Highlights of the Business Unit Energy

Novel, powerful electrical storage: Redox flow battery

Powerful energy storage systems can compensate for fluctuations in renewable energies and ensure a constant supply of electricity. Fraunhofer UMSICHT has developed a redox flow battery with a cell size of 0.5 m2 that features a stack output of 25 kW in total. The next objective is the development of a 2 m2 sized stack with an output of 100 kW. In the in-house battery test laboratory, new applications for lithium-ion batteries are being tested in addition. In the future they could not only be used in cellular phones or notebooks but also as battery packs in electric vehicles or in other stationary applications.

More info (German)  battery-lab.umsicht.fraunhofer.de

Dr. rer. nat. Jens Burfeind | Phone +49 208 8598-1268 | jens.burfeind@umsicht.fraunhofer.de  

The city as storage

Efficiently adjusting existing decentralized storage systems and thus minimizing the expansion of new grids for an energy system of the future – that is the objective Fraunhofer UMSICHT pursues with the project "The hybrid urban energy storage". Cities as virtual storage feature an enormous potential to store energy and to balance energy supply and demand for the generation of electricity and heat. An essential advantage is that a lot of systems such as heat pumps or CHPs already have been installed. Fraunhofer UMSICHT develops technologies relevant to an optimized storage and load balancing, assesses them systematically and perfects them.

More info (German)  www.hybrider-stadtspeicher.de

Dipl.-Ing. Carsten Beier | Phone +49 208 8598-1416 | carsten.beier@umsicht.fraunhofer.de

Cooling buildings, processes or batteries with phase change slurries

Phase change slurries are suitable for the storage of heat and cold. Fraunhofer UMSICHT researches their areas of application and has developed a dispersion made of water and paraffin that is suitable for the cooling of car batteries, miscellaneous processes or even buildings: CryoSol®Plus. When the dispersion absorbs heat, the solid tiny paraffin balls melt into paraffin droplets and store the heat. Once the solution cools down, the droplets become solid again. In a temperature range from 5 to 20 degrees Celsius, CryoSol®Plus is a good alternative to cold water, since it features a two to three times higher energy density.

Dr.-Ing. Clemens Pollerberg | Phone +49 208 8598-1418 | clemens.pollerberg@umsicht.fraunhofer.de

Further Information

The areas with their departments and groups comprise the scientific know-how of the Institute by expertise criteria.