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INDUSTRY GROUP LAUNCHES MARITIME BATTERY HEALTH STUDY

Friday, November 20, 2020 

A group comprising research institute Fraunhofer ISE, battery supplier Corvus, Costa Group Carnival Maritime and DNV GL have launched 'DDD-Batman', a new project to study maritime battery health, and help build confidence in the safety of hybrid and electric systems.

The project is sponsored by MarTERA, an EU Horizon 2020 scheme. According to DNV GL, onboard battery systems are increasingly becoming an attractive solution in many shipping segments. In addition to pure electric vessels, batteries can enable significant gains in efficiency and emissions reductions in many ship types.

The objective of the DDD-Batman project is to develop data-driven methods for diagnostics and prognostics of battery systems and to provide methods for verifying the battery state of health (SOH) based on real-time sensor measurements. Continuous operational sensor data of the temperatures, discharge rates, voltages and impedance behaviour can be used to model and forecast the degradation of the battery – showing the SOH at any time.

Sverre Eriksen, Senior Principal Engineer, DNV GL – Maritime, said: “At the moment, vessels that depend on a Li-ion battery system need an annual validation test of the battery’s SOH. At DNV GL we require an annual validation testing of a battery’s SoH for ships utilising Li-ion battery systems for propulsion or manoeuvring. This can be quite time consuming and has some limitations in the data we obtain. As batteries continue to penetrate the industry, we need to improve the data we have, especially as we see batteries in operation for longer periods. The DDD-Batman project could result in us having much better data on the health of a battery system, enabling predictive maintenance strategies and offering a better look at the remaining useful life of the battery.”

The project will collect operational data from ships in addition to laboratory data and develop reliable and secure strategies for data collection, storage and sharing. The primary focus will be on battery systems for cruise ships, including battery lifetimes, replacement strategies, life cycle assessments and shore connection procedures. DDD-Batman is also looking to set new standards for reliability and lifetime prognostics, deliver recommendations and give input to standards, recommended practices and class rules for batteries. The project hopes to increase confidence in battery-powered ships, making batteries a more attractive alternative and helping to enhance shipping’s uptake of electric propulsion systems.

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