The development of Rivian’s R2 validation builds continues to progress. We know so because the American automaker’s founder and CEO, RJ Scaringe, continues to pepper us with welcome updates with plenty of fantastic images. The latest post features the inner workings of Rivian’s Maximus drive unit, which will propel the upcoming R2 EVs when they hit the market next year.
Another day, another exciting social media update from RJ Scaringe. Nine days ago, the Rivian CEO shared a peek at the company’s new Maximus drive unit, designed to be more compact and efficiently built to help reduce cost-per-unit production.
Our only look was from outside the drive unit’s casing at the time, but it was exciting news nonetheless. As an encore, Scaringe posted photos of the R2 validation builds on a pilot line at the automaker’s facility in Normal, Illinois.
This evening, Scaringe took to Instagram and X once again to share a better look at the inner workings of the Rivian Maximus drive unit. Check it out:
RJ shares more images of Rivian’s Maximus development
Rivian’s CEO posted the three images above, which showcase some interesting perspectives of the developing drive unit. As previously shared by Rivian, Maximus uses a new continuous winding technique that reduces the total welds per stator and thus the total overall cost of building each one.
For comparison, Rivian’s current Enduro drive unit requires 264 stator welds, while Maximus only needs 24. You can see the stator windings in the image above to the left. Scaringe shared excitement in the progress of the Rivian team’s Maximus drive unit as well as some insight in his post:
I love the packaging on Maximus — the drive unit for R2. It has a side mounted inverter that utilizes flat area at the end of the motor to minimize the length of bus bars, keeping them light and efficient. The large planar shape also allows all processing and power electronics to exist on a single printed circuit board.
The inverter chassis closes out the oil cooled motor cavity and seamlessly routes coolant from the power modules to the drive unit’s heat exchanger with no extra parts.
Overall, the inverter part count is reduced by 41% relative to Enduro and structural inverter lid saves more parts and fasteners by also serving as the drive unit mount. I love this design efficiency. (heart emoji)
Looks fantastic, RJ. We can’t wait to see the visual progress of the R2 you share next!
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