The Chinese manufacturer presented a near-series solid-state battery: according to Chinese media reports, Sunwoda presented the ‘Xin Bixiao’ battery with an energy density of 400 Wh/kg and a service life of 1,200 cycles at a conference. The associated pilot line is also expected to be online by the end of the year.
Earlier this week, Chinese car manufacturer Chery unveiled its first self-developed solid-state battery module, citing an energy density of 600 Wh/kg at the cell level for the battery prototype. Chery announced that it plans to start pilot operations in 2026 and aims for a broader market launch in 2027. Sunwoda is the next Chinese player to position itself in this future market. At the New Energy Battery Industry Development Conference 2025, the company presented a solid-state battery with an energy density of ‘only’ 400 Wh/kg, but it is said to be close to series production and will roll off its own pilot production line at the end of the year. The CN EV Post portal, among others, puts the annual production capacity at 200 megawatts.
Sunwoda’s solid-state battery is a battery with a polymer electrolyte. As is well known, other variants are possible, such as solid-state batteries with sulphide or oxide electrolytes. In terms of performance, the ‘Xin Bixiao’ battery is said to have an energy density of 400 Wh/kg and a service life of 1,200 cycles (‘at extremely low external pressure below 1 MPa’). According to earlier statements by Xu Zhongling, vice president of research and development at the battery manufacturer, these are battery cells with a capacity of 20 Ah.
Sunwoda is not developing solid-state batteries on its own. At the end of 2024, the company announced that it had teamed up with materials specialist XTC. Sunwoda expects the use of XTC’s new materials to further increase the energy density and safety of its batteries. The innovations being tested since the cooperation agreement was signed include ‘highly stable electrolyte films’ and ‘dendrite-free lithium metal anodes’.
According to its own statements, Sunwoda has long since completed the development of first-generation semi-solid batteries with an energy density of 300Wh/kg and announced in 2024 that it is currently working on a second generation of semi-solid batteries with a density of 400Wh/kg. At the same time, Sunwoda has been working on a fully solid-state battery with an energy density of 400 Wh/kg, which has now been unveiled – and is already developing the next generation with a density of 520 Wh/kg, according to Chinese media reports.
cnevpost.com
