The battery is the key technology for future electric propulsion and its properties in use affect the characteristics of the electric vehicle and thus the acceptance of customers. Important properties are e. g.: range, cost, aging, fast charge capability, and maximum power as a function of temperature or state of charge. The modeling and simulation of electrochemical storage systems and especially the interfaces between the vehicle and the battery is of great importance in the planning phase of electric vehicles. Through the coupling of mathematical models describing the properties of battery systems with models describing the vehicle and application profiles, valuable information for the operating strategies of future battery-electric vehicles can be generated. The simulation models presented here simulate an electric vehicle with a special focus on the battery and its interfaces to the interacting vehicle components. The battery model is a lumped thermal-electrical model of a Lithium-ion battery, whereas the cooling circuit is a thermo-fluid simulation. The simulation structure is a particular challenge, since the models were created in different software environments: Matlab/Simulink for the battery and vehicle model and Flowmaster for the cooling circuit. With this model it is possible to analyze different operating and cooling strategies and their effects on to the vehicle range and the passenger comfort. Furthermore, the sensitivity of each parameter of the battery model on important vehicle attributes, such as range and speed, are investigated. Thus the basis of the total energy budget of the simulation can be optimized. For the simulation of typical driving scenarios standard drive cycles as the New European Drive Cycle were simulated.
Dynamic simulation of high voltage traction battery
2012
15 Seiten, 11 Bilder, 6 Quellen
Conference paper
Storage medium
English
Dynamic simulation of high voltage traction battery
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