Funktionsintegration von Karosserieelementen in das Batteriegehäuse
| Autor: | Krüger, Christopher Stephan |
|---|---|
| Jazyk: | němčina |
| Rok vydání: | 2023 |
| Předmět: | |
| DOI: | 10.18154/rwth-2023-03704 |
| Popis: | Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2023; Aachen : RWTH University Aachen, Schriftenreihe Automobiltechnik 1 Online-Ressource : Illustrationen, Diagramme (2023). = Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2023 Within the context of the advancing electromobility, battery systems for storing electrical energy required for the vehicle propulsion are becoming increasingly important. Due to the fact that battery systems have lower energy densities compared to conventional storage systems, the optimization of this key component is currently the focus of development. In order to reach acceptable driving ranges for customers, volumetric large and weight intensive battery systems are required. However, the available package space within the vehicle is limited. In addition, internal battery components such as the modules need to be protected from external load impact, which would occur in a crash scenario. Current market vehicles foresee the positioning of the flat, rectangular shaped bat-tery system in the floor area of the vehicle, centered between the axles. The battery is attached within the vehicle assembly process to the vehicle body. The accessibility or removal possibility of the battery system is typically given. From a structural design point of view however, the vehicle body and the battery housing resemble two separate identities and present structural redundancies, when they are combined. With regard to the lightweight design aspect and the available package space for modules, the achievable potential is therefore not fully utilized. In the context of the present thesis, the structural redundancies between the battery housing and the vehicle body were investigated on a full vehicle level and a functional integration approach was developed. The aim of this approach was to reduce the total structural weight of the battery housing and the vehicle body as well as increasing the package space for modules. The direction of integration was carried out from the vehicle body towards the battery housing, allowing a closed battery system, which can be removed from the vehicle. The vehicle floor and the vehicle rocker were identified as suitable components for integration into the battery housing. The functional integrating battery housing was investigated on a system level and on a full vehicle level by the means of structural simulations using common load cases. In a comparison with statistical data from real world crash tests, the simulation results were evaluated. It was shown that the results were within the range of the statistical dispersion of the crash performance of real word vehicles and were therefore in an acceptable range. In comparison with a reference structure, which was designed according to the state of the art, the developed functional integration approach was evaluated. Based on this approach, the total structural weight of the vehicle body and the battery housing can be reduced by up to 13.5 kg and the package space for modules can be increased by up to 70 mm. Published by RWTH University Aachen, Aachen |
| Databáze: | OpenAIRE |
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