Hello,
i am trying to get BQStudio to work with my BQ76940EVM and EV2300. So far I am getting progress on how to communicate (boy, is this difficult...) with the board. Right now i am encountering the following problem:
I calibrated the Software and displaying of the cell voltages seemed to work fine. Then i noticed that i haven't openend the dip switches (Simulator still on). After opening them, i get an Cell Overvoltage Alert and after some time the board shuts down (this is good, i guess). When i check the cell voltages manually though, everything is fine. When i close the dip switches again, the software also shows normal voltages and no alert. I tried to calibrate the cell voltages by inserting each voltage by hand, but BQStudio then return the error message: 'Voltage Calibration - MAC command sent does not match MAC returned in read packet.'
I don't know what this is trying to tell me.
On another note, I still could't figure out how I tell the board to charge the batterypack. I connected a source with enough voltage and current to the PACK terminal and tried some ManufacturerAccess commands, that seemed logical, but nothing happend. The Source did not provide any current and the Voltage at the PACK terminal stayed on the Pack level (36V) and did not rise to the source's level (40V).
I hope you can clear up some of these problems. I think it is really hard to understand how to do thing with this board.
Best Regards and thank you,
Oliver Hawelka