Hithium presents 1175Ah cell: A breakthrough in long-term energy storage
Hithium Presents Breakthrough Battery Cell ∞Cell with 1175Ah Capacity at SNEC 2025 in Shanghai
During the SNEC 2025 trade fair in Shanghai, Hithium unveiled a groundbreaking solution that could significantly impact the development of long-duration energy storage systems (LDES). The new ∞Cell battery cell, with a capacity of 1175 Ah, is the world’s first commercial unit to surpass the 1000 Ah threshold. This technology opens new possibilities for grid stabilization, support of critical infrastructure, and integration of renewable energy sources.
A New Standard in the LDES Sector
The 1175Ah cell was developed in response to the growing demand for energy storage systems capable of operating for 3 to even 12 hours or more. Its development took two years, and mass production has just begun at Hithium’s facility in Chongqing.
The company overcame numerous technological challenges, including the precise coating of wide electrodes and their alignment with an accuracy of 0.5 mm. As a result, production efficiency increased by 35% while maintaining high component quality.
Safety Under Control
Hithium’s new cell features a range of safety-enhancing solutions at every level—from the structure of the individual cell, through the module, to the BMS management system. The battery chemistry has been optimized: a new electrolyte formulation supports the formation of stable SEI and CEI layers, which protect the electrodes and extend the cell’s lifespan.
Modules are equipped with special barriers to limit heat spread and oxygen flow, as well as fire detection and active suppression systems. Non-flammable materials were also used, making the construction highly resistant to extreme conditions.
First-Ever Open-Door Safety Test
Hithium also conducted a unique “All Open-Door” safety test, during which a thermal runaway event was intentionally triggered. In a controlled fire lasting 15 hours and with full fresh air access, the test examined whether flames would spread to adjacent containers. The test was successful—the temperature reached 1372°C, but the fire did not spread. The results were validated by UL Solutions, which awarded the cell UL 9540A and NFPA 855 certifications.
Economic and Environmental Benefits
The new cell not only offers greater capacity but also reduces costs. Compared to the previous 314Ah model, the unit energy cost has dropped by 7.5%, and non-battery components are up to 30% cheaper.
Hithium’s new production line—based on 5G, MES, and AI technologies—has enabled a 26% automation rate, a 30% increase in efficiency, and a 25% reduction in overall costs. Additionally, the company is implementing a sustainability strategy that covers the entire product lifecycle—from design and production to recycling.
Source: hithium.com