10.11.2025

Source: E & M powernews

A team at TU Braunschweig is working on a measuring system that will precisely monitor the state of charge and ageing of lithium-ion batteries.

Battery storage systems are becoming increasingly important for the energy transition. They compensate for fluctuations, store electricity from wind and solar power plants and thus ensure grid stability. The founding team led by Thorben Schobre, Sheikh Mustafa Mumtaz and Lukas Radomsky wants to use their solution to help operate energy storage systems more efficiently and extend their service life.

The spin-off "Doyam" from the Technical University of Braunschweig is working on a technology that determines the charging and ageing status of battery storage systems during operation. With funding of around 1 million euros from the Federal Ministry for Economic Affairs and Energy, the team aims to bring its process to market maturity. The founding team led by Thorben Schobre, Sheikh Mustafa Mumtaz and Lukas Radomsky wants to use its solution to help operate lithium-ion batteries more efficiently and extend their service life.

The process combines electrochemical impedance spectroscopy, which measures the alternating current resistance, with machine learning methods. This should make it possible to precisely determine the condition of individual battery cells, according to the Braunschweig-based company. Combined with modular, power-electronic converters, the technology can also be transferred to large cell clusters in stationary storage systems, as the scientists explain.

According to the university, the combination of measurement technology and data analysis should help to reduce operating costs and maintenance costs. At the same time, it enables a longer service life and greater safety for the storage units. According to the founding team, they have many years of experience in power electronics and battery technology. They are using the laboratories of the Institute for Electrical Machines, Drives and Railways at TU Braunschweig to further develop the prototype.

Promoting science to the market

The project is being supported by Professor Regine Mallwitz as mentor, Professor Markus Henke and the university's transfer service. The aim is to transform the technology into a product ready for series production and to develop a viable business plan.

With their project, the founders want to increase the efficiency of battery storage systems and also underpin the competitiveness of German battery technology in the long term. TU Braunschweig sees this as an example of how university research can contribute to concrete solutions for the energy transition.

Author: Davina Spohn