High-voltage box structure

Abstract

The utility model discloses a high-voltage box structure, and the structure comprises a box body which comprises an inner side wall surface and an outer side wall surface. The mounting bracket is arranged on the inner side wall surface; at least part of the component group is detachably mounted on the mounting bracket; and the plurality of wiring terminals are arranged on the outer side wall surface, and the wiring terminals are arranged at intervals along the circumferential direction of the outer side wall surface. According to the high-voltage box, the problem that the service life of the high-voltage box is relatively short due to the fact that components in the high-voltage box are compactly arranged and the heat dissipation efficiency is low in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the technical field of electric power equipment, and in particular to a high-voltage box structure. Background Art

[0002] The high-voltage box is an important component of the battery energy storage system. It can not only control the charging and discharging of the battery system and the overvoltage and overcurrent protection, and play a role in ensuring the power transmission of the energy storage system, but also detect insulation faults, circuit faults, grounding faults and high-voltage faults of the entire high-voltage system at any time.

[0003] At present, multiple components and BMS (battery management system) are usually integrated inside the high-voltage box. The BMS is placed horizontally, occupying the installation space at the bottom of the box. The components are arranged compactly, resulting in low utilization of the internal space of the box and complex circuit distribution, which affects the heat dissipation of electrical components and reduces the service life of the high-voltage box. Utility Model Content

[0004] The main purpose of the present application is to provide a high-voltage box structure to solve the problem of a short service life of the high-voltage box caused by compact arrangement of components inside the high-voltage box and low heat dissipation efficiency in the prior art.

[0005] According to one aspect of the present application, a high-voltage box structure is provided, comprising: a box body, the box body comprising an inner wall and an outer wall; a mounting bracket, arranged on the inner wall; a component group, at least part of the component group is detachably mounted on the mounting bracket; a plurality of wiring terminals, arranged on the outer wall, each wiring terminal being arranged at intervals along the circumferential direction of the outer wall.

[0006] Furthermore, the plurality of terminals include a first group of terminals and a second group of terminals; the outer wall surface includes: a first outer wall surface and a second outer wall surface connected to each other, the first group of terminals are arranged on the first outer wall surface, and the second group of terminals are arranged on the second outer wall surface.

[0007] Furthermore, a mounting groove is arranged on the outer wall surface, and the mounting groove is recessed relative to the outer wall surface toward the middle of the box body; some of the plurality of wiring terminals are arranged on the bottom surface of the mounting groove.

[0008] Furthermore, the component group includes a terminal row, and the mounting bracket includes: a first support frame, which is arranged on the inner wall surface, and the middle part of the first support frame protrudes in a direction away from the inner wall surface, and the terminal row is arranged on the first support frame.

[0009] Furthermore, the first support frame includes: a first body, a second body and a third body connected in sequence, the first body and the third body are respectively connected to the inner wall surface, and the second body is opposite to the inner wall surface and arranged at intervals; at least part of the terminal row is arranged on the second body.

[0010] Furthermore, the component group includes a fuse, and the mounting bracket includes: a second support frame, which is arranged on the inner wall surface, the second support frame includes a fixed body and a supporting body connected to each other, the fixed body is connected to the inner wall surface, and a supporting sheet metal is arranged on the supporting body, the supporting sheet metal is opposite to the inner wall surface to form an avoidance space between the supporting sheet metal and the inner wall surface, and at least a part of the fuse is arranged in the avoidance space and connected to the supporting sheet metal.

[0011] Furthermore, the inner wall surface includes a first inner wall surface and a second inner wall surface that are connected to each other, the first inner wall surface extends along the length direction of the box body, and the mounting bracket is arranged on the first inner wall surface; the high-voltage box structure also includes: a battery management module, which is arranged on the second inner wall surface, and the outlet of the battery management module is opposite to the top wall surface of the box body.

[0012] Furthermore, the high-voltage box structure also includes: a limiting bracket, on which a limiting space for limiting the wire is provided; there are multiple limiting brackets, and the multiple limiting brackets are arranged at intervals on the inner wall surface.

[0013] Furthermore, the limiting bracket includes: a fixing plate, which is arranged on the inner wall surface; a limiting body, which is arranged on the fixing plate, and the middle part of the limiting body protrudes in a direction away from the fixing plate, and the limiting space is arranged between the limiting body and the fixing plate.

[0014] Furthermore, the box body includes: a bottom shell, in which each component group is arranged; a cover plate, which is covered on the bottom shell, and the cover plate includes a cover plate body and a connecting body that are connected to each other, the connecting body extends along the circumferential direction of the cover plate body, the cover plate body protrudes in a direction away from the bottom shell relative to the connecting body, and the connecting body is connected to the bottom shell; a sealing component is arranged between the bottom shell and the cover plate.

[0015] Compared with the prior art, the technical solution of this application has at least the following technical effects:

[0016] According to the high-voltage box structure provided by the present application, it includes a box body, a mounting bracket, a component group and a plurality of wiring terminals, the box body includes an inner wall surface and an outer wall surface; the mounting bracket is arranged on the inner wall surface; at least part of the component group is detachably mounted on the mounting bracket; a plurality of wiring terminals are arranged on the outer wall surface, and each wiring terminal is arranged at intervals along the circumferential direction of the outer wall surface. Among them, by arranging the mounting bracket on the inner wall surface of the box body, at least part of the component group is detachably mounted on the mounting bracket, the installation space of the inner wall surface of the box body can be reasonably utilized, and the problem that each component in the component group is concentrated in the bottom surface installation area of ​​the box body, thereby causing the components to be arranged compactly, which is not conducive to heat dissipation, etc. In addition, each wiring terminal is arranged at intervals along the circumferential direction of the outer wall surface, so that each wiring terminal can cooperate with the position change of each component, reduce the complexity of the internal circuit arrangement of the box body, and provide more options for the wiring position of the high-voltage box, and solve the problem of low service life of the high-voltage box caused by the compact arrangement of components inside the high-voltage box and low heat dissipation efficiency in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 It is a structural schematic diagram of the high-voltage box structure disclosed in this application;

[0019] Figure 2 It is a structural schematic diagram of the bottom shell in the high-voltage box structure disclosed in this application;

[0020] Figure 3 is a cross-sectional view of the high-voltage box structure disclosed in this application;

[0021] Figure 4 for Figure 2 A magnified view of part A;

[0022] Figure 5 for Figure 2 A magnified view of part B;

[0023] Figure 6 for Figure 3 Enlarged view of part C;

[0024] Figure 7 for Figure 2 Enlarged view of part D.

[0025] The above drawings include the following reference numerals:

[0026] 1. Box body; 11. Inner wall surface; 110. First inner wall surface; 111. Second inner wall surface; 12. Outer wall surface; 120. Mounting groove; 121. First outer wall surface; 122. Second outer wall surface; 13. Bottom shell; 130. Connecting flange; 14. Cover plate; 140. Cover plate body; 141. Connecting body; 15. Sealing component;

[0027] 2. Mounting bracket; 20. First supporting bracket; 21. First body; 22. Second body; 23. Third body; 24. Second supporting bracket; 240. Fixed body; 241. Supporting body; 242. Supporting sheet metal; 3. Component group; 30. Terminal block; 31. Fuse; 4. Wiring terminal; 41. First group of wiring terminal; 42. Second group of wiring terminal; 5. Battery management module; 6. Limiting bracket; 60. Limiting space; 61. Fixing plate; 62. Limiting body. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0031] As mentioned in the background technology, in the energy storage high-voltage box in the prior art, multiple components are integrated internally to form a battery management system. The components are compactly arranged inside the box, which is not only not conducive to the heat dissipation of the components, but also leads to low utilization of the internal space of the box, complex circuit arrangement, and reduced service life of the high-voltage box. Therefore, the present application provides a high-voltage box structure, including a box body 1, a mounting bracket 2, a component group 3 and a plurality of wiring terminals 4. The mounting bracket 2 is arranged on the inner wall surface 11 of the box body 1, and at least part of the component group 3 is detachably mounted on the mounting bracket 2. In this way, the space on the inner wall surface 11 of the box body 1 is utilized, so that some components can be fixed on the inner wall surface 11 through the mounting bracket 2, thereby avoiding the problem that the component group 3 is concentrated in the bottom surface installation area of ​​the box body 1, resulting in a compact arrangement of the components in the component group 3 and complicated wiring; further, each wiring terminal 4 is arranged on the outer wall surface 12, and each wiring terminal 4 is arranged at intervals along the circumferential direction of the outer wall surface 12. In this way, the arrangement of the wiring terminals 4 can adapt to the arrangement layout of the components inside the box body 1, and at the same time provide more options for the wiring position of the high-voltage box, so that the internal wiring of the box body 1 is more reasonable and beautiful, and solves the problem of reduced service life of the high-voltage box due to the compact arrangement of components inside the high-voltage box and low heat dissipation efficiency.

[0032] See also Figures 1 to 7 As shown, the present application provides a high-voltage box structure, including: a box body 1, the box body 1 includes an inner wall 11 and an outer wall 12; a mounting bracket 2, arranged on the inner wall 11; a component group 3, at least part of the component group 3 is detachably mounted on the mounting bracket 2; a plurality of wiring terminals 4, arranged on the outer wall 12, and each wiring terminal 4 is arranged at intervals along the circumferential direction of the outer wall 12.

[0033] According to the high-voltage box structure provided in the present application, it includes a box body 1, a mounting bracket 2, a component group 3 and a plurality of wiring terminals 4, the box body 1 includes an inner wall 11 and an outer wall 12; the mounting bracket 2 is arranged on the inner wall 11; at least part of the component group 3 is detachably mounted on the mounting bracket 2; a plurality of wiring terminals 4 are arranged on the outer wall 12, and each wiring terminal 4 is arranged at intervals along the circumferential direction of the outer wall 12. Among them, by arranging a mounting bracket 2 on the inner wall 11 of the box body 1, at least part of the component group 3 is detachably mounted on the mounting bracket 2, so that the installation space of the inner wall 11 of the box body 1 can be reasonably utilized, avoiding the problem that all components in the component group 3 are concentrated in the bottom installation area of ​​the box body 1, thereby causing problems such as compact arrangement of components and poor heat dissipation. In addition, the various wiring terminals 4 are arranged at intervals along the circumferential direction of the outer wall 12, so that the various wiring terminals 4 can cooperate with the position changes of various components, reducing the complexity of the internal circuit arrangement of the box body 1, and at the same time providing more options for the wiring position of the high-voltage box, thereby solving the problem of low service life of the high-voltage box caused by compact arrangement of components inside the high-voltage box and low heat dissipation efficiency in the prior art.

[0034] Specifically, the plurality of connection terminals 4 include a first group of connection terminals 41 and a second group of connection terminals 42; the outer wall surface 12 includes: a first outer wall surface 121 and a second outer wall surface 122 connected to each other, the first group of connection terminals 41 are arranged on the first outer wall surface 121, and the second group of connection terminals 42 are arranged on the second outer wall surface 122. By arranging the first group of connection terminals 41 and the second group of connection terminals 42 on the first outer wall surface 121 and the second outer wall surface 122, respectively, the number of terminals on the first outer wall surface 121 or the second outer wall surface 122 of the box body 1 is reduced, and there are more choices when connecting external circuits, which is more convenient.

[0035] In the specific implementation process, Figure 1 As shown, the outer wall surface 12 is provided with a mounting groove 120, and the mounting groove 120 is recessed relative to the outer wall surface 12 toward the middle of the box body 1; some of the plurality of wiring terminals 4 are arranged on the groove bottom surface of the mounting groove 120. This arrangement makes the outer surface of the box body 1 flat, and prevents the wiring terminals 4 on the outer wall surface 12 from protruding from the outer wall surface 12. Preferably, the mounting groove 120 is arranged on the first outer wall surface 121, and the first group of wiring terminals 41 is arranged on the groove bottom surface of the mounting groove 120, which makes it easier to route the wires on the side and does not affect the internal space of the box body 1.

[0036] In the actual assembly process, an opening is opened on the first outer wall surface 121, and a mounting plate with a groove is installed at the opening and welded to the box body 1 to form a mounting groove on the outer wall surface 12, wherein the first group of wiring terminals 41 is a connector socket.

[0037] In the embodiments provided in this application, Figure 2 and Figure 7 As shown, the component group 3 includes a terminal row 30, and the mounting bracket 2 includes: a first support frame 20, which is arranged on the inner wall surface 11, and the middle part of the first support frame 20 protrudes in a direction away from the inner wall surface 11, and the terminal row 30 is arranged on the first support frame 20. The terminal row 30 is supported by the first support frame 20.

[0038] Specifically, the first support frame 20 includes: a first body 21, a second body 22 and a third body 23 connected in sequence, the first body 21 and the third body 23 are respectively connected to the inner wall surface 11, the second body 22 is opposite to the inner wall surface 11 and is arranged at intervals; at least part of the terminal row 30 is arranged on the second body 22. By arranging the second body 22 and the inner wall surface 11 at intervals, the terminal row 30 is kept at a certain distance from the inner wall surface 11, which is conducive to heat dissipation of the terminal row 30.

[0039] Furthermore, the component group 3 includes a fuse 31, such as Figure 4 As shown, the mounting bracket 2 includes: a second support frame 24, which is arranged on the inner wall surface 11, and the second support frame 24 includes a fixed body 240 and a supporting body 241 that are connected to each other, the fixed body 240 is connected to the inner wall surface 11, and a supporting sheet metal 242 is arranged on the supporting body 241, and the supporting sheet metal 242 is opposite to the inner wall surface 11 to form an avoidance space between the supporting sheet metal 242 and the inner wall surface 11, and at least a part of the fuse 31 is arranged in the avoidance space and connected to the supporting sheet metal 242. Specifically, the support body 241 extends from the fixed body 240 toward the middle of the box body 1, and the support sheet metal 242 extends along the height direction of the box body 1 so that the support sheet metal 242 is opposite to the inner wall 11. There are two support sheet metals 242, and the two support sheet metals 242 are respectively arranged at both ends of the support body 241. A card slot is provided on the fuse 31. When the fuse 31 is placed in the avoidance space, the support sheet metal 242 and the groove wall of the card slot are used to stop each other, so that the support sheet metal 242 supports and fixes the fuse 31.

[0040] In the specific implementation process, the inner wall surface 11 includes a first inner wall surface 110 and a second inner wall surface 111 connected to each other, the first inner wall surface 110 extends along the length direction of the box body 1, and the mounting bracket 2 is arranged on the first inner wall surface 110; the high-voltage box structure also includes: a battery management module 5, which is arranged on the second inner wall surface 111, and the outlet of the battery management module 5 is opposite to the top wall surface of the box body 1. In this way, the battery management module 5 is placed vertically (that is, the width direction of the battery management module 5 is consistent with the height direction of the box body 1), and the outlet of the battery management module 5 is opposite to the top wall surface of the box body 1, so that the top outlet of the battery management module 5 is more convenient for wiring. Preferably, the first inner wall surface 110 is opposite to the first outer wall surface 121.

[0041] Furthermore, the high-voltage box structure further includes: a limiting bracket 6, on which a limiting space 60 for limiting the wire is provided; there are a plurality of limiting brackets 6, and the plurality of limiting brackets 6 are arranged at intervals on the inner wall surface 11. When the wire is connected from the battery management module 5 and other components, the wire passes through the limiting space 60 to fix the wire.

[0042] Preferably, the limiting bracket 6 comprises: a fixing piece 61, which is arranged on the inner wall surface 11; a limiting body 62, which is arranged on the fixing piece 61, the middle part of the limiting body 62 protrudes in the direction away from the fixing piece 61, and the limiting space 60 is arranged between the limiting body 62 and the fixing piece 61. By arranging the fixing piece 61 and the limiting body 62 on the inner wall surface 11, the fixed position of the wire is achieved when it is routed on the inner wall surface 11, avoiding the problem of complicated line arrangement caused by the wires being concentrated in the bottom area of ​​the box body 1.

[0043] In the embodiment provided in the present application, the box body 1 includes: a bottom shell 13, each component group 3 is arranged in the bottom shell 13; a cover plate 14, which is covered on the bottom shell 13, and the cover plate 14 includes a cover plate body 140 and a connecting body 141 that are connected to each other, and the connecting body 141 extends along the circumferential direction of the cover plate body 140, and the cover plate body 140 protrudes in a direction away from the bottom shell 13 relative to the connecting body 141, and the connecting body 141 is connected to the bottom shell 13; a sealing component 15, which is arranged between the bottom shell 13 and the cover plate 14. Among them, a connecting flange 130 is provided on the bottom shell 13, and the connecting flange 130 is arranged along the circumferential direction of the bottom shell 13, and the connecting flange 130 extends toward the middle direction of the bottom shell 13, and the connecting flange 130 is connected to the connecting body 141 by screws. The sealing component 15 can ensure the sealing between the bottom shell 13 and the cover plate 14. The cover plate body 140 protrudes relative to the connecting body 141 in the direction away from the bottom shell 13, so that the cover plate 14 is concave on all sides, which facilitates the connection while avoiding affecting the overall external dimensions of the box body 1.

[0044] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0045] According to the high-voltage box structure provided in the present application, it includes a box body 1, a mounting bracket 2, a component group 3 and a plurality of wiring terminals 4, the box body 1 includes an inner wall 11 and an outer wall 12; the mounting bracket 2 is arranged on the inner wall 11; at least part of the component group 3 is detachably mounted on the mounting bracket 2; a plurality of wiring terminals 4 are arranged on the outer wall 12, and each wiring terminal 4 is arranged at intervals along the circumferential direction of the outer wall 12. Among them, by arranging a mounting bracket 2 on the inner wall 11 of the box body 1, at least part of the component group 3 is detachably mounted on the mounting bracket 2, so that the installation space of the inner wall 11 of the box body 1 can be reasonably utilized, avoiding the problem that all components in the component group 3 are concentrated in the bottom installation area of ​​the box body 1, thereby causing problems such as compact arrangement of components and poor heat dissipation. In addition, the various wiring terminals 4 are arranged at intervals along the circumferential direction of the outer wall 12, so that the various wiring terminals 4 can cooperate with the position changes of various components, reducing the complexity of the internal circuit arrangement of the box body 1, and at the same time providing more options for the wiring position of the high-voltage box, thereby solving the problem of low service life of the high-voltage box caused by compact arrangement of components inside the high-voltage box and low heat dissipation efficiency in the prior art.

[0046] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0047] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0048] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. 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 high voltage box structure, characterized in that: include: A box body (1), the box body (1) comprising an inner wall surface (11) and an outer wall surface (12); A mounting bracket (2) arranged on the inner wall surface (11); A component group (3), at least part of which is detachably mounted on the mounting bracket (2); A plurality of connection terminals (4) are arranged on the outer wall surface (12), and each of the connection terminals (4) is arranged at intervals along the circumferential direction of the outer wall surface (12).

2. The high voltage box structure according to claim 1, characterized in that: The plurality of connection terminals (4) include a first group of connection terminals (41) and a second group of connection terminals (42); the outer wall surface (12) includes: A first outer wall surface (121) and a second outer wall surface (122) are connected to each other, the first group of connection terminals (41) are arranged on the first outer wall surface (121), and the second group of connection terminals (42) are arranged on the second outer wall surface (122).

3. The high voltage box structure according to claim 1, characterized in that: The outer wall surface (12) is provided with a mounting groove (120), and the mounting groove (120) is recessed relative to the outer wall surface (12) toward the middle of the box body (1); Some of the plurality of connection terminals (4) are arranged on the bottom surface of the installation groove (120).

4. The high voltage box structure according to claim 1, characterized in that: The component group (3) comprises a terminal block (30), and the mounting bracket (2) comprises: The first support frame (20) is arranged on the inner wall surface (11), the middle part of the first support frame (20) protrudes in a direction away from the inner wall surface (11), and the terminal row (30) is arranged on the first support frame (20).

5. The high voltage box structure according to claim 4, characterized in that: The first support frame (20) comprises: A first body (21), a second body (22) and a third body (23) connected in sequence, wherein the first body (21) and the third body (23) are respectively connected to the inner wall surface (11), and the second body (22) is opposite to the inner wall surface (11) and is arranged at a distance; At least a portion of the terminal row (30) is arranged on the second body (22).

6. The high voltage box structure according to claim 1, characterized in that: The component group (3) includes a fuse (31), and the mounting bracket (2) includes: A second support frame (24) is arranged on the inner wall surface (11), and the second support frame (24) comprises a fixed body (240) and a support body (241) which are connected to each other, the fixed body (240) is connected to the inner wall surface (11), and a support sheet metal (242) is arranged on the support body (241), and the support sheet metal (242) is opposite to the inner wall surface (11) to form an escape space between the support sheet metal (242) and the inner wall surface (11), and at least a part of the fuse (31) is arranged in the escape space and connected to the support sheet metal (242).

7. The high voltage box structure according to claim 1, characterized in that: The inner wall surface (11) comprises a first inner wall surface (110) and a second inner wall surface (111) which are connected to each other, the first inner wall surface (110) extends along the length direction of the box body (1), and the mounting bracket (2) is arranged on the first inner wall surface (110); The high voltage box structure also includes: A battery management module (5) is arranged on the second inner wall surface (111), and a line outlet of the battery management module (5) is opposite to the top wall surface of the box body (1).

8. The high voltage box structure according to claim 1, characterized in that: The high voltage box structure also includes: A limiting bracket (6), wherein the limiting bracket (6) is provided with a limiting space (60) for limiting the position of the wire; There are a plurality of the limiting brackets (6), and the plurality of limiting brackets (6) are arranged at intervals on the inner wall surface (11).

9. The high voltage box structure according to claim 8, characterized in that: The limiting bracket (6) comprises: A fixing plate (61) is arranged on the inner wall surface (11); The limiting body (62) is arranged on the fixing plate (61), the middle part of the limiting body (62) protrudes in a direction away from the fixing plate (61), and the limiting space (60) is arranged between the limiting body (62) and the fixing plate (61).

10. The high voltage box structure according to claim 1, characterized in that: The box body (1) comprises: A bottom shell (13), each of the component groups (3) being arranged in the bottom shell (13); a cover plate (14), which is disposed on the bottom shell (13); the cover plate (14) comprises a cover plate body (140) and a connecting body (141) which are connected to each other; the connecting body (141) extends along the circumferential direction of the cover plate body (140); the cover plate body (140) protrudes relative to the connecting body (141) in a direction away from the bottom shell (13); and the connecting body (141) is connected to the bottom shell (13); A sealing component (15) is arranged between the bottom shell (13) and the cover plate (14).

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