Multi-source supply type battery energy storage fire extinguishing system and method

Abstract

This invention belongs to the field of battery energy storage fire prevention technology, and discloses a multi-source supply battery energy storage fire extinguishing system and method. The fire extinguishing device includes several fire extinguishing modules corresponding to the battery box. Each fire extinguishing module includes a fire extinguishing box, a closed-loop temperature-sensing nozzle, a driving gas cylinder, and a thermal initiator. The fire extinguishing box is filled with extinguishing agent and connected to the closed-loop temperature-sensing nozzle. The driving gas cylinder is located inside the fire extinguishing box, and a cylinder valve is installed at the cylinder opening. The thermal initiator is installed at the cylinder valve. The interconnection device includes a closed delivery pipe and several interconnecting pipes connecting to the delivery pipe. The interconnecting pipes are correspondingly connected to the fire extinguishing box. The control device includes a controller and several detectors corresponding to the battery box. The detectors are connected to the controller and configured to monitor the opening and closing of the corresponding cylinder valve. The cylinder valve is electrically connected to the controller. The controller and the thermal initiator are used to open the cylinder valve. The system can quickly extinguish fires and continuously suppress reignition. By dispersing the extinguishing agent from multiple sources, it reduces the space occupied.

Description

Technical Field

[0001] This invention relates to the field of battery energy storage fire prevention technology, and in particular to a multi-source battery energy storage fire extinguishing system and fire extinguishing method. Background Technology

[0002] New energy sources such as wind power and photovoltaics are highly volatile, requiring large-scale energy storage systems. Battery energy storage systems, with their high energy density, short construction period, and good economic efficiency, have seen rapid development in recent years. However, if a battery sealed in the energy storage compartment malfunctions and opens its valve, it can release a large amount of flammable gas, which is highly susceptible to ignition by high temperatures or electrical sparks. Therefore, battery compartments are typically equipped with automatic fire suppression systems, with the smallest protection unit being the battery module, capable of meeting the requirements for extinguishing fires and continuously suppressing reignition.

[0003] Conventional automatic fire suppression systems for battery energy storage typically employ two types of solutions: one is a distributed fire suppression system, which involves placing small fire suppression devices such as aerosols and perfluorohexanone inside the battery pack. However, this solution suffers from issues such as insufficient extinguishing agent dosage and inability to extinguish a second fire after reignition. The other type uses pressurized perfluorohexanone, heptafluoropropane, liquid nitrogen, or fine water mist fire suppression devices, which centrally deliver the extinguishing agent into the battery box through pipelines. This approach suffers from problems such as large space requirements, high maintenance costs, and complex system structure. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-source battery-powered fire extinguishing system that occupies little space, can extinguish open flames in a timely manner, and continuously suppress reignition.

[0005] To achieve this objective, the present invention adopts the following technical solution: A multi-source battery-powered fire suppression system, installed in a battery compartment, the battery compartment containing several battery boxes, including: The fire extinguishing device includes several fire extinguishing modules that are correspondingly installed in the battery box. Each fire extinguishing module includes a fire extinguishing box, a closed-type temperature-sensing nozzle, a driving gas cylinder, and a thermal initiator. The fire extinguishing box is filled with extinguishing agent. The closed-type temperature-sensing nozzle is connected to the fire extinguishing box. The driving gas cylinder is located inside the fire extinguishing box. A cylinder valve is installed at the cylinder opening of the driving gas cylinder. The thermal initiator is installed on the cylinder opening valve and is configured to open the cylinder opening valve. An interconnection device, comprising a closed delivery pipe and a plurality of interconnection pipes connected to the delivery pipe, wherein each interconnection pipe is connected to the fire extinguishing box in a corresponding manner. The control device includes a controller and a plurality of detectors that are correspondingly installed in the battery box. The detectors are connected to the controller and are configured to monitor the opening and closing of the corresponding bottle valves. The bottle valves are electrically connected to the controller and the controller is configured to open the bottle valves.

[0006] Preferably, the bottle valve includes a housing, a sealing membrane, a first spring, an armature, a coil, and a first striking pin. The housing is installed at the mouth of the driving gas cylinder, and the sealing membrane seals the mouth of the driving gas cylinder. The first spring, the armature, the coil, and the first striking pin are all disposed inside the housing, and the armature is slidably connected to the inner wall of the housing. One end of the first spring is connected to the side of the housing away from the sealing membrane, and the other end of the first spring is connected to one side of the armature. The first striking pin is connected to the side of the armature away from the first spring and is inserted into the coil. The coil is disposed between the armature and the sealing membrane. The controller is configured to control the coil to be energized. When the coil is energized, it attracts the armature, and the armature moves toward the sealing membrane, causing the first striking pin to pierce the sealing membrane.

[0007] Preferably, the thermal initiator includes a housing, a compression spring, a connecting block, a second striker, and a thermal wire. The housing is mounted on the casing and communicates with the casing. The compression spring, the connecting block, and the second striker are all disposed inside the housing. The connecting block is slidably connected to the inner wall of the casing. One end of the compression spring is connected to the side of the housing opposite to the casing, and the other end of the compression spring is connected to one side of the connecting block. One end of the second striker is connected to the side of the connecting block opposite to the compression spring, and the other end extends into the casing. The thermal wire connects the connecting block to the inner wall of the battery box.

[0008] Preferably, the thermal wires are provided in two places, and the thermal initiator also includes a lever. The lever is disposed inside the housing and passes through the width direction of the connecting block. One end of each of the two thermal wires is connected to both ends of the lever, and the other end of each of the two thermal wires is connected to the inner wall of the battery box and the battery compartment, respectively.

[0009] Preferably, a first guide hole is provided on the side of the housing near the outer shell, and a second guide hole is coaxially provided on the side of the outer shell near the housing, with the second firing pin extending into the second guide hole and the first guide hole in sequence.

[0010] Preferably, the closed-type temperature-sensing nozzle has a porous structure, with the porous structure sealing the temperature-sensing element. The temperature-sensing element is made of shape memory metal or temperature-sensing glass. The initiation temperature of the temperature-sensing element is T1, and the initiation temperature of the thermal wire is T2, wherein T1 < T2.

[0011] Preferably, the fire extinguishing module further includes a siphon tube, one end of which extends into the fire extinguishing box and the other end is connected to the closed-type temperature-sensing nozzle.

[0012] Preferably, the fire extinguishing module also includes a three-way valve installed in the fire extinguishing box, wherein the three ports of the three-way valve are respectively connected to the siphon pipe, the closed-type temperature-sensing nozzle and the interconnecting pipe.

[0013] Preferably, the bottle neck valve is equipped with a pressure signal device configured to monitor the outlet pressure of the bottle neck valve, and the pressure signal device is connected to the detector.

[0014] Another objective of this invention is to provide a multi-source battery energy storage fire extinguishing method that can extinguish open flames in a timely manner and continuously suppress reignition.

[0015] To achieve this objective, the present invention adopts the following technical solution: A multi-source battery-powered fire extinguishing method, applied to the aforementioned multi-source battery-powered fire extinguishing system, includes the following steps: If any battery box experiences thermal runaway, the thermal initiator opens the corresponding bottle valve, and the extinguishing agent in the corresponding fire extinguishing box is sprayed out through the closed-type heat-sensing nozzle. The detector locates the thermally runaway battery compartment, and the controller activates the corresponding solenoid valve. The controller sequentially opens the remaining bottle valves and their corresponding solenoid valves.

[0016] The beneficial effects of this invention are: This invention provides a multi-source battery-powered fire suppression system, installed in a battery compartment. The battery compartment contains several battery boxes, including a fire suppression device, an interconnection device, and a control device. The fire suppression device includes several fire suppression modules, each corresponding to one of the battery boxes. Each fire suppression module includes a fire suppression box, a closed-loop heat-sensing nozzle, a driving gas cylinder, and a thermal initiator. The fire suppression box is filled with extinguishing agent. The closed-loop heat-sensing nozzle is connected to the fire suppression box. The driving gas cylinder is located inside the fire suppression box, and a valve is installed at the cylinder opening. The thermal initiator is installed at the valve and configured to open the valve. The interconnection device includes a closed delivery pipe and several interconnecting pipes connected to the delivery pipe, each corresponding to one of the fire suppression boxes. The control device includes a controller and several detectors, each corresponding to one of the battery boxes. The detectors are connected to the controller and configured to monitor the opening and closing of their corresponding valves. The valve is electrically connected to the controller, which is configured to open the valve. When the battery box experiences thermal runaway and ignites, it triggers the thermal initiator, which opens the valve, causing the high-pressure gas inside the cylinder to be ejected. This increases the pressure inside the battery box, and the extinguishing agent stored in the corresponding extinguishing box is released to the corresponding battery box through a closed-type heat-sensing nozzle, quickly extinguishing the fire. Simultaneously, the detector locates the thermally runaway battery box, and the controller sequentially opens the valves corresponding to the other normally operating battery boxes, continuously delivering the extinguishing agent stored in the normally operating battery boxes to the fire location through interconnecting pipes to suppress reignition. By setting up a multi-source decentralized supply of extinguishing agent, space is saved and the footprint is reduced. This invention also provides a multi-source supply battery energy storage fire extinguishing method, applied to the above-mentioned multi-source supply battery energy storage fire extinguishing system, which can extinguish open flames in a timely manner and continuously suppress reignition. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a multi-source battery energy storage fire extinguishing system provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the fire extinguishing module provided in Embodiment 1 of the present invention; Figure 3 This is a partial structural diagram of the fire extinguishing module provided in Embodiment 1 of the present invention. Figure 1 ; Figure 4 This is a partial structural diagram of the fire extinguishing module provided in Embodiment 1 of the present invention. Figure 2 ; Figure 5 This is a partial structural diagram of the fire extinguishing module provided in Embodiment 1 of the present invention. Figure 3 ; Figure 6 This is a partial structural diagram of the fire extinguishing module provided in Embodiment 1 of the present invention. Figure 4 ; Figure 7This is a schematic flowchart of a multi-source battery energy storage fire extinguishing method provided in Embodiment 2 of the present invention.

[0018] In the picture: 10. Battery box; 1. Fire extinguishing module; 11. Fire extinguishing box; 12. Closed-type temperature-sensing nozzle; 13. Drive gas cylinder; 14. Thermal initiator; 141. Housing; 1411. Second guide hole; 142. Compression spring; 143. Connecting block; 144. Second firing pin; 145. Thermosensitive wire; 146. Lever; 15. Bottle valve; 151. Housing; 1511. First guide hole; 152. Sealing membrane; 153. First spring; 154. Armature; 155. Coil; 156. First firing pin; 16. Siphon tube; 17. T-junction; 21. Delivery pipe; 22. Interconnecting pipe. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0020] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0023] Example 1 This embodiment provides a multi-source battery-powered fire extinguishing system that occupies little space, can extinguish open flames in a timely manner, and continuously suppress reignition.

[0024] Please see Figures 1 to 6 The multi-source battery energy storage fire extinguishing system provided in this embodiment is installed in the battery compartment, which is equipped with several battery boxes 10. This embodiment can extinguish any open flame caused by thermal runaway of any battery box 10 in the battery compartment in a timely manner and can continuously suppress reignition.

[0025] This embodiment provides a multi-source battery energy storage fire extinguishing system, including a control device, a fire extinguishing device, and an interconnection device. The fire extinguishing device can automatically activate, releasing extinguishing agent to any battery box 10 in the battery compartment that has experienced thermal runaway, promptly extinguishing open flames. The control device can locate the thermal runaway and, in conjunction with the interconnection device, continuously delivers extinguishing agent from multiple sources to the fire location to suppress reignition. By setting up a multi-source, decentralized supply of extinguishing agent, it saves more space and reduces the footprint compared to a centralized extinguishing agent supply system.

[0026] Optionally, the extinguishing agent is a high-boiling-point gaseous extinguishing agent that is liquid at room temperature, composed of one or more compounds such as fluoroketones, fluoroolefins, fluoroalkanes, and fluoroethers, and can be stored at atmospheric pressure.

[0027] Specifically, the control device includes a controller and several detectors. The detectors are connected to the controller, and each detector corresponds one-to-one with a number of battery boxes 10. For example, the detectors are installed in the corresponding battery boxes 10 to locate the battery box 10 that has experienced thermal runaway and to feed the location information back to the controller to ensure a rapid response from the controller.

[0028] Furthermore, the fire extinguishing device includes several fire extinguishing modules 1, each storing a fire extinguishing agent. Each fire extinguishing module 1 corresponds to one of several battery boxes 10. When a battery box 10 experiences thermal runaway, the fire extinguishing module 1 can automatically activate upon sensing temperature, releasing the fire extinguishing agent to its corresponding battery box 10 to extinguish the open flame promptly. Further, this embodiment also connects the fire extinguishing modules 1 to a controller. When any one or more battery boxes 10 in the battery compartment experience thermal runaway, the controller can sequentially activate the fire extinguishing modules 1 corresponding to the remaining normally operating battery boxes 10, continuously delivering their stored fire extinguishing agents to the location of the fire to suppress reignition.

[0029] In other alternative embodiments, the fire extinguishing module 1 is arranged inside the battery box 10, specifically on the front of the battery box 10, that is, the maintenance panel of the battery box 10.

[0030] Furthermore, please refer to Figure 1 The interconnection device includes a closed delivery pipe 21 and several interconnecting pipes 22. One end of each interconnecting pipe 22 is connected to the delivery pipe 21, and the other end of each interconnecting pipe 22 is connected to a fire extinguishing module 1, thereby interconnecting the several fire extinguishing modules 1 and enabling the continuous delivery of the extinguishing agent stored in the fire extinguishing module 1 to the fire location. Preferably, the delivery pipes 21 are arranged in a ring network, which can reduce pressure loss, achieve bidirectional delivery, and improve the reliability of extinguishing agent delivery. Furthermore, the connection between the delivery pipes 21 and the interconnecting pipes 22 adopts quick-connect or snap-fit ​​methods to facilitate interface connection.

[0031] Preferably, a solenoid valve is provided on the interconnect pipe 22, the solenoid valve controls the on and off of the interconnect pipe 22, and the solenoid valve is electrically connected to the controller.

[0032] More preferably, both the delivery pipe 21 and the interconnecting pipe 22 are made of stainless steel pipe, copper pipe or flexible hose with a diameter of 5mm.

[0033] Specifically, please refer to Figure 2 and Figure 3 The fire extinguishing module 1 includes a fire extinguishing box 11, a closed-loop heat-sensing nozzle 12, a driving gas cylinder 13, and a thermal initiator 14. The fire extinguishing box 11 is filled with extinguishing agent. The closed-loop heat-sensing nozzle 12 is connected to the fire extinguishing box 11, and the other end of the interconnecting pipe 22 is connected to the fire extinguishing box 11. The driving gas cylinder 13 is located inside the fire extinguishing box 11 and is filled with high-pressure inert gas. A cylinder valve 15 is installed at the cylinder opening of the driving gas cylinder 13, sealing the cylinder opening. The cylinder valve 15 is electrically connected to a controller, and the thermal initiator 14 is installed on the cylinder valve 15.

[0034] Preferably, the fire extinguishing box 11 has a length, height, and thickness of 148mm*80mm*25mm, is made of stainless steel, and is filled with 300g of fire extinguishing agent.

[0035] Optionally, the closed-loop heat-sensing nozzle 12 in this embodiment has a porous structure. The porous structure is sealed by a heat-sensing element made of shape memory metal or heat-sensing glass. The initiation temperature of the heat-sensing element is T1. When the ambient temperature exceeds T1, the heat-sensing element will deform or the glass will break, thereby opening the porous structure so that the extinguishing agent can be released through the closed-loop heat-sensing nozzle 12. For example, the porous structure is arranged on the side and top of the closed-loop heat-sensing nozzle 12, T1 is 90±5℃, and the pressure resistance at room temperature is greater than 3MPa.

[0036] With the above settings, when the battery box 10 experiences thermal runaway and catches fire, the temperature around the battery box 10 rises sharply. When the ambient temperature exceeds the operating temperature of the thermal initiator 14, the thermal initiator 14 is triggered. The thermal initiator 14 opens the bottle valve 15, driving the high-pressure inert gas inside the gas cylinder 13 to be ejected. The pressure inside the battery box 10 rises, and the extinguishing agent stored in the corresponding fire extinguishing box 11 can be released to the corresponding battery box 10 through the closed-type heat-sensing nozzle 12 to quickly extinguish the fire.

[0037] In addition, when thermal runaway occurs in any one or more battery boxes 10 in the battery compartment, the detector locates the thermally runaway battery box 10, the controller opens the solenoid valve on the interconnect pipe 22 corresponding to the thermally runaway battery box 10, and sequentially opens the bottle valve 15 and solenoid valve corresponding to the other normally operating battery boxes 10. Since the hole structure of the closed-type heat-sensing nozzle 12 can only be opened when the ambient temperature exceeds T1, the fire extinguishing agent stored in the normally operating battery box 10 can be continuously delivered to the fire location through the interconnect pipe 22 to suppress reignition.

[0038] Furthermore, the detector is configured to monitor the opening and closing of the corresponding bottle valve 15. Specifically, a pressure signaler is installed on the bottle valve 15, which monitors the outlet pressure of the bottle valve 15 and connects to the detector. When the battery box 10 experiences thermal runaway, the bottle valve 15 opens, driving a large amount of high-pressure inert gas inside the gas cylinder 13 to be ejected from the bottle valve 15. After detecting the pressure signal, the pressure signaler feeds it back to the detector, which locates the battery box 10 that has experienced thermal runaway and feeds the location information back to the controller to ensure that the controller can respond quickly. The controller then sequentially opens the bottle valves 15 corresponding to the other normally operating battery boxes 10, continuously delivering the extinguishing agent stored in the normally operating battery boxes 10 to the fire location through the interconnecting pipe 22 to suppress reignition.

[0039] Alternatively, please continue reading Figure 1 and Figure 2The fire extinguishing module 1 also includes a siphon tube 16 and a tee 17. An installation hole is made on the fire extinguishing box 11, and the siphon tube 16 is sealed and inserted into the installation hole so that one end of the siphon tube 16 extends into the fire extinguishing box 11. The three ports of the tee 17 are respectively connected to the siphon tube 16, the closed-type heat-sensing nozzle 12 and the interconnecting pipe 22, so that the siphon tube 16 can be connected to the closed-type heat-sensing nozzle 12 and the interconnecting pipe 22. The extinguishing agent in the fire extinguishing box 11 can be forced into the siphon tube 16 under high pressure and released or transported through the closed-type heat-sensing nozzle 12 or the interconnecting pipe 22.

[0040] In this embodiment, a quick-connect connector is sealed and installed in the mounting hole, and a siphon tube 16 is sealed and inserted into the quick-connect connector. The closed-type heat-sensing nozzle 12 is prefabricated and installed on the inner wall of the battery box 10. Specifically, it is installed on the maintenance panel of the battery box 10. The closed-type heat-sensing nozzle 12 is connected to the interface of the tee 17 through a pressure-resistant and high-temperature resistant hose, so as to facilitate the subsequent daily maintenance and replacement of the fire extinguishing module 1.

[0041] Specifically, please refer to Figure 4 and Figure 5 The bottle valve 15 includes a housing 151, a sealing membrane 152, a first spring 153, an armature 154, a coil 155, and a first striking pin 156. The housing 151 is sealed to the mouth of the driving gas cylinder 13 via screws or other connections. The sealing membrane 152 seals the mouth of the driving gas cylinder 13. The first spring 153, armature 154, coil 155, and first striking pin 156 are all disposed inside the housing 151. The armature 154 is slidably connected to the inner wall of the housing 151. One end of the first spring 153 is connected to the side of the housing 151 opposite to the sealing membrane 152, and the other end is connected to one side of the armature 154. The first striking pin 156 is connected to the side of the armature 154 opposite to the first spring 153. The first striking pin 156 is inserted into the coil 155, which is positioned between the armature 154 and the sealing membrane 152. The two connectors of the coil 155 are connected to a controller. With the above settings, the controller controls the coil 155 to be energized, the coil 155 attracts the armature 154, the armature 154 moves towards the sealing membrane 152, the armature 154 pulls the first spring 153, and drives the first striking pin 156 to move towards the sealing membrane 152, so that the first striking pin 156 pierces the sealing membrane 152 and opens the bottle valve 15, thereby realizing the controller's control to open the bottle valve 15.

[0042] Specifically, please refer to Figure 3 , Figure 4 and Figure 6The thermal initiator 14 includes a housing 141, a compression spring 142, a connecting block 143, a second striker 144, and a thermal wire 145. The housing 141 is mounted on and connected to the housing 151. The compression spring 142, connecting block 143, and second striker 144 are all disposed inside the housing 141. The connecting block 143 is slidably connected to the inner wall of the housing 141. One end of the compression spring 142 is connected to the side of the housing 141 opposite to the housing 151, and another end of the compression spring 142 is connected to one side of the connecting block 143. One end of the second striker 144 is connected to the side of the connecting block 143 opposite to the compression spring 142, specifically, to the side of the connecting block 143 opposite to the housing 151, and the other end extends into the housing 151. The thermal wire 145 connects the connecting block 143 to the inner wall of the battery box 10.

[0043] It should be noted that the thermal wire 145 is a common structure in the prior art. It is in a taut state at room temperature. When the ambient temperature exceeds the initiation temperature T2 of the thermal wire 145, the thermal wire 145 melts instantly.

[0044] With the above settings, when the battery box 10 experiences thermal runaway and fire, the internal temperature of the battery box 10 rises, and the ambient temperature exceeds the initiation temperature T2 of the thermal wire 145. The thermal wire 145 melts and, under the action of the compression spring 142, the connecting block 143 drives the second striking pin 144 to move towards the sealing film 152, so that the second striking pin 144 pierces the sealing film 152 and opens the bottle valve 15.

[0045] Preferably, T2 is set to 170±5℃, which is greater than T1. The closed-type temperature-sensing nozzle 12 activates earlier than the heat-sensitive wire 145, ensuring that the release channel of the extinguishing agent is unobstructed before the extinguishing agent is released.

[0046] For example, a first guide hole 1511 is provided on the side of housing 151 near outer shell 141, and a second guide hole 1411 is coaxially provided on the side of outer shell 141 near housing 151. The second firing pin 144 can extend into the second guide hole 1411 and the first guide hole 1511 in sequence. Preferably, the first firing pin 156 and the second firing pin 144 are spaced apart in the width direction of housing 151 to avoid interference between the first firing pin 156 and the second firing pin 144.

[0047] Furthermore, in this embodiment, two thermal wires 145 are provided, and a lever 146 is provided inside the outer casing 141. Specifically, the lever 146 is provided through the connecting block 143 along the width direction of the connecting block 143. One end of the two thermal wires 145 is connected to the two ends of the lever 146 respectively, and the other end of the two thermal wires 145 is connected to the inner wall of the battery box 10 and the battery compartment respectively. Under normal temperature conditions, the lever 146 remains in a balanced state.

[0048] With the above settings, the combustible gas generated after thermal runaway of the battery box 10 is released into the sealed battery box 10. When the lack of oxygen inside the battery box 10 prevents the ignition of an open flame, causing the internal temperature of the battery box 10 to fail to rise normally, the thermally sensitive wire 145 connected to the battery compartment at the end can be melted by an external open flame, thus improving reliability.

[0049] Preferably, since open flames are easily ignited near the pressure relief port of the battery box 10, the thermal wire 145, whose end is connected to the battery compartment, is arranged near the pressure relief port of the battery box 10.

[0050] Example 2 This embodiment provides a multi-source battery energy storage fire extinguishing method, which is applied to the above-mentioned multi-source battery energy storage fire extinguishing system. It can extinguish open flames in a timely manner and continuously suppress reignition.

[0051] Please see Figure 7 The multi-source battery energy storage fire extinguishing method provided in this embodiment includes the following steps: If any battery box 10 experiences thermal runaway, the thermal initiator 14 opens the corresponding bottle valve 15, and the extinguishing agent in the corresponding fire extinguishing box 11 is sprayed out through the closed temperature sensing nozzle 12. The detector locates the thermally runaway battery box 10, and the controller opens the corresponding solenoid valve. The controller sequentially opens the remaining bottle neck valves 15 and their corresponding solenoid valves.

[0052] Specifically: When the battery box 10 in the battery compartment experiences thermal runaway, the temperature around the battery box 10 rises sharply. When the ambient temperature exceeds the operating temperature of the thermal initiator 14, the thermal initiator 14 is triggered. The thermal initiator 14 opens the bottle valve 15, driving the high-pressure inert gas inside the gas cylinder 13 to be ejected. The pressure inside the battery box 10 increases, and the extinguishing agent stored in the corresponding fire extinguishing box 11 can be released to the corresponding battery box 10 through the closed-type heat-sensing nozzle 12 to quickly extinguish the fire.

[0053] Specifically: When the battery box 10 that has experienced thermal runaway opens, the valve 15 inside the cylinder opens, and a large amount of high-pressure inert gas inside the driving gas cylinder 13 is ejected from the valve 15. After the pressure signal is detected, the pressure signaler feeds back to the detector, which locates the battery box 10 that has experienced thermal runaway and feeds back the location information to the controller. The controller opens the solenoid valve corresponding to the fire extinguishing box 11 to ensure that the extinguishing agent from other sources can be smoothly introduced into the fire extinguishing module 1 inside the battery box 10 through the interconnecting pipe 22.

[0054] Specifically: The controller sequentially opens the remaining bottle valves 15 and their corresponding solenoid valves. Specifically, the bottle valve 15 and its corresponding solenoid valve open simultaneously, thereby continuously delivering the extinguishing agent stored in the normally operating battery box 10 to the fire location through the delivery pipe 21 and the interconnecting pipe 22.

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A multi-source battery-powered fire extinguishing system, installed in a battery compartment, the battery compartment being provided with a plurality of battery boxes (10), characterized in that, include: The fire extinguishing device includes several fire extinguishing modules (1) that are correspondingly arranged in the battery box (10). Each fire extinguishing module (1) includes a fire extinguishing box (11), a closed-type heat-sensing nozzle (12), a driving gas cylinder (13), and a heat initiator (14). The fire extinguishing box (11) is filled with fire extinguishing agent. The closed-type heat-sensing nozzle (12) is connected to the fire extinguishing box (11). The driving gas cylinder (13) is located inside the fire extinguishing box (11). A cylinder valve (15) is installed at the cylinder opening of the driving gas cylinder (13). The heat initiator (14) is installed on the cylinder valve (15) and is configured to open the cylinder valve (15). The interconnection device includes a closed delivery pipe (21) and a plurality of interconnection pipes (22) connected to the delivery pipe (21), and the interconnection pipes (22) are connected to the fire extinguishing box (11) one by one. The control device includes a controller and a plurality of detectors that are correspondingly disposed in the battery box (10). The detectors are connected to the controller and are configured to monitor the opening and closing of the corresponding bottle valve (15). The bottle valve (15) is electrically connected to the controller and the controller is configured to open the bottle valve (15).

2. The multi-source battery-powered fire extinguishing system according to claim 1, characterized in that, The bottle valve (15) includes a housing (151), a sealing membrane (152), a first spring (153), an armature (154), a coil (155), and a first striking pin (156). The housing (151) is installed at the mouth of the driving gas cylinder (13), and the sealing membrane (152) seals the mouth of the driving gas cylinder (13). The first spring (153), the armature (154), the coil (155), and the first striking pin (156) are all disposed inside the housing (151), and the armature (154) is slidably connected to the inner wall of the housing (151). One end of the first spring (153) is connected to the housing (151) away from the sealing membrane. On one side of the first spring (153), the other end of the first spring (154) is connected to one side of the armature (154). The first firing pin (156) is connected to the side of the armature (154) away from the first spring (153). The first firing pin (156) is inserted into the coil (155). The coil (155) is disposed between the armature (154) and the sealing membrane (152). The controller is configured to control the coil (155) to be energized. After the coil (155) is energized, it attracts the armature (154). The armature (154) moves toward the sealing membrane (152), causing the first firing pin (156) to pierce the sealing membrane (152).

3. The multi-source battery-powered fire extinguishing system according to claim 2, characterized in that, The thermal initiator (14) includes a housing (141), a compression spring (142), a connecting block (143), a second striking pin (144), and a thermal wire (145). The housing (141) is mounted on the housing (151) and communicates with the housing (151). The compression spring (142), the connecting block (143), and the second striking pin (144) are all disposed inside the housing (141), and the connecting block (143) is slidably connected to the housing (151). The inner wall of the housing (151) has one end of the compression spring (142) connected to the side of the housing (141) away from the housing (151), and the other end of the compression spring (142) connected to one side of the connecting block (143). One end of the second striker (144) is connected to the side of the connecting block (143) away from the compression spring (142), and the other end extends into the housing (151). The thermal wire (145) connects the connecting block (143) to the inner wall of the battery box (10).

4. A multi-source battery-powered fire extinguishing system according to claim 3, characterized in that, Two thermal wires (145) are provided. The thermal initiator (14) also includes a lever (146). The lever (146) is located inside the outer shell (141). The lever (146) passes through the width direction of the connecting block (143). One end of the two thermal wires (145) is connected to the two ends of the lever (146) respectively. The other end of the two thermal wires (145) is connected to the inner wall of the battery box (10) and the battery compartment respectively.

5. A multi-source battery-powered fire extinguishing system according to claim 3, characterized in that, The housing (151) has a first guide hole (1511) on the side near the outer shell (141), and the outer shell (141) has a second guide hole (1411) coaxially on the side near the housing (151). The second firing pin (144) extends into the second guide hole (1411) and the first guide hole (1511) in sequence.

6. A multi-source battery-powered fire extinguishing system according to claim 3, characterized in that, The closed-type temperature-sensing nozzle (12) has a porous structure, and the porous structure seals the temperature-sensing element. The temperature-sensing element is made of shape memory metal or temperature-sensing glass. The initiation temperature of the temperature-sensing element is T1, and the initiation temperature of the thermal wire (145) is T2, wherein T1 < T2.

7. A multi-source battery-powered fire extinguishing system according to claim 1, characterized in that, The fire extinguishing module (1) also includes a siphon tube (16), one end of which extends into the fire extinguishing box (11) and the other end is connected to the closed-type temperature-sensing nozzle (12).

8. A multi-source battery-powered fire extinguishing system according to claim 7, characterized in that, The fire extinguishing module (1) also includes a three-way valve (17) installed in the fire extinguishing box (11), and the three ports of the three-way valve (17) are respectively connected to the siphon pipe (16), the closed temperature sensing nozzle (12) and the interconnecting pipe (22).

9. A multi-source battery-powered fire extinguishing system according to claim 1, characterized in that, The bottle neck valve (15) is equipped with a pressure signal device configured to monitor the outlet pressure of the bottle neck valve (15), and the pressure signal device is connected to the detector.

10. A multi-source battery energy storage fire extinguishing method, applied to a multi-source battery energy storage fire extinguishing system as described in any one of claims 1-9, characterized in that, Includes the following steps: If any battery box (10) experiences thermal runaway, the thermal initiator (14) opens the corresponding bottle valve (15), and the extinguishing agent in the corresponding fire extinguishing box (11) is sprayed out through the closed-type heat-sensing nozzle (12); The detector locates the thermally runaway battery box (10), and the controller opens the corresponding solenoid valve; The controller sequentially opens the remaining bottle neck valves (15) and the corresponding solenoid valves.

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