BQ76930: Cell-0 Voltage shows deviation when under load among 10 Cells

Hi Rohit,

Can you share your schematic? Do you have resistor and capacitor filter components on VC0 and VC1?

Thanks,

Matt

Dear Matt  ,

Dear Matt,

Dear Matt,

Dear Matt,

Dear Matt,

Dear Matt, please find snaps of my schematic , as am unable to find option how to attached file to this reply.

Above is Lower AFE Schematic.

Above is Upper AFE schematic.

Matt apart from Above Cell-0 Matter, i have sleep/ Shut down current of 300micro Ampere, can you please see in schematic , as how to reduce it to 1micro Ampere?

Also here am unable to share attachement of Schematic, can you please share how to share full attachment of schematic , so that you can review eaisly.

Rohit

Hi Rohit,

Maybe you can create a zip file and upload it? Also, in the title of this thread are you saying that you are connecting 10 cells (instead of 20)?

Thanks,

Matt

Dear Matt,

Yes title is for 10 cells ,but actually my project is for 20S.

Please find attached pdf file for AFE section, Please look in to it for Cell-0 deviation from actual value while charge or discharge.

7571.BMS.pdf

Hi Rohit,

Since you say the deviation occurs while charging or discharging, I suspect there is an interconnect resistance between the bottom of Cell0 and the board, so you are seeing an IR drop when current is flowing. 

Regards,

Matt