Sunwoda and Zhongwei Partner on Solid-State EV Batteries

Chinese battery manufacturer Sunwoda Electronic Co., Ltd. has entered into a strategic cooperation framework with new-energy materials supplier Zhongwei New Materials Co., Ltd., targeting the development of high-capacity solid-state batteries for electric vehicles. The agreement, signed on December 25, 2025, will see the two companies collaborate on cathode precursor materials, cathode materials, and all-solid-state battery technology, with the goal of accelerating the industrialization of next-generation energy storage systems. Financial terms were not disclosed.

Sunwoda, which provides solutions for consumer electronics, energy storage, and smart hardware, also supplies lithium-ion cells and modules to a number of domestic automotive manufacturers. Its subsidiary, Sunwoda Power Technology Co., Ltd., will pool resources with Zhongwei to enhance R&D and pilot production capabilities in solid-state batteries. Zhongwei specializes in nickel- and cobalt-based battery materials and has accumulated research experience in solid electrolytes, cathode precursors, and related components. Its products are already being used by top Chinese automakers.

Sunwoda’s existing solid-state battery lineup includes a first-generation polymer-based all-solid-state battery with an energy density of around 400 Wh/kg, along with a 20 Ah cell that has achieved 1,200 cycles under low external pressure. The company plans to establish a 0.2 GWh pilot production line by the end of 2025, aiming to scale up to 60 Ah cells. Through this partnership, Sunwoda and Zhongwei intend to combine their technical, engineering, and manufacturing expertise to accelerate commercialization.

The collaboration emerges amid growing activity across China’s battery sector, where established players and newcomers alike are preparing or operating pilot lines for solid-state battery production. Notably, one automaker has already manufactured 60 Ah automotive-grade cells using sulfide-based solid electrolytes. Market analysts project global solid-state battery shipments could hit 614 GWh by 2030, with all-solid-state batteries making up nearly 30% of that volume.

Before moving forward, both companies will finalize formal project contracts—a step that underscores the industry-wide effort to move solid-state batteries from lab research to commercial reality.