Good morning,
the BQ78350-R1 does not allow the cell balancing if the battery pack is not in charge state. The reference manual clearly reports such a condition: "Cell balancing only occurs when charging current is detected, ..."
Why there is such a limitation? Is there any way to bypass it?
In fact in several applications the balancing actions must be active also at the end of a charging phase (I've found several BMSs with this characteristic), otherwise a complete and perfect balancing cannot be performed (i.e. the balancing is almost unuseful).
If there are no other important reasons, I would suggest to create in a future firmware release also a configuration flag to enable the balancing when the battery pack is not in charge.
Thank you and best regards
Matteo