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bqstudio with bq27510-G3 no battery chemistry match

Gerry Sutton
Prodigy 130 points
Other Parts Discussed in Thread: BQ27510-G3, BQSTUDIO

I am using the bq27510-G3 fuel gauge and cannot find a match for my battery.  My battery is the VARTA LIC 18650-26 HC 2600mAh .

I have updated the bqstudio software with the latest chemistry zip file and cannot find chemistry with the same capacity, etc. The closest VARTA entry in the list only has half of the capacity and the wrong voltage.

I understand there is a MathCad based tool that can be used for this but do not want to buy Mathcad just to use this one battery.

What are my options on finding the best match for my battery?

What happens if there is no match?

The chemistry section mentions the default chem. id for a typical Li-ion battery. What is this chemical id number?

  • 0
    Genius 3970 points

    Hi Gerry,

    If running Mathcad on your own machine is not an option, you can submit a log file on the forum, and one of us can run your log file through the Mathcad tool and see if a chemistry ID is available for your cell. If not, you'll need to contact TI and arrange for them to characterize your cell for you. One thing to note when running the Chemistry ID log is that you will need to place a thermistor directly on the cell body, as the tool requires accurate temperature data to perform its analysis.

    To perform the Chemistry ID log:

    1. Click "Start Log" in bqSTUDIO (on the top right corner of the Registers pane), then select the location and file to save the logged data. After clicking "Save", the logging process will start. The button should read "Stop Log" at this point.
    2. Fully charge the battery, and let the charge current taper off until it goes down to C/100.
    3. Let the battery relax for at least 2 hours.
    4. Discharge the battery at a C/10 rate, and let it run down completely.
    5. Let the battery relax for at least 5 hours.
    6. Click "Stop Log" (same location as the "Start Log" button), and upload that .log file to the forum thread. Using that data, we can try to find a matching Chemistry ID for your battery.

    I've attached a .pdf that has more instructions on how to perform the Chemistry ID selection. The default chemistry for Li-ion is 0x0100, but many of TI's gauges are also programmed with IDs 0x0128 and 0x0107.

    /cfs-file/__key/communityserver-discussions-components-files/196/5531.4135.Chemistry-selection.pdf

    Regards,

    Jason