Energy Storage Systems


Battery Storage Systems [en, WS]/[de, SS]

Energy storage is gaining importance in the areas of mobile communication devices, hybrid and eletric vehicles or for the storage of electrical energy in networks with a high proportion of renewable energies.

  • 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

Further information on the lecture: RWTHonline


Seminar "Batteries, Storage Systems, Fuel Cells and Power Generators" - Focus: Energy Storage Systems [de, WS]

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.

Further information on the seminar: RWTHonline


Energy Storage Technologies [de, WS]/[en, SS]

Students acquire a basic overview and an advanced understanding of different energy storage technologies and their applications.

  • 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.

Further information on the lecture: RWTHonline


Ringvorlesung Future Energy Systems (former Elektrische Energie aus regenerativen Quellen)

Future Energy System - Part 1: Power Generation from Renewable Energies [en,WS]

The lecture series Future Energy System Part 1 is offered jointly by the institutes ISEA, IAEW, IEM and ACS. The lecture describes the basics of today's and future power grids. It consists of the following 14 lectures.


  • Introduction: Energy supply today and tomorrow (ISEA-ESS, Prof. Sauer)
  • Distribution System Integration of Renewable Energy Sources (IAEW-AEV, Prof. Ulbig)
  • Market integration of renewable energy sources (IAEW-ÜEW, Prof. Moser)
  • Technology and control of wind turbines (IEM, Prof. Hameyer)
  • Fundamentals and technology of hydro power plants (IEM, Prof. Hameyer)
  • Transmission grid integration (IAEW-ÜEW, Prof. Moser)
  • Fundamentals of silicon photovoltaics (ISEA-ESS, Prof. Sauer)
  • Alternative photovoltaic concepts and photovoltaic systems (ISEA-ESS, Prof. Sauer)
  • Offshore and onshore wind farms (IAEW-EAH, M.Sc. Patrick Düllmann)
  • Automation in the power supply systems (ACS, Prof. Monti)
  • Energy storage technologies (ISEA-ESS, Prof. Sauer)
  • Power electronics for wind and photovoltaic power plants (ISEA-LE, Prof. DeDoncker)
  • Power electronics for flexible DC distribution grids (ISEA-LE, Prof. DeDoncker)
  • Power, heat, gas, and fuels from biomass (ISEA-ESS, Prof. Sauer)

Further information on the lecture: RWTHonline

Future Energy System - Part 2: Sector Coupling [en,SS]

The lecture series Future Energy System Part 2 is offered jointly by various institutes of RWTH Aachen University and external research institutes. The lecture describes the basics of today's and future power grids. This consists of the following 14 events.


  • Flexibilities and sector coupling in future energy system (ISEA, Prof. Sauer)
  • Introduction to solarthermal power plants (DLR, Prof. Pitz-Paal)
  • Energy infrastructures and geothermal systems (Fraunhofer IEG, Prof. Wagner/Prof. Strozyk)
  • Integrated Energy Infrastructures (IAEW, Prof. Ulbig)
  • Natural and synthetic gas systems (IAEW, Prof. Moser)
  • Hydrogen: a versatile tool for battling climate change (ISEA, Prof. Figgemeier)
  • The digital energy revolution (ACS, Prof. Monti)
  • Distributed intelligent systems (ACS, Prof. Ponci)
  • Energy demand and supply concepts in industrial processes and industrial parks (AVT, Dr. Bongartz)
  • Life-Cycle-Assessment (ESE, Prof. Praktiknjo)
  • Mobility (ISEA, Prof. Sauer)
  • Demand, generation, storage, and distribution of heat in buildings and districts (EBC, Prof. Müller)
  • Power-to-Fuel technologies (VKA, Prof. Pischinger)
  • New energy services, business models and energy policy challenges in a 4D world (FCN, Prof. Madlener)

Further information on the lecture: RWTHonline


Fundamentals of Electrical Engineering 1 - Introduction to Circuit Analysis [de, WS]

Further informationen on the lecture: RWTHonline


Industrial Product Development Process Using the Example of Battery Systems for Hybrid and Electric Vehicles [en, SS]

The lecture follows the product evolution process of a battery. The focus is mainly on real process and how the process is applied in the real world. The lecture follows the full life cycle of a battery. It includes a detailed discussion of the organizational and structural processes of an industrial development process, less the technical challenges. Even if the lecture focuses on battery development, an important goal is to understand this process as a basic procedure in the automotive industry.

Product concept: Customer Requirements Management, overall concept and key performance parameters (KPI’s), technical specification and agree- & disagree-process

Development: Process of product development, V-model for development, automotive SPICE, ISO 26262, monitoring shown on lithium-ion batteries as an example: performance, aging, cost and safety, what is a “BTV”?, testing of lithium-ion batteries: validation of concept, validation of design, functional testing, safety testing and lifecycle, what’s “A-, B-, C-, and D-Muster” and what do they have to fulfill?

Production planning and controlling: Design to cost, purchasing, tolerance management, production process, planning of manufacturing plants, spots and workers, construction of entire production lines, requirements for the location, process-“FMEA”

Series launch: Test bench technology, Assurance of quality, start of a production line, training of workers

Series controlling: Quality- and supplier management, failure analysis, field experience – how is the product used? Were the concepts correct?

Lecture: September 14th to September 17th, 2020
Exam: September 18th and september 21th, 2020

The lecture is held by Dr. Wilstermann. For information on the lecturer can be found here: Link

Further information on the lecture: RWTH Online