Eve Energy has started mass production of all-solid-state batteries as it inaugurated a new manufacturing base in Chengdu, Sichuan province, on September 2. The company said its “Longquan II” solid-state cell, designed for humanoid robots, low-altitude drones, and high-end AI equipment, rolled off the production line the same day.
The Chengdu base covers 11,000 square meters and will be built in two phases. The first phase, scheduled for completion by December 2025, will produce 60-Ah batteries. The second phase, set for December 2026, is expected to provide an annual capacity of 100 MWh, according to Eve Energy. At full operation, the facility will be able to produce nearly 500,000 cells per year.
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. Eve Energy said it aims to reach 400 Wh/kg and 1,000 Wh/L by 2025 through continued investment in research, equipment, and resources. “The launch of this cell marks a crucial step in advancing the industrialization of solid-state batteries,” the company said in a statement.
Eve Energy has previously disclosed that it is pursuing sulfide and halide electrolyte routes for its solid-state technology. In June 2024, Zhao Ruirui, executive vice president of the company’s research institute, said the firm expected to begin supplying all-solid-state batteries for hybrid vehicles in 2026.