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).
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.
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.
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.
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.
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