JPH11169475A - Fire extinguishing device for lithium secondary battery storehouse - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire extinguishing device for a lithium secondary battery storehouse excellent in safety. SOLUTION: A fire extinguishing equipment for the lithium secondary battery storehouse is a fire extinguishing device for the lithium secondary battery storehouse for keeping plural lithium secondary batteries and is composed of a keeping position detection means for detecting the keeping position of the battery in the case that abnormality is generated in the lithium secondary battery kept inside the storehouse, a fire extinguishing means for performing the primary fire extinguishment of the battery at the keeping position, a fire extinguishing box capable of performing the secondary fire extinguishment of the battery in a tightly sealed space and a moving means for moving the battery from the keeping position into the fire extinguishing box after the primary fire extinguishment. That is, by performing the primary fire extinguishment at the keeping position of the battery and then performing the secondary fire extinguishment inside the fire extinguishing box, a fire scale is minimized and the safety is more excellent as the fire extinguishing device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguishing system for a storage for storing lithium secondary batteries.

[0002]

BACKGROUND OF THE INVENTION In recent years,
Lithium secondary batteries (hereinafter also simply referred to as batteries) are being widely used as power sources for mobile phones and electronic terminals. In recent years, from the viewpoint of battery performance such as discharge capacity and cycle characteristics, the above-mentioned lithium secondary battery has a negative electrode made of a carbon material, a positive electrode made of a lithium transition metal composite oxide, and a polymer disposed between the negative electrode and the positive electrode. In general, a combination of a porous film-like separator made of a non-aqueous electrolyte containing an organic solvent and a lithium salt is used.

By the way, in order to discover defective products such as internal short-circuits after the lithium secondary battery is manufactured and before it is shipped, a large amount of charged lithium secondary batteries must be charged to 10 batteries.
May be kept in one place for ~ 20 days. At this time, if the stored lithium secondary battery contains a defective product such as one with an internal short circuit, the defective battery may be ignited due to heat generation due to runaway chemical reaction inside the battery. May be. As mentioned earlier, non-aqueous electrolytes are used in lithium secondary batteries, but many organic solvents in non-aqueous electrolytes are flammable, and this heat is ignited by heat generation. It is. In addition, during storage, the non-aqueous electrolyte leaks from the lithium secondary battery, and the storage may become a flammable atmosphere, and the flammable atmosphere may further increase the fire scale.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a fire extinguishing system for a lithium secondary battery storage which can minimize a fire scale and is excellent in safety. It is.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a fire extinguisher for a lithium secondary battery storage for storing a plurality of lithium secondary batteries, wherein an abnormality is detected in the lithium secondary battery stored in the storage. Storage position detecting means for detecting a storage position of the battery when it occurs, fire extinguishing means for performing primary fire extinguishing of the battery at the storage position, and a fire extinguishing box capable of performing secondary fire extinguishing of the battery in an enclosed space This problem is solved by a fire extinguisher for a lithium secondary battery storage, comprising: a moving means for moving the battery from a storage position into a fire extinguishing box after primary fire extinguishing.

That is, when an abnormality occurs in a battery, the fire extinguisher of the present invention first performs primary fire extinguishing at the position where the battery is stored, and then moves the battery to the fire extinguishing box to cause secondary fire in the fire extinguishing box. It is a device that can extinguish a fire. In the case of lithium secondary batteries, if the chemical reaction inside the battery does not stop even after the primary fire extinguishing, there is a high possibility of reignition.Therefore, by performing secondary fire extinguishing in a closed space called a fire extinguishing box after the primary fire extinguishing This is a fire extinguisher for a lithium secondary battery storage which can minimize the fire scale and is more safe.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A fire extinguishing procedure by the fire extinguishing apparatus of the present invention and details of the fire extinguishing apparatus will be described below. First, when an abnormality such as a fire or abnormal heat generation before the fire occurs in the lithium secondary battery stored in the storage, the storage position of the abnormal battery is detected by the detecting means. In the present invention, the detection means is not particularly limited. For example, the detection means detects the fire of the battery by smoke to detect the storage position of the battery, or detects the fire or abnormal heat generation of the battery by the temperature to detect the battery. A device that detects the storage position can be used. Further, a detecting means combining these may be used.

When the storage position of the abnormal battery is detected by the detection means as described above, the fire extinguishing means performs primary fire extinguishing at the storage position in response to a detection signal from the detection means. In the present invention, the fire extinguishing means may be arranged at a fixed position, for example, in the entire storage, and in that case, especially in terms of economy, the fire extinguishing means is arranged near the fire position in the fire extinguishing means. It is preferred that only what is done be activated. Further, the fire extinguishing means may be provided so as to be movable in the entire storage, and in that case, the fire extinguishing means is moved to the storage position detected by the detecting means to perform primary fire extinguishing.

When the primary fire extinguishing by the fire extinguishing means is completed as described above, the battery in which the abnormality has occurred by the moving means is moved into the fire extinguishing box. More specifically, according to a detection signal from the detecting means, the moving means first moves to the storage position of the battery in which the abnormality has occurred, and holds the battery after completion of the primary fire extinguishing by the holding part of the moving means to the inside of the fire extinguishing box. Move. Then, after placing the battery in the fire box, the moving means stops holding the battery and leaves the fire box.

In the present invention, the moving means is not particularly limited as long as it can hold the battery and can move the battery into the fire extinguishing box. For example, the fire extinguishing means can move the entire storage. In such a case, the moving means and the fire extinguishing means may be provided in combination.

The fire-extinguishing box is not particularly limited as long as it can perform secondary fire-extinguishing of the battery contained in the box in a closed space and can prevent spread of fire to the surroundings. The fire extinguisher is surrounded by a fire-resistant wall, a door is provided with a shutter, and a fire extinguishing box is provided with a fire extinguishing nozzle of a fire extinguishing device.

[0012] The fire extinguishing box having the above-mentioned structure preferably includes a sensing means such as a sensor capable of sensing that a battery has been placed in the box by the moving means, and a signal from the sensing means is provided by a signal from the sensing means. Close the door shutter and start secondary fire extinguishing the batteries in the box.

In the present invention, the fire extinguisher used for the primary and secondary fire extinguishing is not particularly limited as long as it is generally used for fire extinguishing. For example, gaseous substances such as carbon dioxide gas and halon gas, water Liquid, such as
Alternatively, a foam of an aqueous solution of sodium carbonate and sodium sulfate may be used. The same fire extinguisher may be used for the primary and secondary fire fighting,
Although another one may be used, in the present invention, it is preferable to use carbon dioxide gas for the primary fire extinguishing, particularly from the viewpoint of the effect on non-fire batteries and the restoration of equipment.

In the present invention, it is preferable that the fire extinguishing box is provided so as to be movable. If the battery can be moved, the battery in which the abnormality has occurred can be put into the fire box and then taken out of the storage box together with the fire box, thereby further reducing the influence on other batteries in the storage box. And it is more secure.

[0015]

The fire extinguisher for a lithium secondary battery storage according to the present invention is a fire extinguisher for a lithium secondary battery storage that stores a plurality of lithium secondary batteries, and is stored in the storage. Storage position detecting means for detecting the storage position of the lithium secondary battery when an abnormality occurs, fire extinguishing means for performing primary fire extinguishing of the battery at the storage position, and secondary fire extinguishing of the battery in an enclosed space And a moving means for moving the battery from the storage position to the inside of the fire extinguishing box after the primary fire extinguishing, it is possible to minimize the scale of the fire and to excel in safety. Further, since the fire extinguishing agent used for the primary fire extinguishing is carbon dioxide gas, the influence on non-fire batteries can be reduced.

Claims (2)

[Claims] 1. A fire extinguisher for a lithium secondary battery storage for storing a plurality of lithium secondary batteries, wherein the storage of the lithium secondary battery when an abnormality occurs in the lithium secondary battery stored in the storage. Storage position detecting means for detecting the position, fire extinguishing means for performing primary fire extinguishing of the battery at the storage position, a fire extinguishing box capable of performing secondary fire extinguishing of the battery in an enclosed space, and the battery after the primary fire extinguishing A fire extinguisher for a lithium secondary battery storage, comprising a moving means for moving from a storage position to a fire extinguishing box. 2. A fire extinguisher for a lithium secondary battery storage according to claim 1, wherein the fire extinguishing agent used for the primary fire extinguishing is carbon dioxide gas.