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BQ34Z100-G1: Losses battery calibration when the battery unplug

Mahalakshmi SR
Prodigy 60 points
Part Number: BQ34Z100-G1

       Battery specification

         Custom LFP 18650 Battery: 12.8V 6000 mAh ( 77Wh, 2A rate ) with Molex Connector (batteryspace.com)

 

       

  1. Is there a better way to calibrate the battery? Currently if the battery gets unplugged it loses the calibration, it eventually learns the charging cycle but it takes a long time.
  2. Find the configuration below .

please confirm me the design capacity is correct or not?

The battery is 600mah and 77000Wh

design scale scale =10

design capacity = 6000/10 = 600

design energy = 77000 /10=    7700

Safety
OT_Chg 55
OT_Chg_Time 0
OT_Chg_Recovery 500
OT_Dsg 600
OT_Dsg_Time 2
OT_Dsg_Recovery 550
Charge_Inhibit_Cfg
Chg_Inhibit_Temp_Low 0
Chg_Inhibit_Temp_High 450
Temp_Hys 50
Charge
Suspend_Low_Temp
Suspend_High_Temp 550
Pb_EFF_Efficiency 100
Pb_Temp_Comp
Pb_Drop_Off_Percent 96
Pb_Reduction_Rate
Charge_Termination
Taper_Current 100
Min_Taper_Capacity 25
Cell_Taper_Voltage 100
Current_Taper_Window 40
TCA_Set_Percent 93
TCA_Clear_Percent 95
FC_Set_Percent 100
FC_Clear_Percent 98
DODatEOC_Delta_T 100
NiMH_Delta_Temp 30
NiMH_Delta_Temp_Time 180
NiMH_Hold_Off__Time 100
NiMH_Hold_Off_Current 240
NiMH_Hold_Off__Temp 250
NiMH_Cell_Negative_Delta_Volte 17
NiMH_Cell_Negative_Delta_Time 16
NiMH_Cell_Neg_Delta_Qual_Volt 4200
Configuration_Data
PAD
Manufacture_Date
Serial_Number 1
Cycle_Count 0
CC_Threshold 540
Max_Error_Limit 100
Design_Capacity 600
Design_Energy 7700
SOH_Load_I 64236
Cell_Charge_Voltage_T1_T2 3600
Cell_Charge_Voltage_T2_T3 4200
Cell_Charge_Voltage_T3_T4 3000
Charge_Current_T1_T2 100
Charge_Current__T2_T3 100
Charge_Current__T3_T4 30
JEITA_T1
JEITA_T2 10
JEITA_T3 45
JEITA_T4 55
Design_Energy_Scale 10
Device_Name
Manufacturer_Name
Device_Chemistry
Discharge
SOC1_Set_Threshold 150
SOC1_Clear_Threshold 175
SOCF_Set_Threshold 75
SOCF_Clear_Threshold 100
Cell_BL_Set_Volt_Threshold 2500
Cell_BL_Set_Volt_Time 2
Cell_BL_Clear_Volt_Threshold 2900
Cell_BH_Set_Volt_Threshold 4300
Cell_BH_Volt_Time 2
Cell_BH__Clear_Volt_Threshold 4200
pAD
Cycle_Delta 5
Lifetime_Data
Lifetime_Max_Temp 300
Lifetime_Min_Temp 200
Lifetime_Max_Chg_Current
Lifetime_Max_Dsg_Current
Lifetime_Max_Pack_Voltage 320
Lifetime_Min_Pack_Voltage 350
Registers
Pack_Configuration
Pack_Configuration_B
Pack_Configuration_C
LED_Comm_Configuration
Alert_Configuration
Number_of_series_cell
Power
Flash_Update_OK_Cell_Volt 1750
Sleep_Current 10
PADDING
FS_Wait
It_Cfg
Load_Select
Load_Mode
PAD
Res_Current 10
PAD
Max_Res_Factor 50
Min_Res_Factor 1
PAD
Ra_Filter
PAD
Min_PassedChg_NiMH_LA_1st_Qmax 50
PAD
Maximum_Qmax_Change 100
PAD
Cell_Terminate_Voltage 1000
Cell_Term_V_Delta 200
PAD
ResRelax_Time 500
PAD
User_Rate_mA 1339
User_Rate_Pwr
Reserve_Cap_mAh
Reserve_Energy
PAD
Max_Scale_Back_Grid 4
Cell_Min_DeltaV
Ra_Max_Delta 15
Design_Resistance 42
Reference_Grid 4
Qmax_Max_Delta_Percent 5
Max_Res_Scale 32000
Min_Res_Scale 1
Fast_Scale_Start_SOC 10
PAD
Charge_Hys_V_Shift 40
Smooth_Relax_Time 1000
Current_Thresholds
Dsg_Current_Threshold 60
Chg_Current_Threshold 75
Quit_Current 40
Dsg_Relax_Time 60
Chg_Relax_Time 60
Cell_Max_IR_Correct
Gas_Gauging_State
Qmax_Cell_ 6000
Cycle_Count
Update_Status
Cell_V_at_Chg_Term 3800
Avg_I_Last_Run 65237
Avg_P_Last_Run 64405
Cell_Delta_Voltage 2
T_Rise
T_Time_Constant
Calibration_Data
CC_Gain 10
CC_Delta 10
CC_Offset
Board_Offset
Int_Temp_Offset
Ext_Temp_Offset
PAD
Voltage_Divider 16133
Current
Deadband 5
  • 0
    TI__Genius 13850 points

    Hi,

    1) When you unplug and plug back in your battery, the gauge will use DODEOC to calculate SOC. DODEOC is calculated using Taper current, Temperature, and Cell V at Chg Term, if any of these changed while the battery is unplugged there will be a change in reported SOC. Also, your battery is probably not relaxed when you disconnect and reconnect the battery this could cause SOC error. After the battery is charged to full or discharged to empty the gauge will be able to accurately track SOC.

    2) The scaling looks good.

    Regards,

    Evan

  • 0 in reply to Diego
    Prodigy 60 points

    Hi Even,

    Thank you for the response

    Double confirmation on the design capacity calculation.

    The battery is 6000mah and 77000mWh

    design scale scale =10

    design capacity = 6000/10 = 600

    design energy = 77000 /10=    7700

  • 0 in reply to Mahalakshmi SR
    TI__Genius 13850 points

    Hi,

    Yes, both are scaled correctly.

    1 thing to note though is that when scaling energy it effects the below parameters, all will need to be scaled.

    Design capacity is scaled by current scale factor, design capacity along with all parameters reported in mAh and mA will need to be scaled.

    Regards,

    Evan