Against the backdrop of accelerated global energy transition and comprehensive construction of the new power system, energy storage system battery, as a core carrier for new energy consumption, power grid peak shaving and valley filling, and power security guarantee, has upgraded from a traditional energy supporting device to a core pillar of energy system reform. With the continuous expansion of installed capacity of intermittent new energy such as wind power and photovoltaic power, prominent problems including mismatched power supply and demand and insufficient power grid stability have emerged. Energy storage system batteries with the advantages of energy storage, rapid response and flexible scheduling have become key equipment to solve the problem of new energy consumption, improve power system resilience and achieve carbon peaking and carbon neutrality goals. At present, the global energy storage industry has entered a new stage of large-scale, market-oriented and intelligent development. The technological innovation, scenario implementation and industrial upgrading of energy storage system batteries directly determine the construction quality of the new power system and the progress of energy transition.

　　From the perspective of industrial development status, the global energy storage system battery market is booming with continuous industrial scale expansion and sustained high prosperity. Statistics show that the global shipment of energy storage batteries increased significantly in 2025. Chinese enterprises occupy an absolute leading position in the global market, accounting for more than 97% of global shipments and leading the development pattern of the global energy storage industry. The domestic market shows a stronger growth momentum. By the end of 2025, the cumulative installed capacity of new energy storage in China had reached 136GW/351GWh, with a year-on-year surge in installed capacity and power scale. The industry has bid farewell to the initial policy-driven development stage and entered a new period of large-scale development driven by market-oriented profits. In the first half of 2026, China's energy storage battery shipment reached approximately 485GWh, a year-on-year increase of over 80%. Upstream and downstream enterprises in the industrial chain continue to achieve excellent performance, the market concentration of leading enterprises keeps rising, and the top ten enterprises account for more than 80% of total shipments, with increasingly prominent industrial agglomeration effects.

　　Diversified technological iteration is the core driving force for the high-quality development of the energy storage system battery industry. Currently, lithium-ion batteries dominate the energy storage market. Thanks to excellent safety performance, long cycle life, controllable cost and strong adaptability, lithium iron phosphate batteries account for over 90% of new energy storage installed capacity, widely applied in mainstream scenarios such as power grid energy storage, industrial and commercial energy storage, and household energy storage. To break through the resource constraints and safety bottlenecks of lithium batteries, the industry continues to promote the parallel development of multiple technological routes. Sodium-ion batteries rapidly penetrate low and medium-end energy storage scenarios relying on abundant raw material reserves, low cost and excellent low-temperature performance. Flow batteries accelerate their layout in large-scale long-duration energy storage projects due to their ultra-long cycle life, high safety and long-duration energy storage advantages. The global installed capacity of flow batteries increased by 67% year-on-year in 2023, becoming a core increment in the long-duration energy storage track. Meanwhile, emerging technologies such as AI-optimized cell structures, modular stack designs and hybrid organic-inorganic electrolytes continue to make breakthroughs, constantly improving the charge-discharge efficiency, energy density and operational stability of energy storage system batteries.

　　The diversified implementation of scenarios promotes the upgrading of energy storage system batteries from single-function supporting to full-scenario value empowerment. In the past, energy storage batteries mainly relied on wind and solar new energy projects with single functions and limited profit models. Today, with the deepening of power market reform, energy storage system batteries have formed a three-benefit model including electric energy transaction income, power grid auxiliary service income and fixed capacity price compensation, becoming an independent profitable core power asset. On the power grid side, energy storage system batteries can accurately complete auxiliary services such as peak shaving, frequency modulation, voltage regulation and standby support, effectively relieve power grid load pressure, solve the problem of grid connection fluctuation of new energy, and improve the safe and stable operation capacity of the power grid. On the new energy power generation side, the "wind-solar + energy storage" supporting model stabilizes the intermittent and volatile defects of new energy power generation and greatly improves the new energy consumption rate. At present, solar-storage combined projects account for 38% of global new renewable energy installations. On the industrial and commercial side, enterprises equipped with energy storage system batteries can realize arbitrage through peak-valley electricity price differences, ensure standby power supply, optimize energy consumption management, effectively reduce power consumption costs and avoid power outage losses. In household and microgrid scenarios, distributed energy storage batteries matched with distributed new energy build an independent power supply system, solve power supply problems in remote areas and boost inclusive energy access.

　　Intelligentization, safety and low cost have become the core development trends of the current energy storage system battery industry. In terms of intelligentization, relying on big data, artificial intelligence and Internet of Things technologies, energy storage system batteries realize intelligent early warning, accurate scheduling and adaptive charge-discharge management. Weather-predictive charging algorithms and dynamic frequency response systems significantly improve the operational efficiency and adaptability of energy storage systems. In terms of safety, the industry continuously optimizes cell materials, packaging processes and thermal management systems, builds a full-life-cycle safety monitoring system, effectively solves industrial pain points such as battery thermal runaway and excessive attenuation, and meets the safe operation requirements of large-scale energy storage power stations. In terms of low cost, technological iteration, large-scale production and industrial chain collaborative optimization continuously drive down the unit cost of energy storage batteries. Supported by the mature market-oriented profit model, the investment return cycle of energy storage projects is continuously shortened, and the commercial implementation capacity of the industry is greatly improved.

　　Meanwhile, the development of the energy storage system battery industry still faces certain challenges. On the one hand, batteries of different technical routes have inherent shortcomings: lithium batteries face resource dependence and recycling problems, sodium batteries have low energy density, and flow batteries have high equipment costs. On the other hand, the industrial standard system needs to be further improved, the energy storage scheduling mechanism and pricing mechanism in some scenarios are not fully mature, and regional industrial development is unbalanced. In the future, the industry needs to continuously increase investment in technological research and development, promote the complementary upgrading of multiple technical routes, improve the battery recycling system, and build a green and low-carbon industrial closed loop. It is also essential to further deepen power market reform, optimize the rule system for energy storage participation in power transactions, and release the diversified value of energy storage.

　　In general, as a core component of the new power system, energy storage system battery is a key starting point for energy transition and a trillion-level golden track. Driven by continuous technological iteration, expanding scenarios, policy empowerment and growing market scale, energy storage system batteries will further realize technological upgrading, cost reduction and value release, fully empower the large-scale development of new energy, intelligent upgrading of power grids and national energy conservation and carbon reduction, and provide solid hardware support and industrial guarantee for global energy structure reshaping and the implementation of dual-carbon goals. In the future, with the continuous improvement of industrial maturity, energy storage system batteries will completely change the traditional power operation mode and become an indispensable core main asset in the new energy system.