"How to build light battery packs for high power applications" – TWT at DeciElec 2021


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Picture: LiBAT demonstration in Garching. The LiBAT battery powers an electric motor with propeller attached. Powers of up to 3,25kW with currents up to 30 A peak value have been achieved at 2860 rpm in the tests. Photo credit: Wade Million

TWT GmbH, Dassault Aviation and LionSmart GmbH present the results of the LiBAT research project on the DeciElec Business convention

On September 23rd, Dr. Jan Dahlhaus from TWT GmbH will present the results of the EU-funded CleanSky 2 research project LiBAT in a joint talk with Jean-Marc le Peuvedic from Dassault Aviation and Julia Eckhardt from LION Smart GmbH on the DeciElec Business convention in Toulouse.

When we talk about the need for cleaner transport – be it in the air, on the street or anywhere else – electrified mobility is currently in the focus. But state-of-the-art batteries are still relatively heavy, posing a serious obstacle for the breakthrough of electrically propelled aviation.This is where the EU-funded Clean Sky 2 project LiBAT takes off.

In autumn 2020, the LiBAT consortium has successfully tested its highly innovative AC battery system, demonstrating a power performance that is sufficient to maintain level flight for a manned glider. The advanced LiBAT technology can be applied to a broad range of applications in the transport sectors, taking us a large step towards a more sustainable future. 

The potentially game-changing LiBAT battery system solution addresses the weight problem by an extraordinary level of integration and a combination of advanced technologies. By integrating multi-level-inverter technology into the battery, the LiBAT team created a unique, tuneable AC battery system that eliminates the need for additional charging or motoring power electronics and saves extra weight. Combined with a powerful immersive thermal management and a suitable cell choice, both excellent energy and power performance are realized, given the low weight and volume of the pack. The modular design guarantees a scalable system and meets the ambitious projects targets.

The research was conducted by the German companies TWT GmbH and LION Smart GmbH within the Clean Sky 2 program, funded by the European Union through the Horizon 2020 initiative. Project coordinator TWT GmbH specializes on innovative development services across various industries and will bring LiBAT insights to its customers. The company’s engineering team contributed to the design and verification, and performed electrothermal system simulations in an early stage to predict performance and improve the design. TWT’s in-depth simulation expertise pushed the project progress early and provided a profound insight into the dynamics of the LiBAT battery. LION Smart GmbH is an engineering company that specializes in research and development of innovative battery solutions in the field of e-mobility. The company’s team was pivotal in system design, prototyping and testing of the battery pack. 

Applications for the LiBAT battery can be found in many fields, especially for electric air taxis, hybrid propulsion systems, flexible frequency auxiliary networks, electric and hybrid cars, as well as power tools. It is very suitable for electrified gliders, which were the focus of this research project.

You would like to learn more about this topic? Visit us at DeciElec 2021!