• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 334 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ28Z610: PCB Calibration and Final Battery Pack Calibration Recommendations

Daniel Jakl
Prodigy 30 points
Part Number: BQ28Z610

The fuel-gauge/protection IC we are using is a bq28z610.  We wish to automate our factory End of Line testing and haven't been able to locate recommendations in regards to "Calibration" during each stage of production.  For example we will have a PCB level End of Line test as well as a Final Battery Pack assembly End of Line test.

Calibrate voltage (Only needed at PCB level?)

Calibrate temperature (Only needed at PCB level?)

Calibrate Current (Should this be executed at both test stations; or for certain after the cells a attached)

etc.

  • 0
    TI__Guru 62386 points

    In general, it is not necessary to calibrate each unit, assuming that your temperature sensor and the sense resistor are consistent between units.

    The most important calibration (coulomb counter offset) is automatic (controlled by the gauge).

    Current calibration should be done during golden image creation (for your specific sense resistor). It is typically not necessary to perform this during production. If your sense resistor is not accurate from unit to unit, then you will have to calibrate this after either at the "PCB Level" or after the cell is attached. This will adjust the gain factor that the gauge uses to calculate current in mA from the coulomb counter ADC result so it's  important to "know" the true current through the sense resistor.

    Voltage calibration is typically not necessary (it comes calibrated from TI).

    Temperature calibration depends on your thermistor. It can be done either with the cell attached or without the cell attached.