Core Viewpoint - The competition in the next-generation energy storage cell market is intensifying, with companies like CATL and Sungrow leading the charge with their respective high-capacity cells, 587Ah and 684Ah, highlighting a broader technological and market strategy battle [4][5][8]. Group 1: Company Strategies - CATL believes that the optimal capacity for energy storage cells is 587Ah, balancing system integration efficiency and safety [5][6]. - Sungrow emphasizes that the efficiency of the entire energy storage system is more critical than the individual cell capacity, advocating for a holistic approach to system design [6][10]. - Both companies agree that larger capacity is not always better, and finding the right balance is essential for optimal performance [5][9]. Group 2: Technological Approaches - CATL utilizes a winding process for its 587Ah cells, which they argue provides a better match for national standards and enhances energy density [5][6]. - Sungrow, on the other hand, employs a stacking process for its 684Ah cells, which they claim is more suitable for high-capacity applications and offers advantages in system-level efficiency [6][7]. - The industry is witnessing a shift towards stacking technology, with over 20 manufacturers now producing stacked cells, indicating a growing trend in this direction [7][8]. Group 3: Market Dynamics - The energy storage market is evolving towards a more integrated approach, where the overall performance of the energy storage system is prioritized over individual cell specifications [10][11]. - The competition is not just about capacity but also about the technological routes and safety standards that each company adheres to [8][9]. - As the market matures, hardware differentiation is expected to diminish, leading to a focus on software capabilities and system integration as key competitive advantages [11].

2025 对于新能源行业来说或许是个转折之年，因为开年来储能和动力电池订单不断，不少头部企业的业绩也迎来回暖。 这一点在宁德时代上尤其明显。起点锂电观察近一周发现，宁德时代近期的好消息已经不止于项目建设。 01 五个方面实现突破 1、587Ah 电芯亮相 首先是产品方面，近日宁德时代搭载于天恒储能系统的 587Ah 大容量电芯亮相，该电芯具有高安全、长寿命、高可靠、高能效、高集成五大 优势。 首先是高安全：采用四维安全技术护航，将热稳定性提升 20% ，从单体电芯到系统集成由点盖面的进行防控，并且储能站级的数智化安全管 理系统也在不断迭代升级。单体电芯实现 430Wh/L 能量密度的同时，安全性能测试甚至比小电芯更优。 接下来是长寿命：全周期可吞吐电量较上一代提升 48% ，引入长寿命缓衰减技术，将电化学特性、长期可靠性和空间要求三大方面进一步平 衡，引入仿生 SEI 膜技术降低活性锂的消耗，提升 IRR 2%-3% 。 第三是高可靠：电芯失效率达至业界领先 DPPB 级，宁德时代拥有超大规模电芯运行数据和大模型，在此之上进行全新迭代，保障每一颗电 芯稳定运行。 第四是高能效：能效长时间维持在 95% 以上， ...