Rimac Working On New Battery Tech That Will Move EVs To A New Level

Technology / Comments

4680-style batteries are set to be more widely adopted throughout the industry.

It's challenging to keep up with the rapid developments being made in battery technology for modern electric vehicles. The Ford Mustang Mach-E wasn't around for too long at all before the Blue Oval updated its battery packs, and Hyundai did the same with its Ioniq 5. Companies like BMW are looking further ahead and investing in battery technologies that promise a range of 600 miles for the heavy iX SUV. As another example of ongoing improvements, Tesla has made a lot of noise about its new 4680 batteries as equipped to certain Model Ys. The tech is so good that even Rimac, maker of insanely expensive exotics like the Nevera and supplier of batteries to other automakers, wants to use it too.

Rear View Rimac

In case you forgot, Tesla's 4680 batteries use this name in reference to their size. These soda-can-sized batteries have larger cells that measure 46 mm in diameter and 80 mm in height. In a recent real-life test, they were also shown to speed up charging times. Rimac is currently developing a battery module platform that is based around these 46 mm (1.8 inch) diameter cylindrical cells. These batteries have greater energy density and far fewer cells than older batteries.

"The new module platform forms the basis of most of our future programs," said Wasim Sarwar Dilov, Rimac Technology's head of research and advanced engineering. The company is currently in talks with three different battery makers to supply cells for the new pack module.

Rimac has various contracts in place to supply automakers outside of its stakeholders with batteries, including Koenigsegg and Aston Martin. Apparently, the company wants to reduce the pack mass not attributable to cells which it terms the 'cell-to-pack conversion efficiency'. For example, the Porsche Taycan's battery pack is 63% cells and the Rimac Nevera's is 67%. By the start of 2025, Rimac is aiming to get this number up to 75%. "The higher we can make this number, the less parasitic mass we have," said Dilov.

Rimac's target of supplying 40,000 battery packs in 2023 will rise to 200,000 by 2028. Hopefully, Rimac realizes the same reduction in battery manufacturing costs for the 4680 batteries. More than this, that lower cost will, hopefully, filter down to the consumer in the near future.

Driving Front Angle Rimac
Source Credits: Automotive News Europe

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