GBT starts all-solid-state battery production

On 13 October 2026, Greater Bay Technology (GBT) began full-scale production of all-solid-state battery cells at its Nansha plant near Guangzhou, China. The company repurposed an existing lithium-ion production line for this new technology, marking a significant step in the global push for next-generation batteries, especially for electric vehicles.

Initial production capacity and flexibility

GBT’s new line has an initial capacity of 1 gigawatt-hour for solid-state cells. The rest of the plant, which totals 4 gigawatt-hours, is currently used for traditional lithium-ion batteries. However, GBT says the plant can be converted to full solid-state production if demand increases, showing the company’s adaptability to market needs.

Technology and intellectual property

GBT emphasizes that its expansion does not involve building a new "gigafactory" from the ground up. Instead, it upgraded an existing line, allowing it to produce both conventional lithium-ion and all-solid-state cells. The company also produces its own solid electrolyte and several key raw materials, holding more than 50 patents related to this technology.

Innovative electrolyte design

The core of GBT’s innovation is its electrolyte. Unlike many other programs that use sulfur-based electrolytes, which are sensitive to humidity and oxygen, GBT uses an organic-inorganic composite electrolyte. This is introduced in liquid form and then solidified inside the battery, creating a flexible interface with the electrodes. Most of the production steps are done using reconverted lithium-ion equipment, with only the filling and polymerization of the precursor requiring a dry, oxygen-free environment.

Performance and regulatory compliance

GBT claims its battery platform has energy densities between 260 and 480 Wh/kg. The first generation uses tested electrode materials in a pouch format, while future versions with lithium-metal anodes are in development. The company states its cells are the first to meet the requirements of the new Chinese standard GB/T 48093.1-2026, published in August 2026 and set to take effect in January 2028. This standard defines what constitutes a true all-solid-state battery.

Safety and cycle stability

GBT mentions that its batteries passed safety tests under the standard GB 38031-2025. During a nail penetration test on a fully charged cell, no fire or explosion occurred. The company also says the cycle stability of its batteries is comparable to current lithium-ion batteries, though it has not yet provided specific figures.

Industry partnerships and future plans

GBT has announced partnerships with several companies, highlighting the potential of its technology. Hubei Liming Lithium Technology plans to use these cells in vehicles and stationary storage systems. A drone eVTOL development center in Shenzhen is also collaborating with GBT. In Europe, the utility vehicle startup Flynt is working with GBT on cell supplies, technology transfer, and possible joint ventures.