Zero Motorcycles. has been granted a patent for a liquid-cooled motor enclosure designed to enhance heat transfer. The enclosure features a fluid-tight space for coolant, strategically placed inlet and outlet manifolds, and internal projections to increase surface area and turbulence, ensuring efficient cooling of the motor. GlobalData’s report on Zero Motorcycles gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Zero Motorcycles, Battery management systems was a key innovation area identified from patents. Zero Motorcycles's grant share as of July 2024 was 38%. Grant share is based on the ratio of number of grants to total number of patents.
Liquid cooled motor enclosure for improved heat transfer
The granted patent US12074497B2 describes a liquid-cooled motor enclosure designed to enhance thermal management for motors, particularly in electric vehicles. The enclosure consists of an outer shell and an inner shell, creating a fluid-tight space between them. This design includes a recess in the inner shell to accommodate the motor, which is thermally coupled to the inner shell. The enclosure features an inlet manifold at one axial end and an outlet manifold at the opposite end, facilitating coolant flow. Notably, the inner shell incorporates multiple projections that extend into the space between the shells, which serve to increase turbulence in the coolant, thereby improving heat transfer efficiency. The patent also specifies that the inner shell may have a higher thermal conductivity than the outer shell, further optimizing thermal performance.
Additionally, the motor assembly includes a stator and rotor housed within the liquid-cooled enclosure, with provisions for a radiator and pump to circulate coolant fluid. The design allows for the use of various coolant types, including water-based or oil-based fluids. The patent emphasizes the adaptability of the motor enclosure for two-wheeled electric vehicles, highlighting its potential application in modern electric mobility solutions. The inclusion of features such as a fan to enhance airflow through the radiator underscores the comprehensive approach to managing heat dissipation from the motor to the external environment. Overall, this patent presents a novel solution for improving the thermal management of electric motors, which is critical for performance and longevity in electric vehicles.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
