Lithium ion battery energy storage system fire extinguishing device, fire extinguishing nozzle and method

Abstract

The invention discloses a lithium ion battery energy storage system fire extinguishing device, a fire extinguishing nozzle and a method. The device comprises a fire extinguishing pipeline and a plurality of fire extinguishing nozzles, the fire extinguishing nozzles are arranged on the fire extinguishing pipeline, and one end of the fire extinguishing pipeline is connected with a fire extinguishing agent. The fire extinguishing nozzle comprises a nozzle body, one end of the nozzle body is open, the other end is provided with a jet burner, and low-melting-point alloy is arranged at the position close to the jet burner. The fire extinguishing pipeline is arranged above a battery box of a battery energy storage system, and the fire extinguishing nozzle is arranged opposite to each battery module safety valve in the battery box. When a battery module or the battery energy storage system is on fire, high-temperature gas or flame jetted by the battery melts the low-melting-point alloy in the nozzle; the fire extinguishing agent is accurately sprayed to a fired battery safety valve through the fire extinguishing nozzle, open fire is extinguished, and the use amount of the fire extinguishing agent is saved; and after the battery is extinguished, the fire extinguishing nozzle above the accident battery is replaced, other batteries and fire extinguishing pipelines are not influenced, and the maintenance cost is low.

Description

technical field [0001] The invention belongs to the technical field of battery safety protection, and relates to a fire extinguishing device, in particular to a lithium ion battery energy storage system fire extinguishing device, a fire extinguishing nozzle and a method. Background technique [0002] In recent years, with the acceleration of energy transformation and upgrading, the construction and planning of modern smart grid system with energy storage technology and system as the core has attracted more and more attention. Energy storage technology has been widely used in power generation, transmission, All aspects of power distribution and power consumption not only promote the revolution of energy supply in our country, but also are essential core technologies for the realization of smart grid. [0003] The electrochemical energy storage technology represented by lithium-ion batteries has become the energy storage technology with the fastest growing installed capacity i...

AI Technical Summary

Problems solved by technology

Due to the irregular injection port formed by high-temperature melting and cracking, it cannot directly inject the ignition point well

The fire extinguishing effect is poor, the amount of fire extinguishing agent is large, and the ability to inhibit re-ignition is poor

[0007] There are also some lithium-ion battery energy storage power stations that use a fine water mist fire extinguishing system. Although the fire extinguishing system can cool down the battery for a long time, the test shows that the use of fine water mist will temporarily aggravate the battery fire in the early stage of fire extinguishing. At the same time The use of fine water mist will lead to incomplete combustion of the battery, resulting in a large amount of toxic gas and waste liquid

Moreover, since water is a conductor, after the water mist fire extinguishing system operates, the entire energy storage system will be destroyed, and the batteries after fire extinguishing will be difficult to reuse

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