Texas Instruments bq34z100EVM, User Manual, Page: 10 / 28

3.3.3 Current Calibration
• Select the Calibrate CC Offset and Calibrate Board Offset boxes and insure that there is no current flow.
• Press the Calibrate Gas Gauge button to calibrate.
• Deselect the Calibrate CC Offset and Calibrate Board Offset boxes after current calibration has completed.
• Connect and measure a 2-A load from BAT+ and PACK– to calibrate the current gain.
• Enter –2000 in the Applied Current field and select the Calibrate Current box.
• Press the
Calibrate Gas Gauge button to calibrate.
• Deselect the Calibrate Current box after current calibration has completed.
3.4 Chemistry Screen
The chemistry file contains parameters that the simulations use to model the cell and its operating profile. It
is critical to program a Chemistry ID that matches the cell into the device. Some of these parameters can be
viewed in the Data Flash section of the Battery Management Studio.
Press the Chemistry button to select the Chemistry window. See Figure 3-4 .
Figure 3-4. Chemistry Screen
• The table can be sorted by clicking the desired column. For example: Click the Chemistry ID column header.
• Select the ChemID that matches your cell from the table (
Figure 3-4 ).
• Press the Update chemistry in the data flash button to update the chemistry in the device.
Battery Management Studio www.ti.com
10 bq34z100EVM Wide Range Impedance Track™ Enabled Battery Fuel Gauge
Solution SLUU904B – APRIL 2012 – REVISED APRIL 2021
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