BQ34Z100-G1: Configuring the BQ34Z100 using the EVM2400

Archana singh

Part Number: BQ34Z100-G1
Other Parts Discussed in Thread: GPCCHEM, BQSTUDIO

Tool/software:

My FCC and RC are showing 1000mAh, even after several learning cycles, while the TrueRCC and TrueFCC values are reaching 8500mAh. I have set the design capacity to 9000mAh for the new 2S3P5SWS 7.2V Li-ion battery pack. Can anyone explain me why the FCC and RC are only reaching 1000mAh instead of being closer to the expected 9000mAh?

5 months ago

0 Alan Frias 5 months ago

TI__Mastermind 25225 points

Hello Archana,

The E2E has been assigned and will be answered promptly

Thank you,
Alan

0 Alan Frias 5 months ago in reply to Alan Frias

TI__Mastermind 25225 points

Hello Archana,

There could be multiple different reasoning behind your issue. Seeing how TrueRc and TrueFCC is good it is hinting that the issues is within how you setup the parameters in the data memory tab in BQStudio and/or ChemID. The easiest solution is that there is a filter from TrueRC/TrueFCC to RC/FCC called StateOfCharge() Smoothing founded in section 3.2.15 within the technical reference manual. However the big difference in values could also be coming from a improper chemID being used, I would suggest redoing the calibration of the units in the calibration tab and submitting a GPCCHEM file to see if you can get a chemID with the a error difference of 3%. It's also a good practice to recheck the parameters set within the data memory and especially due to this gauge using scaling on the design energy, voltage and current and the rest of the parameters would need to be proportional to the values set.

Technical reference:
https://www.ti.com/lit/ug/sluubw5a/sluubw5a.pdf?ts=1741893647285&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FBQ34Z100-G1

GPCCHEM:
https://www.ti.com/tool/GPCCHEM

Thank you,
Alan

Power management

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BQ34Z100-G1: Configuring the BQ34Z100 using the EVM2400