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Question about Battery Chemistry (using the bq20z80A-V110)

Paul K.
Prodigy 160 points
Other Parts Discussed in Thread: BQ20Z80A-V110

 

Hello,

I have a question about the battery chemistry table contained in the slua372R.zip folder.  I have used the bq20z80A-V110 in the past with a 3s1p (1320mAh) and 3s4p (7600mAh) Li-ion Polymer pack, made up of cells manufactured by Saehan. Only about a year ago did the chemistry_selection_table in this .zip folder show support of these types of battery cells (manufactured by Saehan), and are under "chemical ID" 0116 (the description is LiCoO2/carbon 9), and since then I have been using this chemical ID for making new battery packs with fuel-gauges. After comparing the discharge/charge data and cell resistance tables (in the .gg files) with my old ("old" meaning, before this chem. ID 0116 showed up on the supported list) chemistry data, and both look similar, seem fine, and work good.

However, I now see there is a new entry in this same table with chemical ID 0148 (with a similar description -- LiCoO2/carbon 9, -20C).  Other than the -20C, both entries (this chem ID, as well as the former I mentioned) seem to be the same.  Can you please explain which one I should be using now?  I can give more info also (if required) as to which cells (and ultimately battery packs, which are re-packaged by the vendor) we use.

Thank you,

-apostolos

  • 0
    TI__Expert 6470 points
    Apostolos,
    As long as you aren't having any problems with ID 116, you should just continue to use it.  ID 148 was probably made specifically for one customer who asked to have a -20C ID created. Generally, there is no reason to use those IDs, and they should probably be avoided since they most likely have slightly lower 25C accuracy.
    Regards,
    Doug