Explosion-proof strategy for battery prefabricated cabin of lithium iron phosphate energy storage power station

Abstract

The invention belongs to the field of a lithium iron phosphate energy storage power station and particularly relates to an explosion-proof strategy for a battery prefabricated cabin of the lithium iron phosphate energy storage power station. The explosion-proof strategy comprises steps that a first threshold value and a second threshold value of a combustible gas detection alarm system are set; when a detection value of the combustible gas detection alarm system reaches a first threshold value, a BMS battery management system is linked to start an explosion-proof electric fan; when the combustible gas detection alarm system reaches a second threshold value, after the BMS detects tripping of a PCS circuit breaker, the BMS closes the explosion-proof electric fan and starts a fire extinguishing system at the same time. The explosion-proof strategy is advantaged in that dual purposes of fire extinguishing and temperature control can be achieved, and explosion prevention of a lithium iron phosphate power station battery is achieved.

Description

technical field [0001] The invention belongs to the field of lithium iron phosphate energy storage power stations, and in particular relates to an explosion-proof strategy for battery prefabricated cabins of lithium iron phosphate energy storage power stations. Background technique [0002] At present, the battery used in the lithium battery energy storage compartment is a lithium iron phosphate battery. When the BMS management of the battery management system fails or a single battery in the battery module is overcharged, some single batteries fail to be overcharged, and the battery body The casing is deformed; when the internal pressure reaches the operating pressure value of the safety valve of the single battery, the safety diaphragm of the single battery bursts. The combustible steam and combustible gas generated in the single battery at high temperature overflow from the safety valve. When the overflowing combustible liquid vapor and combustible gas encounter an open f...

AI Technical Summary

Problems solved by technology

[0004] However, there are technical problems and shortcomings in the existing technical scheme: if the inertization scheme is adopted, a large amount of gas is required; the anti-explosion design is undoubtedly to increase the thickness of the box and the structural design without limit; the explosion-venting design is adopted When it is necessary to design the structure of the larger pressure relief surface of the box

The above design is difficult to implement in the project, and the design scheme is relatively simple

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