Purem by Eberspächer is bringing its high-strength steel battery housing to the European EV market, following the start of series production in China at volumes exceeding 100,000 units per year from the second half of 2026. The company will present the technology at AABC Europe 2026 in Mainz, Germany, from May 18–21 (booth 606).
The steel housing is positioned as a cost and weight alternative to the aluminum designs currently standard in EV battery packs. Higher-strength steel enables thinner walls, Purem says, resulting in housings that are lighter than aluminum equivalents—while also being cheaper to produce and lower in manufacturing carbon footprint due to lower CO₂ intensity in production and superior recyclability. The China program was secured through nominations from Chinese OEMs.
For the European market, Purem has co-founded a consortium to develop a stainless steel variant through a concept study. Partners include Sphere Energy, Bertrandt, the Tillmann Group, Reinert, Baosteel Lasertechnik and 3M. The group is targeting a design that eliminates the need for additional corrosion protection while achieving crash resistance through purpose-designed profiles and reinforcements. Purem also says it’s using AI tooling to calculate individual customer specifications and manufacturing adaptations faster than conventional engineering methods.
Purem is the exhaust and acoustic systems division of Eberspächer Group, applying its existing expertise in materials processing and welding to battery enclosure development.
Source: Eberspächer
