Power supply device and gas detector

Abstract

The utility model provides a power supply device and a fuel gas detector, relates to the technical field of gas detection, and aims to solve the problems of relatively low mounting stability and reliability of a battery pack in related technologies. The power supply device comprises a first shell and a battery pack, the first shell comprises an upper cover and a cover plate which are buckled with each other, the upper cover and the cover plate jointly define a containing cavity, and the battery pack is installed in the containing cavity of the battery pack; the upper cover is connected with the cover plate, a buffer part is arranged between the battery pack and at least part of the inner wall surface of the first shell, and the upper cover, the cover plate and the buffer part jointly clamp the battery pack to form a clamping state of the battery pack. The battery pack can be mounted, the mounting stability and reliability of the battery pack can be improved, the problem of liquid leakage of the battery pack can be avoided, and the service life of the battery pack is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of gas detection, and in particular to a power supply device and a gas detector. Background Art

[0002] Methane detectors are generally used in gas wells to detect whether there is a methane gas leak. If there is a methane gas leak in the well, the methane detector draws in gas, and the detector in the methane detector will detect the methane concentration, so that the controller will send out an alarm signal.

[0003] In order to ensure the normal operation of the methane detector and the controller, in the related art, the methane detector and the controller are generally powered by a battery pack. However, the installation stability and reliability of the battery pack in the related art are low. Utility Model Content

[0004] In order to solve the problems mentioned in the background technology, the present application provides a power supply device and a gas detector, which can realize the installation of a battery pack, improve the installation stability and reliability of the battery pack, help avoid the problem of battery pack leakage, and extend the service life of the battery pack.

[0005] In order to achieve the above-mentioned purpose, a first aspect of an embodiment of the present application provides a power supply device for a gas detector, wherein the power supply device includes a first shell and a battery pack, wherein the first shell includes an upper cover and a cover plate that are interlocked with each other, wherein the upper cover and the cover plate together form an accommodating cavity, and the battery pack is installed in the accommodating cavity of the battery pack; the upper cover and the cover plate are connected, and a buffer is provided between the battery pack and at least part of the inner wall surface of the first shell, and the upper cover, the cover plate and the buffer together clamp the battery pack to form a clamped state of the battery pack.

[0006] As for the power supply device as described above, optionally, the upper cover includes a first opening, and an annular mounting liner is arranged in the first shell, the mounting liner is close to one side of the first opening and is recessed in the first opening, the cover plate is connected to the mounting liner, and the mounting liner surrounds the accommodating cavity.

[0007] As for the power supply device as described above, optionally, the installation inner shell has a second opening connected to the accommodating cavity, and the first opening is opposite to the second opening; the battery pack is installed in the accommodating cavity through the second opening; and the cover plate is covered and connected to the second opening of the installation inner shell.

[0008] As for the power supply device as described above, optionally, the upper cover and the cover plate are connected by screw columns; and / or, a plurality of arc-shaped grooves are opened on the circumference of the cover plate, and the arc-shaped grooves are used for the wires to pass through.

[0009] For the power supply device as described above, optionally, a first sealant is filled on a side of the cover plate facing away from the mounting liner, and the first sealant blocks the first opening; and / or a second sealant is filled at a connection gap between the cover plate and the mounting liner.

[0010] As for the power supply device as described above, optionally, the buffer member includes a first buffer member, which is arranged on the side of the battery pack away from the first opening; and / or, the buffer member includes a second buffer member, which is arranged between the end surface of the battery pack close to the first opening and the end surface away from the first opening, and the second buffer member is a ring-shaped member, which surrounds the circumference of the battery pack; and / or, the buffer member includes a third buffer member, which is arranged on the side of the battery pack close to the first opening.

[0011] As for the power supply device as described above, optionally, a protruding portion protruding outward is provided on the top of the first shell, and a support member is provided on a side of the protruding portion close to the accommodating cavity, and the support member presses the battery pack.

[0012] As for the power supply device as described above, optionally, an operating member is provided on the first shell; and / or an insulating member is provided outside the first shell.

[0013] A second aspect of an embodiment of the present application provides a gas detector, comprising a detection device, a control device and a power supply device, wherein the detection device and the control device are both electrically connected to the power supply device, and the power supply device is configured to supply power to the detection device and the control device.

[0014] As described above, the gas detector may optionally include a second shell, wherein the detection device and the control device are both arranged in the cavity of the second shell, and the second shell is connected to the first shell of the power supply device; an isolating member is provided at the connection point between the first shell and the second shell, and a lead hole is provided on the isolating member; or a heat insulating member is provided at the connection point between the first shell and the second shell.

[0015] The power supply device and gas detector provided in the embodiments of the present application, the power supply device includes a first shell and a battery pack, the first shell includes an upper cover and a cover plate that are interlocked, and the battery pack is installed in the accommodating cavity of the battery pack; the upper cover and the cover plate are connected, and a buffer is provided between the battery pack and at least part of the inner wall surface of the first shell. In this way, the first shell can play a role in installing and fixing the battery pack, improve the installation stability and reliability of the battery pack, help avoid the problem of battery pack leakage, and extend the service life of the battery pack. The buffer has a certain elasticity and softness, which can absorb impact and vibration from the outside, thereby reducing the stress and vibration inside the battery pack and improving the protection effect of the battery pack.

[0016] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the power supply device and gas detector provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of a gas detector provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the structure of a power supply device provided in an embodiment of the present application;

[0020] Figure 3 A cross-sectional view of a power supply device provided in an embodiment of the present application.

[0021] Description of reference numerals:

[0022] 100-power supply device;

[0023] 110-first housing; 111-upper cover; 1111-first opening;

[0024] 112-cover plate; 113-accommodating cavity; 114-protruding portion;

[0025] 115-supporting member; 116-arc groove;

[0026] 120-battery pack; 130-buffer; 140-install liner;

[0027] 141 - second opening; 150 - fastener; 160 - operating member;

[0028] 200-gas detector; 210-detection device; 220-control device;

[0029] 230 - second shell; 231 - cavity. DETAILED DESCRIPTION

[0030] Methane detectors are generally used in gas wells to detect whether there is a methane gas leak. The detection principle of methane detectors is: methane detectors use pump suction technology to measure the concentration of methane gas. The methane detector contains a pump and a sensor. The function of the pump is to suck the ambient air into the detector through the pump suction method. Then the sensor measures the methane gas concentration in the sucked air and converts the result into an electrical signal output. If the methane concentration is detected, the controller sends an alarm signal. In order to ensure the normal operation of the methane detector and the controller, in the related art, the methane detector and the controller are generally powered by a battery pack. However, the sealing performance of the battery pack in the related art is poor.

[0031] Based on the above technical problems, the present application provides a power supply device and a gas detector, wherein the power supply device includes a first shell and a battery pack, wherein the first shell includes an upper cover and a cover plate that are interlocked, and the battery pack is installed in the accommodating cavity of the battery pack; the upper cover and the cover plate are connected, and a buffer is provided between the battery pack and at least part of the inner wall surface of the first shell. In this way, the first shell can play a role in installing and fixing the battery pack, improve the installation stability and reliability of the battery pack, help avoid the problem of battery pack leakage, and extend the service life of the battery pack. The buffer has a certain elasticity and softness, and can absorb shocks and vibrations from the outside, thereby reducing the stress and vibration inside the battery pack and improving the protection effect on the battery pack.

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] Figure 1 A schematic diagram of the structure of a gas detector provided in an embodiment of the present application.

[0034] Reference Figure 1As shown, an embodiment of the present application provides a gas detector 200, which may include a detection device 210, a control device 220 and a power supply device 100. The detection device 210 and the control device 220 are both electrically connected to the power supply device 100, and the power supply device 100 is configured to supply power to the detection device 210 and the control device 220.

[0035] The type of the power supply device 100 is not limited. For example, the power supply device 100 may be a battery pack 120, or a storage battery, etc. In this embodiment, the battery pack 120 is mainly used as the power supply device 100 as an example for description. The type of the control device 220 is also not limited.

[0036] The gas detector 200 can be used to detect whether methane gas is leaking, or the gas detector 200 can be used to detect whether gas is leaking, which is not limited in this embodiment. The type of the detection device 210 is not limited. In this embodiment, the methane detector is mainly used as the above detection device 210 as an example for explanation. The methane detector is mainly used for combustible gas detection in underground well chambers, specifically, for detecting methane gas in underground well chambers.

[0037] There is no limitation on the electrical connection between the detection device 210 and the power supply device 100, and the control device 220 and the power supply device 100. For example, the detection device 210 and the power supply device 100, and the control device 220 and the power supply device 100 may be electrically connected in a wired manner such as a wire, or the detection device 210 and the power supply device 100, and the control device 220 and the power supply device 100 may be electrically connected in a wireless manner, which is not limited in this embodiment.

[0038] When assembling, refer to Figure 1 As shown, the gas detector 200 may include a second shell 230, the detection device 210 and the control device 220 are both arranged in the cavity 231 of the second shell 230, and the second shell 230 is connected to the first shell 110 of the power supply device 100. Exemplarily, the second shell 230 and the first shell 110 may be connected by means of snaps, screws, etc.; or, the second shell 230 and the first shell 110 may be connected by bonding. This embodiment is not limited to this.

[0039] In some embodiments, an isolator may be provided at the joint of the first shell 110 and the second shell 230. On the one hand, the isolator can isolate the battery pack 120 from the control device 220 and the detection device 210, thereby helping to avoid the risk of damage to the control device 220 and the detection device 210 caused by leakage of the battery pack 120. On the other hand, the isolator can keep the circuits of the battery pack 120 located above and the control device 220 and the detection device 210 located below independent, which is beneficial to improve the anti-interference ability and make the gas detector 200 have higher installation performance and reliability.

[0040] In some embodiments, a lead hole may be provided on the isolation member, so that if the power supply device 100 and the control device 220 or the detection device 210 are connected via a wire, the wire may be led to the control device 220 or the detection device 210 via the lead hole, thereby realizing electrical connection between the power supply device 100 and the control device 220, and between the power supply device 100 and the control device 220, thereby realizing power supply to the control device 220 and the detection device 210 by the power supply device 100.

[0041] In some embodiments, a heat insulating member may be provided at the joint between the first shell 110 and the second shell 230. The heat insulating member may be used to provide heat insulation protection for the battery pack 120, and can effectively isolate the battery pack 120 from other components to prevent damage and accidents caused by excessive temperature.

[0042] Figure 2 A schematic diagram of the structure of a power supply device provided in an embodiment of the present application, Figure 3 A cross-sectional view of a power supply device provided in an embodiment of the present application.

[0043] Reference Figure 2 and Figure 3 As shown, the power supply device 100 may include a first shell 110 and a battery pack 120, wherein the first shell 110 includes an upper cover 111 and a cover plate 112 that are buckled together, the upper cover 111 and the cover plate 112 together form a receiving cavity 113, and the battery pack 120 is installed in the receiving cavity 113 of the battery pack 120. In this way, by providing the receiving cavity 113, the battery pack 120 is located in the receiving cavity 113, and the receiving cavity 113 can protect and seal the battery pack 120, thereby ensuring that the battery pack 120 is not damaged.

[0044] In some embodiments, the upper cover 111 and the cover plate 112 may be connected by screw columns, wherein the number of screw columns is not limited. Exemplarily, the screw columns may include two, three or more. In this embodiment, three screw columns are mainly used as an example for explanation. In this way, the assembly stability of the upper cover 111 and the cover plate 112 can be improved, thereby ensuring the installation stability of the battery pack 120.

[0045] In some embodiments, reference Figure 2 As shown, the outer periphery of the cover plate 112 may be provided with a plurality of arc-shaped grooves 116 for the wires to pass through. For example, the number of the arc-shaped grooves 116 may be two, three or more. In this embodiment, three arc-shaped grooves 116 are mainly used as an example for explanation.

[0046] By providing the arc groove 116, on the one hand, the arc groove 116 can be used for wiring. For example, the wires of the battery pack 120 are connected to the control device 220 via the arc groove 116. On the other hand, providing the arc groove 116 can also reduce the weight of the cover plate 112, which is beneficial to the lightweight of the device.

[0047] In some embodiments, reference Figure 2 As shown, a buffer member 130 may be disposed between the battery pack 120 and at least a portion of the inner wall surface of the first shell 110 , wherein the buffer member 130 is not limited in its location, number, and shape and may be disposed according to actual needs.

[0048] Exemplarily, the buffer 130 may be a foam pad or a foam board. Since the buffer 130 has certain elasticity and softness, it can absorb external impact and vibration, thereby reducing stress and vibration inside the battery pack 120 and improving the protection effect of the battery pack 120.

[0049] In some embodiments, the first shell 110 can be made of a pressure-resistant, impact-resistant, and corrosion-resistant insulating material to protect the battery pack 120 from the external environment. The material of the first shell 110 should have good insulating properties to ensure the electrical safety of the battery pack 120.

[0050] Therefore, in this embodiment, by including the first shell 110, the battery pack 120 can be installed and fixed. In addition, the upper cover 111, the cover plate 112 and the buffer member 130 clamp the battery pack 120 together to form a clamping state for the battery pack 120, thereby achieving the installation of the battery pack 120, and can improve the installation stability and reliability of the battery pack 120, help avoid the problem of leakage of the battery pack 120, and extend the service life of the battery pack 120.

[0051] In one possible implementation, referring to Figure 3 As shown, the upper cover 111 may include a first opening 1111, and an installation liner 140 may be provided in the first shell 110. The installation liner 140 is close to one side of the first opening 1111 and is recessed in the first opening 1111. The cover plate 112 is connected to the installation liner 140, and the installation liner 140 is surrounded by a accommodating cavity 113.

[0052] The installation form of the inner liner 140 is not limited. For example, the inner liner 140 can be an annular protrusion 114, and the protrusion 114 can be integrally formed and connected to the inner wall surface of the first shell 110, or the protrusion 114 can be connected to the first shell 110 by bonding, threading, etc. This is not limited in this embodiment.

[0053] By setting the installation liner 140 to be recessed in the first opening 1111 and the cover plate 112 to be connected to the installation liner 140, the cover plate 112 is recessed in the first opening 1111, which helps to further confine the battery pack 120 in the accommodating cavity 113 to avoid the battery pack 120 being exposed to the outside. In addition, the installation liner 140 can also play a connecting role, so that the connection between the cover plate 112 and the upper cover 111 is achieved by installing the liner 140, and the assembly method is firm.

[0054] In one possible implementation, referring to Figure 3 As shown, the installation liner 140 may have a second opening 141 communicating with the accommodating cavity 113, and the first opening 1111 is opposite to the second opening 141. During assembly, the battery pack 120 is installed in the accommodating cavity 113 through the second opening 141, and the cover plate 112 covers and connects to the second opening 141 of the installation liner 140. There is no limitation on the size range of the first opening 1111 and the second opening 141, and they can be set according to actual needs.

[0055] In one achievable manner, in order to achieve the connection between the installation liner 140 and the cover plate 112, in this embodiment, the mouth of the second opening 141 of the installation liner 140 can be provided with a plurality of first mounting holes, and the plurality of first mounting holes are arranged at intervals along the circumference of the installation liner 140, and the cover plate 112 can be provided with a plurality of second mounting holes, and the plurality of second mounting holes are arranged one-to-one with the plurality of first mounting holes. During assembly, the fastener 150 penetrates the first mounting hole and the corresponding second mounting hole to connect the installation liner 140 and the cover plate 112. Exemplarily, the fastener 150 can be a screw.

[0056] There is no limitation on the number, diameter, arrangement, etc. of the first mounting holes and the second mounting holes, and they can be set according to actual needs.

[0057] In one achievable manner, in order to further improve the sealing effect of the battery pack 120, in some embodiments, the side of the cover plate 112 facing away from the mounting liner 140 may be filled with a first sealant, and the first sealant blocks the first opening 1111. In some embodiments, the connection gap between the cover plate 112 and the mounting liner 140 may be filled with a second sealant.

[0058] For example, the first seal and the second seal may be sealant; or, the first seal and the second seal may be sealing rings; or, the first seal and the second seal may be sealing gaskets, which are not limited in this embodiment.

[0059] In one achievable manner, in order to further improve the protection effect on the battery pack 120, in some embodiments, the buffer 130 may include a first buffer, and the first buffer is disposed on the side of the battery pack 120 away from the first opening 1111. In this way, the battery pack 120 can be protected from the side of the battery pack 120 away from the first opening 1111.

[0060] In some embodiments, the buffer 130 may include a second buffer, which is disposed between the end surface of the battery pack 120 close to the first opening 1111 and the end surface away from the first opening 1111. In this embodiment, the second buffer is a ring-mounted component, which surrounds the circumference of the battery pack 120. In this way, the battery pack 120 can be protected from the circumference of the battery pack 120.

[0061] In some embodiments, the buffer 130 may include a third buffer, and the third buffer is disposed on a side of the battery pack 120 close to the first opening 1111. In this way, the battery pack 120 can be protected from the side of the battery pack 120 close to the first opening 1111.

[0062] It should be noted that the setting position of the buffer member 130 includes but is not limited to the above-mentioned multiple ways, and can be set according to actual conditions.

[0063] In one possible implementation, referring to Figure 1 and Figure 3 As shown, a protrusion 114 protruding outward may be provided on the top of the first shell 110, and a support member 115 may be provided on one side of the protrusion 114 close to the accommodating cavity 113, so that the support member 115 can press the battery pack 120 from the top of the battery pack 120.

[0064] Exemplarily, the support member 115 can be a plurality of support columns, which are spaced apart and connected to the inner side of the protrusion 114. Compared with a planar structure, the structure of the support member 115 can improve the compression effect on the battery pack 120, and the fixing effect of the battery pack 120 is higher, thereby further improving the installation stability and reliability of the battery pack 120.

[0065] In one possible implementation, referring to Figure 2 and Figure 3As shown, the first housing 110 may be provided with an operating member 160, and the operating member 160 may be, for example, a hanging ring; or, the operating member 160 may be a handle, so that the operator can directly take it through the operating member 160, which is convenient. In some embodiments, the operating member 160 may be installed on the top of the first housing 110, so as to facilitate operations such as transportation, handling, and installation.

[0066] In one possible implementation, an insulating member may be provided on the outside of the first shell 110, which helps to insulate and protect the battery pack 120 and prevent it from short-circuiting. Exemplarily, the insulating member may be made of insulating materials such as polypropylene and polyvinyl chloride, which have good insulation properties and high temperature resistance, and prevent short circuits and leakage. Polypropylene also has good chemical corrosion resistance, and can resist acid and alkali corrosion inside the battery pack 120, maintaining the stability and service life of the battery pack 120.

[0067] The power supply device and gas detector provided in this embodiment, the power supply device includes a first shell and a battery pack, the first shell includes an upper cover and a cover plate that are interlocked, and the battery pack is installed in the accommodating cavity of the battery pack; the upper cover and the cover plate are sealed and connected, and a buffer is provided between the battery pack and at least part of the inner wall surface of the first shell. In this way, the first shell can play a role in installing and fixing the battery pack, improve the sealing and reliability of the battery pack, and extend the service life of the battery pack. The buffer has a certain elasticity and softness, and can absorb impacts and vibrations from the outside, thereby reducing the stress and vibration inside the battery pack and improving the protection effect of the battery pack.

[0068] In the description of the present application, it should be understood that the terms used, such as "center", "length", "width", "thickness", "top", "bottom", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "axial", and "circumferential", indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the position or component referred to must have a specific orientation, a specific structure and operation, and therefore should not be understood as a limitation on the present application.

[0069] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0070] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, so that the internal connection of two elements or the interaction relationship between two elements can be achieved. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0071] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A power supply device for a gas detector, characterized in that: The power supply device includes a first shell and a battery pack, the first shell includes an upper cover and a cover plate that are buckled together, the upper cover and the cover plate together form a receiving cavity, and the battery pack is installed in the receiving cavity of the battery pack; The upper cover is connected to the cover plate, a buffer is provided between the battery pack and at least a portion of the inner wall surface of the first shell, and the upper cover, the cover plate and the buffer clamp the battery pack together to form a clamped state of the battery pack.

2. The power supply device according to claim 1, characterized in that: The upper cover includes a first opening, and an annular installation liner is arranged in the first shell. The installation liner is close to one side of the first opening and is recessed in the first opening. The cover plate is connected to the installation liner, and the installation liner surrounds the accommodating cavity.

3. The power supply device according to claim 2, characterized in that: The installation liner has a second opening connected to the accommodating cavity, and the first opening is opposite to the second opening; the battery pack is installed in the accommodating cavity through the second opening; and the cover plate is covered and connected to the second opening of the installation liner.

4. The power supply device according to claim 1, characterized in that: The upper cover and the cover plate are connected via screw columns; and / or, a plurality of arc-shaped grooves are provided on the circumference of the cover plate, and the arc-shaped grooves are used for the wires to pass through.

5. The power supply device according to claim 2 or 3, characterized in that: A first sealant is filled on a side of the cover plate facing away from the installation liner, and the first sealant blocks the first opening; and / or a second sealant is filled at a connection gap between the cover plate and the installation liner.

6. The power supply device according to claim 5, characterized in that: The buffer member includes a first buffer member, and the first buffer member is arranged on a side of the battery pack away from the first opening; And / or, the buffer member includes a second buffer member, the second buffer member is disposed between an end surface of the battery pack close to the first opening and an end surface away from the first opening, the second buffer member is an annular member, and the second buffer member surrounds the circumference of the battery pack; And / or, the buffer member includes a third buffer member, and the third buffer member is arranged on a side of the battery pack close to the first opening.

7. The power supply device according to any one of claims 1 to 3, characterized in that: A protruding portion protruding outward is disposed on the top of the first shell, and a supporting member is disposed on a side of the protruding portion close to the accommodating cavity, and the supporting member presses the battery pack.

8. The power supply device according to any one of claims 1 to 3, characterized in that: An operating member is disposed on the first shell; and / or an insulating member is disposed outside the first shell.

9. A gas detector, comprising a detection device, a control device and a power supply device according to any one of claims 1 to 8, wherein the detection device and the control device are both electrically connected to the power supply device, and the power supply device is configured to supply power to the detection device and the control device.

10. The gas detector according to claim 9, characterized in that: The gas detector comprises a second shell, the detection device and the control device are both arranged in the cavity of the second shell, and the second shell is butted with the first shell of the power supply device; An isolating piece is provided at the joint between the first shell and the second shell, and a lead hole is provided on the isolating piece; or a heat insulating piece is provided at the joint between the first shell and the second shell.

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