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BQ27542-G1: Generate a Golden Image Procedure

ghada dhibi
Intellectual 520 points
Part Number: BQ27542-G1
Other Parts Discussed in Thread: BQSTUDIO, BQ27542EVM, EV2400, GPCCHEM

Dear TI Engineer,

I would like to configure my BQ27542-G1 fuel gauge in order to manage my Li-Polymer Battery, 

I already submitted a post in this forum (https://e2e.ti.com/support/power-management/f/196/t/795981), and I understood that I must use the bqStudio, the EV2400 and the BQ27542EVM in order to generate a whole golden image and use it to flash all my on board customized BQ27542-G1 . I am using the latest bqStudio version : 1.3.86. 

So, I got the necessary equipment and I am successfully able to communicate with the BQ27542-G1 over bqstudio. 

From what I understood for the first time, that I have only to change the settings in the Data Memory interface, but it didn't solve my issue. 

So, I think that I have to follow what is indicated in the Appendix C (Impedance Track Gauge Configuration) of the reference manual (http://www.ti.com/lit/ug/sluub65a/sluub65a.pdf) 

1. did you confirm I am on the right path ? 

In the first step, I have to determinate the ChemID, by using the list of battery chemistry ID in the bqStudio,

even if I make the update of list of available chemistry ID available under your website, I didn't find my battery model. 

Note that I am using this battery: https://www.texim-europe.com/getfile.ashx?id=108376 

2. Can you confirm that the chemistry ID of my battery is not available on your list ? 

In this case, I think that I have to use the GPC Tool to obtain a properly matched chemistry ID (ChemID) for my cell (http://www.ti.com/tool/GPCCHEM)  

And to obtain the ChemID I have to submit log files of a learning Cycle, that is already described as a next step of the Impedance Track Gauge Configuration (Appendix C ), 

3. should I have to do the learning cycle twice ? One to generate a ChemID and another to generate a Golden Image? 

4. which mode should I use?, the normal, Automated or GDK mode? when using the bqstudio ? 

I starts to generate log files, but the result is not the same of what indicated in the video in this link http://www.ti.com/tool/GPCCHEM : 

In the video, the output file is csv file is described as below: 

My Log output file is .log file and described as below: 

5. Is It correct ? or should I generate the same csv template file ? and how? 

6. should I have to add my own configuration in the Data Memory interface before generating the golden Image ? like OT Chg, Design Voltage and Design Capacity.... 

7. Can I find an application note that describes step to generate Golden Image ? 

Best Regards, 

Ghada. 

  • 0
    TI__Guru* 76230 points

    Hi Ghada

    App note below describes step by step what needs to be done.

    http://www.ti.com/lit/an/slua917/slua917.pdf

    1. Even if cell is listed, we still encourage you to run the rel-dis-rel to described in the gpcchem tool ot determine a close chem id for your cell.

    2. see 1 above.

    3. The first step though similar to a learning cycle is not a learning cycle. You are just identifying  a close chem id  match.

    4. if you have a gdk tool, then you should use the gdk mode. Essentially the gdk will automatically control the charge and discharge cycles. You can create use your file as is (just make sure to input the column name correctly in the config file.) or you can just copy out the elapsed time, current, voltage and temperature to create your own log file that will be submitted..

    5. See 4 above.

    6. yes. 

    7 See link above.

    thanks

    Onyx