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Containerized energy storage system - is this the future of energy storage?
With the rapid development of a new generation of lithium battery materials, lithium battery energy storage systems are more mature than other energy storage batteries. Top 5 global grid-scale lithium battery energy storage systems can take you to learn more about lithium battery energy storage.
In addition, the containerized energy storage system has a wide range of potential applications in the power grid system due to its large capacity, high reliability, high flexibility, and strong environmental adaptability.
This article will introduce the containerized energy storage system, and take the MW-level containerized battery energy storage system as an example to gain an in-depth understanding of the development of future energy storage technology.
What is a containerized energy storage system?
An integrated energy storage system called the containerized energy storage system (CESS) was created to meet the demands of the mobile energy storage sector.
Battery cabinets, battery management systems (BMS), and dynamic environment monitoring systems for containers are all integrated.
In accordance with customer requirements, it can also combine energy storage converters and energy management systems.
The container energy storage system has the advantages of low infrastructure development costs, quick construction times, high levels of modularity, and simplicity in terms of installation and transportation.
It can be used in communities, schools, scientific research facilities, factories, major load centers, and other applications. It can also be used in thermal power, wind power, solar power plants or islands.
Design of containerized energy storage system
The design of the containerized energy storage system is mainly divided into two parts:
Battery compartment: The battery compartment mainly includes batteries, battery racks, BMS control cabinets, fire extinguishing cabinets, cooling air conditioners, smoke detector lighting, surveillance cameras, etc.
The battery needs to be equipped with a corresponding BMS management system.Batteries come in a variety of varieties, including lead-acid, lithium, lead-carbon, and iron-lithium.
The cooling air conditioner is adjusted in real time according to the temperature in the warehouse. The monitoring camera can remotely monitor the operating status of the equipment in the warehouse.
A remote client can be formed to monitor and manage the running status and battery status of the equipment in the warehouse through the client or app.
Equipment warehouse: The equipment warehouse mainly includes PCS and EMS control cabinets. PCS can control the charging and discharging process, convert AC to DC, and can directly supply power to AC loads without a grid.
In the application of energy storage system, the functions and functions of EMS are more important. In terms of distribution network, EMS mainly collects the real-time power status of the power grid through communication with smart meters, and monitors changes in load power in real time.
MW-level containerized energy storage system
Concept
The energy carrier in the MW-level containerized energy storage system is lifepo4 cell. Charge and discharge using PCS to achieve various energy exchanges between the containerized battery energy storage system and the power system.
The containerized energy storage system can be linked to a range of power supply types, including solar arrays, wind energy, diesel generators, and grids. The energy storage system’s output can be connected to the grid, power various load equipment and electric vehicle chargers, and so on.
Design
The MW-level containerized battery energy storage system includes lithium battery packs, battery management systems, energy conversion systems, control systems and other equipment. The core technology is battery pack, battery cluster structure design, battery system thermal design, battery system protection technology, battery management system, etc.
Application
• Access to renewable energy
Renewable energy such as wind energy and solar energy is characterized by strong randomness, high intermittency, and rapid output changes.
The direct connection of renewable energy to the grid, especially the large-capacity access to the grid, will have a certain impact on the dispatch and control of the grid, and even interfere with the stability of the grid.
Combined application of containerized battery energy storage system and renewable energy. Convert randomly changing output power into relatively stable output. This ensures grid system stability and provides a renewable energy storage solution.
• Backup power
In remote areas, areas with poor reliability of power supply or areas with important loads, MW-level containerized battery energy storage system can be used as backup power sources to provide power for grid systems that fail or power distribution systems that need maintenance.
The MW-scale containerized battery energy storage system can be transported to a region and provide a localized power source.
• Microgrid
When the microgrid operates in an isolated network, distributed energy and user loads are highly random, and it is difficult to ensure the real-time balance of power generation and consumption, resulting in a wide range of frequency fluctuations and severe voltage fluctuations.
Large-capacity and high-efficiency containerized battery energy storage system technology can suppress the interference of the external power grid, ensure the power quality of local users, and further realize the smooth operation of the micro-grid.
Advantages of containerized battery energy storage system
1. The energy storage container has good anti-corrosion, fire-proof, waterproof, dust-proof (wind and sand), shock-proof, anti-ultraviolet, anti-theft and other functions, and it is guaranteed not to be corroded within 25 years.
2. The container shell structure, heat insulation materials, interior and exterior decoration materials, etc. are all made of flame retardant materials.
3. The addition of the air inlet and outlet of the container and the air inlet of the equipment can facilitate the replacement of the standard ventilation filter. At the same time, it can effectively prevent dust from entering the container when encountering strong wind and sand blowing.
4. The shockproof function must ensure that the mechanical strength of the container and its internal equipment meets the requirements. Under transportation and earthquake conditions, there will be no failures such as deformation, abnormal function, and non-operation after vibration.
5. The anti-ultraviolet function must ensure that neither the qualities of the materials inside the container nor those on the outside will be harmed by ultraviolet radiation or absorb its heat.
6. The container cannot be opened by thieves outside thanks to the anti-theft mechanism. Using remote communication, the alarm can be simultaneously sent to the background while the user can disable it.
7. The container standard unit has its own independent fire prevention system, temperature control system, emergency system, and other automatic control and guarantee systems.
