Dear All:
I use the BQ76930 to monitor the 20S cell voltage . I use the BQ76930 ADC to show each cell voltage as below.
I find the cell5 cell10 cell15 cell20 voltage is not correct. i use the oscilloscope to monitor the abnormal cell voltage i find the abnormal voltage drop 200mv every. 2S as below
the schematic as below
Can you tell me what cause the error result ?How can i modify the circuit to solve the problem? Thanks~