Sizing a Heterogeneous Battery System for an Offshore Vessel: Methodology and Application

Waterborne transport sector is essential to our everyday life as ships deliver more than 80% of the world's trade. Electrification of waterborne transport with batteries is the focus of the current paper. Battery systems for vessels tend to be monotype and hence are oversized to meet the vessel operational profile and lifetime requirements. Heterogeneous battery systems offer a solution to that challenge by better fitting the vessel requirements. The present paper details a methodology to size a heterogeneous battery energy storage system made of high-energy (HE) and high-power (HP) battery modules. The methodology is then applied to a real case study of an offshore vessel to be hybridised with a 1MWh battery solution. The resulting HE and HP share is 18% / 82% respectively.