The LEAF protects the charging and discharging process
so that no cell (96 cell-pairs) gets too high, or too low,
and that the cells stay within a "usable" range of the
"real SOC", which is 95% SOC when filled to 100% usable.
Filling to 80% usable (80% "real SOC") is the other charging
option given by Nissan, which many use whenever they
do not expect to travel very far the next day.
When charging with Chademo, and starting below 50%,
the LEAF stops the charging at 80%. When starting
(or re-srarting) the charging above 50%, the LEAF
will continue charging (at decreasing currents, controlled
by the LEAF's internal charging controller) until "full".
So, the LEAF certainly tries to protect all the 96 cell pairs.