Water fire extinguishing system for high-voltage direct-hanging battery energy storage and control method thereof

Abstract

The invention discloses a water fire extinguishing system for high-voltage direct-hanging battery energy storage and a control method thereof. The water fire extinguishing system comprises a fire control host, an environment temperature detector, a gas detector, a smoke detector, a user switch, an acousto-optic alarm, a high-voltage direct-hanging battery energy storage system emergency stop switch, a fire pump, an A-phase water spraying pipe network unit, a B-phase water spraying pipe network unit and a C-phase water spraying pipe network unit, wherein the environment temperature detector, the gas detector, the smoke detector, the user switch, the acousto-optic alarm, the high-voltage direct-hanging battery energy storage system emergency stop switch and the fire pump are respectively connected with the fire control host; and the A-phase water spraying pipe network unit, the B-phase water spraying pipe network unit and the C-phase water spraying pipe network unit are respectively distributed over an A-phase energy storage battery cluster, a B-phase energy storage battery cluster and a C-phase energy storage battery cluster in a high-voltage direct-hanging battery energy storage system. The system and the method can achieve the functions of rapid positioning of faults, manual and automatic coordinated safety control, rapid partition spraying and the like, the advantages are obvious, and accurate, safe and rapid fire extinguishing is facilitated.

Description

technical field [0001] The invention relates to the technical field of battery fire treatment in an energy storage system, in particular to a water fire-fighting system for high-voltage direct-mounted battery energy storage and a control method thereof. Background technique [0002] We know that most battery fires in energy storage systems are first caused by internal short circuits. The heat and temperature generated by internal short circuits form an "external high temperature environment" for adjacent batteries, triggering thermal runaway of adjacent batteries, leading to a chain reaction of the entire battery pack . For example, the main reason for the combustion of lithium iron phosphate batteries is that the thermal runaway causes the pressure relief membrane to rupture, and then the electrolyte is sprayed out. In this high-temperature environment, the ignition point of the electrolyte is quickly reached, the electrolyte burns, and then ignites the battery wrapping mat...

AI Technical Summary

Problems solved by technology

[0003] At present, heptafluoropropane gas fire protection system is generally used in the field of battery energy storage. Gas fire protection generally includes temperature sensing, smoke detection and gas detection. Once the internal temperature, smoke or gas of the battery energy storage system triggers the detection components in the gas fire protection system, this At this time, the battery inside the energy storage container has actually burned, producing a large amount of heat and smoke, accompanied by the generation of carbon monoxide and hydrogen, and a large amount of heat will cause a chain reaction of adjacent batteries or battery packs. Explosive reaction aggravates the spread and combustion of the fire. However, the amount of heptafluoropropane stored in general gas fire storage bottles is limited. Heptafluoropropane is sprayed out from the pipe nozzle, which is not enough for battery combustion; at the same time, although heptafluoropropane will cause temporary hypoxia in the energy storage container, However, the combustion of the battery is through the chemical reaction of the electrolyte and does not require the presence of oxygen alone. When the energy storage battery burns, the fire prevention and extinguishing effect of this type of gas fire suppression system is limited, or even invalid.

Images