BQ40Z80: Inquiry regarding BQ40Z80 capacity display

Grady Lee

Genius 4215 points

Part Number: BQ40Z80

Hi, TI expert

During the customer's review of the BQ40Z80, there are inquiries regarding capacity display.

Shortly after charging/discharging starts, 100%/1% is displayed...

What part do I need to modify to set the capacity below?

over 1 year ago

0 Anthony over 1 year ago

TI__Mastermind 28490 points

Hi Grady,

Has a learning cycle been completed for this gauge and cell?

Also, is there a log file of this occurrence and a .gg file of the gauge we can take a look at to see what is happening within the gauge?

Regards,

Anthony Baldino

0 YANGHO PARK over 1 year ago

Prodigy 40 points

test_lipo4_23_Second.gg.csv

I worked as below. What did I do wrong? Is there anything you haven't done?

1. F/W Write (bq40z80_v0_04_build_5.srec)
2. Chemistry Program (Tenegy, 30078 15Ah)
3. Data Memory Write (file attached)
4.Reset
5.Charging

Battery LIFE4 15Ah, 7S1P

0 Anthony over 1 year ago in reply to YANGHO PARK

TI__Mastermind 28490 points

Hello,

Based on the .gg file above, there has been no learning cycle completed on the cell. This is typically when the gauge learns the necessary parameters for accurate gauging, along with SOC, SOH, etc.

Also, can you please confirm that 15Ah is the capacity of a single cell in the stack? The design capacity should be set to the capacity of a single cell in the stack.