Introduction   Coupling electrochemical energy storage equipment with thermal power plants is a feasible solution to improve the flexible peaking capacity of power system under the high proportion penetration of renewable energy power.

    Method   The function and application characteristics of electrochemical energy storage technology in thermal power plants were introduced firstly. Then the characteristics of electrochemical energy storage technology were summarized and concluded. Meanwhile, the applicability of different types of electrochemical energy storage systems for different application purposes scenarios was analyzed. According to the current application and bottleneck of electrochemical energy storage technology in thermal power plants, the development direction of electrochemical energy storage technology is discussed. Finally, the development direction of electrochemical energy storage technology was prospected.

    Result   According to the analysis results, although the electrochemical energy storage technology has a broad engineering application prospect in thermal power plants, there is still room for improvement in operation safety, construction and maintenance costs, material recovery, and other aspects.

    Conclusion   Operation strategy optimization, development of new high-performance materials, and equipment safety and recycling management will become the main development directions of electrochemical energy storage technology participating in the application process of thermal power frequency modulation in the future.