Chinese automaker Dongfeng Motor has revised its timeline for mass-producing solid-state batteries, pushing the launch back to 2027. The company had previously aimed for September 2026, but internal evaluations and ongoing research have led to this adjustment.
Initial Plans and Subsequent Revision
In late 2025, Dongfeng announced plans to begin mass production of solid-state batteries with an energy density of 350 Wh/kg, supported by a 0.2 GWh pilot production line. However, recent inspections by the Dongfeng Motor Corporation’s external directors at the solid-state battery plant prompted a reassessment of this schedule.
The delay stems from continued refinement of key aspects including technical feasibility, cost-effectiveness, and the overall pace of industrialization. Despite this postponement, Dongfeng has made significant progress, developing liquid-solid-state batteries using new electrolyte membrane composite technology that promises to extend the range of electric vehicles.
Technical Specifications and Performance
The solid-state battery in development achieves an energy density of 350 Wh/kg, utilizing a ternary cathode, silicon-carbon anode, and oxide polymer composite solid electrolyte. Testing has demonstrated strong performance even in extreme conditions: retaining 72% of its capacity at -30°C and passing thermal safety tests at 170°C.
The development of solid-state batteries is crucial for the next generation of EVs, offering improvements in energy density, safety, and charging speed. Dongfeng’s revised timeline reflects a commitment to delivering a production-ready technology, rather than rushing to market with an incomplete solution.
Integration with Mach Super-kV Platform
These batteries are intended for integration into Dongfeng’s Mach Super-kV Pure-Electric Platform, which features a 1,200 V architecture, a 1,700 V SiC power module, and a 2 MW single-connector charging capability. The platform is designed to enable rapid charging: an EV can gain 2.5 km of range in just one second. The system also supports a high-performance e-motor capable of 30,000 rpm and a peak range exceeding 1,000 km.
The company has showcased the Dongfeng eπ 007 sedan equipped with a solid-state battery during the delegation visit. The vehicle has been tested on-site by the company’s external directors.
Ultimately, Dongfeng’s decision to delay solid-state battery production underscores the complexities of commercializing this advanced technology. The company is prioritizing a thorough and reliable launch, ensuring that the final product meets performance and safety standards while remaining economically viable.
