sunwoda
China’s fast-growing battery industry has once again made headlines with Sunwoda’s latest breakthrough — the unveiling of its next-generation polymer all-solid-state battery. With the global electric vehicle (EV) market rapidly expanding and automakers racing to deliver longer range and safer batteries, Sunwoda’s new technology promises to redefine performance standards. The company’s innovation demonstrates China’s accelerating progress in the global energy storage race, positioning Sunwoda among the most competitive battery producers in the world.
Sunwoda’s Milestone Announcement
At the 2025 New Energy Battery Industry Development Conference, Sunwoda officially introduced its new solid-state battery, named “Xin·Bixiao”, symbolizing a new beginning for the company’s battery technology strategy. This polymer all-solid-state battery achieves an impressive energy density of 400 Wh/kg, while maintaining excellent safety and durability. Even under ultra-low external pressure below 1 MPa, the battery can endure 1,200 charge-discharge cycles, showcasing both strength and stability.
The announcement signals more than just a technical milestone — it represents the company’s commitment to advancing clean energy solutions for the global automotive industry. Sunwoda, listed on the Shenzhen Stock Exchange (SHE: 300207), has been actively investing in next-generation technologies to compete with major battery makers like CATL, BYD, and CALB.
The Technology Behind the Breakthrough
Sunwoda’s new solid-state battery uses a polymer-based electrolyte, replacing the flammable liquid electrolytes commonly found in lithium-ion batteries. This design significantly improves safety by minimizing risks of thermal runaway, overheating, and fire. The solid-state structure also allows for a higher energy density, meaning more power can be stored within the same volume — a key advantage for electric vehicles seeking longer range.
According to Sunwoda engineers, the company’s proprietary polymer electrolyte offers both high ionic conductivity and flexibility, addressing one of the biggest challenges in solid-state development: maintaining efficient ion movement while ensuring mechanical stability. This balance is essential for achieving consistent performance over hundreds of charging cycles.
Another highlight of the new battery is its compatibility with lithium-metal anodes, which are capable of dramatically increasing energy density beyond conventional graphite-based designs. Lithium-metal anodes have long been viewed as the “holy grail” of battery chemistry, but their high reactivity has made commercialization difficult. Sunwoda’s progress suggests that the company has developed effective ways to control these reactions, making the technology viable for large-scale production.
Pilot Production and Commercialization Plans
Sunwoda is not stopping at laboratory success. The company plans to complete a 0.2 GWh pilot production line for polymer all-solid-state batteries by the end of 2025. This facility will serve as a stepping stone toward full-scale industrial production, expected to reach 1 GWh capacity in 2026.
The transition from pilot phase to mass production is a critical step that will determine how soon automakers can integrate Sunwoda’s solid-state batteries into upcoming vehicle models. With this timeline, the first commercial EVs equipped with the new technology could appear on Chinese roads by late 2026 or early 2027.
Sunwoda is also focusing on cost reduction — one of the major challenges in solid-state battery development. The company aims to bring production costs down to RMB 2 per Wh (approximately USD 0.28/Wh) by 2026, a figure comparable to current semi-solid-state battery technologies. If successful, this cost efficiency will make solid-state batteries much more accessible to automakers and consumers alike.
Pushing Boundaries: The Lithium-Metal “Super Battery”
Beyond the 400 Wh/kg version, Sunwoda’s research team has already achieved another milestone with a lithium-metal “super battery” prototype boasting an energy density of 520 Wh/kg. This represents a major leap forward and brings Sunwoda closer to the goal of surpassing 500 Wh/kg — a benchmark often cited as the gateway to ultra-long-range electric vehicles.
At this level, electric cars could theoretically achieve ranges of 1,000 kilometers or more on a single charge, depending on vehicle design and efficiency. Such performance would rival traditional fuel-powered cars, eliminating one of the biggest psychological barriers to EV adoption: range anxiety.
Comparison with Industry Competitors
Sunwoda’s announcement comes just days after Chery Automobile unveiled an all-solid-state battery module with an energy density of up to 600 Wh/kg, claiming potential vehicle ranges of 1,200–1,300 kilometers. The close timing of these developments highlights China’s intense competition in solid-state battery innovation.
Other major players like CATL, BYD, and Gotion High-Tech are also heavily investing in similar technologies, each seeking to be the first to bring safe, affordable, and high-performance solid-state batteries to market. However, Sunwoda’s progress with polymer-based designs sets it apart, as most competitors are focusing on sulfide or oxide-based solid electrolytes, which present their own manufacturing and stability challenges.
Impact on the Electric Vehicle Industry
The implications of Sunwoda’s solid-state breakthrough extend far beyond the company itself. For the electric vehicle market, higher energy density means smaller, lighter battery packs that deliver longer range without increasing vehicle weight. This could lead to more compact EV designs, greater efficiency, and reduced production costs for automakers.
Furthermore, the enhanced safety characteristics of solid-state batteries — especially their resistance to fire and high temperatures — will make EVs more appealing to safety-conscious consumers. Manufacturers could also reduce the need for heavy cooling systems, freeing up space and improving vehicle aerodynamics.
From an environmental perspective, solid-state batteries can reduce reliance on certain volatile materials used in liquid electrolytes and potentially extend the overall lifespan of battery packs, decreasing waste and improving sustainability.
Challenges and Next Steps
Despite the optimism, commercializing solid-state batteries remains a complex challenge. Mass production requires precision manufacturing, new material supply chains, and consistent quality control. Maintaining performance in real-world conditions — including extreme temperatures and rapid charging — is still a hurdle for many prototypes.
Sunwoda’s 2026 timeline for mass production is ambitious, but achievable given China’s rapid advancements in battery manufacturing infrastructure. The company’s focus on polymer electrolytes might offer manufacturing advantages over sulfide systems, which are notoriously difficult to scale due to moisture sensitivity.
In the coming year, Sunwoda’s ability to translate laboratory results into industrially reliable products will determine its leadership position in the next generation of EV battery technology.
The Future of Solid-State Batteries
As global demand for electric vehicles accelerates, solid-state technology is viewed as the next frontier in energy storage. Governments worldwide are supporting R&D in this field, recognizing its potential to revolutionize transportation and renewable energy systems.
Sunwoda’s innovation adds fresh momentum to this global movement. If the company succeeds in delivering affordable, high-performance solid-state batteries at scale, it could redefine the balance of power in the EV industry, reducing dependency on established lithium-ion technologies and fostering a new wave of high-efficiency electric mobility.
Conclusion
Sunwoda’s unveiling of its next-generation solid-state battery marks a defining moment in the evolution of energy technology. With 400 Wh/kg energy density, 1,200-cycle lifespan, and a clear roadmap toward mass production in 2026, the company is setting a strong precedent for innovation in China’s EV supply chain. Its parallel development of a 520 Wh/kg lithium-metal prototype further cements its status as a serious contender in the race for next-generation batteries.
As Sunwoda continues to refine its technology and expand production capacity, the global electric vehicle market could soon enter a new era — one powered by safer, lighter, and more powerful solid-state batteries that bring us closer to a fully electrified future.
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