BYD has been granted a patent for a powertrain system that integrates an electric motor, transmission, and controller in a vehicle. The design includes an angled space to help the transmission’s half shaft extend along its axial direction, with the controller mounted within this space. GlobalData’s report on BYD 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 BYD, Battery management systems was a key innovation area identified from patents. BYD's grant share as of February 2024 was 71%. Grant share is based on the ratio of number of grants to total number of patents.

Integrated powertrain with electric motor, transmission, and controller

Source: United States Patent and Trademark Office (USPTO). Credit: BYD Co Ltd

A recently granted patent (Publication Number: US11919386B2) discloses a powertrain system that integrates an electric motor, a transmission, and a controller in a unique configuration. The powertrain includes an angled space that allows a half shaft of the transmission to extend along the axial direction of the transmission. The controller is mounted to either the electric motor or the transmission and is electrically connected to the electric motor. The design reduces the overall height of the powertrain by overlapping the controller with the electric motor and/or transmission in the up-down direction. Additionally, the controller and electric motor feature three-phase wire connection portions that are docked together, enhancing the efficiency and compactness of the system.

Furthermore, the powertrain system includes a wire harness rack mounted to the controller support and the electric motor, featuring a wire arrangement groove for organized wiring. The integration of the electric motor case body and the transmission case body into a single unit creates the angled space for the half shaft of the transmission. The mounting of the controller in this space, with a mounting groove on its side, further streamlines the design of the powertrain. The system is assembled using threaded fasteners that extend obliquely along the radial direction of the electric motor and transmission, ensuring secure attachment. Overall, the patented powertrain design offers a compact, efficient, and integrated solution for electric motor and transmission systems in various applications.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

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.