Shanghai, June 11, 2025 – At SNEC 2025, HiTHIUM, a global leader in energy storage technology, made a major announcement regarding the successful mass production of the world's first kAh battery cell—the ∞Cell 1175Ah. This breakthrough, revealed at their product safety technology sharing event titled "Leading the Future, Forged for Safety," marks the beginning of the long-duration energy storage era. The event took place at HiTHIUM’s Chongqing manufacturing base and signaled a new phase for the deployment of large-scale energy storage solutions.

Overcoming Industry Challenges: Key Innovations in kAh Battery Cell Production

HiTHIUM’s foresight and early investment in kAh battery technology, beginning in 2022, have enabled them to overcome the substantial technical barriers involved in the mass production of these cells. The company faced significant challenges in areas such as cell size, process complexity, and quality control. However, through extensive R&D, HiTHIUM has introduced several key innovations in the manufacturing process:

● Precision in Coating Process: HiTHIUM achieved a breakthrough in coating mass density, reducing the coefficient of variation (COV) to under 0.2%. The use of high-precision CCD cameras for online inspection ensures consistency and stability in product quality.

● Efficiency in Large-Electrode Stacking: The company improved electrode alignment accuracy to 0.5mm, with a 35% increase in stacking throughput, reducing the time per sheet to just 0.1625 seconds.

● Proprietary Cell Design: HiTHIUM’s unique “integrated 3D airflow top cover” design, coupled with dedicated automation equipment, ensures structural strength and stability in large-size components, overcoming longstanding industry bottlenecks.

● Optimized Back-End Manufacturing: New processes in baking, isostatic electrolyte filling, and high-rate formation have boosted back-end manufacturing efficiency by 45%.

● Advanced Wrapping Technology: A new lamination roller system reduces issues like wrinkling and bubbling in ultra-large cell packaging, ensuring greater consistency in cell wrapping.

Uncompromising Focus on Safety: A Multi-Layered Approach

With energy densities rising due to larger-capacity designs, product safety has become a non-negotiable element in the development of long-duration storage solutions. HiTHIUM’s product safety expert, Dr. Xiaoxiao Liu, explained the company’s comprehensive, multi-layered safety approach across the cell, module, and system levels:

● Cell Safety: Advanced electrolyte formulations create high-temperature-resistant SEI and CEI layers, improving both safety and cycle life.

● Module Safety: A dual-mode thermal protection structure prevents thermal propagation and oxygen ingress, enhancing system reliability.

● BMS Safety: Functional safety and cybersecurity are integrated through multimodal early warning algorithms and redundant control technologies, ensuring the stable operation of the energy storage system.

● System Safety: The system level incorporates fire-resistant and heat-insulating materials, reinforced internal frames, and intelligent fire detection and suppression systems, which proactively mitigate the risk of thermal runaway.

Accelerating Global Expansion: Backed by Industry Certifications

At the SNEC 2025 event, HiTHIUM’s ∞Cell 1175Ah was awarded UL 1973 and UL 9540A certifications by UL Solutions, a globally recognized safety authority. These certifications confirm that the battery cell meets stringent international safety standards, facilitating its entry into markets such as North America.

Additionally, HiTHIUM signed a strategic cooperation agreement with El-Mor, Israel’s leading EPC company, to launch its first long-duration energy storage project in Romania. This collaboration will accelerate the development of the local energy storage market, further extending HiTHIUM’s global reach.

Looking Ahead: A New Benchmark for Long-Duration Energy Storage

The successful mass production of the ∞Cell 1175Ah signifies HiTHIUM’s breakthrough in overcoming the complex technical and manufacturing challenges that have hindered the deployment of long-duration energy storage. As the world transitions into the era of sustainable and large-scale energy storage, HiTHIUM’s new battery cell sets a high standard, with the potential to reshape the industry. HiTHIUM, currently ranked among the top three global companies in energy storage battery shipments, continues to lead with its innovative and safety-driven approach to energy storage.

This development heralds a bright future for long-duration energy storage, and HiTHIUM is poised to remain at the forefront of this transformative technology.