As the automotive industry rapidly electrifies its fleets, interest is growing among OEMs and battery module producers in using composite materials for battery enclosures — covers and trays that hold and protect the frames and battery cells themselves.
There are many reasons for this, including the ability to reduce mass and stack tolerances, the fact that battery enclosures are multicomponent assemblies and poor impact performance of metals. In each of these areas, composite battery enclosures offer quantifiable benefits versus metals: lower mass, higher design freedom with greater space efficiency, faster assembly, no corrosion, greater durability and — with specific formulations — better flame resistance/fire containment.
Source: Price, performance, protection: EV battery enclosures, Part 1