Abstract

The application of stationary battery storage systems in distribution grids can serve different purposes. Especially in grid areas with a high photovoltaic penetration, storage systems can increase the level of self-sufficiency for consumers using privately owned photovoltaic systems as well as offload the grid in times of high photovoltaic generation in order to reduce necessary grid reinforcement. A further application scenario is provision of control power for stabilizing the grid frequency. Storage systems can fulfill single individual abovementioned tasks as well as a combination of several ones, which may result in a variety of different load curves for the storage system. As the aging behavior of the battery cells is strongly influenced by load profiles, the storage application will severely influence lifetime of storage systems. In order to investigate the aging behavior dependent on the application mode, the load curves resulting from the different applications given above are raised for a battery aging simulation. This study presents aging behavior for lithium-ion cells with NMC technology. As a result, the deterioration rate of this cell type is determined dependent on the different application modes. On the basis of these outcomes, conclusions regarding the aging behavior for the different applications are drawn.

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