WeLion New Energy and its semi-solid-state batteries

Beijing-based WeLion New Energy is advancing battery technology with its semi-solid-state cells, designed to offer higher energy density and improved safety compared to traditional lithium-ion batteries. By utilizing a hybrid electrolyte, the company aims to overcome the manufacturing hurdles associated with fully solid-state designs. In 2023, WeLion partnered with Nio to deploy a 360 Wh/kg battery pack, enabling electric vehicles to achieve ranges exceeding 1,000 kilometers. Despite these technical milestones, the company faces significant challenges regarding production costs and scalability in a competitive market. WeLion is currently expanding its applications to include drones and cargo ships, with plans to launch a 410 Wh/kg drone battery by the end of 2026 and an all-solid-state battery for electric vehicles by 2027. While laboratory results show promise, including a 2025 prototype reaching 824 Wh/kg, long-term performance data remains limited as the company works toward commercial viability.