Battery-powered fire suppression systems and battery systems

Abstract

This application relates to a battery fire extinguishing device and battery system. The battery fire extinguishing device includes a connecting pipe, a gas-liquid shared nozzle, a fire extinguishing gas supply mechanism, a fire extinguishing liquid supply mechanism, and a fire monitoring mechanism. The gas-liquid shared nozzle is connected to the connecting pipe; the fire extinguishing gas supply mechanism includes a first gas storage component and a first safety valve assembly, the first safety valve assembly being disposed on the first gas storage component and connected to the connecting pipe; the fire extinguishing liquid supply mechanism includes a liquid supply component and a second safety valve assembly, the second safety valve assembly being disposed on the liquid supply component and connected to the connecting pipe; the fire monitoring mechanism is communicatively connected to both the first and second safety valve assemblies, and is used to monitor the fire condition inside the battery pack, and can open the first and second safety valve assemblies according to the fire condition. This battery fire extinguishing device can provide pre-protection for the battery pack, reducing the risk of damage to the battery system.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery fire extinguishing device and battery system. Background Technology

[0002] Current battery systems typically include a battery pack and a fire suppression system. The fire suppression system consists of a fire extinguishing mechanism and a fire monitoring unit. The fire extinguishing mechanism sprays water mist into the battery pack, while the fire monitoring unit monitors the fire status of the battery pack and controls the fire extinguishing mechanism to spray water mist. When the fire monitoring unit detects a fire inside the battery pack, it issues an alarm signal and controls the fire extinguishing mechanism to spray water mist into the battery pack to suppress the fire.

[0003] However, false alarms from fire monitoring devices frequently occur in battery systems using related technologies. These false alarms can cause fire suppression systems to accidentally release water mist, which can damage the battery packs. This necessitates comprehensive repairs of the entire battery system, and in severe cases, renders the entire system unusable, resulting in significant project losses. Utility Model Content

[0004] Therefore, it is necessary to provide a battery fire extinguishing device and battery system to address the above problems. The battery fire extinguishing device can provide pre-protection for the battery pack and reduce the risk of damage to the battery system.

[0005] On the one hand, a battery fire extinguishing device is provided, applied to a battery system, the battery system comprising a plurality of battery packs, including:

[0006] Connecting pipe;

[0007] A gas-liquid combined nozzle is connected to the connecting pipe and is used to spray fire extinguishing medium into the battery pack;

[0008] A fire extinguishing gas supply mechanism includes a first gas storage component and a first safety valve assembly. The first gas storage component is used to store fire extinguishing gas, and the first safety valve assembly is disposed on the first gas storage component and connected to the connecting pipe.

[0009] A fire extinguishing liquid supply mechanism includes a liquid supply component and a second safety valve component. The liquid supply component stores the fire extinguishing liquid, and the second safety valve component is disposed on the liquid supply component and connected to the connecting pipe.

[0010] The fire monitoring mechanism is communicatively connected to the first safety valve assembly and the second safety valve assembly, respectively. The fire monitoring mechanism is used to monitor the fire condition inside the battery pack and can open the first safety valve assembly to release the extinguishing gas in the first gas storage device and open the second safety valve assembly to release the extinguishing liquid in the liquid supply assembly according to the fire condition.

[0011] In one embodiment, the liquid supply assembly includes a liquid storage unit, a second gas storage unit, a first gas supply pipe, a second gas supply pipe, and a liquid delivery pipe. The liquid storage unit is used to store extinguishing liquid, the second gas storage unit is used to store extinguishing gas, and a second safety valve assembly is disposed on the second gas storage unit and connected to the first gas supply pipe and the second gas supply pipe, respectively. The end of the first gas supply pipe away from the second safety valve assembly and the end of the liquid delivery pipe are both connected to the connecting pipe. The end of the second gas supply pipe away from the second safety valve assembly and the end of the liquid delivery pipe away from the connecting pipe are both connected to the liquid storage unit.

[0012] In one embodiment, the fire extinguishing gas supply mechanism further includes a gas delivery pipe connected between the connecting pipe and the first safety valve assembly.

[0013] In one embodiment, the connecting pipe includes a first pipe and a second pipe, the gas-liquid shared nozzle includes a nozzle and two connectors both connected to the nozzle, the first pipe and the second pipe are respectively connected to the two connectors one-to-one, the gas delivery pipe includes a third gas delivery pipe and a fourth gas delivery pipe both connected to the first safety valve assembly, the end of the third gas delivery pipe away from the first safety valve assembly and the end of the first gas delivery pipe away from the second safety valve assembly are both connected to the first pipe, the end of the fourth gas delivery pipe away from the first safety valve assembly and the end of the liquid delivery pipe away from the liquid storage device are both connected to the second pipe.

[0014] In one embodiment, a first bidirectional valve and a second bidirectional valve are also included. The first bidirectional valve is disposed on the first pipe, and a first inlet of the first bidirectional valve is connected to the first gas supply pipe, and a second inlet of the first bidirectional valve is connected to the third gas supply pipe.

[0015] The second bidirectional valve is installed on the second pipe, the first inlet of the second bidirectional valve is connected to the liquid delivery pipe, and the second inlet of the second bidirectional valve is connected to the fourth gas delivery pipe.

[0016] In one embodiment, the first safety valve assembly includes a first pressure reducing valve, a first container valve and a first pressure signal feedback device, both of which are communicatively connected to the fire monitoring mechanism. The first container valve is disposed on the first gas storage device, the first pressure reducing valve is connected to the first container valve, and the first pressure signal feedback device is connected to the side of the first pressure reducing valve away from the first container valve via a first connecting pipe. The third gas supply pipe and the fourth gas supply pipe are both connected to the first connecting pipe.

[0017] The second safety valve assembly includes a second pressure reducing valve, a second container valve, and a second pressure signal feedback device, both of which are communicatively connected to the fire monitoring mechanism. The second container valve is disposed on the second gas storage device, the second pressure reducing valve is connected to the second container valve, and the second pressure signal feedback device is connected to the side of the second pressure reducing valve away from the second container valve via a second connecting pipe. The first gas supply pipe and the second gas supply pipe are both connected to the second connecting pipe.

[0018] In one embodiment, the system further includes a third connecting pipe, a fourth connecting pipe, and several zone control valves. The third connecting pipe is connected to the first pipe, and the fourth connecting pipe is connected to the second pipe. Each of the third and fourth connecting pipes is equipped with a zone control valve. The zone control valve on the third connecting pipe is connected to one of the connectors of the gas-liquid shared nozzle via a fifth connecting pipe, and the zone control valve on the fourth connecting pipe is connected to the other connector of the gas-liquid shared nozzle via a sixth connecting pipe. The zone control valve is communicatively connected to the fire monitoring mechanism.

[0019] In one embodiment, the fire monitoring mechanism includes a fire detector, a relay module, a sub-control unit, and a main control unit. The fire detector and the zone control valve are both communicatively connected to the main control unit through the relay module and the sub-control unit. The sub-control unit is communicatively connected to the first container valve and the second container valve, respectively. The first pressure signal feedback device and the second pressure signal feedback device are both communicatively connected to the sub-control unit through the main control unit.

[0020] In one embodiment, the fire extinguishing gas supply mechanism further includes a first support, and the first gas storage component is disposed in the first support;

[0021] And / or, the fire extinguishing liquid supply mechanism further includes a second support, wherein the second gas storage device and the liquid storage device are both disposed in the second support.

[0022] On the other hand, a battery system is also provided, including several battery packs and the aforementioned battery fire extinguishing device.

[0023] In the aforementioned battery fire extinguishing device, when the fire monitoring agency first detects a fire inside the battery pack, the fire extinguishing gas supply agency supplies fire extinguishing gas to the gas-liquid common nozzle, causing the gas-liquid common nozzle to spray fire extinguishing gas into the battery pack's casing, thereby providing pre-protection for the battery pack. In this way, if the fire monitoring agency mistakenly determines that there is a fire inside the battery pack, the fire extinguishing gas sprayed into the battery pack will not cause substantial damage to the battery pack, which helps reduce the maintenance work of the battery system and reduces the risk of damage to the battery system. Furthermore, the battery fire suppression system is equipped with separate fire extinguishing gas supply mechanisms and liquid fire extinguishing supply mechanisms. In the event of a fire in the battery pack, fire extinguishing gas can be supplied to the gas-liquid common nozzle through the fire extinguishing gas supply mechanism to suppress the initial small fire. When the fire extinguishing gas in the first gas storage unit is depleted, if the fire monitoring mechanism does not detect a fire inside the battery pack again, there is no need to spray fire extinguishing liquid into the battery pack. If the fire monitoring mechanism detects a fire inside the battery pack again, it will open the second safety valve assembly to release the fire extinguishing liquid in the liquid supply assembly, allowing the gas-liquid common nozzle to spray fire extinguishing liquid into the battery pack, thereby continuing to extinguish the fire in the battery pack. This reduces the probability of the fire extinguishing liquid supply mechanism releasing fire extinguishing liquid, reduces the risk of damage to the battery system due to the release of fire extinguishing liquid, and improves the fire extinguishing effect. Furthermore, in this battery-powered fire extinguishing device, the fire extinguishing gas supply mechanism and the fire extinguishing gas supply mechanism share the same gas-liquid common nozzle and connecting pipe, which reduces the number of components in the battery-powered fire extinguishing device, thereby reducing the space occupied by the battery-powered fire extinguishing device and facilitating the optimization of the structural layout of the battery system. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the battery system in some embodiments of this application.

[0025] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0026] Figure 3 for Figure 1 A magnified view of a section at point B in the middle.

[0027] Figure 4 This is a graph showing the change in oxygen content inside the battery pack when nitrogen is sprayed into the battery pack by a gas-liquid shared nozzle in some embodiments of this application.

[0028] Figure 5 This is a temperature change diagram inside the battery pack when nitrogen is sprayed into the battery pack by a gas-liquid combined nozzle in some embodiments of this application.

[0029] In the picture:

[0030] 1. Connecting pipe; 101. First pipe; 102. Second pipe; 2. Gas-liquid combined nozzle; 3. Extinguishing gas supply mechanism; 301. First gas storage unit; 302. First pressure reducing valve; 303. First pressure signal feedback unit; 304. First container valve; 305. Third gas supply pipe; 306. Fourth gas supply pipe; 307. First support; 4. Extinguishing liquid supply mechanism; 401. Second gas storage unit; 402. Liquid storage unit; 403. Second pressure reducing valve; 404. Second pressure signal feedback unit; 405. Second container valve; 406. 407. First gas supply pipe; 408. Second gas supply pipe; 409. Liquid delivery pipe; 400. Second bracket; 5. Fire monitoring mechanism; 501. Fire detector; 502. Relay module; 503. Sub-control unit; 504. Main control unit; 6. First two-way valve; 7. Second two-way valve; 8. First connecting pipe; 9. Second connecting pipe; 10. Third connecting pipe; 11. Fourth connecting pipe; 12. Zone control valve; 13. Pipe joint; 14. Fifth connecting pipe; 15. Sixth connecting pipe; 100. Battery cluster; 100a. Battery pack. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application.

[0033] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0037] This application provides a battery fire extinguishing device according to an embodiment, which is applied in a battery system. The battery fire extinguishing device is described in detail below with reference to a battery system.

[0038] In some embodiments, a battery system is provided, including a plurality of battery packs 100a and a battery fire extinguishing device. See also... Figures 1 to 3 , Figure 1 The present application shows schematic diagrams of the battery system structure in some embodiments; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 Enlarged view of section B in the diagram. The battery arc extinguishing device includes a connecting pipe 1, a gas-liquid shared nozzle 2, a fire extinguishing gas supply mechanism 3, a fire extinguishing liquid supply mechanism 4, and a fire monitoring mechanism 5. The gas-liquid shared nozzle 2 is connected to the connecting pipe 1 and is used to spray fire extinguishing medium into the battery pack 100a. The battery pack 100a includes a housing and several battery cells disposed inside the housing. In actual implementation, the gas-liquid shared nozzle 2 penetrates the housing and extends into its interior to spray fire extinguishing medium into the housing of the battery pack 100a, thereby suppressing a fire inside the battery pack 100a. The fire extinguishing gas supply mechanism 3 includes a first gas storage component 301 and a first safety valve assembly. The first gas storage component 301 stores fire extinguishing gas, and the first safety valve assembly is disposed on the first gas storage component 301 and connected to the connecting pipe 1. The fire extinguishing liquid supply mechanism 4 includes a liquid supply component and a second safety valve assembly. The liquid supply component stores fire extinguishing liquid, and the second safety valve assembly is disposed on the liquid supply component and connected to the connecting pipe 1. The fire monitoring mechanism 5 is communicatively connected to the first safety valve assembly and the second safety valve assembly. The fire monitoring mechanism 5 is used to monitor the fire condition inside the battery pack 100a, and can open the first safety valve assembly to release the extinguishing gas in the first gas storage unit 301 and open the second safety valve assembly to release the extinguishing liquid in the liquid supply assembly according to the fire condition.

[0039] In this type of battery fire extinguishing device, when the fire monitoring agency 5 first detects a fire inside the battery pack 100a, the fire extinguishing gas supply agency 3 supplies fire extinguishing gas to the gas-liquid common nozzle 2, causing the gas-liquid common nozzle 2 to spray fire extinguishing gas into the battery pack 100a's casing, thereby providing pre-protection for the battery pack 100a. In this way, if the fire monitoring agency 5 misjudges that there is a fire inside the battery pack 100a, the fire extinguishing gas sprayed into the battery pack 100a will not cause substantial damage to the battery pack 100a, which helps to reduce the maintenance work of the battery system and reduce the risk of damage to the battery system. Furthermore, the battery fire extinguishing device is equipped with a fire extinguishing gas supply mechanism 3 and a liquid fire extinguishing supply mechanism. In the event of a fire in the battery pack 100a, fire extinguishing gas can be supplied to the gas-liquid common nozzle 2 through the fire extinguishing gas supply mechanism 3 to suppress the initial weak fire. When the fire extinguishing gas in the first gas storage unit 301 is exhausted, if the fire monitoring mechanism 5 does not detect a fire inside the battery pack 100a again, there is no need to spray fire extinguishing liquid into the battery pack 100a. If the fire monitoring mechanism 5 detects a fire inside the battery pack 100a again, it will open the second safety valve assembly to release the fire extinguishing liquid in the liquid supply assembly, so that the gas-liquid common nozzle 2 sprays fire extinguishing liquid into the battery pack 100a, thereby continuing to extinguish the fire in the battery pack. In this way, the probability of the fire extinguishing liquid supply mechanism 4 releasing fire extinguishing liquid is reduced, the risk of damage to the battery system due to the release of fire extinguishing liquid is reduced, and the fire extinguishing effect is improved. Furthermore, in this battery-powered fire extinguishing device, the fire extinguishing gas supply mechanism 3 and the fire extinguishing gas supply mechanism 3 share the same gas-liquid common nozzle 2 and connecting pipe 1, which reduces the number of components in the battery-powered fire extinguishing device, thereby reducing the space occupied by the battery-powered fire extinguishing device and facilitating the optimization of the structural layout of the battery system.

[0040] In the event of a fire inside battery pack 100a, the fire extinguishing device extinguishes the fire in battery pack 100a as follows: When the fire monitoring mechanism 5 detects a fire inside battery pack 100a, it opens the first safety valve assembly in the fire extinguishing gas supply mechanism 3, allowing the first gas storage unit 301 to release fire extinguishing gas. The released fire extinguishing gas is then transported to the gas-liquid common nozzle 2 through the connecting pipe 1, enabling the gas-liquid common nozzle 2 to spray fire extinguishing gas into the casing of battery pack 100a. Upon release, the fire extinguishing gas rapidly isolates oxygen and lowers the temperature inside the casing, thereby preventing the fire from spreading further inside battery pack 100a. The fire extinguishing gas then stops being released (i.e.,...). After the extinguishing gas in the first gas storage unit 301 is depleted, as the fire inside the battery pack 100a continues to occur (i.e., at least one characteristic parameter associated with thermal runaway, such as temperature or smoke concentration, rises), causing the fire monitoring mechanism 5 to detect a fire inside the battery pack 100a again, the second safety valve assembly in the extinguishing liquid supply mechanism 4 is opened, allowing the liquid supply assembly to release extinguishing liquid. The released extinguishing liquid is then transported to the gas-liquid common nozzle 2 through the connecting pipe 1. The gas-liquid common nozzle 2 sprays extinguishing liquid into the casing of the battery pack 100a, and the extinguishing liquid continues to cool the battery pack 100a, thereby effectively suppressing the fire in the battery pack 100a.

[0041] In actual implementation, when the fire monitoring agency 5 detects a fire for the first time, it issues a command to open the first safety valve assembly to release the extinguishing gas in the first gas storage unit 301, so that the gas-liquid common nozzle 2 sprays the extinguishing gas into the battery pack 100a. After the extinguishing gas in the first gas storage unit 301 is exhausted, if the fire monitoring agency 5 detects a fire inside the battery again, it issues a command to open the second safety valve assembly to release the extinguishing liquid in the liquid supply assembly.

[0042] It is understandable that, since the internal space of the battery pack 100a is usually small, the fire extinguishing gas in the first gas storage unit 301 is basically effective in containing the fire inside the battery pack 100a after the gas-liquid common nozzle 2 has discharged it. Therefore, if the fire monitoring agency 5 detects the fire inside the battery pack 100a again, the time interval between the two detections of the battery pack 100a by the fire monitoring agency 5 is usually a certain amount of time.

[0043] In some embodiments, the liquid supply assembly includes a liquid storage unit 402, a second gas storage unit 401, a first gas supply pipe 406, a second gas supply pipe 407, and a liquid delivery pipe 408. The liquid storage unit 402 is used to store extinguishing liquid, the second gas storage unit 401 is used to store extinguishing gas, and a second safety valve assembly is disposed on the second gas storage unit 401 and connected to the first gas supply pipe 406 and the second gas supply pipe 407 respectively. The end of the first gas supply pipe 406 away from the second safety valve assembly and the end of the liquid delivery pipe 408 are both connected to the connecting pipe 1. The end of the second gas supply pipe 407 away from the second safety valve assembly and the end of the liquid delivery pipe 408 away from the connecting pipe 1 are both connected to the liquid storage unit 402. The specific steps for the disaster monitoring agency to open the second safety valve assembly to release the extinguishing liquid in the liquid supply assembly are as follows: The second safety valve assembly opens the second gas storage unit 401. After the high-pressure extinguishing gas inside the second gas storage unit 401 flows out, it is divided into two paths. One path of extinguishing gas flows into the connecting pipe 1 through the first gas supply pipe 406, and the other path of extinguishing medium flows into the liquid storage unit 402 through the second gas supply pipe 407. The gas pressure forces the extinguishing liquid in the liquid storage unit 402 into the liquid delivery pipe 408 and into the connecting pipe 1, thereby enabling the spraying of fine liquid mist from the gas-liquid common nozzle 2. The fine liquid mist can effectively increase the specific surface area of ​​the extinguishing liquid. When the fine liquid mist encounters the flame, it can instantly vaporize, absorb heat to form steam, which not only reduces the temperature of the fire scene, but also creates a highly efficient oxygen-deficient environment, thereby enabling rapid fire extinguishing and effectively improving the fire extinguishing effect.

[0044] In this example, the gas-liquid dual-use nozzle 2 is a pneumatic acoustic liquid atomizer. In actual implementation, the type of gas-liquid dual-use nozzle 2 can be flexibly selected according to needs. There are no specific restrictions on the type of gas-liquid dual-use nozzle 2 here. Any gas-liquid dual-use nozzle 2 that can be used for both liquid and gas is acceptable.

[0045] It should be noted that the extinguishing gas stored in the first gas storage unit 301 and the second gas storage unit 401 can be the same type of extinguishing gas or different types of extinguishing gas. In this example, the extinguishing gas stored in both the first gas storage unit 301 and the second gas storage unit 401 is nitrogen. Of course, in other examples, the extinguishing gas stored in either the first gas storage unit 301 or the second gas storage unit 401 can be flexibly adjusted according to actual needs. That is, the extinguishing gas in this application is not limited to nitrogen, but can also be other extinguishing gases, such as carbon dioxide, argon, etc. No specific restrictions are placed on the extinguishing gas here.

[0046] It should be noted that the extinguishing liquid stored in the storage container 402 can be water or other extinguishing liquids, such as perfluorohexanone.

[0047] In actual implementation, it was found that when the extinguishing gas stored in the first storage unit is nitrogen, that is, when the extinguishing gas supply mechanism 3 releases nitrogen through the gas-liquid shared nozzle 2, combined with... Figure 4 Nitrogen gas, injected into the battery pack 100a at 0.3 MPa and 0.74 kg / min, can reduce the oxygen content inside the battery pack 100a to zero within 3 minutes. This demonstrates that injecting nitrogen gas into the battery pack 100a through the gas-liquid combined nozzle 2 significantly reduces the necessary conditions for combustion. Furthermore, combined with... Figure 5 Nitrogen gas was injected into the housing of battery pack 100a at a pressure of 0.3 MPa and a flow rate of 0.74 kg / min, and the temperature inside the housing of battery pack 100a dropped significantly.

[0048] In one example, the fire extinguishing gas supply mechanism 3 further includes a first support 307, in which a first gas storage component 301 is disposed to support and fix the first gas storage component 301. The fire extinguishing liquid supply mechanism 4 further includes a second support 409, in which both the second gas storage component 401 and the liquid storage component 402 are disposed to support and fix the second gas storage component 401 and the liquid storage component 402.

[0049] In other examples, the first support 307 may be provided only in the extinguishing gas supply mechanism 3, and the second support 409 may not be provided in the extinguishing liquid supply mechanism 4; or, the first support 307 may not be provided in the extinguishing gas supply mechanism 3, and the second support 409 may be provided only in the extinguishing liquid supply mechanism 4; or, the first support 307 may not be provided in the extinguishing gas supply mechanism 3, and the second support 409 may not be provided in the extinguishing liquid supply mechanism 4, and the first gas storage component 301, the second gas storage component 401, and the liquid storage component 402 may be directly installed on other components.

[0050] In some embodiments, the fire extinguishing gas supply mechanism 3 further includes a gas delivery pipe connected between the connecting pipe 1 and the first safety valve assembly, so that the first safety valve assembly can be connected to the connecting pipe 1 through the gas delivery pipe, so as to connect the connecting pipe 1 and the first mounting valve assembly.

[0051] The connecting pipe 1 includes a first pipe 101 and a second pipe 102. The gas-liquid shared nozzle 2 includes a nozzle and two connectors that are both connected to the nozzle. The first pipe 101 and the second pipe 102 are respectively connected to the two connectors one by one. The gas delivery pipe includes a third gas delivery pipe 305 and a fourth gas delivery pipe 306 that are both connected to the first safety valve assembly. The end of the third gas delivery pipe 305 away from the first safety valve assembly and the end of the first gas delivery pipe 406 away from the second safety valve assembly are both connected to the first pipe 101. The end of the fourth gas delivery pipe 306 away from the first safety valve assembly and the end of the liquid delivery pipe 408 away from the liquid storage device 402 are both connected to the second pipe 102. When the second safety valve assembly opens the second gas storage unit 401, the extinguishing gas flows out of the second gas storage unit 401 and splits into two paths. One path of extinguishing gas flows sequentially through the first gas supply pipe 406 and the first pipe 101 into the gas-liquid common nozzle 2. The other path of extinguishing gas flows through the second gas supply pipe 407 into the liquid storage unit 402. The extinguishing gas presses the extinguishing liquid inside the liquid storage unit 402 into the liquid delivery pipe 408, and then the extinguishing liquid flows through the second pipe 102 into the gas-liquid common nozzle 2. This causes the extinguishing gas in the first pipe 101 and the extinguishing gas in the second pipe 102 to mix at the gas-liquid common nozzle 2, thereby spraying out a fine liquid mist. It can be understood that when the first safety valve assembly opens the first gas storage unit 301, the second safety valve assembly keeps the second gas storage unit 401 closed. When the first safety valve assembly opens the first gas storage unit 301, the extinguishing gas in the first gas storage unit 301 is released and splits into two streams. One stream of extinguishing gas flows sequentially through the third gas supply pipe 305 and the first pipe 101 into the gas-liquid common nozzle 2. The other stream of extinguishing gas flows sequentially through the fourth gas supply pipe 306 and the second pipe 102 into the gas-liquid common nozzle 2. The two streams of extinguishing gas converge at the gas-liquid common nozzle 2 and are then sprayed into the interior of the battery pack 100a. This design allows the connecting pipe 1 to be used simultaneously for both the extinguishing liquid supply mechanism 4 and the extinguishing gas supply mechanism 3, and simplifies the structure of the battery fire extinguishing device.

[0052] To facilitate the control of the flow of extinguishing gas and extinguishing liquid, the battery extinguishing device also includes a first two-way valve 6 and a second two-way valve 7. The first two-way valve 6 is installed on the first pipe 101, and the second two-way valve 7 is installed on the second pipe 102.

[0053] Specifically, the output port of the first two-way valve 6 is connected to the first pipe 101, the first inlet of the first two-way valve 6 is connected to the first gas supply pipe 406, and the second inlet of the first two-way valve 6 is connected to the third gas supply pipe 305. This ensures that the extinguishing gas released by the first gas storage device 301 can flow sequentially through the third gas supply pipe 305 and the first pipe 101, and will not enter the first gas supply pipe 406 from the connection position of the first gas supply pipe 406 and the third gas supply pipe 305. It also ensures that the extinguishing gas released by the second gas storage device 401 can flow sequentially through the first gas supply pipe 406 and the first pipe 101, and will not enter the third supply pipe from the connection position of the first gas supply pipe 406 and the third gas supply pipe 305.

[0054] The output port of the second two-way valve 7 is connected to the second pipe 102, the first inlet of the second two-way valve 7 is connected to the liquid delivery pipe 408, and the second inlet of the second two-way valve 7 is connected to the fourth gas delivery pipe 306, ensuring that the extinguishing gas released by the first gas storage device 301 can flow through the fourth gas delivery pipe 306 and the second pipe 102 in sequence, and will not enter the fourth gas delivery pipe 306 from the connection position of the liquid delivery pipe 408 and the fourth gas delivery pipe 306.

[0055] In some embodiments, the first safety valve assembly includes a first pressure reducing valve 302, a first container valve 304, and a first pressure signal feedback element 303, both of which are communicatively connected to the fire monitoring mechanism 5. The first container valve 304 is disposed on the first gas storage unit 301. The first pressure reducing valve 302 is connected to the first container valve 304. The first pressure signal feedback element 303 is connected to the side of the first pressure reducing valve 302 away from the first container valve 304 via a first connecting pipe 8. The third gas supply pipe 305 and the fourth gas supply pipe 306 are both connected to the first connecting pipe 8 via pipe joints 13. Since both the first container valve 304 and the first pressure signal valve are communicatively connected to the fire monitoring mechanism 5, the fire monitoring mechanism 5 can remotely control the operation of the first container valve 304, enabling it to open and close the first gas storage unit 301. The first pressure signal valve can monitor the pressure of the extinguishing gas released from the first gas storage unit 301 in real time and can feed back the monitored pressure to the fire monitoring mechanism 5. The first pressure reducing valve 302 is used to reduce the amount of extinguishing gas released from the first gas storage unit 301, thereby improving the safety of the battery extinguishing device.

[0056] The second safety valve assembly includes a second pressure reducing valve 403, a second container valve 405, and a second pressure signal feedback element 404, both of which are communicatively connected to the fire monitoring mechanism 5. The second container valve 405 is mounted on the second gas storage unit 401. The second pressure reducing valve 403 is connected to the second container valve 405. The second pressure signal feedback element 404 is connected to the side of the second pressure reducing valve 403 away from the second container valve 405 via a second connecting pipe 9. The first gas supply pipe 406 and the second gas supply pipe 407 are both connected to the second connecting pipe 9 via pipe joints 13. With this structure, the fire monitoring mechanism 5 can remotely control the action of the first container valve 304, enabling the first container valve 304 to open and close the second gas storage unit 401. The second pressure signal valve can monitor the pressure of the extinguishing gas released from the second gas storage unit 401 in real time and can feed back the monitored pressure to the fire monitoring mechanism 5. The first pressure reducing valve 302 is used to reduce the extinguishing gas released from the second gas storage unit 401 to improve the safety of the battery-operated fire extinguishing device.

[0057] In some embodiments, the battery fire extinguishing device further includes a third connecting pipe 10, a fourth connecting pipe 11, and several zone control valves 12. The third connecting pipe 10 is connected to the first pipe 101, and the fourth connecting pipe 11 is connected to the second pipe 102. Zone control valves 12 are installed on both the third and fourth connecting pipes 10 and 11. The zone control valve 12 on the third connecting pipe 10 is connected to one connector of the gas-liquid shared nozzle 2 via a fifth connecting pipe 14, and the zone control valve 12 on the fourth connecting pipe 11 is connected to the other connector of the gas-liquid shared nozzle 2 via a sixth connecting pipe 15. The zone control valves 12 are communicatively connected to the fire monitoring mechanism 5. When the fire monitoring mechanism 5 detects a fire in the battery pack 100a, it opens the zone control valves 12, allowing the extinguishing gas or extinguishing liquid to flow through the zone control valves 12 on the third and fourth connecting pipes 10 and enter the gas-liquid shared nozzle 2 respectively.

[0058] The fire monitoring mechanism 5 includes a fire detector 501, a relay module 502, a sub-control unit 503, and a main control unit 504. The fire detector 501 and the zone control valve 12 are both communicatively connected to the main control unit 504 via the relay module 502 and the sub-control unit 503. The sub-control unit 503 is communicatively connected to the first container valve 304 and the second container valve 405, respectively. The first pressure signal feedback element 303 and the second pressure signal feedback element 404 are both communicatively connected to the sub-control unit 503 via the main control unit 504. The fire detector 501 is installed inside the battery pack housing and is used to acquire at least one characteristic parameter related to thermal runaway inside the battery pack 100a and transmit the acquired characteristic parameter to the sub-control unit 503. The sub-control unit 503 determines whether the received characteristic parameter meets preset conditions. When the characteristic parameter meets the preset conditions, it determines that there is a fire inside the battery pack 100a, and then issues a command to open the zone control valve 12 via the relay module 502. The first pressure signal feedback unit 303 and the second pressure signal feedback unit 404 are both communicatively connected to the sub-control unit 503 via the main control unit 504. The first pressure signal feedback unit 303 feeds back the extinguishing gas opening signal in the first gas storage unit 301 to the sub-control unit 503, activating related linkage signals, and simultaneously remotely transmitting the signal to the main control unit 504. The second pressure signal feedback unit 404 feeds back the extinguishing gas opening signal in the second gas storage unit 401 to the sub-control unit 503, activating related linkage signals, and simultaneously remotely transmitting the signal to the main control unit 504. The characteristic parameters can be temperature, smoke concentration, carbon monoxide concentration, or hydrogen, etc. When these characteristic parameters meet preset conditions, it is determined that the battery pack 100a is in a fire condition. In this example, the fire detector 501 is a composite detector, the sub-control unit 503 is an alarm host, and the main control unit 504 is a fire control center. It can be explained that the characteristic parameter satisfies the preset condition when the characteristic parameter is greater than the set threshold. For example, when the characteristic parameter is temperature, if the fire detector 501 detects that the temperature inside the battery pack 100a is greater than the set temperature threshold, it is determined that the battery pack 100a is in a fire condition. When the characteristic parameters are temperature and smoke concentration, if the fire detector 501 detects that the temperature inside the battery pack 100a is greater than the set temperature threshold, or if the fire detector 501 detects that the smoke concentration inside the battery pack 100a is greater than the set smoke concentration threshold, it is determined that the battery pack 100a is in a fire condition. And so on. The judgment of other characteristic parameters is not listed here.

[0059] When the characteristic parameters detected by the fire detector 501 for the first time meet the set conditions, the sub-control unit 503 issues a command to open the zone control valve 12 through the relay module 502. Simultaneously, the command is sent to the sub-control unit 503, which then outputs a signal to open the first container valve 304. The extinguishing gas in the first gas storage unit 301, after being depressurized by the first pressure reducing valve 302, sequentially passes through the gas delivery pipe, connecting pipe 1, zone control valve 12, and gas-liquid shared nozzle 2, releasing the extinguishing gas into the battery pack 100a's housing. The first pressure signal feedback unit 303 feeds back the signal of the extinguishing gas release from the first gas storage unit 301 to the sub-control unit 503, activating related linkage signals and simultaneously transmitting them remotely to the main control unit 504. After the extinguishing gas release is complete, if the characteristic parameters detected by the fire detector 501 again meet the set conditions, the sub-control unit 503 controls the second container valve 405 to open, causing the gas-liquid shared nozzle 2 to spray a fine liquid mist into the battery pack 100a.

[0060] In some embodiments, the second gas storage unit 401 may not be provided in the fire extinguishing liquid supply mechanism. That is, when the fire extinguishing liquid supply mechanism includes a liquid storage unit 402, a high-pressure pump connected to the second safety valve assembly is provided on the liquid storage unit 402. The high-pressure pump is used to draw the fire extinguishing liquid in the liquid storage unit 402 into the connecting pipe 1 and into the gas-liquid common nozzle 2. The gas-liquid common nozzle 2 then sprays the fire extinguishing liquid. In this way, the battery pack can also be extinguished.

[0061] In some embodiments, the battery system further includes at least two battery clusters 100 and multiple gas-liquid shared nozzles 2. At least two battery clusters 100 are connected in parallel. Each battery cluster 100 includes a relay module 502 and at least two battery packs 100a, with all battery packs 100a within the same battery cluster 100 connected in series.

[0062] Each battery cluster 100 includes at least two battery packs 100a, and each battery cluster 100 corresponds to a relay module 502. When the fire monitoring mechanism 5 includes a fire detector 501 and a sub-control unit 503, the relay module 502 corresponding to each battery cluster 100 is communicatively connected to the sub-control unit 503. Each battery pack 100a corresponds to a gas-liquid shared nozzle 2, a fire detector 501, and a zone control valve 12. In the same battery cluster 100, the fire detector 501 and the zone control valve 12 corresponding to each battery pack 100a are communicatively connected to the relay module 502, so that each fire detector 501 and each zone control valve 12 in the same battery cluster 100 are communicatively connected to the sub-control unit 503 through the relay module 502. In the same battery cluster 100, each battery pack 100a is equipped with a fire detector 501 and a zone control valve 12 that are all connected to the relay module 502. When the fire detector 501 detects a fire inside a battery pack 100a, the sub-control unit 503 can determine the battery pack 100a with a fire through the fire detector 501, and thus open the zone control valve 12 corresponding to the battery pack 100a, so that the gas-liquid shared nozzle 2 corresponding to the battery pack 100a can spray fire extinguishing gas or fine liquid spray, thereby accurately extinguishing the fire inside the battery pack 100a with a fire.

[0063] In the case where the battery system includes at least two battery clusters 100, each battery cluster 100 corresponds to a third connecting pipe 10 and a fourth connecting pipe 11. In this example, there are nine battery clusters 100 connected in parallel, and correspondingly, there are eighteen third connecting pipes 10 and eighteen fourth connecting pipes 11.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery fire extinguishing device, applied to a battery system, said battery system comprising a plurality of battery packs, characterized in that, include: Connecting pipe; A gas-liquid combined nozzle is connected to the connecting pipe and is used to spray fire extinguishing medium into the battery pack; A fire extinguishing gas supply mechanism includes a first gas storage component and a first safety valve assembly. The first gas storage component is used to store fire extinguishing gas, and the first safety valve assembly is disposed on the first gas storage component and connected to the connecting pipe. A fire extinguishing liquid supply mechanism includes a liquid supply component and a second safety valve component. The liquid supply component is used to store fire extinguishing liquid, and the second safety valve component is disposed on the liquid supply component and connected to the connecting pipe. and The fire monitoring mechanism is communicatively connected to the first safety valve assembly and the second safety valve assembly, respectively. The fire monitoring mechanism is used to monitor the fire condition inside the battery pack and can open the first safety valve assembly to release the extinguishing gas in the first gas storage device and open the second safety valve assembly to release the extinguishing liquid in the liquid supply assembly according to the fire condition.

2. The battery fire extinguishing device according to claim 1, characterized in that, The liquid supply assembly includes a liquid storage unit, a second gas storage unit, a first gas supply pipe, a second gas supply pipe, and a liquid delivery pipe. The liquid storage unit is used to store extinguishing liquid, the second gas storage unit is used to store extinguishing gas, and the second safety valve assembly is disposed on the second gas storage unit and connected to the first gas supply pipe and the second gas supply pipe respectively. The end of the first gas supply pipe away from the second safety valve assembly and the end of the liquid delivery pipe are both connected to the connecting pipe. The end of the second gas supply pipe away from the second safety valve assembly and the end of the liquid delivery pipe away from the connecting pipe are both connected to the liquid storage unit.

3. The battery fire extinguishing device according to claim 2, characterized in that, The fire extinguishing gas supply mechanism also includes a gas delivery pipe, which is connected between the connecting pipe and the first safety valve assembly.

4. The battery fire extinguishing device according to claim 3, characterized in that, The connecting pipe includes a first pipe and a second pipe. The gas-liquid shared nozzle includes a nozzle and two connectors, each connected to the nozzle. The first pipe and the second pipe are respectively connected to the two connectors one-to-one. The gas delivery pipe includes a third gas delivery pipe and a fourth gas delivery pipe, both connected to the first safety valve assembly. The end of the third gas delivery pipe away from the first safety valve assembly and the end of the first gas delivery pipe away from the second safety valve assembly are both connected to the first pipe. The end of the fourth gas delivery pipe away from the first safety valve assembly and the end of the liquid delivery pipe away from the liquid storage device are both connected to the second pipe.

5. The battery fire extinguishing device according to claim 4, characterized in that, It also includes a first bidirectional valve and a second bidirectional valve. The first bidirectional valve is disposed on the first pipe. The first inlet of the first bidirectional valve is connected to the first gas supply pipe, and the second inlet of the first bidirectional valve is connected to the third gas supply pipe. The second bidirectional valve is installed on the second pipe, the first inlet of the second bidirectional valve is connected to the liquid delivery pipe, and the second inlet of the second bidirectional valve is connected to the fourth gas delivery pipe.

6. The battery fire extinguishing device according to claim 4, characterized in that, The first safety valve assembly includes a first pressure reducing valve, a first container valve and a first pressure signal feedback device, both of which are communicatively connected to the fire monitoring mechanism. The first container valve is disposed on the first gas storage device. The first pressure reducing valve is connected to the first container valve. The first pressure signal feedback device is connected to the side of the first pressure reducing valve away from the first container valve via a first connecting pipe. The third gas supply pipe and the fourth gas supply pipe are both connected to the first connecting pipe. The second safety valve assembly includes a second pressure reducing valve, a second container valve, and a second pressure signal feedback device, both of which are communicatively connected to the fire monitoring mechanism. The second container valve is disposed on the second gas storage device, the second pressure reducing valve is connected to the second container valve, and the second pressure signal feedback device is connected to the side of the second pressure reducing valve away from the second container valve via a second connecting pipe. The first gas supply pipe and the second gas supply pipe are both connected to the second connecting pipe.

7. The battery fire extinguishing device according to claim 6, characterized in that, It also includes a third connecting pipe, a fourth connecting pipe, and several zone control valves. The third connecting pipe is connected to the first pipe, and the fourth connecting pipe is connected to the second pipe. The zone control valve is provided on both the third and fourth connecting pipes. The zone control valve on the third connecting pipe is connected to one of the connectors of the gas-liquid shared nozzle through a fifth connecting pipe. The zone control valve on the fourth connecting pipe is connected to the other connector of the gas-liquid shared nozzle through a sixth connecting pipe. The zone control valve is communicatively connected to the fire monitoring mechanism.

8. The battery fire extinguishing device according to claim 7, characterized in that, The fire monitoring mechanism includes a fire detector, a relay module, a sub-control unit, and a main control unit. The fire detector and the zone control valve are both connected to the main control unit through the relay module and the sub-control unit. The sub-control unit is connected to the first container valve and the second container valve respectively. The first pressure signal feedback device and the second pressure signal feedback device are both connected to the sub-control unit through the main control unit.

9. The battery fire extinguishing device according to any one of claims 2 to 8, characterized in that, The fire extinguishing gas supply mechanism further includes a first bracket, and the first gas storage component is disposed in the first bracket; And / or, the fire extinguishing liquid supply mechanism further includes a second support, wherein the second gas storage device and the liquid storage device are both disposed in the second support.

10. A battery system, characterized in that, It includes several battery packs and the battery fire extinguishing device as described in any one of claims 1 to 9.

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