I am working on charging lithium-ion batteries (NMC chemistry, max. charge voltage is 4.2 V).
In charging mode, after the cell has reached 4.2 V, the charger goes to CV mode, and after this, charging ends (based on cut-off current).
As I understand it: in CV mode the battery chemistry stabilizes; due to this we may get good capacity and life cycle.
What happens if we charge the battery to 4 V (not up to 4.2 V) using CC mode and eliminate the CV mode? This means we are not charging to 100% (capacity is not an issue in my application and I want to reduce the charge time).
Can we eliminate CV mode when charging? And when charging like this, will there be any battery degradation/life cycle/capacity issues?