Mobility applications

Definition (what it is)

In advanced materials and engineering, mobility applications are the uses of materials, components, and subsystems that enable the propulsion, energy storage, structural integrity, control, protection, and safe operation of vehicles and transportation systems. The term spans road vehicles—especially electrified platforms (BEVs, PHEVs, HEVs)—and extends to commercial vehicles, micro‑mobility, off‑highway, and, where relevant, rail. In a materials context, it focuses on the properties, processing, and integration of materials at the component and system level rather than on transport services or business models.

Key functions and technical characteristics (its function and purpose)

Structural and crash performance: Provide stiffness, strength, fatigue life, and controlled energy absorption for occupant safety and battery protection; often via multi‑material architectures (advanced high‑strength steels, aluminum and magnesium alloys, fiber‑reinforced polymers, sandwich panels).
Lightweighting: Reduce mass to improve range, efficiency, payload, and dynamics using tailored material selection (e.g., 5xxx/6xxx/7xxx aluminum, press‑hardened steel, magnesium, thermoplastic/thermoset composites) and design optimization (topology, gage reduction, hollow sections).
Thermal management: Maintain batteries, power electronics, motors, and cabins within optimal temperature windows; employs high‑conductivity materials (aluminum, copper, graphite), thermal interface materials (gels, pads, foams), heat exchangers/cold plates, phase‑change media, and dielectric or refrigerant‑based cooling, including immersion cooling.
Electrical performance and high‑voltage safety: Enable efficient power flow and electromagnetic compatibility with laminated busbars, high‑conductivity conductors, EMI shielding, and robust insulation systems; ensure creepage/clearance, dielectric barriers, potting/encapsulation, and flame retardancy (e.g., UL 94 V‑0).
Functional integration: Combine structure, sealing, thermal management, electrical routing, and EMC into fewer parts (e.g., battery enclosures that are structural, sealed, fire‑resistant, and thermally managed).
Durability and environmental resistance: Provide corrosion and chemical resistance, sealing against moisture/ion ingress, stone‑chip/abrasion resistance, and weatherability using coatings (e‑coat, galvanizing, anodizing), sealants, gaskets, and desiccants.
NVH management: Improve noise, vibration, and harshness via tuned materials, constrained‑layer laminates, foams, and elastomeric isolators/bushings.
Manufacturability and cost: Support high‑throughput, scalable production and robust assembly with appropriate forming, casting, molding, and joining processes; enable automation, dimensional control, and repairability.
Safety and regulatory compliance: Meet crashworthiness, battery abuse, thermal propagation mitigation (venting paths, intumescent or ceramic barriers), high‑voltage isolation, and ingress protection requirements; comply with international standards and OEM specifications.
Sustainability and circularity: Lower embedded carbon, increase recycled/bio‑based content, design for disassembly and recyclability, and reduce reliance on critical or high‑impact materials.

Relevance (its relevance in modern EV and advanced mobility design)

Range and energy efficiency: Mass reduction and aerodynamic underbody solutions decrease traction energy demand, enabling longer range or smaller battery packs.
Fast charging and battery life: Thermal and electrical design (e.g., optimized busbars, low‑impedance connections, effective heat spreading/cooling) supports high C‑rate charging while controlling temperatures and gradients to limit degradation.
Platform architecture: Flat skateboard platforms, cell‑to‑pack (CTP) and cell‑to‑chassis (CTC) integrations, and compact e‑axles rely on stiff, lightweight structures and multifunctional materials for packaging efficiency, crash performance, and a low center of gravity.
Reliability and uptime: Robust sealing, corrosion protection, and insulation preserve performance under harsh environments, extending service life and reducing warranty risk.
Autonomy and connectivity: Engineered plastics and composites enable sensor, antenna, and electronics housings (radomes, camera/LiDAR mounts) with required mechanical protection, weatherability, and EMI control.
Total cost and manufacturability: Materials and processes (e.g., high‑pressure die casting, molded composites, hybrid joining) influence capital expenditure, takt time, yield, and reparability in high‑volume production.
Sustainability: Recycled metals, recycled/bio‑based polymers, and low‑carbon supply chains reduce lifecycle greenhouse gas emissions and support regulatory and ESG targets.

Examples (subsystems and components)

Battery systems: Module and pack structures; CTP/CTC designs; trays and lids with integrated sealing, cooling, and fire barriers; thermal runaway venting features; thermally conductive gap fillers.
Powertrain and power electronics: E‑motor stators/rotors (including hairpin windings) and housings; inverter and DC/DC enclosures; laminated copper busbars; HV junction boxes; onboard chargers.
Charging and HV distribution: AC/DC inlets, fast‑charge connectors and cables, coolant‑conditioned charge ports, HV harnesses and connectors.
Body and chassis: Body‑in‑white, crash rails, rocker and underbody reinforcements, closures, suspension arms, composite leaf springs, subframes, and crossmembers.
Thermal systems and aerodynamics: Cold plates, heat exchangers, direct‑cooled busbars, heat pipes/vapor chambers, underbody aerodynamic shields and skid plates.
Electronics, sensors, and interiors: Sensor brackets, radomes, antenna‑integrated panels, E/E housings, mounts, and interior structural components.
Micro‑mobility and commercial/off‑highway: Frames, battery enclosures, driveline housings, and protective structures tailored for weight, durability, and cost.

Synonyms and related terms

E‑mobility applications; automotive applications; vehicle systems; transportation applications; advanced/future mobility; intelligent/smart mobility; automotive lightweighting. In materials and manufacturing contexts, “mobility applications” typically refers to components and material systems rather than mobility services.

Typical materials

Metals and alloys: Advanced high‑strength steels (including press‑hardened steel) for BIW and crash structures; aluminum sheets/extrusions (5xxx/6xxx/7xxx) and high‑pressure die castings (including large structural castings); magnesium die castings; copper for busbars and windings; titanium for select fasteners and high‑performance parts.
Polymers and composites: Engineering thermoplastics (PA, PC, PBT, PP; high‑temperature PEEK, PPS) for E/E, under‑hood, and structural inserts; thermosets (epoxy, vinyl ester); fiber‑reinforced polymers (GFRP/CFRP), SMC, LFT, and continuous‑tape laminates; thermally/electrically conductive and flame‑retardant grades.
Ceramics and dielectrics: Alumina and aluminum nitride substrates for power modules; mica papers and ceramic blankets for fire barriers; glass/ceramic insulators; silicone/epoxy potting and encapsulation; aerogels and phase‑change materials for insulation/thermal buffering.
Thermal interface and heat‑transfer materials: Graphite sheets, gap pads, gels, greases, foams; heat pipes, vapor chambers; microchannel cold plates; dielectric immersion fluids and refrigerants for direct cooling.
Coatings, adhesives, and seals: E‑coat, galvanic and conversion coatings, anodizing; structural and crash‑durable adhesives; sealants and gaskets; intumescent and ablative coatings for fire protection.
Hybrid and multi‑material systems: Metal–polymer–metal laminates; bonded/riveted metal‑composite assemblies; overmolded inserts; sandwich panels.
Sustainability‑oriented materials: Recycled aluminum and steel, recycled polymers and fibers, bio‑based resins/fillers, and low‑embedded‑carbon material options.

Manufacturing and processing methods

Metals: Stamping, roll forming, hot forming/press hardening; extrusion and stretch forming; high‑ and low‑pressure casting; forging and machining; resistance spot, laser, MIG/TIG, and friction stir welding; self‑piercing riveting, clinching, and hybrid adhesive/mechanical joining.
Polymers and composites: Injection and compression molding; blow molding; resin transfer molding (RTM), vacuum infusion, SMC/BMC; filament winding, pultrusion; thermoplastic tape placement and overmolding; autoclave and out‑of‑autoclave curing; in‑mold functional integration.
Advanced/digital manufacturing: Simulation‑driven design, topology optimization, digital twins, and virtual validation; additive manufacturing for complex parts, conformal cooling, lightweight brackets, and rapid tooling; in‑line metrology and process control for quality assurance.

Testing, validation, and standards (examples)

Batteries and high voltage: UN 38.3 (transport), UL 2580, SAE J2464/J2929, IEC 62660/61960, ECE R100; insulation resistance and dielectric withstand; OEM thermal propagation, venting, crush, and abuse tests.
Vehicle crash and safety: FMVSS and ECE regulations for crashworthiness and pedestrian protection.
Materials and flammability: UL 94; ISO 3795/FMVS 302 for interior materials; EMI/EMC compliance; ingress protection ratings (e.g., IP67, IP6K9K).
Corrosion and durability: OEM cyclic corrosion, stone‑chip impact, environmental sealing and water‑ingress tests; regulatory compliance such as REACH and RoHS.