BQ40Z50: how to read correct cWh

Yuxi Liu(Tony)

Part Number: BQ40Z50
Other Parts Discussed in Thread: BQSTUDIO

Tool/software:

Hi TIer

When we recently read battery information, we wanted to read capacity in the form of cWh, and the results were very different. Please help analyze what happened? Thanks a lot

We change the 0x0F RemainingCapacity() == 1

use BQstudio read the cWh value.it is not correct.

But when we read mAh ,value is correct

could you give me some suggestion?

over 1 year ago

0 Anthony over 1 year ago

TI__Mastermind 28450 points

Hello,

Just for clarification, are you attempting to change the 0x0F RemainingCapacity() register? We would not recommend doing this due to it being a read only register.

To have the data presented in cWh, I believe the CAPM bit you have outlined needs to be high. Can you please tell me what is being received when that bit is high?

Also, has a learning cycle been accomplished on this cell already?

Regards,

Anthony Baldino

0 Yuxi Liu(Tony) over 1 year ago in reply to Anthony

TI__Expert 3040 points

we dont change 0X0F, Only change CAPM

0 Yuxi Liu(Tony) over 1 year ago in reply to Yuxi Liu(Tony)

TI__Expert 3040 points

Hi TIer

Another question:

What is the detail of different between 3 Average Current() and 7 Max Arg I Last Run?

0 Anthony over 1 year ago in reply to Yuxi Liu(Tony)

TI__Mastermind 28450 points

Hello,

Can you please confirm if a learning cycle has been completed on this cell yet? This could be a reason why the values being displayed are potentially incorrect.

Regarding the different load selects, more information about each option can be found in Section 2.2 of the document below:

http://www.ti.com/lit/pdf/slua948

Regards,

Anthony Baldino

Power management

Power management forum

BQ40Z50: how to read correct cWh