SVOLT's Semi-Solid-State Battery B-Sample Rolls Off the Production Line, Achieving Mass Production with the World's First Membrane Transfer Technology

2025-09-26 | Calvin

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

SVOLT claims that, with its self-developed electrolyte thermal composite transfer process, it has successfully overcome the core challenge of industrializing semi-solid-state batteries, making it the best solution for large-scale mass production. This technology uses a polarity-changing adhesive liquid and a contouring gradient thermal pressing technique to achieve high-efficiency transfer of the electrolyte coating, improving the transfer rate from 20% to over 95%. Compared to traditional methods, the honeycomb technology does not require modifications to existing production lines, is compatible with current equipment, and significantly enhances production yield and consistency while improving safety performance by 50%.

The company also stated that the semi-solid-state battery that rolled off the production line has achieved a 100% non-thermal propagation safety breakthrough. It has passed several rigorous safety tests, including puncture, thermal box, extrusion, and seawater immersion tests, and has now been selected for use in European luxury car models. The second-generation semi-solid-state battery will have an energy density of 360Wh/kg and has been successfully integrated into a state-owned enterprise eVTOL (electric vertical take-off and landing) project, with sample units already delivered for testing. Future developments aim to achieve semi-solid-state batteries with energy densities of 400Wh/kg and higher to meet the demands of high-end electric vehicles, low-altitude economy, and other diverse scenarios.

SVOLT is confident in the "Semi-Solid-State Battery Mass Production - Higher Energy Density Semi-Solid-State - All-Solid-State" technological evolution pathway. It has already built the world's largest dedicated 2.3GWh semi-solid-state production line, with mass production expected to begin in November 2025. Full-scale delivery is slated to be achieved by 2027.