A battery-powered fire suppression system and battery equipment

Abstract

This invention discloses a battery-powered fire suppression system and battery equipment, including a first fire suppression device and a second fire suppression device. The first fire suppression device includes a first tank for storing fire suppression liquid, which has a liquid outlet structure. The liquid outlet structure is activated when the change in external temperature exceeds a first threshold and / or the change in external air pressure exceeds a second threshold to discharge the fire suppression liquid in the first tank. The second fire suppression device includes a second tank for storing fire suppression gas, which has a gas outlet structure. The gas outlet structure is activated when the change in external temperature exceeds a third threshold and / or the change in external air pressure exceeds a fourth threshold to discharge the fire suppression gas in the second tank. The discharged fire suppression gas acts on the discharged fire suppression liquid to atomize the fire suppression liquid. The battery-powered fire suppression system of this invention has a simple structure, low cost, reliable operation, rapid overall fire response, and good fire suppression effect.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically, to a battery fire suppression system and a battery device. Background Technology

[0002] Current battery-powered fire suppression systems typically employ PACK-level fire protection, meaning that detectors for monitoring temperature or combustible gases are installed inside or outside the battery compartment. The signals detected by these detectors are transmitted to the fire control panel, which then activates solenoid valves and an air compressor to spray fire extinguishing agents into the battery compartment through conduits. However, existing battery-powered fire suppression systems suffer from problems such as complex structure, high cost, difficult maintenance, numerous and easily malfunctioning components, and poor fire suppression effectiveness. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, this invention proposes a battery-powered fire suppression system. This system has a simple structure, low cost, reliable operation, rapid overall fire response, and good fire suppression effect.

[0005] This invention also proposes a battery device that includes the above-described battery fire suppression system.

[0006] The battery-powered fire suppression system of this invention includes:

[0007] A first fire-fighting device, comprising a first bag for storing fire-fighting liquid, the first bag being provided with a liquid discharge structure, the liquid discharge structure being opened to discharge the fire-fighting liquid in the first bag when the change in external temperature exceeds a first threshold and / or the change in external air pressure exceeds a second threshold.

[0008] The second fire-fighting device includes a second bag for storing fire-fighting gas. The second bag is provided with a gas outlet structure, which is used to open when the change in the external temperature exceeds a third threshold and / or the change in the external air pressure exceeds a fourth threshold to discharge the fire-fighting gas in the second bag.

[0009] Furthermore, the discharged fire-fighting gas acts on the discharged fire-fighting liquid to achieve atomization of the fire-fighting liquid.

[0010] In some embodiments, the first package has a liquid outlet side facing the battery cell, the liquid outlet structure including a plurality of injection holes disposed on the liquid outlet side, the injection holes having a first sealing member for sealing the injection holes, and the first sealing member being heated and contracted to open the injection holes.

[0011] In some embodiments, the liquid outlet structure includes a plurality of weak structural parts disposed on the liquid outlet side, and the first fire-fighting device includes a plate disposed on the outer side of the liquid outlet side. The plate is provided with a plurality of actuating parts, and the plurality of actuating parts are respectively arranged opposite to the plurality of weak structural parts. The actuating parts are used to move toward the weak structural parts and break the weak structural parts under the action of external air pressure.

[0012] In some embodiments, the actuating part includes a piercing part and a plate part. The piercing part is disposed on the side of the plate part facing the first package, and the piercing part is arranged opposite to the weak structural part and is used to pierce the weak structural part. The side of the plate part away from the piercing part is provided with a first concave surface for bearing external air pressure to drive the piercing part to move.

[0013] In some embodiments, the plate is provided with a plurality of ejection holes, the plurality of ejection holes and the plurality of actuating parts are arranged alternately, and the plurality of injection holes are arranged opposite to the plurality of ejection holes one by one;

[0014] And / or, the first sealing element is heat-shrinkable sealant;

[0015] And / or, the weak structural portion is an indentation.

[0016] In some embodiments, the air outlet structure includes a plurality of air jets disposed on the outer periphery of the second pack, the plurality of air jets being arranged at circumferential intervals along the second pack, and a second sealing member being provided in the air jet for sealing the air jet, and the second sealing member being heated and contracted to open the air jet.

[0017] In some embodiments, a plurality of the jet holes are arranged at intervals from the liquid outlet structure and adjacent to the liquid outlet structure in a direction toward the cell.

[0018] In some embodiments, the end of the second package facing the battery cell is provided with a second concave surface for withstanding external air pressure to compress the second package;

[0019] And / or, the second sealing element is heat-shrinkable sealant.

[0020] In some embodiments, a plurality of the first fire-fighting devices are provided, and the plurality of the first fire-fighting devices are arranged extending along a first direction, and the plurality of the first fire-fighting devices are arranged at intervals along a second direction orthogonal to the first direction;

[0021] The second fire-fighting device is provided in multiple units, and the multiple second fire-fighting devices are divided into multiple groups. Each group includes multiple second fire-fighting devices arranged at intervals along the first direction, and each group is located between two adjacent first fire-fighting devices.

[0022] And / or, both the first package and the second package are heated and compressed;

[0023] And / or, the first threshold and the third threshold are the same, and the second threshold and the fourth threshold are the same.

[0024] The battery device of this invention includes a battery fire protection system as described in any of the above embodiments, a plurality of battery cells, and a housing. The battery fire protection system and the plurality of battery cells are all disposed in the housing, and the first fire protection device and the second fire protection device are both connected and fixed to the inner wall of the housing.

[0025] Beneficial effects: The battery fire protection system and battery equipment of the present invention have a simple structure, low cost, reliable operation, rapid overall fire response, and good fire protection effect. Attached Figure Description

[0026] Figure 1 This is a side view of the overall structure of the battery fire suppression system according to an embodiment of the present invention.

[0027] Figure 2 yes Figure 1 A schematic diagram of the liquid outlet side of the first package.

[0028] Figure 3 yes Figure 1 Schematic diagram of the middle plate component.

[0029] Figure 4 yes Figure 1 A magnified view of a portion of point A in the middle.

[0030] Figure 5 This is a side view of the second package.

[0031] Figure 6 This is a top-down view of the second package.

[0032] Figure 7 This is a schematic diagram showing the arrangement of multiple first fire-fighting devices and multiple second fire-fighting devices according to an embodiment of the present invention.

[0033] Figure 8 This is a side cross-sectional view of a battery device according to an embodiment of the present invention.

[0034] Figure label:

[0035] 100-Battery Fire Suppression System;

[0036] 1-First fire-fighting device; 11-First package; 111-Liquid outlet structure; 1111-Spray hole; 1112-Weak structural part; 112-First sealing part; 12-Plate; 121-Actuating part; 1211-Piercing part; 1212-Plate part; 1213-First concave surface; 122-Spray hole;

[0037] 2-Second fire-fighting device; 21-Second packing; 211-Air outlet structure; 2111-Air jet hole; 2112-Second sealing element; 212-Second concave surface;

[0038] 200- Enclosure;

[0039] 300-cell. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0041] This invention is based on the inventor's discoveries and understanding of the following facts and problems:

[0042] In related technologies, battery-powered fire protection systems typically include fire control panels, fire-fighting medium storage tanks, smoke detectors, temperature detectors, and piping. The overall structure is complex, costly, and difficult to maintain. Furthermore, if any component such as the fire control panel, fire-fighting medium storage tank, smoke detector, temperature detector, or piping fails, the entire container system's fire protection system will malfunction, thus failing to provide normal fire protection and posing a significant fire hazard.

[0043] like Figure 1 As shown, the battery fire protection system 100 of this embodiment includes a first fire protection device 1 and a second fire protection device 2.

[0044] The first fire-fighting device 1 includes a first package 11 for storing fire-fighting liquid. The first package 11 is provided with a liquid discharge structure 111, which is used to open when the change in the external temperature exceeds a first threshold and / or the change in the external air pressure exceeds a second threshold to discharge the fire-fighting liquid in the first package 11.

[0045] For example, the fire-fighting liquid can be a liquid with fire-fighting and extinguishing functions, such as perfluoroethyl ketone, and the fire-fighting liquid can be pre-filled into the first package 11. The liquid outlet structure 111 can be a perforated structure, etc., and the liquid outlet structure 111 has a self-opening function.

[0046] The first fire-fighting device 1 can be installed inside the battery. When a local cell 300 of the battery experiences thermal runaway, the temperature inside the battery will rise. When the temperature rises to the allowable temperature threshold (first threshold), the liquid outlet structure 111 will open automatically, thereby discharging the fire-fighting liquid through the liquid outlet structure 111, thus achieving the effect of fire-fighting and suppressing the spread of thermal runaway.

[0047] It should be noted that when a local cell 300 experiences thermal runaway, the cell 300 will generate a large amount of high-temperature flammable gas, which will increase the gas pressure inside the battery. When the gas pressure rises to the allowable gas pressure threshold (second threshold), the liquid outlet structure 111 can also open automatically, thereby allowing the fire-fighting liquid to be discharged through the liquid outlet structure 111, thus achieving the effect of fire-fighting and suppressing the spread of thermal runaway.

[0048] The second fire-fighting device 2 includes a second package 21 for storing fire-fighting gas. The second package 21 is provided with a gas outlet structure 211, which is used to open when the change in the external temperature exceeds a third threshold and / or the change in the external air pressure exceeds a fourth threshold to discharge the fire-fighting gas in the second package 21.

[0049] For example, the fire-fighting gas can be nitrogen or other gases with fire-fighting and extinguishing functions, and the fire-fighting gas can be pre-filled in the second bag 21. The gas outlet structure 211 can also be a perforated structure, and the gas outlet structure 211 also has a self-opening function.

[0050] The second fire-fighting device 2 can also be installed inside the battery. When a local cell 300 of the battery experiences thermal runaway, the temperature inside the battery will rise. When the temperature rises to the allowable temperature threshold (third threshold), the venting structure 211 will open automatically, thereby allowing the fire-fighting gas to be discharged through the venting structure 211, thus achieving the effect of fire-fighting and suppressing the spread of thermal runaway.

[0051] It should be noted that when a local cell 300 experiences thermal runaway, the cell 300 will generate a large amount of high-temperature flammable gas, which will increase the gas pressure inside the battery. When the gas pressure rises to the allowable gas pressure threshold (fourth threshold), the venting structure 211 can also open automatically, thereby allowing the fire-fighting gas to be discharged through the venting structure 211, thus achieving the effect of fire-fighting and suppressing the spread of thermal runaway.

[0052] It should be noted that the aforementioned fire-fighting gas and fire-fighting liquid can be discharged simultaneously. In this case, the discharged fire-fighting gas will act on the discharged fire-fighting liquid, thereby achieving atomization of the fire-fighting liquid. This allows the mixed medium formed by the fire-fighting gas and fire-fighting liquid to be fully mixed and quickly fill the entire battery, thereby shortening the fire response time and improving the overall fire-fighting effect.

[0053] The battery fire suppression system 100 of this invention only has a first fire suppression device 1 and a second fire suppression device 2. Both the first fire suppression device 1 and the second fire suppression device 2 can automatically drain liquid or vent air by changing temperature and air pressure. This avoids the need to install sensors, main units, etc. in the prior art, simplifies the overall structural layout, and reduces the overall cost.

[0054] Secondly, due to the simplification of the overall structure, compared with complex structural forms, this simplified structure is more reliable in operation, thus avoiding the problem of fire failure caused by the damage of any component when there are many structural parts, and ensuring the reliability and stability of use.

[0055] In addition, the sprayed fire-fighting gas can atomize the fire-fighting liquid, thereby enabling the fire-fighting liquid to be evenly and quickly filled to all parts of the battery, shortening the overall fire response time and improving the overall fire-fighting effect.

[0056] In some embodiments, the first package 11 has a liquid outlet side facing the cell 300, and the liquid outlet structure 111 includes a plurality of spray holes 1111 disposed on the liquid outlet side. The spray holes 1111 are provided with a first sealing member 112 for sealing the spray holes 1111, and the first sealing member 112 is heated and compressed to open the spray holes 1111.

[0057] For example, the liquid outlet side can be the bottom side of the first package 11, meaning the battery cell 300 can be installed on the bottom side of the first package 11. Figure 2 As shown, the multiple injection holes 1111 can all be circular holes, and the multiple injection holes 1111 can be evenly arranged in a matrix on the bottom side of the first package 11. Each injection hole 1111 can be fitted with a first sealing element 112, and the material of the first sealing element 112 can be heat shrink sealant.

[0058] Under normal conditions, the first sealing element 112 can seal the corresponding spray hole 1111, thereby preventing the discharge of fire-fighting liquid. When the temperature inside the battery gradually rises, the first sealing element 112 will contract and eventually release the seal on the spray hole 1111, at which point the fire-fighting liquid can flow out from the spray hole 1111.

[0059] In some embodiments, the liquid outlet structure 111 includes a plurality of weak structural parts 1112 disposed on the liquid outlet side, and the first fire-fighting device 1 includes a plate 12 disposed on the outer side of the liquid outlet side. The plate 12 is provided with a plurality of actuating parts 121, which are respectively arranged opposite to the plurality of weak structural parts 1112. The actuating parts 121 are used to move toward the weak structural parts 1112 under the action of external air pressure and cause the weak structural parts 1112 to break.

[0060] For example, such as Figure 2 As shown, the weak structural part 1112 can be a region with weak structural strength on the wall of the first package 11. The weak structural part 1112 can be formed by reducing the local wall thickness of the package wall, so that the first package 11 can be easily broken from the weak structural part 1112.

[0061] like Figure 3As shown, the plate can be generally long and plate-shaped. The plate can be located on the bottom side of the first package 11. Multiple functional parts 121 can be fixed on the plate. The functional parts 121 can be conical structures, etc., and the multiple functional parts 121 can be located directly below the multiple weak structural parts 1112.

[0062] As the internal pressure of the battery increases, the plate deforms under the pressure, which can be understood as a sudden increase in pressure. At this time, the plate will cause the aforementioned action part 121 to move upward. The upward-moving action part 121 can directly act on the corresponding weak structural part 1112 and break through it, thereby meeting the fire-fighting requirement of discharging fire-fighting liquid under different internal pressure conditions of the battery.

[0063] In some embodiments, the actuating part 121 includes a piercing part 1211 and a plate part 1212. The piercing part 1211 is provided on the side of the plate part 1212 facing the first package 11, and the piercing part 1211 is arranged opposite to the weak structural part 1112 and is used to pierce the weak structural part 1112. The side of the plate part 1212 away from the piercing part 1211 is provided with a first concave surface 1213 for bearing external air pressure to drive the piercing part 1211 to move.

[0064] For example, such as Figure 4 As shown, the piercing portion 1211 can be generally conical, and the plate portion 1212 can be generally flat. The plate portion 1212 can be fixed to the bottom side of the piercing portion 1211, and the left and right sides of the plate portion 1212 can be folded downwards. The first concave surface 1213 can be generally arc-shaped, and the first concave surface 1213 is located on the bottom side of the plate portion 1212.

[0065] In use, the first concave surface 1213 can be directly opposite the battery cell 300, and the gas discharged from the battery cell 300 can directly act on the first concave surface 1213, thereby ensuring the effect of driving the puncture part 1211 to move upward.

[0066] In some embodiments, the plate 12 is provided with a plurality of ejection holes 122, and the plurality of ejection holes 122 and a plurality of actuating parts 121 are arranged alternately, with a plurality of injection holes 1111 arranged opposite to the plurality of ejection holes 122. For example, as Figure 3 As shown, the nozzle 122 can be a rectangular hole, and multiple nozzles 122 and the aforementioned multiple functional parts 121 can be arranged alternately in the left-right direction. The nozzle 122 can be located directly below the corresponding spray hole 1111. This facilitates the discharge of fire-fighting liquid through the spray hole 1111 and the nozzle 122, avoiding obstruction of the discharged fire-fighting liquid by the plate.

[0067] In some embodiments, the weak structural portion 1112 is an indentation. For example, as... Figure 2As shown, the indentation can be a cross-shaped indentation, which can be laser-engraved, thus facilitating the processing and formation of the weak structural part 1112.

[0068] In some embodiments, the air outlet structure 211 includes a plurality of air jet holes 2111 disposed on the outer peripheral side of the second package 21. The plurality of air jet holes 2111 are arranged at intervals along the circumference of the second package 21. A second sealing member 2112 for sealing the air jet hole 2111 is provided inside the air jet hole 2111, and the second sealing member 2112 is heated and compressed to open the air jet hole 2111.

[0069] For example, such as Figure 5 and Figure 6 As shown, the second package 21 can be generally cylindrical. The circumferential sidewalls of the second package 21 can be provided with multiple air jet holes 2111, which can be arranged at equal intervals along the circumference of the second package 21. Each air jet hole 2111 can be a circular hole, and each air jet hole 2111 is fitted with a second sealing element 2112, which can also be made of heat-shrinkable sealant.

[0070] Under normal conditions, the second sealing element 2112 can seal the corresponding jet hole 2111, thereby preventing the venting of fire-fighting gas. When the temperature inside the battery gradually rises, the second sealing element 2112 will contract and eventually release the seal on the jet hole 2111, at which point the fire-fighting gas can flow out from the jet hole 2111.

[0071] In some embodiments, a plurality of jet holes 2111 are arranged at intervals from the liquid outlet structure 111 and adjacent to the battery cell 300 along the direction toward the battery cell 300. Specifically, the direction toward the battery cell 300 can be vertical, and each jet hole 2111 can be located below the aforementioned jet hole 1111 and arranged at a certain distance from the jet hole 1111. This allows the fire-fighting gas ejected from the jet holes 2111 to fully act on the ejected fire-fighting liquid, thereby helping to ensure the overall atomization effect.

[0072] In some embodiments, the end of the second package 21 facing the cell 300 is provided with a second concave surface 212 for withstanding external air pressure to compress the second package 21. For example, as Figure 5 As shown, the second concave surface 212 can be the bottom surface of the second package 21. The second concave surface 212 can be a partially spherical surface, and the second concave surface 212 can be arranged directly opposite the corresponding battery cell 300.

[0073] When cell 300 experiences thermal runaway, the gas released from cell 300 can directly act on the second concave surface 212. At this time, the second concave surface 212 will be compressed, squeezing the second pack 21. The gas pressure inside the second pack 21 will also increase. When the pressure exceeds the sealing effect of the second sealing member 2112 on the jet hole 2111, the second sealing member 2112 will be ejected. At this time, the fire-fighting gas will be discharged through the jet hole 2111. This satisfies the fire-fighting requirement of discharging fire-fighting gas under different gas pressure conditions inside the battery.

[0074] In some embodiments, there are multiple first fire-fighting devices 1, each extending along a first direction and spaced apart along a second direction orthogonal to the first direction. There are multiple second fire-fighting devices 2, which are divided into multiple groups. Each group includes multiple second fire-fighting devices 2 spaced apart along the first direction, and each group is located between two adjacent first fire-fighting devices 1.

[0075] For example, such as Figure 7 As shown, the first direction can be left and right, the second direction can be front and back, and there can be four first fire-fighting devices 1. Each first fire-fighting device 1 can be a strip structure and can be arranged along the left and right direction. The four first fire-fighting devices 1 can be arranged at equal intervals along the front and back direction.

[0076] The second fire-fighting device 2 can be provided in three sets, each set including multiple second fire-fighting devices 2 arranged at equal intervals in the left-right direction, and the three sets of second fire-fighting devices 2 and the four first fire-fighting devices 1 can be arranged alternately in the front-back direction. In this way, on the one hand, the uniform arrangement of the first fire-fighting devices 1 and the second fire-fighting devices 2 is achieved, and on the other hand, the first fire-fighting devices 1 can be distributed around the second fire-fighting devices 2, thereby fully ensuring the atomization of the sprayed fire-fighting gas.

[0077] In some embodiments, both the first package 11 and the second package 21 are thermally compressed. For example, both the first package 11 and the second package 21 can be made of a material that is thermally compressible, such as polyethylene. Therefore, in the event of thermal runaway of a portion of the battery cell 300, the first package 11 and the second package 21 can be thermally compressed, thereby increasing the pressure within the first package 11 and the second package 21. This facilitates the release of the sealing of the first sealing member 112 and the second sealing member 2112, ensuring the timely discharge of fire-fighting liquids and gases.

[0078] In some embodiments, the first threshold and the third threshold are the same, and the second threshold and the fourth threshold are the same. This allows the first fire-fighting device 1 and the second fire-fighting device 2 to discharge fire-fighting liquid and fire-fighting gas almost simultaneously, thereby ensuring the synchronicity of the fire-fighting actions of the first fire-fighting device 1 and the second fire-fighting device 2, and further ensuring the atomization effect.

[0079] The battery device according to an embodiment of the present invention is described below.

[0080] The battery device of this invention includes a battery fire protection system 100, a plurality of battery cells 300 and a housing 200. The battery fire protection system 100 can be the battery fire protection system 100 described in any of the above embodiments. The battery fire protection system 100 and the plurality of battery cells 300 are all disposed inside the housing 200, and the first fire protection device 1 and the second fire protection device 2 are both connected and fixed to the inner wall of the housing 200.

[0081] For example, such as Figure 8 As shown, the box body 200 can be a plug-in box, and the box body 200 can include a box cover and a box bottom, wherein the box cover can be installed above the box bottom and sealed to the box bottom. The first package 11 and plate 12 of the first fire-fighting device 1 can be fixed to the inner wall of the top side of the box cover by adhesive, and the second package 21 of the second fire-fighting device 2 can also be fixed to the inner wall of the top side of the box cover by adhesive.

[0082] The following describes a specific example of a battery device according to an embodiment of the present invention.

[0083] The fire protection system of the battery device in this embodiment of the invention mainly consists of two parts: a fire-fighting medium pack device (which can be regarded as the first fire-fighting device 1) and a nitrogen pack device (which can be regarded as the second fire-fighting device 2).

[0084] The fire-fighting medium pack device consists of a fire-fighting medium pack (which can be considered as the first pack 11) and a base plate (which can be considered as a plate 12). The fire-fighting medium pack consists of fire-fighting medium (which can be considered as fire-fighting liquid), fixing adhesive, heat-shrinkable pack, heat-shrinkable sealant, spray hole 1111, and cross-shaped indentation. The base plate consists of a piercing corner (which can be considered as the working part 121), fixing adhesive, a pressure-bearing concave surface (first concave surface 1213), and a spray groove.

[0085] The nitrogen tank unit consists of a fixing adhesive, nitrogen, heat shrink tubing, heat shrink sealant, air vents, and a pressure-bearing concave surface (second concave surface 212). The nitrogen tank unit, fire-fighting medium tank, and base plate are glued to the tank cover with the fixing adhesive, reducing mechanical connections, reducing the height of the tank, and saving materials.

[0086] When cell 300 experiences thermal runaway, a large amount of high-temperature flammable gas will be generated inside the battery casing 200.

[0087] 1. Temperature sensing fire protection:

[0088] The heat-shrinkable bag of the fire-fighting medium pack device is made of a material that shrinks when heated. When the heat-shrinkable bag is in a high-temperature environment, it shrinks inward, reducing the space and compressing the fire-fighting medium inside. The pressure increases, and when the pressure exceeds the adhesive force between the heat-shrinkable sealant and the heat-shrinkable bag, the fire-fighting medium can be sprayed out from the spray hole and then through the spray groove of the base plate to extinguish and cool the battery module. As the thermal runaway temperature rises and the time continues, all the fire-fighting medium inside the heat-shrinkable bag can be sprayed out, thus ensuring the amount of fire-fighting medium used.

[0089] The spray nozzles are arranged in the required number at the bottom of the heat shrink package. The total number of spray nozzles can cover the upper space of the entire module, thus effectively spraying the entire module and ensuring that the entire module is within the spray range of the fire-fighting medium.

[0090] 2. Pressure-sensitive fire suppression:

[0091] A cross-shaped indentation is laser-etched between the two injection holes at the bottom of the heat-shrinkable package of the fire-fighting medium device. Thermal runaway generates a large amount of high-temperature flammable gas, which increases the pressure inside the sealed package. The high-pressure gas pushes each compressed concave surface upward, and the piercing angle on the compressed concave surface also moves upward. The piercing angle directly opposite the center of the cross-shaped indentation will pierce the cross-shaped indentation. As all the piercing angles move upward, all the cross-shaped indentations are pierced, and the fire-fighting medium is squeezed and ejected from the ruptured cross-shaped indentation by the pressure below.

[0092] The cross-shaped indentations are arranged in the required number on the bottom of the heat shrink bag, covering the upper space of the entire module. This allows for effective full-area spraying of the module, ensuring that the entire module is within the range of the fire-fighting medium.

[0093] 3. Gas-liquid two-phase fire suppression:

[0094] The nitrogen gas reservoir is filled with nitrogen gas at a certain pressure.

[0095] Heat shrink bags are made of materials that shrink when heated. When the heat shrink bag is in a high-temperature environment, it shrinks inward, reducing the space. The nitrogen gas inside the heat shrink bag is compressed, and the pressure increases. When the pressure exceeds the adhesive force between the heat shrink sealant and the heat shrink bag, the nitrogen gas can be ejected from the injection hole. As the thermal runaway temperature rises and the time continues, all the nitrogen gas inside the heat shrink bag can be ejected.

[0096] High-pressure gas pushes each of the compressed concave surfaces of the nitrogen reservoir upwards, whereby the pressure from below forces the nitrogen gas to be expelled from the injection holes.

[0097] The nitrogen gas tank device can spray nitrogen gas horizontally from its nozzles, while the fire-fighting medium tank device can spray liquid fire-fighting medium vertically downwards from its nozzles. The nitrogen gas sprayed horizontally from the nitrogen gas tank device disperses the liquid fire-fighting medium sprayed vertically downwards from the fire-fighting medium tank device, thus allowing the gaseous nitrogen gas and liquid fire-fighting medium to mix and form atomization. The mixture of nitrogen gas and liquid fire-fighting medium can quickly fill the compartment space for fire extinguishing, achieving compartment fire-fighting.

[0098] The entire fire-fighting system relies on temperature and pressure sensors to automatically start and spray fires. It does not require a fire control panel, fire-fighting medium storage tank, smoke detectors, temperature detectors, pipelines, or other components. It is simple, reliable, economical, and practical.

[0099] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 this invention.

[0100] Furthermore, the terms "first" and "second" are used 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 as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0101] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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, an electrical connection, or a connection that allows communication between them; 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 explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0102] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of 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. "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.

[0103] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0104] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A battery-powered fire suppression system, characterized in that, include: A first fire-fighting device, comprising a first bag for storing fire-fighting liquid, the first bag being provided with a liquid discharge structure, the liquid discharge structure being opened to discharge the fire-fighting liquid in the first bag when the change in external temperature exceeds a first threshold and / or the change in external air pressure exceeds a second threshold. The second fire-fighting device includes a second bag for storing fire-fighting gas. The second bag is provided with a gas outlet structure, which is used to open when the change in the external temperature exceeds a third threshold and / or the change in the external air pressure exceeds a fourth threshold to discharge the fire-fighting gas in the second bag. Furthermore, the discharged fire-fighting gas acts on the discharged fire-fighting liquid to achieve atomization of the fire-fighting liquid; The first package has a liquid outlet side facing the battery cell. The liquid outlet structure includes a plurality of injection holes disposed on the liquid outlet side. The injection holes are provided with a first sealing member for sealing the injection holes. The first sealing member is heated and compressed to open the injection holes. The air outlet structure includes a plurality of air jet holes disposed on the outer periphery of the second package. The plurality of air jet holes are arranged at intervals along the circumference of the second package. A second sealing member is provided inside the air jet hole for sealing the air jet hole, and the second sealing member is heated and compressed to open the air jet hole. Along the direction toward the battery cell, a plurality of the jet holes are arranged at intervals from the liquid outlet structure and adjacent to the battery cell relative to the liquid outlet structure; The second package has a second concave surface at the end facing the battery cell to withstand external air pressure that could compress the second package; And / or, the second sealing element is heat-shrinkable sealant.

2. The battery-powered fire suppression system according to claim 1, characterized in that, The liquid outlet structure includes a plurality of weak structural parts disposed on the liquid outlet side. The first fire-fighting device includes a plate disposed on the outer side of the liquid outlet side. The plate is provided with a plurality of working parts. The plurality of working parts are arranged opposite to the plurality of weak structural parts respectively. The working parts are used to move toward the weak structural parts under the action of external air pressure and cause the weak structural parts to break.

3. The battery-powered fire suppression system according to claim 2, characterized in that, The functional part includes a piercing part and a plate part. The piercing part is located on the side of the plate part facing the first package. The piercing part is arranged opposite to the weak structural part and is used to pierce the weak structural part. The side of the plate part away from the piercing part is provided with a first concave surface for bearing external air pressure to drive the piercing part to move.

4. The battery-powered fire suppression system according to claim 2, characterized in that, The plate is provided with a plurality of ejection holes, and the plurality of ejection holes and the plurality of functional parts are arranged alternately, with the plurality of injection holes and the plurality of ejection holes arranged opposite to each other; And / or, the first sealing element is heat-shrinkable sealant; And / or, the weak structural portion is an indentation.

5. The battery-powered fire suppression system according to any one of claims 1-4, characterized in that, The first fire-fighting device is provided in multiple ways, and the multiple first fire-fighting devices are arranged to extend along a first direction, and the multiple first fire-fighting devices are arranged at intervals along a second direction orthogonal to the first direction; The second fire-fighting device is provided in multiple units, and the multiple second fire-fighting devices are divided into multiple groups. Each group includes multiple second fire-fighting devices arranged at intervals along the first direction, and each group is located between two adjacent first fire-fighting devices. And / or, both the first package and the second package are heated and compressed; And / or, the first threshold and the third threshold are the same, and the second threshold and the fourth threshold are the same.

6. A battery device, characterized in that, The device includes a battery fire suppression system as described in any one of claims 1-5, a plurality of battery cells, and a housing, wherein the battery fire suppression system and the plurality of battery cells are all disposed within the housing, and the first fire suppression device and the second fire suppression device are both connected and fixed to the inner wall of the housing.

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