Large -scale energy storage systems usually use containers as carriers, which assembled battery systems, energy management systems, battery management systems (BMS), market (PCS), cooling systems, fire protection systems, and lighting and monitoring systems.

Battery system: usually consisting of several battery clusters, and the battery cluster is composed of several battery packs. Different from the battery pack structure, the battery packet may have a battery management system (BMU).

Energy management system: called EMS (Energy Management System), which mainly monitor the real -time operating status information of the power station, including system power curve, battery voltage temperature information, cumulative processing power information and other agreed monitoring information.

Battery management system: called BMS (Battle Management System), which mainly manages the charging and discharge protection of the battery pack. When fully charging, the voltage difference between the batteries of each monomer can be ensured that the set value is less than the set value, and the balance of each single battery of the battery packs can effectively improve the charging effect under the series charging method. At the same time, the overvoltage, underwriting, overcurrent, short -circuit, and over -temperature state of each single battery in the battery pack is protected and extended the service life of the battery. Generally, it is a three-level architecture, that is, the battery pack-battery cluster-battery system has a control unit.

Conveter system: called PCS (Power Conversion System). Lithium -ion battery outputs DC power. When the battery and power grid interaction, it is necessary to perform a crossfacket conversion, which requires an energy storage transformer system. Energy storage transformers can complete the two -way energy flow of the grid and battery, and through controlling the strategy to achieve the charging management of the battery system, the network measurement load power tracking, the battery energy storage system charging power control and normal and the island operation method are offline Control of voltage measurement; it has the characteristics of high conversion efficiency, wide voltage input range, fast and network switching and convenient maintenance. , Meet the system and leave the network requirements.

Cooling system: Because the lithium battery has a range of operating temperature in the system, the environmental temperature needs to be controlled. There are usually two forms of wind and cold and liquid cold. As a traditional way of cooling, wind and cooling are mature and widely used. The disadvantage is that there is a air duct with a large overall volume; the cooling method of liquid cooling is recently popular. It is characterized by the use of liquid to cool down. Efficiency, at the same time, does not require a duct to make the overall volume smaller, the energy is higher, the disadvantage is that the price is higher, and the technology is not as good as the wind and cold.

Fire prevention system: For the traditional lead -acid battery of lithium -ion batteries, the heat is large, and the heat stability is not as good as the lead -acid battery. It is risk of fire during operation. Therefore, the fire system is an important part of the energy storage of lithium ion battery. The container energy storage system generally uses a pipe network firefighting. The medium is seven fluoropyl fluorine or whole fluorine ketone. There are also cases of water spraying. In the smaller industrial and commercial energy storage and mobile energy storage, you can also use gas solution methods. In the future, the advantages and disadvantages of several methods will be explained in detail and its typical application forms. It will not be repeated here.