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ABS (Acrylonitrile butadiene styrene)
ABS is an amorphous thermoplastic terpolymer made from three monomers: acrylonitrile, 1,3-butadiene, and styrene. Industrially, it is produced by grafting a styrene–acrylonitril...
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Abuse testing
Abuse testing is the deliberate application of conditions that are outside a product’s specified operating or handling limits—such as foreseeable misuse, mishandling, faults, or...
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Air cooling strategies
Air cooling strategies are thermal management approaches that remove heat from components or systems by transferring it to air, primarily through convection. They include both d...
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Anti-reflection film
Anti-reflection film (AR film) is a thin, engineered optical coating or laminated polymer film designed to reduce surface reflectance and increase transmittance at targeted wave...
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Antiviral surfaces
Antiviral surfaces are engineered materials, surface treatments, or coatings designed to inactivate or substantially reduce the viability of viruses that land on them. They achi...
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Assembly protection
Assembly protection is the collection of design features, materials, and manufacturing processes used to prevent damage, contamination, degradation, or failure of assemblies and...
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Autoclave consolidation
Autoclave consolidation is a composite manufacturing process in which fiber-reinforced laminates—most commonly prepregs—are compacted and cured inside a sealed, pressurized vess...
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Automotive solutions
Automotive solutions refers to integrated sets of materials, components, subsystems, design concepts, manufacturing processes, and engineering services that are configured to me...
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Autonomous driving
Autonomous driving is the capability of a road vehicle to perform part or all of the dynamic driving task (DDT)—perception, decision-making, and control—using an onboard automat...
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Battery casing
A battery casing (also: battery housing, battery enclosure, battery pack case) is the structural outer enclosure that contains and protects electrochemical cells and associated ...
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Battery cell
A battery cell is the smallest standalone electrochemical unit that converts chemical energy into electrical energy via redox (reduction–oxidation) reactions. It contains two el...
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Battery cooling lines
Battery cooling lines are the fluid-conveyance components—rigid tubes, flexible hoses, or integrated channels—of an electric or hybrid vehicle’s battery thermal management syste...
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Battery electric vehicle (BEV)
A battery electric vehicle (BEV) is a vehicle propelled solely by one or more electric traction motors using electrical energy stored in an on‑board rechargeable battery pack. I...
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Battery enclosure
A battery enclosure is the protective, structural housing that contains a battery system and its ancillary components. It typically holds cells or modules, the battery managemen...
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Battery energy density
Battery energy density is the amount of electrical energy a battery can store per unit mass (gravimetric energy density, typically Wh/kg) or per unit volume (volumetric energy d...
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Battery fire
A battery fire is an uncontrolled combustion or high‑heat thermal event involving an electrochemical battery (cell, module, or pack). It typically results from abnormal internal...
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Battery fire testing
Battery fire testing is a set of standardized experimental procedures used to evaluate how batteries—typically lithium-ion cells, modules, packs, and complete systems—behave whe...
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Battery housing
A battery housing (also called a battery enclosure, battery pack casing, or battery case) is the structural assembly that contains and protects a battery pack or energy storage ...
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Battery pack
A battery pack is an assembly of multiple rechargeable cells integrated with electrical interconnects, mechanical housing, thermal management, protection devices, and control el...
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Battery tray
A battery tray is the structural base and enclosure component that houses, supports, and protects a traction battery pack in an electrified vehicle (battery electric, plug‑in hy...
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Bio-based fillers
Bio-based fillers are particulate, fibrous, or plate-like additives derived wholly or predominantly from renewable biological resources—such as wood, plant fibers, agricultural ...
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Body panels
Body panels are the shaped exterior (and associated inner) components that form a vehicle’s visible “skin” and many close‑out surfaces. They attach to the body‑in‑white (BIW) or...
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Bumpers
A bumper is a protective assembly mounted at the front and rear of a vehicle to absorb or mitigate impact forces in low- to moderate-speed collisions, reducing damage to the veh...
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Burner test
A burner test is a standardized fire exposure in which a controlled flame from a specified burner is applied to a material specimen, component, or assembly to assess ignitabilit...
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Bus bars
A bus bar (also written busbar) is a rigid or semi‑rigid metallic conductor used as a common node to collect, carry, and distribute electrical power between multiple circuits or...
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C-rate
C-rate expresses how fast a rechargeable battery is charged or discharged relative to its nominal capacity. It is the applied current normalized by capacity: C-rate = I / Q, whe...
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Cabin experience
Cabin experience is the overall quality of a vehicle’s interior environment as perceived by occupants. It spans physical and digital attributes that shape comfort, usability, an...
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Cable routing optimization
Cable routing optimization is the systematic design and arrangement of electrical cables and high-voltage (HV) harnesses within a vehicle to minimize mass, cost, electromagnetic...
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Carbon fiber
Carbon fiber is a high-strength, high-stiffness filament made predominantly of carbon atoms (>90%) arranged in turbostratic, graphite-like microstructures. It is produced fro...
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CASE (Connected, Autonomous, Shared, Electric)
CASE is an industry framework describing four converging trends that are reshaping road vehicles and mobility services: connectivity, automated driving, shared-use business mode...
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Cell-to-pack (CTP) technology
Cell-to-pack (CTP), also written C2P, is an electric-vehicle battery architecture in which individual cells are integrated directly into the battery pack without intermediate mo...
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Center consoles
In automobiles, a center console is the assembly located in the central area of the front interior, typically starting at the lower instrument panel and extending rearward betwe...
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Charge–discharge cycles
A charge–discharge cycle is one complete sequence in which a rechargeable energy‑storage device (typically a battery, but also supercapacitors and flow batteries) is charged fro...
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Circular economy
A circular economy is a systems-based economic model that seeks to decouple value creation from the consumption of finite resources by: Designing out waste and pollution Keeping...
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Clean mobility solutions
Clean mobility solutions are transport technologies, energy pathways, service models and policies that deliver passenger and freight movement with low or zero tailpipe emissions...
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Closed-loop recycling
Closed-loop recycling is a materials management system in which production scrap or end‑of‑life products are collected, reprocessed, and fed back into the same product system or...
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Cold plates
A cold plate is a liquid-cooled heat exchanger: a thermally conductive metal plate with internal flow passages (channels, fins, or embedded tubes) through which a coolant circul...
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Compound annual growth rate (CAGR)
CAGR is the constant annualized rate of growth that turns a beginning value into an ending value over a specified multi‑year period, assuming reinvestment and annual compounding...
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Conduction cooling
Conduction cooling is a thermal management approach in which heat is removed primarily by thermal conduction through solid materials in direct contact. Heat flows from a hot com...
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Connected car
A connected car is a road vehicle with embedded or aftermarket communication hardware and software that enables bidirectional data exchange with external systems. This connectiv...
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Continuous fiber reinforcement
A reinforcement architecture for composite materials in which load‑bearing fibers run in uninterrupted lengths across a part or along its principal load paths. The continuous fi...
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Convection cooling
Convection cooling is the removal of heat from a solid surface by the motion of a surrounding fluid (gas or liquid). Heat is carried away by a combination of advection (bulk flu...
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Coolant flow optimization
Coolant flow optimization is the systematic design, analysis, and control of liquid-cooling circuits so that coolant distribution, velocity, and pressure achieve required heat r...
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Cooling circuits
A cooling circuit is a closed-loop thermal management subsystem that circulates a heat-transfer fluid to carry heat away from components and deliver it to a heat sink. It is use...
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Cooling tubes
Cooling tubes are hollow conduits that route a coolant or refrigerant to remove heat from components by convection through the fluid and conduction through the tube wall. They c...
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Crashworthiness
Crashworthiness is the ability of a vehicle or structural system to protect its occupants—and maintain the integrity of critical systems—during and after a collision. It does so...
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Crosslink density
Crosslink density is the number of permanent network junctions (crosslinks) per unit volume or mass in a polymer network. It quantifies how tightly polymer chains are connected ...
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Crush tests
Crush tests are mechanical tests in which a material, component, or assembly is subjected to controlled compressive loading—quasi-static or dynamic—until a specified deformation...
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Cycle time reduction
Cycle time reduction is the systematic shortening of the time required to complete one full, repeatable cycle of work for a unit (part, assembly, batch, or lot), from the moment...
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Cylindrical cell
A cylindrical cell is a single electrochemical energy-storage unit packaged in a rigid, round metal can with a fixed diameter and length. It is a standardized battery form facto...
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Delamination resistance
Delamination resistance is the ability of a laminated or layered material system (for example, fiber‑reinforced composites, adhesive‑bonded joints, films, coatings, or electroni...
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Dielectric fluids
A dielectric fluid is a liquid electrical insulator formulated to have high dielectric strength and very low electrical conductivity so it can withstand electric fields without ...
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Dielectric strength
The maximum electric field an insulating (dielectric) material can withstand without electrical breakdown (transition from insulator to conductor). It is usually expressed as kV...
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Display covers
A display cover is the protective, user-facing layer mounted over an electronic visual display in a vehicle, typically part of an infotainment, instrument cluster, head-up displ...
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Door panels
A door panel is the interior trim assembly that covers the inner side of a vehicle door. It forms the occupant-facing surface of the door, concealing the window regulator, latch...
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Drapability
Drapability is the ability of a flexible sheet material—such as a textile, composite reinforcement (dry fabric, prepreg, or organosheet), paper/film, or knit—to conform to a thr...
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Drop tests
A drop test is a controlled method of applying impact or shock by releasing a component, assembly, product, package, or material specimen from a specified height and orientation...
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Dynamic seals
Dynamic seals are sealing elements used between components that move relative to each other—most commonly in rotary, reciprocating, or oscillatory motion—to control the passage ...
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Electric vehicle (EV)
An electric vehicle (EV) is a road vehicle propelled wholly or primarily by one or more electric traction motors using electrical energy as the main source of motive power. The ...
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Electrical connectors
An electrical connector is an electromechanical interface that joins electrical conductors to establish a continuous circuit. Connectors may be separable (plug and receptacle) o...
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Electrolytes
An electrolyte is a substance or medium that conducts ions while remaining essentially insulating to electrons. It provides the ionic pathway between electrodes in electrochemic...
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End-of-life recycling
End-of-life (EoL) recycling is the set of technical, logistical, and regulatory processes by which products that have reached the end of their service life are collected, depoll...
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End-of-Life Vehicles (ELV) Directive
The End-of-Life Vehicles (ELV) Directive is European Union legislation—Directive 2000/53/EC—that sets rules for the design, collection, treatment, reuse, recycling, and recovery...
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EPDM rubber
Ethylene propylene diene monomer (EPDM) rubber is a family of synthetic elastomers based on terpolymers of ethylene, propylene, and a non-conjugated diene (commonly ENB—ethylide...
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EU CO₂ emissions targets
Legally binding, fleet‑average limits on tailpipe carbon‑dioxide emissions from new passenger cars (M1) and new light commercial vehicles/vans (N1) registered in the European Un...
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Expanded lightweight core
An expanded lightweight core is a low-density structural core material created by introducing a controlled cellular architecture—by foaming, honeycomb expansion, or architected ...
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Exterior trims
Exterior trims are non-structural or lightly structural components attached to the outside of a vehicle body to finish edges and openings, cover joints, protect surfaces, and pr...
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Extrusion
Extrusion is a manufacturing process in which a material is forced through a shaped die to produce a long product with a constant cross-sectional profile. It is used for metals ...
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Fire containment
Fire containment is the engineering practice of confining ignition, flames, heat, smoke, hot gases, pressure, and ejecta to a defined compartment so that an event does not sprea...
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Fire propagation
Fire propagation is the spatial and temporal spread of combustion from an ignition source to adjacent fuels, materials, components, or compartments. It encompasses the advance o...
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Flame breakthrough resistance
The ability of a material, component, or assembly to prevent a flame from penetrating through its thickness and igniting or sustaining flaming on the unexposed side for a specif...
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Flame retardant additives
Flame retardant additives are chemical substances incorporated into combustible materials—such as polymers, textiles, foams, coatings, adhesives, and composites—to reduce the li...
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Flame-smoke-toxicity (FST) requirements
Flame-smoke-toxicity (FST) requirements are technical and regulatory criteria that set acceptable limits for how materials, components, and assemblies behave in fire. They quant...
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Flammability V-rating (UL94)
The UL 94 flammability V‑rating is a set of vertical burn classifications (V‑0, V‑1, V‑2) defined by Underwriters Laboratories for evaluating the flame behavior of polymeric mat...
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Fleet emissions targets
Regulatory limits on the average greenhouse gas (GHG) or pollutant emissions of a vehicle manufacturer’s new-vehicle fleet sold in a given jurisdiction over a defined period (of...
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Fuel cell electric vehicle (FCEV)
An FCEV is an electric vehicle that generates electricity onboard using a hydrogen fuel cell stack to power one or more electric traction motors. Hydrogen is stored in high‑pres...
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Glass fiber (GF)
Glass fiber is a reinforcing material made by drawing molten glass into fine continuous or chopped filaments that are bundled into strands, rovings, mats, or fabrics. These fibe...
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Global R&D network
A global R&D network is an organizational operating model in which a company’s research, engineering, and validation activities are distributed across multiple countries or ...
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Global supply chain
A global supply chain is the end‑to‑end, internationally distributed network of organizations, people, assets and information systems that plan, source, make, move, sell, servic...
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Glycol/H₂O coolant mixture
Glycol/H2O coolant mixture Definition A liquid heat‑transfer and antifreeze medium composed of a glycol (typically ethylene glycol or propylene glycol) blended with water, plus ...
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Green transformation
Green transformation is the systematic transition of organizations, value chains, sectors, and economies toward low‑carbon, resource‑efficient, and circular operation across the...
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Haptic feedback
Haptic feedback is the use of tactile and kinesthetic cues—such as vibrations, forces, motions, or surface effects—delivered through a physical interface to convey information, ...
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Head-Up Display (HUD)
A head-up display (HUD) is a transparent or semi-transparent display system that projects critical driving and vehicle information into the driver’s forward field of view, typic...
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Headlamp housings
A headlamp housing is the structural and protective enclosure that forms the rear and side “bowl” of a vehicle’s headlamp assembly. It provides the interfaces to the vehicle bod...
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Heat dissipation
Heat dissipation is the transfer of thermal energy from a heat-generating region (a component, subsystem, or system) to its surroundings so that temperatures remain within allow...
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Heat insulation
Heat insulation is the use of materials, component designs, and assembly practices that reduce unwanted heat transfer between regions at different temperatures. It acts against ...
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Heat shielding
Heat shielding refers to components, layers, or assemblies that reduce heat transfer from high‑temperature sources to temperature‑sensitive parts, occupants, or the environment....
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Heating circuits
A heating circuit is an electrical or fluid-based network that generates, transports, and regulates heat for a defined load or set of loads. It converts energy (electrical, chem...
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High-dielectric-strength insulation
High-dielectric-strength insulation is an insulating material or complete insulation system engineered to withstand high electric field intensity without dielectric breakdown. T...
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High-performance displays
High-performance displays are automotive-grade visual interfaces designed to deliver high brightness, wide color gamut, fast response, high resolution, and robust environmental ...
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High-speed charging safety tests
High-speed charging safety tests are a suite of laboratory and system-level evaluations applied to electric vehicles (EVs), traction batteries, battery management systems (BMS),...
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High-temperature resistance
High-temperature resistance is the ability of a material or component to maintain its required mechanical, dimensional, electrical, and chemical performance when exposed to elev...
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High-voltage bus
A high-voltage bus is the conductive network or common power rail that distributes electrical power at elevated voltage within a device, vehicle, or installation. It may be DC o...
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High-voltage connectors
A high-voltage (HV) connector is an electromechanical interface that safely joins and disconnects conductors in circuits operating above conventional low-voltage levels—commonly...
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High-voltage wiring
High-voltage wiring is the system of conductors, insulation, shielding, connectors, terminations, and protective elements engineered to carry and distribute electrical power at ...
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High-volume production
High-volume production is the large-scale, highly repeatable manufacture of standardized, identical or closely similar products, typically in quantities from tens of thousands t...
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Hot-spot management
Hot-spot management is the prediction, detection, mitigation, and control of localized regions of elevated temperature (“hot spots”) within components and systems. It is a sub-d...
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HV junction box
High-voltage junction box (HVJB) Definition A high-voltage junction box is an enclosed electrical assembly used in battery electric vehicles (BEVs), plug‑in hybrid electric vehi...
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Hybrid electric vehicle (HEV)
A hybrid electric vehicle (HEV) is a road vehicle that combines a conventional internal combustion engine (ICE) with one or more electric traction motors and an onboard battery ...
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Hydrogen vehicle (HV)
A hydrogen vehicle is a vehicle that uses hydrogen as an onboard energy carrier for propulsion. The most common type is the fuel cell electric vehicle (FCEV), which converts com...
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Immersion cooling
Immersion cooling is a thermal‑management method in which heat‑generating components—such as battery cells, power electronics, motors, servers, or e‑axle assemblies—are partiall...
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Impact-resistant laminates
Impact-resistant laminates are engineered, multilayer sheet structures designed to absorb, dissipate, and withstand sudden mechanical loads (e.g., stone strikes, tool drops, deb...
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In-mold decoration
In-mold decoration is a plastics processing technique in which a pre-printed and often pre-formed decorative film (appliqué) is placed inside an injection mold. During molding, ...
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In-mold labeling (IML)
In-mold labeling (IML) is a pre-decoration and functionalization process in which a pre-printed label or film is placed inside a mold cavity before injection molding, blow moldi...
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Instrument panels
In automotive contexts, an instrument panel (IP)—often called the dashboard or dash—is the cross‑car assembly ahead of the driver and front passenger that integrates driver info...
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Insulation resistance
Insulation resistance (IR) is the electrical resistance measured across an insulating material or between conductive parts separated by insulation when a voltage is applied. It ...
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Intelligent interior cabin
An intelligent interior cabin is the integrated set of vehicle interior systems that embed sensors, connectivity, edge computing, and actuators to perceive occupants and context...
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Interior trims
Interior trims are the visible and tactile finishing components of a vehicle’s passenger compartment. They cover, decorate, and locally protect the interior body-in-white and st...
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Internal combustion engine (ICE)
An internal combustion engine is a heat engine in which fuel is burned with an oxidizer (typically air) inside the working chambers of the engine. The hot, high‑pressure combust...
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Jet flame exposure
Jet flame exposure is a fire loading condition or test scenario in which a material, component, subassembly, or structure is subjected to the intense, highly directional flame p...
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KAITEKI philosophy
KAITEKI philosophy is a corporate sustainability and innovation framework developed by Mitsubishi Chemical Holdings Corporation (now Mitsubishi Chemical Group) that seeks long-t...
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LED lighting lenses
An LED lighting lens in automotive applications is an optical component, typically a molded transparent element, placed over one or more light‑emitting diodes to refract, and in...
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Lifecycle analysis (LCA)
Lifecycle analysis (also called life cycle assessment, LCA) is a standardized method for quantifying the potential environmental impacts of a product, process, or service across...
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Lifecycle cost reduction
Lifecycle cost reduction (LCCR) is the systematic minimization of the total cost of owning, operating, supporting, and retiring a product, asset, or system across its entire lif...
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Lightweight engineering
Lightweight engineering is the systematic design and optimization of components, assemblies, and systems to minimize mass while meeting or improving all required performance, sa...
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Liquid cooling
Liquid cooling is a thermal management method in which a liquid coolant circulates through channels, jackets, cold plates, or immersion baths to absorb heat from components and ...
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Liquid cooling plates
A liquid cooling plate (also called a cold plate, liquid cold plate, or cooling plate) is a flat, thermally conductive component with internal fluid passages or embedded tubes t...
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Lithium-ion battery (Li-ion)
A lithium-ion battery is a rechargeable electrochemical energy storage device in which lithium ions shuttle reversibly between two host electrodes through a nonaqueous electroly...
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Low VOC emissions
Low VOC emissions refers to the reduced release of volatile organic compounds (VOCs) from materials, products, assemblies, or manufacturing processes into the air under defined ...
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Manufacturing automation
Manufacturing automation is the application of machines, robotics, control systems, and software to execute manufacturing tasks with minimal direct human intervention. It spans ...
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Masking solutions
Masking solutions are temporary protective materials, components, and application methods used to shield selected areas of a part from subsequent processes such as painting, pow...
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Mass production
Mass production is the high-volume manufacture of standardized, interchangeable parts and finished products using repeatable processes, specialized tooling, and coordinated mate...
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Melt flow index (MFI)
Melt flow index (MFI), also called melt flow rate (MFR), is a standardized measure of the mass of a thermoplastic polymer that flows through a specified capillary die under a pr...
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Mild hybrid electric vehicle (MHEV)
A mild hybrid electric vehicle is a vehicle with a conventional internal combustion engine (ICE) assisted by a relatively small electric motor and battery. The electric system c...
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Mobility applications
In advanced materials and engineering, mobility applications are the uses of materials, components, and subsystems that enable the propulsion, energy storage, structural integri...
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Mobility solutions
Mobility solutions are integrated systems of vehicles, infrastructure, digital platforms, materials, and services that enable the movement of people and goods with an emphasis o...
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Multi-axial fabrics
Multi-axial fabrics are engineered textile reinforcements made by stacking two or more layers of unidirectional (UD) fibers at defined angles (for example 0°, ±45°, 90°) and con...
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Nail penetration tests
A nail penetration test is a destructive safety test in which a sharp, electrically conductive metal probe (commonly a steel “nail”) is driven into a charged electrochemical cel...
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Near-net-shape manufacturing
Near-net-shape manufacturing is a family of production approaches that create a part whose geometry is very close to its final (“net”) form, so only minimal finishing (for examp...
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Next-generation vehicles
Next-generation vehicles (NGVs) are road vehicles across passenger, commercial, and special-purpose segments that combine electrified propulsion (battery-electric, hybrid, and h...
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No thermal propagation (NO TP) batteries
No thermal propagation (NO TP) batteries are battery systems engineered so that a thermal runaway event initiated in one cell does not propagate to adjacent cells, modules, or t...
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Noise and vibration reduction
Noise and vibration reduction is the multidisciplinary practice of lowering unwanted sound (airborne) and mechanical oscillations (structure-borne) generated by machines, vehicl...
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Noise, vibration and harshness (NVH)
NVH is the discipline concerned with the generation, transmission, perception, measurement, analysis, and control of noise and vibration in vehicles and other mechanical systems...
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Non-woven composites
Non-woven composites (often written nonwoven composites) are composite materials in which at least one constituent is a nonwoven fiber web—i.e., a sheet or web of staple or cont...
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Organofleece
A fiber‑reinforced thermoplastic semi‑finished product in which a nonwoven (fleece) reinforcement is combined with a melt‑processable polymer matrix. The fleece may use glass, c...
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Original Equipment Manufacturer (OEM)
An original equipment manufacturer (OEM) is a company that designs, engineers, and manufactures complete products or components that are used as original equipment in another co...
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Out-of-autoclave curing (OoA)
Out-of-autoclave curing is a family of composite manufacturing processes that consolidate and cure fiber‑reinforced polymer laminates without using a high‑pressure autoclave. In...
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Overcurrent protection
Overcurrent protection is a safety function and the set of devices, circuits, and control strategies that automatically detect and limit or interrupt electrical current when it ...
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Parts consolidation
Parts consolidation is the deliberate design and manufacturing practice of reducing the number of discrete components in a product or assembly by integrating multiple functions ...
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Penetration tests
Penetration tests are controlled evaluations of how difficult it is to pierce, breach, or otherwise compromise a target. The term is used in two principal domains: Mechanical/ma...
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Performance optimization
Performance optimization is the systematic, iterative process of improving how well a system, component, or process meets defined, quantitative objectives under real-world const...
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Phase change cooling
Phase change cooling is a thermal management approach that removes, transports, or temporarily stores heat by exploiting the latent heat absorbed or released when a material cha...
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Plug-in hybrid electric vehicle (PHEV)
A plug-in hybrid electric vehicle (PHEV) is a hybrid electric vehicle that combines an internal combustion engine (ICE) with one or more electric traction motors and a rechargea...
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Pouch cell
A pouch cell is a rechargeable electrochemical cell packaged in a flexible, heat‑sealed multilayer laminate pouch instead of a rigid cylindrical or prismatic metal can. The pouc...
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Prepreg
Prepreg (short for pre-impregnated) is a semi-finished composite material made of continuous fibers (e.g., carbon, glass, aramid, basalt) in the form of unidirectional tape or f...
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Prismatic cell
A prismatic cell is a rechargeable electrochemical cell packaged in a flat, rectangular (rectangular-prism) enclosure. It is most commonly a lithium‑ion cell but the format can ...
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Range anxiety
Range anxiety is the apprehension or stress that a vehicle will not have enough remaining energy—battery charge or fuel—to reach its destination or the next viable charging/refu...
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Recyclability
Recyclability is the ability of a material, component, or product to be collected, identified, safely dismantled, separated, processed, and reintroduced as manufacturing feedsto...
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Recycled carbon fiber (rCF)
Recycled carbon fiber (rCF) is carbon fiber recovered from post‑industrial scrap (e.g., prepreg offcuts, trim waste, out‑of‑spec parts) or post‑consumer/end‑of‑life carbon‑fiber...
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Refrigerant cooling
Refrigerant cooling is a thermal management method that uses a closed-loop vapor-compression refrigeration cycle to absorb heat from a component, space, or fluid and reject it t...
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Rheological performance
Rheological performance is the practically relevant, measurable description of how a material flows and deforms under applied stress, strain, or strain rate as a function of tim...
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Rocket test
A context-dependent term with two established meanings: Rocket engine or motor ground test: Controlled operation of a rocket engine, motor, or stage on a fixed test stand or in ...
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Roof components
Roof components are the structural and closure elements that form the upper enclosure of a vehicle body-in-white (BIW) and its finished interior/exterior surfaces. Together with...
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Sandwich structures
A sandwich structure is a layered construction in which two thin, stiff face sheets (skins) are bonded to a relatively thick, lightweight core. The core keeps the faces separate...
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Scrap reduction
Scrap reduction is the systematic practice of minimizing the amount of material and product discarded during manufacturing because it cannot be sold as part of the finished good...
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Scratch protection
Scratch protection is the set of design strategies, materials, coatings, films, and process controls used to prevent or reduce surface scratching, marring, and abrasion during m...
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Scratch-resistant surfaces
Scratch-resistant surfaces are materials, finishes, or applied coatings engineered to reduce the initiation, depth, and visibility of scratches, marring, and abrasion caused by ...
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Separator film
A separator film is a thin, porous, electrically insulating membrane placed between the positive and negative electrodes of an electrochemical cell, most commonly rechargeable l...
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Serial manufacturing
Serial manufacturing (also called serial production or series production) is an industrial production mode in which a defined series of identical or near‑identical parts or asse...
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Shear thinning
Shear thinning is a non-Newtonian flow behavior in which a material’s apparent viscosity decreases as the applied shear rate (or shear stress) increases. Many shear‑thinning flu...
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Shielded cables
Shielded cables are electrical cables in which one or more insulated conductors are surrounded by a conductive layer (the shield), such as a metallic braid, foil, spiral (serve)...
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Silicone rubber
Silicone rubber is a family of elastomeric polymers whose backbone is composed of siloxane (–Si–O–Si–) linkages with organic side groups (commonly methyl, phenyl, vinyl, or fluo...
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Stabilizers and antioxidants
Stabilizers and antioxidants are additive classes used in polymers, elastomers, lubricants, fuels, coatings, and adhesives to slow or prevent degradation caused by heat, oxygen,...
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State of charge (SoC)
State of charge (SoC) is a dimensionless measure of how much charge remains in a rechargeable battery relative to its maximum available (usable) charge at the current state of a...
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State of health (SoH)
State of health (SoH) is a dimensionless metric, typically expressed as a percentage, that describes the current condition of a rechargeable battery (cell, module, or pack) rela...
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Static seals
A static seal is a sealing element placed between two components that do not move relative to each other once assembled. When clamped, bolted, or pressed into place, the seal is...
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Stiffness
Stiffness is the resistance of a material, component, or structure to elastic (recoverable) deformation under load. Quantitatively, stiffness is the slope of the load–deflection...
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Strength-to-weight ratio
The strength-to-weight ratio is the load-carrying capability of a material or structure normalized by its weight-related quantity. In materials science it is most rigorously def...
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Structural composites
Structural composites are engineered, multi‑constituent materials designed to carry significant mechanical loads in primary or secondary structures. They combine a high‑strength...
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Surface protection
Surface protection is the collective term for treatments, coatings, films, and engineered layers applied to a substrate to prevent or slow degradation from mechanical, chemical,...
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Sustainability targets
Sustainability targets are quantifiable, time‑bound objectives that organizations set to reduce negative environmental and social impacts and increase positive outcomes across o...
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Tail lamp lenses
A tail lamp lens is the outer, light-transmitting cover of a vehicle’s rear lighting assembly (often called the rear combination lamp). It encloses and optically conditions ligh...
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Technology readiness level (TRL)
Technology readiness level (TRL) is a standardized scale, originally developed by NASA and now widely adopted across government and industry, for estimating how mature a technol...
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Temperature gradient control
Temperature gradient control is the deliberate design and regulation of spatial temperature differences (the temperature gradient, typically expressed in K/m) within materials, ...
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Temporary protective films
Temporary protective films are thin, removable polymer films or peelable coatings applied to surfaces to protect them from mechanical damage, contamination, and environmental ex...
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Thermal conductivity
Thermal conductivity is an intrinsic material property that quantifies how effectively heat is conducted through a substance due to a temperature gradient. It is commonly denote...
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Thermal cycling durability
Thermal cycling durability is the ability of a material, component, or assembly to maintain structural integrity and functional performance when repeatedly exposed to alternatin...
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Thermal diffusion
Thermal diffusion is used in three closely related ways; the intended meaning depends on context: Heat diffusion (most common in heat transfer): The spreading of temperature wit...
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Thermal event
A thermal event is any abnormal or unintended temperature-related incident in a component, material, system, or environment that produces significant heat generation, heat accum...
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Thermal runaway
Thermal runaway is a self-accelerating overheating process in which the rate of heat generation within a system exceeds its ability to dissipate heat. The resulting positive fee...
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Thermal runaway mitigation
Thermal runaway mitigation is the integrated set of design features, materials, components, and control strategies used to prevent, delay, localize, or safely manage thermal run...
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Thermal runaway propagation (TRP)
Thermal runaway propagation (TRP) is the spread of thermal runaway from an initiating electrochemical cell to adjacent cells within a multi‑cell battery module or pack. In lithi...
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Thermal shock
Thermal shock is the mechanical and microstructural damage that occurs when a material, component, or assembly experiences a rapid temperature change. The sudden thermal gradien...
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Thermal spacers
A thermal spacer is an interposed component or layer that creates a controlled separation between parts to interrupt or reduce heat transfer. It does this primarily by adding th...
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Tier 1 supplier
A Tier 1 supplier is a company that supplies products or services directly to an original equipment manufacturer (OEM) or final assembler, without an intermediary tier. In manuf...
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Tier 2 supplier
A Tier 2 supplier is a company that provides materials, parts, subcomponents, sub‑assemblies, or specialized processes to a Tier 1 supplier, which integrates these inputs into s...
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Tooling optimization
Tooling optimization is the systematic design, selection, validation, and continuous improvement of production tooling—dies, molds, fixtures, cutting tools, jigs, electrodes, ga...
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Touch-sensitive surfaces
Touch-sensitive surfaces are functional surfaces that detect and respond to user contact or proximity (tap, swipe, slide, press) without mechanically actuated buttons. Sensing l...
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Towpregs
Towpregs are continuous fiber tows (filament bundles) that have been pre-impregnated with a polymer matrix to a controlled resin content and distribution. They are supplied as i...
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Transparent glazing
Transparent glazing refers to the clear, light‑transmitting panes integrated into a vehicle’s openings and closures to provide driver visibility, daylighting, weather protection...
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Transport protection
Transport protection refers to temporary protective systems, components, and procedures applied to products, parts, subassemblies, or complete equipment to prevent damage, conta...
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UL2596
UL 2596 is a UL Standards & Engagement test method that defines laboratory procedures for evaluating the thermal and mechanical performance of materials and constructions us...
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UN38.3
UN38.3 is Section 38.3 of the United Nations Manual of Tests and Criteria (ST/SG/AC.10/11). It specifies the standardized safety tests that lithium metal and lithium‑ion cells a...
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Unidirectional fiber layers
Unidirectional (UD) fiber layers are composite reinforcement plies in which essentially all continuous fibers are aligned parallel in a single, predominant direction within a sh...
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Voltage limiting devices
A voltage limiting device (VLD) is a protective component or circuit that restricts the voltage at its terminals to a predetermined safe level when exposed to transient or abnor...
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Wire harness
A wire harness (also called wiring harness, cable harness, wiring assembly, or wire/cable loom) is an organized assembly of electrical conductors, terminals, connectors, and pro...
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Woven fiber fabrics
Woven fiber fabrics are planar reinforcements made by interlacing two orthogonal sets of continuous filaments (warp and weft) in a repeated pattern. They are used as semi-finish...
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xEV (electrified vehicle)
xEV is an umbrella term for any vehicle that uses electric propulsion wholly or partially. The “x” stands for the many variants, including battery electric vehicles (BEV), hybri...
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Zero-emission vehicle
A zero-emission vehicle is a motor vehicle that produces no tailpipe emissions of regulated air pollutants or greenhouse gases during operation. In most regulatory frameworks, Z...