Hi.
I am designing 8S PCM with bq77915.
You said, "Generally keep the cell count balanced between devices. When the cell count does not match, section 9.3.13 of the data sheet recommends using the higher cell count on the upper device."
It is highly recommended to connect higher cell count to the upper devices (for example, for a 7-series configuration, connect four cells on the upper device and three cells on the bottom device).
This is to provide stronger CTRx signal to the bottom device.
So, which is better? 5-3 configuration and 4-4 configuration.
Thank you.
Pi