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This contribution presents an analytical and a numerical model for predicting the effective thermal conductivity of porous electrode coatings as a function of microstructure parameters. Both models account for the morphological parameters and the thermal bulk materials of the constitutive cell components. The results of both models have been successfully verified against each other and validated with literature data as well as own experimental measurements.

Mechanical engineering & materials --- thermal conductivity --- thermal transport properties --- porous electrodes --- lithium-ion cell --- lithium-ion battery --- Wärmeleitfähigkeit --- thermische Transporteigenschaften --- poröse Elektroden --- Lithium-Ionen Zelle --- Lithium-Ionen Batterie

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The energy management of battery electric vehicle is important for maximum utilisation of the battery. This book elaborates the requirements of the energy management and defines them as mathematical optimization problem. Strategies for the development process based on dynamic programming and for driving operation based on Pontryagin’s maximum principle are presented to consider all significant influences.

Energiemanagement --- Lithium ion battery --- Optimierung --- Elektrofahrzeug --- Lithium-Ionen-Batterie --- Electric vehicle --- Energy management

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The model-aided cathode design for lithium ion batteries is presented, which enables a systematically minimization of loss processes and an increase of power and energy density. The cathode model is parametrized without values from literature by combining microstructure analysis via FIB/SEM tomography and electrochemical impedance spectroscopy and finally validated.

microstructure --- modeling --- Mikrostruktur --- Elektromobilität --- Impedanz --- impedance --- Kathode --- cathode --- lithium-ion battery --- Lithium-Ionen Batterie

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The model-aided cathode design for lithium ion batteries is presented, which enables a systematically minimization of loss processes and an increase of power and energy density. The cathode model is parametrized without values from literature by combining microstructure analysis via FIB/SEM tomography and electrochemical impedance spectroscopy and finally validated.

microstructure --- modeling --- Mikrostruktur --- Elektromobilität --- Impedanz --- impedance --- Kathode --- cathode --- lithium-ion battery --- Lithium-Ionen Batterie

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The focus of this work is on the modelling of the degradation behaviour of conventional lithium-ion cells with graphite/NMC electrodes in conjunction with electrolytes based on LiPF6 in organic solvents. The potential for improvements of parameterization methods dealing with physical-chemical aging effects and simulation studies for optimization of the battery lifetime is shown. In the process of model parameterization mostly data-based as well as non-invasive analysis methods are used.

Mechanical engineering & materials --- Lithium-Ionen-Zelle --- Batterie --- Elektrofahrzeug --- Degradationsmechanismen --- Lebensdauerprädiktion --- lithium-ion cell --- battery --- electric vehicle --- degradation mechanism --- lifetime prediction