Welion’s core technology is a semi-solid-state lithium-ion battery design that combines liquid electrolyte efficiency with solid-state safety. Its chemistries include Nickel Manganese Cobalt Plus (NMC+), Nickel Manganese Cobalt (NMC), and Lithium Iron Phosphate (LFP). Cells achieve up to 360 Wh/kg energy density, support high C-rates, feature advanced thermal management, mitigate dendrite formation, and are manufactured on existing lithium-ion lines. The company dedicates 31% of its workforce to R&D and collaborates with BASF and the Yangtze River Delta Physics Research Center on solid-state electrolyte development.
Welion offers semi-solid-state battery cells for applications such as e-bikes, last-mile delivery vehicles, motorcycles, marine equipment, and portable power stations. It developed a 150 kWh battery pack for NIO’s ET7 sedan, delivering a 650-mile range. Product features include high energy density (up to 360 Wh/kg), fast charging/discharging, extended cycle life, and enhanced safety.
Supplied NIO’s ET7 sedan with a 150 kWh semi-solid-state battery pack; partnerships with Universal Transmissions GmbH; collaborations with the Yangtze River Delta Physics Research Center and BASF; plans to scale production to 30 GWh by 2025.
The company is backed by Habo Investment, Hidden Hill Capital, Hermitage Capital, Xiaomi, NIO Capital, and Huawei, having raised approximately $284.6M and targeting an IPO in 2025 to support a 20-fold revenue increase to $1.4B.
