Following a full discharge cycle matching the expected FCC by 0.1% (very good!!), I charged the pack to about 55% (~7300mAh).
I sent (twice) the shutdown command to my BQ78350. It went down properly, or at least appeared to do so.
I disconnected all the cells then reconnected them.
After booting the BQ, the coulomb counter went from about 7300mAh to about 10700mAh. I saw it live in Battery Studio. SOC went up from about to 55% to about 80%. SOC, FCC and coulomb counter all match but where does that extra 3400mAh come from???
It is not the first time I do a shutdown and cells disconnect. It always appeared to stay at the same SOC after rebooting.
Now that I try charging the pack, I quickly get an overcharge fault because the coulomb counter reaches FCC+OC Threshold.
What could have happened?
How can I put the coulomb counter back on track again?
Thanks
Fred