Hollow fiber fire extinguishing device for new energy automobile battery

Abstract

The utility model discloses a new energy automobile battery hollow fiber fire extinguishing device, and relates to the technical field of new energy automobile fire fighting equipment, the new energy automobile battery hollow fiber fire extinguishing device comprises a shell assembly, an installation cavity is arranged in the shell assembly, and the shell assembly is provided with an air inlet, an air outlet and a fire extinguishing agent output interface which are communicated with the installation cavity; the air inlet compression assembly is arranged in the mounting cavity, one end of the air inlet compression assembly is connected with the air inlet, and the air inlet compression assembly is used for sucking and filtering external air and compressing the air; the nitrogen-oxygen separation assembly is arranged in the mounting cavity; wherein the nitrogen-oxygen separation assembly comprises a mounting shell and a nitrogen-oxygen separation hollow fiber membrane, and the problems that an existing nitrogen fire extinguishing device is large in occupied space, discontinuous in gas supply and slow in response are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy automobile fire fighting equipment technical field, concretely relates to a new energy automobile battery hollow fiber fire extinguishing device. BACKGROUND

[0002] The nitrogen fire extinguishing technology of the new energy automobile battery box widely used at present has many drawbacks. In terms of space adaptability, the high-pressure nitrogen gas tank is large in size and heavy in quality, which is contrary to the compact design concept of high-energy-density battery pack, occupies the internal space of the battery pack, and limits the improvement and layout optimization of the battery capacity; in terms of gas supply capacity, the nitrogen gas storage in the tank is fixed, which is difficult to meet the fire extinguishing demand under multiple thermal runaway scenarios, and frequent self-checking of the fire extinguishing device will accelerate the consumption of nitrogen gas, which cannot be replenished in time, resulting in insufficient fire extinguishing persistence; in terms of response speed, the traditional nitrogen making equipment relies on external gas source, the starting process is complicated, the response time is long, and it is difficult to quickly suppress the spread of fire in the golden time of the initial stage of battery thermal runaway, missing the best fire extinguishing opportunity.

[0003] These deficiencies seriously weaken the effectiveness of the fire extinguishing system, and a new type of fire extinguishing device is urgently needed. CONTENT OF THE UTILITY MODEL

[0004] Therefore, in view of the above problems, the utility model provides a new energy automobile battery hollow fiber fire extinguishing device, which solves the problems of large space occupation, discontinuous gas supply and slow response of the current nitrogen fire extinguishing equipment.

[0005] The technical scheme of the utility model is:

[0006] A new energy automobile battery hollow fiber fire extinguishing device, comprising:

[0007] A shell assembly is provided with an installation cavity inside, and the shell assembly is provided with an air inlet, an air outlet and a fire extinguishing agent output interface communicated with the installation cavity;

[0008] An air inlet compression assembly is arranged in the installation cavity, and one end of the air inlet compression assembly is connected with the air inlet, for filtering the external air and compressing the air;

[0009] A nitrogen-oxygen separation assembly is arranged in the installation cavity;

[0010] The nitrogen-oxygen separation assembly comprises a mounting shell and a nitrogen-oxygen separation hollow fiber membrane, the mounting shell is provided with a compressed gas inlet, a nitrogen gas outlet and an oxygen gas outlet, the compressed gas inlet is connected with the other end of the gas inlet compression assembly, the oxygen gas outlet is connected with the gas outlet through a first pipeline, the nitrogen gas outlet is connected with the fire extinguishing agent output interface through a second pipeline, the nitrogen-oxygen separation hollow fiber membrane is arranged in the mounting shell, one end of the nitrogen-oxygen separation hollow fiber membrane is connected with the compressed gas inlet, and the other end is connected with the nitrogen gas outlet, so as to separate the oxygen in the compressed air and output the purified nitrogen.

[0011] Preferably, the gas inlet compression assembly comprises a filter structure and an air compression pump connected in sequence, one end of the filter structure is connected with the gas inlet, and the other end is connected with the input port of the air compression pump, and the output port of the air compression pump is connected with the compressed gas inlet through a third pipeline.

[0012] Preferably, the filter structure comprises a filter shell and a pulse dust removal filter element, the filter shell is provided with a containing cavity, the pulse dust removal filter element is arranged in the containing cavity, and the filter shell is used for filtering particulate matters in air, one end of the filter shell is provided with a filter inlet in communication with the containing cavity, the other end is provided with a filter outlet in communication with the containing cavity, the filter inlet is connected with the gas inlet, and the filter outlet is connected with the input port of the air compression pump through a fourth pipeline.

[0013] Preferably, the mounting shell and the shell assembly are detachably connected through a pair of fixing pieces, the pair of fixing pieces are respectively located at two ends of the mounting shell and are detachably connected with the shell assembly.

[0014] Preferably, the pair of fixing pieces each comprises a fixing block, and the fixing block is detachably connected with the shell assembly through bolts at two ends.

[0015] Preferably, the shell assembly is provided with a pressure relief valve, and one end of the pressure relief valve is connected with the second pipeline through a fifth pipeline.

[0016] Preferably, the shell assembly comprises a shell main body and a shell cover, the mounting cavity is arranged in the shell main body and penetrates through the top of the shell main body, and the shell cover is arranged on the top of the shell main body and detachably connected with the shell main body through bolts.

[0017] Preferably, the shell main body is provided with an ACC interface electrically connected with the air compression pump, the ACC interface is electrically connected with the new energy automobile battery, and the ACC interface is used for supplying power to the air compression pump.

[0018] Preferably, the mounting cavity is provided with a backup power supply assembly, and the backup power supply assembly is used for supplying power to the air compression pump when the new energy automobile battery is powered off.

[0019] Preferably, the backup power supply assembly comprises a power supply mounting box and a power supply battery, the power supply mounting box is detachably connected with the shell assembly through bolts, the power supply mounting box is provided with a battery mounting groove, the power supply battery is mounted in the battery mounting groove, and the power supply battery is electrically connected with the air compression pump.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] 1. Small space occupation: the new energy automobile battery hollow fiber fire extinguishing device of the utility model discloses the traditional high-pressure nitrogen tank is given up, and nitrogen preparation and output are realized through the integrated shell assembly, the air compression assembly and the nitrogen-oxygen separation assembly, so that no additional large gas storage space is needed, and the compact design requirement of the high-energy-density battery pack can be well adapted, more space is saved in the battery pack for battery capacity improvement and layout optimization.

[0022] 2. Continuous and stable gas supply: the new energy automobile battery hollow fiber fire extinguishing device of the utility model utilizes external air as the gas source, as long as the vehicle battery power supply is normal, the air compression assembly and the nitrogen-oxygen separation assembly can continuously work, and nitrogen is continuously separated. Whether facing multiple thermal runaway events or dealing with the nitrogen consumption of frequent self-checking of the fire extinguishing device, stable nitrogen supply can be ensured to ensure that the fire extinguishing system can function at any time.

[0023] 3. Fast response speed: the new energy automobile battery hollow fiber fire extinguishing device of the utility model does not need to rely on a high-pressure nitrogen tank, and once the battery box is detected to be abnormal, the air compression assembly and the nitrogen-oxygen separation assembly can be directly started, the process from air compression to nitrogen output can be quickly completed, nitrogen can be quickly sprayed to the fire area in the key time of the initial stage of battery thermal runaway, the spread of fire can be effectively inhibited, and the fire extinguishing efficiency and effect are greatly improved.

[0024] The new energy automobile battery hollow fiber fire extinguishing device of the utility model effectively solves the problems of large space occupation, discontinuous gas supply and slow response of the current nitrogen fire extinguishing equipment. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the scope, and for those skilled in the art, other related drawings can be obtained without creative labor on the basis of these drawings.

[0026] Fig. 1 It is a structure schematic view of the new energy automobile battery hollow fiber fire extinguishing device in the embodiments of the utility model;

[0027] Fig. 2 is a partial structure schematic view of the hollow fiber fire extinguishing device of the new energy automobile battery in the embodiment of the utility model;

[0028] Fig. 3 is a partial structure schematic view of the hollow fiber fire extinguishing device of the new energy automobile battery in the embodiment of the utility model;

[0029] Mark explanation:

[0030] 10 - shell assembly, 100 - installation cavity, 101 - air inlet, 102 - air outlet, 103 - fire extinguishing agent output interface, 104 - pressure relief valve, 105 - shell main body, 106 - shell cover, 107 - ACC interface, 108 - ANL interface, 109 - communication interface, 20 - air inlet compression assembly, 200 - filter structure, 201 - air compression pump, 202 - input port, 203 - output port, 204 - filter shell, 205 - pulse dust removal filter element, 206 - containing cavity, 207 - filter inlet, 208 - filter outlet, 30 - nitrogen and oxygen separation assembly, 300 - installation shell, 301 - nitrogen and oxygen separation hollow fiber membrane, 302 - compressed gas inlet, 303 - nitrogen gas outlet, 304 - oxygen gas outlet, 40 - first pipeline, 41 - second pipeline, 42 - third pipeline, 43 - fourth pipeline, 44 - fifth pipeline, 50 - fixing piece, 60 - spare power supply assembly, 600 - power supply installation box, 601 - power supply battery, 602 - battery installation slot. DETAILED DESCRIPTION

[0031] In the following, only certain exemplary embodiments are simply described.As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the utility model.Therefore, the drawings and the description are considered to be essentially exemplary rather than limiting.

[0032] In the description of the embodiments of the utility model, it is understood that the orientation or positional relationship indicated by the terms "length", "vertical", "horizontal", "top", "bottom" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the utility model.

[0033] 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 one or more of that feature. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this embodiment of the 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 communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0035] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0037] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0038] Example:

[0039] like Figs. 1 to 3 As shown, this embodiment discloses a hollow fiber fire extinguishing device for new energy vehicle batteries, comprising:

[0040] The shell assembly 10 is provided with a mounting cavity 100, and the shell assembly 10 is provided with an air inlet 101, an air outlet 102 and a fire extinguishing agent output interface 103 in communication with the mounting cavity 100.

[0041] The air inlet compression assembly 20 is arranged in the mounting cavity 100 and connected with the air inlet 101 at one end, for filtering and compressing the external air;

[0042] The nitrogen-oxygen separation assembly 30 is arranged in the mounting cavity 100;

[0043] The nitrogen-oxygen separation assembly 30 includes a mounting shell 300 and a nitrogen-oxygen separation hollow fiber membrane 301, the mounting shell 300 is provided with a compressed gas inlet 302, a nitrogen gas outlet 303 and an oxygen gas outlet 304, the compressed gas inlet 302 is connected with the other end of the air inlet compression assembly 20, the oxygen gas outlet 304 is connected with the air outlet 102 through a first pipeline 40, the nitrogen gas outlet 303 is connected with the fire extinguishing agent output interface 103 through a second pipeline 41, the nitrogen-oxygen separation hollow fiber membrane 301 is arranged in the mounting shell 300, one end of the nitrogen-oxygen separation hollow fiber membrane 301 is connected with the compressed gas inlet 302, and the other end of the nitrogen-oxygen separation hollow fiber membrane 301 is connected with the nitrogen gas outlet 303, for separating oxygen in the compressed air and outputting purified nitrogen.

[0044] The new energy automobile battery hollow fiber fire extinguishing device in the utility model starts to work when the abnormal high temperature and other conditions that may cause heat runaway occur in the new energy automobile battery box.

[0045] Firstly, the air inlet compression assembly 20 inhales external air through the air inlet 101 on the shell assembly 10 and compresses the air, so that the air pressure is increased, thereby providing conditions for subsequent nitrogen-oxygen separation.

[0046] The compressed air is delivered to the compressed gas inlet 302 through the other end of the air inlet compression assembly 20 and enters the nitrogen-oxygen separation hollow fiber membrane 301 in the mounting shell 300 through the compressed gas inlet 302. Then the nitrogen-oxygen separation hollow fiber membrane 301 plays a key role, which has special selective permeability and can allow oxygen to diffuse through the membrane wall faster, while nitrogen is relatively blocked. Therefore, after the oxygen diffuses through the nitrogen-oxygen separation hollow fiber membrane 301, it is discharged out of the device through the oxygen gas outlet 304 and the first pipeline 40 from the air outlet 102; and the purified nitrogen is output from the nitrogen gas outlet 303 and the second pipeline 41 from the fire extinguishing agent output interface 103, directly injected into the battery box, rapidly reducing the oxygen concentration in the battery box and inhibiting the combustion reaction, thereby achieving the purpose of extinguishing fire.

[0047] The new energy automobile battery hollow fiber fire extinguishing device effectively solves the problems of large space occupation, discontinuous gas supply and slow response of the current nitrogen fire extinguishing equipment.

[0048] The nitrogen-oxygen separation hollow fiber membrane 301 is a polyimide composite membrane in the prior art, and the nitrogen-oxygen separation hollow fiber membrane 301 made of the polyimide composite membrane has a difference in solubility and diffusion coefficient of oxygen and nitrogen in the polyimide membrane during use, and the solubility and diffusion speed of oxygen are relatively fast, while the solubility and diffusion speed of nitrogen are relatively slow, so that the difference causes a concentration gradient to be formed on both sides of the nitrogen-oxygen separation hollow fiber membrane 301, so that oxygen is preferentially permeated through the membrane to realize separation from nitrogen.

[0049] As a further optimization, the gas outlet 102 can be externally connected to a pipeline.

[0050] As a further optimization, the nitrogen-oxygen separation hollow fiber membrane 301 is vertically arranged in the mounting shell 300, or is arranged in the mounting shell 300 in a Z-shaped folded manner, or is arranged in the mounting shell 300 in a spiral manner.

[0051] In order to facilitate filtering and compressing air, so as to facilitate subsequent separation and diffusion of oxygen through the nitrogen-oxygen separation hollow fiber membrane 301, the embodiment is improved on the basis of the above-mentioned embodiment, and the difference between the above-mentioned embodiment is that the air inlet compression assembly 20 comprises a filtering structure 200 and an air compression pump 201 connected in sequence, one end of the filtering structure 200 is connected with the air inlet 101, the other end is connected with the input port 202 of the air compression pump 201, and the output port 203 of the air compression pump 201 is connected with the compressed gas inlet 302 through the third pipeline 42.

[0052] The filtering structure 200 comprises a filtering shell 204 and a pulse dust removal filter core 205, the filtering shell 204 is internally provided with a containing cavity 206, the pulse dust removal filter core 205 is arranged in the containing cavity 206, is used for filtering particulate matters in air, one end of the filtering shell 204 is provided with a filtering inlet 207 in communication with the containing cavity 206, the other end is provided with a filtering outlet 208 in communication with the containing cavity 206, the filtering inlet 207 is connected with the air inlet 101, and the filtering outlet 208 is connected with the input port 202 of the air compression pump 201 through the fourth pipeline 43.

[0053] In use, air enters through the air inlet 101, then enters the containing cavity 206 through the filter inlet 207, then the particulate matter in the air is filtered through the pulse dust removal filter element 205, then the filtered air enters the air compressor pump 201 through the filter outlet 208 and the fourth pipeline 43 from the input port 202 of the air compressor pump 201, and then enters the compressed gas inlet 302 through the output port 203 of the air compressor pump 201 and the third pipeline 42.

[0054] The pulse dust removal filter element 205 can adopt ePTFE expanded polytetrafluoroethylene material with a filtering precision of 0.2 μm, which is used to filter particulate matter in the air and prevent particulate matter from blocking oxygen through the hollow fiber membrane 301 in the nitrogen-oxygen separation.

[0055] In order to facilitate the disassembly and assembly of the nitrogen-oxygen separation assembly 30, so as to facilitate the maintenance and replacement of the nitrogen-oxygen separation assembly 30, the embodiment is improved on the basis of the above-mentioned embodiment, and the difference from the above-mentioned embodiment is that the mounting shell 300 is detachably connected with the shell assembly 10 through a pair of fixing members 50, and the pair of fixing members 50 are respectively located at both ends of the mounting shell 300 and are detachably connected with the shell assembly 10.

[0056] The pair of fixing members 50 each include a fixing block, and the fixing block is detachably connected with the shell assembly 10 at both ends through bolts.

[0057] By arranging the pair of fixing members 50 and fixing the mounting shell 300 in the mounting cavity 100 of the shell assembly 10 through the cooperation of the bolts and the fixing members 50, the disassembly and assembly of the mounting shell 300 can be completed only by disassembling and assembling the bolts.

[0058] In order to prevent the device from being overloaded and failing due to blockage caused by long-term use, the embodiment is improved on the basis of the above-mentioned embodiment, and the difference from the above-mentioned embodiment is that the shell assembly 10 is provided with a pressure relief valve 104, and one end of the pressure relief valve 104 is connected with the second pipeline 41 through the fifth pipeline 44.

[0059] The pressure relief valve 104 can adopt an electromagnetic pressure relief valve 104 in the prior art which can realize the function of the utility model. The pressure relief valve 104 is a normally closed valve.

[0060] In order to facilitate the installation and protection of the air intake compression assembly 20 and the nitrogen-oxygen separation assembly 30, the embodiment is improved on the basis of the above-mentioned embodiment, and the difference from the above-mentioned embodiment is that the shell assembly 10 comprises a shell main body 105 and a shell cover 106, the installation cavity 100 is arranged in the shell main body 105 and penetrates the top of the shell main body 105, and the shell cover 106 is arranged on the top of the shell main body 105 and detachably connected with the shell main body 105 through bolts.

[0061] The detachable connection between the shell cover 106 and the shell main body 105 can facilitate the installation of the air intake compression assembly 20 and the nitrogen-oxygen separation assembly 30, and meanwhile, the arrangement of the shell cover 106 and the shell main body 105 can facilitate the anti-collision protection of the air intake compression assembly 20 and the nitrogen-oxygen separation assembly 30.

[0062] The shell main body 105 is provided with an ACC interface 107 electrically connected with the air compression pump 201, and the ACC interface 107 can be electrically connected with the new energy automobile battery and used for supplying power to the air compression pump 201.

[0063] By arranging the ACC interface 107 on the shell main body 105 and electrically connecting the ACC interface 107 with the air compression pump 201 in the air intake compression assembly 20, and meanwhile, electrically connecting the ACC interface 107 with the new energy automobile battery and used for supplying working power to the air compression pump 201, the new energy automobile battery hollow fiber fire extinguishing device can directly obtain vehicle power, thereby obtaining long-term and stable power supply, and effectively improving the adaptability and integration of the fire extinguishing device and the new energy automobile.

[0064] Since the battery on the vehicle may fail to supply power when the new energy automobile catches fire, in order to ensure the normal work of the new energy automobile battery hollow fiber fire extinguishing device when the power is cut off, the embodiment is improved on the basis of the above-mentioned embodiment, and the difference from the above-mentioned embodiment is that a backup power supply assembly 60 is arranged in the installation cavity 100, and the backup power supply assembly 60 is used for supplying power to the air compression pump 201 when the new energy automobile battery is cut off.

[0065] The backup power supply assembly 60 comprises a power supply mounting box 600 and a power supply battery 601, the power supply mounting box 600 is detachably connected with the shell assembly 10 through bolts, the power supply mounting box 600 is provided with a battery mounting groove 602, the power supply battery 601 is mounted in the battery mounting groove 602, and the power supply battery 601 is electrically connected with the air compression pump 201.

[0066] In use, the power supply battery 601 can supply power to the air compression pump 201 when the new energy automobile battery is cut off, thereby ensuring the normal work of the new energy automobile battery hollow fiber fire extinguishing device.

[0067] In order to facilitate the new energy automobile battery hollow fiber fire extinguishing device of the utility model can start automatically, the embodiment is improved on the basis of the above embodiment, which is different from the above embodiment, the shell main body 105 is further provided with ANL interface 108 and communication interface 109, wherein the ANL interface 108 is used for external large current DC fuse, the ANL interface 108 is connected with the power supply circuit of the vehicle battery, and the communication interface 109 adopts a standardized communication protocol and establishes real-time communication connection with the battery management system BMS of the vehicle machine.

[0068] When the external large current DC fuse is fused due to circuit overcurrent, the signal connection of the communication interface 109 and the battery management system BMS can trigger the battery management system BMS to start the fire extinguishing device, so as to intervene in the potential battery thermal runaway risk in advance and realize the circuit protection function of the battery pack or high-voltage system.

[0069] The utility model discloses a new energy automobile battery hollow fiber fire extinguishing device, which comprises a shell assembly 10, a nitrogen-oxygen separation hollow fiber membrane 301, a compressed gas inlet 302, an oxygen output port 304, a nitrogen output port 303, a first pipeline 40 and a second pipeline 41.

[0070] The utility model discloses a new energy automobile battery hollow fiber fire extinguishing device, which comprises a shell assembly 10, a nitrogen-oxygen separation hollow fiber membrane 301, a compressed gas inlet 302, an oxygen output port 304, a nitrogen output port 303, a first pipeline 40 and a second pipeline 41.

[0071] Although the preferred embodiments of the utility model have been described, those skilled in the art can make further changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to explain the preferred embodiments and all changes and modifications falling within the scope of the utility model.

[0072] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. It should be pointed out that any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A new energy vehicle battery hollow fiber fire extinguishing device, characterized in that, include: The housing assembly (10) has an installation cavity (100) inside, and the housing assembly (10) has an air inlet (101), an air outlet (102) and an extinguishing agent output interface (103) communicating with the installation cavity (100). An intake compression assembly (20) is disposed in the mounting cavity (100) and one end is connected to the air inlet (101) for drawing in outside air for filtration and compressing the air. A nitrogen-oxygen separation assembly (30) is disposed within the mounting cavity (100); The nitrogen-oxygen separation component (30) includes an installation housing (300) and a nitrogen-oxygen separation hollow fiber membrane (301). The installation housing (300) is provided with a compressed gas inlet (302), a nitrogen outlet (303) and an oxygen outlet (304). The compressed gas inlet (302) is connected to the other end of the air intake compression component (20). The oxygen outlet (304) is connected to the air outlet (102) through a first pipe (40). The nitrogen outlet (303) is connected to the fire extinguishing agent outlet (103) through a second pipe (41). The nitrogen-oxygen separation hollow fiber membrane (301) is installed inside the installation housing (300). One end of the nitrogen-oxygen separation hollow fiber membrane (301) is connected to the compressed gas inlet (302), and the other end is connected to the nitrogen outlet (303). It is used to separate oxygen from compressed air and output purified nitrogen.

2. The new energy vehicle battery hollow fiber fire extinguishing device according to claim 1, characterized in that, The intake compression assembly (20) includes a filter structure (200) and an air compressor pump (201) connected in sequence. One end of the filter structure (200) is connected to the air inlet (101), and the other end is connected to the input port (202) of the air compressor pump (201). The output port (203) of the air compressor pump (201) is connected to the compressed gas inlet (302) through a third pipe (42).

3. The new energy vehicle battery hollow fiber fire extinguishing device according to claim 2, characterized in that, The filter structure (200) includes a filter housing (204) and a pulse dust collector filter element (205). The filter housing (204) has a receiving cavity (206) inside. The pulse dust collector filter element (205) is installed in the receiving cavity (206) and is used to filter particulate matter in the air. One end of the filter housing (204) is provided with a filter inlet (207) communicating with the receiving cavity (206), and the other end is provided with a filter outlet (208) communicating with the receiving cavity (206). The filter inlet (207) is connected to the air inlet (101), and the filter outlet (208) is connected to the input port (202) of the air compressor pump (201) through a fourth pipe (43).

4. The new energy vehicle battery hollow fiber fire extinguishing device according to claim 1 or 3, characterized in that, The mounting housing (300) and the housing assembly (10) are detachably connected by a pair of fasteners (50), which are located at both ends of the mounting housing (300) and are detachably connected to the housing assembly (10).

5. The new energy vehicle battery hollow fiber fire extinguishing device according to claim 4, characterized in that, Each of the two fasteners (50) includes a fixing block, and the two ends of the fixing block are detachably connected to the housing assembly (10) by bolts.

6. The new energy vehicle battery hollow fiber fire extinguishing device according to claim 5, characterized in that, The housing assembly (10) is provided with a pressure relief valve (104), one end of which is connected to the second pipe (41) through the fifth pipe (44).

7. The new energy vehicle battery hollow fiber fire extinguishing device according to claim 6, characterized in that, The shell assembly (10) comprises a shell body (105) and a shell cover (106), a mounting cavity (100) is arranged in the shell body (105) and penetrates the top of the shell body (105), and the shell cover (106) is arranged on the top of the shell body (105) and detachably connected with the shell body (105) through bolts.

8. The new energy vehicle battery hollow fiber fire extinguishing device according to claim 7, characterized in that, An ACC interface (107) electrically connected with the air compression pump (201) is arranged on the shell body (105), the ACC interface (107) can be electrically connected with a new energy automobile battery and used for supplying power to the air compression pump (201).

9. The new energy vehicle battery hollow fiber fire extinguishing device according to claim 8, characterized in that, A backup power supply assembly (60) is arranged in the mounting cavity (100) and used for supplying power to the air compression pump (201) when the new energy automobile battery is powered off.

10. The new energy vehicle battery hollow fiber fire extinguishing device according to claim 9, characterized in that, The backup power supply assembly (60) comprises a power supply mounting box (600) and a power supply battery (601), the power supply mounting box (600) is detachably connected with the shell assembly (10) through bolts, a battery mounting groove (602) is arranged in the power supply mounting box (600), the power supply battery (601) is mounted in the battery mounting groove (602), and the power supply battery (601) is electrically connected with the air compression pump (201).

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