Fire extinguishing nozzle, battery fire extinguishing system and energy storage system

Abstract

The utility model discloses a fire extinguishing spray head, battery fire extinguishing system and energy storage system, the fire extinguishing spray head is installed at the fire extinguishing port of the fire extinguishing pipeline, it includes the hot melt switch, the hot melt switch has the first operation state and the second operation state along with the temperature change of the space to be fire-fighting, when the hot melt switch is in the first operation state, the battery fire extinguishing system is in the second operation state. The hot melting switch is closed to block the fire-fighting opening; and when the hot melting switch is in the second operation state, the hot melting switch is turned on, so that the fire-fighting medium in the fire-fighting pipeline is sprayed out to the to-be-fire-fighting space through the fire-fighting opening. The hot melting switch is used for sensing the temperature of the space to be subjected to fire fighting, the hot melting switch correspondingly adjusts the opening state of the hot melting switch according to the temperature of the space to be subjected to fire fighting, and therefore control over fire fighting operation starting and stopping of the battery fire fighting system is achieved, the operation precision of the battery fire fighting system is improved, and meanwhile the cost of the fire extinguishing nozzle is reduced. By reducing the manufacturing cost of the fire extinguishing nozzle in the battery fire extinguishing system, the manufacturing cost of the battery fire extinguishing system is correspondingly reduced.

Description

Technical Field

[0001] The utility model relates to the field of fire protection, and in particular to a fire extinguishing sprinkler, a battery fire protection system and an energy storage system, wherein the fire extinguishing sprinkler can be applied to the battery fire protection system and the energy storage system. Background Art

[0002] In recent years, with the development and construction of the battery energy storage industry, the accompanying battery fire hazards have received increasing attention. With the advancement and development of battery technology, the capacity of battery cells has continued to increase. As a result, the destructiveness of fires after thermal runaway of batteries has increased accordingly. Fire-fighting equipment for battery energy storage also needs to continue to develop and improve.

[0003] Due to the random nature of battery thermal runaway, rapid identification of battery thermal runaway and targeted firefighting in the fire zone have become key research priorities. Currently, energy storage firefighting systems primarily rely on fire sensors, such as smoke, temperature, and combustible gas sensors, to detect fires. The characteristic information collected by the sensors is converted into electrical signals via signal detection equipment and subsequently transmitted to a control host. Upon receiving the fire signal, the control host opens the solenoid valves in the firefighting pipes to release the fire extinguishing agent. However, due to the large number of batteries in a single battery compartment and the limited detection range of the sensors, the sensors rely on the operational stability of the signal detection equipment, circuit transmission devices, and control host during signal transmission. This results in a complex energy storage firefighting system structure. Furthermore, the lack of sensitivity in the fire sensors increases the risk of false fire alarms.

[0004] Therefore, how to reduce the cost of the energy storage fire protection system while ensuring its functionality and improving its accuracy is an urgent problem that needs to be solved. Utility Model Content

[0005] In view of this, the present application provides a fire extinguishing sprinkler, a battery fire fighting system and an energy storage system, wherein the fire extinguishing sprinkler can be applied to the battery fire fighting system and the energy storage system. The fire extinguishing sprinkler is provided with a thermal melt switch, which is used to sense the temperature of the space to be extinguished. According to the temperature of the space to be extinguished, the thermal melt switch adjusts its own opening state accordingly, thereby realizing the control of the opening and closing of the fire fighting operation of the battery fire fighting system. While improving the accuracy of the fire fighting operation, it also reduces the cost of the fire extinguishing sprinkler, thereby solving the above-mentioned technical problems.

[0006] A first aspect of an embodiment of the present application provides a fire extinguishing nozzle installed at a fire outlet of a fire-fighting pipe, which includes a thermal melt switch. The thermal melt switch has a first operating state and a second operating state as the temperature of the fire-fighting space changes. When the thermal melt switch is in the first operating state, the thermal melt switch is closed to block the fire outlet; when the thermal melt switch is in the second operating state, the thermal melt switch is opened to allow the fire-fighting medium in the fire-fighting pipe to be sprayed out through the fire outlet to the fire-fighting space.

[0007] In the present application, the temperature of the space to be extinguished is a necessary condition for controlling the opening of the hot melt switch. According to the different temperatures of the space to be extinguished, the hot melt switch will be adjusted to different operating states accordingly, thereby controlling the connectivity between the fire-fighting pipe and the space to be extinguished. In this way, the opening and closing of the hot melt switch is almost synchronized with the actual fire-fighting needs of the space to be extinguished, thereby improving the fire-fighting accuracy of the space to be extinguished; in addition, due to the low cost of the hot melt switch, the cost of the fire-fighting sprinkler is correspondingly reduced. In this way, by reducing the cost of the fire-fighting sprinkler in the battery fire-fighting system, the cost of the battery fire-fighting system is correspondingly reduced.

[0008] In some embodiments of the first aspect, the fire sprinkler also includes a mounting support, which is used to connect a fire-fighting pipe. The mounting support forms an mounting inner cavity, and the side wall of the mounting support is provided with a first connecting hole and a second connecting hole. The fire port, the first connecting hole, the mounting inner cavity and the second connecting hole are arranged along the spraying direction of the fire sprinkler. The mounting inner cavity is connected to the fire port through the first connecting hole, and the mounting inner cavity is connected to the fire-fighting space through the second connecting hole; the hot melt switch is installed in the mounting inner cavity to control the on-off state between the fire port and the second connecting hole.

[0009] In the present application, the mounting support not only provides an installation inner cavity that can accommodate the hot melt switch, but also can realize the connection effect of the hot melt switch installed in the fire protection pipe; moreover, due to the sequential arrangement of the fire outlet, the first connecting hole, the installation inner cavity and the second connecting hole, a channel for guiding the flow of the fire protection medium is formed to a certain extent, thereby improving the positioning fire protection effect of the fire extinguishing sprinkler to a certain extent.

[0010] In some embodiments of the first aspect, the hot melt switch also includes a blocking block, which is placed in the installation inner cavity. In the first operating state of the hot melt switch, the blocking block blocks the first connecting hole. In the second operating state of the hot melt switch, the blocking block is at least partially moved out of the first connecting hole so that the first connecting hole, the installation inner cavity and the second connecting hole are connected. In this way, by controlling the position of the blocking block in the installation inner cavity, the fire extinguishing sprinkler can be controlled to be in different operating states.

[0011] In some embodiments of the first aspect, the hot melt switch includes a blocking block and a hot melt block, the blocking block is placed in the installation inner cavity, in the first operating state of the hot melt switch, the blocking block blocks the first connecting hole, in the second operating state of the hot melt switch, the blocking block is at least partially moved out of the first connecting hole so that the first connecting hole, the installation inner cavity and the second connecting hole are connected; the hot melt block is placed in the installation inner cavity, in the first operating state of the hot melt switch, the hot melt block is solid to occupy part of the space of the installation inner cavity and form a limiting effect on at least one side of the blocking block; in the second operating state of the hot melt switch, the hot melt block melts to release the limitation on the blocking block so that the blocking block is at least partially moved out of the first connecting hole.

[0012] In this application, the blocking block can be made of a material with high hardness and rigidity. When the hot melt switch should be in a closed state, the blocking block can stably block the first connecting hole under the joint constraints of the inner cavity side wall and the hot melt block to ensure the separation of the fire outlet and the fire-fighting space. Therefore, the hot melt switch is correspondingly provided with a hot melt block and a blocking block, which can broaden the application scenarios of the hot melt switch and enable the hot melt switch to be applied to large-scale, high-voltage battery fire protection systems.

[0013] In some embodiments of the first aspect, the hot melt switch also includes an elastic member. In the first operating state of the hot melt switch, the hot melt block, the sealing block and the elastic member are arranged in the installation inner cavity along a direction intersecting with the spraying direction of the fire extinguishing nozzle. The hot melt block and the elastic member jointly limit the sealing block to block the first connecting hole, and the two ends of the elastic member respectively abut the side wall and the sealing block of the installation inner cavity to make the elastic member in a compressed state; as the hot melt block melts, the hot melt switch switches from the first operating state to the second operating state, and the sealing block is at least partially moved out of the first connecting hole by the thrust of the elastic member. After the fire-fighting medium in the fire-fighting pipe is ejected from the fire-fighting port, it is ejected to the fire-fighting space through the first connecting hole, the installation inner cavity, and the second connecting hole in sequence.

[0014] In the present application, the provision of the elastic member can further enhance the effect of the blocking block leaving the first connecting hole. At the same time, it can also enable the blocking block to extrude the hot melt block after phase change to ensure that the blocking block can at least partially leave the first connecting hole, thereby improving the sensitivity and working performance of the hot melt switch, and preventing the hot melt switch from failing to operate due to the retention of the blocking block, thereby causing abnormal operation of the fire sprinkler, and causing safety accidents in the battery fire protection system or even the energy storage system using the fire sprinkler.

[0015] In some embodiments of the first aspect, the elastic member is a spring, so as to reduce the cost of the fire sprinkler to a certain extent while ensuring the elastic function of the elastic member.

[0016] In some embodiments of the first aspect, the mounting support includes a first body and a second body, the first body extends along the spraying direction of the fire extinguishing nozzle, and the second body extends along a direction intersecting the spraying direction of the fire extinguishing nozzle; the first body forms a spray channel connecting the first connecting hole and the second connecting hole, and the second body forms an installation inner cavity, and the installation inner cavity connects the spray channel; wherein, when the mounting support is connected to the fire-fighting pipe and the hot melt switch is turned on, the fire-fighting medium moves along the fire-fighting pipe to the fire outlet, then enters the spray channel from the first connecting hole, and moves along the spraying direction of the fire-fighting nozzle to be sprayed from the second connecting hole to the space to be extinguished.

[0017] In the present application, the movement direction of the blocking block is constrained by the side wall of the inner cavity and the elastic member, thereby making it difficult for the blocking block to move in the spraying direction to enter the spray channel. Thus, the fire-fighting medium can pass through the fire outlet and the spray channel in sequence to the fire-fighting space without hindrance to complete the fire-fighting operation on the battery pack in the fire-fighting space.

[0018] In some embodiments of the first aspect, the second connecting hole includes a first hole portion and a second hole portion. In the first operating state of the hot melt switch, the opposite sides of the blocking block respectively block the first connecting hole and the first hole portion, and the hot melt block blocks the second hole portion; in the second operating state of the hot melt switch, the fire outlet is connected to the first hole portion via the first connecting hole, wherein the further division of the second connecting hole is conducive to improving the opening effect of the hot melt switch, thereby further improving the smoothness of the fire fighting medium passing through the sprinkler channel, that is, improving the fire fighting effect of the fire extinguishing sprinkler.

[0019] In some embodiments of the first aspect, the fire extinguishing nozzle also includes a cover body for covering the thermal melt switch, so as to perform a certain gathering effect on the fire fighting medium when the fire fighting medium is sprayed out, so that the fire fighting medium can be sprayed and flowed more concentratedly to the target position of the fire fighting space, thereby improving the efficiency and effect of fire fighting.

[0020] In some embodiments of the first aspect, interconnected mounting openings and cover openings are provided on opposite sides of the cover. When the fire sprinkler is connected to a fire pipe, the mounting opening is connected to the fire opening, and the cover opening faces the fire fighting space. The cover further concentrates heat from the battery pack corresponding to the fire sprinkler, allowing the thermal melt switch to more accurately sense the temperature of the fire fighting space, thereby enabling more precise activation of the thermal melt switch. Furthermore, when the thermal melt switch is activated, the fire fighting medium ejected from the fire sprinkler can be more accurately sprayed onto the battery pack corresponding to the fire sprinkler due to the limiting effect of the cover, thereby improving the effectiveness of the fire fighting medium and fire fighting efficiency.

[0021] In some embodiments of the first aspect, the cover is a trumpet cover, which improves the efficiency of using the fire-fighting medium. At the same time, since the fire-fighting medium is difficult to stay and hang on the inner surface of the cover, the loss of the fire-fighting medium is reduced, and the fire-fighting effect of the fire-fighting sprinkler is enhanced to a certain extent.

[0022] In some embodiments of the first aspect, the hood opening is a square opening. In order to adapt to the shape of the battery pack, the hood opening is square so that the hood opening matches the actual shape of the battery pack, thereby improving the fire-fighting effect of the fire-extinguishing sprinkler to a certain extent.

[0023] A second aspect of an embodiment of the present application provides a battery fire protection system, which includes a fire protection pipe network, a fire tank, a pipe switch and the fire extinguishing nozzle of the first aspect of the embodiment of the present application, wherein the fire protection pipe network includes a plurality of interconnected fire protection pipes, and any fire protection pipe is provided with at least one fire outlet; the fire protection tank stores fire protection medium, and the fire protection pipe is connected to the fire protection pipe network to transfer the fire protection medium to each fire protection pipe; the pipe switch is connected to the fire protection pipe network to regulate the connection status between the fire protection tank and each fire protection pipe; the fire extinguishing nozzle is connected to the fire outlet in a one-to-one correspondence.

[0024] In some embodiments of the second aspect, the fire-fighting pipe network further includes an input main pipe, one end of which is connected to a fire-fighting tank, and the other end is connected to a plurality of fire-fighting pipes; a pipeline switch is provided on the input main pipe to control the connection status between the fire-fighting pipe and the fire-fighting pipe and each fire-fighting pipe, so that the input main pipe can be connected to a plurality of fire-fighting pipes, and the input main pipe can divert the fire-fighting medium flowing into its pipe to the pipelines of each fire-fighting pipe.

[0025] In some embodiments of the second aspect, the pipeline switch is a solenoid valve to facilitate automated control of the energy storage system.

[0026] A third aspect of an embodiment of the present application provides an energy storage system, comprising a plurality of battery packs and a battery fire protection system as in the second aspect of the embodiment of the present application, wherein one fire extinguishing nozzle corresponds to at least one battery pack.

[0027] For the main beneficial effects of the second and third aspects, please refer to the beneficial effects of the first aspect and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 This is a simplified structural diagram of the energy storage system;

[0030] Figure 2 for Figure 1 Illustration of the local structure of the energy storage system;

[0031] Figure 3 for Figure 2 The corresponding diagram of the fire sprinkler and the battery pack;

[0032] Figure 4 for Figure 1 Schematic diagram of the partial structure of the battery fire protection system;

[0033] Figure 5 for Figure 4 A cross-sectional view of a fire extinguishing sprinkler and its associated structure;

[0034] Figure 6 for Figure 4 A cross-sectional view of another type of fire sprinkler and its associated structure.

[0035] Description of reference numerals:

[0036] 1000-Energy storage system, 1-Battery fire protection system, 10-Fire extinguishing nozzle, 11-Thermal melt switch, 111-Sealing block, 112-Thermal melt block, 113-Elastic member, 12-Mounting support, 121-First main body, 1211-Spray channel, 122-Second main body, 1221-Mounting inner cavity, 123-First connecting hole, 124-Second connecting hole, 1241-First hole portion, 1242-Second hole portion, 13-Hood, 131-Mounting port, 132-Hood port, 20-Fire protection pipe network, 21-Fire protection pipe, 211-Fire protection port, 22-Input main pipe, 30-Fire protection tank, 40-Pipeline switch, 50-Battery pack, 51-Battery cell, 60-Space to be extinguished, A-Cavity direction, B-Spraying direction DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application are clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application.

[0038] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by a person having ordinary skills in the field to which this application belongs. The use of "one", "an" or "the" and other similar words in this application does not indicate a limit on quantity, but is only used to indicate the presence of at least one. "Include" or "comprise" and other similar words mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or similar words such as connected are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0039] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] Energy storage systems, comprised of multiple cabinet units, play a crucial role in the power system. These include energy time shifting, load tracking, and system frequency regulation on the generation side; alleviating line congestion, delaying equipment expansion, and improving power quality on the transmission and distribution side; and arbitrage opportunities for peak-valley electricity prices, providing backup power, and improving microgrid power supply reliability on the user side. Furthermore, energy storage systems are widely used for energy management in zero-carbon smart parks, ensuring uninterruptible power supply for critical facilities such as hospitals, providing stable power supply for the oil industry, and providing shared energy storage services integrated with the power grid to achieve peak and frequency regulation and improve overall stability. With technological advancements and cost reductions, the application scope of energy storage systems is expected to expand further.

[0041] Currently, energy storage systems may involve high-energy-density batteries during operation, which pose a risk of fire or explosion due to malfunction or improper operation. Therefore, fire safety in energy storage systems is crucial. Effective firefighting measures can prevent fires, control their spread, ensure personal safety, minimize property damage, and guarantee the continued stable operation of energy storage systems. Implementing effective firefighting strategies can significantly improve the safety of energy storage systems and mitigate potential safety risks.

[0042] Therefore, this application aims to improve the battery fire protection system in the energy storage system, while ensuring the function of the battery fire protection system, reduce the cost of the battery fire protection system, and improve the accuracy of the battery fire protection system, thereby improving the fire protection capability of the energy storage system and improving the safety of the energy storage system.

[0043] The following is a combination of the appended examples of the present application Figures 1-6, clearly and completely describe each technical solution in the embodiments of this application.

[0044] Please refer to Figures 1 to 3 The energy storage system 1000 includes several battery packs 50 and a battery fire protection system 1. One fire sprinkler 10 corresponds to at least one battery pack 50. When the fire sprinkler 10 is in operation, the fire-fighting medium is sprayed from the fire sprinkler 10 to the corresponding battery pack 50 to achieve targeted fire protection of the battery pack 50 in the fire protection space 60.

[0045] Please refer to Figure 4 In some embodiments, the battery fire protection system 1 includes a fire protection pipe network 20, a fire tank 30, a pipe switch 40 and a fire extinguishing sprinkler 10, wherein the fire protection pipe network 20 includes a plurality of interconnected fire protection pipes 21, and any fire protection pipe 21 is provided with at least one fire outlet 211; the fire protection tank 30 stores a fire protection medium, and the fire protection tank 30 is connected to the fire protection pipe network 20 to transfer the fire protection medium to each fire protection pipe 21; the pipe switch 40 is connected to the fire protection pipe network 20 to regulate the connection status of the fire protection tank 30 and each fire protection pipe 21; the fire extinguishing sprinkler 10 is connected to the fire outlet 211 one by one.

[0046] In the above embodiment, the space where the battery pack 50 is located is the space to be extinguished 60, and the fire outlet 211 of the fire pipe 21 in the fire pipe network 20 is connected to the fire extinguishing nozzle 10 to perform fire-fighting treatment on the battery pack 50 when the battery pack 50 is overheated, so as to maintain the ambient temperature of the space to be extinguished 60; wherein, the connection state between the fire pipe network 20 and the fire tank 30 is controlled by the pipe switch 40 provided thereon. When the pipe switch 40 is turned on, the fire-fighting medium in the fire tank 30 flows out of the fire tank 30 under the action of air pressure and moves along the fire pipe network 20 to reach each fire pipe 21; when some or all of the batteries in the battery pack 50 heat abnormally and the fire extinguishing nozzle 10 is turned on, the fire-fighting medium flows out from the fire outlet 211 to the space to be extinguished 60, so as to perform fire-fighting operations on the batteries corresponding to the fire extinguishing nozzle 10 in the space to be extinguished 60.

[0047] For further information, please refer to Figure 1 In some embodiments, the fire protection pipe network 20 further includes an input main pipe 22, one end of the input main pipe 22 is connected to the fire protection tank 30, and the other end is connected to multiple fire protection pipes 21; the pipeline switch 40 is provided on the input main pipe 22 to control the connection status between the fire protection tank 30 and the fire protection pipe 21 and each fire protection pipe 21. In this way, the input main pipe 22 can connect multiple fire protection pipes 21, and the input main pipe 22 can divert the fire protection medium flowing into its pipe to the pipeline of each fire protection pipe 21, so that the structure of the fire protection pipe network 20 is clearer and neater, and the fire protection pipes 21 will not interfere with or affect each other due to layout problems.

[0048] Please refer again Figure 1 In some embodiments, the pipeline switch 40 is a solenoid valve, which controls the opening and closing of the valve through the current of the electromagnetic coil. In this way, when the energy storage system 1000 needs to be automatically controlled, the solenoid valve can be connected to the automatic control system to realize the automatic control of the energy storage system 1000.

[0049] Please refer to Figure 1 、 Figure 5 and Figure 6 In some embodiments, the fire extinguishing nozzle 10 installed at the fire outlet 211 of the fire-fighting pipe 21 includes a thermal melt switch 11. The thermal melt switch 11 has a first operating state and a second operating state as the temperature of the fire-fighting space 60 changes. When the thermal melt switch 11 is in the first operating state, the thermal melt switch 11 is closed to block the fire outlet 211; when the thermal melt switch 11 is in the second operating state, the thermal melt switch 11 is opened to allow the fire-fighting medium in the fire-fighting pipe 21 to be sprayed out to the fire-fighting space 60 through the fire outlet 211.

[0050] It should be noted that the temperature of the fire-fighting space 60 is the condition for triggering the operation of the hot melt switch 11. When the temperature of the fire-fighting space 60 is abnormally high, the hot melt switch 11 receives the high temperature, and at least part of its interior undergoes a physical phase change due to the high temperature, so that the fire outlet 211 is connected to the fire-fighting space 60, and the fire-fighting medium flows out from the fire outlet 211 to carry out fire-fighting operations on the fire-fighting space 60.

[0051] In the embodiments of this part, the temperature of the fire-fighting space 60 is a necessary condition for controlling the opening of the hot melt switch 11. According to the different temperatures of the fire-fighting space 60, the hot melt switch 11 will be adjusted to different operating states accordingly, thereby controlling the connectivity between the fire-fighting pipe 21 and the fire-fighting space 60. In this way, the opening and closing of the hot melt switch 11 are almost synchronized with the actual fire-fighting needs of the fire-fighting space 60, thereby improving the fire-fighting accuracy of the fire-fighting space 60; in addition, because the cost of the hot melt switch 11 is relatively low, the cost of the fire-fighting sprinkler 10 is correspondingly reduced. In this way, by reducing the cost of the fire-fighting sprinkler 10 in the battery fire-fighting system 1, the cost of the battery fire-fighting system 1 is correspondingly reduced.

[0052] Please continue to refer to Figure 1 、 Figure 5 and Figure 6In some embodiments, the fire sprinkler 10 further includes a mounting support 12, which is used to connect the fire pipe 21. The mounting support 12 is formed with a mounting inner cavity 1221, and the side wall of the mounting support 12 is provided with a first connecting hole 123 and a second connecting hole 124. The fire outlet 211, the first connecting hole 123, the mounting inner cavity 1221 and the second connecting hole 124 are arranged along the spraying direction B of the fire sprinkler 10. The mounting inner cavity 1221 is connected to the fire outlet 211 through the first connecting hole 123, and the mounting inner cavity 1221 is connected to the fire space 60 through the second connecting hole 124; the hot melt switch 11 is installed in the mounting inner cavity 1221 to control the on-off state between the fire outlet 211 and the second connecting hole 124. Specifically, the mounting bracket 12 provides an installation inner cavity 1221 that can accommodate the hot melt switch 11, and can also achieve the connection effect of the hot melt switch 11 being installed on the fire pipe 21. Moreover, due to the sequential arrangement of the fire port 211, the first connecting hole 123, the installation inner cavity 1221 and the second connecting hole 124, a channel for guiding the flow of the fire medium is formed to a certain extent, so that the fire medium can be ejected along the direction of the channel (i.e., the ejection direction B shown in the figure) to reach the target position of the fire-fighting space 60, thereby improving the positioning fire-fighting effect of the fire-fighting sprinkler 10 to a certain extent.

[0053] In some embodiments, the hot melt switch 11 also includes a blocking block 111, which is placed in the installation cavity 1221. In the first operating state of the hot melt switch 11, the blocking block 111 blocks the first connecting hole 123. In the second operating state of the hot melt switch 11, the blocking block 111 is at least partially moved out of the first connecting hole 123 so that the first connecting hole 123, the installation cavity 1221 and the second connecting hole 124 are connected. In this way, by controlling the position of the blocking block 111 in the installation cavity 1221, the fire sprinkler 10 can be controlled to be in different operating states.

[0054] Further, in some embodiments, the hot melt switch 11 includes a blocking block 111 and a hot melt block 112, the blocking block 111 is placed in the installation cavity 1221, in the first operating state of the hot melt switch 11, the blocking block 111 blocks the first connecting hole 123, in the second operating state of the hot melt switch 11, the blocking block 111 is at least partially moved out of the first connecting hole 123 so that the first connecting hole 123, the installation cavity 1221 and the second connecting hole 124 are connected; the hot melt block 112 is placed in the installation cavity 1221, in the first operating state of the hot melt switch 11, the hot melt block 112 is solid to occupy part of the space of the installation cavity 1221 and form a limiting effect on at least one side of the blocking block 111; in the second operating state of the hot melt switch 111, the hot melt block 112 melts to release the limitation on the blocking block 111 so that the blocking block 111 is at least partially moved out of the first connecting hole 123.

[0055] Specifically, the hot melt switch 11 is provided with a hot melt block 112 made of a phase change material. When the temperature of the fire-fighting space 60 is too high, the hot melt block 112 is heated and melted, and its state is switched from a solid phase to a liquid phase. The liquid hot melt block 112 no longer has the restraining force it had in the solid state, and the limiting effect of the hot melt block 112 on the blocking block 111 disappears. The blocking block 111 can move under the action of external force to leave the first connecting hole 123, so that the fire outlet 211 can be connected to the fire-fighting space. 60, the fire-fighting medium moves into the fire-fighting space 60 through the fire-fighting port 211, the first connecting hole 123, the installation inner cavity 1221, and the second connecting hole 124 in sequence to perform fire-fighting operations on the battery pack 50 in the fire-fighting space 60; when the hot melt switch 11 is not turned on, the blocking block 111 is used to block the first connecting hole 123, and the hot melt block 112 and the installation production together form a restraining effect on the blocking block 111, so that the blocking block 111 can stably block the first connecting hole 123.

[0056] Among them, because the hot melt block 112 can undergo phase change, for economic cost considerations, the hardness and rigidity of the hot melt block 112 made of a more common phase change material are relatively small. In the battery fire protection system 1, if the fire protection pipe network 20 is relatively large, the working air pressure filled in the fire protection tank 30 used therein will increase accordingly, so that the fire protection medium in the fire protection tank 30 can flow to each inner pipe area of ​​the fire protection pipe network 20. If only the hot melt block 112 is used to seal the first connecting hole 123, when the pipeline switch 40 is opened, the hot melt block 112 may be broken by the action of the high-pressure fire protection medium, or be forced to detach from the first connecting hole 123, causing the hot melt switch 11 to fail, thereby affecting the normal operation of the hot melt switch 11.

[0057] The blocking block 111 can be made of a material with high hardness and rigidity, and its physical structure is more stable than that of the hot melt block 112. When the hot melt switch 11 should be in the closed state, the blocking block 111 can stably block the first connecting hole 123 under the joint constraints of the side wall of the installation cavity 1221 and the hot melt block 112 to ensure the separation of the fire outlet 211 and the fire-fighting space 60. Therefore, the hot melt switch 11 is correspondingly provided with the hot melt block 112 and the blocking block 111, which can broaden the application scenarios of the hot melt switch 11 and enable the hot melt switch 11 to be applied to large-scale, high-voltage battery fire protection systems 1.

[0058] Please continue to refer to Figure 1 、 Figure 5 and Figure 6In some embodiments, the hot melt switch 11 further includes an elastic member 113. In the first operating state of the hot melt switch 11, the hot melt block 112, the blocking block 111, and the elastic member 113 are arranged in the installation cavity 1221 along a direction intersecting the spraying direction B of the fire extinguishing sprinkler 10. The hot melt block 112 and the elastic member 113 jointly limit the blocking block 111 to block the first connecting hole 123. The two ends of the elastic member 113 respectively abut against the side wall of the installation cavity 1221 and the blocking block 111, so that the elastic member 113 is in a compressed state; as the hot melt block 112 melts, the hot melt switch 11 switches from the first operating state to the second operating state, and the blocking block 111 is at least partially moved out of the first connecting hole 123 by the thrust of the elastic member 113. After the fire-fighting medium in the fire-fighting pipe 21 is sprayed out from the fire-fighting port 211, it is sprayed out to the fire-fighting space 60 through the first connecting hole 123, the installation cavity 1221, and the second connecting hole 124 in sequence.

[0059] Specifically, when the hot melt block 112 melts due to heat, its volume becomes smaller, that is, in the installation cavity 1221, the hot melt block 112 releases a certain amount of space due to physical phase change. Because it is in liquid form and has fluidity, its restraining effect on the blocking block 111 is reduced, resulting in a reduction in the restraining effect on one side of the blocking block 111. On the other side of the blocking block 111, the restraining effect of the blocking block 111 on the elastic member 113 is also reduced. Under the action of its own elastic potential energy, the elastic member 113 restores its deformation and pushes the blocking block 111 at the same time, so that the blocking block 111 at least partially leaves the first connecting hole 123, thereby enabling the fire outlet 211 to be connected to the fire-fighting space 60 to complete the fire-fighting operation on the batteries in the fire-fighting space 60.

[0060] Among them, the setting of the elastic member 113 can further enhance the effect of the blocking block 111 leaving the first connecting hole 123. At the same time, it can also enable the blocking block 111 to squeeze the hot melt block 112 after phase change to ensure that the blocking block 111 can at least partially leave the first connecting hole 123, thereby improving the sensitivity and working performance of the hot melt switch 11, and preventing the hot melt switch 11 from not operating due to the retention of the blocking block 111, thereby preventing the fire sprinkler 10 from operating abnormally, causing the fire sprinkler 10 to work abnormally, resulting in the following Figure 4 The battery fire fighting system 1 of the fire extinguishing nozzle 10 shown in FIG. Figure 1 The safety accident of the energy storage system 1000 using the battery fire protection system 1 is shown.

[0061] Please continue to refer to Figure 1 、 Figure 5 and Figure 6In some embodiments, the mounting bracket 12 includes a first body 121 and a second body 122, the first body 121 extends along the spraying direction B of the fire extinguishing sprinkler 10, and the second body 122 extends along a direction intersecting the spraying direction B of the fire extinguishing sprinkler 10 (i.e., the cavity direction A); the first body 121 is formed with a spray channel 1211 connecting the first connecting hole 123 and the second connecting hole 124, and the second body 122 is formed with an installation inner cavity 1221, and the installation inner cavity 1221 is connected to the spray channel 1211; wherein, when the mounting bracket 12 is connected to the fire pipe 21 and the hot melt switch 11 is turned on, the fire fighting medium moves along the fire fighting pipe 21 to the fire outlet 211, and then enters the spray channel 1211 from the first connecting hole 123, and moves along the spraying direction B of the fire extinguishing sprinkler 10 to be sprayed from the second connecting hole 124 to the fire fighting space 60.

[0062] Specifically, when the mounting bracket 12 is mounted on the fire outlet 211 of the fire pipe 21, the cavity direction A of the mounting inner cavity 1221 intersects with the channel direction of the spray channel 1211. In this way, the arrangement direction (i.e., cavity direction A) of the hot melt block 112, the blocking block 111, and the elastic member 113 intersects with the ejection direction B of the fire medium, and the elastic member 113 is constrained by the blocking block 111 along the cavity direction A of the mounting inner cavity 1221. When the hot melt switch 11 is in operation, the elastic member 113 pushes the blocking block 111 along the cavity direction A of the mounting inner cavity 1221, so that the blocking block 111 moves along the cavity direction A of the mounting inner cavity 1221. The cavity direction A of 21 at least partially leaves the first connecting hole 123, so that the fire outlet 211 is connected to the fire-fighting space 60, so that the fire extinguishing sprinkler 10 performs the fire-fighting operation on the battery pack 50 in the fire-fighting space 60. As mentioned above, the moving direction of the blocking block 111 is constrained by the side wall of the mounting cavity 1221 and the elastic member 113. Thus, it is difficult for the blocking block 111 to move along the ejection direction B to enter the spray channel 1211. Thus, the fire-fighting medium can pass through the fire outlet 211 and the spray channel 1211 to the fire-fighting space 60 unimpeded in turn to complete the fire-fighting operation on the battery pack 50 in the fire-fighting space 60.

[0063] Furthermore, in some embodiments, the elastic member 113 is a spring, so as to reduce the cost of the fire sprinkler 10 to a certain extent while ensuring the elastic function of the elastic member 113; in addition, when the spring portion extends to the spray channel 1211, since the spring itself has a certain gap, it will not significantly hinder the outflow of the fire-fighting medium along the spray channel 1211.

[0064] In some other embodiments, the elastic member 113 may also be a rubber member, a disc spring, a torsion spring, etc.

[0065] Please continue to refer to Figure 1 、 Figure 5 and Figure 6In some embodiments, the second connecting hole 124 includes a first hole portion 1241 and a second hole portion 1242. In the first operating state of the hot melt switch 11, the opposite sides of the blocking block 111 respectively block the first connecting hole 123 and the first hole portion 1241, and the hot melt block 112 blocks the second hole portion 1242; in the second operating state of the hot melt switch 11, the fire outlet 211 is connected to the first hole portion 1241 via the first connecting hole 123.

[0066] When the hot melt switch 11 is turned on, the hot melt block 112 becomes a flowable liquid after the phase change due to heat, so the melted hot melt block 112 can flow out from the second connecting hole 124 to further release the available space of the installation cavity 1221, thereby increasing the moving distance of the blocking block 111 and improving the release effect of the blocking block 111 on the first connecting hole 123. In the above embodiment, the second connecting hole 124 is further divided into a first hole portion 1241 and a second hole portion 1242, wherein the second hole portion 1242 corresponds to the hot melt block 112 to ensure that the hot melt block 112 can flow out from the second hole portion 1242 after melting, and will not be unable to discharge the installation cavity 1221 due to the position limit of the blocking block 111, the elastic member 113, etc., and the first hole portion 1241 is used to ensure that when the hot melt switch 11 is turned on, the fire outlet 211 can be connected to the fire-fighting space 60, thereby ensuring the fire-fighting operation of the fire sprinkler 10.

[0067] In summary, the further division of the second connecting hole 124 is conducive to improving the opening effect of the hot melt switch 11, thereby further improving the smoothness of the fire-fighting medium passing through the spray channel 1211, that is, improving the fire-fighting effect of the fire-fighting sprinkler 10.

[0068] Furthermore, in some embodiments, the second hole portion 1242 may be provided as follows Figure 5 the location shown, or Figure 6 The position shown in Figure 5 、 Figure 6 In some embodiments corresponding to each other, such a configuration ensures that the side wall of the inner cavity 1221 supports and constrains the hot melt block 112 when it is solid, and also ensures that the hot melt block 112 can flow out of the second hole 1242 to the fire-fighting space 60 after melting. However, in particular, Figure 5 The flow rate of the melted hot melt block 112 in the second hole 1242 depends on the thrust generated by the elastic member 113 recovering its deformation and pushing the blocking block 111 along the cavity direction A. Therefore, although its flow rate is relatively slow, due to the restriction of the side wall of the inner cavity 1221, it will not fall out of the second hole 1242 due to the reduction in volume after melting, making the hot melt switch 11 more adjustable. Figure 6Since the opening direction of the second hole portion 1242 is the same as the gravity direction of the hot melt block 112, the melted hot melt block 112 flows along the ejection direction B, and the flow rate is improved to a certain extent, which is beneficial to improving the response speed of the hot melt switch 11.

[0069] For reference Figure 1 、 Figure 5 and Figure 6 In some embodiments, the fire extinguishing sprinkler 10 further includes a cover body 13 for covering the hot melt switch 11, so as to perform a certain gathering effect on the fire fighting medium when the fire fighting medium is sprayed out, so that the fire fighting medium can be sprayed and flowed to the target position of the fire fighting space 60 more concentratedly, thereby improving the efficiency and effect of fire fighting; in addition, when the target position in the fire fighting space 60 is on fire, the cover body 13 can also gather the temperature and smoke of the target position to a certain extent, so that the hot melt switch 11 can sense the condition of the target position more sensitively, and thus respond to the condition more quickly, that is, after the hot melt switch 11 senses the high temperature more quickly, the hot melt switch 11 quickly switches from the first operating state to the second operating state to perform fire spraying on the target position.

[0070] Furthermore, in some embodiments, an installation port 131 and a cover port 132 that are interconnected are respectively provided on opposite sides of the cover body 13; when the fire extinguishing nozzle 10 is connected to the fire pipe 21, the installation port 131 is connected to the fire port 211, and the cover port 132 is placed toward the fire fighting space, and the cover body 13 can further gather the heat of the battery pack 50 corresponding to the fire extinguishing nozzle 10, so that the temperature of the fire fighting space 60 sensed by the hot melt switch 11 is more accurate, so that the hot melt switch 11 can be opened more accurately; in addition, when the hot melt switch 11 is turned on, the fire fighting medium sprayed by the fire extinguishing nozzle 10 can be more accurately sprayed onto the battery pack 50 corresponding to the fire extinguishing nozzle 10 under the limiting action of the cover body 13, thereby improving the operating effect of the fire fighting medium and the fire fighting efficiency.

[0071] Please refer to Figures 1 to 6 In some embodiments, the cover body 13 is a trumpet cover. In this way, when the fire-fighting medium is ejected from the fire-fighting port 211, the cover body 13 forms a certain guiding effect on the ejection path of the fire-fighting medium. Moreover, because the cover body 13 is trumpet-shaped, it itself has no dead angle, and the fire-fighting medium will not be retained there due to being ejected to the dead angle. In this way, the utilization efficiency of the fire-fighting medium is improved. At the same time, because the fire-fighting medium is difficult to be retained or hung on the wall on the inner surface of the cover body 13, the loss of the fire-fighting medium is reduced, thereby enhancing the fire-fighting effect of the fire-fighting sprinkler 10 to a certain extent.

[0072] Please refer to Figure 3In some embodiments, the cover opening 132 is a square opening. Since the battery pack 50 is formed by a plurality of battery cells 51 arranged in a regular pattern, its overall shape is restricted by the shape of the battery cells 51, so the battery pack 50 is rectangular. Therefore, in order to adapt to the shape of the battery pack 50, the cover opening 132 is square, so that the cover opening 132 matches the actual shape of the battery pack 50, thereby improving the fire-fighting effect of the fire sprinkler 10 to a certain extent.

[0073] In some embodiments, the hot melt block 112 is composed of a mixture of polyurethane, toluene, and chloroform, with a weight percentage of 30:30:40. In other embodiments, the hot melt block 112 is composed of ethylene-vinyl acetate polymer, low molecular weight polyethylene, thermoplastic phenolic resin, and dibutyl phthalate, with a weight percentage of 55:5:25:20, thereby increasing the effect speed of the hot melt block 112.

[0074] In addition, when the battery pack 50 is operating, the battery pack 50 corresponding to the fire extinguishing nozzle 10 has already been used for firefighting operations and the battery pack 50 has been scrapped. Therefore, the hot melt block 112 does not need to be recycled after flowing out of the installation cavity 1221, and can be directly scrapped with the scrapped battery pack 50; and in some embodiments, the hot melt block 112 is made of organic material, which can be gasified and volatilized in a high-temperature environment without leaving any traces, and has no impact on the subsequent operation of the battery pack 50.

[0075] It should be noted that for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

[0076] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0077] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A fire extinguishing nozzle installed at the fire outlet of a fire pipe, characterized in that: include: The hot melt switch has a first operating state and a second operating state as the temperature of the fire-fighting space changes. When the hot melt switch is in the first operating state, the hot melt switch is closed to block the fire outlet; when the hot melt switch is in the second operating state, the hot melt switch is opened to allow the fire-fighting medium in the fire-fighting pipe to be sprayed into the fire-fighting space through the fire outlet.

2. The fire extinguishing nozzle according to claim 1, characterized in that: The fire extinguishing nozzle also includes: A mounting bracket is used to connect the fire-fighting pipe, the mounting bracket is formed with a mounting inner cavity, and a side wall of the mounting bracket is provided with a first communicating hole and a second communicating hole, the fire port, the first communicating hole, the mounting inner cavity and the second communicating hole are arranged along the spraying direction of the fire-extinguishing nozzle, the mounting inner cavity is connected to the fire port through the first communicating hole, and the mounting inner cavity is connected to the fire-fighting space through the second communicating hole; The hot melt switch is installed in the installation inner cavity to control the on-off state between the fire outlet and the second communicating hole.

3. The fire extinguishing nozzle according to claim 2, characterized in that: The thermal switch also includes: A blocking block is placed in the installation inner cavity. In the first operating state of the hot melt switch, the blocking block blocks the first connecting hole. In the second operating state of the hot melt switch, the blocking block is at least partially moved out of the first connecting hole so that the first connecting hole, the installation inner cavity and the second connecting hole are connected.

4. The fire extinguishing nozzle according to claim 3, characterized in that: The thermal switch also includes: A hot melt block is placed in the installation inner cavity. In the first operating state of the hot melt switch, the hot melt block is in a solid state to occupy part of the space of the installation inner cavity and form a limiting effect on at least one side of the blocking block; in the second operating state of the hot melt switch, the hot melt block melts to release the limit on the blocking block so that the blocking block is at least partially moved out of the first connecting hole.

5. The fire extinguishing nozzle according to claim 4, characterized in that: The hot melt switch further includes an elastic member. In the first operating state of the hot melt switch, the hot melt block, the blocking block, and the elastic member are arranged in the installation cavity along a direction intersecting the spraying direction of the fire extinguishing nozzle. The hot melt block and the elastic member jointly limit the blocking block to block the first communicating hole. The two ends of the elastic member respectively abut against the side wall of the installation cavity and the blocking block, so that the elastic member is in a compressed state. As the hot melt block melts, the hot melt switch switches from the first operating state to the second operating state, and the blocking block is at least partially moved out of the first connecting hole due to the thrust of the elastic member. After the fire-fighting medium in the fire-fighting pipe is ejected from the fire-fighting port, it is ejected to the space to be extinguished through the first connecting hole, the installation inner cavity, and the second connecting hole in sequence.

6. The fire extinguishing nozzle according to claim 5, characterized in that: The elastic member is a spring.

7. The fire extinguishing nozzle according to any one of claims 2 to 6, characterized in that: The mounting bracket includes a first body and a second body, the first body extending along the spraying direction of the fire extinguishing nozzle, and the second body extending in a direction intersecting the spraying direction of the fire extinguishing nozzle; the first body forms a spray channel connecting the first communicating hole and the second communicating hole, and the second body forms the mounting inner cavity, which is connected to the spray channel; When the mounting bracket is connected to the fire-fighting pipe and the hot melt switch is turned on, the fire-fighting medium moves along the fire-fighting pipe to the fire outlet, then enters the spray channel through the first connecting hole, and moves along the spraying direction of the fire-fighting nozzle to be sprayed out through the second connecting hole to the space to be extinguished.

8. The fire extinguishing nozzle according to any one of claims 4 to 6, characterized in that: The second connecting hole includes a first hole portion and a second hole portion. In the first operating state of the hot melt switch, the opposite sides of the blocking block respectively block the first connecting hole and the first hole portion, and the hot melt block blocks the second hole portion; in the second operating state of the hot melt switch, the fire outlet is connected to the first hole portion via the first connecting hole.

9. The fire extinguishing nozzle according to any one of claims 1 to 6, characterized in that: The fire extinguishing nozzle also includes a cover body for covering the thermal melt switch.

10. The fire extinguishing nozzle according to claim 9, characterized in that: A mounting opening and a cover opening that are communicated with each other are respectively provided on two opposite sides of the cover body; When the fire extinguishing nozzle is connected to the fire fighting pipe, the installation opening is connected to the fire fighting opening, and the cover opening is placed toward the fire fighting space.

11. The fire extinguishing nozzle according to claim 10, characterized in that: The cover body is a speaker cover; And / or, the cover opening is a square opening.

12. A battery fire fighting system, characterized in that: include: A fire protection pipe network, comprising a plurality of interconnected fire protection pipes, each of which has at least one fire outlet; A fire fighting tank storing a fire fighting medium, the fire fighting tank being connected to the fire fighting pipe network to transfer the fire fighting medium to each of the fire fighting pipes; A pipeline switch connected to the fire pipeline network to adjust the connection status between the fire tank and each of the fire pipelines; as well as The fire extinguishing nozzle according to any one of claims 1 to 11, wherein the fire extinguishing nozzle is connected to the fire outlet in a one-to-one correspondence.

13. The battery fire fighting system according to claim 12, wherein: The fire protection pipe network further includes an input main pipe, one end of which is connected to the fire protection tank, and the other end of which is connected to the plurality of fire protection pipes; The pipeline switch is arranged on the input main pipe to control the connection status between the fire-fighting pipe and the fire-fighting pipeline and each of the fire-fighting pipelines.

14. The battery fire fighting system according to claim 12 or 13, characterized in that: The pipeline switch is a solenoid valve.

15. An energy storage system, characterized in that: The invention comprises a plurality of battery packs and a battery fire fighting system as claimed in any one of claims 12 to 14, wherein one fire extinguishing sprinkler corresponds to at least one of the battery packs.

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