• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 534 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.

bq20Zxx and Golden Flash data

ZT
Prodigy 10 points
Other Parts Discussed in Thread: BQ20Z80

When creating a Golden Flash file for any of the bq20zxx family of fuel gauges is it recommended to reset the QMax and DoD (if applicable) values to default after the learn cycle has completed?  If not, If the learned values were reset what might be the drawbacks?  Are there any documentation explaining the proper procedure, in detail, that explains the correct process for creating a Golden Flash file for production use for bq20z75, bq20z80, bq20z95 and bq20z/45/65?

  • 0
    TI__Genius 10235 points

    After the learning cycle is complete, you should NOT reset Qmax or Ra to their default values. The point of the learning cycle is to learn these values for your specific pack configuration. You can then load this data into each of your packs and you will have good accuracy right out of the box.

    As for configuring the bq20zxx devices:

    For bq20z8x, 7x, and 9x, you can use bqEasy to help configure the gauge. It is a step-by-step process of configuring the data flash, calibrating, loading the chemistry ID, and doing the learning procedure.

    For the bq20z4x and z6x, bqEasy has some known issues on some machines. You can try using bqEasy, but it may not work properly. Instead, you can use the data flash help text (available in EVSW). Just right click on a parameter in the Data Flash screen and click Help Text. This will open up a document which describes each parameter and helps with configuring it.  Calibrating can be done by following the instructions in SLUA409. Loading the chem ID can be done using bqEasy. Simply skip ahead to section 4 and select "Yes, Enable chemistry selection" to load your ID in to the gauge. The learning procedure can be done by following section 2 "When no close Qmax value is known" in SLUA334B. The documents can be found on ti.com using the search engine.

    You can also refer to this post (it may not show up correctly in IE, but it works in Firefox):

    http://e2e.ti.com/support/power_management/battery_management/f/180/t/128277.aspx