BQ34110: bq34110

Serge Maloizel

Part Number: BQ34110
Other Parts Discussed in Thread: GPCCEDV

Hello

My intend is to use bq34110 to do the gas gauge of a 10S NiMH battery. To have the CEDV parameters, I made characterization of my battery and record time, voltage, temperature and current with data logger. Then I put these data in a GPCpackager (File VHTF_10S_GPCPackager attached below) as you request on your web site. Then you send back Gauging Parameter Calculator report but in this report you wrote: "The following errors were reported by the calculation engine: Accuracy Error: Deviation is so high that it is most likely due to anomaly in the data. Please check that data files have recommended format, units and test schedule". I checked the data files and as I didn't find what is wrong, I ask for your help.

VHTF_10S_GPCPackager.zip

over 5 years ago

0 Andy Liu (BMS) over 5 years ago

TI__Guru 52115 points

We will take a look at your data and then get back to you.

Andy

0 Andy Liu (BMS) over 5 years ago

TI__Guru 52115 points

Can you also share the GPC report you have received? Thanks.

Andy

0 Serge Maloizel over 5 years ago in reply to Andy Liu (BMS)

Intellectual 390 points

Hello

Attached GPC Report

VHTF_10S_GPCPackager-report.zip

0 Andy Liu (BMS) over 5 years ago in reply to Serge Maloizel

TI__Guru 52115 points

Thanks for the GPC report. I have been quite busy this week. Allow me to spend some time on your issue. I should be able to provide my feedback early next week. Thanks.

Andy

0 Serge Maloizel over 5 years ago in reply to Andy Liu (BMS)

Intellectual 390 points

Hello

OK I understand, with COVID-19, thinks are less simple.

Be in good health

Serge

0 Andy Liu (BMS) over 5 years ago in reply to Serge Maloizel

TI__Guru 52115 points

Hi Serge,

I see the data that have a high discharge rate show a very big SoC error in the GPC report. That should be the cause of the accuracy error.

I need to check with our algorithm specialist who is the author of this GPCCEDV tool and he should be able to tell the root cause.

Andy

0 Serge Maloizel over 5 years ago in reply to Andy Liu (BMS)

Intellectual 390 points

Hi Andy,

Did you have checked with our algorithm specialist who is the author of this GPCCEDV tool?

What is the conclusion?

Best Regards

Serge

0 Andy Liu (BMS) over 5 years ago in reply to Serge Maloizel

TI__Guru 52115 points

Hi Serge,

I have pinged my colleague again and will let you know once I get his feedback.

Andy

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

TI__Guru 52115 points

Hi Serge,

I have got some feedback from my colleague. Bascially, it is necessary to try different MinSOC and MaxSOC settings to achieve better results in your case. For example, you can reduce min value allows fit to include more of the low soc region. He tried the following settings and got much better results.

FitMaxSOC%=9

FitMinSOC%=3

LearnSOC%=7

See the GPC report below.

0456.GPC_report.zip

Andy

Power management

Power management forum

BQ34110: bq34110