BQ40Z80: Ra table not updated for cell-6 After learning completed

Hello,

There is something that seems to be disabling the resistance updates during the discharge, which can be seen by the movement of RDIS. Can you please tell us where the chemID was found for this application?

Regards,

Anthony

Hi Anthony,

The chemid we got it from TI. Which is 4121. But the other 5cells Ra table values got updated right,only cell6 was not.

Thanks & regards

Uday

Hi Uday,

Understood, thank you for confirming. Does this follow the cell if they are rearranged into a different order or if cell 6 is swapped out? Also, do you have a .gg file from before the learning cycle takes place?

Regards,

Anthony

Hi Anthony , 

This Pack is a 6S4P pack which is welded, so its difficult for the cells to be rearranged or swapped out.

Attached the GG file before learning for your reference .Learning_Parameters.gg.csv

Thanks , 

AV

Hi AV,

Thank you for confirming, it is difficult to determine whether this is being caused by the cell since it cannot be removed or rearranged. Are there any other full packs the pack can be swapped out with to see if this issue continues?

Regards,

Anthony

Hi Anthony ,

We have another pack , with which we are repeating the learning cycle.

Meanwhile , have you got any info from the gg.csv (one before the learning cycle takes place) that has been shared.

Thanks , 

AV

Hi AV,

Understood, please share the results when received.

Regarding the prior .gg file, it seems like there is a large amount of variation between the original Ra table values and the newly created ones, however since the other cells were able to update it seems feasable.

Regards,

Anthony