BQ27510-G3 Datasheet, PDF (18/30 Pages) Texas Instruments – System-Side Impedance Track Fuel Gauge With Direct Battery Connection

bq27510-G3
SLUSAT1A – MARCH 2013 – REVISED NOVEMBER 2015
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Typical Application (continued)
Table 5. Key Data Flash Parameters for Configuration
NAME
Design Capacity
DEFAULT
1000
Design Energy Scale
1
Reserve Capacity-mAh
0
Chem ID
0100
Load Mode
Load Select
Qmax Cell 0
Cell0 V at Chg Term
Terminate Voltage
Ra Max Delta
Charging Voltage
Taper Current
Taper Voltage
Dsg Current Threshold
Chg Current Threshold
Quit Current
Avg I Last Run
1
1
1000
4200
3200
44
4200
100
100
60
75
40
–299
Avg P Last Run
–1131
Sleep Current
10
CC Gain
10
CC Delta
10
Board Offset
0
UNIT
mAh
-
mAh
hex
-
-
mAh
mV
mV
mΩ
mV
mA
mV
mA
mA
mA
mA
mW
mA
mohms
mohms
Counts
RECOMMENDED SETTING
Set based on the nominal pack capacity as interpreted from cell manufacturer's
datasheet. If multiple parallel cells are used, should be set to N × Cell Capacity.
Set to 10 to convert all power values to cWh or to 1 for mWh. Design Energy
is divided by this value.
Set to desired runtime remaining (in seconds / 3600) × typical applied load
between reporting 0% SOC and reaching Terminate Voltage, if needed.
Should be configured using TI-supplied Battery Management Studio software.
Default open-circuit voltage and resistance tables are also updated in
conjunction with this step. Do not attempt to manually update reported Device
Chemistry as this does not change all chemistry information! Always update
chemistry using the appropriate software tool (that is, bqStudio).
Set to applicable load model, 0 for constant current or 1 for constant power.
Set to load profile which most closely matches typical system load.
Set to initial configured value for Design Capacity. The gauge will update this
parameter automatically after the optimization cycle and for every regular
Qmax update thereafter.
Set to nominal cell voltage for a fully charged cell. The gauge will update this
parameter automatically each time full charge termination is detected.
Set to empty point reference of battery based on system needs. Typical is
between 3000 and 3200 mV.
Set to 15% of Cell0 R_a 4 resistance after an optimization cycle is completed.
Set based on nominal charge voltage for the battery in normal conditions
(25°C, etc). Used as the reference point for offsetting by Taper Voltage for full
charge termination detection.
Set to the nominal taper current of the charger + taper current tolerance to
ensure that the gauge will reliably detect charge termination.
Sets the voltage window for qualifying full charge termination. Can be set
tighter to avoid or wider to ensure possibility of reporting 100% SOC in outer
JEITA temperature ranges that use derated charging voltage.
Sets threshold for gauge detecting battery discharge. Should be set lower than
minimal system load expected in the application and higher than Quit Current.
Sets the threshold for detecting battery charge. Can be set higher or lower
depending on typical trickle charge current used. Also should be set higher
than Quit Current.
Sets threshold for gauge detecting battery relaxation. Can be set higher or
lower depending on typical standby current and exhibited in the end system.
Current profile used in capacity simulations at onset of discharge or at all times
if Load Select = 0. Should be set to nominal system load. Is automatically
updated by the gauge every cycle.
Power profile used in capacity simulations at onset of discharge or at all times
if Load Select = 0. Should be set to nominal system power. Is automatically
updated by the gauge every cycle.
Sets the threshold at which the fuel gauge enters SLEEP mode. Take care in
setting above typical standby currents else entry to SLEEP may be
unintentionally blocked.
Calibrate this parameter using TI-supplied bqStudio software and calibration
procedure in the TRM. Determines conversion of coulomb counter measured
sense resistor voltage to current.
Calibrate this parameter using TI-supplied bqStudio software and calibration
procedure in the TRM. Determines conversion of coulomb counter measured
sense resistor voltage to passed charge.
Calibrate this parameter using TI-supplied bqStudio software and calibration
procedure in the TRM. Determines native offset of the printed circuit board
parasitics that should be removed from conversions.
18
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