BQ40Z80: When use high rate discharge RSOC inaccurate.

Star Xu

Part Number: BQ40Z80
Other Parts Discussed in Thread: BQSTUDIO

My customer tests with 6S6P battery packs using BQ40Z80.

When performing high current discharge (greater than 25A), RSOC quickly dropped low (about 9%), and then 9% to 0 remained for a long time (DSG_SMOOTH is turned on).

Which causes the RSOC display inaccurate, and the RSOC display is normal when 0.5C (about 10A) discharge.

How to solve this situation?

Waiting for your reply.

Thanks

Star

over 5 years ago

0 Andy Liu (BMS) over 5 years ago

TI__Guru 52115 points

Can provide the customer's srec file before they ran the testing and also a bqStudio log file?

Andy

0 Star Xu over 5 years ago in reply to Andy Liu (BMS)

TI__Genius 9645 points

Hi Andy

Thanks for your reply.

Attached srec and log file.

The srec file before test is not saved.

6S6P shuixiajiqiren 20200604.zip

6S6P learning 0604.log

Please give some suggestions.

Thanks

Star

0 Damian Lewis over 5 years ago in reply to Star Xu

TI__Mastermind 34775 points

Hello Star,

The log provided doesn't show the behavior highlighted earlier. Can you please provide the log that match the behavior above. Here's what the log you provided shows.

Power management

Power management forum

BQ40Z80: When use high rate discharge RSOC inaccurate.