BQ27621EVM-G1 new board, no activity.

Tim Black

Prodigy 60 points

Other Parts Discussed in Thread: EV2400, BQSTUDIO, BQ27621-G1

Everything is set up exactly as shown in this doc http://www.ti.com/lit/ug/sluuam6b/sluuam6b.pdf

Everything is new out of the box, the cells attached are charged.

The studio seems to work ,comms with the EV2400 look correct, but it does not see any devices attached to the EV2400.

(no devices detected)

I have two of these board and they both do nothing.

Not sure where to go from here, everything looks right, but both the EVM boards are inert.

Did I miss something?

over 8 years ago

0 Kang Kang over 8 years ago

TI__Mastermind 24870 points

Hello Tim,

Could you paste a screenshot of what happens when you open bqStudio?

Could you also measure VDD pin on the EVM?

Thanks,

Kang Kang

0 Tim Black over 8 years ago in reply to Kang Kang

Prodigy 60 points

Cells were good, but the pack protector was disabled on the discharge side so the board was not getting power. It's working now.
Thanks.

0 Tim Black over 8 years ago in reply to Tim Black

Prodigy 60 points

What is the best way to scale this part for a 4P, 9AH pack?

0 Jason Gin over 8 years ago in reply to Tim Black

Genius 3970 points

Tim Black said:
What is the best way to scale this part for a 4P, 9AH pack?

Hi Tim, sorry for the delay in getting back to your question!

Divide the Design Capacity and Design Energy parameters by 10 (so a 9 Ah pack would be programmed into the bq27621-G1 as 900 mAh, and the same process would be applied to Design Energy). Just remember that you will need to multiply the capacity, power, and current readings from the bq27621-G1 by 10 to get the correct numbers (State of Charge is not affected as it's merely a ratio of the Remaining and Full Charge Capacity measurements).

Regards,

Jason

Power management

Power management forum

BQ27621EVM-G1 new board, no activity.