Solid-state battery technology leader QuantumScape is approaching the end of 2025 with its characteristic steady progress, once again achieving all key goals set at the beginning of the year. The company has completed installation of core equipment for high-volume QSE-5 cell production, marking a crucial step forward in QuantumScape’s solid-state battery scale-up strategy.
Based in San Jose, California, QuantumScape is one of the most anticipated developers in the solid-state battery sector. The company’s proprietary ceramic solid-state separator technology enables greater energy density, faster charging, and enhanced safety, promising to transform the future of clean mobility.
Cobra Process Establishes Technical Foundation
This past summer, QuantumScape fully integrated its breakthrough Cobra solid-state separator manufacturing process into baseline production, enabling the company to produce solid-state batteries at the gigawatt level. Compared to the previous-generation Raptor process, Cobra achieves approximately 25 times improvement in heat treatment efficiency, and represents a 200-fold improvement over the company’s 2023 production methods.
Tim Holme, QuantumScape co-founder and CTO, stated: “Cobra is a step-change innovation in ceramic processing, enabling a major improvement in productivity compared to Raptor—which was already a considerable advancement compared to the previous generation. This advancement is central to bringing our high-performance solid-state battery platform to market at gigawatt scale.”
The Cobra process brings significant innovation to ceramic solid-state separator production, benefiting both scalability and cost efficiency. This breakthrough laid the groundwork for higher-volume B1 sample production of QuantumScape’s QSE-5 solid-state lithium-metal cells, which will eventually lead to scaled output for the battery market, particularly BEV batteries.
Eagle Line: Critical Step Toward Commercialization
QuantumScape has completed installation of key equipment for the Eagle Line at its San Jose facility. The Eagle Line is QuantumScape’s highly automated battery cell pilot production line, intended to serve as the foundation for future gigawatt-hour-scale production by the company’s technology licensing partners.
To commemorate this milestone, QuantumScape will hold an inauguration event for the Eagle Line at its San Jose headquarters in February 2026. The event will include customer representatives, technology partners, and government officials, and will feature a showcase tour of the Eagle Line.
Dr. Siva Sivaram, QuantumScape CEO and President, stated: “Completing this annual goal and inaugurating the Eagle Line is a crucial step forward in our scale-up strategy. The Eagle Line features our groundbreaking Cobra separator process combined with highly automated battery cell production. It is intended, upon ramp-up, to satisfy customer demand for QSE-5 cells and support future technology demonstrations.”
2025 Goals Fully Achieved
QuantumScape sets a series of key goals each year, and to our knowledge, has never missed an annual target. In the third quarter of 2025, QuantumScape began shipping B1 sample cells featuring separators produced using the Cobra process, representing the company’s most advanced cells to date.
By combining the high-performance QSE-5 design with more efficient production processes, these cells represent a major step toward high-volume commercial production of QuantumScape technology for electric vehicles and other applications. Cobra-based QSE-5 cells are featured in QuantumScape’s first vehicle program with the Volkswagen Group—the Ducati V21L motorcycle.
Technical Specifications and Market Outlook
The QSE-5 B sample cells achieve an energy density of 844 Wh/L and can fast charge from 10% to 80% in 12.2 minutes. These performance metrics demonstrate the no-compromise performance profile of QuantumScape’s solid-state battery technology.
PowerCo, Volkswagen Group’s battery subsidiary, is advancing the industrialization of solid-state batteries. The two companies reached a licensing partnership agreement in July 2024, targeting “series production of solid-state cells on a gigawatt-hour scale.” This technology licensing model not only facilitates production scaling but may also help avoid potential tariffs by transferring intellectual property rather than physical goods.
As of the end of Q2 2025, QuantumScape reported sufficient runway to continue solid-state cell development through 2029, providing solid backing for the company’s long-term technology roadmap.
Industry Impact and Future Prospects
QuantumScape’s steady progress sets a benchmark for the entire solid-state battery industry. In this emerging technology field, often called the “holy grail” of clean mobility, the company has earned market trust through its approach of not over-promising but often over-delivering.
The Eagle Line inauguration marks not only a major advancement in QuantumScape’s own production capabilities, but more importantly, provides a replicable blueprint for gigawatt-scale production for technology licensing partners. With the February 2026 inauguration approaching, the industry will have the opportunity to closely observe this production line that could transform the EV battery landscape.
From Raptor to Cobra, and now to the Eagle Line, QuantumScape is systematically addressing the biggest challenge facing solid-state batteries—scaled production. While the exact commercialization timeline remains to be seen, each milestone achieved by the company continues to advance solid-state battery technology from laboratory concept toward market reality.
