ISEA – RWTH Aachen

The RWTH Aachen University is one of the top technical universities in Europe: With a population of more than 35,000 students, 480 professors, 9 faculties in wide range of academic subjects. The Institute for Power Electronics and Electrical Drives (ISEA) has an extensive experience, for more than 40 years in the following research areas: Power Electronics, Electronic Devices, Electrical Drives and Electrochemical Energy Storage Systems. Besides public funded/supported research projects, ISEA focuses on research and development activities in close cooperation with national and international companies within the already mentioned application and research areas. Within the ISEA, the Professorship and Research Group “Electrochemical Energy Storage Systems” (Prof. Sauer) with its approximately 55 scientists (approx. 100 total staff) is now the largest non-industrial group in Germany working entirely on battery system technologies. This includes testing, analysis and modelling of electrochemical storage systems in respect to their electrical, thermal and aging behaviour. In addition, the analysis of storage systems in grid-related applications (small to large scale) and the assessment versus different non-electrochemical storage systems as well as other flexibility options which are addressed on the basis of thorough understanding of the batteries’ lifetime characteristics. ISEA’s main expertise lays on modelling and simulation of hybrid configurations by accounting for different battery technologies covering the electric, thermal and aging behaviour as well as power generator models (PV / wind), with the main goal being the optimum system setup in respect to diverse objectives.



Contact Person
Name: Sebastian Zurmühlen
Email address: This email address is being protected from spambots. You need JavaScript enabled to view it.
Postal address: Institute for Power Electronics and Electrical Drives, Hüttenstr. 5, D-52068, Aachen, Germany
Telephone number: 0049 241 80 49368



Research projects carried out by ISEA

  • ESPEN: Analysis of the potential role of battery storage systems for stabilization and safety of the future power supply system
  • SOLION: Development and field test of a PV battery system including battery aging tests, aging modelling and evaluation of optimum operating strategies
  • M5BAT: Development, realization and operation of a modular 5 MW medium voltage grid connected battery storage consisting of 5 battery strings with different battery technologies (lead-acid, lithium ion, Sodium Nickel Chloride)
  • PV-Nutzen: Analysis of benefits of PV battery systems different stakeholders (system owner, grid operator) from national economic, business economic and socio economic perspectives
  • ePerformance: Development of new concepts for electrified vehicles. ISEA conducted intensive battery aging tests and modelling

Significant infrastructure

  • Battery Test Centre: The battery test centre operates approximately 600 fully automated test benches as well as 110 impedance spectroscopes and 170 temperature chambers and ovens for battery cell and pack characterization under defined temperature conditions are available in 24 separate laboratory units. All test benches are connected to a data acquisition system allowing storing all operating data on a database server for later analyses. With this equipment electrical characterization of cells up to full battery packs as well as large scale test matrices for aging tests can be realized.
  • Post-Mortem Laboratory: The post-mortem laboratory operates equipment for in-depth material surface and composition analyses including different microscopic, spectroscopic and other devices. In addition glove boxes are available in order to work under protective atmosphere.