HiTHIUM Pioneers Mass Production of World's First Kiloampere-Hour Battery Cell, Ushering in Era of Scaled Long-Duration Energy Storage

Shanghai, June 11, 2025 — At SNEC 2025, HiTHIUM, a global leader in energy storage technology, announced the successful mass production of the world's first kiloampere-hour (kAh) battery cell—the ∞Cell 1175Ah—at its Chongqing manufacturing base. The milestone, revealed during HiTHIUM's "Leading the Future, Forged for Safety" technology forum, accelerates the transition to large-scale deployment of long-duration energy storage (LDES).

Overcoming Core Technical Barriers  

Anticipating the LDES era, HiTHIUM invested in kAh cell R&D as early as 2022. Facing unprecedented challenges in size, process complexity, and quality control, the company achieved five key innovations across its manufacturing chain:  

- Precision Thick-Coating Technology: Achieved coating mass density COV <0.2% using high-precision CCD cameras for real-time inspection.  

- High-Speed Electrode Stacking: Reached 0.5mm alignment accuracy at 0.16 seconds per sheet, boosting throughput by 35%.  

- Proprietary Cell Structure: Patented "integrated 3D airflow top cover" design with automated production ensures structural integrity.  

- Enhanced Back-End Processes: High-efficiency baking, 1.2MPa isostatic electrolyte filling, and optimized formation increased back-end efficiency by 45%.  

- Advanced Wrapping: Flexible lamination rollers eliminated wrinkling/bubbling in ultra-large cell packaging.  

Redefining Full-Lifecycle Safety  

As energy density rises, safety remains non-negotiable. Dr. Xiaoxiao Liu, HiTHIUM's safety expert, detailed the multi-tiered protection:  

- Cell Level: Advanced electrolyte formulations enable heat-resistant SEI/CEI layers.  

- Pack Level: Dual-mode thermal barrier prevents propagation and oxygen ingress.  

- BMS Level: Functional safety + cybersecurity via AI algorithms and redundant controls.  

- System Level: Fire-resistant materials, reinforced frames, and intelligent suppression systems.  

Global Expansion with Authority Backing  

The ∞Cell 1175Ah received UL 1973 and UL 9540A certifications from UL Solutions at SNEC 2025, validating global safety compliance and enabling North American market entry. Concurrently, HiTHIUM signed a strategic agreement with Israel's top EPC firm, El-Mor, to deploy its first LDES project in Romania.  

Industry Leadership  

As a top-3 global storage battery supplier, HiTHIUM's breakthrough in mass-producing kAh cells cements its role in advancing LDES technology. The ∞Cell 1175Ah sets a new benchmark as markets worldwide accelerate toward long-duration storage solutions.