The EV Heat Problem Is a Range Problem
An electric drivetrain converts about 85–90% of battery energy into motion, but the rest becomes heat — concentrated in the drive motor, the power inverter and the battery pack. Every degree above the design temperature cuts efficiency, fast-charging speed and battery cycle life. Thermal management is not a comfort feature; it is what determines range, charging time and warranty cost.
Where Extruded Aluminium Works in an EV
Motor housings use extruded aluminium water jackets to pull heat off the stator. Inverters and on-board chargers mount on extruded finned heat sinks under IGBT or SiC modules. Battery packs use aluminium cooling plates and frame profiles in liquid-cooled architectures, and DC fast-charging stations pack extruded radiators into every cabinet. One alloy, one process — dozens of thermal roles.
Why Extrusion Wins in Automotive
6063-T5 delivers around 200 W/m·K thermal conductivity at a fraction of the weight of copper or steel — critical when every kilogram affects range. Extrusion also forms complex coolant channels and dense fin arrays in a single pass, with tooling amortised over high volumes. For automotive programmes, consistency matters most: tight dimensional tolerances, repeatable heat treatment and auditable material traceability.
Specifying for EV Programmes
Automotive sourcing is built on evidence: IATF 16949-aligned quality systems, PPAP documentation and stable mass-production output. When you evaluate an aluminium partner for EV components, ask about extrusion tonnage, in-house anodizing and heat treatment, and batch-to-batch consistency across millions of metres. Siken Aluminum’s 30,000-ton annual capacity and export track record support EV suppliers from prototype to full-rate production.