BQ40Z50-R3-DEVICE-FW: BQ40Z50-R3 Learning Cycle tab missing in bqStudio

Ian Pearson

Part Number: BQ40Z50-R3-DEVICE-FW

1. When connecting to the BQ40Z50-R3 device through the EV2400 from bqStudio, I do not see the "Learning Cycle" tab. If I disconnect the USB cable and run bqStudio and manually select the BQ40Z60 gauge, the "Learning Cycle" tab is there. I would like to use the automated learning cycle feature using the relay drive out of the EV2400. Why is it not present for the BQ40Z50-R3 gauge and can something be done to make it appear?

2. I have a 4 series, 7 parallel battery pack configuration using LG INR18650MJ1 cells (3.65V nom, 3500mAh). I believe the Chem ID for this battery is 2152 as LG seem to interchange INR and ICR in some documents. When I perform a Chem ID test and submit to TI, the recommended Chem ID is different. When submitting the data, the confix.txt file requires you to specify the number of serial cells but there is no requirement for the number of cells in parallel. Will cells in parallel affect the Chem ID result? If so, is there a way for this to be correctly accounted for in the gauge's configuration?

3. BqStudio doesn't show the "Golden Image" tab for this device. Is this a deliberate omission? What is the procedure for downloading a golden image to the BQ40Z50-R3 device?

over 5 years ago

0 Andy Liu (BMS) over 5 years ago

TI__Guru 52115 points

See my comments below.

1. Just click on somewhere in the Registers tab and the "Auto cycle" menu will appear.

2.No. However, in order to get the best results, my suggestions is to use a minimum number of batter cells. In your case, I would suggest you just use two battery cells in series to collect the IVT log file.

3. Use the Firmware tab.

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

Prodigy 60 points

1. No matter where I click in the Registers tab, I cannot get the Auto cycle menu to appear. Please provide an exact example showing cursor position for the BQ40Z50-R3.

2. I have just obtained individual cells in order to do a 1 parallel test. Will the results not be correct with 4 series cells? If I can use 4 single cells in series, then I will start a characterization log soon.

3. Great, nice and intuitive!

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

TI__Guru 52115 points

1. See the screenshot below.

2. Yes, that should be also okay.

Andy

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

Intellectual 631 points

Hi Ian,

Unfortunately, I don't think the Autocycle function has been developed for the bq40z50.

Regards,

Jeremy.

0 JeremyG over 5 years ago in reply to JeremyG

Intellectual 631 points

Hi Ian,

I've just noticed that when I click on the Registers Tab, the AutoCycle menu appears, but if I click on the Dashboard or on the Data Memory tab, it disappears.

This explains why I couldn't always see it (in March last year), but I haven't checked to see if it works yet.

Regards,

Jeremy.

Power management

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BQ40Z50-R3-DEVICE-FW: BQ40Z50-R3 Learning Cycle tab missing in bqStudio