Polaris energy storage network learned that China sodium Electric Group Co., Ltd. released the latest research and development trends of 588Ah sodium electric University cell. In terms of technological breakthroughs, the cell uses cations (V3 +, Cr3 +, Ti3 +, etc.) the replacement strategy inhibits Na/Fe synchysis and improves redox reaction activity and structural stability. The developed high-capacity polyanion cathode material has a reversible specific capacity of 105 mAh/g and 588Ah cell energy density exceeding 165 Wh/kg. Develop sodium ion battery fluoro high-pressure resistant solvent system and silane-based electrolyte additives to ensure the compatibility of electrode/electrolyte interface under high voltage. Realize long-lasting circulation under the working voltage of large capacity sodium ion cell 4.1V, and the number of cycles is greater than or equal to 10,000 times to ensure safe operation of sodium ion battery under high voltage.

In terms of process optimization and energy storage system, Adaptive flow field precise coating technology and collaborative calendering technology are adopted at the coating and rolling ends to ensure the uniform performance of 300 + polar plates, and access our independent research and development of light-Force-spectrum real-time collaborative welding technology to ensure the precision and firmness of the whole pole ear welding.

588Ah cell technical solution solves the problems of low energy density of traditional sodium ions, long heat dissipation path and difficulty in rapid heat conduction. The energy storage system can be designed with air cooling system, and the design life is consistent with that of lithium iron phosphate liquid cooling system, the overall structure of the air-cooled system is simple, easy to maintain, and the comprehensive cost is 20% lower than that of the liquid-cooled system.