From the current development of new energy storage and electrochemical energy storage, the overall situation is still dominated by lithium, with lithium-ion batteries as the main form of new energy storage, accounting for 97.3%. The situation of ‘lithium dominance’ is not a good thing. Large energy storage power stations are often composed of tens of thousands or even hundreds of thousands of batteries, and their cumulative probability is high. Once the energy storage power station forms a battery system, a series of electrical failures will occur, further increasing the probability of fire.
One level guarantee: PACK level gas fire extinguishing system
Lithium battery energy storage fires often originate from inside the battery, so extinguishing the fire outside the battery is not enough. At the same time, the temperature of the battery must be lowered, the chemical reactions inside the battery must be lowered, or even stopped, in order to achieve the purpose of extinguishing the fire.
◆ Using a single battery as a protective unit
The PACK level fire extinguishing system adopts a box type fire extinguishing method, with a single battery as the protection unit, which is conducive to fixed-point fire extinguishing in the early stage of the fire, seizing the best fire extinguishing opportunity, preventing the fire from spreading to other batteries in the cabin, and reducing losses.
◆ Insulation fire extinguishing agent
Gas fire extinguishing agents have insulation properties and are less likely to cause short circuits in batteries and electrical appliances, effectively preventing the spread of fires.
◆ Efficient fire extinguishing
Unmanned operation, intelligent start, spray time generally ≤ 10s (large dose of spraying agent for fire extinguishing in a short period of time). Fire extinguishing agents such as perfluorohexane and heptafluoropropane have excellent effects on isolating oxygen, vaporizing and absorbing heat, and cooling. Through comprehensive action, achieve efficient fire extinguishing.
◆ Strong volatility
Perfluorohexane has extremely strong volatility and will not deposit on equipment, causing pollution and other issues.
Double guarantee: cabin level gas fire extinguishing system
The cabin level gas fire extinguishing system is mainly used to extinguish fires outside the battery cabinet and battery rack. When a fire spreads outside the battery cabinet or a fire occurs outside the battery cabinet, the cabin level gas fire extinguishing system will start extinguishing the fire or start extinguishing the fire simultaneously with the PACK level gas fire extinguishing system to prevent the fire from spreading to other energy storage containers
Triple guarantee: Cabin level water sprinkler fire extinguishing system
When the spread of fire in the cabin has already formed or may continue to expand, human intervention can be used to activate the water sprinkler fire extinguishing system, continuously cool down, effectively prevent further expansion, thermal runaway, and reignition of the accident, and at the same time buy time for firefighting and rescue.
Using a large amount of water spray can effectively remove heat and prevent thermal runaway, but it can also easily lead to explosion risks and electrical short circuit problems. The use of high-pressure fine water mist fire extinguishing devices not only reduces water usage, but also has efficient oxygen isolation and vaporization heat absorption effects, while reducing risks such as short circuits.
◆ Efficient fire extinguishing
The particle size of fine water mist droplets is small (droplets with a diameter of less than 200 μ m account for more than 50%, and droplets with a diameter of less than 400 μ m account for more than 99%). With the same volume of water, the area of contact between fine water mist and flame increases significantly, and it quickly absorbs heat and cools the flame during gasification; During the gasification process, droplets can expand in volume by more than 1700 times, forming a large amount of water vapor surrounding and covering the flame, which can reduce oxygen concentration and block oxygen supply.
◆ Purification effect
The fine water mist fire extinguishing system uses water as the extinguishing medium and has a significant washing and flushing effect on smoke and dust, which can improve the visibility of the fire scene and facilitate personnel evacuation and firefighting rescue