The BATTwin project partners have gathered in Grenoble for an insightful and intensive two-day meeting on March 27th and 28th, 2025.

Hosted by Schneider Electric, the meeting allowed an overview of the performed work in the previous months. As such the process and system-level digital twins development, the impact assessment of the proposed solution and communication and exploitation steps have been discussed. In addition, workshops have been organised on specific aspects of data modelling and the design of process-level and system-level digital twins.

In the frame of the Battery 2030+ Roadmap Workshop, held in Ulm, Germany, on the 19th of March 2025, Andreas Rauh presented the goals and the current status of BATTwin. 

During this presentation a special attention was given to the development of process-level and system-level digital twins as well as to strategies for the quantification of uncertainty and model reliability.

On the 3rd of February, a groHeorizon Europeup of international collaborators of the EU Horizon project BATTwin (Flexible and scalable digital-twin platform for enhanced production efficiency and yield in battery cell production lines) involving Politecnico di Milano (Italy), the Research Laboratory on Engineerinsensg & Management Intelligence, SZTAKI (Hungary), Sivas University (Turkey), Verkor (France), and Carl von Ossietzky Universität Oldenburg (Germany) met in person in Oldenburg to discuss recent advancements on the development of process-level digital twins for battery cell production. The key aspects of the meeting were the formalization and further development of the different submodels throughout the production chain from raw material mixing to formation and aging. Especially, the formalization of the modeling procedure will be an essential building block to allow for an interconnection of the models for different stages of the cell production in a unified framework which should not only address nominal operation of the manufacturing process but also detect reasons for scrap, give indicators for process optimization, and quantify the quality of the developed models and their forecasts by means of uncertainty modeling and sensitivity analysis.

The group of participants identified routes for further developments within BATTwin and exchanged the outcomes in a hybrid discussion format with those consortium partners who could not be present in Oldenburg. Lastly, the workshop identified possible further collaborations within the project that aim at the development of system-level digital twins as well as the design and optimization of feedforward and feedback control approaches.
 

As part of the Energy Campus organized by the Energy and Climate Protection Foundation as an ideas competition for young scientists, the ongoing doctoral project of Ms. Marit Lahme was awarded 3rd place. 

As part of her research, Ms. Lahme is working on the Interval-Based Identification of the Open-Circuit Voltage Characteristic of Battery Cells with the aim of detecting ageing. Batteries have become indispensable in modern consumer and communication electronics as well as in the transportation and energy sectors. As part of her PhD project, Ms. Lahme is developing a novel method that makes it possible to determine the ageing effects of battery cells during normal operation without the need for predetermined testing signals. This method is based on the online estimation of the open-circuit voltage characteristic, which can be used as an alternative to electrochemical impedance spectroscopy. The open-circuit voltage characteristic of a battery cell describes the dependence of the open-circuit voltage on the state of charge. Knowing this characteristic is the basis for safe and life-extending operation. This characteristic curve is a non-linear function and is influenced by various factors, such as ageing effects or the temperature of the battery cell. Based on the identified open-circuit voltage characteristic and possibly the internal resistance, conclusions can be drawn about variations caused by external influence factors. As part of this work, a highly innovative online method is being developed that makes it possible to identify characteristics such as the open-circuit voltage curve of lithium-ion batteries during operation in order to approximate the dynamic behavior of the battery cell.  In addition to the methodical derivation of novel estimation procedures, Ms. Lahme is working intensively on the experimental validation of her results on test benches available at the research group Distributed Control in Interconnected Systems.

We cordially congratulate Marit on this outstanding recognition of her research, which has already gained international visibility through several conference and journal publications!

Andreas Rauh has been nominated for the award of the University Society Oldenburg for outstanding PhD supervision.

We are extremely happy, that 5 of the 7 nominees of this year's awarding ceremony are members of the School for Computing Science, Business Administration, Economics and Law (Volker Boehme-Nessler, Christian Busse, Jörn Hoppmann, Andreas Rauh, Jürgen Sauer).

Congratulations especially also to our colleague Jörn Hoppmann (Head of the Management Research Group) for receiving this year's award.

The BATTwin consortium gathered in Budapest on the 7th and 8th of November for an insightful two-day meeting hosted by HUN-REN SZTAKI. During the meeting, the impactful work done over the past five months was reviewed, and the next steps were discussed.

The event featured hands-on workshops and visits to SZTAKI’s cutting-edge labs, diving deeper into the tech shaping the future of digital twins.

On the 14th of August 2024, Andreas Rauh started the series of inaugural lectures of the Department of Computing Science with his presentation „Control Engineering: Magic, Art, or Craft” („Regelungstechnik: Magie, Kunst oder Handwerk?”).

On June 18, 2024, Friederike Bruns successfully defended her dissertation "Systematic Correct-by-Construction Design for Industrial Real-Time Communication" at the Department of Computing Science of the Carl von Ossietzky Universität Oldenburg. We congratulate Friederike on this outstanding achievement!

The BATTwin Project held a two-day meeting on the 30-31 May 2024, in Paris, France. The M6 meeting was co-organised by HESAM Université, ENSAM and CNAM. Project partners discuss the progress of their work in the project and plans for their future work.

On the second day of the meeting, the partners had the opportunity to visit CNAM labs and experience the Digital Twin in virtual reality for learning. They also had the chance to visit the well-known industrial design museum: Musée des Arts et Métiers

During the meeting of the European Battery Manufacturing Appliance Upcell, held at Politecnico di Milano from April 11-12, 2024, its scientific committee was created.

The members of this committee are (in alphabetic order):

• Prof. Corsin Battaglia (Head of Laboratory Materials for Energy Conversion, Empa - Swiss Federal Laboratories for Materials Science and Technology)
• Prof. Marcello Colledani (Technology and Production Systems Lab, Department of Mechanical Engineering, Politecnico di Milano, Italy)
• Prof. Tarek Raissi (Cédric Laboratory, Conservatoire national des arts et métiers - Cnam, Paris, France)
• Prof. Andreas Rauh (Carl von Ossietzky University Oldenburg and OFFIS e.V., Oldenburg, Germany)