Porsche is clearly confident in the future of all-electric vehicles. With the release of the all-electric Taycan sedan still buzzing through the industry, there's also talk of the 718 Cayman being Porsche's first electric sports car. Hot on the heels of that, Rimac has announced that Porsche has put even more money into automotive electrification.

Several months ago, Porsche purchased a 10 percent stake in the Croatian electric vehicle company, Rimac Automobili, and now it has increased that stake to 15 percent.

Although Rimac still gets called a start-up, it was founded in 2009 by Mate Rimac. Rimac also develops and produces battery packs and drivetrain systems, but is mainly known for building the fastest claimed production electric vehicle, the Concept One. Rimac is no joke and has an incredible amount of knowledge and experience with electric vehicles. Now, Porsche has access to that to help the German automaker keep moving into the future. An upcoming all-electric hypercar 918 Spyder successor, perhaps?

On working with Rimac for a year already, Lutz Meschke, deputy chairman of the executive board and CFO of Porsche AG, says: "It quickly became clear to us that Porsche and Rimac could learn a lot from each other."

"We are just at the beginning of our partnership - and yet our high expectations have already been met. We have many ideas that we want to act together in the future. The key is to create a win-win situation for both partners and to add value to our end customers by developing exciting electrified models," Says Mate Rimac.

This is not Rimac's only partnership with a well-established automaker. Most notably, Hyundai has a $90 million investment in the company and has been working with Rimac while developing its own vehicles. And, at the same time all this is happening, Rimac is still working on the C_Two which is claimed to be an electric hyper-grand touring car packing 2,000 horsepower.