Energy Storage Systems

 

Battery Storage Systems

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

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

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

 

Lecture Series Electrical Energy from Regenerative Sources

Content:

  • Energy demand and supply, Global problems of energy supplying
  • Potentional renewable energy sources
  • Cost accounting
  • Photovoltaics: Physical basics, manufactoring process, system technology
  • Wind power
  • Water power
  • Other renewable sources: Solarthermal, biomass, geothermal etc.
  • Integration of renewable sources in electrical supplying
  • Development level and prospects

Further information on the lecture: RWTHonline

 

Lecture Series Office Electromobility

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 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 presented in English.

Further information on the lecture: RWTHonline

 

Fundamentals of Electrical Engineering 1 - Introduction to Circuit Analysis

Further informationen on the lecture: RWTHonline

 

Industrial Product Development Process Using the Example of Battery Systems for Hybrid and Electric Vehicles

The lecture follows the design process of a battery. The focus is mainly on organizational and structural processes of an industrial development process, less on technical challenges. The process from concept to production shall be shown and the main topics are examined. 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: Requirements, 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, education of workers

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

Further information on the lecture: RWTH Online