Other Parts Discussed in Thread: BQSTUDIO
hi,
we are testing the EVM and something seems off on the cell voltage monitoring, when testing the balancing.
I have connected a battery stack with 6 cells on pins 2 to 8 an left Pin 1 & 9 Unconnected.
I have jumper J2 and J3 ON to power the board from the battery
I have the SW2 on the OFF position and the on-board resistor ladder is Unconnected
BQstudio SET UP
I have the following configuration for Cell Voltage monitoring and Balancing
When I enable Balancing without the comparator the CB_RUN is completed
Then I check the Cell voltages during the balancing procedure.
The cell that is “bleeding” current has a voltage drop when measuring, around 0,665 Volts, and the cells that are next to the “bleeding” cells have a voltage rise.
ODDS balancing
EVENS balancing
Also because of the Voltage measurements are like this if I activate the Comparator, it immediately “completes” the balancing (I guess because CB_DONE_THRESH is triggered and CB_DONE is then set).
What are we doing wrong?
thansk a lot in advance
KR
Vincenzo
