复合集流体走向产业端，助推固态电池量产“落地”

Core Viewpoint - The composite current collector has transitioned from laboratory to industrial application, with Yinglian's technology layout in solid-state batteries injecting lasting momentum into the industry's high-quality development, becoming a key force in driving the transition from concept to large-scale application of solid-state batteries [1][10][22] Group 1: Structural Reconstruction - The implementation of new national standards for power batteries and the popularization of fast-charging technology have intensified safety performance tests, highlighting structural defects in traditional current collectors [3][13] - Traditional aluminum foil is prone to aluminum-thermal reactions during thermal runaway, leading to significant temperature increases, which is a major cause of battery fires and explosions [4][14] - The composite current collector's "polymer substrate + metal coating" sandwich structure provides a revolutionary solution to these issues, enhancing safety by blocking electric arcs and weakening aluminum-thermal reactions [5][15] Group 2: Precision Control - Despite the significant advantages of composite current collectors, challenges such as high process difficulty and yield control have hindered mass production [6][16] - Yinglian has established a comprehensive process system that includes raw materials, processing, testing, and data systems to overcome mass production bottlenecks [5][16] - The composite copper foil has achieved a production width of 1140mm with a thickness uniformity control of ≤2%, entering a stable mass production phase to meet the continuous large-scale production needs of power batteries [6][17] Group 3: Forward-looking Layout - Yinglian is proactively laying out new composite current collectors required for the next generation of solid-state batteries while consolidating its advantages in the liquid battery market [6][18] - The company is collaborating with leading customers to enhance the bonding strength and coating density of bipolar current collectors, aiming for mass production capabilities between 2025 and 2027 [6][18] - The lithium deposition technology developed by Yinglian shows unique advantages, significantly improving cycle life compared to traditional rolling methods, with a volume change rate of less than 3% [7][18] Group 4: Industrial Value - The widespread application of composite current collectors is expected to become a crucial lever for the lithium battery industry's transition from scale expansion to quality efficiency [6][19] - Yinglian has completed a comprehensive layout from technology research and development to mass production, with a total investment of 3.089 billion yuan in a demonstration factory in Jiangsu, expected to produce 500 million square meters of composite copper foil and 200 million square meters of composite aluminum foil by 2025 [6][19] - By collaborating deeply with upstream raw material and equipment manufacturers, Yinglian has formed a synergistic industrial ecosystem, establishing a joint research institute with a leading Japanese vacuum equipment manufacturer [9][21]