QuantumScape Reaches Significant Milestone as Cobra Separator Process Enters Production Phase

QuantumScape Achieves Major Milestone: Cobra Separator Process Enters Baseline Production
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**SAN JOSE, Calif. — June 24, 2025** — QuantumScape Corporation (NYSE: QS), a leader in next-generation solid-state lithium-metal battery technology, has announced a significant milestone in scaling up its production capabilities: the successful integration of its advanced Cobra separator process into baseline cell production.

The Cobra process serves as the foundation of QuantumScape’s high-throughput, continuous-flow separator production platform. It is designed to enable faster and more energy-efficient production while occupying a smaller physical footprint compared to earlier methods. This innovation represents a substantial improvement in ceramic separator manufacturing. When compared to the previous Raptor process, Cobra offers approximately a **25x improvement** in heat treatment speed and requires much less space per film start — crucial advantages for designing a scalable gigafactory production line.

“Our team has made impressive strides in advancing Cobra, a technology that exemplifies our progress in scaling solid-state battery production,” said Dr. Siva Sivaram, CEO of QuantumScape. “By significantly enhancing throughput and reducing the equipment footprint, Cobra provides a powerful pathway for commercializing our next-generation battery technology.”

Tim Holme, co-founder and CTO of QuantumScape, noted, “Cobra is a transformative innovation in ceramic processing, leading to major productivity improvements compared to Raptor, which was already a significant advancement over previous generations. This development is essential for bringing our high-performance solid-state battery platform to market at gigawatt scale.”

The Cobra platform replaces the company’s earlier Raptor process, which was utilized for B0 cell production and had already achieved important gains in separator quality and process stability. With Cobra established as the new baseline, QuantumScape will continue to enhance its production speed, efficiency, and scalability, paving the way for higher-volume B1 sample production. These production metrics are expected to further improve as the company rolls out future iterations of Cobra.

### About QuantumScape Corporation

QuantumScape is on a mission to revolutionize energy storage to facilitate a sustainable future. The company’s next-generation solid-state lithium-metal battery technology is designed to provide greater energy density, faster charging, and improved safety, all of which support the transition from traditional energy sources toward a lower carbon future. For more information, visit [www.quantumscape.com](http://www.quantumscape.com).

### Forward-Looking Statements

This press release may contain “forward-looking statements” as defined in Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These statements include, but are not limited to, the company’s plans and objectives for future operations and growth, the performance and application of its technology, including Cobra, and the potential impacts of the company’s technology. Such statements are based on management’s current expectations and assumptions regarding future events, which are inherently subject to risks and uncertainties. Therefore, actual results may differ materially from those projected. QuantumScape disclaims any obligation to update forward-looking statements, except as required by law.