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Purem by Eberspaecher is advancing the development of battery housings made from high strength steel, positioning the solution as an alternative to aluminum for electric vehicle platforms, including buses and other heavy duty applications. The concept is being evaluated for the European market with a focus on cost efficiency, structural performance, and sustainability.
Battery housings are critical structural components, protecting both battery modules and passengers. While aluminum is commonly used, the steel based design enables reduced wall thickness while maintaining strength, supporting overall weight optimization in high capacity battery systems.
From a manufacturing perspective, the use of steel offers cost advantages and a lower CO2 footprint compared to aluminum. The material is also more easily recyclable, aligning with increasing regulatory and lifecycle requirements in electrified transport.
The solution builds on an existing industrialization phase in Asia, where the design has been validated with customers and is expected to reach series production volumes exceeding 100,000 units annually from the second half of 2026. This provides a basis for expansion into European vehicle programs.
To accelerate development, Purem by Eberspaecher integrates AI based tools to adapt housing designs to specific OEM requirements and translate them into manufacturing concepts more efficiently.
In parallel, a consortium including Sphere Energy, Bertrandt, Tillmann Group, Reinert, Baosteel Lasertechnik, and 3M is working on a stainless steel variant. The development focuses on integrating corrosion resistance directly into the material and improving crash performance through optimized structural profiles and reinforcements.
