Efficient, scalable battery storage systems

Circuit diagram with power sources, transformer and battery Copyright: © PGS E.ON ERC and ESS TUM dc-dc converter developed at PGS (left) and scope of the project (right)

The project EffSkalBatt aims to develop a future-oriented scalable stationary battery-storage system. The scalable system is to be built from "ultra-high voltage batteries" (800 V) from future electric vehicles or the electric bus sector. The project focuses on the criteria of efficiency optimization and the usability of new ("second-use") and used ("second-life") battery storage systems.

In the project, the framework conditions of various applications for stationary battery-storage systems (BESS) are first determined. Different system concepts will then be evaluated in terms of system efficiency and scalability.

In addition, a system technology concept will be developed that reduces the planning effort for future BESS and is compatible with new and used batteries through a modular design principle. The core of the research project is a holistic overall system simulation, which includes detailed models of the individual components. The partners in this research project are working together to further develop the individual components - battery pack, battery management system (BMS), thermal management system (TMS), housing and power electronics. To validate the results under real conditions, the elaborated concepts will then be tested on a built-up battery storage system. For this demonstrator, the prototype of a dc-dc converter (see photo) is being developed at PGS.

In this project, PGS is working together with TU Munich, AKASOL, AixControl, SmartPower and Stadtwerke München.

This research project is funded by the Federal Ministry for Economic Affairs and Energy (BMWi) (funding code 03ET6148) and supervised by the project management organisation Jülich.
The author is responsible for the content of this publication.