Lithium battery with fire extinguishing function

Abstract

The utility model provides a lithium battery with a fire extinguishing function, which belongs to the field of lithium batteries and comprises a shell, an external connection plate is mounted at the rear end of the shell, a lithium battery is mounted in the shell, a cover plate is mounted at the top end of the shell, and a condensed aerosol fire extinguishing device is mounted at the top end of the cover plate. The condensed aerosol fire extinguishing device comprises a mounting box, a condensed aerosol fire extinguishing module and a detection line, the mounting box is mounted on the inner wall of the cover plate and matched with the lithium battery, and the condensed aerosol fire extinguishing module is mounted in the shell and located at the outer end of the lithium battery. The cover plate seals the shell to prevent the lithium battery from falling or being affected with damp and losing efficacy, so that a subsequent user can conveniently connect equipment for use and power supply, in the use process, the detection line and the condensed aerosol fire extinguishing module detect the lithium battery, and when the lithium battery is overloaded and burnt, the condensed aerosol fire extinguishing module extinguishes fire of the burnt lithium battery.

Description

Technical Field

[0001] The utility model relates to the field of lithium batteries, in particular to a lithium battery with a fire extinguishing function. Background Art

[0002] As a mainstream energy storage device, lithium batteries are widely used in mobile phones, laptops, electric vehicles, electric bicycles, home energy storage, telecommunications base station energy storage and other fields. However, lithium battery fire accidents have occurred frequently for a long time, causing serious harm and loss to people’s lives and property. Therefore, the prevention and early treatment of lithium battery fire accidents are extremely important.

[0003] Existing lithium batteries for telecommunication base station energy storage lack the fire extinguishing technology of the products themselves. When a fire occurs inside the lithium battery due to a cell failure, the products themselves are unable to intervene effectively and carry out early processing. After the lithium battery catches fire, it will burn violently and cause other equipment in the same cabinet to catch fire and burn, causing serious economic losses to the communication operators. At the same time, it will cause the loss of communication signals in some areas, which may cause greater safety hazards.

[0004] Therefore, it is necessary to provide a lithium battery with fire extinguishing function to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a lithium battery with fire extinguishing function.

[0006] The utility model provides a lithium battery with a fire extinguishing function, comprising a shell, an external board is installed at the rear end of the shell, a lithium battery is installed inside the shell, a cover plate is installed at the top of the shell, and a hot aerosol fire extinguishing device is installed at the top of the cover plate; the hot aerosol fire extinguishing device comprises an installation box, a hot aerosol fire extinguishing module and a detection line, the installation box is installed on the inner wall of the cover plate and is adapted to the lithium battery, the hot aerosol fire extinguishing module is installed inside the shell and is located at the outer end of the lithium battery, the hot aerosol fire extinguishing module is adapted to the lithium battery, the number of the hot aerosol fire extinguishing modules is multiple and is equidistantly arranged, the detection line is installed at the top of the lithium battery and is connected to the hot aerosol fire extinguishing module and the installation box.

[0007] Preferably, the external plate comprises a plate body, the plate body is mounted on the rear end of the shell, and the rear end of the plate body is fixedly connected with a plurality of handles which are symmetrically distributed.

[0008] Preferably, a circuit board is fixedly connected to the front side of the plate body and located at the rear end of the lithium battery, and the circuit board is electrically connected to the lithium battery.

[0009] Preferably, a control button is installed at the rear end of the board body, and the control button is electrically connected to the circuit board. A display screen is installed at the rear end of the board body, and the display screen is electrically connected to the circuit board.

[0010] Preferably, a battery switch is installed at the rear end of the board body, and the battery switch is electrically connected to the circuit board. A display screen switch is installed at the rear end of the board body, and the display screen switch is electrically connected to the circuit board.

[0011] Preferably, an external circuit socket is installed at the rear end of the board body, and the external circuit socket is electrically connected to the circuit board.

[0012] Compared with the related art, the lithium battery with fire extinguishing function provided by the utility model has the following advantages:

[0013] Beneficial effects:

[0014] 1. A lithium battery with a fire extinguishing function. During use, the detection line and the hot aerosol fire extinguishing module detect the lithium battery. When the lithium battery is overloaded and burns, the hot aerosol fire extinguishing module extinguishes the burning lithium battery.

[0015] 2. A lithium battery with a fire extinguishing function. The display screen is turned on by the display screen switch, the battery switch connects the circuit between the circuit board and the lithium battery, and the external device is connected to the circuit board through the external line socket, so the lithium battery can be used to power the external device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model when viewed from above;

[0017] Figure 2 It is a schematic diagram of the overall test structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the overall front structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the utility model after the integral cover is opened;

[0020] Numbers in the figure: 1. Shell; 2. External board; 3. Lithium battery; 4. Cover; 5. Hot aerosol fire extinguishing device; 201. Board; 202. Handle; 203. Control button; 204. Display screen; 205. Battery switch; 206. External line socket; 207. Display screen switch; 208. Circuit board; 501. Installation box; 502. Hot aerosol fire extinguishing module; 503. Detection line. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 4 , a lithium battery with a fire extinguishing function provided by an embodiment of the utility model comprises a shell 1, an external board 2 is installed at the rear end of the shell 1, a lithium battery 3 is installed inside the shell 1, a cover plate 4 is installed at the top of the shell 1, and a hot aerosol fire extinguishing device 5 is installed at the top of the cover plate 4; the hot aerosol fire extinguishing device 5 comprises an installation box 501, a hot aerosol fire extinguishing module 502 and a detection line 503, the installation box 501 is installed on the inner wall of the cover plate 4 and is adapted to the lithium battery 3, the hot aerosol fire extinguishing module 502 is installed inside the shell 1 and is located at the outer end of the lithium battery 3, the hot aerosol fire extinguishing module 502 is adapted to the lithium battery 3, the number of the hot aerosol fire extinguishing modules 502 is multiple and is equidistantly arranged, the detection line 503 is installed at the top of the lithium battery 3 and is connected to the hot aerosol fire extinguishing module 502 and the installation box 501;

[0023] The lithium battery 3 is installed through the shell 1, the external board 2 is convenient for connecting external devices, and the cover plate 4 seals the shell 1 to prevent the lithium battery 3 from falling or becoming damp and failing, so as to facilitate subsequent users to connect the device for power supply. During use, the detection line 503 and the hot aerosol fire extinguishing module 502 detect the lithium battery 3. When the lithium battery 3 is overloaded and burns, the hot aerosol fire extinguishing module 502 extinguishes the burning lithium battery 3. The hot aerosol fire extinguishing module 502 is a special fire extinguishing agent, which is a solvent formed by gas as a dispersion medium and liquid or solid as a dispersed medium. Aerosol fire extinguishing agents are colloidal substances that produce aerosols with fire extinguishing efficiency through combustion or other means. When the fire extinguishing agent encounters a fire source, the chemical components in the aerosol fire extinguishing agent will undergo a chemical reaction to produce a large amount of inert gas (such as nitrogen and carbon dioxide). These gases will quickly spread in the protected area, reducing the oxygen concentration to below the flammable limit, thereby extinguishing the fire source and preventing the fire from spreading. The aerosol fire extinguishing system uses stable gas to release the aerosol fire extinguishing agent into the protected area, forming an instantaneous ionized gas, and forming a cold smoke-like fire extinguishing agent in the protected area to achieve the purpose of fire extinguishing;

[0024] In addition, if the aerosol fire extinguishing agent contains substances such as dodecafluorooctane (HFC-227ea), its gas molecules will form an ionized gas in the air, further achieving the fire extinguishing effect;

[0025] on the one hand

[0026] On the one hand, it is the cooling effect of endothermic decomposition, and on the other hand, it is the chemical inhibition of gas phase and solid phase, which work synergistically with each other. In addition, the gas phase components in the aerosol fire extinguishing agent product also play a certain auxiliary role.

[0027] ⑴ Cooling and fire extinguishing effect of endothermic decomposition

[0028] The cooling effect of hot aerosol fire extinguishing agents mainly relies on the endothermic decomposition of four metal oxides and carbonates.

[0029] The amount of heat released by any fire in a short period of time is limited. If the solid particles in the aerosol can absorb part of the heat released by the fire source in a short period of time, the temperature of the flame will be reduced, the heat radiated to the combustion surface and used to break down the vaporized combustible molecules into free radicals will be reduced, and the combustion reaction will be inhibited to a certain extent.

[0030] ⑵Gas phase chemical inhibition

[0031] Under the action of heat, the gasified metal ions such as Sr, K, Mg or cations that have lost electrons from the hot aerosol extinguishing and decomposition exist in the form of steam, and undergo multiple chain reactions with the active groups H·, ·OH and O· in the combustion. The following takes Sr as an example:

[0032] Sr+2·OH→Sr(OH)Sr+O·→SrO Sr(OH)2+2H→Sr+2H2O

[0033] This process is repeated many times, and the active groups in combustion are consumed in large quantities, the concentration continues to decrease, and combustion is suppressed.

[0034] ⑶Solid phase chemical inhibition

[0035] The solid particles in the hot aerosol fire extinguishing agent can adsorb the chain reaction intermediates OH, H and O, and catalyze them to reconstitute stable molecules, thereby terminating the branch chain reaction of the combustion process. Taking K as an example, it is as follows:

[0036] K2O(s)+2H(g)→2KOH(s)KOH(s)+OH(s)→KO(s)+H2O(s)

[0037] K2O(s)+O(g)→2KO KO(s)+H(g)→KOH

[0038] In the above-mentioned fire extinguishing effect, several fire extinguishing mechanisms interact and work synergistically, but the gas transmission effect and the heat absorption and cooling effect of metal oxides or carbonates only play an auxiliary effect, and the main fire extinguishing effect still depends on the chemical inhibition of gas and solid phases.

[0039] The external board 2 includes a board body 201 , which is mounted on the rear end of the housing 1 , and a plurality of symmetrically distributed handles 202 are fixedly connected to the rear end of the board body 201 .

[0040] A circuit board 208 is fixedly connected to the front side of the plate body 201 and located at the rear end of the lithium battery 3 . The circuit board 208 is electrically connected to the lithium battery 3 .

[0041] A control button 203 is installed at the rear end of the board body 201 , and the control button 203 is electrically connected to the circuit board 208 . A display screen 204 is installed at the rear end of the board body 201 , and the display screen 204 is electrically connected to the circuit board 208 .

[0042] A battery switch 205 is installed at the rear end of the board body 201 , and the battery switch 205 is electrically connected to the circuit board 208 . A display screen switch 207 is installed at the rear end of the board body 201 , and the display screen switch 207 is electrically connected to the circuit board 208 .

[0043] An external circuit jack 206 is installed at the rear end of the board body 201, and the external circuit jack 206 is electrically connected to the circuit board 208;

[0044] The display screen 204 is turned on by the display screen switch 207, the battery switch 205 connects the circuit between the circuit board 208 and the lithium battery 3, and the external device is connected to the circuit board 208 through the external line socket 206, so that the lithium battery 3 can be used to power the external device.

[0045] When working, first turn on the display screen 204 through the display screen switch 207, then turn on the battery switch 205 to connect the circuit between the circuit board 208 and the lithium battery 3, and connect the external device to the circuit board 208 through the external line socket 206. At this time, the lithium battery 3 supplies power to the external device. During use, the detection line 503 and the hot aerosol fire extinguishing module 502 detect the lithium battery 3. When the lithium battery 3 is overloaded and burned, the hot aerosol fire extinguishing module 502 extinguishes the burning lithium battery 3. The hot aerosol fire extinguishing module 502 is a special fire extinguishing agent, which uses gas as a dispersion medium and liquid as a liquid. Aerosol fire extinguishing agents are sol-like substances formed by dispersed media. Aerosol fire extinguishing agents produce aerosols with fire extinguishing efficiency through combustion or other means. When the fire extinguishing agent encounters a fire source, the chemical components in the aerosol fire extinguishing agent will undergo a chemical reaction to produce a large amount of inert gases (such as nitrogen and carbon dioxide). These gases will quickly spread in the protected area, reducing the oxygen concentration to below the flammable limit, thereby extinguishing the fire source and preventing the fire from spreading. The aerosol fire extinguishing system uses stable gas to release the aerosol fire extinguishing agent into the protected area, forming an instantaneous ionized gas, and forming a cold smoke-like fire extinguishing agent in the protected area to achieve the purpose of fire extinguishing.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery with fire extinguishing function, characterized in that: It comprises a shell (1), an external connection plate (2) is installed at the rear end of the shell (1), a lithium battery (3) is installed inside the shell (1), a cover plate (4) is installed at the top end of the shell (1), and a hot aerosol fire extinguishing device (5) is installed at the top end of the cover plate (4); The hot aerosol fire extinguishing device (5) comprises a mounting box (501), a hot aerosol fire extinguishing module (502) and a detection line (503); the mounting box (501) is mounted on the inner wall of the cover plate (4) and is compatible with the lithium battery (3); the hot aerosol fire extinguishing module (502) is mounted inside the housing (1) and is located at the outer end of the lithium battery (3); the hot aerosol fire extinguishing module (502) is compatible with the lithium battery (3); the number of the hot aerosol fire extinguishing modules (502) is multiple and is arranged at equal distances; the detection line (503) is mounted on the top of the lithium battery (3) and is connected to the hot aerosol fire extinguishing module (502) and the mounting box (501).

2. A lithium battery with fire extinguishing function according to claim 1, characterized in that: The external board (2) comprises a board body (201), the board body (201) is mounted on the rear end of the housing (1), and the rear end of the board body (201) is fixedly connected with a plurality of symmetrically distributed handles (202).

3. A lithium battery with fire extinguishing function according to claim 2, characterized in that: A circuit board (208) is fixedly connected to the front side of the plate body (201) and located at the rear end of the lithium battery (3); the circuit board (208) is electrically connected to the lithium battery (3).

4. A lithium battery with fire extinguishing function according to claim 3, characterized in that: A control button (203) is installed at the rear end of the board body (201), and the control button (203) is electrically connected to the circuit board (208). A display screen (204) is installed at the rear end of the board body (201), and the display screen (204) is electrically connected to the circuit board (208).

5. A lithium battery with fire extinguishing function according to claim 4, characterized in that: A battery switch (205) is installed at the rear end of the board body (201), and the battery switch (205) is electrically connected to the circuit board (208). A display screen switch (207) is installed at the rear end of the board body (201), and the display screen switch (207) is electrically connected to the circuit board (208).

6. A lithium battery with fire extinguishing function according to claim 5, characterized in that: An external circuit socket (206) is installed at the rear end of the board body (201), and the external circuit socket (206) is electrically connected to the circuit board (208).

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