BQ33100EVM-001: BQ33100 Learning prcoess

Hey Ab,

Today's a federal holiday so no one is in the office. We will get back to you tomorrow.

Regards,
Nick Richards

Hi,

Sorry for the delay.

What is V learn max set to?

Can you share your .gg file?

Regards,

Evan

Hi Evan,

Thank you for your reply.

My current V learn max is 12400.

Hi Evan,

Sorry, I didn't see earlier that you asked for  .gg file.

I'm using the BQ33100EVM but don't have the EV2400. I think it connects with a desktop app to create the .gg file. 

Please tell me which commands you need me to run. This way, I can give you all the details about this problem and you can help me with the trouble shooting.

Thank you,

Hi,

This will be difficult to debug without this file.

Why does the Temperature read 2706C? Are you using an internal or external thermistor?

Have you configured V CHG MAX, V CHG Nominal, V CHG A, and V CHG B properly?

Regards,

Evan

I'm using the internal sensor and now the temperature is  = 23.150000 C after fixing the conversion issue.

V_CHG_NOMINAL (10500)
V_CHG_A (11125) 
V_CHG_B (11875)
V_CHG_MAX (13500)
V_LEARN_MAX (12400) 

Let me know if I am using wrong values.

Thank you,

Hi,

Did you see any improvement after fixing the temperature reading?

Was V_CHG_MAX specified by the battery manufacture? It is usually equal to V_LEARNED_MAX.

Regards,

Evan

My whole setup includes 5 capacitors each with 2.7V and 5F capacitance giving a total capacitance of 1F and a total voltage of 13.5V. but the BQ33100EVM can only output specific voltages as shown below, so I am using 10.5V as my system voltage and 12.4V as my V_LEARNED_MAX andV_CHG_MAX. Unless I am missing something. I can't charge all the capacitors to 2.7V each for a total of 13.5V for learning.

Caps datasheet: https://www.mouser.ca/datasheet/2/257/XP_2_7_5F_ds_3001975_datasheet-2322201.pdf

BCAP0005 P270 X01

Thank you,

V_CHG_NOMINAL (10500)
V_CHG_A (11125) 
V_CHG_B (11875)
V_CHG_MAX (12400)
V_LEARN_MAX (12400) 

I tried with the above values and I am still getting the same value of 62296F back.

Hi,

I am unsure where the chart you are sending is coming from.

I recommend proceeding with the second set of value.

Can you ensure that FC Set % = -1 and that the FC flag sets (proper charge termination has occurred), which is required for capacitance learning.

Regards,

Evan

Hi Evan,

My apologies for the delay,

Yes, FC Set and  FC Clear are set to -1.



Thank you,

Hi, 

I am referring to the FC flag in the OperationStatus Register. Is the FC flag set?

Is it possible for you to share a schematic of your set up?

Regards,

Evan

as shown below the FC flag is set to 1 in the operation status.

and I am using the following dev kit from TI for testing.

https://www.ti.com/tool/BQ33100EVM-001?keyMatch=&tisearch=search-everything&usecase=hardware

I have an external stm32 connected via I2C/SMBus to the dev kit above with 5 supercaps of 5F in series.



Thank you,


 

Hi,

Thats great I was hoping you were using an EVM! Can you share your .srec file currently on the gauge with the inaccurate capacitance and ESR.

Regards,

Evan 

Hi Evan,

Thank you for your response.

Do I need to wait for the EV2400 to arrive or can I get this file directly from the EVM?

Regards,

Hi,

Sorry miscommunication with Cameron, I thought the EV2400 had already been delivered.

Yes, you will need the EV2400 + EVSW to be able to pull the .srec file. one thing to note is that this device uses EVSW and not BQstudio.

Regards,

Evan

Hi Evan,

I received the EV2400 board. I am trying to save the .srec file but the BQEVSW keep outputting that device not in ROM?




Thank you,

Hey Ab,

Evan is currently out of office. He will return on Tuesday March 5th

Regards,
Nick Richards

Hi,

Did you install the EVSW on the BQ33100 product folder?

SLUC249 Support software | TI.com

Did you follow all steps in the BQ33100 users guide?

5.2/6 - bq33100 Super Capacitor Pack Manager EVM (ti.com)

Regards,

Evan

Hi Evan,

Thank you for your response.

I have installed the .exe file for BQEVSW and I'm able to read and write to the data flash, send commands and calibrate the DEV board.



.gg file

[Header]
bq EVSW Version = 0.9.92	
DeviceName = bq33100 v0.09
Time = 3/5/2024 3:18:49 PM	


[Voltage(Safety)]
OV Threshold = 100
OV Recovery = 0
OV Time = 2
CIM Fail Voltage = 550
CIM Time = 10
CIM Recovery = 500
Min CIM Check Voltage = 1000
[Current(Safety)]
OC Chg = 1000
OC Chg Time = 5
OC Chg Recovery = 900
CLBAD Current = 15
CLBAD Time = 60
CLBAD Recovery = 10
Current Recovery Time = 5
OC Dsg = 0F
OC Dsg Time = 0F
OC Dsg Recovery = 5
SC Chg Cfg = F4
SC Dsg Cfg = F7
SC Recovery = 1
[Temperature(Safety)]
OT Chg = 68.0
OT Chg Time = 2
OT Chg Recovery = 63.0
[AFE Verification(Safety)]
AFE Fail Limit = 100
AFE Init Retry Limit = 6
AFE Init Limit = 20

[Charge Cfg(Charge Control)]
Chg Voltage = 10500
Chg Current = 500
Chg Enable Delay = 0
[Full Charge Cfg(Charge Control)]
Taper Current = 3
Taper Voltage = 100
Current Taper Window = 2
FC Set % = -1
FC Clear % = 98
[Capacitance Balancing Cfg(Charge Control)]
CB Threshold = 1500
CB Min = 5
CB Restart = 10

[Data(System Data)]
Design Voltage = 10500
Manuf Date = 01-Jan-2023
Ser. Num. = 0001
Design Capacitance = 1.00
Init 1st Capacitance = 1.00
Capacitance = -32.43
Design ESR = 220
Initial ESR = 220
ESR = 26239
Manuf Name = Texas Inst.
Device Name = bq33100
Init Safety Status = 0000
[Manufacturer Data(System Data)]
Pack Lot Code = 0000
PCB Lot Code = 0000
Firmware Version = 0000
Hardware Revision = 0000
[Manufacturer Info(System Data)]
Manuf. Info = 0123456789ABCDEF0123456789ABCDE
[Lifetime Data(System Data)]
Lifetime Max Temp = 35.2
Lifetime Min Temp = 18.0
Lifetime Max Capacitor Voltage = 2700

[Registers(Configuration)]
Operation Cfg = 0400
FET Action = 0000
Fault = 0000
[AFE(Configuration)]
AFE State_CTL = 00
[Power(Configuration)]
Flash Update OK Voltage = 4000
Shutdown Voltage = 4000

[System Requirement(Monitoring)]
Min Power = 10
Required Time = 60
Min Voltage = 4000
[Charging Voltage(Monitoring)]
V Chg Nominal = 10500
V Chg A = 10800
V Chg B = 11100
V Chg Max = 12400
V Learn Max = 12400
[Learning Configuration(Monitoring)]
Learning Frequency = 2
Measurement Margin % = 1
Max Chg Time = 300
Max Dsg Time = 300
Learn Delta Voltage = 500
Cap Start Time = 320
[Current Thresholds(Monitoring)]
Dsg Current Threshold = 10
Chg Current Threshold = 0

[Data(Calibration)]
Current Gain = 0.885
CC Delta = 0.885
Cap1 K-factor = 5485
Cap2 K-factor = 18076
Cap3 K-factor = 19640
Cap4 K-factor = 26065
Cap5 K-factor = 20087
K-factor override flag = 9669
System Voltage K-factor = 24440
Stack Voltage K-factor = 24612
CC Offset = -1.14
Board Offset = 0
Int Temp Offset = 0.0
Ext1 Temp Offset = 1.9
Ext2 Temp Offset = 0.0
ESR Offset = 0
[Config(Calibration)]
CC Current = 3000
Voltage Signal = 10500
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 a1 = -14812
Ext Coef a2 = 24729
Ext Coef a3 = -21265
Ext Coef a4 = 28353
Ext Coef a5 = 759
Ext Coef b1 = -399
Ext Coef b2 = 764
Ext Coef b3 = -3535
Ext Coef b4 = 5059
Ext rc0 = 11703
Ext adc0 = 11813
Rpad = 87
Rint = 17740
Int Coef 1 = 0
Int Coef 2 = 0
Int Coef 3 = -12263
Int Coef 4 = 6106
Int Min AD = 0
Int Max Temp = 610.6
[Current(Calibration)]
Filter = 239
Dead Band = 5
CC Deadband = 2.9

Hi,

My team and I are currently looking into this are trying to recreate the issue, please allow us some time.

Regards,

Evan

Hi Evan,

Any update on this? do you need anything from my side to help with this?

Thank you,

Hi,

I am struggling to recreate the error the capacitance and ESR error you are getting. Thank you for sending the .gg file, I have been using this since the .srec in unavailable. There is no update at the moment. 

Regards,

Evan