宁德时代第三代储能电芯量产，为何选择587Ah?

Core Viewpoint - CATL officially announced the mass production and delivery of the next-generation large-capacity energy storage cell, the 587Ah cell, at the 2025 Energy Storage Technology Day, emphasizing the creation of real value and exploring optimal solutions for the next generation of energy storage cells [1][3]. Group 1: Product Features and Innovations - The 587Ah cell is the first mass-produced energy storage cell of its kind, developed over three years, demonstrating that larger cells are not always better, and finding a balance among various complex factors is crucial [3]. - The 587Ah cell achieves a 40% reduction in the total number of system components, decreasing from 30,000 to 18,000, while adhering to the 45-ton transportation weight limit for hazardous materials [3]. - The cell has improved safety, energy density, lifespan, and system efficiency, with a 5% increase in the return on investment over its lifecycle compared to the previous generation [3]. Group 2: Quality and Production Capabilities - The 587Ah cell boasts industry-leading quality and delivery capabilities, with a single defect rate reaching PPB level (parts per billion) and a safety control level of 7.5 sigma, while production efficiency has increased by 50% and carbon emissions have been reduced by 57% [4]. - The cell's energy density reaches 434Wh/L, a 10% improvement over the previous generation, and the system energy density has increased by 25% [5]. Group 3: Reliability and Safety - The 587Ah cell significantly enhances reliability, with a fault rate due to self-discharge being an order of magnitude lower than that of stacked batteries, ensuring stable long-term operation of energy storage stations [9]. - A three-dimensional defense system composed of safe electrolytes, non-diffusing anodes, and heat-resistant isolation membranes ensures high safety for the 587Ah cell, passing national mandatory standards [9]. Group 4: Market Position and Future Outlook - CATL has maintained the top global shipment volume of energy storage cells for four consecutive years, with over 256GWh deployed across more than 1,000 projects, all maintaining a zero-accident record [6]. - The 587Ah cell is positioned to set a new benchmark for quality and value in the energy storage industry amid the ongoing transformation driven by policy and market forces [6].