I've got a bq20z95 design that when the battery voltage goes below Depleted Voltage, the charge FET is disabled and does not recover. Details and settings below (less calibration).
The EV2300 shows the [CHG] is off. Temperature, current and voltage are within operational limits - no flags set. OCA, TCA, OTA, TDA are not set.
From the SBS, we get 0 voltage and 0 current requested, which would correspond to the CHG FET disabled. Got any thoughts?
[Header]
bq EVSW Version = 0.9.64
DeviceName = bq20z95 v1.50
Time = 6/16/2010 3:10:57 PM
[Voltage(1st Level Safety)]
COV Threshold = 4275
COV Time = 2
COV Recovery = 4150
COV Delta = 0
COV Temp. Hys = 0.0
POV Threshold = 12825
POV Time = 2
POV Recovery = 12450
CUV Threshold = 2750
CUV Time = 2
CUV Recovery = 2800
PUV Threshold = 8250
PUV Time = 1
PUV Recovery = 8400
[Current(1st Level Safety)]
OC (1st Tier) Chg = 5000
OC (1st Tier) Chg Time = 2
OC Chg Recovery = 200
OC (1st Tier) Dsg = 7000
OC (1st Tier) Dsg Time = 2
OC Dsg Recovery = 200
OC (2nd Tier) Chg = 6000
OC (2nd Tier) Chg Time = 1
OC (2nd Tier) Dsg = 8000
OC (2nd Tier) Dsg Time = 0
Current Recovery Time = 8
AFE OC Dsg = 00
AFE OC Dsg Time = 0C
AFE OC Dsg Recovery = 5
AFE SC Chg Cfg = 72
AFE SC Dsg Cfg = 72
AFE SC Recovery = 1
[Temperature(1st Level Safety)]
Over Temp Chg = 60.0
OT Chg Time = 2
OT Chg Recovery = 50.0
Over Temp Dsg = 75.0
OT Dsg Time = 2
OT Dsg Recovery = 65.0
[Host Comm(1st Level Safety)]
Host Watchdog Timeout = 0
[Voltage(2nd Level Safety)]
SOV Threshold = 13050
SOV Time = 2
Cell Imbalance Current = 5
Cell Imbalance Fail Voltage = 1000
Cell Imbalance Time = 0
Battery Rest Time = 0
Min CIM-check voltage = 3000
PFIN Detect Time = 5
[Current(2nd Level Safety)]
SOC Chg = 10000
SOC Chg Time = 0
SOC Dsg = 11000
SOC Dsg Time = 0
[Temperature(2nd Level Safety)]
SOT Chg = 75.0
SOT Chg Time = 5
SOT Dsg = 80.0
SOT Dsg Time = 5
Open Thermistor = -33.3
Open Time = 0
[FET Verification(2nd Level Safety)]
FET Fail Limit = 20
FET Fail Time = 5
[AFE Verification(2nd Level Safety)]
AFE Check Time = 0
AFE Fail Limit = 10
AFE Fail Recovery Time = 20
AFE Init Retry Limit = 6
AFE Init Limit = 20
[Fuse Verification(2nd Level Safety)]
Fuse Fail Limit = 2
Fuse Fail Time = 0
[Charge Inhibit Cfg(Charge Control)]
Chg Inhibit Temp Low = 0.0
Chg Inhibit Temp High = 50.0
Temp Hys = 1.0
[Pre-Charge Cfg(Charge Control)]
Pre-chg Current = 500
Pre-chg Temp = 4.0
Pre-chg Voltage = 1500
Recovery Voltage = 3000
[Fast Charge Cfg(Charge Control)]
Fast Charge Current = 4000
Charging Voltage = 12600
Delta Temp = 0.0
Suspend Low Temp = -5.0
Suspend High Temp = 60.0
[Pulse Charge Cfg(Charge Control)]
Turn ON Voltage = 5000
Turn OFF Voltage = 5000
Max ON Pulse Time = 60.00
Min OFF Pulse Time = 60.00
Max OFF Voltage = 5000
[Termination Cfg.(Charge Control)]
Maintenance Current = 0
Taper Current = 300
Taper Voltage = 200
Current Taper Window = 40
TCA Set % = -1
TCA Clear % = 95
FC Set % = -1
FC Clear % = 98
[Cell Balancing Cfg(Charge Control)]
Min Cell Deviation = 1750
[Charging Faults(Charge Control)]
Over Charging Voltage = 208
Over Charging Volt Time = 2
Over Charging Current = 500
Over Charging Curr Time = 2
Over Charging Curr Recov = 100
Depleted Voltage = 9000
Depleted Voltage Time = 2
Depleted Recovery = 8500
Over Charge Capacity = 780
Over Charge Recovery = 2
FC-MTO = 36000
PC-MTO = 7200
Charge Fault Cfg = 30
[Data(SBS Configuration)]
Rem Cap Alarm = 780
Rem Energy Alarm = 8660
Rem Time Alarm = 10
Init Battery Mode = 0081
Design Voltage = 11100
Spec Info = 0031
Manuf Date = 20-May-2010
Ser. Num. = 0001
Cycle Count = 0
CC Threshold = 7020
CC % = 90
CF MaxError Limit = 100
Design Capacity = 7800
Design Energy = 86580
Manuf Name =
Device Name =
Device Chemistry = LION
[Configuration(SBS Configuration)]
TDA Set % = -1
TDA Clear % = -1
FD Set % = 2
FD Clear % = 5
TDA Set Volt Threshold = 5000
TDA Set Volt Time = 0
TDA Clear Volt = 5500
FD Set Volt Threshold = 5000
FD Volt Time = 0
FD Clear Volt = 5500
[Manufacturer Data(System Data)]
Pack Lot Code = 0000
PCB Lot Code = 0000
Firmware Version = A41B
Hardware Revision = 0000
Cell Revision = 0000
[Manufacturer Info(System Data)]
Manuf. Info = SOLE20100426
[Lifetime Data(System Data)]
Lifetime Max Temp = 0.0
Lifetime Min Temp = 30.0
Lifetime Max Cell Voltage = 0
Lifetime Min Cell Voltage = 3200
Lifetime Max Pack Voltage = 0
Lifetime Min Pack Voltage = 9600
Lifetime Max Chg Current = 0
Lifetime Max Dsg Current = 0
Lifetime Max Chg Power = 0
Lifetime Max Dsg Power = 0
Life Max AvgDsg Cur = 0
Life Max AvgDsg Pow = 0
Lifetime Avg Temp = 0.0
[Lifetime Temp Samples(System Data)]
LT Temp Samples = 0
[Registers(Configuration)]
Operation Cfg A = 2A31
Operation Cfg B = 2C79
Operation Cfg C = 0001
Permanent Fail Cfg = 006F
Non-Removable Cfg = 0000
[LED Cfg(LED Support)]
LED Flash Rate = 2.000
LED Blink Rate = 1.000
LED Delay = 48.8
LED Hold Time = 4
CHG Flash Alarm = 10
CHG Thresh 1 = 0
CHG Thresh 2 = 25
CHG Thresh 3 = 50
CHG Thresh 4 = 75
CHG Thresh 5 = 100
DSG Flash Alarm = 10
DSG Thresh 1 = 0
DSG Thresh 2 = 25
DSG Thresh 3 = 50
DSG Thresh 4 = 75
DSG Thresh 5 = 100
Sink Current = 3
[Power(Power)]
Flash Update OK Voltage = 8000
Shutdown Voltage = 7500
Shutdown Time = 10
Cell Shutdown Voltage = 2500
Cell Shutdown Time = 10
Charger Present = 3000
Sleep Current = 10
Bus Low Time = 5
Cal Inhibit Temp Low = 5.0
Cal Inhibit Temp High = 45.0
Sleep Voltage Time = 5
Sleep Current Time = 20
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 = 100
Chg Current Threshold = 50
Quit Current = 10
Dsg Relax Time = 1
Chg Relax Time = 60
[State(Gas Gauging)]
Qmax Cell 0 = 8014
Qmax Cell 1 = 8054
Qmax Cell 2 = 8084
Qmax Cell 3 = 7800
Qmax Pack = 8014
Update Status = 02
Avg I Last Run = -1560
Avg P Last Run = -1750
Delta Voltage = 46
