In recent years, China has made significant progress in the development of new energy installed capacity, particularly in wind power and photovoltaics. This has led to a critical digital node, where the proportion of new energy installed capacity has reached a pivotal point. In order to meet the growing demand for various regulatory resources, the country has been focusing on accelerating the implementation of new energy storage projects. As a result, the installed capacity of energy storage continues to increase rapidly, alongside the rapid growth of renewable energy installed capacity.

To achieve a level playing field for energy storage, the industry must emphasize large-scale and healthy development and address challenges regarding business models, security and stability, levelization, and levelized cost of energy (LCOE). From a technical standpoint, the evolution of energy storage products will mainly revolve around safety and cost reduction. Key areas of focus include increasing capacity, prolonging battery life, improving efficiency, enhancing safety measures, and promoting integration and intelligence.

The energy storage industry has been progressing towards higher capacity. Currently, the mainstream capacity of power energy storage cells stands at 280Ah. Many companies have released 20-foot 5MWh+ liquid-cooled energy storage system products based on 300Ah+ battery cells. Furthermore, battery cell cycle life has reached an impressive milestone, exceeding 10,000 times. In fact, one company has already introduced a zero-auxiliary source light-storage integration solution with a battery cell cycle life of 15,000 times. This level of cycle life can be achieved by daily charging and discharging for a duration of 25 years.

Efficiency is also a critical aspect to consider in the development of energy storage. The Technical Specifications for Configuration of Photovoltaic Power Station Energy Storage Systems, issued by the Xinjiang Autonomous Region Market Supervision and Administration Bureau, sets a benchmark for the energy conversion efficiency of lithium-ion, lead-carbon, and flow battery energy storage systems. For lithium-ion batteries, the efficiency should not be less than 92%, while for lead-carbon and flow battery systems, the minimum efficiency should be no less than 86% and 65%, respectively.

Security measures, such as temperature control and fire protection technology, have witnessed rapid development. In terms of energy storage temperature control, liquid cooling technology has become the preferred solution for large-scale energy storage systems. With a cell temperature difference of less than 3°C, the liquid cooling system enhances system reliability. Moreover, the integration of different components into a seamless system is a crucial aspect for energy storage. Rather than being mere "building blocks," energy storage system integrators must have a product-oriented mindset and thoroughly test system-level products before delivering them to customers.

Finally, intelligence and digital technologies play a significant role in the integration of software and hardware in energy storage systems. This ensures the safe, stable, and efficient operation of power stations while maximizing value and benefits for owners in a continuous transaction environment. In the future, energy storage systems will heavily rely on digital advancements to fully capitalize on their potential.

In summary, China's rapid growth in new energy installed capacity has made energy storage a critical component of the power system. To achieve a level playing field, the industry is focusing on large-scale and healthy development while addressing challenges related to business models, security and stability, levelization, and LCOE. Key developments in energy storage technology include increased capacity, prolonged battery life, improved efficiency, enhanced safety measures, seamless integration, and the integration of digital technologies. As the industry continues to evolve, China aims to further strengthen its position in new energy storage.

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