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BQSTUDIO: Why is the Gauge Parameter Calculator recommending Chem IDs that are not available?

Larry Norman
Intellectual 855 points
Part Number: BQSTUDIO

On 06-08-2018 the Gauge Parameter Calculator recommended ID 0457 for the K226650UE01 cell, and have also used this for other LiFePO4 cells going back to 2015.

I got a new PC and installed bqStudio 1.3.86 which had Chemistry Version 645. It did not contain ID 0457.

I installed Chemistry Version 724 - it does not have ID 0457.

I re-submitted my data through GPC. Highlighted below is the report, but 0487, 0485, and 0457, 0481, 482 and 6106 are not in Chemistry Version 724. This leaves only 445 (11.65%) and 461 (14.4%).

Why is the GPC recommending Chem IDs that are not available?

Best chemical ID : 487    Best chemical ID max. deviation, % : 9.1    
        
Summary of all IDs with max. DOD deviation below 15%        
        
Chem ID    max DOD error, %    Max R deviation, ratio
487    9.1    0.02
485    9.1    0.02
457    11.65    0.48
6106    12.99    0.39
481    13.46    0.03
445    13.56    0.55
482    13.92    0.05
461    14.4    0.47

  • 0
    TI__Mastermind 42535 points

    Hi Larry,

    The chem database is used for multiple products. So, it can contain chem data that may or may not be usable by your product. The tool itself is designed to find out the best match to the known IDs that we have. Therefore it lists that. However, if you have other IDs that match your battery in the list given by the tool, please use it.