Sunwoda Unveils Next-Gen 400 Wh/kg All-Solid-State Battery

On October 23rd, at the 2025 New Energy Battery Industry Development Conference, Sunwoda unveiled its polymer composite all-solid-state battery, the "Xin · Bixiao".

This battery achieves an energy density of 400 Wh/kg. It boasts a cycle life of 1,200 cycles under an ultra-low external pressure of <1 MPa, successfully balancing high energy with long lifespan. Its operating temperature range covers -30°C to 60°C, maintaining over 80% of its capacity even in low-temperature environments of -20°C. Furthermore, the battery has passed rigorous safety tests including nail penetration and a 200°C hot box test, effectively addressing the thermal runaway risks associated with traditional lithium-ion batteries.

Sunwoda Power has been investing in solid-state battery development for years. The company has established a corresponding development roadmap, considering factors like technological maturity and industrialization difficulty, with related technologies being developed separately and introduced step-by-step.

According to its plan, Sunwoda has mapped out four generations of solid-state batteries. The first generation is a semi-solid-state battery, development of which is now complete, achieving an energy density of >300 Wh/kg. The second generation, also semi-solid-state, has cell samples currently undergoing pilot-scale testing. The third generation is the polymer composite all-solid-state battery, for which the 400 Wh/kg product design and manufacturing process have already been verified. The fourth generation, a full solid-state battery, is currently under development.

Thus, the newly released "Xin · Bixiao" represents this third-generation polymer composite all-solid-state battery. According to the plan, Sunwoda expects to establish a 0.2 GWh polymer solid-state cell production line by the end of 2025.

Additionally, Sunwoda has successfully trial-produced lithium metal batteries with an energy density reaching 520 Wh/kg.

Beyond the frontier of solid-state batteries, Sunwoda has also entered the aviation battery sector, adopting high-nickel, high-silicon, and semi-solid/solid-state technology routes. Product naming in this line also follows the "Xin · " pattern.

Among these, the first-generation aviation power battery, "Xin · Yunxiao 1.0" (energy density ≥320 Wh/kg, supporting 6C discharge), is already in mass production. It has been installed in hundred-kilogram class aircraft and successfully completed a hundred-kilometer flight verification.

In terms of product iteration, Sunwoda continues to break new ground. In May of this year, it launched the "Xin · Yunxiao 2.0" product, which achieves an energy density of 360 Wh/kg and introduces innovative "soft solid-state" battery technology. This product combines high specific energy, high power, high safety, and a wide operating temperature range, making it suitable for various scenarios including urban air mobility, agricultural plant protection, emergency rescue, and material transport, providing reliable power support for low-altitude aircraft.

Simultaneously, catering to different application scenarios, Sunwoda has also developed two major technology platforms: pouch and large cylindrical cells. The large cylindrical battery, through designs like thermoelectric separation and directional pressure relief, meets the fast-charging and fast-discharging needs of aircraft, achieving an 80% state-of-charge (SOC) replenishment in just 10 minutes.

Looking ahead, Sunwoda has clearly defined a five-generation technology upgrade roadmap for the low-altitude power sector, with plans to achieve a breakthrough of over 500 Wh/kg in all-solid-state battery energy density by 2027.