Fire extinguishing method for perfluorohexanone shared by lithium battery electric box and energy storage cabin

Abstract

The invention provides a lithium battery electric box and energy storage cabin shared perfluorohexanone fire extinguishing method, which comprises the following steps that S1, during use, a thermosensitive release device is mounted in a lithium battery electric box, and when the internal temperature of the lithium battery electric box reaches a set value of the thermosensitive release device, the thermosensitive release device is broken; s2, an infusion pump and a three-way valve are started, and the infusion pump pumps the perfluorohexanone fire extinguishing liquid in the liquid storage tank to a liquid conveying main pipe; and S3, injecting the perfluorohexanone fire extinguishing liquid in the second liquid conveying branch pipe into the lithium battery electric box through a liquid outlet pipe so as to realize fire extinguishing operation in the lithium battery electric box. S4, when the whole energy storage battery cabin has a fire disaster, the liquid in the liquid storage tank is pumped into the pipeline through the three-way valve by the liquid pump, wherein the effects of oxygen isolation and continuous cooling are achieved; according to the invention, internal fire extinguishing can be carried out on the lithium battery electric box when the lithium battery electric box is in thermal runaway, and internal fire extinguishing can also be carried out on the energy storage cabin when the energy storage battery cabin is in a fire disaster.

Description

technical field [0001] The invention relates to the technical field of battery thermal runaway suppression, in particular to a perfluorohexanone fire extinguishing method shared by a lithium battery electric box and an energy storage cabin. Background technique [0002] In recent years, electrochemical energy storage has developed rapidly, among which the cumulative installed capacity of lithium-ion batteries is the largest, accounting for more than 90% of electrochemical energy storage. With the introduction of the double carbon policy and the increasing proportion of new energy, the development prospects of energy storage will be very broad . In stark contrast to the development prospects, the relevant standards for electrochemical energy storage have not yet been perfected, integrated energy storage products are uneven, and fire accidents in power stations occur from time to time, casting a shadow over the development of the energy storage industry. [0003] At present, ...

AI Technical Summary

Problems solved by technology

The traditional fire protection scheme has not reached the pack electric box level, and it is impossible to accurately release the fire extinguishing agent to the electric box level battery, realize rapid fire extinguishing, and maintain the long-term cooling function. In view of the unique combustion characteristics of lithium-ion batteries, the traditional fire protection scheme is accurate and effective poor sex;

[0005]2) A large number of experiments have proved that heptafluoropropane is weak in preventing the re-ignition of lithium-ion batteries;

[0006]3) Passive protection is used for fire protection at the cabin level, and the fire warning often only works after the smoke and temperature have spread to the cabin, and cannot work with the battery management system, etc. Parameters to achieve effective linkage

[0007]The above problems have greatly affected the large-scale application and promotion of lithium-ion electrochemical energy storage

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