A Fresh Approach to Battery Management Systems
On June 20, 18:00, as part of the European Nemo project, experts from Graz University of Technology, the Free University of Brussels, and several industrial partners unveiled a novel battery management system (BMS). This technology leverages electrochemical impedance spectroscopy (EIS) to uncover hidden damage and degradation in individual battery cells, boosting both safety and operational efficiency for electric vehicles. Traditional BMS systems only monitor voltage, current, and temperature, but this new solution goes much deeper.
To train the system, engineers deliberately damaged batteries in the lab, simulating mechanical deformations from things like a bad parking job or minor collisions. By using EIS to measure the internal electrical resistance of cells, the TU Graz team built a physics-based mathematical model that predicts volume changes in each cell during charge and discharge cycles.
Models and Prototypes
Researchers at the Free University of Brussels created models that track wear dynamics and capacity fade for every battery. A working prototype has already been developed at the single battery module level. The next project phase is adapting this technology for mass industrial production.
“The battery management system is a critical tool for the safe and environmentally friendly operation of electric vehicles.”
Christoph Dreessen
According to Dreessen, the new system models not only improve safety metrics but also deliver richer insights into internal battery changes: “Before, a test would only give you dry numbers—like how much capacity had dropped. The new models, however, show what’s happening inside the cells as they age. This allows us to adjust battery operating modes in time, positively impacting performance, lifespan, and safety.”
This BMS innovation marks a key step forward in making electric vehicles safer and more efficient as they gain market traction. Integrating electrochemical impedance spectroscopy could reduce battery-related risks and extend service life. The project may also spark further breakthroughs in EV and battery technology, accelerating the shift toward greener transportation.
As advancements in battery technology continue, researchers have also developed a new safer battery that reportedly lasts eight times longer than conventional models. This innovation not only enhances the longevity of electric vehicles but also aligns with the growing emphasis on safety and sustainability in battery management, complementing the recent breakthroughs in damage detection technology.