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TY  - THES
AU  - Koltermann, Lucas
TI  - Analyse und Optimierung der Zuverlässigkeit und Effizienz von hybriden Batteriespeichern am Beispiel von M5BAT
VL  - 194
PB  - Rheinisch-Westfälische Technische Hochschule Aachen
VL  - Dissertation
CY  - Aachen
M1  - RWTH-2025-06200
T2  - Aachener Beiträge des ISEA
SP  - 1 Online-Ressource : Illustrationen
PY  - 2025
N1  - Veröffentlicht auf dem Publikationsserver der RWTH Aachen University
N1  - Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2025
AB  - The energy transition in Germany aims to enable a CO2-neutral future. In the field of electrical energy supply, the energy transition requires a shift away from fossil fuel power plants and an expansion of renewable energy such as wind and photovoltaic power plants. The volatile generation characteristics of renewable energies make short-term and long-term storage necessary in the energy system, with battery storage taking the place of short-term storage. This dissertation presents the analysis from the operation of the M5BAT large-scale battery storage system, which has been operated by RWTH Aachen University since 2016. With around 6 MW / 7.5 MWh and the hybrid design with ten battery units and five different battery technologies, M5BAT is unique in the research landscape. This allows the battery technologies used to be compared with each other and technology-specific advantages to be exploited. Research questions and theses are formulated on the topics of status analysis, reaction speed, efficiency and energy management and are answered by investigations on the M5BAT large-scale battery storage system. As part of the status analysis, the operational battery availability, the causes of failure and the degree of capacity utilization were determined. It became clear that the predominant failure times were caused by the respective battery management system or the violation of voltage limits. In case of lithium-ion batteries of the lithium-iron-phosphate battery unit of the M5BAT large-scale battery storage system, balancing is responsible for about 25 
LB  - PUB:(DE-HGF)11 ; PUB:(DE-HGF)3
DO  - DOI:10.18154/RWTH-2025-06200
UR  - https://publications.rwth-aachen.de/record/1015017
ER  -