Fire extinguishing temperature-sensitive nozzle for battery pack

Abstract

The utility model relates to battery pack fire extinguishing device technical field, specifically for a kind of fire extinguishing temperature-sensitive nozzle for battery pack, specifically including body part and nozzle part, body part is connected with the storage tank conveying pipe that stores fire extinguishing agent by pipeline set in body part to nozzle part, body part is provided with connecting part, and connecting part is used to assemble body part in battery pack shell;Nozzle part is equipped with flow channel and the spout connected with flow channel, one end of flow channel is connected with pipeline, and the other end of flow channel is connected with spout;Sealing assembly is equipped in spout, sealing assembly includes temperature-sensitive trigger tube, when the environment temperature where temperature-sensitive trigger tube is located reaches preset value, temperature-sensitive trigger tube bursts, and fire extinguishing agent is ejected from nozzle part along spout;The technical scheme of the application can trigger it to work and can quickly and effectively extinguish the fire in the first time by spraying high-concentration fire extinguishing agent into the battery interior within a few seconds when abnormal high temperature occurs in the battery, with high reliability.

Description

Technical Field

[0001] This utility model relates to the technical field of battery pack fire extinguishing devices, specifically a fire extinguishing temperature-sensing nozzle for battery packs. Background Technology

[0002] With the rapid development of the new energy industry, the safety of power batteries has become a focus of industry attention. According to the new national standard GB38031-2025, battery packs must meet the thermal runaway test standard of "no fire, no explosion." Under this requirement, major automakers have generally optimized their battery management systems and automotive water-cooling systems to improve safety and heat dissipation performance. However, lithium batteries can still experience thermal runaway when subjected to external impacts or extreme temperatures. Traditional fire suppression systems are significantly inadequate in responding to battery fires, necessitating specialized fire extinguishing devices to address the challenge of early suppression.

[0003] Existing battery-powered fire suppression systems rely solely on electrical sensors for detection. However, the lifespan of these sensors is shorter than the designed lifespan of the battery pack, and existing pump-type fire suppression systems require manual activation, while also posing a risk of delayed emergency response.

[0004] Based on this, we will continue to improve the existing fire extinguishing device for battery packs in order to solve the technical defects of the existing technical solutions. Utility Model Content

[0005] The purpose of this utility model is to provide a fire extinguishing temperature-sensing nozzle for battery packs, thereby solving the technical defects of existing fire extinguishing devices for battery packs.

[0006] To address the aforementioned technical deficiencies, this application implements the following technical solution:

[0007] A fire extinguishing temperature-sensing nozzle for a battery pack includes a body and a nozzle head. The nozzle head is connected to a storage tank containing fire extinguishing agent via a pipe disposed within the body. The body is provided with a connecting part for assembling the body onto the battery pack housing.

[0008] The nozzle is provided with a flow channel and a nozzle connected to the flow channel. One end of the flow channel is connected to the pipe, and the other end of the flow channel is connected to the nozzle.

[0009] The nozzle is equipped with a sealing component, which includes a temperature-sensing trigger tube. When the ambient temperature of the temperature-sensing trigger tube reaches a preset value, the temperature-sensing trigger tube bursts, the nozzle is opened, and the extinguishing agent is sprayed out from the nozzle head along the nozzle.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This application uses a sealing assembly composed of a temperature-sensing trigger tube and a ball valve. It does not rely on electrical circuits or electronic sensors. The assembly structure is based on a purely physical principle for fire extinguishing devices used in new energy vehicles, computer rooms, energy storage, and other new energy batteries. As long as there is an abnormally high temperature inside the battery (even under normal conditions before it catches fire), it can be triggered to work and quickly and effectively spray a high concentration of extinguishing agent into the battery to extinguish the fire within seconds. It has high reliability and will not have any technical defects that would affect the fire extinguishing effect due to the failure of electronic components.

[0012] As a further improvement to the fire extinguishing temperature-sensing nozzle for a battery pack of this application, the sealing assembly also includes a ball valve, one end of which is sealed to the flow channel, and the other end of which abuts against the temperature-sensing trigger tube.

[0013] As a further improvement to the fire extinguishing temperature-sensing nozzle for a battery pack of this application, an annular sealing ring is provided on the inner wall of the flow channel, and the ball valve abuts against the sealing ring to seal the flow channel.

[0014] As a further improvement to the fire extinguishing temperature-sensing nozzle for battery packs of this application, the nozzle has a support base at the bottom, the support base has a connection hole and an adjusting screw, the adjusting screw is fitted into the connection hole, and one end of the adjusting screw abuts against the end of the temperature-sensing trigger tube away from the ball valve.

[0015] As a further improvement to the fire extinguishing temperature-sensing nozzle for a battery pack of this application, an adjusting rod is provided at the end of the ball valve away from the flow channel, and the adjusting rod is in contact with the temperature-sensing trigger tube.

[0016] As a further improvement to the fire extinguishing temperature-sensing nozzle for a battery pack of this application, the setting direction of the temperature-sensing trigger tube is perpendicular to the extension direction of the adjusting rod, and the adjusting rod is connected to the temperature-sensing trigger tube through a support block.

[0017] As a further improvement to the fire extinguishing temperature-sensing nozzle for a battery pack of this application, the temperature-sensing trigger tube is cylindrical in shape.

[0018] As a further improvement to the fire extinguishing temperature-sensing nozzle for battery packs in this application, the temperature-sensing trigger tube has a hollow structure and is filled with a low-boiling-point organic solvent. When the ambient temperature reaches a preset value, the organic solvent expands due to heat, causing the temperature-sensing trigger tube to rupture.

[0019] As a further improvement to the fire extinguishing temperature-sensing nozzle for a battery pack of this application, the connecting part has an external thread structure.

[0020] As a further improvement to the fire extinguishing temperature-sensing nozzle for primary battery packs of this application, the connecting part is located at the connection between the body and the nozzle head, or the connecting part is located at the end of the body away from the nozzle head. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the overall structure in Embodiment 1 of this utility model;

[0022] Figure 2 This is one of the structural schematic diagrams in Embodiment 1 of this utility model;

[0023] Figure 3 This is a cross-sectional view of the overall structure in Embodiment 2 of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of embodiment 2 of the present invention;

[0025] In the picture:

[0026] 1-Body part;

[0027] 11-Pipeline;

[0028] 12-Connecting part;

[0029] 2-Spray head;

[0030] 21-Flow channel;

[0031] 22- Nozzle;

[0032] 23-Sealing assembly;

[0033] 211 - Sealing ring;

[0034] 231 - Temperature-sensing trigger tube;

[0035] 2311 - Support block;

[0036] 232-Ball valve;

[0037] 2321 - Adjusting rod;

[0038] 24-Support base;

[0039] 241 - Adjusting screw. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] It is known that existing battery pack fire extinguishing devices mainly rely on electrical sensors, which suffer from problems such as short lifespan, need for manual activation, and delayed emergency response. To address the technical shortcomings of electrical sensors, this application is motivated by the design of a temperature-sensing fire extinguishing nozzle based on physical principles. Specifically, this temperature-sensing fire extinguishing nozzle is triggered through physical principles, without relying on electrical circuits or electronic sensing equipment. When the internal temperature of the battery pack rises abnormally and reaches the preset value of the temperature-sensing trigger tube 231, the low-boiling-point organic solvent inside the temperature-sensing trigger tube 231 expands due to heat, causing the temperature-sensing trigger tube 231 to rupture. This process is rapid and reliable, unaffected by electronic component failure, ensuring the effective operation of the fire extinguishing device at critical moments.

[0042] The following implementation method is a specific implementation process of the technical solution of this application.

[0043] Implementation Method 1

[0044] like Figure 1-2 As shown, in order to solve the technical defects in the above-mentioned technical solutions, this application improves the existing fire extinguishing device for battery packs by designing a temperature-sensing fire extinguishing nozzle based on physical properties. Specifically, the temperature-sensing fire extinguishing nozzle for battery packs of this application includes a body 1 and a nozzle head 2. The body 1 is connected to the nozzle head 2 via a pipe 11 disposed within the body 1, which is connected to a delivery pipe for a storage tank containing fire extinguishing agent. The body 1 is provided with a connecting part 12, which is used to assemble the body 1 onto the battery pack casing.

[0045] The nozzle head 2 is provided with a flow channel 21 and a nozzle 22 connected to the flow channel 21. One end of the flow channel 21 is connected to the pipe 11, and the other end of the flow channel 21 is connected to the nozzle 22. A sealing component 23 is provided inside the nozzle 22. The sealing component 23 includes a temperature-sensing trigger tube 231. When the ambient temperature of the temperature-sensing trigger tube 231 reaches a preset value, the temperature-sensing trigger tube 231 bursts, the nozzle 22 is opened, and the extinguishing agent is sprayed out from the nozzle head 2 along the nozzle 22.

[0046] like Figure 1As shown, the working principle of the fire extinguishing temperature-sensing nozzle for the battery pack described in this application is as follows: when the temperature inside the battery pack rises abnormally due to various reasons (such as overcharging, short circuit, etc.), the temperature-sensing trigger tube 231 installed in the nozzle 2 nozzle head 2 will sense this temperature change. Since the temperature-sensing trigger tube 231 is filled with a low-boiling-point organic solvent, the solvent expands rapidly as the temperature rises. When the temperature reaches the preset burst value of the temperature-sensing trigger tube 231, the temperature-sensing trigger tube 231 cannot withstand the internal pressure and bursts. At this time, the nozzle 22, which was originally sealed by the temperature-sensing trigger tube 231 and the sealing assembly 23, is opened. Under pressure, the fire extinguishing agent in the storage tank flows rapidly into the nozzle 22 along the pipe 11 and flow channel 21 inside the main body 1, and finally sprays out from the nozzle head 2, performing timely and effective fire extinguishing operation on the ignition point inside the battery pack. The whole process is automatic and rapid, overcoming a series of problems caused by the reliance on electrical sensors in the prior art.

[0047] Furthermore, the nozzle design takes into account both convenience and safety in practical applications. The connecting part 12 adopts an external thread structure, which facilitates the secure assembly of the main body 1 onto the battery pack casing, improving the overall stability of the device. In addition, the sealing assembly 23 also includes a ball valve 232, one end of which seals with the flow channel 21, and the other end of which abuts against the temperature-sensing trigger tube 231. The cooperative design of the ball valve 232 with the flow channel 21 and the temperature-sensing trigger tube 231 ensures effective sealing of the nozzle 22 under normal conditions, preventing accidental leakage of the extinguishing agent. An annular sealing ring 211 is provided on the inner wall of the flow channel 21, and the ball valve 232 abuts against the sealing ring 211 to seal the flow channel 21, further improving the sealing effect.

[0048] Specifically, the connecting part 12 is an external thread structure and is located at the connection between the body part 1 and the nozzle 2.

[0049] Furthermore, the bottom of the nozzle head 2 is provided with a support base 24, which has a connection hole and an adjusting screw 241. The adjusting screw 241 is fitted into the connection hole, with one end of the adjusting screw 241 abutting against the end of the temperature-sensing trigger tube 231 away from the ball valve 232. By adjusting the screw 241, the initial position of the temperature-sensing trigger tube 231 can be finely adjusted, thereby more precisely controlling the burst pressure of the temperature-sensing trigger tube 231 to adapt to the working environment and safety requirements of different battery packs. When the temperature-sensing trigger tube 231 bursts, the adjusting screw 241 can also play a certain limiting role, preventing the nozzle head 2 from excessive displacement due to the reaction force when the extinguishing agent is sprayed, ensuring that the extinguishing agent can be accurately sprayed towards the ignition point. Under pressure, the adjusting screw 241 is forced to remove the nozzle position, allowing the extinguishing agent to be sprayed smoothly.

[0050] In summary, the fire extinguishing temperature-sensing nozzle for battery packs proposed in this application effectively solves the technical defects of existing fire extinguishing devices for battery packs through an innovative physical triggering mechanism and a refined structural design, providing an efficient and reliable solution for fire extinguishing of new energy batteries, new energy vehicles, computer rooms, and energy storage.

[0051] Implementation Method 2

[0052] like Figure 1-4 As shown, further considering the use of automatic temperature-sensing fire sprinklers in compact, built-in installation scenarios, this application makes improvements to the aforementioned automatic temperature-sensing fire sprinkler. Specifically, as... Figure 3 As shown, the adjusting rod 2321 is connected to the temperature-sensing trigger tube 231 via the support block 2311. The temperature-sensing trigger tube 231 is cylindrical, while the contact area between the support block 2311 and the temperature-sensing trigger tube 231 is arc-shaped, forming a stable contact connection. Therefore, the adjusting rod 2321 can act more stably on the temperature-sensing trigger tube 231, ensuring that the fire extinguishing action can be triggered promptly and accurately when the temperature-sensing trigger tube 231 reaches its burst temperature. At the same time, this design also makes the installation of the entire sprinkler head more flexible and stable in a compact space, without affecting its normal function due to space limitations.

[0053] Furthermore, the internal structure of the temperature-sensing trigger tube 231 is hollow and filled with a low-boiling-point organic solvent. When the ambient temperature reaches a preset value, the organic solvent expands due to heat, causing the temperature-sensing trigger tube 231 to rupture. In specific implementation, the low-boiling-point organic solution is a mixture of diethyl ether. The diethyl ether mixture has a suitable boiling point range and can respond rapidly at specific ambient temperatures. When the temperature rises to the preset burst temperature, the diethyl ether mixture rapidly vaporizes and expands, generating pressure sufficient to rupture the temperature-sensing trigger tube 231. This design not only improves the sensitivity of the temperature-sensing trigger tube 231 but also ensures the timeliness and accuracy of the fire extinguishing action. In addition, the diethyl ether mixture, as a filling material, has chemically stable properties and is not easily decomposed or deteriorated, which can maintain the performance stability of the temperature-sensing trigger tube 231 for a long time and extend the service life of the automatic temperature-sensing fire extinguishing nozzle.

[0054] Specifically, in this embodiment, the connecting part 12 is located at the end of the main body 1 away from the nozzle 2. Therefore, during installation, the connecting part 12 can be more easily connected to external pipes 11 or devices, avoiding connection difficulties caused by limited space.

[0055] In summary, the improved fire-extinguishing temperature-sensing nozzle for battery packs proposed in this application provides a more complete and reliable solution for fire extinguishing of new energy batteries, including those for new energy vehicles, computer rooms, and energy storage systems, through innovations such as optimized structural design, enhanced stability and flexibility, improved fire extinguishing efficiency, and reinforced connection parts.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fire extinguishing temperature-sensing nozzle for a battery pack, comprising a body (1) and a nozzle head (2), wherein the body (1) connects the nozzle head (2) to a delivery pipe for a storage tank containing a fire extinguishing agent via a pipe (11) disposed within the body (1), characterized in that, The main body (1) is provided with a connecting part (12), which is used to assemble the main body (1) onto the battery pack casing; The nozzle (2) is provided with a flow channel (21) and a nozzle (22) connected to the flow channel. One end of the flow channel (21) is connected to the pipe (11), and the other end of the flow channel (21) is connected to the nozzle (22). The nozzle (22) is provided with a sealing assembly (23), which includes a temperature-sensing trigger tube (231). When the ambient temperature of the temperature-sensing trigger tube (231) reaches a preset value, the temperature-sensing trigger tube (231) bursts, and the extinguishing agent is sprayed out from the nozzle head (2) along the nozzle (22).

2. The fire extinguishing temperature-sensing nozzle for a battery pack according to claim 1, characterized in that, The sealing assembly (23) also includes a ball valve (232), one end of which is sealed to the flow channel (21), and the other end of which abuts against the temperature-sensing trigger tube (231).

3. A fire extinguishing temperature-sensing nozzle for a battery pack according to claim 2, characterized in that, The inner wall of the flow channel (21) is provided with an annular sealing ring (211), and the ball valve (232) abuts against the sealing ring (211) to seal the flow channel (21).

4. A fire extinguishing temperature-sensing nozzle for a battery pack according to claim 2, characterized in that, The nozzle (2) is provided with a support base (24) at the bottom. The support base (24) is provided with an adjusting screw (241). One end of the adjusting screw (241) abuts against the end of the temperature-sensing trigger tube (231) away from the ball valve (232).

5. A fire extinguishing temperature-sensing nozzle for a battery pack according to claim 2, characterized in that, An adjusting rod (2321) is provided at one end of the ball valve (232) away from the flow channel (21), and the adjusting rod (2321) is in contact with the temperature-sensing trigger tube (231).

6. A fire extinguishing temperature-sensing nozzle for a battery pack according to claim 5, characterized in that, The setting direction of the temperature-sensing trigger tube (231) is perpendicular to the extension direction of the adjusting rod (2321), and the adjusting rod (2321) is connected to the temperature-sensing trigger tube (231) through the support block (2311).

7. A fire extinguishing temperature-sensing nozzle for a battery pack according to claim 6, characterized in that, The temperature-sensing trigger tube (231) is cylindrical in shape.

8. A fire extinguishing temperature-sensing nozzle for a battery pack according to claim 1, characterized in that, The interior of the temperature-sensing trigger tube (231) is hollow and filled with a low-boiling-point organic solvent. When the ambient temperature reaches a preset value, the organic solvent expands due to heat, causing the temperature-sensing trigger tube (231) to rupture.

9. A fire extinguishing temperature-sensing nozzle for a battery pack according to claim 1, characterized in that, The connecting part (12) has an external thread structure.

10. A fire extinguishing temperature-sensing nozzle for a battery pack according to claim 1, characterized in that, The connecting part (12) is provided at the connection between the body part (1) and the nozzle (2) or the connecting part (12) is provided at the end of the body part (1) away from the nozzle (2).

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