Chinese battery manufacturer Sunwoda has launched a new generation of polymer all-solid-state batteries, adding momentum to China’s push toward commercializing next-generation energy storage systems.
The company introduced its new “Xin·Bixiao” polymer all-solid-state battery at the 2025 New Energy Battery Industry Development Conference, according to a report by local media outlet Yicai. The battery achieves an energy density of 400 Wh/kg and maintains a cycle life of 1,200 cycles under ultra-low external pressure below 1 MPa, the report said.
Sunwoda plans to complete a 0.2 GWh pilot production line for polymer solid-state cells by the end of 2025. The company has also developed and tested lithium metal super battery prototypes with an energy density of 520 Wh/kg, Yicai reported.
The announcement comes as Chinese automakers and suppliers accelerate solid-state battery development. On October 18, Chery Automobile unveiled an all-solid-state battery module with a cell energy density of up to 600 Wh/kg, capable of providing an EV range between 1,200 and 1,300 kilometers. Chery plans to start vehicle integration testing in 2027.
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Previously, Sunwoda said it had developed 20 Ah all-solid-state batteries exceeding 400 Wh/kg in energy density and was building a 1 GWh production line expected to start mass production in 2026. The company aims to produce laboratory samples exceeding 700 Wh/kg by 2027 and to reduce the cost of polymer-based all-solid-state batteries to RMB 2 ($0.28) per Wh by 2026, bringing them closer in cost to semi-solid-state batteries.
