Dongfeng Motor said it plans to start mass production of solid-state batteries with an energy density of 350 Wh/kg in September 2026, a development the company expects will enable electric vehicles to reach driving ranges of up to 1,000 kilometers. The announcement follows the commissioning of a 0.2 GWh pilot production line, the company said in a statement.
The update was presented during the 2025 World Power Battery Conference in Yibin, Sichuan, where Dongfeng unveiled next-generation battery technologies, a pure-electric platform operating above 1,000 volts, and several new energy vehicle models. The company said the 350 Wh/kg variant had already reached pilot production, while higher-density versions targeting 400 Wh/kg and 500 Wh/kg remain under development.
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Dongfeng referred to the 350 Wh/kg units as solid-state batteries, though one image accompanying the announcement suggested they may be semi-solid-state. Recent reports from local media have indicated that regulators are drafting a unified designation of “solid-liquid batteries” for semi-solid-state designs to avoid consumer confusion.
The company said it is also working on 350 Wh/kg all-solid-state batteries with fast-charging capability, with pilot production planned for December 2027. Additional research is underway on 500 Wh/kg sulfide-based all-solid-state cells.
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At the Yibin event, Dongfeng highlighted improvements in low-temperature performance and safety. The 350 Wh/kg battery retains more than 72% of its energy at -30°C, compared with around 60% for conventional liquid ternary batteries, the company said. It also reported passing a 170°C thermal box safety test — a level the company noted “far exceeds the national standard requirement of 130°C.”
The automaker also showcased a 1,200-volt ultra-high-voltage pure-electric platform featuring its in-house–developed 1,700-volt silicon carbide modules. According to the company, the system can deliver “2.5 kilometers of range in one second of charge and 450 kilometers in five minutes” when used with 12C battery cells and a 2-MW charger.
