Hithium, a prominent global energy storage technology company, held a product safety technology sharing event with the theme “Leading the Future, Forged for Safety” at SNEC 2025 on June 11, 2025. The company also announced that its Chongqing manufacturing base had successfully mass produced the world’s first kAh battery cell, ∞Cell 1175Ah. This signals the start of a new stage in which long-duration energy storage begins to be used on a larger scale.
Overcoming Core Technical Barriers to Achieve First kAh Battery Cell Mass Production
Hithium invested in the research and development and production of kAh battery cells as early as 2022, correctly predicting the dawn of the long-duration energy storage era. In the face of previously unheard-of difficulties with scale, process complexity, and quality control, Hithium has implemented five significant improvements throughout the Chongqing manufacturing base’s whole supply chain:
- Breakthrough in wide-width thick coating precision: Achieved a coating mass density COV of less than 0.2%, with online inspection through high-precision CCD cameras, ensuring consistent and stable product quality.
- Enhanced efficiency in large-electrode stacking: Reached 0.5mm alignment accuracy and 0.1625 seconds per sheet, increasing stacking throughput by 35% compared to conventional processes.
- Original cell structure design: Introduced a proprietary “integrated 3D airflow top cover” structure; dedicated automation equipment ensures manufacturing stability and structural strength of large-size components—breaking industry bottlenecks.
- Improved back-end cell manufacturing efficiency: Developed high-efficiency baking, 1.2MPa high-pressure isostatic electrolyte filling, and high-rate formation and grading processes, boosting back-end manufacturing efficiency by 45%.
- Greater consistency in cell wrapping: Introduced a highly compatible flexible lamination roller system to effectively solve industry-wide issues such as wrinkling and bubbling in ultra-large cell packaging.
Creating a New Full-Lifecycle Safety Industry Standard
Product safety continues to be the unwavering basis for adoption as system energy density rises with larger-capacity designs. Hithium uses a multi-level safety architecture at the cell, module, and system levels to guarantee full-lifecycle safety for large-capacity energy storage systems, according to a presentation made by Dr. Xiaoxiao Liu, the company’s product safety specialist, at the event.
Advanced electrolyte formulation is used at the cell level to provide high-temperature-resistant SEI and CEI layers, improving cycle life and safety. A dual-mode thermal protection mechanism stops oxygen intrusion and heat spread at the Pack level. In order to guarantee stable and secure system operation, functional safety and cybersecurity are combined at the BMS level using multimodal early warning algorithms and redundant control technologies. A strengthened internal frame, many layers of fire-resistant and heat-insulating materials, and sophisticated fire detection and suppression technologies all contribute to the system’s proactive prevention of thermal runaway and preservation of structural integrity.
Backed by Authoritative Certifications, Accelerating Global Expansion
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 ∞Cell 1175Ah meets global safety standards, laying a solid foundation for its entry into the North American market.
Hithium also signed a strategic cooperation agreement with El Mor, the leading EPC company in Israel, to launch Hithium’s first long-duration energy storage project in Romania, accelerating the development of the local long-duration energy storage market.
The successful mass production of the world’s first kAh battery cell is the latest demonstration of Hithium’s ability to break through industry bottlenecks in both R&D and manufacturing. As the world accelerates into the era of long-duration energy storage, ∞Cell 1175Ah is poised to become a new market benchmark. Ranked as a top 3 company in global energy storage battery shipment, Hithium continues to lead the industry as an innovation-driven value creator.
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