Dongfeng Motor has announced the establishment of a fully independent and self-controlled solid-state battery supply chain, marking a major milestone in China’s electric vehicle battery technology.
The company said it has achieved breakthroughs in critical components including electrolytes, separators, and in-situ solidification processes, strengthening its position in the next-generation EV battery race.
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Dongfeng has developed two solid-state battery products offering energy densities of 240 Wh/kg and 350 Wh/kg, capable of supporting driving ranges exceeding 1,000 km. These batteries combine high energy density with robust safety performance, having successfully passed China’s mandatory GB38031-2020 safety standards and endurance tests involving puncture, 50% compression deformation, and sustained exposure to 150°C heat.
The company began its solid-state battery research in 2018, establishing a specialized project team focused on both cell-level and system-level innovations. Its first-generation solid-state battery system was completed in 2019, with the first prototype vehicle following in 2020.
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In 2022, Dongfeng partnered with a major battery manufacturer to co-develop a high-energy-density system later integrated into the Dongfeng E70 sedan. The initial batch of 50 demonstration vehicles has since logged over 1.5 million kilometers across six provinces and ten cities.
At the 2024 World Power Battery Conference, Dongfeng showcased its latest solid-state battery system with an energy density of 285 Wh/kg, featuring a cell-to-pack (CTP) structure for improved space utilization and reduced costs.
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The design also incorporates immersive liquid cooling and a wireless battery management system (BMS) to boost reliability and thermal efficiency. With these developments, Dongfeng aims to strengthen its foothold in solid-state technology — a key frontier in the evolution of next-generation electric vehicles.
Source: Chinaevhome
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