As we know that battery discharged with different DoD have different life cycle, which is usually described as lower DoD with more life cycle. And I found that there is a euqation to estimate the life cycle of battery shown as\
total life cycle = a*DoD^b
where a and b are special coefficient for different types of batteries.
I think the life cycle here means the charging/discharing times (not the times of fully-charge/discharge). Please just regard the life cycle as charge/discharge time here.
But the problem is, how do we definite the life cycle. To which condition we can think the battery is retired.
I mean that, if we say a battery can cycle 2000 times with a 50% DoD, does it means that the state-of-health (SoH) of this battery will decrease under 50% after 2000 cycle times? or it means that the SoH decrease to zero? or a special value setting as the 'retired level' by the manufactor?