With efforts to reduce carbon emissions and increase fossil fuel efficiency, electric vehicles have become a promising solution for automakers. However, due to the limited battery capacity, battery-powered electric vehicles offer a significantly shorter driving range compared to internal combustion engine vehicles. Weight reduction is considered an effective method for increasing the driving range of electric vehicles [1]. The goal of this study is to reduce the weight of the battery enclosure of an electric vehicle. Analyses of lightweight material substitution tradeoffs for electric vehicles can offer great weight and cost savings [2]. In this study, it is aimed to replace standard materials such as steel and aluminum with composite materials. We explore the use of different composite materials (carbon fiber reinforced plastic, glass fiber reinforced plastic, hybrid fiber reinforced plastic, etc.) in battery enclosure, and compare the performances of various composite materials in terms of bending and torsional strength, vibration resistance, crash performance, nail penetration resistance and weight of the battery enclosure. In order to make these comparisons, finite element analyses (performed using ANSYS and LS-DYNA software) will be utilized. This study was supported by the Scientific and Technological Research Council of Türkiye (TÜBİTAK) project no. 22AG024 under program no. 22AG001.