The new stationary energy storage system (ESS) that supplies power to the Porsche plant in Leipzig covers an area nearly as big as two basketball courts and is made up of 4,400 end-of-service-life Taycan batteries salvaged from pre-series and works vehicles.
The system has a total energy capacity of 10 MWh, and can deliver up to 5 MW of power. It can be operated at up to 20% overload for short periods and is designed for a useful life of more than 10 years. Each of the four battery strings is connected to an inverter and a transformer in a medium-voltage system, allowing individual battery modules to be replaced if necessary. The electricity for the system, which is designed to help reduce peak loads, is generated in part by the plant’s solar power system, which has a peak output of 9.4 MW.
The system’s second life concept originated in Porsche’s Environmental and Energy Management unit, and the project, which was based on a feasibility study in collaboration with the University of Applied Sciences Zwickau, was initiated by Alwin Schmid, Head of Electrical Engineering at Porsche. In explaining the goals of the project, Schmid remarked, “Of course, this is about environmental aspects and the core issue of the energy supply. But it was also important to us to take a pioneering role with the storage system.”
Source: Porsche
