Y 9 . ET 5 . 3 : Battery Degradation Model for Real - Time Levelized Cost Calculation

1. Project Goals The objective of this task is develop (or adopt from literature) a model that estimates the battery degradation as the function of the DESD use profile. The off-line degradation model supports system cost-benefit studies while the on-line implementation resides on the DESD ARM board (BeagleBoneBlack), and supports the IEM application. The on-line model will be implemented on the newly-developed AC DESD platform, which uses the new Lithium Titanate (Li4Ti5O12 or LTO) batteries. The on-line battery degradation model will expand the capabilities of the standardized DESD communication and control platform developed in past years, which already contains safety (voltage, current and temperature monitoring) and battery management functionalities. Therefore, the main goals of the project are (1) redesign the FREEDM AC DESD unit to use SCiB batteries and associated battery management and protection features, and (2) develop and implement an on-line battery degradation model that determines the instantaneous cost of use of the DESD.