I then change the reserve capacity value to 750mAH to account for external charging issue FCC drops below 2000mAH which resolves the external charger issue. But now the Remaining capacity value is messed up.

As you said, the rem capacity value cannot be negative and as our rem cap is lower than res cap, how can this be worked around?

Does this Rem Cap fix itself when i perform few cycles with this new added reserve capacity or how does this impact my performance of the gauge?

Hi Wyatt,

With this same pack I have another question,

I have a 2S1P packs with pack capacity of around 2500mAh . I have added the reserve capacity of 750mAh in the gg file so that the FCC as reported by the Smbus always stays below 2000mAh. When I cycle the pack, I am seeing the jumps in FCC in few packs as if the gauge forgot to account of the reserve capacity and the reported FCC value is around that 2500mAh range.  here is my question

1. Why is the gauge reporting FCC of 2500mAh even when the reserve capacity of 750mAh is added? This new reserved capacity of 750mAh should always keep reported FCC below 2000mAH, so not sure why there is the jump in the gauge in FCC.

Hello Subrat,

You will either need to change the reserve capacity and perform a gauge reset, or cycle the gauge for it to update the capacity. If you change the value of reserve capacity and do not perform one of the steps, on the first cycle the gauge will adjust, like you see in the logs.

Generally when you change some of the settings and the batteries are in a relaxed state you should perform a reset so the values are implemented for gauging. When did you implement the change in the logs shared?

Can you share the logs and the .gg files from this test?

Sincerely,

Wyatt Keller

Hi Wyatt,

I can confirm that the reserve capacity was changed from 0mAh to 750mAh. Once this change was made, the pack underwent (PoR) power on reset where I shutdown the pack and wakeup the pack and verified the new reserve capacity was set.  Once this was verified, the pack was then cycled. 

I am not being able to load the gg file and logs here as the website is not allowing me to upload my files. But to answer your question, the pack underwent PoR and the change is reserve capacity was verified

Hello Subrat,

I will review further tomorrow and get back to you.

Sincerely,

Wyatt Keller

Hello Subrat,

Can you share the error or what is preventing the logs from being shared? If they're too large you may need to split the log. Reviewing the data I think would be the most helpful in this case, along with the settings.

The most common reason for FCC jumps is temperature change, the load select setting, or increased Ra table values. It could also be from the IT configuration settings that force the values at certain points, like CSYNC.

Sincerely,

Wyatt Keller

[Header]
bq EVSW Version = 0.9.92
DeviceName = bq30z554R1 v0.09
Time = 2/24/2022 10:39:57 AM


[State(Gas Gauging)]
Qmax Cell 0 = 2581
Qmax Cell 1 = 2581
Qmax Cell 2 = 2500
Qmax Cell 3 = 2500
Qmax Pack = 2581
Update Status = 0E
Cell 0 Chg Voltage at EoC = 4197
Cell 1 Chg Voltage at EoC = 4195
Cell 2 Chg Voltage at EoC = 0
Cell 3 Chg Voltage at EoC = 0
Current at EoC = 131
Avg I Last Run = -1253
Avg P Last Run = -950
Delta Voltage = 3
Max Avg I Last Run = -1255
Max Avg P Last Run = -1036
[IT Cfg(Gas Gauging)]
Load Select = 7
Load Mode = 0
Ra Filter = 50.0
Ra Max Delta = 15
Design Resistance = 24
Reference Grid = 4
Resistance Parameter Filter = 65142
Term Voltage = 4500
Term Voltage Delta = 500
User Rate-mA = 0
User Rate-cW = 0
Reserve Cap-mAh = 750
Reserve Cap-cWh = 0
Remcap Smoothing Filter = 240
Fast Scale Start SOC = 10
[Turbo Cfg(Gas Gauging)]
Min Turbo Power = 0
Pack Resistance = 30
System Resistance = 0
Max Current Rate = -4
High Frequency Resistance = 20
Reserve Energy % = 2
[Current Thresholds(Gas Gauging)]
Dsg Current Threshold = 50
Chg Current Threshold = 50
Quit Current = 35

[R_a0(Ra Table)]
Cell0 R_a flag = 0000
Cell0 R_a 0 = 35
Cell0 R_a 1 = 37
Cell0 R_a 2 = 41
Cell0 R_a 3 = 49
Cell0 R_a 4 = 35
Cell0 R_a 5 = 35
Cell0 R_a 6 = 42
Cell0 R_a 7 = 31
Cell0 R_a 8 = 118
Cell0 R_a 9 = 118
Cell0 R_a 10 = 184
Cell0 R_a 11 = 310
Cell0 R_a 12 = 770
Cell0 R_a 13 = 6385
Cell0 R_a 14 = 27791
[R_a1(Ra Table)]
Cell1 R_a flag = 0000
Cell1 R_a 0 = 32
Cell1 R_a 1 = 33
Cell1 R_a 2 = 38
Cell1 R_a 3 = 46
Cell1 R_a 4 = 32
Cell1 R_a 5 = 32
Cell1 R_a 6 = 39
Cell1 R_a 7 = 1
Cell1 R_a 8 = 26
Cell1 R_a 9 = 26
Cell1 R_a 10 = 53
Cell1 R_a 11 = 74
Cell1 R_a 12 = 222
Cell1 R_a 13 = 1805
Cell1 R_a 14 = 7836
[R_a2(Ra Table)]
Cell2 R_a flag = FF55
Cell2 R_a 0 = 66
Cell2 R_a 1 = 71
Cell2 R_a 2 = 80
Cell2 R_a 3 = 111
Cell2 R_a 4 = 94
Cell2 R_a 5 = 74
Cell2 R_a 6 = 82
Cell2 R_a 7 = 75
Cell2 R_a 8 = 80
Cell2 R_a 9 = 92
Cell2 R_a 10 = 145
Cell2 R_a 11 = 234
Cell2 R_a 12 = 628
Cell2 R_a 13 = 5236
Cell2 R_a 14 = 22706
[R_a3(Ra Table)]
Cell3 R_a flag = FF55
Cell3 R_a 0 = 66
Cell3 R_a 1 = 71
Cell3 R_a 2 = 80
Cell3 R_a 3 = 111
Cell3 R_a 4 = 94
Cell3 R_a 5 = 74
Cell3 R_a 6 = 82
Cell3 R_a 7 = 75
Cell3 R_a 8 = 80
Cell3 R_a 9 = 92
Cell3 R_a 10 = 145
Cell3 R_a 11 = 234
Cell3 R_a 12 = 628
Cell3 R_a 13 = 5236
Cell3 R_a 14 = 22706
[R_a0x(Ra Table)]
xCell0 R_a flag = 0055
xCell0 R_a 0 = 35
xCell0 R_a 1 = 37
xCell0 R_a 2 = 41
xCell0 R_a 3 = 49
xCell0 R_a 4 = 35
xCell0 R_a 5 = 35
xCell0 R_a 6 = 42
xCell0 R_a 7 = 31
xCell0 R_a 8 = 118
xCell0 R_a 9 = 118
xCell0 R_a 10 = 184
xCell0 R_a 11 = 310
xCell0 R_a 12 = 770
xCell0 R_a 13 = 6385
xCell0 R_a 14 = 27791
[R_a1x(Ra Table)]
xCell1 R_a flag = 0055
xCell1 R_a 0 = 32
xCell1 R_a 1 = 33
xCell1 R_a 2 = 38
xCell1 R_a 3 = 46
xCell1 R_a 4 = 32
xCell1 R_a 5 = 31
xCell1 R_a 6 = 38
xCell1 R_a 7 = 1
xCell1 R_a 8 = 25
xCell1 R_a 9 = 25
xCell1 R_a 10 = 51
xCell1 R_a 11 = 72
xCell1 R_a 12 = 215
xCell1 R_a 13 = 1749
xCell1 R_a 14 = 7591
[R_a2x(Ra Table)]
xCell2 R_a flag = FFFF
xCell2 R_a 0 = 66
xCell2 R_a 1 = 71
xCell2 R_a 2 = 80
xCell2 R_a 3 = 111
xCell2 R_a 4 = 94
xCell2 R_a 5 = 74
xCell2 R_a 6 = 82
xCell2 R_a 7 = 75
xCell2 R_a 8 = 80
xCell2 R_a 9 = 92
xCell2 R_a 10 = 145
xCell2 R_a 11 = 234
xCell2 R_a 12 = 628
xCell2 R_a 13 = 5236
xCell2 R_a 14 = 22706
[R_a3x(Ra Table)]
xCell3 R_a flag = FFFF
xCell3 R_a 0 = 66
xCell3 R_a 1 = 71
xCell3 R_a 2 = 80
xCell3 R_a 3 = 111
xCell3 R_a 4 = 94
xCell3 R_a 5 = 74
xCell3 R_a 6 = 82
xCell3 R_a 7 = 75
xCell3 R_a 8 = 80
xCell3 R_a 9 = 92
xCell3 R_a 10 = 145
xCell3 R_a 11 = 234
xCell3 R_a 12 = 628
xCell3 R_a 13 = 5236
xCell3 R_a 14 = 22706

[Manufacturer Data(System Data)]
ManufacturerInfo = EXXXXXX-XXX
[Integrity(System Data)]
Data Flash Checksum = 0000

[Data(SBS Configuration)]
Remaining AH Cap. Alarm = 300
Remaining WH Cap. Alarm = 432
Remaining Time Alarm = 10
Initial Battery Mode = 0081
Design Voltage = 7200
Specification Information = 0031
Manufacture Date = 09-Sep-2020
Serial Number = 0030
Cycle Count = 16
Cycle Count Percentage = 100
Max Error Limit = 100
Design Capacity mAh = 2500
Design Capacity cWh = 1800
Manufacturer Name = Medtronic
Device Name = PT00112272
Device Chemistry = LION
[FD(SBS Configuration)]
Set Voltage Threshold = 3000
Clear Voltage Threshold = 3100
Set % RSOC Threshold = 0
Clear % RSOC Threshold = 5
[FC(SBS Configuration)]
Set Voltage Threshold = 4200
Clear Voltage Threshold = 4100
Set % RSOC Threshold = 100
Clear % RSOC Threshold = 95
[TDA(SBS Configuration)]
Set Voltage Threshold = 2900
Clear Voltage Threshold = 3000
Set % RSOC Threshold = 10
Clear % RSOC Treshold = 15
[TCA(SBS Configuration)]
Set Voltage Threshold = 4250
Clear Voltage Threshold = 4125
Set % RSOC Threshold = 100
Clear % RSOC Threshold = 95
[Max Error(SBS Configuration)]
Time Cycle Equivalent = 254
Cycle Delta = 0.05

[CUV(Protections)]
Threshold = 2800
Delay = 10
Recovery = 3200
[CUVC(Protections)]
Threshold = 2900
Delay = 6
Recovery = 3200
[COV(Protections)]
Threshold Low Temp = 4200
Threshold Standard Temp = 4250
Threshold High Temp = 4250
Threshold Rec Temp = 4250
Delay = 2
Recovery Low Temp = 4000
Recovery Standard Temp = 4050
Recovery High Temp = 4050
Recovery Rec Temp = 4050
[OCC1(Protections)]
Threshold = 2000
Delay = 6
[OCC2(Protections)]
Threshold = 2500
Delay = 3
[OCC(Protections)]
Recovery Threshold = 50
Recovery Delay = 5
[OCD1(Protections)]
Threshold = -16000
Delay = 10
[OCD2(Protections)]
Threshold = -20000
Delay = 6
[OCD(Protections)]
Recovery Threshold = -50
Recovery Delay = 5
[OLD(Protections)]
Threshold = 0F
Delay = 0F
Latch Limit = 0
Counter Dec Delay = 10
Recovery = 5
Reset = 15
[SCC(Protections)]
Threshold = 10
Latch Limit = 0
Counter Dec Delay = 10
Recovery = 5
Reset = 15
[SCD1(Protections)]
Threshold = 73
[SCD2(Protections)]
Threshold = 34
[SCD(Protections)]
Latch Limit = 0
Counter Dec Delay = 10
Recovery = 5
Reset = 15
[OTC(Protections)]
Threshold = 55.0
Delay = 2
Recovery = 50.0
[OTD(Protections)]
Threshold = 60.0
Delay = 2
Recovery = 55.0
[OTF(Protections)]
Threshold = 80.0
Delay = 2
Recovery = 65.0
[HWD(Protections)]
Delay = 10
[PTO(Protections)]
Charge Threshold = 1150
Suspend Threshold = 1000
Delay = 1800
Reset = 2
[CTO(Protections)]
Charge Threshold = 2500
Suspend Threshold = 2000
Delay = 14400
Reset = 2
[OC(Protections)]
Threshold = 350
Recovery = 2
RSOC Recovery = 90
[CHGV(Protections)]
Threshold = 500
Delay = 30
Recovery = -500
[CHGC(Protections)]
Threshold = 500
Delay = 2
Recovery = 100

[CUV(Permanent Fail)]
Threshold = 2000
Delay = 2
[COV(Permanent Fail)]
Threshold = 4300
Delay = 2
[CUDEP(Permanent Fail)]
Threshold = 2000
Delay = 2
[OTCE(Permanent Fail)]
Threshold = 65.0
Delay = 2
[OTF(Permanent Fail)]
Threshold = 90.0
Delay = 2
[CB(Permanent Fail)]
Max Threshold = 240
Delta Threshold = 40
Delay = 2
[VIMR(Permanent Fail)]
Check Voltage = 3500
Check Current = 10
Delta Threshold = 200
Delta Delay = 2
Duration = 100
[VIMA(Permanent Fail)]
Check Voltage = 3700
Check Current = 50
Delta Threshold = 300
Delay = 2
[CD(Permanent Fail)]
Threshold = 1550
Delay = 2
[CFET(Permanent Fail)]
OFF Threshold = 20
OFF Delay = 2
[DFET(Permanent Fail)]
OFF Threshold = -20
OFF Delay = 2
[TH(Permanent Fail)]
ADC Delay = 10
[FUSE(Permanent Fail)]
Threshold = 5
Delay = 2
[AFER(Permanent Fail)]
Threshold = 100
Delay Period = 2
Compare Period = 5
[AFEC(Permanent Fail)]
Threshold = 100
Delay Period = 5
[2LVL(Permanent Fail)]
Delay = 2
[OCECO(Permanent Fail)]
Threshold = 5000
Delay = 2

[Device Status Data(PF Status)]
Safety Alert 0-15 = 0000
Safety Status 0-15 = 0000
PF Alert 0-15 = 0000
PF Status 0-15 = 0000
Safety Alert 16-31 = 0000
Safety Status 16-31 = 0000
PF Alert 16-31 = 0000
PF Status 16-31 = 0000
Operation Status 0-15 = 7101
Operation Status 16-31 = 0010
Charging Status 0-15 = 0208
Charging Status 16-23 = 00
Gauging Status = 0012
[Device Voltage Data(PF Status)]
Cell Voltage 0 = 3899
Cell Voltage 1 = 3916
Cell Voltage 2 = 0
Cell Voltage 3 = 0
Battery Direct Voltage = 15404
Pack Voltage = 119
[Device Current Data(PF Status)]
Current = 13
[Device Temperature Data(PF Status)]
Internal Temperature = 24.1
External 1 Temperature = 24.6
External 2 Temperature = 25.0
[Device Gauging Data(PF Status)]
Cell0 Dod0 = 3712
Cell1 Dod0 = 3456
Cell2 Dod0 = 0
Cell3 Dod0 = 0
Passed Charge = 0
[AFE Regs(PF Status)]
AFE Status = 00
AFE State Control = 00
AFE Control = 00
AFE Output Status = 00
AFE Function Control = 00
AFE Cell Select = 00
AFE OCDV = 0F
AFE OCDT = 0F
AFE SCC = 10
AFE SCD1 = 73
AFE SCD2 = 34
AFE REF TRIM = 0E

[Safety Status(Black Box)]
1st Status Status 0-15 = 0000
1st Safety Status 16-31 = 0000
1st Time to Next Event = 0
2nd Safety Status 0-15 = 0000
2nd Safety Status 16-31 = 0000
2nd Time to Next Event = 0
3rd Safety Status 0-15 = 0000
3rd Safety Status 16-31 = 0000
3rd Time to Next Event = 0
[PF Status(Black Box)]
1st PF Status 0-15 = 0000
1st PF Status 16-31 = 0000
1st Time to Next Event = 0
2nd PF Status 0-15 = 0000
2nd PF Status 16-31 = 0000
2nd Time to Next Event = 0
3rd PF Status 0-15 = 0000
3rd PF Status 16-31 = 0000
3rd Time to Next Event = 0

[Voltage(Lifetimes)]
Max Cell Voltage 0 = 4200
Max Cell Voltage 1 = 4200
Max Cell Voltage 2 = 0
Max Cell Voltage 3 = 0
Min Cell Voltage 0 = 2580
Min Cell Voltage 1 = 2640
Min Cell Voltage 2 = 0
Min Cell Voltage 3 = 0
Max Delta Cell Voltage = 60
[Current(Lifetimes)]
Max Charge Current = 1200
Max Discharge Current = 1200
Max Avg Dsg Current = 1200
Max Avg Dsg Power = 10
[Safety Events(Lifetimes)]
No Of Cov Events = 0
Last Cov Event = 0
No Of Cuv Events = 32
Last Cuv Event = 12
No Of Ocd1 Events = 0
Last Ocd1 Event = 0
No Of Ocd2 Events = 0
Last Ocd2 Event = 0
No Of Occ1 Events = 0
Last Occ1 Event = 0
No Of Occ2 Events = 0
Last Occ2 Event = 0
No Of Old Events = 0
Last Old Event = 0
No Of Scd Events = 0
Last Scd Event = 0
No Of Scc Events = 0
Last Scc Event = 0
No Of Otc Events = 0
Last Otc Event = 0
No Of Otd Events = 0
Last Otd Event = 0
No Of Otf Events = 0
Last Otf Event = 0
[Charging Events(Lifetimes)]
No Valid Charge Term = 8
Last Valid Charge Term = 12
[Gauging Events(Lifetimes)]
No Of Qmax Updates = 16
Last Qmax Update = 12
No Of Ra Updates = 304
Last Ra Update = 12
No Of Ra Disable = 8
Last Ra Disable = 12
[Power Events(Lifetimes)]
No Of Shutdowns = 4
[Cell Balancing(Lifetimes)]
Cb Time Cell 0 = 0
Cb Time Cell 1 = 2
Cb Time Cell 2 = 0
Cb Time Cell 3 = 0
[Temperature(Lifetimes)]
Max Temp Cell = 28
Min Temp Cell = 20
Max Delta Cell Temp = 3
Max Temp Int Sensor = 26
Min Temp Int Sensor = 18
Max Temp Fet = 27
[Time(Lifetimes)]
Total Fw Runtime = 816
Time Spent In UT = 0
Time Spent In LT = 0
Time Spent In STL = 0
Time Spent In RT = 776
Time Spent In STH = 34
Time Spent In HT = 0
Time Spent In OT = 0

[Fuse(Settings)]
PF Fuse 0-15 = 0000
PF Fuse 16-31 = 0000
Min Blow Fuse Voltage = 5000
[Manufacturing(Settings)]
Manufacturing Status = 01F8
[Protection(Settings)]
Enabled Protections 0-15 = FFFF
Enabled Protections 16-31 = FFFD
[Permanent Failure(Settings)]
Enabled PF 0-15 = EEFB
Enabled PF 16-31 = FFFF
[Configuration(Settings)]
Protection Configuration = 01
Temperature Configuration = 1087
Charging Configuration = 21
System Configuration = 0235
Gauging Configuration = 37DE
Sbs Configuration = 20
Sbs Data Config. 0-15 = 0C2F
Sbs Data Config. 16-23 = FF
[AFE(Settings)]
AFE State Control = 00

[Power(Power)]
Valid Update Voltage = 4500
[Shutdown(Power)]
Shutdown Voltage = 2600
Shutdown Time = 1
Charger Present Threshold = 3000
[Sleep(Power)]
Sleep Current = 10
Voltage Time = 5
Current Time = 20
Wake = 02
[Ship(Power)]
Delay = 1
[Power Off(Power)]
Timeout = 30
Debounce = 4

[Temperature Ranges(Advanced Charge Algorithm)]
T1 Temp = 0
T2 Temp = 12
T5 Temp = 20
T6 Temp = 25
T3 Temp = 50
T4 Temp = 55
Hysteresis Temp = 0
[Low Temp Charging(Advanced Charge Algorithm)]
Voltage = 4100
Current Low = 400
Current Med = 500
Current High = 600
[Standard Temp Charging(Advanced Charge Algorithm)]
Voltage = 4200
Current Low = 1150
Current Med = 1150
Current High = 1150
[High Temp Charging(Advanced Charge Algorithm)]
Voltage = 4200
Current Low = 1150
Current Med = 1150
Current High = 1150
[Rec Temp Charging(Advanced Charge Algorithm)]
Voltage = 4200
Current Low = 1150
Current Med = 1150
Current High = 1150
[Pre-Charging(Advanced Charge Algorithm)]
Current = 320
[Maintenance Charging(Advanced Charge Algorithm)]
Current = 320
[Voltage Range(Advanced Charge Algorithm)]
Charging Voltage Low = 2900
Charging Voltage Med = 3600
Charging Voltage High = 4000
Charging Voltage Hysteresis = 0
[Termination Config(Advanced Charge Algorithm)]
Charge Term Taper Current = 150
Charge Term Voltage = 75
[Cell Balancing Config(Advanced Charge Algorithm)]
Bal Time/mAh Cell 0 = 367
Bal Time/mAh Cell 1-3 = 514
Min Start Balance Delta = 10
Relax Balance Interval = 18000
Min Rsoc for Balancing = 50
[Charging Rate of Change(Advanced Charge Algorithm)]
Current Rate = 1
Voltage Rate = 1
[Charge Loss Compensation(Advanced Charge Algorithm)]
CCC Current Threshold = 2000
CCC Voltage Threshold = 4200

[Voltage(Calibration)]
Cell Scale 0 = 20568
Cell Scale 1 = 20618
Cell Scale 2 = 20520
Cell Scale 3 = 20517
Pack Gain = 54735
BAT Gain = 48546
[Current(Calibration)]
CC Gain = 1.724
Capacity Gain = 514143.469
[Current Offset(Calibration)]
CC Offset = -8233
Coulomb Counter Offset Samples = 64
Board Offset = 64
[Temperature(Calibration)]
Internal Temp Offset = 7.0
External1 Temp Offset = -1.0
External2 Temp Offset = -1.4
[Internal Temp Model(Calibration)]
Int Coeff 1 = 0
Int Coeff 2 = 0
Int Coeff 3 = -11136
Int Coeff 4 = 5754
Int Minimum AD = 0
Int Maximum Temp = 5754
[Cell Temperature Model(Calibration)]
Coeff a1 = -14520
Coeff a2 = 23696
Coeff a3 = -20298
Coeff a4 = 28073
Coeff a5 = 865
Coeff b1 = -694
Coeff b2 = 1326
Coeff b3 = -3880
Coeff b4 = 5127
Rc0 = 11703
Adc0 = 11703
Rpad = 0
Rint = 0
[Fet Temperature Model(Calibration)]
Coeff a1 = -14520
Coeff a2 = 23696
Coeff a3 = -20298
Coeff a4 = 28073
Coeff a5 = 865
Coeff b1 = -694
Coeff b2 = 1326
Coeff b3 = -3880
Coeff b4 = 5127
Rc0 = 11703
Adc0 = 11703
Rpad = 0
Rint = 0
[Filter(Calibration)]
Cell Voltage 1 = 145
Cell Voltage 2 = 145
Cell Voltage 3 = 145
Cell Voltage 4 = 145
Pack Voltage Out = 10
Direct Battery Voltage = 10
Summed Battery Voltage = 145
Cell Temperature = 145
FET Temperature = 145
[Current Deadband(Calibration)]
Deadband = 2
Coulomb Counter Deadband = 34

Hi Wyatt,

I am still having issues with attaching the files in this thread directly. I have used text code format to copy the gg file I used in this thread. Can you provide me with your email, so I can share the link with cycling logs data.

Sincerely,

Subrat  

Hello Subrat,

You may have to break the files into 2 section if they are very large, or just grab a block of the bad FCC update and good FCC update.

I would review your Gauging Configuration register and make sure that none of the enabled features could be causing the jump (either by holding ROSC or by actual simulation calculations)

Sincerely,

Wyatt Keller

E030 gg file.gg.xlsx

E030 cycling run 3 Maccor data -increased rest time-.014.xlsx

E030 cycling run 3 Maccor data -increased rest time-.014.xlsx

Hi Wyatt,

Attached is the Cycling data used along side all the smbus information including Gauging status and IT status register data as well as gg file. 

Hello Subrat,

I will review the data today and get back to you with further feedback.

Sincerely,

Wyatt Keller

Hi Wyatt,

I made the changes you suggested and performed with load select of 1. That did not resolve the issue. I found this on e2e thread from 4 years back where this customer was also having a very similar issue to what i am facing here and observing this FCC jump. Here is the link attached. Can you let me know how that situation was resolved.

e2e.ti.com/.../bq20z655-r1-rc-fcc-too-high-when-using-reserve-capacity-feature

Hello Subrat,

I would recommend that you start afresh. Import the GG file. set the correct reserve capacity, program chemistry and then run the learning cycle. I suspect that the gauge "learned" data based on the different reserve capacity. The learning process is complex and we may not be able to pinpoint the data that is causing issues.

Hi Shirish,

Thanks for the reply, Are you able to find how the issue in the link I posted below was resolved.

I am certain that solution should work in our case as well.

e2e.ti.com/.../bq20z655-r1-rc-fcc-too-high-when-using-reserve-capacity-feature

Hello Subrat,

There is no documentation available on how the other thread was resolved since it was handled privately.