Perfluorohexanone fire extinguishing device used in battery box

Abstract

The utility model discloses a perfluorohexanone fire extinguishing device used in a battery box, which comprises an outer shell and an inner shell arranged in the outer shell, a perfluorohexanone fire extinguishing agent is arranged in the outer shell, a gas generating agent is arranged in the inner shell, one end of the outer shell is provided with a nozzle end cover, the gas generating agent is in contact with an electric ignition head, and the electric ignition head is in contact with the nozzle end cover. The electric ignition head is connected with the output end of the piezoelectric ceramic through a starting line, an impact piece is arranged on one side of the piezoelectric ceramic and connected with one end of a fusible metal rod through a pull rod, a spring is arranged between the impact piece and the end of the inner shell, and the other end of the fusible metal rod is connected with a fixing part on the surface of the battery box. According to the perfluorohexanone fire extinguishing device, the structure that the fusible metal rod, the impact piece, the piezoelectric ceramic and other parts are matched is designed, so that the problem of starting failure caused by the fact that a traditional thermosensitive wire is prone to aging and failure in a complex environment in a battery is effectively solved, and the starting efficiency and the starting success rate of the perfluorohexanone fire extinguishing device are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy storage fire extinguishing, in particular to a perfluorohexanone fire extinguishing device used in a battery box. Background Art

[0002] With the continuous development of the new energy storage industry, the supporting equipment inside the battery box has gradually increased, resulting in a gradual reduction in the available space inside the battery box. However, new energy batteries themselves have high energy density and great fire hazards. The increase in supporting equipment has undoubtedly aggravated this problem.

[0003] Existing fire extinguishing devices are usually large in size. The 202121858546.2 fire extinguishing device patent mentions a flat perfluorohexanone fire extinguishing device, but the starting component of the fire extinguishing device is a thermistor. The thermistor is prone to aging and failure in the complex environment inside the battery, resulting in failure to start during fire extinguishing, causing safety accidents. Summary of the invention

[0004] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a perfluorohexanone fire extinguishing device for use in a battery box to solve the problems raised in the background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a perfluorohexanone fire extinguishing device for a battery box, comprising an outer shell and an inner shell arranged inside the outer shell, the outer shell is equipped with a perfluorohexanone fire extinguishing agent, the inner shell is provided with a gas generating agent, a nozzle end cover is provided at one end of the outer shell, the gas generating agent is in contact with an electric ignition head, the electric ignition head is connected to the output end of the piezoelectric ceramic through a starting line, an impact piece is provided on one side of the piezoelectric ceramic, the impact piece is connected to one end of a fusible metal rod through a pull rod, a spring is provided between the impact piece and the end of the inner shell, and the other end of the fusible metal rod is connected to a fixed part on the surface of the battery box.

[0006] Preferably, the surface of the fusible metal rod is further provided with a moisture-proof outer skin, and the gap between the moisture-proof outer skin and the surface of the fusible metal rod is filled with a flammable agent.

[0007] More preferably, both ends of the fusible metal rod are provided with connecting heads, and the two connecting heads cooperate with the impact piece and the fixing part respectively.

[0008] More preferably, the fusible metal rod is made of a bismuth-tin low melting point alloy, the flammable agent is an aerosol generating agent powder, and the gas generating agent is an aerosol generating agent powder or a columnar structure formed by pressing the aerosol generating agent powder.

[0009] Preferably, the inner shell is fixed to the surface of the outer shell by a limiting end cover.

[0010] Preferably, a nozzle is provided on the surface of the nozzle end cover, and a pressure relief diaphragm is provided at the nozzle position.

[0011] Preferably, the outer shell is a flat rectangular structure, which is fixedly connected to the inner side of the box cover of the battery box through a mounting plate, and the fixing part is mounted on the inner side of the box cover.

[0012] Preferably, the impact member is a disc structure, one side of which contacts one end of the spring, and the other end of the spring contacts a limiting step provided at the end of the inner shell.

[0013] Beneficial effects of the utility model: The utility model effectively avoids the problem of starting failure caused by aging and failure of traditional thermistor wires in the complex environment inside the battery by designing a structure in which the fusible metal rod, the impact piece and the piezoelectric ceramics are matched, thereby greatly improving the starting efficiency and the starting success rate of the perfluorohexanone fire extinguishing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the internal structure of a perfluorohexanone fire extinguishing device used in a battery box;

[0015] Figure 2 It is a schematic diagram of the structure of the fusible metal rod;

[0016] Figure 3 Schematic diagram of the internal battery structure of the battery box;

[0017] Figure 4 This is a schematic diagram of the structure viewed from above after the battery box cover is installed with a perfluorohexanone fire extinguishing device. DETAILED DESCRIPTION

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figure 1-4 As shown, a perfluorohexanone fire extinguishing device for use in a battery box comprises an outer shell 1 and an inner shell 2 arranged inside the outer shell 1, wherein the outer shell 1 is provided with a perfluorohexanone fire extinguishing agent 3, the inner shell 2 is provided with a gas generating agent 4, a nozzle end cover 5 is provided at one end of the outer shell 1, the gas generating agent 4 is in contact with an electric ignition head 6, the electric ignition head 6 is connected to the output end of a piezoelectric ceramic 7 through a starting line, a striking member 8 is provided on one side of the piezoelectric ceramic 7, the striking member 8 is connected to one end of a fusible metal rod 10 through a pull rod 9, a spring 11 is provided between the striking member 8 and the end of the inner shell 2, and the other end of the fusible metal rod 10 is connected to a fixing portion 13 on the surface of a battery box 12.

[0020] Preferably, the surface of the fusible metal rod 10 is also provided with a moisture-proof outer skin 14, and the gap between the moisture-proof outer skin 14 and the surface of the fusible metal rod 10 is filled with a flammable agent. With such a design, when a fire occurs, the flame temperature will cause the flammable agent to burn, and the heat generated by the combustion will cause the fusible metal rod 10 to be melted and broken, thereby releasing the limiting effect on the pull rod 9, so that the impact member 8 flies downward under the elastic force of the spring 11 and hits the piezoelectric ceramic 7. The piezoelectric ceramic 7 is started after being hit and generates an induced current, which is conducted to the electric ignition head 6 through the starting line to make it work, thereby igniting the gas generating agent 4. More preferably, the electric ignition head 6 adopts a bridgeless ignition head. Since there is a certain gap between the two ignition wires of the bridgeless ignition head, arc jumping will occur after providing a certain current (or induced current) to start the contacted gas generating agent 4.

[0021] More preferably, both ends of the fusible metal rod 10 are provided with connectors 15, and the two connectors 15 are respectively matched with the impact member 8 and the fixing portion 13. Through this structural design of the connector 15, the installation and fixing process of the fusible metal rod 10 is more convenient.

[0022] More preferably, the fusible metal rod 10 is made of a bismuth-tin low melting point alloy, the flammable agent is an aerosol generating agent powder, and the gas generating agent 4 is an aerosol generating agent powder or a columnar structure formed by pressing the aerosol generating agent powder.

[0023] In this embodiment, the aerosol generating agent used in the gas generating agent 4 can be in two states, one is a powdered state, which burns more violently and generates gas quickly, and the other is a pressed charge structure, which burns more steadily and generates gas steadily. In actual production, the aerosol generating agent can be selected according to the actual situation.

[0024] Preferably, the inner shell 2 is fixed to the surface of the outer shell 1 through a limiting end cover 16 .

[0025] Preferably, the nozzle end cover 5 has a nozzle on its surface, and a pressure relief diaphragm 17 is provided at the nozzle position. After the pressure relief diaphragm 17 is provided, it can prevent moisture in the air from entering the outer shell 1 through the nozzle during normal storage and transportation of the fire extinguishing device, causing the perfluorohexanone fire extinguishing agent 3 to absorb moisture. In addition, during the fire extinguishing process, when the air pressure inside the outer shell 1 increases, the pressure relief diaphragm 17 is easily broken, and the normal spraying process of the nozzle is not affected.

[0026] Preferably, if Figure 4 As shown, the outer shell 1 is a flat rectangular parallelepiped structure, which is fixedly connected to the inner side of the box cover 17 of the battery box 12 through the mounting plate 18, and the fixing part 13 is installed on the inner side of the box cover 19. The outer shell 1 is designed to be such a flat structure, which can facilitate the installation of the entire fire extinguishing device in the battery box 12, and the flat structure can adapt to the narrow installation environment inside the battery box 12.

[0027] Preferably, the impact member 8 is a disc structure, one side of which contacts one end of the spring 11 , and the other end of the spring 11 contacts a limiting step provided at the end of the inner shell 2 .

[0028] More preferably, the inner shell 2 is a fragile plastic shell structure, and the gas generating agent 4 is located in a closed cavity inside the inner shell 2. Only a wire hole for passing a starting wire is retained at the top of the closed cavity. When the gas generating agent 4 is ignited to generate gas, as the pressure inside the cavity increases, the inner shell 2 bursts after reaching a certain pressure, allowing the gas to enter the outer shell 2.

[0029] The working principle of the utility model is as follows:

[0030] When a fire occurs, the flame temperature will cause the flammable agent to burn, and the heat generated by the combustion will cause the fusible metal rod 10 to melt and break, thereby releasing the limiting effect on the pull rod 9, causing the impact member 8 to fly downward under the elastic force of the spring 11 and hit the piezoelectric ceramic 7. The piezoelectric ceramic 7 is started after being hit and generates an induced current, which is transmitted to the electric ignition head 6 through the starting line to make it work, thereby igniting the gas generating agent 4. The gas generating agent 4 generates a large amount of gas, causing the inner shell 2 to be compressed and burst, thereby allowing the gas to enter the outer shell 1, increasing the internal pressure of the outer shell 1, and finally pushing the perfluorohexanone fire extinguishing agent 3 to be ejected from the nozzle position of the nozzle end cover 5 to carry out the fire extinguishing process.

[0031] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A perfluorohexanone fire extinguishing device for use in a battery box, comprising an outer shell (1) and an inner shell (2) arranged inside the outer shell (1), wherein a perfluorohexanone fire extinguishing agent (3) is arranged inside the outer shell (1), a gas generating agent (4) is arranged inside the inner shell (2), and a nozzle end cover (5) is arranged at one end of the outer shell (1), characterized in that: The gas generating agent (4) contacts the electric ignition head (6), and the electric ignition head (6) is connected to the output end of the piezoelectric ceramic (7) through a starting line. A striking piece (8) is provided on one side of the piezoelectric ceramic (7), and the striking piece (8) is connected to one end of a fusible metal rod (10) through a pull rod (9). A spring (11) is provided between the striking piece (8) and the end of the inner shell (2), and the other end of the fusible metal rod (10) is connected to a fixing portion (13) on the surface of a battery box (12).

2. A perfluorohexanone fire extinguishing device for use in a battery box according to claim 1, characterized in that: The surface of the fusible metal rod (10) is also provided with a moisture-proof outer skin (14), and the gap between the moisture-proof outer skin (14) and the surface of the fusible metal rod (10) is filled with a flammable agent.

3. A perfluorohexanone fire extinguishing device for use in a battery box according to claim 2, characterized in that: Connectors (15) are provided at both ends of the fusible metal rod (10), and the two connectors (15) respectively cooperate with the impact piece (8) and the fixing portion (13).

4. A perfluorohexanone fire extinguishing device for use in a battery box according to claim 2, characterized in that: The fusible metal rod (10) is made of a bismuth-tin low melting point alloy, the flammable agent is an aerosol generating agent powder, and the gas generating agent (4) is an aerosol generating agent powder or a columnar structure formed by pressing the aerosol generating agent powder.

5. A perfluorohexanone fire extinguishing device for use in a battery box according to claim 1, characterized in that: The inner shell (2) is fixed to the surface of the outer shell (1) via a limiting end cover (16).

6. A perfluorohexanone fire extinguishing device for use in a battery box according to claim 1, characterized in that: The nozzle end cover (5) has a nozzle formed on its surface, and a pressure relief diaphragm (17) is provided at the nozzle position.

7. A perfluorohexanone fire extinguishing device for use in a battery box according to claim 1, characterized in that: The outer shell (1) is a flat rectangular parallelepiped structure, which is fixedly connected to the inner side of a box cover (19) of a battery box (12) via a mounting plate (18), and the fixing portion (13) is mounted on the inner side of the box cover (19).

8. A perfluorohexanone fire extinguishing device for use in a battery box according to claim 1, characterized in that: The impact member (8) is a disc structure, one side of which contacts one end of a spring (11), and the other end of the spring (11) contacts a limiting step provided at the end of the inner shell (2).

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