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In the past 2020, despite the impact of the new crown pneumonia epidemic, the global energy storage industry still maintained a rapid growth momentum. According to Bloomberg New Energy Finance, the global energy storage market will increase from 3.3GW/6.5GWh in 2019 to 4.6GW/9.4GWh in 2020, setting a new record. Relevant statistics show that as of the end of September 2020, the cumulative installed capacity of my country's energy storage equipment industry reached 33.1GW, a year-on-year increase of 5.1%. Wu Jiamang, vice chairman of the Zhongguancun Energy Storage Industry Technology Alliance, believes that with my country’s economic transformation, the rapid development of green energy and the deepening of energy supply-side structural reforms, my country’s energy storage development needs are expanding and the energy storage industry is developing rapidly. Has become inevitable.

Renewable energy promotes energy storage demand, energy storage companies increase their layout

Energy storage is the storage of energy. The upstream of the energy storage industry chain mainly includes battery raw materials and production equipment suppliers; the midstream is mainly suppliers of batteries, battery management systems, energy management systems, and energy storage converters; the downstream is mainly energy storage system integrators, installers and terminals Users etc. In the context of the deepening of the global energy transition, the replacement of traditional fossil energy by renewable energy has become a general trend. Due to the natural instability of wind and photovoltaic power generation, supporting energy storage is required to completely replace the traditional fossil energy installed capacity.

Since 2020, many local governments and provincial network companies have issued relevant notices requesting to encourage renewable energy power generation projects to be equipped with a certain percentage of energy storage, and some regions also give certain subsidies to user-side energy storage projects. According to data from the General Administration of Customs, in November 2020, my country’s monthly export value of solar cells was 13.880 billion yuan, an increase of 41.5% year-on-year; the monthly export value of inverters was 3.007 billion yuan, an increase of 75.6% year-on-year. More and more large-scale electrical or battery companies have regarded energy storage business as a strategic business. Sungrow’s 2020 semi-annual report shows that during the reporting period, the company’s energy storage business continued to grow. At present, the company’s energy storage systems are widely used in China, the United States, the United Kingdom, Canada, Germany and many other countries. In North America, Sungrow is only industrial and commercial energy storage The market share exceeds 20%; in Australia, through in-depth cooperation with distributors, Sungrow's household optical storage system market share exceeds 20%. BYD and Goldwind held a strategic cooperation signing ceremony in July 2020. The two parties will work together to create the best energy storage solutions and product services for the power-side energy storage scenario. Shanghai Electric has established an energy storage and fuel cell business unit, which connects core technologies in distributed power sources, all-vanadium redox flow energy storage batteries, lead-acid batteries, lithium battery energy storage system battery management technology, and megawatt energy storage systems. Provide technical solutions in the fields of unit module production and hierarchical structure energy storage power station construction capabilities, comprehensive loss reduction of the distribution network, and power quality improvement solutions.

The rapid growth of my country's energy storage industry is the result of the combined effects of many factors. On the one hand, the cost reduction of energy storage systems has laid the foundation for commercial applications. On the other hand, the energy storage industry has initially established a relatively complete industrial chain. At present, although it still relies on foreign technology in some key links, my country has a layout in mainstream technology and cutting-edge technology. In addition, the large-scale implementation and operation of energy storage projects in my country have confirmed the irreplaceable functions and unique advantages of energy storage in the main application areas. Finally, national policy support is also indispensable.

Energy storage integration still faces challenges, and top-level design needs to be strengthened in the long run

Wu Jiamaung believes that, as a key supporting technology for a high proportion of renewable energy, energy storage is indispensable in promoting the low-carbon transition of global electricity, especially in the power system where the proportion of renewable energy is increasing. Play an increasingly important role.

However, the energy storage industry still faces several major challenges. Grid-side energy storage is still mainly dependent on the grid and lacks its own independence. This makes grid-side energy storage still facing the dilemma of insufficient investment funds, and it is necessary to design a suitable market mechanism. The user-side energy storage mainly relies on the peak-to-valley price difference to obtain income, with a single source of income and a low yield. Even in areas with high peak-to-valley spreads, the return on investment cycle is often more than seven years. Moreover, it is still unclear how the peak-to-valley price mechanism will be adjusted in the future, which brings uncertain risks to user-side energy storage and also inhibits related investment.

Relative to the uncertain benefits of the industry, the cost of the energy storage industry has remained high. In 2020, the cost per kilowatt-hour of energy storage in my country will be around 0.5 yuan. According to the cost per kilowatt-hour of the current energy storage system, there is still not a small gap from the target cost per kilowatt-hour for large-scale applications of 0.3 to 0.4 yuan. The energy storage system is an auxiliary system of the power system, including system control, electrical safety, DC side management, equipment optimization and matching, battery health and safety linkage protection management and other complex content, which requires standardized and modular technical interfaces to reduce Access costs, but the relevant standards are still lacking, and modularity is even less mature. Finally, it is necessary to weigh marketization and grid security. Marketization is not to let go. It should be a mechanism design in which the energy storage industry trades to meet the development goals of the energy storage industry.

Industry experts believe that, in the long run, my country needs to coordinate the development of the energy storage industry from the top-level design, build a more complete operating mechanism and power market mechanism, open up multiple applications of energy storage through policy adjustments, and accelerate the process of energy storage commercialization. With the deepening of my country's power system reform and the release of energy storage policies, the participation of energy storage in power auxiliary services and the participation of user-side energy storage in power demand response will realize the value superposition of the energy storage system and lay the foundation for its profitable commercial development.

Article information source-China Industry News Network