Lightweight Materials Used in Battery Vehicles

Abstract

Electric vehicles (EVs) weigh 20–30% more than internal combustion engine vehicles of similar power and class due to battery weight. Reducing weight is crucial, as EV batteries have lower energy density than gasoline. Lightweight materials must retain high mechanical strength and meet crash and fire safety standards, especially for interior components. Materials such as aluminum and magnesium alloys, high-strength steel, carbon fiber-reinforced plastics, graphene nanocomposites, polymer coatings, and advanced ceramics are replacing traditional cast iron and steel. These innovations also have applications in aerospace. This chapter explores the properties, applications, and processing methods of lightweight EV materials, including raw material preparation and component fabrication, such as advanced ceramic and polymer coatings. Challenges like machinability, joining dissimilar metals, forming, corrosion resistance, and wear are addressed through design innovations. Techniques such as additive manufacturing, rapid design iterations, and AI-driven maintenance help overcome these issues. End-of-life material characteristics and recyclability are discussed within a circular economy context. With growing demand for high-performance, lightweight materials, research and innovation in this area are expected to expand significantly in the next decade.