New energy battery box with perfluorohexanone fire extinguishing device

Abstract

The utility model discloses a new energy battery box with perfluorohexanone fire extinguishing apparatus, including battery box and fire extinguishing apparatus arranged inside battery box, the fire extinguishing apparatus includes outer shell and inner shell arranged inside outer shell, perfluorohexanone fire extinguishing agent is filled in the outer shell, gas generating agent is filled in the inner shell, the gas generating agent is filled in the inner shell, and the outer shell is filled with the perfluorohexanone fire extinguishing agent and the inner shell is filled with the perfluorohexanone fire extinguishing agent. A nozzle end cover is arranged at one end of the outer shell, the gas generating agent makes contact with an electric ignition head, the electric ignition head is connected with the output end of 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, and a spring is arranged between the impact piece and the end of the inner shell. The other end of the fusible metal rod is connected with a fixing part on the surface of the battery box, and a battery connecting cable local area in the battery box comprises the fusible metal rod; according to the utility model, the starting efficiency and the starting success rate of the perfluorohexanone fire extinguishing device are greatly improved; and the problem that the battery box is continuously overheated due to the continuation of the charging and discharging process of the battery is avoided.

Description

Technical Field

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

[0004] In addition, when a fire or thermal runaway occurs in the battery box, it is necessary to disconnect the circuit where the battery is located in time to stop the battery from working, so as to avoid the charging and discharging process from exacerbating the hazard of the fire; however, the battery management system that comes with the battery may fail at high temperatures and be unable to disconnect the circuit to stop the battery from working, causing the battery box to continue to overheat, posing a safety hazard. Summary of the invention

[0005] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a new energy battery box equipped with a perfluorohexanone fire extinguishing device to solve the problems raised in the background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a new energy battery box equipped with a perfluorohexanone fire extinguishing device, including a battery box and a fire extinguishing device arranged inside the battery box, the fire extinguishing device including 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 a 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, the other end of the fusible metal rod is connected to a fixed part on the surface of the battery box, and a local area of ​​the battery connection cable inside the battery box includes a fusible metal rod.

[0007] 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.

[0008] Preferably, both ends of the fusible metal rod are provided with connecting heads, and the two connecting heads are respectively matched with the impact piece and the fixing part.

[0009] 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.

[0010] Preferably, the inner shell is fixed to the surface of the outer shell by a limiting end cover.

[0011] Preferably, a nozzle is provided on the surface of the nozzle end cover, and a pressure relief diaphragm is provided at the nozzle position.

[0012] 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.

[0013] 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.

[0014] Preferably, the connection cables of the batteries inside the battery box are composed of a plurality of fusible metal rods connected in series through their connectors and wires.

[0015] The beneficial effects of the utility model are as follows: 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; and in the event of a fire, the fusible metal rod in the connecting cable will be melted due to the high temperature, and then the connecting cable will be disconnected, thereby promptly disconnecting the circuit where the battery is located, causing the battery to stop working, thereby avoiding the problem of continuous overheating of the battery box due to the continuation of the battery charging and discharging process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the internal structure of a new energy battery box equipped with a perfluorohexanone fire extinguishing device;

[0017] Figure 2 This is a schematic diagram of the structure when the cover of the battery box is installed with a perfluorohexanone fire extinguishing device;

[0018] Figure 3 for Figure 2 Schematic diagram of the internal structure of the perfluorohexanone fire extinguishing device;

[0019] Figure 4 It is a schematic diagram of the structure of the fusible metal rod. DETAILED DESCRIPTION

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] like Figure 1-4 As shown, a new energy battery box provided with a perfluorohexanone fire extinguishing device includes a battery box 12 and a fire extinguishing device arranged inside the battery box 12, the fire extinguishing device includes an outer shell 1 and an inner shell 2 arranged inside the outer shell 1, 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, the other end of the fusible metal rod 10 is connected to a fixing portion 13 on the surface of the battery box 12, and a local area of ​​the battery connection cable inside the battery box 12 includes the fusible metal rod 10.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] Preferably, the inner shell 2 is fixed to the surface of the outer shell 1 through a limiting end cover 16 .

[0027] 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.

[0028] Preferably, the outer shell 1 is a flat rectangular parallelepiped structure, which is fixedly connected to the inner side of the box cover 19 of the battery box 12 through the mounting plate 18, and the fixing portion 13 is mounted on the inner side of the box cover 19. Designing the outer shell 1 into such a flat structure can facilitate the installation of the entire fire extinguishing device in the battery box 12, and such a flat structure can adapt to the narrow installation environment inside the battery box 12.

[0029] 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 .

[0030] Preferably, the connection cable of the battery inside the battery box 12 is connected in series by a plurality of fusible metal rods 10 through their connectors 15 and electric wires. With such a design, as long as one of the fusible metal rods 10 in the connection cable is melted due to high temperature, the connection cable will be disconnected, thereby disconnecting the circuit where the battery is located in time, so that the battery stops working.

[0031] 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.

[0032] The working principle of the utility model is as follows:

[0033] 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, so that the impact piece 8 will fly downward under the elastic force of the spring 11 and hit the piezoelectric ceramic 7. The piezoelectric ceramic 7 will start after being hit and generate an induced current, which will be 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 will generate a large amount of gas, causing the inner shell 2 to be compressed and burst, so that the gas will 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. By designing a structure in which the fusible metal rod, the impact piece and the piezoelectric ceramic and other components are matched, the problem of the traditional thermistor wire being easily aged and failed in the complex environment inside the battery, which leads to the failure of starting, is effectively avoided, which greatly improves the starting efficiency and success rate of the perfluorohexanone fire extinguishing device.

[0034] In addition, in the above process, as long as one of the fusible metal rods 10 in the connecting cable is melted due to high temperature, the connecting cable will be disconnected, thereby promptly disconnecting the circuit where the battery is located, causing the battery to stop working, thereby avoiding the problem of continuous overheating of the battery box due to the continuation of the battery charging and discharging process.

[0035] 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 new energy battery box provided with a perfluorohexanone fire extinguishing device, comprising a battery box (12) and a fire extinguishing device arranged inside the battery box (12), the fire extinguishing device comprising an outer shell (1) and an inner shell (2) arranged inside the outer shell (1), the outer shell (1) containing a perfluorohexanone fire extinguishing agent (3), the inner shell (2) containing a gas generating agent (4), and a nozzle end cover (5) 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). The other end of the fusible metal rod (10) is connected to a fixing portion (13) on the surface of a battery box (12), and a local area of ​​a battery connection cable inside the battery box (12) includes the fusible metal rod (10).

2. A new energy battery box equipped with a perfluorohexanone fire extinguishing device 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 new energy battery box equipped with a perfluorohexanone fire extinguishing device 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 new energy battery box equipped with a perfluorohexanone fire extinguishing device 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 new energy battery box equipped with a perfluorohexanone fire extinguishing device 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 new energy battery box equipped with a perfluorohexanone fire extinguishing device 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 new energy battery box equipped with a perfluorohexanone fire extinguishing device 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 new energy battery box equipped with a perfluorohexanone fire extinguishing device 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).

9. A new energy battery box equipped with a perfluorohexanone fire extinguishing device according to claim 3, characterized in that: The connection cables of the batteries inside the battery box (12) are composed of a plurality of fusible metal rods (10) connected in series via their connectors (15) and electric wires.

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