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storage systems

Electrical energy storage systems

Safe and reliable high-performance energy storage systems

The research group "Electrical Energy Storage Systems" is located at the Research Center for Energy Storage Technologies ( in Goslar in the research cluster System Integration. There is a close technical cooperation with the Institute of Electrical Power Engineering and Energy Systems.

The focus of the research group "Electrical energy storage systems" is the holistic research of different energy storage systems both in stationary and mobile applications. In this context, it is important to select and optimize storage systems for electrical energy on a wide variety of time and size scales for the respective application scenarios from a systemic point of view. The storages must operate in such a way that an optimum in terms of cost effectiveness, general effectiveness and stability of the energy supply system can be achieved.

Figure 1: Overview of different storage technologies with subdivision into short- and long-term storage systems.

The spectrum of the storages to be surveyed extends from relatively small powerful decentralized storage systems in the time domain of a few seconds for dynamic network stabilization and energy content of a few kilowatt hours to medium-sized storage with energy content in the megawatt hour range. The storage technologies include pure electrical storage such as double-layer capacitors and superconducting coils, mechanical storage systems such as flywheel mass and compressed air storage, and electrochemical storage and energy converters such as batteries and fuel cell / electrolysis units.

The Energy Storage System research group is currently focusing on the use of lithium-ion batteries, a key technology for e-mobility and stationary storage systems to ensure future dependability.

In e-mobility, the focus will be on charging methods and the fundamental scalability of investigations on laboratory cells, single cells, modules, and battery systems. The use of highly dynamic lithium-ion battery storages in combination with controlled inverters can help to ensure the necessary stability criteria in electrical energy supply networks in the future by ensuring the dynamic balance of energy production and energy demand. The basic understanding of the battery itself is constantly being broadened through the requirements of the various projects by corresponding model developments. As a result, general relationships can be established for future battery development.


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