The all-solid-state battery cell achieves an energy density of up to 300 Wh/kg or 700 Wh/L.
Eve Energy is constructing a solid-state battery production base in Chengdu, targeting an annual capacity of 100 MWh by December 2026.

Eve Energy has rolled out all-solid-state batteries for humanoid robots and flying cars, as the battery giant opened a new mass production base in Chengdu, Sichuan, southwest China.
The company's solid-state battery production base in Chengdu was officially inaugurated on September 2, with the "Longquan II" all-solid-state battery cell rolling off the production line that same day, according to a statement released today.
The production base covers a total area of about 11,000 square meters and will have an annual production capacity of nearly 500,000 cells upon full operation.
The facility will be constructed in two phases. Phase one, scheduled for completion in December 2025, will have the capacity to manufacture 60-Ah batteries.
Phase two is scheduled to achieve an annual production capacity of 100 MWh by December 2026, according to Eve Energy.
The "Longquan II" is a 10-Ah all-solid-state battery cell with an energy density of up to 300 Wh/kg or 700 Wh/L, primarily targeting humanoid robots, low-altitude unmanned aerial vehicles, and high-end AI equipment.
The cell's production launch marks a crucial step forward for Eve Energy in solid-state battery industrialization, the company stated.
Eve Energy will pursue multi-path development through its "Longquan" series batteries to advance technological iteration, the company said.
Eve Energy will fully commit financial, equipment, and R&D resources to achieve an energy density of 400 Wh/kg and 1000 Wh/L for solid-state batteries by 2025, it said.
This marks one of the rare occasions in recent years where Eve Energy has provided detailed updates on its solid-state battery progress.
In June 2024, Zhao Ruirui, executive vice president of Eve Energy's research institute, mentioned at a lithium battery industry forum that the company had selected sulfide and halide solid-state electrolyte technology routes for its solid-state batteries.
The battery manufacturer expects to launch all-solid-state batteries in 2026, initially targeting hybrid vehicles, she said at the time.
Eve Energy ranks among the world's largest battery manufacturers, with EV battery shipments totaling 17.4 GWh from January to July and ranking ninth globally with a 2.9 percent market share, according to data released by South Korean market research firm SNE Research on September 2.
