BQ27426: Chemistry tab does not appear in bqstudio

Yaron Apel

Intellectual 290 points

Part Number: BQ27426
Other Parts Discussed in Thread: BQSTUDIO, , EV2400

Hi,

I connect to my fule gauge (bq27426) using a EV2400 board and bqstudio version 1.3.101.

The chemistry tab does not appear in bqstudio.

Please advise.

Thanks,

Yaron

over 4 years ago

0 Yaron Apel over 4 years ago

Intellectual 290 points

screenshot of the bqstdio attached

0 Wyatt Keller over 4 years ago in reply to Yaron Apel

TI__Guru** 105760 points

Hello Yaron,

This gauge is a ROM gauge, it has pre-programmed chemistry IDs that cannot be changed.

Sincerely,

Wyatt Keller

0 Yaron Apel over 4 years ago in reply to Wyatt Keller

Intellectual 290 points

Hi Wyatt ,

I know, that, but how do I choose the correct option out of the 3 pre-programmed options?

Thanks,

Yaron

0 Wyatt Keller over 4 years ago in reply to Yaron Apel

TI__Guru** 105760 points

Hello Yaron,

You have to send a command to the gauge, you can follow the TRM:

5.1.15CHEM_A:/B/C 0x0030/0x0031/0x0032

This subcommand instructs the fuel gauge to dynamically change the active chemistry after reset. A SOFT_RESET should be performed after running the CHEM_A/B/C commands. This subcommand is only available when the fuel gauge is UNSEALED. After this command is executed, a control status word CHEMCHANGE will be set to indicate that the chemistry has been changed.

There's also an example of the exact commands needed to do it manually with an MCU.

Sincerely,

Wyatt Keller

Power management

Power management forum

BQ27426: Chemistry tab does not appear in bqstudio