QuantumScape unveils QS PowerBlock, its first battery product for AI data centers

QuantumScape, the solid-state battery company that spent years courting automakers, has a new customer in mind: the AI data center. On October 8, 2026, the company (NASDAQ: QS) introduced the QS PowerBlock. It is a modular, in-rack energy storage reference design, and the company’s first offering built specifically for data centers running AI workloads. What the QS PowerBlock actually claims The PowerBlock runs on QuantumScape’s solid-state lithium-metal battery technology. That chemistry has been the company’s calling card since its founding in 2010. QuantumScape says the system delivers 4x the power density and 5x the runtime of baseline metrics set by the Open Compute Project. The OCP is an industry group that publishes shared hardware specifications for data centers, so it serves as a common yardstick. Safety is the other headline claim. The company says the PowerBlock maintains thermal stability above 300 °C, compared to roughly 180 °C for conventional lithium-ion cells. That gap matters because of thermal runaway. This is the chain reaction where a battery overheats, generates more heat, and keeps escalating until something fails, sometimes dramatically. The design targets 80...