BQ34Z100: Learning Cycle Interpretation of R_a0 vs R_a0x

Steve Butler1

Part Number: BQ34Z100

Hello,

I am working on producing a golden image for production. I am repeating the learning cycle several times and comparing the difference between the learned QMax and Ra table values. Can you please clarify how Ra values R_a0 are different from R_a0x?

1. Are both sets of values describing resistance?

2. Or is one set of values resistance and the other SOC?

Thanks,

Steve

over 4 years ago

0 Wyatt Keller over 4 years ago

TI__Guru** 105760 points

Hello Steve,

We use 2 sets of Ra tables so the DF values don't wear out, so depending on the Ra flag it indicates which table is currently being used.

You can reference this document: e2echina.ti.com/.../Theory-and-Implementation-of-Impedance-Track-Battery-Fuel_2D00_Gauging-Algorithm.pdf

Snippet from document:

The DF.PackX Ra flag and DF.PackX Rax flag are used for interchanging data-flash column usage for reducing the number of DF writes. A flag value of 55 indicates the presently used data column, whereas FF indicates the presently unused data column.

Sincerely,

Wyatt Keller

0 Steve Butler1 over 4 years ago in reply to Wyatt Keller

Prodigy 200 points

Thanks Wyatt!

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BQ34Z100: Learning Cycle Interpretation of R_a0 vs R_a0x