Rimac Technology’s pack engineering anchors a path from mockup to public-road testing
(Image courtesy of ProLogium)
ProLogium and Rimac Technology have completed a concept mockup of the battery pack they began developing together under a September 2025 memorandum of understanding, and they will show it at the 2026 Paris Motor Show. A functional battery segment is now in development to test thermal management and cell-integration concepts, ahead of a full-scale pack in the second half of 2027 and public-road testing in the second half of 2028.
Where cell technology meets the vehicle
Putting a new cell into a car takes more than strong cell-level performance, so the collaboration pairs ProLogium’s next-generation cell technology with Rimac Technology’s battery system expertise and works through thermal management, cell integration and pack architecture together around a pouch cell-to-pack design. Vincent Yang, ProLogium’s Founder and CEO, calls the concept mockup the baseline of that work, which has moved from a shared technical vision into concrete engineering since the two companies announced the collaboration at IAA in 2025.
Building a battery segment before a full-scale system lets the companies collect test results and design feedback at each stage and judge whether the integration approach meets automotive battery-system requirements. Yang says the team is preparing to move into development and production of a functional battery that progresses toward a full-scale pack and vehicle integration validation.
Starting from vehicle-level requirements
Rimac Technology is developing a scalable cell-to-pack integration technology for solid-state pouch cells, and Daniel Kišić, its Principal Product Architect, says the company is testing a range of integration solutions in parallel on functional battery segments. They cover thermal management, swelling management, cell integration and system-level design, with some aimed at maximum energy density and reduced space and weight and others at performance. The work starts from vehicle-level requirements and looks to cut complexity, combine functions and shed weight with cost in mind, while keeping charging times and power output strong.
Rimac expects that, once validated at vehicle level, the result will deliver significant weight savings that improve driving efficiency and extend range. OEMs could then take more energy on board at the same weight, a smaller and lighter battery for the same range, or any mix of the two.
From a CES stand to public roads
Rimac Technology’s current roadmap puts the functional battery segment on display at CES 2027 and lists a full-scale functional battery pack as a milestone for the second half of 2027. In-vehicle and public-road testing come next, targeted for the second half of 2028, which widens the validation from integration concepts on a segment to a full pack and then to a vehicle, where system performance can be evaluated in an automotive environment.
In Paris the companies will present the concept mockup and outline the next steps in functional hardware development and integration validation. The segment testing will inform full-scale pack development, and each hardware stage ahead extends the validation toward vehicle installation.
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