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Negative Value in Ra Table

Other Parts Discussed in Thread: BQ20Z70

[Header]
bq EVSW Version = 0.9.59	
DeviceName = bq20z70 v1.60
Time = 1/7/2013 12:56:37 PM	


[Voltage(1st Level Safety)]
COV Threshold = 4300
COV Recovery = 4100
CUV Threshold = 2300
CUV Recovery = 3000
[Current(1st Level Safety)]
OC (1st Tier) Chg = 3000
OC (1st Tier) Dsg = 3000
Current Recovery Time = 8
AFE OC Dsg = 05
AFE OC Dsg Time = 0F
AFE SC Chg Cfg = 74
AFE SC Dsg Cfg = 74
[Temperature(1st Level Safety)]
Over Temp Chg = 55.0
OT Chg Recovery = 50.0
Over Temp Dsg = 60.0
OT Dsg Recovery = 55.0

[Voltage(2nd Level Safety)]
SOV Threshold = 13200
SOV Time = 5
Cell Imbalance Current = 5
Cell Imbalance Fail Voltage = 1000
Cell Imbalance Time = 5
Battery Rest Time = 1800
Min CIM-check voltage = 3000
PFIN Detect Time = 0
[Current(2nd Level Safety)]
SOC Chg = 10400
SOC Chg Time = 1
SOC Dsg = 13000
SOC Dsg Time = 1
[Temperature(2nd Level Safety)]
SOT Chg = 75.0
SOT Chg Time = 5
SOT Dsg = 75.0
SOT Dsg Time = 5
[FET Verification(2nd Level Safety)]
FET Fail Time = 5
[AFE Verification(2nd Level Safety)]
AFE Check Time = 0
AFE Fail Limit = 10

[Charge Inhibit Cfg(Charge Control)]
Chg Inhibit Temp Low = 0.0
Chg Inhibit Temp High = 60.0
Temp Hys = 5.0
[Pre-Charge Cfg(Charge Control)]
Pre-chg Current = 260
Pre-chg Temp = 12.0
Pre-chg Voltage = 3000
Recovery Voltage = 3100
[Fast Charge Cfg(Charge Control)]
Fast Charge Current = 2000
Charging Voltage = 12600
Suspend Low Temp = 0.0
Suspend High Temp = 70.0
[Termination Cfg.(Charge Control)]
Taper Current = 260
Taper Voltage = 225
TCA Clear % = 95
FC Clear % = 98
[Cell Balancing Cfg(Charge Control)]
Min Cell Deviation = 1750
[Charging Faults(Charge Control)]
Over Charge Capacity = 520

[Data(SBS Configuration)]
Rem Cap Alarm = 260
Rem Energy Alarm = 2800
Rem Time Alarm = 10
Init Battery Mode = 0081
Design Voltage = 12600
Spec Info = 0031
Manuf Date = 06-Dec-2012
Ser. Num. = 0001
Cycle Count = 0
CC Threshold = 4680
CF MaxError Limit = 100
Design Capacity = 5200
Design Energy = 56150
Manuf Name = AAAAA
Device Name = DUI
Device Chemistry = NCA
[Configuration(SBS Configuration)]
TDA Set % = 6
TDA Clear % = 8
FD Set % = 2
FD Clear % = 5
TDA Set Volt Threshold = 5000
TDA Set Volt Time = 0
TDA Clear Volt = 5500

[Manufacturer Info(System Data)]
Manuf. Info = 
[Lifetime Data(System Data)]
Lifetime Max Temp = 34.5
Lifetime Min Temp = 12.8

[Registers(Configuration)]
Operation Cfg A = 0229
Operation Cfg B = 6448
Operation Cfg C = 0000
Permanent Fail Cfg = 0000
Non-Removable Cfg = 0000
[AFE(Configuration)]
AFE.State_CTL = 00

[Power(Power)]
Flash Update OK Voltage = 7500
Shutdown Voltage = 7000
Cell Shutdown Voltage = 1750
Charger Present = 3000
Sleep Current = 10
Wake Current Reg = 00

[IT Cfg(Gas Gauging)]
Load Select = 1
Load Mode = 1
Term Voltage = 9000
User Rate-mA = 0
User Rate-mW = 0
Reserve Cap-mAh = 0
Reserve Cap-mWh = 0
[Current Thresholds(Gas Gauging)]
Dsg Current Threshold = 50
Chg Current Threshold = 25
Quit Current = 10
[State(Gas Gauging)]
Qmax Cell 0 = 5120
Qmax Cell 1 = 5130
Qmax Cell 2 = 5138
Qmax Cell 3 = 5000
Qmax Pack = 5120
Update Status = 02
Delta Voltage = 0

[R_a0(Ra Table)]
Cell0 R_a flag = 0055
Cell0 R_a 0 = 79
Cell0 R_a 1 = 116
Cell0 R_a 2 = 152
Cell0 R_a 3 = 176
Cell0 R_a 4 = 180
Cell0 R_a 5 = 171
Cell0 R_a 6 = 193
Cell0 R_a 7 = 315
Cell0 R_a 8 = 369
Cell0 R_a 9 = 459
Cell0 R_a 10 = 555
Cell0 R_a 11 = 631
Cell0 R_a 12 = 866
Cell0 R_a 13 = 1331
Cell0 R_a 14 = 1939
[R_a1(Ra Table)]
Cell1 R_a flag = 0055
Cell1 R_a 0 = 13
Cell1 R_a 1 = 14
Cell1 R_a 2 = 43
Cell1 R_a 3 = 74
Cell1 R_a 4 = 78
Cell1 R_a 5 = 85
Cell1 R_a 6 = 82
Cell1 R_a 7 = 89
Cell1 R_a 8 = 124
Cell1 R_a 9 = 159
Cell1 R_a 10 = 186
Cell1 R_a 11 = 227
Cell1 R_a 12 = 616
Cell1 R_a 13 = 227
Cell1 R_a 14 = -1908
[R_a2(Ra Table)]
Cell2 R_a flag = 0000
Cell2 R_a 0 = 18
Cell2 R_a 1 = 55
Cell2 R_a 2 = 93
Cell2 R_a 3 = 122
Cell2 R_a 4 = 127
Cell2 R_a 5 = 119
Cell2 R_a 6 = 136
Cell2 R_a 7 = 249
Cell2 R_a 8 = 298
Cell2 R_a 9 = 380
Cell2 R_a 10 = 465
Cell2 R_a 11 = 525
Cell2 R_a 12 = 572
Cell2 R_a 13 = 880
Cell2 R_a 14 = 1282
[R_a3(Ra Table)]
Cell3 R_a flag = FF55
Cell3 R_a 0 = 160
Cell3 R_a 1 = 166
Cell3 R_a 2 = 153
Cell3 R_a 3 = 151
Cell3 R_a 4 = 145
Cell3 R_a 5 = 152
Cell3 R_a 6 = 176
Cell3 R_a 7 = 204
Cell3 R_a 8 = 222
Cell3 R_a 9 = 254
Cell3 R_a 10 = 315
Cell3 R_a 11 = 437
Cell3 R_a 12 = 651
Cell3 R_a 13 = 1001
Cell3 R_a 14 = 1458
[R_a0x(Ra Table)]
xCell0 R_a flag = FFFF
xCell0 R_a 0 = 160
xCell0 R_a 1 = 166
xCell0 R_a 2 = 153
xCell0 R_a 3 = 151
xCell0 R_a 4 = 145
xCell0 R_a 5 = 152
xCell0 R_a 6 = 176
xCell0 R_a 7 = 204
xCell0 R_a 8 = 222
xCell0 R_a 9 = 254
xCell0 R_a 10 = 315
xCell0 R_a 11 = 437
xCell0 R_a 12 = 651
xCell0 R_a 13 = 1001
xCell0 R_a 14 = 1458
[R_a1x(Ra Table)]
xCell1 R_a flag = FFFF
xCell1 R_a 0 = 160
xCell1 R_a 1 = 166
xCell1 R_a 2 = 153
xCell1 R_a 3 = 151
xCell1 R_a 4 = 145
xCell1 R_a 5 = 152
xCell1 R_a 6 = 176
xCell1 R_a 7 = 204
xCell1 R_a 8 = 222
xCell1 R_a 9 = 254
xCell1 R_a 10 = 315
xCell1 R_a 11 = 437
xCell1 R_a 12 = 651
xCell1 R_a 13 = 1001
xCell1 R_a 14 = 1458
[R_a2x(Ra Table)]
xCell2 R_a flag = 0055
xCell2 R_a 0 = 36
xCell2 R_a 1 = 111
xCell2 R_a 2 = 188
xCell2 R_a 3 = 246
xCell2 R_a 4 = 256
xCell2 R_a 5 = 240
xCell2 R_a 6 = 274
xCell2 R_a 7 = 503
xCell2 R_a 8 = 601
xCell2 R_a 9 = 767
xCell2 R_a 10 = 938
xCell2 R_a 11 = 1060
xCell2 R_a 12 = 1154
xCell2 R_a 13 = 1776
xCell2 R_a 14 = 2587
[R_a3x(Ra Table)]
xCell3 R_a flag = FFFF
xCell3 R_a 0 = 160
xCell3 R_a 1 = 166
xCell3 R_a 2 = 153
xCell3 R_a 3 = 151
xCell3 R_a 4 = 145
xCell3 R_a 5 = 152
xCell3 R_a 6 = 176
xCell3 R_a 7 = 204
xCell3 R_a 8 = 222
xCell3 R_a 9 = 254
xCell3 R_a 10 = 315
xCell3 R_a 11 = 437
xCell3 R_a 12 = 651
xCell3 R_a 13 = 1001
xCell3 R_a 14 = 1458

[Device Status Data(PF Status)]
PF Flags 1 = 0000
PF Flags 2 = 0040

[Data(Calibration)]
CC Gain = 2.025
CC Delta = 2.025
Ref Voltage = 1227.75
AFE Pack Gain = 672.91
CC Offset = -0.254
Board Offset = -27.1
Int Temp Offset = 0.0
Ext1 Temp Offset = -1.2
Ext2 Temp Offset = 0.0
[Config(Calibration)]
CC Current = 3000
Voltage Signal = 16800
Temp Signal = 298.0
CC Offset Time = 250
ADC Offset Time = 32
CC Gain Time = 250
Voltage Time = 1984
Temperature Time = 32
Cal Mode Timeout = 300
[Temp Model(Calibration)]
Ext Coef 1 = -28285
Ext Coef 2 = 20848
Ext Coef 3 = -7537
Ext Coef 4 = 401.2
Ext Min AD = 0
Ext Max Temp = 401.2
Int Coef 1 = 0
Int Coef 2 = 0
Int Coef 3 = -11136
Int Coef 4 = 575.4
Int Min AD = 0
Int Max Temp = 575.4
[Current(Calibration)]
Filter = 239
Deadband = 3
CC Deadband = 10.0

Hi,

Just created new goldn gg/ROM files for bq20z70. bqEasy said creation was successful. However, there is a negative resistance value in one of the Ra Tables.

Cell1 R_a 14 = -1908

Is this normal? Can someone look at the gg file and tell me if everything looks OK?

Inserted gg after changing extension to .txt at the top of this message.

Thanks!

  • Hi Alexander,

    It isn't possible to have a negative resistance value in the Ra table. Something is possibly wrong in your setup. There is no gg file attached to this thread. Do reattach it.

    Regards

    Onyx

  • Hi Onyx,

    Thank you. That's what I thought. Link to gg (as txt) is at the top of original message.

    What went wrong or what did I do wrong? What would cause this? Do I have to start all over? Is there a way to fix this without starting over?

    Thanks,

    Alex

  • Hi Alex,

    Since this is an older device, there are a few reasons why this could have happened. There is the possibility that the chemid was incorrectly programmed, an incorrect qmax estimate was made or the learning cycle was not carried out following our standard procedure. Going by only the gg file, it is next to impossible to tell what the cause of the negative resistance value in the resistance table is. Do you have a log file and a senc file? What is the your chemid?

    Unfortunately, you will have to reload the default senc file and start the learning process again according to our procedure  to fix your issue. I have attached the default senc file for your reference.

    Thanks

    Onyx

     

    http://e2e.ti.com/cfs-file.ashx/__key/communityserver-discussions-components-files/180/4834.bq20z70_5F00_1_5F00_15.senc

     

     

  • Hi Onyx,

    Thank you for sending the bq20z70 default SENC. Came just in time--I'm about to restart.

    By what you said, tracing back my steps I think I didn't enable IT until the pack was fully charged (before the first discharge cycle). Would that have caused it?

    This posting utility is not allowing me to attach a SENC file. How can I do that? I had the same problem with the gg file until I changed its extension.

    Thank you,

    Alex

  • Hi Onyx,

    The SENC you sent is for a bq20z70 V1.15. We are using V1.60. Could you please send/post that version.

    Thanks,

    Alex

  • Hi Alexander,

    Yes, that could be a possible source of the error. Make sure to program the correct ChemID. The sequence of events for carrrying out a learning cycle are as follows: Set the Qmax and design capacity to what is shown in the data sheet, send SMB command 45 and word 0006 to turn on the FETs, discharge the pack down to termination voltae at C/5 rate, let the cells relax for 5 hours or more then send the IT enable command-0021. Check to make sure the QEN and VOK in operation Status are set. Charge the pack to full capacity until taper curent is reached and the FC bit is set then let the cells relax for 2 hours. This is the point Qmax is learned - you will see your Maxerror changing to 3% and update status to 5%. subsequently, discharge the cells to termination voltage at C/5 rate. The Maxerror changes to 1% and update status to 6%. For further details see document SLUA334B-preparing optimized default flash constants for specific battery types

    I dont know why your documents can't attach properly. I am able to do that with ease. Try zipping up your files and attach using the attach button.

    Find attached the V160 of the senc file.

     

    http://e2e.ti.com/cfs-file.ashx/__key/communityserver-discussions-components-files/180/3348.bq20z70_5F00_v160.senc

     

    regards

    Onyx