  This paper presents a novel method to describe battery degradation. We use
the concept of degradation maps to model the incremental charge capacity loss
as a function of discrete battery control actions and state of charge. The maps
can be scaled to represent any battery system in size and power. Their convex
piece-wise affine representations allow for tractable optimal control
formulations and can be used in power system simulations to incorporate battery
degradation. The map parameters for different battery technologies are
published making them an useful basis to benchmark different battery
technologies in case studies.
