Energy Storage Systems


Battery Storage Systems

  • Determination of open circuit voltage via thermo-dynamic equations
  • Kinetics of batteries: ohmic resistances, butler-volmer equation, diffusion
  • Basic concepts of battery storage systems technology
  • Lithium-ion batteries, lead-acid batteries and supercaps technology in detail: basic electrochemical setup and used materials, safety of different materials, electrical properties, current- and temperature dependencies, typical aging processes, charging and discharging behavior, deduction of appropriate battery management strategies, necessary components of battery management systems
  • System technical elements of battery packs: Design of chargers and charging method, Cell balancing systems, Thermal management, Modeling approaches, Basic algorithms for battery diagnostics, Protection of battery packs, Total integration of battery cells in battery packs
  • Approaches to accelerated lifetime tests
  • Training of presentation techniques

For further information on the lecture: RWTH Online


Seminar "Batteries, Storage Systems, Fuel Cells and Power Generators" - Focus: Energy Storage Systems

This course is designed to sharpen the technical presentation skills of Masters Students. Each student selects a topic from a provided list. From this topic, the student develops a power point presentation and gives a practice talk to an assigned advisor. The advisor gives pointers regarding slide construction, speaking style, posture, etc. The student will then give a formal presentation in class and receive feedback from the professor and his classmates. A three page technical paper is also written on the topic. Feedback is provided by advisors for the paper.

For further information on the seminar: RWTH Online



  • Common areas of application for electrical and thermal energy storage systems: portable devices, consumer electronics, industrial processes, solar power plants, energy grids, vehicles, etc.
  • Thermal high- and low-temperature storage systems
  • Mechanical energy storage systems for electrical energy: flywheel, pumped storage, compressed air storage
  • Electrical storages: Coils and SuperCaps
  • Electrochemical storage systems for electrical energy: basic chemical reactions, electrical properties, aging, applications, storage systems
  • Primary batteries of different technologies
  • Rechargeable electrochemical energy storages: lead-acid batteries, lithium-ion batteries, NiCd/NiMH, NaS/NaNICl, redox-flow batteries, hydrogen storage systems
  • Economical evaluation for different applications
  • Classification of storage technologies and alternative reserve control technology

For all of the storage technologies, technical structure, electrical and thermal properties, safety issues, possibility of recycling and requirements for the overall storage system are discussed. Whenever necessary, possible issues regarding the availability of the materials are evaluated.

As a homework, the students develop a suitable concept for a given application. Besides choosing and dimensioning the storage technology, system topics, economic topics, possible social conflicts and technological development possibilities are analyzed and elaborated.

For further information on the lecture: RWTH Online


Ringvorlesung Elektrische Energie aus regenerativen Quellen

Content: - Energy demand and supply, Global problems of energy supplying - Potentional renewable energy sources - Cost accounting - Photovoltaik: physical basics, manufactoring process,systemtechnic - Wind power - Water power - Other renewable sources: solarthermal, biomass, geothermal etc. - Integration of renewable sources in electrical supplying - Development level and prospects.

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Ringvorlesung Geschäftsstelle Elektromobilität

The lecture “Ringvorlesung Elektromobilität” consist of weekly presentations by guests from different Institutes and companies. They will shed light on aspects of e-mobility from their academic or their company’s perspective. This way interested students can join and get into dialogue with the guests and lecturers. There is no need to register for this lecture as there are no credits to be earned. The language of these presentations is german but many slides will be english.

For further information on this lecture: RWTH Online


Fundamentals of Electrical Engineering 1 - Introduction to Circuit Analysis

Further informationen on the lecture: RWTH Online