QuantumScape

Type: Company (Solid-State Battery — US, NYSE: QS)

QuantumScape is the principal United States entrant in the solid-state battery race and the clearest Western counterpoint to the Chinese (CATL/BYD) and Japanese (Toyota) programs. It develops anode-free lithium-metal cells with a proprietary ceramic separator, and pursues a capital-light process-licensing model — proving manufacturing on a pilot line so that OEM/licensing partners build gigawatt-hour fabs, rather than building volume capacity itself. QuantumScape was explicitly flagged as a Knowledge Gap in the prior KB compilation; this page closes it.

Technology

• Architecture: Anode-free (lithium-metal anode formed in situ on first charge) with a ceramic solid separator — no manufactured anode means higher energy density and lower bill-of-materials, at the cost of tighter manufacturing tolerances.
• QSE-5 cell: 844 Wh/L volumetric energy density; 10→80% fast charge in ~12.2 minutes; 10C continuous discharge capability.
• Cobra separator process: the company's core manufacturing IP — ~25× faster heat-treatment speed than the prior-generation Raptor process, in a fraction of the floor space. Cobra entered baseline production June 2025; B1 sample cells began shipping Q3 2025.

Eagle Line (Pilot Production)

• Inaugurated February 4, 2026 in San Jose, California, attended by automotive OEM customers, ecosystem partners, and government officials.
• A "suite of equipment, materials and highly automated processes" built around the Cobra process — the blueprint for production of QS technology.
• Purpose: produce cells for customer sampling/testing and technology demonstrations, and demonstrate scalable production to enable licensing partners to manufacture at gigawatt-hour scale.

Commercial Strategy & Partnerships

• Licensing model — structurally opposite to BYD's vertical integration and Toyota's materials-partnership route. The Cobra process is the asset; partners carry the capital burden of GWh-scale fabs.
• Honda joint development (June 18, 2026) — multi-year joint research and manufacturing agreement for solid-state batteries across EVs, motorcycles, power equipment, and energy storage. QS shares rose ~12% on the announcement. (Honda separately began its own SSB pilot at its Sakura plant in January 2025.)
• Long-standing relationship with Volkswagen / PowerCo as a foundational licensing partner.

Key Contributions

• Anode-free QSE-5 cell at 844 Wh/L with ~12-min fast charge and 10C discharge (QuantumScape Eagle Line)
• Cobra separator process: ~25× faster heat treatment than Raptor; Eagle Line pilot inaugurated Feb 4, 2026 (QuantumScape Eagle Line)
• World-first anode-free SSB vehicle demonstration — Ducati V21L, IAA Munich, Sept 2025 (QuantumScape Eagle Line)
• Honda multi-year joint solid-state development agreement, June 2026 (QuantumScape Eagle Line)

Mentioned In

• Solid-State Batteries — US anode-free / ceramic-separator pathway; licensing-model entrant

Related Entities

• CATL — Chinese sulfide-SSB leader; vertical-integration / R&D-scale model
• BYD — Chinese SSB + sodium-ion; vertical integration
• Toyota — Japanese oxide/lithium-sulphide pathway; materials-partnership model
• Samsung SDI — Korean S-Line pilot