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BQ34Z100 FCC and RC suddenly drops or goes to 0 after 19 cycles

Damian Wilczyński
Intellectual 285 points
Other Parts Discussed in Thread: BQ34Z100, 4213

Dear all,

Our fuel gauge works with LI-ION pack 20S20P or 20S10P and measuring voltage from lower 10 cells.

We were looking on forum but we cant find out what we do wrong.

Everything seems to be OK, we performed calibration and learning cycle. RC and SOC changes correctly and after some cycles SOH drop to 99% so it looks OK.

But after 19 cycles we find out that in one battery (20s20p) FCC and RC suddenly goes to 0.

Another problem is, that in other two smaller batteries (20s10p) when we charge it to max voltage (84V) FCC and RC drops 25 or 50%

first one (17 cycles):

RC = 1982 -> 1102

FCC = 2002 -> 1102

second one (14 cycles):

RC = 2003 -> 1571

FCC = 2006 -> 1571

Do you have any clue what is the reason of that behavior?

Could you look at enclosed gg file from 20s20p battery? Please change the extension of attached file to .gg.

  • 0
    TI__Guru 73830 points

    Damian,

     The first two Ra grid points are way out of line. We will need to know at what point that get so large. You could try changing these parameters back to their normal values to see if this corrects the problem. It will probably take additional cycles and data collection to determine how the values are getting so large.

    Tom

  • 0 in reply to ThomasCosby
    Intellectual 285 points

    Thomas,

    Thank you for reply, we will collect data from few cycles and write what happens.

    I have two more questions:

    First one:

    we are using LI-ION ICR18650-22p, for that marking Chem-ID is 0241, but Description of that Chem-ID says  NiCoMn/carbon. Do we choose right Chem-ID?

    Second one:

    I checked my calculations of Design Capacity and Design energy, and find out that they are incorrect. Is there posibility that this is the reason of my problem?

    Design Capacity: 4300 should be 4100

    Design Energy: 15695 should be 17220

    Becouse single cell have 2050 mAh and 4,2V

    Design Capacity = 20 cells * 2050 mAh = 41000 and after scalling by 10 DC = 4100

    Design Energy = 4100 (Design capacity) *42V (max measured pack voltage) / 10 (cells in series) = 17220

    Am I correct?

  • 0 in reply to Damian Wilczyński
    TI__Guru 73830 points

    Damian

    You have the Design Energy Scale set to 10, so the units are cWh. The Design Energy should be entered as 1722 cWh.

    Are you using a ~1 mohm sense resistor? I just wanted to confirm based on the current calibration data.

    I would export a gg file every 5 minutes and log data at a 2 sec rate when running the next profiles. This will provide more data for analysis.

    Tom

  • 0 in reply to ThomasCosby
    Intellectual 285 points

    Yes, we use 1 mohm resistor.

    I want back to calculating values for Design Capacity and Energy.

    we scale the Design Capacity by 10, do we need scale Desing energy again by 10?

    Design Capacity = 20 cells * 2050 mAh = 41000 mAh and after scalling by 10 DC = 4100 cAh

    Design Energy = 4100 cAh (Design capacity) *42V (max measured pack voltage) / 10 (cells in series) = 17220 cAh

    So, 17220 cAh or 1722 cAh is correct?

    for Design Energy calculation use maximum voltage or nominal voltage?

  • 0 in reply to Damian Wilczyński
    TI__Guru 73830 points

    Damian, 

    The device does not interpret mAh as cWh when you scale the current. It still thinks that you have a 4100 mAh pack. If you had the Design Energy scale set to 1, then the Design Energy would be 17220 mWh. 

    I have seen people use the max voltage and other use the design voltage (3.6V) for the calculation. I have not seen it make much difference. 

    Tom

  • 0 in reply to ThomasCosby
    Intellectual 285 points

    Thomas,

    I prepare more data for analysis, log and gg files are in enclosed archive. Could you look at them?

    Data from BQ34z100_BMS26.zip
  • 0 in reply to Damian Wilczyński
    TI__Guru 73830 points

    Damian,

    Do you still have the files used for the optimization cycle? If so, could you send them to me? Qmax looks too low for this pack, because the SOC reaches 0% well before the Termination Voltage is reached. If you can provide log file with a full, uninterrupted, discharge, then I can verify the ChemID and help with the optimization cycle.

    Tom

  • 0 in reply to ThomasCosby
    Intellectual 285 points

    Thomas,

    Thank you for analysis.

    Yes I have that file. (enclosed). I checked Termination voltage and pack protection settings. I think it's incorrect becouse we have UV Treshold set to 2,9 V.

    I should provide you data from uninterrupted discharge cycle today.

  • 0 in reply to Damian Wilczyński
    Intellectual 285 points

    Thomas,

    I provide data from one uninterrupted discharge cycle. Could you look at them?

    Battery was cut-off becouse of undervoltage on one cell. It happen becouse when I charge the battery I need to turn off balancing for logging data from bq34z100. I will turn on ballancing and charge battery without logging data.

    Data from BQ34z100_BMS26 discharge 26.zip
  • 0 in reply to Damian Wilczyński
    Intellectual 285 points

    Thomas,

    I have new data from discharge of the pack. Could you look at them?

    Damian.

    Data from BQ34z100_BMS26 discharge 27.zip
  • 0 in reply to Damian Wilczyński
    TI__Guru 73830 points

    Damian,

    These log files still do not discharge down to the Term Voltage. Do you want to discharge down to 27500mV?

    Tom

  • 0 in reply to ThomasCosby
    Intellectual 285 points

    Thomas,

    No, I want discharge down to 29000 mV. 

    Tommorow I'll send you a proper discharge cycle. We change settings according to earlier posts and now we are charging battery. After discharging I'll send log data.

    Best Regards, Damian

  • 0 in reply to Damian Wilczyński
    TI__Guru 73830 points

    Damian,

    You should change the Cell Termination Voltage to 2900 mV, so that the gauge will handle the end of discharge properly.

    Tom

  • 0 in reply to ThomasCosby
    Intellectual 285 points

    Thomas,

    Yes, I changed the Cell Termination Voltage to 2900 mV.

    Unfortunately I can't provide you proper data to analysis today like I said before. I'll send it probably in tuesday.

    Best Regards,

    Damian.

  • 0 in reply to Damian Wilczyński
    Intellectual 285 points

    Thomas,

    I send you files from discharge cycle from another battery, unfortunately this time discharge end's on 3,167 V. Could you look at those files?

    I'll do another cycle and see if the battery will discharge down to Termination Voltage.

    Best regards,

    Damian.

    Battery_09_Discharge.zip
  • 0 in reply to Damian Wilczyński
    Intellectual 285 points

    Thomas,

    I send you files from discharging battery below 3 V. Could you look at those log files?

    Best regards,

    Damian

    Discharging bat 09 20.10.2014.zip
  • 0 in reply to Damian Wilczyński
    TI__Guru 73830 points

    Damian

    The discharge data looks pretty good. The SOC reached 0% a little earlier than the Termination voltage, but this could be expected since the pack did not rest before the discharge started. Do you have concerns with this performance?

    Tom

  • 0 in reply to ThomasCosby
    Intellectual 285 points

    Thomas

    Thank you for analysis. We need some time to do the tests becouse last problems occurs after about 20 cycles.

    Before doing more cycles I want to be sure that all settings are correct, so I have one more question:

    We are using LI-ION ICR18650-22p, for that marking Chem-ID is 0241, but Description of that Chem-ID says NiCoMn/carbon. Do we choose right Chem-ID?

    Best regards,

    Damian.

  • 0 in reply to Damian Wilczyński
    TI__Guru 73830 points

    ChemID 241 is a older characterization and this cell has been re-characterized more recently. ChemID 2002 is the most recent release. ChemID 2021 was released for the ICR18650-22PM cell. I checked the OCV table for these two ChemIDs and they are close, but the series resistances are different.

  • 0 in reply to ThomasCosby
    Intellectual 285 points

    Which one will be the best for use right now?

  • 0 in reply to Damian Wilczyński
    TI__Guru 73830 points

    I would use ChemID 2002.

  • 0 in reply to Damian Wilczyński
    TI__Guru 73830 points

    Damian

    The data continues to look better. Send the new log file to me and I will check it with the Mathcad program.

    Tom

  • 0 in reply to ThomasCosby
    Intellectual 285 points

    Thomas

    I send you new log files with ChemID 2002. Could you look at them?

    I have another question:

    Our BMS work with two similar cells "ICR18650-22P" or "ICR18650 MF1" do we need diffrent settings for this two cells? What error could be expected, if we use the same settings?

    Best Regards,

    Damian

    BAT_09_Discharge_28.10.2014.zip
  • 0 in reply to Damian Wilczyński
    TI__Guru 73830 points

    Damian, 

    The gauging looked good. I checked the chemistry data for the ChemIDs 286 and 2002 and the discharge curves do diverge in the middle of the profile. You will see an accuracy hit if you use the same ChemID for both cells. 

    Tom

  • 0 in reply to ThomasCosby
    Intellectual 285 points

    Thomas,

    We would use different settings for each cell.

    Thank you for help. I'll give you feedback after tests.

    Best Regards,

    Damian

  • 0 in reply to Damian Wilczyński
    Intellectual 285 points

    Thomas,

    After tests we have a problem with one battery with 22P cells.

    BQ34z100 after 37 cycles shows 89% of SOH 36.3 Ah, end client can't approve this behaviour.

    We measured capacity with external logger and actual capacity of that battery is 41.53 Ah.

    Could you look at 3 enclosed 3 gg files:

    1. Source - file used to programming device

    2. BAT_11 - file from faulty battery

    3. BAT_12 - file from battery that shows SOH SOC correctly

    source.gg.txt 
    [Header]
bq EVSW Version = 0.9.90	
DeviceName = bq34z100 v0.06
Time = 2014-10-31 10:57:35	


[Safety(Configuration)]
OT Chg = 55.0
OT Chg Time = 2
OT Chg Recovery = 50.0
OT Dsg = 60.0
OT Dsg Time = 2
OT Dsg Recovery = 55.0
[Charge Inhibit Cfg(Configuration)]
Chg Inhibit Temp Low = 0.0
Chg Inhibit Temp High = 45.0
Temp Hys = 5.0
[Charge(Configuration)]
Suspend Low Temp = -5.0
Suspend High Temp = 55.0
[Charge Termination(Configuration)]
Taper Current = 100
Min Taper Capacity = 25
Cell Taper Voltage = 100
Current Taper Window = 40
TCA Set % = 99
TCA Clear % = 95
FC Set % = 100
FC Clear % = 98
DODatEOC Delta T = 10.0
[Data(Configuration)]
Rem Cap Alarm = 430
Initial Standby = -10
Initial MaxLoad = -1000
Manuf Date = 16-wrz-2013
Ser. Num. = 0001
Cycle Count = 0
CC Threshold = 3690
Design Capacity = 4100
Design Energy = 14842
SOH Load I = -800
TDD SOH Percent = 90
Cell Charge Voltage T1-T2 = 4200
Cell Charge Voltage T2-T3 = 4200
Cell Charge Voltage T3-T4 = 4100
Charge Current T1-T2 = 100
Charge Current T2-T3 = 100
Charge Current T3-T4 = 50
JEITA T1 = 0
JEITA T2 = 10
JEITA T3 = 35
JEITA T4 = 45
ISD Current = 10
ISD I Filter = 127
Min ISD Time = 7
Design Energy Scale = 10
Device Name = bq34z100
Manufacturer Name = Texas Inst.
Device Chemistry = LION
[Discharge(Configuration)]
SOC1 Set Threshold = 430
SOC1 Clear Threshold = 752
SOCF Set Threshold = 322
SOCF Clear Threshold = 430
Cell BL Set Volt Threshold = 2750
Cell BL Set Volt Time = 2
Cell BL Clear Volt Threshold = 2900
Cell BH Set Volt Threshold = 4250
Cell BH Volt Time = 2
Cell BH Clear Volt Threshold = 4200
[Manufacturer Data(Configuration)]
Pack Lot Code = 0000
PCB Lot Code = 0000
Firmware Version = 0000
Hardware Revision = 0000
Cell Revision = 0000
DF Config Version = 0000
[Integrity Data(Configuration)]
Static Chem DF Checksum = 7215
[Lifetime Data(Configuration)]
Lifetime Max Temp = 31.0
Lifetime Min Temp = 10.0
Lifetime Max Chg Current = 0
Lifetime Max Dsg Current = -9944
Lifetime Max Pack Voltage = 41990
Lifetime Min Pack Voltage = 34440
[Lifetime Temp Samples(Configuration)]
LT Flash Cnt = 4
[Registers(Configuration)]
Pack Configuration = 09E1
Pack Configuration B = FF
Pack Configuration C = 30
LED_Comm Configuration = 00
Alert Configuration = 0000
Number of series cell = 10
[Lifetime Resolution(Configuration)]
LT Temp Res = 10.0
LT Cur Res = 200
LT V Res = 25
LT Update Time = 60
[LED Display(Configuration)]
LED Hold Time = 4
[Power(Configuration)]
Flash Update OK Cell Volt = 2800
Sleep Current = 10
FS Wait = 0

[Manufacturer Info(System Data)]
Block A 0 = 00
Block A 1 = 00
Block A 2 = 00
Block A 3 = 00
Block A 4 = 00
Block A 5 = 00
Block A 6 = 00
Block A 7 = 00
Block A 8 = 00
Block A 9 = 00
Block A 10 = 00
Block A 11 = 00
Block A 12 = 00
Block A 13 = 00
Block A 14 = 00
Block A 15 = 00
Block A 16 = 00
Block A 17 = 00
Block A 18 = 00
Block A 19 = 00
Block A 20 = 00
Block A 21 = 00
Block A 22 = 00
Block A 23 = 00
Block A 24 = 00
Block A 25 = 00
Block A 26 = 00
Block A 27 = 00
Block A 28 = 00
Block A 29 = 00
Block A 30 = 00
Block A 31 = 00

[IT Cfg(Gas Gauging)]
Load Select = 1
Load Mode = 1
Max Res Factor = 15
Min Res Factor = 3
Ra Filter = 500
Fast Qmax Start DOD % = 92
Fast Qmax End DOD % = 96
Fast Qmax Start Volt Delta = 200
Cell Terminate Voltage = 2900
Cell Term V Delta = 50
ResRelax Time = 200
User Rate-mA = 0
User Rate-Pwr = 0
Reserve Cap-mAh = 0
Reserve Energy = 0
Max Scale Back Grid = 4
Cell Max DeltaV = 200
Cell Min DeltaV = 0
Max Sim Rate = 2
Min Sim Rate = 20
Ra Max Delta = 44
Qmax Max Delta % = 5
Cell DeltaV Max Delta = 10
Fast Scale Start SOC = 10
Charge Hys V Shift = 40
[Current Thresholds(Gas Gauging)]
Dsg Current Threshold = 60
Chg Current Threshold = 75
Quit Current = 40
Dsg Relax Time = 60
Chg Relax Time = 60
Quit Relax Time = 1
Cell Max IR Correct = 400
[State(Gas Gauging)]
Qmax Cell 0 = 4100
Cycle Count = 0
Update Status = 06
Cell V at Chg Term = 4200
Avg I Last Run = -299
Avg P Last Run = -1131
Cell Delta Voltage = 15
T Rise = 20
T Time Constant = 1000

[OCVa Table(OCV Table)]
Chem ID = 2002

[R_a0(Ra Table)]
Cell0 R_a flag = FF55
Cell0 R_a 0 = 40
Cell0 R_a 1 = 56
Cell0 R_a 2 = 64
Cell0 R_a 3 = 83
Cell0 R_a 4 = 106
Cell0 R_a 5 = 53
Cell0 R_a 6 = 76
Cell0 R_a 7 = 64
Cell0 R_a 8 = 62
Cell0 R_a 9 = 59
Cell0 R_a 10 = 65
Cell0 R_a 11 = 69
Cell0 R_a 12 = 88
Cell0 R_a 13 = 161
Cell0 R_a 14 = 617
[R_a0x(Ra Table)]
xCell0 R_a flag = FFFF
xCell0 R_a 0 = 40
xCell0 R_a 1 = 56
xCell0 R_a 2 = 64
xCell0 R_a 3 = 83
xCell0 R_a 4 = 106
xCell0 R_a 5 = 53
xCell0 R_a 6 = 76
xCell0 R_a 7 = 64
xCell0 R_a 8 = 62
xCell0 R_a 9 = 59
xCell0 R_a 10 = 65
xCell0 R_a 11 = 69
xCell0 R_a 12 = 88
xCell0 R_a 13 = 161
xCell0 R_a 14 = 617

[Data(Calibration)]
CC Gain = 9.756
CC Delta = 9.737
CC Offset = -0.69
Board Offset = 0.51
Int Temp Offset = 0.0
Ext Temp Offset = 0.0
Voltage Divider = 56299
[Current(Calibration)]
Deadband = 5

[Codes(Security)]
Sealed to Unsealed = 36720414
Unsealed to Full = FFFFFFFF
Authen Key3 = 01234567
Authen Key2 = 89ABCDEF
Authen Key1 = FEDCBA98
Authen Key0 = 76543210

    BAT_11.gg.txt 
    [Header]
bq EVSW Version = 0.9.90	
DeviceName = bq34z100 v0.06
Time = 2014-12-10 10:52:47	


[Safety(Configuration)]
OT Chg = 55.0
OT Chg Time = 2
OT Chg Recovery = 50.0
OT Dsg = 60.0
OT Dsg Time = 2
OT Dsg Recovery = 55.0
[Charge Inhibit Cfg(Configuration)]
Chg Inhibit Temp Low = 0.0
Chg Inhibit Temp High = 45.0
Temp Hys = 5.0
[Charge(Configuration)]
Suspend Low Temp = -5.0
Suspend High Temp = 55.0
[Charge Termination(Configuration)]
Taper Current = 100
Min Taper Capacity = 25
Cell Taper Voltage = 100
Current Taper Window = 40
TCA Set % = 99
TCA Clear % = 95
FC Set % = 100
FC Clear % = 98
DODatEOC Delta T = 10.0
[Data(Configuration)]
Rem Cap Alarm = 430
Initial Standby = -10
Initial MaxLoad = -1000
Manuf Date = 16-wrz-2013
Ser. Num. = 0001
Cycle Count = 40
CC Threshold = 3690
Design Capacity = 4100
Design Energy = 14842
SOH Load I = -800
TDD SOH Percent = 90
Cell Charge Voltage T1-T2 = 4200
Cell Charge Voltage T2-T3 = 4200
Cell Charge Voltage T3-T4 = 4100
Charge Current T1-T2 = 100
Charge Current T2-T3 = 100
Charge Current T3-T4 = 50
JEITA T1 = 0
JEITA T2 = 10
JEITA T3 = 35
JEITA T4 = 45
ISD Current = 10
ISD I Filter = 127
Min ISD Time = 7
Design Energy Scale = 10
Device Name = bq34z100
Manufacturer Name = Texas Inst.
Device Chemistry = LION
[Discharge(Configuration)]
SOC1 Set Threshold = 430
SOC1 Clear Threshold = 752
SOCF Set Threshold = 322
SOCF Clear Threshold = 430
Cell BL Set Volt Threshold = 2750
Cell BL Set Volt Time = 2
Cell BL Clear Volt Threshold = 2900
Cell BH Set Volt Threshold = 4250
Cell BH Volt Time = 2
Cell BH Clear Volt Threshold = 4200
[Manufacturer Data(Configuration)]
Pack Lot Code = 0000
PCB Lot Code = 0000
Firmware Version = 0000
Hardware Revision = 0000
Cell Revision = 0000
DF Config Version = 0000
[Integrity Data(Configuration)]
Static Chem DF Checksum = 7215
[Lifetime Data(Configuration)]
Lifetime Max Temp = 39.9
Lifetime Min Temp = -39.2
Lifetime Max Chg Current = 2385
Lifetime Max Dsg Current = -13445
Lifetime Max Pack Voltage = 42170
Lifetime Min Pack Voltage = 30280
[Lifetime Temp Samples(Configuration)]
LT Flash Cnt = 27
[Registers(Configuration)]
Pack Configuration = 09E1
Pack Configuration B = FF
Pack Configuration C = 30
LED_Comm Configuration = 00
Alert Configuration = 0000
Number of series cell = 10
[Lifetime Resolution(Configuration)]
LT Temp Res = 10.0
LT Cur Res = 200
LT V Res = 25
LT Update Time = 60
[LED Display(Configuration)]
LED Hold Time = 4
[Power(Configuration)]
Flash Update OK Cell Volt = 2800
Sleep Current = 10
FS Wait = 0

[Manufacturer Info(System Data)]
Block A 0 = 00
Block A 1 = 00
Block A 2 = 00
Block A 3 = 00
Block A 4 = 00
Block A 5 = 00
Block A 6 = 00
Block A 7 = 00
Block A 8 = 00
Block A 9 = 00
Block A 10 = 00
Block A 11 = 00
Block A 12 = 00
Block A 13 = 00
Block A 14 = 00
Block A 15 = 00
Block A 16 = 00
Block A 17 = 00
Block A 18 = 00
Block A 19 = 00
Block A 20 = 00
Block A 21 = 00
Block A 22 = 00
Block A 23 = 00
Block A 24 = 00
Block A 25 = 00
Block A 26 = 00
Block A 27 = 00
Block A 28 = 00
Block A 29 = 00
Block A 30 = 00
Block A 31 = 00

[IT Cfg(Gas Gauging)]
Load Select = 1
Load Mode = 1
Max Res Factor = 15
Min Res Factor = 3
Ra Filter = 500
Fast Qmax Start DOD % = 92
Fast Qmax End DOD % = 96
Fast Qmax Start Volt Delta = 200
Cell Terminate Voltage = 2900
Cell Term V Delta = 50
ResRelax Time = 200
User Rate-mA = 0
User Rate-Pwr = 0
Reserve Cap-mAh = 0
Reserve Energy = 0
Max Scale Back Grid = 4
Cell Max DeltaV = 200
Cell Min DeltaV = 0
Max Sim Rate = 2
Min Sim Rate = 20
Ra Max Delta = 44
Qmax Max Delta % = 5
Cell DeltaV Max Delta = 10
Fast Scale Start SOC = 10
Charge Hys V Shift = 40
[Current Thresholds(Gas Gauging)]
Dsg Current Threshold = 60
Chg Current Threshold = 75
Quit Current = 40
Dsg Relax Time = 60
Chg Relax Time = 60
Quit Relax Time = 1
Cell Max IR Correct = 400
[State(Gas Gauging)]
Qmax Cell 0 = 3684
Cycle Count = 1
Update Status = 06
Cell V at Chg Term = 4192
Avg I Last Run = -3878
Avg P Last Run = -1417
Cell Delta Voltage = 3
T Rise = 20
T Time Constant = 1000

[OCVa Table(OCV Table)]
Chem ID = 2002

[R_a0(Ra Table)]
Cell0 R_a flag = 0000
Cell0 R_a 0 = 82
Cell0 R_a 1 = 110
Cell0 R_a 2 = 36
Cell0 R_a 3 = 28
Cell0 R_a 4 = 23
Cell0 R_a 5 = 33
Cell0 R_a 6 = 53
Cell0 R_a 7 = 64
Cell0 R_a 8 = 63
Cell0 R_a 9 = 60
Cell0 R_a 10 = 62
Cell0 R_a 11 = 72
Cell0 R_a 12 = 53
Cell0 R_a 13 = 20
Cell0 R_a 14 = 73
[R_a0x(Ra Table)]
xCell0 R_a flag = 0055
xCell0 R_a 0 = 82
xCell0 R_a 1 = 110
xCell0 R_a 2 = 36
xCell0 R_a 3 = 28
xCell0 R_a 4 = 23
xCell0 R_a 5 = 33
xCell0 R_a 6 = 53
xCell0 R_a 7 = 64
xCell0 R_a 8 = 63
xCell0 R_a 9 = 60
xCell0 R_a 10 = 62
xCell0 R_a 11 = 72
xCell0 R_a 12 = 53
xCell0 R_a 13 = 26
xCell0 R_a 14 = 95

[Data(Calibration)]
CC Gain = 9.756
CC Delta = 9.737
CC Offset = -0.69
Board Offset = 0.51
Int Temp Offset = 0.0
Ext Temp Offset = -1.3
Voltage Divider = 56299
[Current(Calibration)]
Deadband = 5

[Codes(Security)]
Sealed to Unsealed = 36720414
Unsealed to Full = FFFFFFFF
Authen Key3 = 01234567
Authen Key2 = 89ABCDEF
Authen Key1 = FEDCBA98
Authen Key0 = 76543210

    BAT_12.gg.txt 
    [Header]
bq EVSW Version = 0.9.90	
DeviceName = bq34z100 v0.06
Time = 2014-12-10 10:08:59	


[Safety(Configuration)]
OT Chg = 55.0
OT Chg Time = 2
OT Chg Recovery = 50.0
OT Dsg = 60.0
OT Dsg Time = 2
OT Dsg Recovery = 55.0
[Charge Inhibit Cfg(Configuration)]
Chg Inhibit Temp Low = 0.0
Chg Inhibit Temp High = 45.0
Temp Hys = 5.0
[Charge(Configuration)]
Suspend Low Temp = -5.0
Suspend High Temp = 55.0
[Charge Termination(Configuration)]
Taper Current = 100
Min Taper Capacity = 25
Cell Taper Voltage = 100
Current Taper Window = 40
TCA Set % = 99
TCA Clear % = 95
FC Set % = 100
FC Clear % = 98
DODatEOC Delta T = 10.0
[Data(Configuration)]
Rem Cap Alarm = 430
Initial Standby = -10
Initial MaxLoad = -1000
Manuf Date = 16-wrz-2013
Ser. Num. = 0001
Cycle Count = 30
CC Threshold = 3690
Design Capacity = 4100
Design Energy = 14842
SOH Load I = -800
TDD SOH Percent = 90
Cell Charge Voltage T1-T2 = 4200
Cell Charge Voltage T2-T3 = 4200
Cell Charge Voltage T3-T4 = 4100
Charge Current T1-T2 = 100
Charge Current T2-T3 = 100
Charge Current T3-T4 = 50
JEITA T1 = 0
JEITA T2 = 10
JEITA T3 = 35
JEITA T4 = 45
ISD Current = 10
ISD I Filter = 127
Min ISD Time = 7
Design Energy Scale = 10
Device Name = bq34z100
Manufacturer Name = Texas Inst.
Device Chemistry = LION
[Discharge(Configuration)]
SOC1 Set Threshold = 430
SOC1 Clear Threshold = 752
SOCF Set Threshold = 322
SOCF Clear Threshold = 430
Cell BL Set Volt Threshold = 2750
Cell BL Set Volt Time = 2
Cell BL Clear Volt Threshold = 2900
Cell BH Set Volt Threshold = 4250
Cell BH Volt Time = 2
Cell BH Clear Volt Threshold = 4200
[Manufacturer Data(Configuration)]
Pack Lot Code = 0000
PCB Lot Code = 0000
Firmware Version = 0000
Hardware Revision = 0000
Cell Revision = 0000
DF Config Version = 0000
[Integrity Data(Configuration)]
Static Chem DF Checksum = 7215
[Lifetime Data(Configuration)]
Lifetime Max Temp = 50.6
Lifetime Min Temp = 10.0
Lifetime Max Chg Current = 2352
Lifetime Max Dsg Current = -9944
Lifetime Max Pack Voltage = 42030
Lifetime Min Pack Voltage = 30890
[Lifetime Temp Samples(Configuration)]
LT Flash Cnt = 31
[Registers(Configuration)]
Pack Configuration = 09E1
Pack Configuration B = FF
Pack Configuration C = 30
LED_Comm Configuration = 00
Alert Configuration = 0000
Number of series cell = 10
[Lifetime Resolution(Configuration)]
LT Temp Res = 10.0
LT Cur Res = 200
LT V Res = 25
LT Update Time = 60
[LED Display(Configuration)]
LED Hold Time = 4
[Power(Configuration)]
Flash Update OK Cell Volt = 2800
Sleep Current = 10
FS Wait = 0

[Manufacturer Info(System Data)]
Block A 0 = 00
Block A 1 = 00
Block A 2 = 00
Block A 3 = 00
Block A 4 = 00
Block A 5 = 00
Block A 6 = 00
Block A 7 = 00
Block A 8 = 00
Block A 9 = 00
Block A 10 = 00
Block A 11 = 00
Block A 12 = 00
Block A 13 = 00
Block A 14 = 00
Block A 15 = 00
Block A 16 = 00
Block A 17 = 00
Block A 18 = 00
Block A 19 = 00
Block A 20 = 00
Block A 21 = 00
Block A 22 = 00
Block A 23 = 00
Block A 24 = 00
Block A 25 = 00
Block A 26 = 00
Block A 27 = 00
Block A 28 = 00
Block A 29 = 00
Block A 30 = 00
Block A 31 = 00

[IT Cfg(Gas Gauging)]
Load Select = 1
Load Mode = 1
Max Res Factor = 15
Min Res Factor = 3
Ra Filter = 500
Fast Qmax Start DOD % = 92
Fast Qmax End DOD % = 96
Fast Qmax Start Volt Delta = 200
Cell Terminate Voltage = 2900
Cell Term V Delta = 50
ResRelax Time = 200
User Rate-mA = 0
User Rate-Pwr = 0
Reserve Cap-mAh = 0
Reserve Energy = 0
Max Scale Back Grid = 4
Cell Max DeltaV = 200
Cell Min DeltaV = 0
Max Sim Rate = 2
Min Sim Rate = 20
Ra Max Delta = 44
Qmax Max Delta % = 5
Cell DeltaV Max Delta = 10
Fast Scale Start SOC = 10
Charge Hys V Shift = 40
[Current Thresholds(Gas Gauging)]
Dsg Current Threshold = 60
Chg Current Threshold = 75
Quit Current = 40
Dsg Relax Time = 60
Chg Relax Time = 60
Quit Relax Time = 1
Cell Max IR Correct = 400
[State(Gas Gauging)]
Qmax Cell 0 = 4313
Cycle Count = 23
Update Status = 06
Cell V at Chg Term = 4200
Avg I Last Run = -3128
Avg P Last Run = -1148
Cell Delta Voltage = 5
T Rise = 20
T Time Constant = 1000

[OCVa Table(OCV Table)]
Chem ID = 2002

[R_a0(Ra Table)]
Cell0 R_a flag = 0000
Cell0 R_a 0 = 46
Cell0 R_a 1 = 62
Cell0 R_a 2 = 30
Cell0 R_a 3 = 21
Cell0 R_a 4 = 13
Cell0 R_a 5 = 6
Cell0 R_a 6 = 17
Cell0 R_a 7 = 18
Cell0 R_a 8 = 17
Cell0 R_a 9 = 17
Cell0 R_a 10 = 15
Cell0 R_a 11 = 17
Cell0 R_a 12 = 17
Cell0 R_a 13 = 18
Cell0 R_a 14 = 77
[R_a0x(Ra Table)]
xCell0 R_a flag = 0055
xCell0 R_a 0 = 46
xCell0 R_a 1 = 62
xCell0 R_a 2 = 30
xCell0 R_a 3 = 21
xCell0 R_a 4 = 16
xCell0 R_a 5 = 7
xCell0 R_a 6 = 21
xCell0 R_a 7 = 22
xCell0 R_a 8 = 21
xCell0 R_a 9 = 21
xCell0 R_a 10 = 18
xCell0 R_a 11 = 21
xCell0 R_a 12 = 21
xCell0 R_a 13 = 22
xCell0 R_a 14 = 95

[Data(Calibration)]
CC Gain = 9.756
CC Delta = 9.737
CC Offset = -0.69
Board Offset = 0.51
Int Temp Offset = 0.0
Ext Temp Offset = -1.3
Voltage Divider = 56299
[Current(Calibration)]
Deadband = 5

[Codes(Security)]
Sealed to Unsealed = 36720414
Unsealed to Full = FFFFFFFF
Authen Key3 = 01234567
Authen Key2 = 89ABCDEF
Authen Key1 = FEDCBA98
Authen Key0 = 76543210

    Another thing is that after charging that battery (11) to SOC = 100% after weekend SOC drops to 72% and RC drops from 36.3 Ah to 25.83 Ah.

    Below you have voltages on each cell just after charging and after weekend. BQ measure voltage of first 10 cells.

    U after charging [mV] U after weekend[mV] delta [mV]
    cell 1:   4236 4156 80
    cell 2:   4213 4152 61
    cell 3:   4228 4165 63
    cell 4:   4217 4154 63
    cell 5:   4229 4167 62
    cell 6:   4217 4154 63
    cell 7:   4228 4165 63
    cell 8:   4220 4157 63
    cell 9:   4234 4171 63
    cell 10: 4221 4156 65
    cell 11: 4178 4124 54
    cell 12: 4175 4120 55
    cell 13: 4181 4129 52
    cell 14: 4182 4127 55
    cell 15: 4180 4128 52
    cell 16: 4177 4122 55
    cell 17: 4187 4133 54
    cell 18: 4180 4125 55
    cell 19: 4186 4132 54
    cell 20: 4181 4124 57
    Pack Voltage:  84050 82861 1189
    Pack SOC in [%]: 100 72
    Pack SOH in [%]: 89 89
  • 0 in reply to Damian Wilczyński
    TI__Guru 73830 points
    Damian,
    The main differences that I see between bad file and the good file are that the pack was operated at a lower temperature, Qmax is about 10% lower and the Ra table values are higher. All of these factors will affect FCC, RM and SOC. Also, there is a firmware bug that has the SOH formula use the ambient temperature instead of using FCC @ 25 degC. This can affect the SOH value. One area of concern are the Ra table values in the source.gg file. They do not match the Ra table values for ChemID 2002. If the ChemID is not set properly, then this can affect everything. Can you export a senc file and send it me for analysis? You can place the device into ROM mode and use the export feature at the bottom of the page on the I2C Pro screen. You can press the execute button after the export to return the device to normal mode.
    Tom
  • 0 in reply to ThomasCosby
    Intellectual 285 points

    Thank you for quick reply,

    I can't export senc file for you right now, I'll provide it later.

    I think the reason will be wrong Ra table. I've update chemID in other battery, and Ra table look like this:

    88
    98
    107
    146
    168
    90
    130
    90
    86
    80
    82
    101
    109
    178
    1065

    Is that correct with chemID 2002 for 22P cells?

    I compared those values with values from "good file - BAT_12" and I'm confused, becouse is a large difference between them.

    I should use settings from "good file - BAT_12" or use original settings from ChemID 2002? What can you reccomend?

     

    Best regards,

    Damian

     

  • 0 in reply to Damian Wilczyński
    TI__Guru 73830 points
    Those are the correct Ra table values for ChemID 2002. You should use the values from the good pack, if they were updated from the optimization cycle.