Test system for diagnosing energy storage devices (such as e-bike batteries) to support the mobility transition

Using electrochemical impedance spectroscopy (EIS), we are developing an innovative method for monitoring energy storage systems. This methodology enables us to determine the condition of batteries more accurately and thereby extend their service life. The further development of this into distributed impedance spectroscopy (DEIS) is particularly promising, as it enables the monitoring of large battery systems whilst they are in operation

Our method makes it possible to monitor the condition of every single battery cell in large storage systems. In tests on stationary battery storage systems, we were able to demonstrate that this technology works accurately. A particular advantage is that we can precisely measure and monitor the temperature distribution throughout the entire battery system – an important factor for the safety and longevity of the storage systems.

In our laboratory, we have developed a compact test system that combines a battery, battery management and power electronics. This flexible platform enables us to test new monitoring methods for a wide range of applications – from e-bikes to stationary energy storage systems

You can find more information about the project on the project page