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BQ27Z746EVM-047: During the learning process, SOC decreases during charging

fenghaiyan ymyl

Prodigy 150 points

Part Number: BQ27Z746EVM-047
Other Parts Discussed in Thread: BQSTUDIO

Tool/software:

Hello,

The battery experienced an abnormal phenomenon during the learning process: the SOC initially increased to 1% during charging, and then decreased to 0. Is there any way to improve it? Is there a register that can prevent SOC from dropping during charging?

I'm looking forward to your reply.

Thanks.

over 1 year ago

0 Jonny over 1 year ago

TI__Mastermind 24751 points

Hello,

Can you please provide me with the full bqStudio log file with this behavior, and the gg file?

Regards,

Jonny.

0 fenghaiyan ymyl over 1 year ago in reply to Jonny

Prodigy 150 points

Hello Jonny,

This is the LOG data and gg file.

Thanks.

BQ27Z746-0624CX-Learning-20240624.log BQ27Z746-AfterLearning-20240627.gg.csv

0 Jonny over 1 year ago in reply to fenghaiyan ymyl

TI__Mastermind 24751 points

Hello,

Thank you for providing the requested files. I have looked over the log file, and I do not see this behavior you are describing. From what I can tell, the gauge is performing as expected.

Regards,

Jonny.

0 fenghaiyan ymyl over 1 year ago in reply to Jonny

Prodigy 150 points

Hello Jonny,

The abnormal phenomenon is located at two positions in the following figure, with Samples 21111 and 50166.

Thanks.

0 Jonny over 1 year ago in reply to fenghaiyan ymyl

TI__Mastermind 24751 points

Hello,

Can you please provide me with your .srec file that you are using? Additionally, how was your chemID matched?

Regards,

Jonny.

0 fenghaiyan ymyl over 1 year ago in reply to Jonny

Prodigy 150 points

Hello Jonny，

This is the SREC file，ChemID is 7552. We sent the batteries to TI for modeling.

Thanks.

BQ27Z746-ID7552-CX-AfterLearning-20240702.rar

0 Adrian over 1 year ago in reply to fenghaiyan ymyl

TI__Mastermind 37761 points

Hello,

Today's a national holiday. We will get back to you tomorrow.

Regards,

TI Apps Team

0 fenghaiyan ymyl over 1 year ago in reply to Adrian

Prodigy 150 points

Hello Jonny，

Please help to see if there are any ways to improve this issue

Thanks.

0 Adrian over 1 year ago in reply to fenghaiyan ymyl

TI__Mastermind 37761 points

Hello,

The team is still analyzing this and are currently discussing with the firmware team.

Regards,

Nick Richards