SANDWICH PANEL COMPOSITE BASED LIGHT-WEIGHT STRUCTURE DESIGN FOR RESERVED ENERGY STORAGE SYSTEM (RESS) PROTECTION

• Main Author: Daniel
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/38547
• Institution: Institut Teknologi Bandung

The research in electric vehicle requires the development of a safe Reserved Energy Storage System (RESS). The RESS, which typically uses Li-ion battery, is a renewable power souce which can help reducing carbon footprints. But in the application, the RESS development faces problems of its vulnerability to the environment. Lithium-ion battery may experience thermal runaway if exposed to impact load that result in short circuit. Hence, a protective structure that is capable to hold impact load from outside is needed. Nowadays, most of the model that is being developed still use aluminium as its base material, but this research will utilize Carbon Fiber Reinforced Polymer (CFRP) as a substitute of metal structure. This takes into account the amount of structural mass thus reducing the energy needed to be carried. The research is conducted using non-linear finite element method with LS-DYNA solver to perform analysis on structural crashworthiness. First, basic simulation involving flat plate crushing is performed to get the force and penetration data. Then from variations of thickness parameters, material orientation and topology, it was found that the optimum orientation was quasi-isotropic while for NavTruss (Navy Truss) geometry with orientation [{0/90}2/[{45/-45}/{0/90}]3]s. Two types of sandwich panel topology are studied. The single core is better than double core because it has greater second moment of area. In the single core, two types of geometry BRAS (Blast Resistance Adaptive Sandwich) and NavTruss are evaluated. NavTruss has a better performance because the failure occurs on the crashfront element while in the BRAS the failure occurs in the curve so that the element does not absorb the maximum energy. In the optimum case, compared to the aluminium model there was a mass savings + of 36 percent.