Excursion to Tesvolt in Wittenberg and FEV eDLP in Bitterfeld
On December 12, 2025, a group of students and employees from LENA went on an excursion to two interesting locations in the field of battery technology: Tesvolt in Lutherstadt Wittenberg and the FEV eDLP test center in Bitterfeld-Wolfen.
Tesvolt – Energy storage systems for industry and commerce
The first item on the excursion agenda took us to Tesvolt in Wittenberg. The aim of the visit was to experience the lecture on battery storage systems, which usually takes place at OVGU as part of the “Regenerative Elektroenergiequellen” course, directly at the company's premises this time, thus combining theoretical content with practical insights.
We began with an introduction to the company, which explained Tesvolt's development from a young start-up to an established manufacturer of large-scale battery storage systems. Continuous growth ultimately made it necessary to expand the site, which is why the program included a tour of the newly built, modern factory hall. During the tour, we gained insights into the design and production process of battery storage solutions as well as the special requirements for a production site for battery systems.
The event concluded with a technical presentation by Dr. Victor Schäfer, in which key technical aspects of battery storage technology were explored in depth. The close proximity to practical applications sparked a lively discussion, with numerous questions from the student group being addressed. The intensive exchange between industry experts and students contributed significantly to deepening the content and enhancing the lecture beyond the traditional lecture hall setting.
FEV eDLP – Battery testing and certification
We then drove on to the FEV eDLP test center in Bitterfeld-Wolfen, a modern development and testing center for high-voltage batteries. After a brief introduction, we were given an insight into the wide range of test procedures used for battery certification. These include electrical, thermal, and mechanical tests, which are necessary to ensure that batteries can be certified as safe and compliant with standards for use in electric vehicles.
Particularly impressive were the test bunkers used for abuse tests, in which destructive tests such as overcharging, short-circuiting, and temperature tests are carried out to analyze the behavior of batteries under extreme conditions.
Conclusion
The excursion provided an excellent insight into two different but closely related areas of battery and energy storage technology: from the series production and application of energy storage systems to the testing and certification of high-voltage batteries. The informative tours and technical presentations ideally complemented the course content and provided a better understanding of the technical, economic, and normative aspects of modern battery solutions.