Voltage sensing interference phenomenon during balancing

Hi, i bought the DC2100B-C EVM board and finish the fundamental instruction guide.

I just start the cell balancing by using given GUI. 

There is a problem with voltage sensing during balancing.

When the balancing is on for the cell 2 (for example), the voltage values of cell 1 and cell 3 are also changed.

It disables voltage based cell balancing.

Is there any method to compensate this voltage interference??


there is a type cell 3 not cell 2
[edited by: W.Y.Kim_Kr at 9:45 AM (GMT 0) on 31 Oct 2019]