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BQ34Z100-G1: Using direct display control of LEDs

CURTIS NEELY
Prodigy 10 points
Part Number: BQ34Z100-G1
Other Parts Discussed in Thread: GPCCHEM

Our unit contains two sealed lead acid 12-VDC, 0.8AH batteries (PS-1208WL) connected in series.  Can the bq34z100-g1 be programmed offline to operate in a stand-alone mode without a processor for direct display control of LEDs that will indicate remaining capacity and state of health of this battery set.

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    TI__Genius 10830 points
    Hi ,
    Your post has been assigned to one of our BMS experts.

    Regards,
    David
  • 0 in reply to David Hien
    TI__Genius 14985 points
    Hi Chris,
    Yes, you could connect the bq34z100-G1 to the top and bottom of the stack with proper circuitry and configure it for the LED display to always be on or to only display when a push-button is pressed. Section 7.3.13 of the datasheet has more details about LED display options. To configure the bq34z100-G1 you will need to go through the process of identifying the proper battery profile (chemID) using the GPCCHEM tool on ti.com, then performing a learning cycle of your "pack", as well as configure a number of other settings in dataflash. The final golden dataflash image can be extracted once you do this process and programmed into all of your production boards. Calibration of the voltage measurement of each production board would also be recommended since your voltage divider will likely have a fairly wide variance.