Application segmentation categorizes fluid usage by functional domains within electric and hybrid vehicles, revealing demand patterns that shape the market’s revenue composition. Battery thermal management fluids dominate, providing precise temperature control for lithium‑ion packs and capturing the largest market slice due to intensive cooling requirements. Powertrain lubrication fluids serve electric motor bearings and gearboxes, balancing low friction with wear protection; this segment is expanding as vehicle power densities increase. HVAC cooling fluids, including refrigerants and secondary coolants, enable cabin comfort while maintaining overall system efficiency, representing a moderate share. Brake system fluids, now formulated with high‑dielectric properties to coexist with electric high‑voltage systems, occupy a smaller yet critical niche. The application‑based distribution aligns with engineering priorities, with battery cooling accounting for 45 % of market value, powertrain lubrication 30 %, HVAC cooling 15 %, and brake fluids 10 %. Understanding these application dynamics is essential for accurate market taxonomy and strategic planning.