The electrification and hybridization of ships with Li-ion batteries has gained momentum becoming an important new business area for several industries in Norway. The largest battery system for a ship currently built stores several MWh of electric energy. The consequences of a fire in such a system can be catastrophic. The degradation and ageing of Li-ion batteries will in many cases contribute to reduced thermal stability. This can potentially affect the safety performance of the batteries.
This project relates to building in-depth knowledge for safety aspects of new and aged Li-ion batteries. The batteries are intended for use in maritime applications with a strong requirement for long cycle and calendar life. The knowledge of safety aspects on aged Li-ion cells is scarce. This project increases the understanding of the safety of large Li-ion battery cells aged at both freezing conditions and high temperatures.
The fire properties of both cells and modules will be also investigated. New safety tests of aged Li-ion cells have confirmed results previously obtained in the SafeLiLife-project, where cells cycled at lower temperatures (5 °C) and high currents can have a more unstable safety than cells aged and cycled and higher temperatures. This work is now continued with safety tests on even larger commercial Li-ion cells. Measurements of fire energy have been performed of Li-ion cells at various states-of-charge.
Advanced ageing tests of large Li-ion cells are performed, and complex battery data is collected at several specific ageing conditions. These conditions encompass various temperatures, currents, voltage ranges and state-of-charge. These data will be used to diagnose the ageing characteristics. Based on the ageing data, mathematical models is developed to increase the knowledge of the battery, battery lifetime and the temperature development within the batteries.
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The electrification and hybridization of ships with Li-ion batteries has gained momentum becoming an important new business area for several industries in Norway. There is a large potential of reduction in energy consumption and emissions of CO2, NOx and particulate matters through electrification. The largest battery system for a ship currently built stores several MWh of electric energy. The consequences of a fire in such a system can be catastrophic. The degradation and ageing of Li-ion batteries will in many cases contribute to reduced thermal stability. This can potentially affect the safety performance of the batteries.
This project relates to building in-depth knowledge for safety aspects of new and aged Li-ion batteries. The batteries are intended for use in maritime applications with a strong requirement for long cycle and calendar life. The knowledge of safety aspects on aged Li-ion cells is scarce. This project will increase the understanding of the safety of large Li-ion battery cells aged at both freezing conditions and high temperatures. The fire properties of both cells and modules will be also investigated. Based on collected battery data, mathematical models will be developed to understand battery life and battery temperature.