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BQ27510-G3: Retrieve configurations of existing golden files

Ly Minh Duy (Michael) Le
Prodigy 10 points
Part Number: BQ27510-G3
Other Parts Discussed in Thread: BQSTUDIO,

Hello TI

We are using this part number for battery gauge application. We have 2 golden files and want to check and then compare the configurations in these 2 files. The format of golden files that we have is *.fs.

How to retrieve configurations of these 2 golden files using BQstudio software? Please support.

  • 0
    TI__Guru 57747 points

    Hello Ly,

    bq27510-G3 golden file consists of external and internal data. External data is set by user using Data memory tab of bqStudio. You can load the *.fs file to the gauge and read the data memory using bqStudio. Export the data memory gg.csv file .Then compare the gg.csv files.

    The internal data cannot be compared and is related to learning data. If the golden image is generated a second time, this data can be different because the battery cycle will not be exactly the same. The most important part is the chem ID. This can be read out after programming the *.fs file.

  • 0 in reply to Shirish
    Prodigy 10 points

    Hello Shirish,

    Thank you for your reply and instruction. 

     Background: There are 2 golden files (versions V0 and V1). In term of battery capacity gauge, GF V0 works well, but V1 does not.

    We have loaded the golden files to the BQ EVAL board and exported the data from the memory as per your instruction.

     

    I have made the comparison between the two golden files – versions V0 and V1 (Natus_GF_V0_V1_Compare.pdf - left side is V0, right side is V1). As can be seen, the CHEM IDs are the same (2012). 

    From this comparison, it is observed that there are some potential deltas that may cause the issue in the golden file version V1 such as:

     

    1. Update status:  Update status of V0 golden file is 2 and of the V1 is 0. From the Technical Reference Manual, I found that that a golden file with optimized Qmax and resistance values should have update status = 2. As you also see in the difference report, the Qmax from V0 GF is 6000 mAh, while from V1 GF is 1000 mAh, which is inconsistent
    2. Load mode: Load mode in V0 GF is 1, whereas in V1 GF is 0. This indicates that they use the constant-current model in V0 and Constant-power model in V1. I don’t know yet if this load mode may cause an issue. 
    3. Dsg Current Threshold: In one of the application notes from TI, this threshold should be set below C/10. In V0, it set as 60mA, while in V1, it set as 75mA which is more than C/10. (C = 6400 mAh)

    Could you please look at this comparison and give some hints on potential deltas that makes GF V1 report wrong battery capacity? And also please comment on my above observation.

    Natus_GF_V0_V1_Compare.pdf

  • 0 in reply to Ly Minh Duy (Michael) Le
    TI__Guru 57747 points

    Hello Ly,

    In V1

    "OCV Tables","OCVa0 Table","Qmax Cell","1000","mAh"

    This is a 6X difference. If V1 is not reporting capacity correctly then the recommended procedure is to start by importing the correct GG file and do the learning to create the golden image again and test with the new golden image. There is no way to fix a image that is not accurate.