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睿恩新能源 国内销售副总经理 谢志明:无极耳圆柱电芯性能和安全带来的行业惊喜
起点锂电· 2025-07-12 10:07
Core Viewpoint - The 2025 Fifth Annual Qidian Two-Wheeled Vehicle Battery Swap Conference highlighted advancements in battery technology, particularly focusing on the performance and safety of the "Wujie Ear" cylindrical battery cells developed by Ruien New Energy, which are positioned as industry-leading products in the two-wheeled vehicle sector [1][2]. Company Overview - Ruien New Energy was established in October 2022 and has rapidly developed a production facility exceeding 100,000 square meters within 13 months, achieving mass production standards [2]. - The company has launched the world's first mass-produced "Wujie Ear" 21700-5.0AH battery cell and the 21700-6.0AH cell, which are currently the highest energy density cylindrical cells globally, demonstrating a technological lead of 1-2 generations over competitors [2]. Battery Technology Insights - The "Wujie Ear" battery cell design significantly reduces electronic resistance, improving energy efficiency and thermal performance. The internal resistance is reduced by 80%, and the temperature rise during discharge is lowered by 30%, resulting in an 80% increase in energy over the battery's lifecycle [5]. - The cylindrical structure allows for nearly 100% roundness, enabling stress release in all directions, which is crucial for using high nickel and silicon materials without safety issues [3]. Manufacturing Process - The manufacturing of "Wujie Ear" cells involves complex processes with thousands of control points, including precise coating and laser welding techniques that enhance performance and safety [6][7]. - The company employs a team of experienced engineers, many of whom have over 15 years of experience at Panasonic, ensuring high-quality production standards and a high yield rate of over 90% [7]. Performance Metrics - The 21700-5.0AH cell can achieve 270Wh/kg in mass production, with plans to reach 300Wh/kg, making it one of the highest energy density cells available [8]. - The cells support extreme temperature ranges from -40°C to 80°C, with the ability to discharge at high rates even in low temperatures [10]. Product Recommendations - For lightweight two-wheeled vehicles, the RH60 cell is recommended, offering a discharge capacity of over 5900mAh and supporting 1C charge and 2C discharge rates [12]. - For electric motorcycles, the RS50 and RS60 cells are highlighted for their high energy density and excellent low-temperature performance, with RS50 supporting 3C continuous charging and RS60 supporting 2.5C [13].