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BQ34Z100: Chem ID numbering system

Steve Butler1
Prodigy 200 points
Part Number: BQ34Z100
Other Parts Discussed in Thread: GPCCHEM

Hi TI,

We have a run a number of Chem IDs on the same cell and obtained inconsistent results.  

ID 400 (11.3% error)

ID 414 (11.3% error)

ID 435 (13% error)

ID 436 (10.78% error)

ID 446 (14% error)

What can conclusion can I make regarding these Chem IDs being 46 numbers apart? 

- Do the Chem ID numbers represent Ra table or other cell characteristics? 

- Or is the Chem ID just the order the cells were added to the database?

- It appears that these Chem IDs must all be very close in characteristics since the error only varies ~3% across all 5 IDs.

My test procedure is using a single LiFEPO4 cell following the procedures recommended by TI Technical Ref SLV725A Simple Guide to Chemical ID Selection Tool

  • 0
    TI__Guru** 105760 points

    Hello Steve,

    The chem IDs are added as they are characterized, it has no meaning to the others. Depending on the chemistry the ID will change, LiFePO4 is 400s, primary is 600s, etc.

    It's best to run the test on one cell, not the whole pack for the GPCCHEM tool. 10% error is fairly high for a chem ID, it's recommended to be at least under 5%

    Sincerely,

    Wyatt Keller