BYD supplier Sunwoda to develop 60 Ah solid-state EV cells with Zhongwei
Sunwoda Electronic Co., Ltd and Zhongwei New Materials Co., Ltd signed a strategic cooperation framework agreement on December 25, 2025, to jointly develop materials for solid‑state batteries, according to NBD. The agreement covers the development of cathode precursor materials and cathode materials, and collaboration on full-solid-state battery technologies, aiming to advance the industrialization of new energy battery materials. No financial terms were disclosed.
Sunwoda is a Chinese battery manufacturer active in consumer electronics, power storage, and intelligent hardware. In the automotive sector, Sunwoda supplies lithium-ion battery cells and modules to several domestic automakers, including BYD, SAIC, and GAC Group. Its subsidiary, Sunwoda Power Technology Co., Ltd., agreed with Zhongwei to strengthen its capabilities in next-generation solid-state battery technologies.
Zhongwei is a leading new-energy materials company that produces nickel- and cobalt-based products widely used in electric vehicle batteries. Its materials are supplied to major Chinese automakers, including CATL, BYD, and Farasis. Zhongwei has focused research on solid-state battery electrolytes, developing capabilities across precursors, cathode materials, and solid electrolytes.
Sunwoda’s existing solid-state technology includes its first-generation polymer-based all-solid-state battery, with an energy density of approximately 400 Wh/kg and a 20 Ah cell that achieved 1,200 cycles under low external pressure. The company planned to have a 0.2 GWh pilot production line operational by the end of 2025 to support larger 60 Ah cells.
The cooperation aims to integrate technical, engineering, resource, and production capabilities between Sunwoda and Zhongwei. Both parties intend to leverage their combined competencies in development, production, and supply to accelerate the commercialization of solid-state batteries.
The agreement aligns with broader industry developments. In 2025, multiple Chinese battery companies, including CATL, Funeng Technology, and Qingtao Energy, will have established or planned pilot production lines for solid-state batteries. GAC has already produced automotive-grade 60 Ah cells using sulfide solid electrolytes, signaling a shift toward near-term industrialization. Industry analysts project that by 2030, global solid-state battery shipments could reach 614 GWh, with nearly 30 percent of those being all-solid-state batteries.
Formal contracts specifying project implementation are required before cooperation proceeds. Sunwoda and Zhongwei’s agreement is positioned within the ongoing industry effort to move solid-state batteries from laboratory development to commercial production.
