Chinese battery manufacturer Gotion High-Tech, backed by Volkswagen, has reached a pilot-scale production milestone for its self-developed all-solid-state Jinshi Battery and initiated design work for a 2 GWh mass production line. This move represents a significant step toward large-scale industrialization of solid-state battery technology in China.
Unveiled in May 2024 after eight years of development, the Jinshi Battery employs a sulfide-based solid electrolyte and integrates material innovations such as micronized electrolytes, ultra-thin coated single-crystal cathodes, and three-dimensional mesoporous silicon anodes. The cell delivers an energy density of 350 Wh/kg—around 40 percent higher than mainstream ternary lithium batteries—and has passed rigorous safety tests including 200 °C thermal chamber exposure, nail penetration, and crush testing.
Gotion’s first 0.2 GWh pilot line has achieved 100 percent localization of key production equipment and maintains a stable 90 percent yield rate. The company reports a 60 percent increase in ionic conductivity of its sulfide electrolyte and a 90 percent reduction in cell preload pressure, enhancements that improve manufacturing consistency. After a year of endurance validation, cell capacity has risen by 150 percent compared with initial prototypes.
In performance evaluations, the Jinshi cell supports more than 3,000 charge cycles and is projected to exceed a one-million-kilometer lifespan. At the pack level, energy density reaches 280 Wh/kg, enabling an estimated 1,000 km driving range per charge with stable operation from −20 °C to 85 °C. Prototype vehicles outfitted with these cells have already logged over 10,000 km in on-road testing.
While Gotion has not disclosed investment amounts or construction timelines for the 2 GWh line, analysts estimate costs of 1.5 to 2 billion yuan per GWh based on comparable semi-solid battery projects. The company targets small-scale vehicle integration by 2027 and broader mass production by 2030.
Gotion is also collaborating with eVTOL developer EHang to apply its solid-state technology to low-altitude aircraft. Industry observers note that these advancements could narrow China’s gap with leading Japanese and Korean competitors, although large-scale commercialization will depend on effective cost control and improved interface stability.
Source: Car News China
