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Electrode Particle Atomistic structure 50–200 μm 1–50 μm Repeat unit Battery pack Single cell e− Li+ 1–10 cm 0.1–1 m Li+ Li 50–1000 nm 0.1–10 nm Time scale Figure 4.1: Hierarchy of modeling detail and system size. Adapted from [189]; battery pack image reproduced from [190]. The modeling activities were carried out in the group of Prof. Wolfgang G. Bessler at the German Aerospace Center1 (DLR) as well as the group of Prof. Arnulf Latz at DLR and the Helmholtz Institute Ulm for Electrochemical Energy Storage (HIU)2. Parts of this work have already been published in [P1–P4]. The process of building a physically-based model essentially consists of three steps: 1. choosing a set of phenomena to be described by the model 2. formulating the governing equations and connecting them in a meaningful way to come up with a consistent description of the problem 3. assigning values to all parameters introduced in step two This work is building on top of an existing modeling framework (see below). Hence, for most aspects of the model step one and for several even step two have been com- pleted in advance. Before the steps taken in this work are described in detail, however, 1Institute of Engineering Thermodynamics, German Aerospace Center (DLR), Pfaffenwaldring 38–40, 70569 Stuttgart, Germany 2Helmholtz Institute Ulm for Electrochemical Energy Storage, Helmholtzstr. 11, 89081 Ulm, Germany 69 Length scale computational cost number of parametersPDF Image | Lithium-Sulfur Battery: Design, Characterization, and Physically-based Modeling
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