The Application segment of the Heat Transfer Fluids for Electric Vehicles market is defined by the primary thermal management function each fluid performs within the vehicle architecture. Battery cooling fluids dominate the segment, accounting for roughly 45 % of market revenue, because they must maintain lithium‑ion cell temperatures within a narrow optimal range to preserve capacity, cycle life, and safety. Power electronics cooling fluids, representing about 35 % of the market, address the high heat flux generated by inverters, converters, and motor drives, where fluid thermal conductivity and dielectric strength are critical. The remaining 20 % is attributed to cabin heating applications, where heat transfer fluids are used in heat‑pump or resistive heating loops to provide rapid cabin temperature rise while minimizing energy draw from the battery. Each application contributes uniquely to overall market size by dictating fluid formulation requirements, volume demand, and supply‑chain logistics, thereby shaping the broader Heat Transfer Fluids for Electric Vehicles segmentation landscape.