Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Innovations in thermal and electric storage systems: Fraunhofer ISE at the Energy Storage Europe


In Düsseldorf, eight member institutes of the Fraunhofer Energy Alliance are presenting their range of services from March 12-14, 2019 at the Energy Storage Europe, the leading international trade fair on energy storage. The Fraunhofer Institute for Solar Energy Systems ISE is exhibiting its innovations in the areas of electrochemical and thermal energy storage, power electronics and Power-to-Hydrogen at the joint booth (H33, located in Hall 8b).

In parallel, the 8th Energy Storage Europe Conference (ESE) and the 13th International Renewable Energy Storage Conference (IRES) is taking place, where Fraunhofer ISE researchers will present results in the fields of electrical and thermal energy storage.

The SiC inverter, developed at Fraunhofer ISE, is both highly efficient and particularly compact.

© Fraunhofer ISE

The battery stack can be used for different stationary applications.

© Fraunhofer ISE/Photo: Dirk Mahler

Silicon-Carbide Synchronous Converter 25 kW

In the collaborative research project “OptiStore”, Fraunhofer ISE develops a highly efficient bidirectional converter with a maximum power of 25 kW.

The objective is to develop and test an innovative power self-consumption system based on a modular converter lithium-ion battery unit for optimum use of renewable energy sources in the commercial and industrial sectors.

The investment and operation costs of the entire system shall be cost-optimized yet at the same time have an efficiency greater than the typical systems found on the market today.

These contrary goals can only be reached with the newest silicon-carbide MOSFETs and an innovative design.

Thanks to a frequency of 96 Hz, the passive components can be designed smaller than usual, yet at the same time a very good efficiency of up to 99 % can be achieved.

Three-Phase SiC-UPS Inverter

The highly compact inverter developed at Fraunhofer ISE for the uninterruptible power supply (UPS) reached efficiencies of up to 98.7 %. By using silicon carbide transistors, 10 kW power at a volume of only 5 liters could be realized.

The efficiency is particularly important for online UPS systems, since short voltage interruptions in the grid must be compensated while at the same time the consumer must be permanently supplied via the USP. These results can be transferred to other areas in power conversion where weight and efficiency play a large role.

Battery Stack for Stationary Applications

The prototype shown here is based on an aqueous cell chemistry and acts as a battery storage device for stationary applications. The device is inherently safe and in accordance with the objective (i.e. non-mobile applications) has not been optimized with respect to energy density but rather with respect to the lowest total cost of ownership (TCO).

Therefore, the sustainable and inexpensive materials were used for the manufacture. With its flexible architecture, the unit can be adapted to meet special requirements (e.g. high power). Fraunhofer ISE provides services in designing, constructing, testing and certifying electrochemical storage devices.

Sector Coupling with Hydrogen

The exhibit shows the possibilities of sector coupling with hydrogen. With its on-site solar hydrogen filling station and hydrogen feed-in plant, Fraunhofer ISE has two examples of the manifold possibilities for using hydrogen in the energy system. With the help of a PEM electrolyzer, electricity is used to split water and produce hydrogen, which is then stored in pressurized tanks or discharged directly into the respective sectors.

The hydrogen feed-in plant supplies the gas network with renewable gas. Fraunhofer ISE uses both platforms as research platforms to test new components for hydrogen and natural gas applications as well as to test new operating modes of electrolysis, refueling stations and feed-in plants.

The Department of Chemical Energy Storage at Fraunhofer ISE offers customers the opportunity to test their product developments in the practice on Fraunhofer ISE’s hydrogen plants. In addition, Fraunhofer ISE has many years of experience with the in-house developed simulation toolbox "H2ProSim", which provides the key competence for the design and evaluation of complex hydrogen systems.

Woven Wire Heat Exchanger for Latent Heat Storage

Protoypes of woven wire heat exchangers are exhibited for latent heat storage that use phase change materials as storage medium. For operation a heat transfer fluid flows through the capillary tubes. The heat exchanger is surrounded by phase change material, or PCM, which melts and crystallizes respectively storing and releasing heat. The low thermal conductivity of PCM limits the thermal power of the storage.

In the prototypes shown, the surface area is enlarged by a applying a metal fabric to compensate the low thermal conductivity. The heat exchangers consist of capillary tubes with a diameter of 2 mm and 100 µm wire fabric which is welded to the tubes. The actual configuration of the fabric leads to a heat transfer surface that has three times the area of the bare tubes. Compared to conventional structures like fin wires, woven wires save material and greatly increase the surface area.

Talks from Fraunhofer ISE Researchers at the IRES Conference and the ESE Forum:

12.03. 15:10 h: Christian Bischoff
»Wässrige Zink-Ionen-Technologie für stationäre Batteriespeicheranwendungen« (ESE Forum)

13.03. 9:00 h: Björn Nienborg
»Ecological life cycle assessment of thermal energy storage concepts for building applications« in »Thermal«

13.03. 11:20 h: Sebastian Gamisch
»Transient Behavior of the Thermal Management for Cylindrical Li-Ion-Batteries based on Phase Change Material Composite« in »Batteries«

13.03. 12:00 h: Christopher Voglstätter
»Energy Network Freiburg – Hydrogen Generation And Feed-in In The Context Of Municipal Distribution Grids« in »Applications, Case Studies, System Analysis«

13.03. 12:20 h: Nikolas Knetsch
»Techno-economic Assessment Of Different Design And Operation Concepts Of A Power To Hydrogen Plant Fed By A Photovoltaics Power Plant« in »Storage on the move«

Further Information:

Weitere Informationen:

Karin Schneider | Fraunhofer-Institut für Solare Energiesysteme ISE

More articles from Trade Fair News:

nachricht Modular OLED light strips
17.09.2019 | Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP

nachricht Deburring EXPO: Finishing sheet edges and functional surfaces with the laser
12.09.2019 | Fraunhofer-Institut für Lasertechnik ILT

All articles from Trade Fair News >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Happy hour for time-resolved crystallography

Researchers from the Department of Atomically Resolved Dynamics of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg, the University of Hamburg and the European Molecular Biology Laboratory (EMBL) outstation in the city have developed a new method to watch biomolecules at work. This method dramatically simplifies starting enzymatic reactions by mixing a cocktail of small amounts of liquids with protein crystals. Determination of the protein structures at different times after mixing can be assembled into a time-lapse sequence that shows the molecular foundations of biology.

The functions of biomolecules are determined by their motions and structural changes. Yet it is a formidable challenge to understand these dynamic motions.

Im Focus: Modular OLED light strips

At the International Symposium on Automotive Lighting 2019 (ISAL) in Darmstadt from September 23 to 25, 2019, the Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, a provider of research and development services in the field of organic electronics, will present OLED light strips of any length with additional functionalities for the first time at booth no. 37.

Almost everyone is familiar with light strips for interior design. LED strips are available by the metre in DIY stores around the corner and are just as often...

Im Focus: Tomorrow´s coolants of choice

Scientists assess the potential of magnetic-cooling materials

Later during this century, around 2060, a paradigm shift in global energy consumption is expected: we will spend more energy for cooling than for heating....

Im Focus: The working of a molecular string phone

Researchers from the Department of Atomically Resolved Dynamics of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg, the University of Potsdam (both in Germany) and the University of Toronto (Canada) have pieced together a detailed time-lapse movie revealing all the major steps during the catalytic cycle of an enzyme. Surprisingly, the communication between the protein units is accomplished via a water-network akin to a string telephone. This communication is aligned with a ‘breathing’ motion, that is the expansion and contraction of the protein.

This time-lapse sequence of structures reveals dynamic motions as a fundamental element in the molecular foundations of biology.

Im Focus: Milestones on the Way to the Nuclear Clock

Two research teams have succeeded simultaneously in measuring the long-sought Thorium nuclear transition, which enables extremely precise nuclear clocks. TU Wien (Vienna) is part of both teams.

If you want to build the most accurate clock in the world, you need something that "ticks" very fast and extremely precise. In an atomic clock, electrons are...

All Focus news of the innovation-report >>>



Industry & Economy
Event News

Society 5.0: putting humans at the heart of digitalisation

10.09.2019 | Event News

Interspeech 2019 conference: Alexa and Siri in Graz

04.09.2019 | Event News

AI for Laser Technology Conference: optimizing the use of lasers with artificial intelligence

29.08.2019 | Event News

Latest News

Stroke patients relearning how to walk with peculiar shoe

18.09.2019 | Innovative Products

Statistical inference to mimic the operating manner of highly-experienced crystallographer

18.09.2019 | Physics and Astronomy

Scientists' design discovery doubles conductivity of indium oxide transparent coatings

18.09.2019 | Materials Sciences

Science & Research
Overview of more VideoLinks >>>