ReserveBatt

The operation of high-power batteries, for example used as operating reserve for the stabilization of the electric grid, generates both significant heat and strong magnetic fields due to high flows of power. Consequently, this risk of hazard should not be underestimated and is addressed in the R&D project “ReserveBatt”. For Fraunhofer HHI, the scope of the project is to detect at an early stage possible upcoming hazards from high-power batteries by applying fiber optical sensor technology: The fiber-optical and magneto-optical sensors integrated into the system are to monitor the actual status of the battery. Thereby, the measurement parameters temperature, strain, and electrical current can be observed. For manufacturing the sensors, Fraunhofer HHI’s fiber Bragg grating processing method based on femtosecond laser technology is applied. Finally, the developed sensors are integrated within the battery system. Critical conditions are to be recognized in a precise manner and to be reported to a master system. In addition to the risk assessment, cellular and modular behaviors are studied