Fire extinguishing device capable of spraying for multiple times and continuously cooling and control method

Abstract

The fire extinguishing device comprises a main conveying pipeline and a main controller, the main conveying pipeline is externally connected with a high-pressure fire extinguishing agent supply source, the tail end of the main conveying pipeline is connected with a plurality of groups of spraying pipes, each group of spraying pipes is provided with a plurality of nozzles, and each group of spraying pipes is provided with a valve. And the signal output end of the main controller is connected with the valve controller and the pressure reducing valve controller. The battery module has the beneficial effects that the after-combustion risk is extremely low, and heat radiation to surrounding batteries is reduced by absorbing heat of the thermal runaway battery, so that heat spreading in the battery module is prevented, and explosion is prevented.

Description

technical field [0001] The invention relates to a fire-extinguishing device and a control method for continuous cooling by multiple injections. Background technique [0002] In recent years, electrochemical energy storage represented by lithium-ion batteries has developed rapidly due to its advantages such as high energy storage density and power density, high efficiency, rapid technological progress, and great development potential. A number of lithium-ion battery energy storage power stations have been established at home and abroad. The high energy density of lithium-ion batteries also leads to potential fire hazards. Once thermal runaway occurs, it is easy to cause thermal diffusion, and the diffusion speed is very fast. In the prior art, in order to extinguish the fire caused by the lithium ion battery in time, one solution is to spray a large dose of cooling extinguishing agent at one time to suppress and extinguish the fire. The pressure of the battery box will incr...

AI Technical Summary

Problems solved by technology

In the prior art, in order to extinguish the fire caused by lithium-ion batteries in time, one solution is to spray a large dose of cooling fire extinguishing agent at one time to suppress and extinguish the fire. However, once a large amount of cooling fire extinguishing agent is quickly sprayed into the battery box, the battery box will The pressure will increase rapidly again, causing the explosion-proof valve of the battery box to automatically open for pressure relief, and then the battery box that was originally in a closed state will become open, and the outside oxygen can enter the box, which will increase the oxygen content in the battery box, which is extremely dangerous. It may cause the fire inside the box to spread outside the box, causing greater losses

Another solution is to configure multiple fire extinguishing devices in the system to achieve multiple spraying of chemicals. This solution is closely related to the number of fire extinguishing devices, and the cost is high, which is not conducive to popularization and application.

The agent of the fire extinguishing device in the two schemes is a single spraying, after the spraying is completed, the fire extinguishing device can no longer be used

After the lithium-ion battery fire is extinguished, it is very easy to re-ignite within a short period of time. When the fire re-ignites, the cooling fire extinguishing agent has been sprayed, and the fire prevention and control device at this time cannot suppress the re-ignition fire again.

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