SVOLT Achieves B-Sample Milestone for Semi-Solid-State Battery, Pioneering Mass Production with World's First Membrane Transfer Tech

On September 16, SVOLT held a ceremony in Wuxi to mark the rollout of its semi-solid-state battery B-sample. According to the official announcement, this battery utilizes the world’s first "electrolyte thermal composite transfer process." Without compromising performance, safety, or energy density, it offers the lowest-cost and most scalable semi-solid-state solution available for mass production in the industry.

SVOLT states that its self-developed electrolyte thermal composite transfer process has successfully overcome the core challenge of industrializing semi-solid-state batteries, positioning it as the optimal solution for large-scale manufacturing. This technology uses a polarity-changing adhesive liquid and a contouring gradient thermal pressing method to achieve highly efficient transfer of the electrolyte coating, increasing the transfer rate from 20% to over 95%. Unlike conventional approaches, the honeycomb-based technology requires no modifications to existing production lines, maintains compatibility with current equipment, and significantly boosts production yield and consistency—all while enhancing safety performance by 50%.

The company also announced that the newly launched semi-solid-state battery has achieved a 100% non-thermal propagation safety breakthrough. It has passed multiple rigorous safety tests, including puncture, thermal chamber, extrusion, and seawater immersion tests, and has now been selected for integration into European luxury vehicle models. The second-generation semi-solid-state battery will feature an energy density of 360Wh/kg and has already been successfully incorporated into a state-owned enterprise’s eVTOL (electric vertical take-off and landing) project, with test samples delivered. Future development targets semi-solid-state batteries with energy densities of 400Wh/kg and beyond, designed to meet the needs of high-end electric vehicles, the low-altitude economy, and other diverse applications.

SVOLT expresses strong confidence in its technology roadmap: "Semi-Solid-State Battery Mass Production → Higher Energy Density Semi-Solid-State → All-Solid-State." The company has already established the world’s largest dedicated 2.3GWh semi-solid-state production line, with mass production scheduled to begin in November 2025. Full-scale delivery is expected to be achieved by 2027.