Lithium-ion batteries for storage of renewable energies and electric grid backup

Power supply systems based mainly on renewable energy sources like solar and wind require storages on different time scales, (1) from seconds to minutes, (2) from minutes to hours and (3) from hours to months. Batteries and in particular several lithium-ion technologies can fulfill a wide range of these tasks, as they can be designed in a modular way, be installed next to decentralized generators like residential photovoltaic (PV) systems, next to the consumers to reduce the peak demand or as quarter-storages in distribution grids to match the locally produced PV power with the local consumption. Within this chapter, such solutions for decentralized PV battery systems and results of simulation studies are presented.