Li Auto Solid-State Batteries Target Limited Use by 2027

Li Auto Solid-State Batteries could reach limited vehicle deployment in 2027 or 2028, although mature mass production for automotive applications is expected to remain several years away. Chinese media outlet Cailian reported the timeline on Tuesday, citing an insider at Li Auto. The company has multiple solid-state battery projects underway and has already validated prototypes in eyewear products, according to Liu Zhimin, Li Auto’s senior director of power batteries. Liu said the remaining challenge is achieving mature vehicle production while maintaining a consistent and reliable user experience, indicating that limited deployment and broad commercial availability remain distinct development stages.

Li Auto Targets Limited Solid-State Battery Deployment

Li Auto’s current development timeline points to a limited vehicle application window of 2027 or 2028 rather than immediate large-scale commercialization. Liu said achieving mature mass production for vehicles while maintaining a consistent user experience could require another five years. The distinction is important because limited deployment can involve a smaller number of vehicles used to validate technology, manufacturing processes and performance before broader production begins. Li Auto’s work therefore suggests that reaching vehicles within the next two years would represent an intermediate development milestone, not evidence that solid-state batteries will be widely installed across its production lineup at that time.

Battery Performance And Cost Remain Key Challenges

Liu identified several technical requirements that still need to be addressed simultaneously, including battery lifespan, charging performance and cost. These factors can determine whether solid-state technology moves successfully from validated prototypes into practical automotive applications. Li Auto has several solid-state battery projects under development as part of its broader effort to strengthen internal battery capabilities. The company began developing battery cells in-house in 2020, with its work covering 5C cells, battery packs and battery management systems. Its stated development scope indicates an approach that extends beyond cell chemistry to the broader battery system required for vehicle integration.

Livis Glasses Provide An Early Technology Application

Li Auto has already used solid-state battery technology in prototype applications outside its vehicle lineup. The company launched Livis smart glasses in December 2025, although it did not emphasize the product’s use of solid-state batteries when the device was introduced. Liu’s comments indicate that validated eyewear prototypes are part of the company’s continuing battery research and development work. This application provides an earlier technology validation point while the company continues addressing the more demanding requirements associated with automotive batteries, where durability, charging characteristics, cost and consistent performance must be demonstrated at a larger scale.

In-House Battery Development Expands Across Li Auto

Li Auto’s solid-state research is connected to a wider strategy of developing battery technology internally and expanding its control over battery-related capabilities. The company said on September 7 that its in-house developed batteries were already being used in the Li L8, Li L6 and Li i8, with deployment planned to gradually extend across its lineup. The company’s internal battery work began in 2020 and includes cells, packs and battery management systems. This broader development effort provides a foundation for Li Auto to continue integrating battery technologies into vehicles as different technologies reach the required level of validation and production readiness.

Sunwoda Partnership Strengthens Battery Manufacturing

Li Auto’s batteries are produced through a joint venture established in 2025 with Sunwoda, with each company holding a 50% stake. The relationship also includes a growing financial connection between the two companies. Sunwoda disclosed on September 4 that Li Auto planned to invest in Sunwoda Electric Vehicle Battery Co Ltd, which would give Li Auto a direct 8.79% stake upon completion and make it the company’s second-largest single shareholder. The arrangement links Li Auto’s internal battery development efforts with a manufacturing partner while giving the automaker a direct ownership interest in the battery business involved in its supply chain.

Chinese Industry Reaches Similar Solid-State Milestones

Other companies in China are also targeting important solid-state battery milestones around 2027, although vehicle validation, limited deployment and large-scale commercialization remain separate stages. Chery Auto said on September 3 that it planned to begin vehicle validation of all-solid-state batteries in 2027, while solid-liquid hybrid batteries were scheduled for vehicle installation in the fourth quarter of 2026 as a transitional solution. These timelines show that automakers are progressing toward vehicle applications while continuing to use intermediate technologies and validation programs before attempting broader commercialization.

CATL Continues Work Toward Small-Batch Production

CATL has also identified 2027 as an important point for solid-state battery development. Chief scientist Wu Kai said in 2024 that the company aimed to reach the technical readiness required for small-batch production of all-solid-state batteries in 2027, while noting that large-scale production would continue to face challenges such as cost. CATL chairman Robin Zeng said in June this year that solid-state battery technology was only at level 4 on a scale from level 1 to level 9, with level 9 representing readiness for mass production. These comments reinforce the gap between technical progress and full commercialization.

Industry Impact & Outlook

Li Auto’s timeline highlights how solid-state batteries are progressing toward automotive applications while remaining constrained by durability, charging performance, cost and manufacturing readiness. For automakers and battery suppliers in China, the next phase is likely to center on vehicle validation, limited deployment and gradual expansion before larger production programs can be justified. Li Auto’s battery partnership with Sunwoda also connects technology development with manufacturing capacity and supply-chain planning. If the company reaches limited vehicle deployment in 2027 or 2028, the milestone would provide another practical validation point for solid-state technology, while mature mass production would still depend on resolving the technical and economic requirements identified by company executives.

Frequently Asked Questions

When could Li Auto deploy solid-state batteries in vehicles?
Li Auto is expected to have solid-state batteries ready for limited vehicle deployment in 2027 or 2028, according to a Cailian report citing a company insider. This timeline represents a limited application stage rather than broad production across the automaker’s lineup. Li Auto senior director Liu Zhimin said mature automotive mass production while maintaining a consistent user experience could take another five years. The company continues working on multiple solid-state battery projects while addressing lifespan, charging performance and cost requirements before the technology can reach wider vehicle use.