Texas Instruments BQ41Z50EVM User Manual page 7

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4.1.3 Calibration Screen
The voltages, temperatures, and currents must be calibrated to provide good gauging performance.
Press the Calibration button to select the Advanced Calibration window. See
4.1.3.1 Voltage Calibration
• Measure the voltage from Cell 1 to 1N and enter this value in the Applied Cell 1 Voltage field and select the
Calibrate Voltage box.
• Measure the voltage from Bat+ to Bat– and enter this value in the Applied Battery Voltage field and select the
Calibrate Battery Voltage box.
• Measure the voltage from Pack+ to Pack– and enter this value in the Applied Pack Voltage field and select
the Calibrate Pack Voltage box. If the voltage is not present, then turn the charge and discharge FETs on by
entering a 0x0022 command in the Manufacturer Access register on the Register screen.
• Press the Calibrate Gas Gauge button to calibrate the voltage measurement system.
• Deselect the Calibrate Voltage boxes after voltage calibration has completed.
4.1.3.2 Temperature Calibration
• Enter the room temperature in each of the Applied Temperature fields and select the Calibrate box for each
thermistor to be calibrated. The temperature values must be entered in degrees Celsius.
• Press the Calibrate Gas Gauge button to calibrate the temperature measurement system.
• Deselect the Calibrate boxes after temperature calibration has completed.
SLUUD32 – JUNE 2024
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Figure 4-3. Calibration Screen
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Figure 4-3.
BQ41Z50 Li-Ion Battery Pack Manager Evaluation Module
Software
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