高工锂电·2025-11-28 12:05Core Viewpoint - The article highlights the normalization of negative electricity prices in various regions, including China, Europe, and Australia, driven by the imbalance between electricity supply and demand due to the rapid increase in wind and solar power installations. This situation is creating a new demand for medium to long-duration energy storage solutions, particularly in the 4-12 hour range [2][3]. Group 1: Market Trends and Developments - The phenomenon of negative electricity prices is becoming commonplace, prompting a shift towards medium to long-duration energy storage solutions [2][3]. - The global competition for energy storage systems with a capacity of 6MWh and above is intensifying, with a focus on long-duration storage solutions [3][4]. - By 2024, the penetration rate of 4-hour energy storage systems reached 15%, and this segment is becoming mainstream in 2025 [3][4]. Group 2: Technological Advancements - Major Chinese companies are rapidly increasing the production of large-capacity energy storage systems to seize market opportunities in the long-duration storage era [4][5]. - Companies like Ningde Times and Envision Energy are leading the charge with the mass production of high-capacity energy storage cells, such as the 587Ah cell [5][7]. - The competition is not limited to lithium batteries; flow battery technology is also gaining traction, with strategic partnerships being formed to develop large-scale storage projects [8][9]. Group 3: Competitive Landscape - The market is witnessing a split between companies focusing on large capacity cells using different manufacturing processes, namely the stacking and winding techniques [10][11]. - The stacking process is favored for its high space utilization and low-temperature performance, while the winding process benefits from established production efficiency [11][12]. - Companies are adopting differentiated strategies based on their technological capabilities, with some focusing on rapid deployment of 500+Ah cells and others on the long-term potential of 600+Ah cells [12][13]. Group 4: System Variability and Customization - The differences in cell technology are reflected in the energy storage systems, with various companies targeting different container sizes (10ft, 20ft, 30ft) to meet diverse application needs [14][15]. - Companies like Sungrow and BYD are launching multiple size versions of their energy storage systems to cater to specific market demands [15][16]. - The trend towards customized solutions is becoming more pronounced, as companies recognize the need for tailored energy storage solutions to address varying requirements in the market [17][19].