Fire detector and battery pack

Abstract

A fire detector and a battery pack. The fire detector comprises a mounting end cover (1), a fire sensing assembly (2), and a protective cover (3). The mounting end cover (1) is detachably provided outside a battery pack body (100). The fire sensing assembly (2) is located inside the battery pack body (100) and is detachably connected to the mounting end cover (1). The protective cover (3) is detachably connected to the side of the mounting end cover (1) provided with the fire sensing assembly (2), the protective cover (3) covers the fire sensing assembly (2), and the protective cover (3) is provided with detection holes (31). The interior of the battery pack body (100) is communicated with the interior of the protective cover (3) by means of the detection holes (31).

Description

Fire detectors and battery packs

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 7, 2023, with application number 202322430337.3. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of fire detection technology, for example, to a fire detector and a battery pack. Background Art

[0003] Fire detectors are devices used in fire alarm systems to detect and detect fires. Once a fire occurs, the fire detector can convert fire signals such as temperature, smoke, gas, and radiation light intensity into electrical signals, and immediately send an alarm signal to the fire alarm controller, reminding on-site personnel to quickly report the incident and evacuate in time to minimize losses and avoid disasters. Fire detectors can monitor the temperature, carbon monoxide, hydrogen, volatile organic compounds (VOCs) and other data of smoke in the environment with high accuracy. Through data analysis and processing algorithms, they can provide timely and effective early warning of abnormal situations and reduce the occurrence of false alarms. If necessary, the valve output can be driven to execute fire extinguishing, and communication with the electronic control unit (ECU) is maintained in normal working mode.

[0004] Fire detectors, with their mature technology, easy installation, and simplified maintenance, have become an effective means of responding to disasters in various residential, factory, and medical settings. Furthermore, fire detectors are widely used in batteries and other applications. Installing fire detectors within battery packs provides early warning and allows for the implementation of necessary prevention and control measures, effectively preventing accidents caused by thermal runaway. This is crucial for maintaining vehicle and personnel safety.

[0005] However, fire detectors in related technologies are typically installed inside a sealed battery pack. Subsequent maintenance and repairs require opening the sealed structure to replace the fire detector or its components, making the operation cumbersome and complex. A small number of externally mounted fire detectors, due to structural limitations, must separate the protective cover from the fire detector body, exposing the fire sensing component. This can easily be damaged during transportation, rendering the fire detector unusable and posing a significant safety hazard to the battery pack.

[0006] Summary of the Invention

[0007] The present application provides a fire detector and a battery pack. The fire detector is easy to maintain and replace, has a complete structure, and can improve the reliability of the fire detector.

[0008] The fire detector includes: a mounting end cover, which is configured to be detachably mounted on the outside of a battery pack body; a fire sensing assembly, which is configured to be located inside the battery pack body and detachably connected to the mounting end cover; and a protective cover, which is detachably connected to a side of the mounting end cover where the fire sensing assembly is disposed, the protective cover being disposed outside the fire sensing assembly, the protective cover being provided with a detection hole, the detection hole being configured to connect the interior of the battery pack body and the interior of the protective cover.

[0009] Optionally, the fire detector further includes an external connection component, which includes a wiring harness, a terminal being provided at the first end of the wiring harness, a wire entry hole being provided on the mounting end cover, the terminal being connected to the fire sensing component through the wire entry hole, and a second end of the wiring harness being configured to be connectable to an external circuit.

[0010] Optionally, the external connection component further includes a waterproof connector, which is provided on the wiring harness and located at the opening of the wire inlet hole, and a first seal is provided between the waterproof connector and the mounting end cover.

[0011] Optionally, the fire sensing component includes a first circuit board configured to analyze and process smoke data and a second circuit board configured to convert the smoke data. The first circuit board is provided with a socket, the terminal is matingly connected to the socket, and the second circuit board and the first circuit board are connected through a connector signal.

[0012] Optionally, the first circuit board is detachably disposed on the mounting end cover, and the second circuit board is detachably disposed on the first circuit board.

[0013] Optionally, the fire sensing component further includes a sensing maze, which is detachably arranged on the second circuit board, and a chip configured to sense fire is arranged inside the sensing maze.

[0014] Optionally, a first clamping member and a first mounting hole are provided on the induction maze, a first slot and a first connecting hole are provided on the second circuit board, the first clamping member is clamped in the first slot, the induction maze and the second circuit board are connected via a first connecting member, and the first connecting member passes through the first mounting hole and the first connecting hole in sequence.

[0015] Optionally, grooves are provided on the first circuit board and the second circuit board, anti-foolproof ribs are protruding from the mounting end cover, and the anti-foolproof ribs are snapped into the grooves; or, anti-foolproof ribs are provided on the first circuit board and the second circuit board, grooves are provided on the mounting end cover, and the anti-foolproof ribs are snapped into the grooves.

[0016] Optionally, a second clip is protruding from the mounting end cover, a second slot is provided on the protective cover, and the second clip is cooperated with the second slot to connect the protective cover to the mounting end cover; or, a second slot is provided on the mounting end cover, a second clip is protruding from the protective cover, and the second clip is cooperated with the second slot to connect the protective cover to the mounting end cover.

[0017] The present application also provides a battery pack, comprising a battery pack body and the above-mentioned fire detector, wherein a second mounting hole is opened on the battery pack body, the protective cover and the fire sensing component pass through the second mounting hole to be placed inside the battery pack body, the mounting end cover and the battery pack body are configured to be connected through a second connecting member, and a second seal is provided between the mounting end cover and the battery pack body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic structural diagram of a fire detector provided in an embodiment of the present application;

[0019] FIG2 is a schematic structural diagram of an installation end cover of a fire detector provided in an embodiment of the present application;

[0020] FIG3 is a schematic structural diagram of a protective cover of a fire detector provided in an embodiment of the present application;

[0021] FIG4 is a schematic structural diagram of a fire sensing assembly provided in an embodiment of the present application;

[0022] FIG5 is a cross-sectional view of the installation of the induction maze provided in an embodiment of the present application;

[0023] FIG6 is a cross-sectional view of a battery pack provided in an embodiment of the present application;

[0024] FIG7 is a schematic diagram of a terminal provided in an embodiment of the present application;

[0025] FIG8 is a schematic diagram of a first sealing member provided in an embodiment of the present application;

[0026] FIG9 is a schematic diagram of a first connecting member provided in an embodiment of the present application;

[0027] FIG10 is a schematic diagram of a second connecting member provided in an embodiment of the present application;

[0028] FIG11 is a schematic diagram of an induction maze provided in an embodiment of the present application;

[0029] FIG12 is a schematic diagram of a chip provided in an embodiment of the present application.

[0030] In the picture:

[0031] 100, battery pack body; 1001, second mounting hole; 1002, third connection hole;

[0032] 1. Install the end cap; 11. Wire inlet; 12. Anti-fouling rib; 13. Second clamping piece; 14. Stress groove; 15. Second connection hole;

[0033] 2. Fire sensor assembly; 21. First circuit board; 211. Socket; 22. Second circuit board; 221. First slot; 222. First connection hole; 23. Sensor maze; 231. First connector; 232. First mounting hole; 24. Groove;

[0034] 3. Protective cover; 31. Detection hole; 32. Second card slot;

[0035] 4. External connection components; 41. Wiring harness; 42. Waterproof connector;

[0036] 5. First connecting column; 6. Second sealing member; 7. Second connecting column;

[0037] 8. Terminal; 9. First sealing member; 10. First connecting member; 16. Second connecting member; 17. Chip. DETAILED DESCRIPTION

[0038] The present application is described below in conjunction with the accompanying drawings and embodiments. The specific embodiments described herein are merely intended to explain the present application and are not intended to limit the present application. For ease of description, the accompanying drawings only show portions relevant to the present application, not all structures.

[0039] The present application provides a fire detector that can detect the internal conditions of a battery pack and is installed externally, issuing an alarm in a timely manner to avoid disasters or minimize losses.

[0040] The fire detector is not only applicable to battery packs, but also to any enclosed structure that needs to monitor fire. In the following embodiments, for the convenience of description, the fire detector is installed on the outside of the battery pack as an example.

[0041] As shown in Figure 1, the fire detector includes a mounting end cap 1, a fire sensing assembly 2, and a protective cover 3. The mounting end cap 1 is mounted on the exterior of the battery pack body 100 and is removably connected to the battery pack body 100. The fire sensing assembly 2 is removably connected to the mounting end cap 1. The fire sensing assembly 2 is located inside the battery pack body 100 and is capable of sensing smoke inside the battery pack body 100, converting fire signals such as temperature, gas concentration, and radiant light intensity into electrical signals, and then issuing an external warning. By placing the mounting end cap 1 on the exterior of the battery pack body 100, the fire detector can be externally mounted. During maintenance, the fire detector can be directly replaced from the outside, which is not only convenient and quick, but also does not affect the internal structure of the battery pack body 100 during replacement and repair. The mounting end cap 1 is generally manufactured using an injection molding process. To prevent shrinkage during injection molding of the mounting end cap 1, as shown in Figure 2, a stress groove 14 is provided on the mounting end cap 1 to relieve stress and ensure the flatness of the mounting end cap 1. The number of stress grooves 14 can be set according to actual conditions.

[0042] A protective cover 3 is mounted on the side of the mounting end cap 1 where the fire sensor assembly 2 is located. To facilitate inspection and replacement, the protective cover 3 is removably connected to the mounting end cap 1. The protective cover 3 is positioned over the fire sensor assembly 2 and is provided with a detection hole 31, which connects the interior of the battery pack body 100 with the interior of the protective cover 3. Because the fire sensor assembly 2 is extremely sensitive, it is not only susceptible to environmental influences such as dust, but is also susceptible to bumps and knocks during transportation and installation, leading to malfunction or damage. Therefore, the protective cover 3 also protects the fire sensor assembly 2 and prevents external factors from affecting the operation of the fire detector.

[0043] To ensure timely contact between smoke and the fire sensing assembly 2, the aforementioned detection holes 31 are generally provided in a plurality, with the plurality of detection holes 31 being spaced apart. In some embodiments, the detection holes 31 can be provided as circular holes, in some embodiments, as grilles, and in still other embodiments, as shown in FIG1 , the protective cover 3 can be provided with both circular holes and grilles.

[0044] In order to achieve the installation of the protective cover 3 and the mounting end cover 1, as shown in Figures 2 and 3, a second clamping member 13 is protruded on the mounting end cover 1, and a second clamping slot 32 is provided on the protective cover 3. The second clamping member 13 cooperates with the second clamping slot 32 to connect the protective cover 3 to the mounting end cover 1. In some other embodiments, the second clamping slot 32 can also be provided on the mounting end cover 1, and the second clamping member 13 is provided on the protective cover 3. The connection between the protective cover 3 and the mounting end cover 1 is achieved by clamping the second clamping member 13 into the second clamping slot 32. There can be multiple second clamping slots 32 and second clamping members 13. The greater the number, the more stable the connection between the protective cover 3 and the mounting end cover 1.

[0045] To transmit information and issue warning signals to the outside world, the fire detector also includes an external connection assembly 4. As shown in Figures 1 and 7, external connection assembly 4 includes a wiring harness 41, which is configured to connect to an external circuit. A terminal 8 is provided at the first end of wiring harness 41, which is connected to the fire sensing assembly 2. The second end of wiring harness 41 is connected to an external circuit. In some embodiments, as shown in Figures 1 and 2, a wire entry hole 11 is provided on the mounting end cap 1, through which terminal 8 is connected to the fire sensing assembly 2.

[0046] In order to prevent the fire detector from being soaked in water and causing the fire detector to fail, the fire detector is also provided with waterproof measures. As shown in Figure 1, the above-mentioned external connection component 4 also includes a waterproof connector 42. The waterproof connector 42 is arranged on the wiring harness 41 and is located at the opening of the wire inlet 11. The waterproof connector 42 includes a wiring terminal and two adjustable waterproof parts threadedly connected to the wiring terminal. The adjustable waterproof parts are configured to be able to adjust the size of the opening at their own ports to isolate liquid from entering the interior of the wiring terminal. In some embodiments, the wire inlet 11 is a threaded hole, and the waterproof connector 42 can be threadedly connected to the wire inlet 11. The waterproof connector 42 is a common component well known in the mechanical field, so its specific structure will not be described in detail in this embodiment.

[0047] When a wiring harness 41 needs to be waterproofed, it is necessary to first disconnect the wiring harness 41 by cutting or other means. The disconnected wiring harness 41 forms two breaks, and a terminal is connected to each break. The two terminals can be plugged together to reconnect the wiring harness 41. Then, an adjustable waterproof component is passed through the wiring harness 41 and tightened to securely connect it to the side of the terminal away from the break. The opening size of the adjustable waterproof component is adjusted so that it is tightly wrapped around the outside of the wiring harness 41, thereby achieving the effect of waterproofing the wiring harness 41 at the wire inlet 11.

[0048] To further enhance the waterproofing of the cable entry hole 11 and prevent interference with the fire sensor assembly 2 on the other side of the mounting end cap 1, a first seal 9 is provided between the waterproof connector 42 and the mounting end cap 1. As shown in Figure 8, this first seal 9 ensures the fire detector's sealing performance during normal use. In some embodiments, the first seal 9 can be a sealing gasket. In other embodiments, the first seal 9 can also be a sealing pad, sealant, or the like. The type of first seal 9 can be selected based on requirements and usage conditions, as long as it achieves its sealing function.

[0049] During the operation of the fire detector, functions such as detecting fire, analyzing data, transmitting data, and issuing alarm signals are all achieved through the fire sensing assembly 2. As shown in Figure 4, the fire sensing assembly 2 includes a first circuit board 21 and a second circuit board 22. The first circuit board 21 is configured to analyze smoke data within the battery pack body 100, while the second circuit board 22 is configured to detect smoke data and convert the collected smoke data from the environment into data such as temperature, carbon monoxide concentration, and hydrogen concentration, so that the first circuit board 21 can analyze and process the data. The second circuit board 22 and the first circuit board 21 are connected via connector signals to achieve information transmission. The first circuit board 21 is provided with a socket 211, which mates with terminal 8 of the wiring harness 41 and can transmit signals that have undergone data analysis and processing algorithms to the outside world, providing timely and effective early warning of abnormal situations.

[0050] To facilitate maintenance, the first circuit board 21 is detachably mounted on the mounting end cap 1. A first connecting post 5 is protruding from the mounting end cap 1, and the first circuit board 21 and the first connecting post 5 are connected by screws. In some embodiments, the second circuit board 22 is detachably mounted on the first circuit board 21 in a stacked manner. This arrangement can convert a planar space into a three-dimensional space, saving floor space, avoiding the mounting end cap 1 from being too large, and also enabling the fire detector to be suitable for smaller battery packs. A second connecting post 7 is protruding from the first circuit board 21, and the second circuit board 22 and the second connecting post 7 are connected by screws; in some other embodiments, the second circuit board 22 is detachably mounted on the mounting end cap 1.

[0051] As shown in Figures 2 and 4, a groove 24 is provided on the first circuit board 21 and the second circuit board 22, and a foolproof rib 12 is provided on the mounting end cap 1. The foolproof rib 12 is snapped into the groove 24. The provision of the groove 24 and the foolproof rib 12 can improve the accuracy of installation and facilitate the automated production of fire detectors. In some other embodiments, foolproof holes can be provided on the first circuit board 21 and the second circuit board 22 to prevent installation errors. In some other embodiments, the positions of the foolproof rib 12 and the groove 24 can be reversed, that is, the foolproof rib 12 can be provided on the first circuit board 21 and the second circuit board 22, and the groove 24 can be provided on the mounting end cap 1, and the foolproof rib 12 can be snapped into the groove 24 to improve the accuracy of installation.

[0052] As shown in FIG5 , the fire sensing assembly 2 also includes a sensing labyrinth 23 configured to obtain fire information within the battery pack body 100. As shown in FIG11 and FIG12 , the sensing labyrinth 23 includes a base and an upper cover. The upper cover is provided with an opening, and a flap is provided at the opening to guide smoke in. The upper cover is snap-fitted onto the base, and a sensing compartment is formed between the upper cover and the base. A chip 17 configured to detect smoke is provided within the sensing compartment. In some embodiments, the sensing labyrinth 23 is detachably mounted on the mounting end cap 1. In other embodiments, to control the size of the fire detector from being too large, the sensing labyrinth 23 may also be provided on the second circuit board 22.

[0053] To ensure both stable installation and easy assembly and disassembly of the sensing maze 23, as shown in FIG5 , the sensing maze 23 is provided with a first clip 231 and a first mounting hole 232. The first mounting hole 232 and the first clip 231 are located on the base of the sensing maze 23. The second circuit board 22 is provided with a first slot 221 and a first connection hole 222. When installing the sensing maze 23, the first clip 231 is engaged with the first slot 221, securing one end of the base of the sensing maze 23. The first connector 10 is then passed through the first mounting hole 232 and the first connection hole 222 to connect the sensing maze 23 to the second circuit board 22, ensuring a stable connection between the sensing maze 23 and the second circuit board 22, as shown in FIG9 . In some embodiments, the first connector 10 can be a screw or bolt. This arrangement ensures a secure connection to the sensing maze 23 while also facilitating easy assembly and disassembly.

[0054] The number of the first clamping members 231 and the first mounting holes 232 can be multiple to further improve the installation stability of the sensing maze 23. In some other embodiments, multiple first clamping members 231 can be provided on the base of the sensing maze 23 to achieve installation, or multiple first mounting holes 232 can be provided on the base of the sensing maze 23 to achieve installation.

[0055] To facilitate maintenance and replacement, the first circuit board 21, the second circuit board 22 and the sensing maze 23 are generally detachable. However, in some embodiments, the first circuit board 21, the second circuit board 22 and the sensing maze 23 may also be integrally connected to other accessories.

[0056] The present application also provides a battery pack, as shown in Figures 1 and 6 . The battery pack includes the aforementioned fire detector and a battery pack body 100. A second mounting hole 1001 is provided in the battery pack body 100. The protective cover 3 and the fire sensing assembly 2 are inserted through the second mounting hole 1001 to be placed inside the battery pack body 100. A second connection hole 15 is provided in the mounting end cap 1, and a third connection hole 1002 is provided in the battery pack body 100. As shown in Figure 10 , a second connector 16 is inserted through the second connection hole 15 and the third connection hole 1002 in sequence to connect the mounting end cap 1 to the battery pack body 100. In some embodiments, the second connector 16 can be a screw or bolt. To ensure the secure connection between the fire detector and the battery pack body 100, multiple second connectors 16 are provided. To ensure the sealing of the interior of the battery pack body 100, a second seal 6 is provided between the mounting end cap 1 and the battery pack body 100. A third sealing member may be provided between the second connector 16 and the mounting end cap 1. In some embodiments, the second and third sealing members 6 and 16 may be formed of sealing washers. In other embodiments, the second and third sealing members 6 and 16 may be formed of sealing pads, sealants, etc. The types of the second and third sealing members 6 and 16 may be selected based on requirements and usage conditions, as long as they achieve a good sealing effect.

[0057] The fire detector provided in this application includes a mounting end cap, a fire sensing assembly, and a protective cover. The mounting end cap is detachably connected to the exterior of a battery pack body. The fire sensing assembly is located within the battery pack body and detachably connected to the mounting end cap. The protective cover is detachably connected to the side of the mounting end cap where the fire sensing assembly is located. The protective cover is located outside the fire sensing assembly and is provided with a detection hole. The interior of the battery pack body and the interior of the protective cover are connected through the detection hole. The fire detector can be disassembled and assembled from the outside, which not only facilitates replacement and maintenance of the fire detector and effectively improves work efficiency, but also eliminates the need to open the battery pack during maintenance and replacement, thereby preventing the internal structure of the battery pack from being affected. In addition, the provision of a protective cover outside the fire sensing assembly effectively ensures the safety and effectiveness of the fire detector.

[0058] The battery pack provided in this application is equipped with a fire detector that can constantly monitor and detect fire conditions within the battery pack and promptly issue an external warning when a fire occurs. The battery pack allows for external disassembly and installation of the fire detector, allowing for direct replacement of the fire detector from the outside during maintenance, which is not only convenient and quick, but also does not affect the internal structure of the battery pack.

[0059] In the description of this application, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0060] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0061] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

Claims

1. A fire detector, comprising: An installation end cover (1), wherein the installation end cover (1) is arranged to be detachably arranged outside the battery pack body (100); a fire sensing component (2), the fire sensing component (2) being arranged to be located inside the battery pack body (100) and detachably connected to the mounting end cover (1); A protective cover (3), the protective cover (3) being detachably connected to a side of the mounting end cover (1) on which the fire sensing component (2) is provided, the protective cover (3) being arranged outside the fire sensing component (2), the protective cover (3) being provided with a detection hole (31), the detection hole (31) being arranged to communicate with the interior of the battery pack body (100) and the interior of the protective cover (3).

2. The fire detector according to claim 1 further comprises an external connection component (4), the external connection component (4) comprises a wiring harness (41), a first end of the wiring harness (41) is provided with a terminal (8), a wire entry hole (11) is provided on the mounting end cover (1), the terminal (8) passes through the wire entry hole (11) to be connected to the fire sensing component (2), and a second end of the wiring harness (41) is configured to be connectable to an external circuit.

3. The fire detector according to claim 2, wherein: The external connection component (4) further comprises a waterproof connector (42), wherein the waterproof connector (42) is arranged on the wiring harness (41) and is located at the opening of the wire entry hole (11), and a first sealing member (9) is arranged between the waterproof connector (42) and the mounting end cover (1).

4. The fire detector according to claim 2, wherein: The fire sensing component (2) comprises a first circuit board (21) configured to analyze and process smoke data and a second circuit board (22) configured to transform the smoke data; the first circuit board (21) is provided with a socket (211); the terminal (8) is cooperatively connected to the socket (211); and the second circuit board (22) and the first circuit board (21) are connected via a connector signal.

5. The fire detector according to claim 4, wherein: The first circuit board (21) is detachably arranged on the mounting end cover (1), and the second circuit board (22) is detachably arranged on the first circuit board (21).

6. The fire detector according to claim 5, wherein: The fire sensing component (2) further comprises a sensing labyrinth (23), wherein the sensing labyrinth (23) is detachably arranged on the second circuit board (22), and a chip (17) configured to sense fire is arranged inside the sensing labyrinth (23).

7. The fire detector according to claim 6, wherein: The induction maze (23) is provided with a first clamping piece (231) and a first mounting hole (232); the second circuit board (22) is provided with a first clamping slot (221) and a first connecting hole (222); the first clamping piece (231) is clamped in the first clamping slot (221); the induction maze (23) and the second circuit board (22) are connected via a first connecting piece (10); the first connecting piece (10) passes through the first mounting hole (232) and the first connecting hole (222) in sequence.

8. The fire detector according to claim 5, wherein: A groove (24) is provided on the first circuit board (21) and the second circuit board (22), and an anti-fool rib (12) is protruded on the mounting end cover (1), and the anti-fool rib (12) is snapped into the groove (24); or, Anti-foolproof ribs (12) are provided on the first circuit board (21) and the second circuit board (22), and a groove (24) is provided on the mounting end cover (1), and the anti-foolproof ribs (12) are snap-fitted into the groove (24).

9. The fire detector according to claim 1, wherein: A second clamping member (13) is protruding from the mounting end cover (1), a second clamping slot (32) is formed on the protective cover (3), and the second clamping member (13) is matched and connected with the second clamping slot (32) to realize the connection between the protective cover (3) and the mounting end cover (1); or, The mounting end cover (1) is provided with a second clamping groove (32), and the protective cover (3) is provided with a second clamping piece (13) protruding therefrom. The second clamping piece (13) is matched and connected with the second clamping groove (32) to realize the connection between the protective cover (3) and the mounting end cover (1).

10. A battery pack, comprising a battery pack body (100) and a fire detector according to any one of claims 1 to 9, wherein a second mounting hole (1001) is provided on the battery pack body (100), the protective cover (3) and the fire sensing component (2) pass through the second mounting hole (1001) to be placed inside the battery pack body (100), the mounting end cover (1) and the battery pack body (100) are arranged to be connected via a second connecting member (16), and a second sealing member (6) is provided between the mounting end cover (1) and the battery pack body (100).

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