Dongfeng to Mass-Produce 350 Wh/kg Solid-State Battery in Sept 2026, Targets 1,000-km Range

Dongfeng will continue advancing a fast-charging 350 Wh/kg all-solid-state battery, targeting pilot vehicle installation in December 2027.

Dongfeng Motor said at the 2025 World Power Battery Conference that it has completed construction of a 0.2 GWh solid-state battery pilot line, which is now operational.

The company plans to bring a 350 Wh/kg solid-state battery into mass production in September 2026 for vehicle installation, enabling an estimated driving range of up to 1,000 km per charge.

The battery uses a multi-component composite system combining high-capacity ternary cathodes, silicon-carbon anodes and an oxide-polymer composite solid electrolyte, addressing long-standing limitations in safety and low-temperature performance associated with conventional lithium-ion batteries.

Dongfeng said the new high-energy-density solid-state cell maintains over 72% of its capacity at −30°C—well above the roughly 60% retention level of mainstream liquid-based ternary cells.

In thermal safety tests, it passed a 170°C hot-box test, significantly exceeding the Chinese national standard of 130°C.

Dongfeng also unveiled its 1,200-volt ultra-high-voltage pure-electric platform, known as the Mach Ultra-kV platform, which is built using an in-house-developed 1,700-volt silicon-carbide power module and an all-domain ultra-high-voltage electrical architecture.

The platform integrates 12C ultra-fast-charging cells and supports up to 2 MW charging through a single gun, delivering “1 second of charging for 2.5 km of range” and “450 km added in 5 minutes”, along with automated charging and seamless payment functions.

In terms of electric drive capability, the platform employs a coaxial drive system with a peak motor speed of 30,000 rpm, combined with high pack-level integration efficiency to achieve more than 1,000 km of real-world range.

Its safety measures include 1,500 J impact resistance, 48-hour thermal-runaway early-warning protection and motor excitation-fuse safeguards.

Looking ahead, Dongfeng said it will continue advancing a fast-charging 350 Wh/kg all-solid-state battery solution, targeting pilot vehicle installation in December 2027, while initiating pre-research into a sulfide all-solid-state system with energy density increased to 500 Wh/kg.