ProLogium and Rimac Show Off Their Next Gen EV Battery Pack in Paris

So basically: ProLogium, a battery company from Taiwan, and Rimac Technology, the Croatian company behind the crazy fast Rimac cars, are showing a concept battery pack at the Paris Motor Show. It’s built around ProLogium’s next gen cells. The plan is a working piece of it at CES 2027, a full working pack in the second half of 2027, and testing in an actual car on public roads in the second half of 2028.

Who are these guys

ProLogium has been around since 2006. They make what they call lithium ceramic batteries, which is their take on solid state. Solid state is the battery everybody’s been waiting on because it should hold more energy and be safer than what’s in EVs now. They’ve got a factory in Taiwan and they’re building a big one in Dunkirk, France.

Rimac Technology is part of the Rimac Group in Croatia. Rimac is famous for the Nevera, an electric hypercar that does 0 to 60 in under 2 seconds. Rimac Technology is the side that builds batteries and drive systems for other car companies. They even work with Bugatti.

So one makes cells, the other is really good at turning cells into a battery pack that actually works in a car.

What they showed

Right now it’s a mockup. Not a working battery yet. It’s what the pack is gonna look like.

The design is called cell to pack. Normally battery cells go into modules, and modules go into the pack. Cell to pack skips the middle step and puts the cells right into the pack. Less parts, less weight, more room for battery. BYD and CATL already do versions of this with regular cells, so it’s not a crazy idea.

They’re using pouch cells, which are the flat soft ones.

The timeline

• Now: concept mockup in Paris
• CES 2027: a working battery segment, basically a small chunk of the pack
• Second half of 2027: a full working pack
• Second half of 2028: in a real car and on public roads

They’re doing it step by step on purpose. Test a small piece, learn, then go bigger.

What they’re trying to fix

A good cell isn’t enough. You have to keep it cool, deal with it swelling, and fit it all in the car without adding weight. Rimac’s product architect Daniel Kišić said they’re testing a bunch of different setups at the same time. Some go for max range and less weight, some go for max performance.

He said once it’s proven, carmakers could pick what they want. More range at the same weight, a smaller lighter battery with the same range, or something in between.

Why it matters

Solid state batteries have been “a few years away” for like a decade. A lot of companies can make good cells in a lab. Getting them into a pack that survives in a real car is the hard part, and that’s what this is about.

Plus it’s a Europe angle. ProLogium’s French factory and Rimac in Croatia means this could end up being a battery made mostly in Europe, which they really want right now.

My take

Honestly it’s a mockup, so I’m not getting too hyped yet. Road testing in 2028 means you’re probably not buying a car with this until later than that.

But Rimac knows batteries better than almost anyone, so if they think this is worth building I’d pay attention. CES 2027 is when we’ll know if it actually works. Would you pay more for an EV with a solid state battery if it got way more range?