Volvo may have uncovered a unique approach to enhancing electric vehicle (EV) efficiency—by using heaters to reduce aerodynamic drag. While traditional EVs are designed to conserve energy, heating systems typically come with a significant energy cost. Volvo’s new patent, however, suggests a novel application: heating the car’s outer surfaces, particularly the windows, to improve on-road efficiency.
The idea, discovered in a patent filing by Carmoses, involves warming the air around the vehicle by heating its outer skin. Warmer air is less dense, reducing the resistance—or drag—on the car as it moves. This seemingly small change can have a noticeable impact on energy consumption and, consequently, range.
The patent explains, “Heating a portion of the outer surface of the vehicle has the effect that a boundary layer of air adjacent to the heated surface is also warmed. Consequently, the density of the air in the boundary layer is reduced. Since drag is a function of the density of the air in this layer, heating the outer surface reduces drag and increases vehicle efficiency.”