Container Energy Storage System (CESS) is an integrated energy storage system developed for the needs of the mobile energy storage market, with integrated battery cabinets, lithium battery management system (BMS), container kinetic loop monitoring system, and energy storage converter and energy management system that can be integrated according to customer needs.
The container energy storage system has the features of simplified infrastructure construction cost, short construction period, high modularity, easy transportation and installation, etc. It can be applied to thermal, wind, solar and other power stations or islands, communities, schools, scientific research institutions, factories, large-scale load centers and other applications.
Container classification (according to the use of material classification)
1. aluminum alloy container: the advantages are light weight, beautiful appearance, corrosion resistance, good flexibility, easy processing and processing costs, low repair costs, long service life; the disadvantage is the high cost, poor welding performance;
2. steel containers: the advantages are high strength, firm structure, high weldability, good watertightness, low price; the disadvantage is that the weight is large, poor corrosion resistance;
3. glass fiber reinforced plastic container: the advantages of strength, good rigidity, large content area, heat insulation, corrosion, chemical resistance, easy to clean, easy to repair; disadvantages are weight, easy to aging, screwing bolts at the reduction of strength.
Container energy storage system composition
Taking 1MW/1MWh containerized energy storage system as an example, the system generally consists of energy storage battery system, monitoring system, battery management unit, special fire protection system, special air-conditioning, energy storage converter and isolation transformer, and ultimately integrated in a 40-foot container.
1. Battery system: mainly consists of series-parallel connection of battery cells, first of all, a dozen groups of battery cells through the series-parallel connection of battery boxes, and then battery boxes through the series connection of battery strings and enhance the system voltage, and ultimately the battery strings will be paralleled to enhance the capacity of the system, and integrated and installed in the battery cabinet.
2. Monitoring system: mainly realize external communication, network data monitoring and data acquisition, analysis and processing functions, to ensure accurate data monitoring, high voltage and current sampling accuracy, data synchronization rate and remote control command execution speed, the battery management unit has a high-precision single-voltage detection and current detection function, to ensure that the voltage balance of the battery cell module, to avoid the generation of circulating currents between the battery module, affecting the efficiency of the system operation.
3. Fire-fighting system: In order to ensure the safety of the system, the container is equipped with a special fire-fighting and air-conditioning system. Through the smoke sensor, temperature sensor, humidity sensor, emergency lights and other safety equipment to sense the fire alarm, and automatically extinguish the fire; dedicated air conditioning system according to the external ambient temperature, through the thermal management strategy to control the air conditioning cooling and heating system, to ensure that the temperature inside the container is in the right zone, to extend the service life of the battery.
4. Energy storage converter: It is an energy conversion unit that converts battery DC power into three-phase AC power, and it can operate in grid-connected and off-grid modes. In grid-connected mode, the converter interacts with the power grid according to the power commands issued by the upper-level scheduler.In off-grid mode, the converter can provide voltage and frequency support for plant loads and black start power for some renewable energy sources.The outlet of the storage converter is connected to the isolation transformer, so that the primary side and the secondary side of the electrical completely insulated, to maximize the safety of the container system.
Advantages of containerized energy storage system
1. The energy storage container has good anti-corrosion, fire prevention, waterproof, dustproof (wind and sand), shockproof, anti-ultraviolet ray, anti-theft and other functions, to ensure that 25 years will not be due to corrosion.
2. Container shell structure, heat insulation and heat preservation materials, internal and external decorative materials, etc. all use flame retardant materials.
3. Container inlet, outlet and equipment air inlet retrofitting can be convenient to replace the standard ventilation filter, at the same time, in the event of gale sand electrical can effectively prevent dust into the container interior.
4. Anti-vibration function shall ensure that the transportation and seismic conditions of the container and its internal equipment to meet the requirements of mechanical strength, does not appear deformation, functional abnormalities, vibration does not run after the failure.
5. Anti-ultraviolet function shall ensure that the container inside and outside the nature of the material will not be due to ultraviolet radiation degradation, will not absorb ultraviolet heat, etc.
6. Anti-theft function shall ensure that the container in the outdoor open-air conditions will not be opened by thieves, shall ensure that in the stealer tries to open the container to produce a threatening alarm signal, at the same time, through the remote communication to the background of the alarm, the alarm function can be shielded by the user.
7. Container standard unit has its own independent power supply system, temperature control system, heat insulation system, fire-retardant system, fire alarm system, mechanical chain system, escape system, emergency system, fire-fighting system, and other automatic control and guarantee system.
Post time: Oct-20-2023
