Other Parts Discussed in Thread: BQSTUDIO
We need an option to disconnect our battery pack from the device for long periods using firmware (we do need that the disconnected cell will not charge, even if charger is connected and will not discharge till firmware will enabled it again). We have tried two methods in order to open CHG & DSG external FETs , both were failed:
1. Using the FETtest register – From some reason , when applying 0x0083 to 0x73,0x74 register only one FET is being closed – sometimes it is the CHG and sometimes it’s the DSG - It may depend on cells charge/discharge status, if yes – how can I permanently disconnect the two FET , together?(no matter what is the cell current direction when disconnecting it).
2. Another option we have tried is to set OT conditions below the current temperature reading (both for charge and discharge) , using the BQstudio we have changed the relevant values in the flash , reset the device but still FET were closed and no OTC flag was raised (all other device configuration are at default).
Did we missed something? Any other option for such a control over the transistors?