The integration of energy storage systems is not simply about assembling various energy storage components, but has multiple professional technical barriers. From the selection of core components at the beginning, to the design of energy storage systems, the assembly and integration of energy storage components, product debugging, to the later operation and application, each step is the key technology of energy storage integrated systems.The following are the key technologies of the core components of the energy storage system.

1、Battery system：The battery system is the core of the energy storage system and determines the storage capacity of the energy storage system. Large scale energy storage batteries are also composed of individual cells, and there is not much room for cost reduction in terms of technology. Therefore, the larger the scale of energy storage projects, the higher the proportion of batteries. The selection of batteries should consider various factors such as the customer's application scenario, electricity load, and investment budget.

2、Battery Management System: As a key monitoring system, Battery Management System (BMS) is an important component of energy storage battery system. The battery management system for energy storage is more comprehensive and requires higher requirements than general battery management systems. The battery management system needs to monitor the battery for overcharging, over discharging, over temperature, short circuit, etc., to ensure the safe operation of the battery.

3、Energy Storage Converter: Energy Storage Converter (PCS) is a crucial component of the energy storage system, responsible for controlling the charging and discharging of batteries, and performing AC/DC conversion to directly supply power to AC loads without a power grid. Mastering the conversion technology of energy storage inverters can achieve efficient, stable, and precise control of electrical energy. Many energy storage integration enterprises have conducted in-depth research and development to improve the efficiency of energy storage systems.

4、Energy Management System: The EMS plays a decision-making role in the energy storage system and is the decision-making center of the energy storage system. The energy storage system participates in power grid scheduling, virtual power plant scheduling, etc. through the energy management system. The energy management system collects important data from all communication subsystems and controls the orderly and stable operation of the entire energy storage system through data collection, processing, and analysis, as well as internal program logic operations.

5、Temperature control and fire protection of energy storage systems: Large energy storage power stations need to be equipped with temperature control and fire protection systems. The selection of temperature control and fire protection systems should be based on factors such as the scale and safety requirements of the energy storage system. The requirements for temperature control systems in energy storage power stations are quite high, and the reasonable selection of fire-fighting equipment is also an important factor in the safety of energy storage power stations.

In summary, the reasonable selection of core components in energy storage systems is a key factor. It is necessary to fully understand the performance characteristics of each core component, combine practical application scenarios, electricity loads and other factors, and configure the energy storage system reasonably. This is the long-term development goal of energy storage technology.