BQ34Z950: How to reduce charging current

Hello Bryan,

Thanks for reply I will reduce my fast charge current can you please help me regarding battery capacity, whenever I charge battery 100% then after relax time it is 96% can you please tell me what should i do for avoid this kindly help me.

Hi Shalini,

I would expect it to get stuck at 99% before 96%. By setting FC set% = -1 the full charge termination will be based upon the current taper of the cell. This should hopefully resolve the issue.

If not, please let me know and we can discuss next steps.

Sincerely,
Bryan Kahler

Hello Bryan Kahler

I Send you my parameter file can you please send me the parameter file for charge battery 100% which reduce charging  current and also my battery cycle count increase by 1 after completing charge discharge cycle. I hope You provide me solution as soon as possible.

[Voltage(1st Level Safety)]
COV Threshold = 4450
COV Recovery = 4200
CUV Threshold = 3010
CUV Recovery = 3060
[Current(1st Level Safety)]
OC (1st Tier) Chg = 6000
OC (1st Tier) Dsg = 6000
Current Recovery Time = 8
AFE OC Dsg = 12
AFE OC Dsg Time = 0F
AFE SC Chg Cfg = 77
AFE SC Dsg Cfg = 77
[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 = 18000
SOV Time = 0
Cell Imbalance Current = 5
Cell Imbalance Fail Voltage = 1000
Cell Imbalance Time = 0
Battery Rest Time = 1800
[Current(2nd Level Safety)]
SOC Chg = 10000
SOC Chg Time = 0
SOC Dsg = 10000
SOC Dsg Time = 0
[Temperature(2nd Level Safety)]
SOT Chg = 65.0
SOT Chg Time = 0
SOT Dsg = 75.0
SOT Dsg Time = 0
[FET Verification(2nd Level Safety)]
FET Fail Time = 0
[AFE Verification(2nd Level Safety)]
AFE Fail Limit = 10

[Charge Inhibit Cfg(Charge Control)]
Chg Inhibit Temp Low = 0.0
Chg Inhibit Temp High = 50.0
[Pre-Charge Cfg(Charge Control)]
Pre-chg Current = 250
Pre-chg Temp = 12.0
Pre-chg Voltage = 3000
Recovery Voltage = 3100
[Fast Charge Cfg(Charge Control)]
Fast Charge Current = 500
Charging Voltage = 16800
Suspend Low Temp = -5.0
Suspend High Temp = 55.0
[Termination Cfg.(Charge Control)]
Taper Current = 250
Taper Voltage = 300
TCA Clear % = 95
FC Set % = 100
FC Clear % = 98
[Cell Balancing Cfg(Charge Control)]
Min Cell Deviation = 1750
[Charging Faults(Charge Control)]
Over Charge Capacity = 300

[Data(SBS Configuration)]
Rem Cap Alarm = 300
Rem Energy Alarm = 4320
Rem Time Alarm = 10
Init Battery Mode = 0081
Design Voltage = 14400
Spec Info = 0031
Manuf Date = 23-Feb-2019
Ser. Num. = 0001
Cycle Count = 0
CC Threshold = 2295
CF MaxError Limit = 100
Design Capacity = 2550
Design Energy = 38000
Manuf Name = EMS_V165
Device Name = bq34z950
Device Chemistry = LION
[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

[Integrity Data(System Data)]
Reset Counter Partial = 0
Reset Counter Full = 202
[Manufacturer Info(System Data)]
Manuf. Info = 0123456789ABCDEF0123

[Registers(Configuration)]
Operation Cfg A = 0329
Operation Cfg B = 2448
Operation Cfg C = 0001
Permanent Fail Cfg = 0000
Non-Removable Cfg = 0000
[AFE(Configuration)]
AFE PMS Threshold = 5500

[LED Cfg(LED Support)]
LED Flash Period = 512
LED Blink Period = 1024
LED Delay = 100
LED Hold Time = 4
CHG Flash Alarm = 10
CHG Thresh 1 = 0
CHG Thresh 2 = 20
CHG Thresh 3 = 40
CHG Thresh 4 = 60
CHG Thresh 5 = 80
DSG Flash Alarm = 10
DSG Thresh 1 = 0
DSG Thresh 2 = 20
DSG Thresh 3 = 40
DSG Thresh 4 = 60
DSG Thresh 5 = 80
Sink Current = 3

[Power(Power)]
Flash Update OK Voltage = 7500
Shutdown Voltage = 12050
Charger Present = 3000
Wake Current Reg = 00

[IT Cfg(Gas Gauging)]
Load Select = 3
Load Mode = 0
Term Voltage = 12000
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 = 500
Quit Current = 10
[State(Gas Gauging)]
Qmax Cell 0 = 2569
Qmax Cell 1 = 2581
Qmax Cell 2 = 2582
Qmax Cell 3 = 2585
Qmax Pack = 2569
Update Status = 06
Delta Voltage = 4

[R_a0(Ra Table)]
Cell0 R_a flag = 0000
Cell0 R_a 0 = 41
Cell0 R_a 1 = 50
Cell0 R_a 2 = 73
Cell0 R_a 3 = 98
Cell0 R_a 4 = 99
Cell0 R_a 5 = 96
Cell0 R_a 6 = 101
Cell0 R_a 7 = 149
Cell0 R_a 8 = 181
Cell0 R_a 9 = 235
Cell0 R_a 10 = 310
Cell0 R_a 11 = 417
Cell0 R_a 12 = 447
Cell0 R_a 13 = 684
Cell0 R_a 14 = 994
[R_a1(Ra Table)]
Cell1 R_a flag = 0000
Cell1 R_a 0 = 51
Cell1 R_a 1 = 51
Cell1 R_a 2 = 75
Cell1 R_a 3 = 102
Cell1 R_a 4 = 102
Cell1 R_a 5 = 99
Cell1 R_a 6 = 103
Cell1 R_a 7 = 149
Cell1 R_a 8 = 188
Cell1 R_a 9 = 244
Cell1 R_a 10 = 320
Cell1 R_a 11 = 430
Cell1 R_a 12 = 468
Cell1 R_a 13 = 707
Cell1 R_a 14 = 1037
[R_a2(Ra Table)]
Cell2 R_a flag = 0055
Cell2 R_a 0 = 55
Cell2 R_a 1 = 55
Cell2 R_a 2 = 78
Cell2 R_a 3 = 101
Cell2 R_a 4 = 101
Cell2 R_a 5 = 97
Cell2 R_a 6 = 101
Cell2 R_a 7 = 148
Cell2 R_a 8 = 211
Cell2 R_a 9 = 278
Cell2 R_a 10 = 360
Cell2 R_a 11 = 497
Cell2 R_a 12 = 532
Cell2 R_a 13 = 62
Cell2 R_a 14 = 93
[R_a3(Ra Table)]
Cell3 R_a flag = 0000
Cell3 R_a 0 = 52
Cell3 R_a 1 = 56
Cell3 R_a 2 = 79
Cell3 R_a 3 = 102
Cell3 R_a 4 = 104
Cell3 R_a 5 = 102
Cell3 R_a 6 = 105
Cell3 R_a 7 = 156
Cell3 R_a 8 = 188
Cell3 R_a 9 = 241
Cell3 R_a 10 = 316
Cell3 R_a 11 = 429
Cell3 R_a 12 = 461
Cell3 R_a 13 = 439
Cell3 R_a 14 = 641
[R_a0x(Ra Table)]
xCell0 R_a flag = 0055
xCell0 R_a 0 = 41
xCell0 R_a 1 = 50
xCell0 R_a 2 = 73
xCell0 R_a 3 = 98
xCell0 R_a 4 = 99
xCell0 R_a 5 = 96
xCell0 R_a 6 = 101
xCell0 R_a 7 = 149
xCell0 R_a 8 = 215
xCell0 R_a 9 = 279
xCell0 R_a 10 = 368
xCell0 R_a 11 = 495
xCell0 R_a 12 = 531
xCell0 R_a 13 = 812
xCell0 R_a 14 = 1181
[R_a1x(Ra Table)]
xCell1 R_a flag = 0055
xCell1 R_a 0 = 51
xCell1 R_a 1 = 51
xCell1 R_a 2 = 75
xCell1 R_a 3 = 102
xCell1 R_a 4 = 102
xCell1 R_a 5 = 99
xCell1 R_a 6 = 103
xCell1 R_a 7 = 149
xCell1 R_a 8 = 215
xCell1 R_a 9 = 279
xCell1 R_a 10 = 366
xCell1 R_a 11 = 492
xCell1 R_a 12 = 535
xCell1 R_a 13 = 809
xCell1 R_a 14 = 1186
[R_a2x(Ra Table)]
xCell2 R_a flag = 0000
xCell2 R_a 0 = 55
xCell2 R_a 1 = 55
xCell2 R_a 2 = 78
xCell2 R_a 3 = 101
xCell2 R_a 4 = 101
xCell2 R_a 5 = 97
xCell2 R_a 6 = 101
xCell2 R_a 7 = 148
xCell2 R_a 8 = 186
xCell2 R_a 9 = 245
xCell2 R_a 10 = 317
xCell2 R_a 11 = 438
xCell2 R_a 12 = 469
xCell2 R_a 13 = 55
xCell2 R_a 14 = 82
[R_a3x(Ra Table)]
xCell3 R_a flag = 0055
xCell3 R_a 0 = 52
xCell3 R_a 1 = 56
xCell3 R_a 2 = 79
xCell3 R_a 3 = 102
xCell3 R_a 4 = 104
xCell3 R_a 5 = 102
xCell3 R_a 6 = 105
xCell3 R_a 7 = 156
xCell3 R_a 8 = 228
xCell3 R_a 9 = 292
xCell3 R_a 10 = 383
xCell3 R_a 11 = 520
xCell3 R_a 12 = 559
xCell3 R_a 13 = 532
xCell3 R_a 14 = 777

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

[Data(Calibration)]
CC Gain = 6.343
CC Delta = 6.343
Ref Voltage = 1222.95
AFE Pack Gain = 763.67
CC Offset = -0.257
Board Offset = -24.4
Int Temp Offset = 0.0
Ext1 Temp Offset = -3.5
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

[bq2050 Config(DQ Communication)]
bq20z753 Configuration = 10
Pins Pulled Down = 20
Pins Pulled Up = 05
Resistor Divider Gain = 6
mV to mAhr Scale = 640
AutoCal per Sleep = 0
BR_Low = 2700
BR_RC = 1000
Wr0_Low = 1775
Wr0_RC = 1225
Wr1_Low = 550
Wr1_RC = 2451
Rd0_Low = 1150
Rd1_Low = 1100
Rd_TO = 0
RD_RS = 300
Wr_0_to_1_Delay = 100
SlaveRsp_Delay = 3020

Hello Bryan Kahler,

Thanks for reply. I will try it again if not 100% charge then i will send u log file.

Hi Shalini,

Thank you for the update.

Sincerely,
Bryan Kahler