BQ40Z80EVM-020: i'm not able to communicate bq40z80 with EV2400 adapter, im getting below error

Himavanth Reddy Gorla

Prodigy 60 points

Part Number: BQ40Z80EVM-020
Other Parts Discussed in Thread: EV2400, BQ40Z80, BQSTUDIO, BQ40Z50

over 5 years ago

0 Wyatt Keller over 5 years ago

TI__Guru** 105770 points

Hello,

It looks like the gauge is not communicating at all with the EV2400 from the interface, make sure to follow the steps in the user guide very carefully: https://www.ti.com/lit/ug/sluubz5/sluubz5.pdf?ts=1594217336910&ref_url=https%253A%252F%252Fwww.ti.com%252Ftool%252FBQ40Z80EVM-020

If there is still a problem, try to update bqStudio to the test version and update the firmware for the BQ40Z80. bqStudio should auto detect your EVM when you plug it in.

Sincerely,

Wyatt Keller

0 Himavanth Reddy Gorla over 5 years ago in reply to Wyatt Keller

Prodigy 60 points

there is communication problem. it looks like turns on and off the gauge

0 Andy Liu (BMS) over 5 years ago in reply to Himavanth Reddy Gorla

TI__Guru 52115 points

The bq40z80's default settings are for a 6s application. Did you follow the instructions in the bq40z80 EVM user's guide to have all the necessary connections done? Also, remember to press the Wake button to wake up the device from shutdown before you launch bqStudio to communicate with it.

Andy

0 Himavanth Reddy Gorla over 5 years ago in reply to Andy Liu (BMS)

Prodigy 60 points

Hi Andy Liu,

Thank you very much for your reply. As we are using a 6S configuration for the Battery pack the default software settings won't be a problem.

Kindly go through the schematic attached below for the 6S configuration, and do let me know about Design flaws(if any).

we never tried with the second solution mentioned in the mail, thank you for your suggestion. we can go ahead and do this.

Thanks & Regards

- Himavanth

BMS.sch

0 Andy Liu (BMS) over 5 years ago in reply to Himavanth Reddy Gorla

TI__Guru 52115 points

Could you provide a pdf version of your schematic? Thanks.

0 Himavanth Reddy Gorla over 5 years ago in reply to Andy Liu (BMS)

Prodigy 60 points

Hi Andu Liu,

Here is the PDF format of the Scimatic attached below. Kindly go through the schematic attached below and make some suggestions(if necessary) to improve the schematic.

BMS_sch.pdf

Thanks & Regards

- Himavanth reddy

0 Andy Liu (BMS) over 5 years ago in reply to Himavanth Reddy Gorla

TI__Guru 52115 points

I see the device bq40z50 is used in the schematic. Are you sure you provided the right schematic file?

Andy

0 Himavanth Reddy Gorla over 5 years ago in reply to Andy Liu (BMS)

Prodigy 60 points

Hi Andy Liu,

sorry for the wrong schematic in the previous post kindly go through the schematic attached below to make a suggestion for future improvements.

Thanks & regards

-Himavanth Reddy

1031.bms_schematic.pdf

0 Wyatt Keller over 5 years ago in reply to Himavanth Reddy Gorla

TI__Guru** 105770 points

Hello,

Looking at your schematic, are you connecting a common ground for the SMBus communication? I see the INT GPIO is connected next to the communication lines on the same connector.

Did pressing temporarily connecting BAT+ and PACK+ (the wake button function) help with communication?

Sincerely,

Wyatt Keller

Power management

Power management forum

BQ40Z80EVM-020: i'm not able to communicate bq40z80 with EV2400 adapter, im getting below error