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BQ27742-G1: life time data abnormal

yichong wu
Prodigy 30 points
Part Number: BQ27742-G1

 

our battery use BQ27742-G1, ship to customer side(shutdown mode) and never used, after we active the gauge and read the data memory we found the lifetime max pack voltage update to 4495mV while the OVP setting is 4250mV,  we've double check the OVP still work normally so we wonder know how the fuel gauge can change the data.

  • 0
    TI__Genius 13736 points

    Hello, 

    Could you please provide me with the full gg file for this? 

    Regards, 

    Jonny. 

  • 0 in reply to Robert
    Prodigy 30 points

    Hi  Jonny：

           I can't upload the file so I paste all the data as below for your reference .

    * Texas Instruments Data Flash File
    * File created Mon Dec 25 14:17:46 2023
    *
    * Device Number 742
    * Firmware Version 1.03
    * Build Number not available
    * Order Number not available
    *
    * bqz Device Number 0x0742
    * bqz Firmware Version 0x0103
    * bqz Build Number 00
    *
    * Field Order: Class name  Subclass name  Parameter name  Parameter Value  Display Units
    Configuration Safety OV Prot Threshold 4250 mV
    Configuration Safety OV Prot Delay 1 s
    Configuration Safety OV Prot Recovery 4150 mV
    Configuration Safety UV Prot Threshold 2800 mV
    Configuration Safety UV Prot Delay 1 s
    Configuration Safety UV Prot Recovery 3000 mV
    Configuration Safety Body Diode Threshold 60 mA
    Configuration Safety OT Chg 50 掳C
    Configuration Safety OT Chg Time 5 s
    Configuration Safety OT Chg Recovery 45 掳C
    Configuration Safety OT Dsg 65 掳C
    Configuration Safety OT Dsg Time 5 s
    Configuration Safety OT Dsg Recovery 50 掳C
    Configuration Charge Charging Voltage 4200 mV
    Configuration Charge Termination Taper Current 70 mA
    Configuration Charge Termination Min Taper Capacity 10 mAh
    Configuration Charge Termination Taper Voltage 100 mV
    Configuration Charge Termination Current Taper Window 40 s
    Configuration Charge Termination TCA Set % -1 %
    Configuration Charge Termination TCA Clear % 98 %
    Configuration Charge Termination FC Set % -1 %
    Configuration Charge Termination FC Clear % 98 %
    Configuration Charge Termination DODatEOC Delta T 5 掳C
    Configuration JEITA T1 Temp 0 掳C
    Configuration JEITA T2 Temp 10 掳C
    Configuration JEITA T3 Temp 22 掳C
    Configuration JEITA T4 Temp 45 掳C
    Configuration JEITA T5 Temp 45 掳C
    Configuration JEITA Temp Hys 1 掳C
    Configuration JEITA T1-T2 Chg Voltage 4200 mV
    Configuration JEITA T2-T3 Chg Voltage 4200 mV
    Configuration JEITA T3-T4 Chg Voltage 4200 mV
    Configuration JEITA T4-T5 Chg Voltage 4200 mV
    Configuration JEITA T1-T2 Chg Current 40 %
    Configuration JEITA T2-T3 Chg Current 80 %
    Configuration JEITA T3-T4 Chg Current 100 %
    Configuration JEITA T4-T5 Chg Current 100 %
    Configuration Data Design Voltage 3700 mV
    Configuration Data Cycle Count 0 Num
    Configuration Data CC Threshold 600 mAh
    Configuration Data Design Capacity 620 mAh
    Configuration Data Design Energy 2294 mWh
    Configuration Data SOH Load I -400 mA
    Configuration Data TDD SOH Percent 80 %
    Configuration Data ISD Current 10 Hr rate
    Configuration Data ISD I Filter 127 Num
    Configuration Data Min ISD Time 7 Hours
    Configuration Data Design Energy Scale 1 Num
    Configuration Discharge SOC1 Set Threshold 60 mAh
    Configuration Discharge SOC1 Clear Threshold 177 mAh
    Configuration Discharge SOCF Set Threshold 23 mAh
    Configuration Discharge SOCF Clear Threshold 59 mAh
    Configuration Discharge BL Set Volt Threshold 2900 mV
    Configuration Discharge BL Set Volt Time 2 s
    Configuration Discharge BL Clear Volt Threshold 3000 mV
    Configuration Discharge BH Set Volt Threshold 4300 mV
    Configuration Discharge BH Volt Time 2 s
    Configuration Discharge BH Clear Volt Threshold 4200 mV
    Configuration Manufacturer Data Pack Lot Code 0 Hex
    Configuration Manufacturer Data PCB Lot Code 0 Hex
    Configuration Manufacturer Data Firmware Version 0 Hex
    Configuration Manufacturer Data Hardware Revision 0 Hex
    Configuration Manufacturer Data Cell Revision 0 Hex
    Configuration Manufacturer Data DF Config Version 0 Hex
    Configuration Integrity Data All DF Checksum 0 Hex
    Configuration Integrity Data Static Chem DF Checksum 7473 Hex
    Configuration Integrity Data Static DF Checksum 0 Hex
    Configuration Integrity Data Prot Checksum 3 Hex
    Configuration Lifetime Data Lifetime Max Temp 24.5 掳C
    Configuration Lifetime Data Lifetime Min Temp 20.1 掳C
    Configuration Lifetime Data Lifetime Max Pack Voltage 4495 mV
    Configuration Lifetime Data Lifetime Min Pack Voltage 3293 mV
    Configuration Lifetime Data Lifetime Max Chg Current 0 mA
    Configuration Lifetime Data Lifetime Max Dsg Current 0 mA
    Configuration Lifetime Temp Samples LT Flash Cnt 128 Num
    Configuration Lifetime Temp Samples LT AFE Status 0 Hex
    Configuration Registers Pack Configuration 097f Flag
    Configuration Registers Pack Configuration B 80 Flag
    Configuration Registers Pack Configuration C 18 Flag
    Configuration Registers Pack Configuration D 80 Flag
    Configuration Registers Prot OC Config 0 Flag
    Configuration Registers Prot OV Config 3 Flag
    Configuration Lifetime Resolution LT Temp Res 1 掳C
    Configuration Lifetime Resolution LT V Res 25 mV
    Configuration Lifetime Resolution LT Cur Res 100 mA
    Configuration Lifetime Resolution LT Update Time 60 s
    Configuration Power Flash Update OK Voltage 2800 mV
    Configuration Power Sleep Current 1 mA
    Configuration Power Shutdown V 2700 mV
    Configuration Power FS Wait 0 s
    System Data Manufacturer Info Block A 0 0 Hex
    System Data Manufacturer Info Block A 1 54 Hex
    System Data Manufacturer Info Block A 2 43 Hex
    System Data Manufacturer Info Block A 3 42 Hex
    System Data Manufacturer Info Block A 4 32 Hex
    System Data Manufacturer Info Block A 5 46 Hex
    System Data Manufacturer Info Block A 6 41 Hex
    System Data Manufacturer Info Block A 7 30 Hex
    System Data Manufacturer Info Block A 8 30 Hex
    System Data Manufacturer Info Block A 9 34 Hex
    System Data Manufacturer Info Block A 10 31 Hex
    System Data Manufacturer Info Block A 11 34 Hex
    System Data Manufacturer Info Block A 12 32 Hex
    System Data Manufacturer Info Block A 13 33 Hex
    System Data Manufacturer Info Block A 14 30 Hex
    System Data Manufacturer Info Block A 15 2d Hex
    System Data Manufacturer Info Block A 16 30 Hex
    System Data Manufacturer Info Block A 17 36 Hex
    System Data Manufacturer Info Block A 18 33 Hex
    System Data Manufacturer Info Block A 19 30 Hex
    System Data Manufacturer Info Block A 20 30 Hex
    System Data Manufacturer Info Block A 21 0 Hex
    System Data Manufacturer Info Block A 22 0 Hex
    System Data Manufacturer Info Block A 23 0 Hex
    System Data Manufacturer Info Block A 24 0 Hex
    System Data Manufacturer Info Block A 25 0 Hex
    System Data Manufacturer Info Block A 26 0 Hex
    System Data Manufacturer Info Block A 27 0 Hex
    System Data Manufacturer Info Block A 28 0 Hex
    System Data Manufacturer Info Block A 29 0 Hex
    System Data Manufacturer Info Block A 30 0 Hex
    System Data Manufacturer Info Block A 31 0 Hex
    System Data Manufacturer Info Block B 0 0 Hex
    System Data Manufacturer Info Block B 1 0 Hex
    System Data Manufacturer Info Block B 2 0 Hex
    System Data Manufacturer Info Block B 3 0 Hex
    System Data Manufacturer Info Block B 4 0 Hex
    System Data Manufacturer Info Block B 5 0 Hex
    System Data Manufacturer Info Block B 6 0 Hex
    System Data Manufacturer Info Block B 7 0 Hex
    System Data Manufacturer Info Block B 8 0 Hex
    System Data Manufacturer Info Block B 9 0 Hex
    System Data Manufacturer Info Block B 10 0 Hex
    System Data Manufacturer Info Block B 11 0 Hex
    System Data Manufacturer Info Block B 12 0 Hex
    System Data Manufacturer Info Block B 13 0 Hex
    System Data Manufacturer Info Block B 14 0 Hex
    System Data Manufacturer Info Block B 15 0 Hex
    System Data Manufacturer Info Block B 16 0 Hex
    System Data Manufacturer Info Block B 17 0 Hex
    System Data Manufacturer Info Block B 18 0 Hex
    System Data Manufacturer Info Block B 19 0 Hex
    System Data Manufacturer Info Block B 20 0 Hex
    System Data Manufacturer Info Block B 21 0 Hex
    System Data Manufacturer Info Block B 22 0 Hex
    System Data Manufacturer Info Block B 23 0 Hex
    System Data Manufacturer Info Block B 24 0 Hex
    System Data Manufacturer Info Block B 25 0 Hex
    System Data Manufacturer Info Block B 26 0 Hex
    System Data Manufacturer Info Block B 27 0 Hex
    System Data Manufacturer Info Block B 28 0 Hex
    System Data Manufacturer Info Block B 29 0 Hex
    System Data Manufacturer Info Block B 30 0 Hex
    System Data Manufacturer Info Block B 31 0 Hex
    Gas Gauging IT Cfg Load Select 1 Num
    Gas Gauging IT Cfg Load Mode 1 Num
    Gas Gauging IT Cfg Max Res Factor 15 Num
    Gas Gauging IT Cfg Min Res Factor 5 Num
    Gas Gauging IT Cfg Ra Filter 800 Num
    Gas Gauging IT Cfg Res V Drop 50 mV
    Gas Gauging IT Cfg Fast Qmax Start DOD % 92 %
    Gas Gauging IT Cfg Fast Qmax End DOD % 96 %
    Gas Gauging IT Cfg Fast Qmax Start Volt Delta 200 mV
    Gas Gauging IT Cfg Fast Qmax Current Threshold 4 Hr rate
    Gas Gauging IT Cfg Qmax Capacity Err 1.5 %
    Gas Gauging IT Cfg Max Qmax Change 30 %
    Gas Gauging IT Cfg Terminate Voltage 3000 mV
    Gas Gauging IT Cfg Term V Delta 200 mV
    Gas Gauging IT Cfg ResRelax Time 500 s
    Gas Gauging IT Cfg User Rate-mA 0 mA
    Gas Gauging IT Cfg User Rate-Pwr 0 pwr
    Gas Gauging IT Cfg Reserve Cap-mAh 0 mAh
    Gas Gauging IT Cfg Max DeltaV 200 mV
    Gas Gauging IT Cfg Min DeltaV 0 mV
    Gas Gauging IT Cfg Max Sim Rate 1 Hr rate
    Gas Gauging IT Cfg Min Sim Rate 20 Hr rate
    Gas Gauging IT Cfg Ra Max Delta 54 mOhm
    Gas Gauging IT Cfg Trace Resistance 0 mOhm
    Gas Gauging IT Cfg Downstream Resistance 0 mOhm
    Gas Gauging IT Cfg Qmax Max Delta % 5 %
    Gas Gauging IT Cfg Qmax Bound % 130 %
    Gas Gauging IT Cfg DeltaV Max Delta 10 mV
    Gas Gauging IT Cfg Max Res Scale 5000 Num
    Gas Gauging IT Cfg Min Res Scale 200 Num
    Gas Gauging IT Cfg Fast Scale Start SOC 10 %
    Gas Gauging IT Cfg Fast Scale Load Select 3 Num
    Gas Gauging IT Cfg Charge Hys V Shift 40 mV
    Gas Gauging IT Cfg RaScl OCV Rst Temp Thresh 15 掳C
    Gas Gauging IT Cfg Max Allowed Current 8500 mA
    Gas Gauging IT Cfg Max Current Pulse Duration 10 s
    Gas Gauging IT Cfg Max Current Interrupt Step 500 mA
    Gas Gauging Current Thresholds Dsg Current Threshold 10 mA
    Gas Gauging Current Thresholds Chg Current Threshold 10 mA
    Gas Gauging Current Thresholds Quit Current 5 mA
    Gas Gauging Current Thresholds Dsg Relax Time 60 s
    Gas Gauging Current Thresholds Chg Relax Time 60 s
    Gas Gauging Current Thresholds Quit Relax Time 1 s
    Gas Gauging Current Thresholds Max IR Correct 400 mV
    Gas Gauging State Qmax Cell 0 716 mAh
    Gas Gauging State Update Status 4 Hex
    Gas Gauging State V at Chg Term 4220 mV
    Gas Gauging State Avg I Last Run -124 mA
    Gas Gauging State Avg P Last Run -459 pwr
    Gas Gauging State Delta Voltage 2 mV
    Gas Gauging State T Rise 50 Num
    Gas Gauging State T Time Constant 1000 Num
    OCV Table OCVa Table Chem ID 341 -
    Ra Table R_a0 R_a0 Flag 55 Hex
    Ra Table R_a0 R_a0 0 272 Num
    Ra Table R_a0 R_a0 1 323 Num
    Ra Table R_a0 R_a0 2 332 Num
    Ra Table R_a0 R_a0 3 376 Num
    Ra Table R_a0 R_a0 4 421 Num
    Ra Table R_a0 R_a0 5 283 Num
    Ra Table R_a0 R_a0 6 308 Num
    Ra Table R_a0 R_a0 7 313 Num
    Ra Table R_a0 R_a0 8 301 Num
    Ra Table R_a0 R_a0 9 326 Num
    Ra Table R_a0 R_a0 10 477 Num
    Ra Table R_a0 R_a0 11 575 Num
    Ra Table R_a0 R_a0 12 659 Num
    Ra Table R_a0 R_a0 13 1701 Num
    Ra Table R_a0 R_a0 14 22949 Num
    Ra Table R_a0x R_a0x Flag 0 Hex
    Ra Table R_a0x R_a0x 0 272 Num
    Ra Table R_a0x R_a0x 1 323 Num
    Ra Table R_a0x R_a0x 2 332 Num
    Ra Table R_a0x R_a0x 3 376 Num
    Ra Table R_a0x R_a0x 4 421 Num
    Ra Table R_a0x R_a0x 5 283 Num
    Ra Table R_a0x R_a0x 6 308 Num
    Ra Table R_a0x R_a0x 7 313 Num
    Ra Table R_a0x R_a0x 8 301 Num
    Ra Table R_a0x R_a0x 9 326 Num
    Ra Table R_a0x R_a0x 10 477 Num
    Ra Table R_a0x R_a0x 11 575 Num
    Ra Table R_a0x R_a0x 12 659 Num
    Ra Table R_a0x R_a0x 13 1701 Num
    Ra Table R_a0x R_a0x 14 22949 Num
    Calibration Data CC Gain 6.051 mOhm
    Calibration Data CC Delta 6.039 mOhm
    Calibration Data CC Offset 1395 Counts
    Calibration Data Board Offset -16 Counts
    Calibration Data Int Temp Offset 2.2 掳C
    Calibration Data Ext Temp Offset 0 掳C
    Calibration Data Pack V Offset -10 mV
    Calibration Current Filter 239 Num
    Calibration Current Deadband 5 mA
    Calibration Current CC Deadband 34 Counts
    Security Codes Sealed to Unsealed 0 Hex
    Security Codes Unsealed to Full 0 Hex
    Security Codes Authen Key3 0 Hex
    Security Codes Authen Key2 0 Hex
    Security Codes Authen Key1 0 Hex
    Security Codes Authen Key0 0 Hex
  • 0 in reply to yichong wu
    TI__Genius 13736 points

    Hello, 

    This behavior is not abnormal for the gauge. What it seems like is happening is that there was a transient to bring this voltage up to the 4495 mV, but the OVP was not triggered because this voltage was present less than the OVP delay. 

    Regards, 

    Jonny. 

  • 0 in reply to Robert
    Prodigy 30 points

    Hi Jonny:

             LT update time is 60s so that I think while lifetime data have updated, the delay time should be much more than the OVP delay time

  • 0 in reply to yichong wu
    TI__Genius 13736 points

    Hello, 

    The LT update time is not the same as the protection delay time. The OVP delay time is the amount of time the condition has to be present for the protection to trip. The LT update time is the minimum update time between DF writes. Please see the image below taken from the BQ27742 TRM for more on the LT update time. 

    Regards, 

    Jonny.