• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 1516 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.

BQ34110: Fuel gauge programming procedure

Eduared Theron
Prodigy 10 points
Part Number: BQ34110
Other Parts Discussed in Thread: BQSTUDIO, GPCCEDV

Hi

We are trying to get a BQ34110 programmed and creating a golden sample for manufacture.

Is there document describing the procedure/steps from beginning to end that we can follow?

There seems to be a lot of loose information available, but we keep getting stuck, not knowing where we are going wrong.

E.g We do not know exactly which values in BQStudio Data memory needs to be changed and during which stages of the process.

E.g question: Is appears that sometimes we manage to change a value, but other times the value goes back to it previous value. Is there an order in which changes are to be done?

Our battery details are: 10 cells NiMh all in series, 4.5Ah. Cells are 1.2V.

Currently we update our EV2300 from 1.3c to 1.3m and find that we cannot update data memory. 

We get an error message; "No parameter matched address" (?)

Thank you for your help.

Eduard

  • 0
    TI__Mastermind 25955 points
    Hi Eduard,

    We are in the process of creating specific collateral that describes the steps of configuring the device with a focus on NiMH.

    To aid in the interim with your specific number of series cells and chemistry:

    Before settings any other parameters, in bqStudio please update the following:

    Data Memory > Configuration > Power > Flash Update OK Voltage = 0

    The default values for the gauge are based around lithium values. These will all need to be modified. Most parameters in this gauge are based around the single cell value and are found in the datasheet of your cell. For example, most NiMH cells have a nominal voltage of 1200 mV with a max voltage of 1500 mV. Most of the gauge defaults are set for 4200 max voltage 3700 nominal voltage Lithium Ion cells. When reviewing your parameters, if you see values that are over 1500 mV (or look at is they don't apply for your battery), please make sure to look them up in the TRM (found here: http://www.ti.com/lit/sluubf7 ) and set the values accordingly.

    Also, your operation configuration register will need to be modified for NiMH. Unlike Lithium cells, Delta T/dt and Negative Delta Voltage/dt are used for charge termination. Please refer to section 2.1.1 of the TRM linked above for information on how to configure the Operation Config A register for NiMH.

    After using the GPCCEDV tool, please use the values from the OCV11 file to configure the Voltage 0% DOD through Voltage 100% DOD values found in Data Memory > Gas Gauging > CEDV Profile.

    The EDV0, EDV1 and EDV 2 values will also need to be set based upon the 0%, 3% and 7% SOC levels of your cell with respect to voltage.

    Sincerely,
    Bryan Kahler