Hithium Launches Mass Production of Groundbreaking kAh Battery Cell, Paving the Way for Long-Duration Energy Storage Solutions

Hithium Pioneers Mass Production of the World’s First kAh Battery Cell, Accelerating Scaled Deployment of Long-Duration Energy Storage
============================================================================================

On June 11, 2025, at SNEC 2025, Hithium, a leading global energy storage technology company, hosted a product safety technology sharing event themed “Leading the Future, Forged for Safety.” During this event, they announced the successful mass production of the world’s first kAh battery cell—∞Cell 1175Ah—at their manufacturing facility in Chongqing. This milestone marks the onset of a new phase in the scaled deployment of long-duration energy storage.

### Overcoming Challenges in Production

Hithium has been ahead of the curve, predicting the rise of long-duration energy storage and investing in the research and development of kAh battery cells as early as 2022. The company faced significant challenges related to size, process complexity, and quality control. However, they have achieved five key innovations across their entire manufacturing chain at the Chongqing facility:

– **Breakthrough in Wide-Width Thick Coating Precision**: Achieved a coating mass density COV of less than 0.2%, utilizing high-precision CCD cameras for online inspection, ensuring consistent and stable product quality.

– **Enhanced Efficiency in Large-Electrode Stacking**: Achieved 0.5mm alignment accuracy and a stacking speed of 0.1625 seconds per sheet, increasing throughput by 35% compared to traditional methods.

– **Original Cell Structure Design**: Introduced a proprietary “integrated 3D airflow top cover” structure, supported by dedicated automation equipment to ensure manufacturing stability and structural integrity of large-size components, effectively breaking industry bottlenecks.

– **Improved Back-End Cell Manufacturing Efficiency**: Developed high-efficiency baking processes, 1.2MPa high-pressure isostatic electrolyte filling, and high-rate formation and grading methods, enhancing back-end manufacturing efficiency by 45%.

– **Greater Consistency in Cell Wrapping**: Implemented a highly compatible flexible lamination roller system to address common industry issues such as wrinkling and bubbling in ultra-large cell packaging.

### Establishing a New Industry Standard for Full-Lifecycle Safety

As energy density increases with larger-capacity designs, product safety remains a fundamental priority. During the event, Dr. Xiaoxiao Liu, Hithium’s product safety expert, outlined the multi-level safety architecture integrated across the cell, module, and system levels to ensure full-lifecycle safety for large-capacity energy storage systems.

– At the **cell level**, advanced electrolyte formulations create high-temperature-resistant SEI and CEI layers, enhancing both safety and cycle life.

– At the **pack level**, a dual-mode thermal protection structure prevents thermal propagation and oxygen ingress.

– At the **BMS level**, functional safety and cybersecurity are reinforced through multimodal early warning algorithms and redundant control technologies, ensuring stable and secure system operation.

– At the **system level**, multi-layer fire-resistant and heat-insulating materials, along with a reinforced internal frame and intelligent fire detection and suppression systems, work collaboratively to maintain structural integrity and proactively prevent thermal runaway.

### Accelerating Global Expansion with Authoritative Certifications

At SNEC 2025, Hithium’s ∞Cell 1175Ah received UL 1973 and UL 9540A certifications from UL Solutions, a globally recognized safety authority. These certifications confirm that the ∞Cell 1175Ah meets international safety standards, paving the way for its entry into the North American market. Additionally, Hithium signed a strategic cooperation agreement with El Mor, a leading EPC company in Israel, to launch their first long-duration energy storage project in Romania, further accelerating the development of the local long-duration energy storage market.

The successful mass production of the world’s first kAh battery cell highlights Hithium’s capability to overcome industry challenges in both research and development and manufacturing. As the world transitions into an era of long-duration energy storage, the ∞Cell 1175Ah is set to establish a new benchmark in the market. With a ranking among the top three companies in global energy storage battery shipments, Hithium continues to lead the industry as an innovation-driven value creator.