REE Automotive, Cascadia Motion Advance Compact Electric Drive Unit Architecture

As electric vehicle platforms evolve toward higher integration and software-defined architectures, original equipment manufacturers (OEMs) are placing increasing emphasis on compact, modular electric drive units (EDUs) that reduce development time while supporting functional safety and scalability. The global EDU market is projected to double by 2035, with industry estimates indicating compound annual growth of approximately 9% between 2025 and 2035.

In this context, REE Automotive has signed a non-binding memorandum of understanding with Cascadia Motion, a wholly owned subsidiary of BorgWarner. The agreement outlines cooperation on the development, manufacturing, and commercialization of a next-generation electric drive unit based on REEcorner technology for global OEM programs.

Compact EDU architecture for OEM electrification
The proposed EDU integrates Cascadia Motion’s iM-125 inverter–motor module with REE’s REEcorner technology, resulting in a compact, cross-platform drive unit designed for broad vehicle applicability. Under the anticipated phased commercial plan, Cascadia Motion would manufacture and distribute the EDU, including off-the-shelf availability, subject to final contractual agreements.

The architecture is intended to support faster vehicle integration by combining propulsion, power electronics, and by-wire capabilities into a single, modular unit. For OEMs, this approach aims to reduce engineering effort and shorten time to market, particularly for new EV platforms.

Functional safety and software-defined vehicle support
Beyond mechanical integration, the combined EDU is designed to support higher levels of functional safety, including ASIL-D, and to align with software-defined vehicle (SDV) requirements. When paired with REE’s vehicle control units, the system is intended to enable secure and stable over-the-air updates, supporting continuous software improvement throughout the vehicle lifecycle.

REE has also indicated that it may provide Cascadia Motion with access to its existing EDU assembly line, tooling, inventories, and supplier network to support manufacturing scale-up, subject to negotiation of final terms.

Manufacturing, commercialization, and market context
Under the expected royalty-bearing arrangement, Cascadia Motion would have an exclusive, time-limited option to distribute the integrated EDU. The units are expected to be marketed as standardized products, addressing OEM demand for readily available propulsion solutions rather than bespoke developments.

The collaboration builds on a multi-year working relationship between the companies and reflects broader industry trends toward modular electrification components that can be deployed across multiple vehicle platforms.

Technical characteristics of the EDU
At the gearbox output, the EDU is specified with a permanent magnet motor operating at 400 V. Performance figures include peak torque of 3,000 Nm for 30 seconds, peak power of 100 kW, and maximum continuous torque and power of 2,150 Nm and 57 kW respectively. The unit operates with a 19.17 gear ratio, water–glycol cooling at 8 LPM and 65°C, and a total weight of 54 kg.

Relevance for future vehicle platforms
As OEMs transition toward centralized, zonal electrical architectures and by-wire systems, compact EDUs that integrate propulsion with software-ready control interfaces are becoming increasingly relevant. By combining REEcorner technology with Cascadia Motion’s propulsion systems, the proposed solution aims to support flexible vehicle designs, improved packaging efficiency, and scalable deployment across global EV programs.

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