The MW level containerized battery energy storage system (CBESS) is an important support for the future development of the power grid, which can effectively improve the stability, reliability, and power quality of the power system. This article summarizes the current research status of MW level container battery energy storage systems, provides a detailed introduction to the relevant concepts and working principles of MW level container battery energy storage systems, comprehensively elaborates on the characteristics and advantages of the structure, design, application, and other aspects of MW level container battery energy storage systems, and deeply explores their development prospects and research directions.

In recent years, the development of MW level battery energy storage technology at home and abroad has been rapid. Container type battery energy storage systems have advantages such as high capacity, strong reliability, high flexibility, and strong environmental adaptability, and have broad application prospects in power grid systems. The lithium-ion battery energy storage system is relatively mature compared to other energy storage batteries, and the upstream and downstream industry chains are well matched, with significant room for cost reduction; At the same time, China's power system is currently in a state of tight power supply during peak periods, low utilization of transmission and distribution capacity, shortage of active and reactive power reserves, and low transmission efficiency. The user side also puts forward higher requirements for the power quality on the load side. These issues have accelerated the rapid development of energy storage technology.

Energy storage technology has become one of the key technologies for the development and construction of smart grids, which can improve the low energy quality of the grid and increase the utilization rate of renewable energy. With the rapid development of new generation lithium battery materials and the further improvement of battery technology, there is broad space for the application of lithium batteries in energy storage. The container type battery energy storage system has the advantages of mature technology, large capacity, mobility, high reliability, pollution-free, low noise, strong adaptability, expandability, and easy installation. Therefore, as the energy storage power source of the power system, the container type energy storage system is the future direction of energy storage development.