Limiting device and battery pack

Abstract

The embodiment of the utility model relates to a limiting device and a battery pack. Wherein the limiting device comprises a limiting piece, a clamping assembly and a fastening assembly, the limiting piece is used for being embedded in a box body of the battery pack, the clamping assembly is detachably connected to the limiting piece, and the multiple wire harnesses are arranged and inserted into the clamping assembly in a penetrating mode; the fastening assembly is connected to the limiting piece and the clamping assembly at the same time, the clamping assembly clamps the wire harness under the action of the fastening assembly, and the limiting piece and the clamping assembly are both made to abut against the box body so as to limit the position posture of the wire harness relative to the box body. The limiting device provided by the embodiment of the utility model can greatly reduce the droop or tensioning phenomenon of the wire harness, ensures the stability of a line, can prevent the fluctuation or pulling problem of the wire harness caused by vibration, and can quickly find out a fault point in a fault period and improve the maintenance efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a limiting device and a battery pack. BACKGROUND

[0002] The wiring harness existing in the battery is generally treated by fixing it. At present, the wiring harness in the battery is mostly fixed on the middle beam by a plastic buckle, or the shorter sampling wiring harness is directly suspended and not fixed.

[0003] However, during the driving of the electric vehicle, the sampling wiring harness will fluctuate and be pulled due to vibration, which is easy to cause the connection between the sampling wiring harness and the plug-in to be loose, resulting in the BMS system of the whole vehicle reporting voltage, temperature or current instantaneous or long-term jump faults, and increasing the difficulty of troubleshooting in the later period. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the embodiments of the present application provide a limiting device and a battery pack to solve at least one problem in the background art.

[0005] In a first aspect, the embodiments of the present application provide a limiting device, which is used to limit the position and posture of the wiring harness in a battery pack; the limiting device comprises:

[0006] a limiting piece, which is used to be embedded in a box body of the battery pack;

[0007] a clamping assembly, which is detachably connected to the limiting piece, and a plurality of the wiring harnesses are arranged and inserted in the clamping assembly;

[0008] a fastening assembly, which is connected to the limiting piece and the clamping assembly at the same time, the clamping assembly clamps the wiring harness under the action of the fastening assembly, and the limiting piece and the clamping assembly are both in abutment with the box body, so as to limit the position and posture of the wiring harness relative to the box body.

[0009] In combination with the first aspect of the present application, in an optional implementation, the clamping assembly comprises:

[0010] a first pressing assembly, which is detachably connected to the limiting piece;

[0011] a second pressing assembly, which is oppositely arranged with the first pressing assembly and is detachably connected, and the wiring harness is placed between the first pressing assembly and the second pressing assembly;

[0012] wherein, the first pressing assembly and the second pressing assembly are both in abutment with the surface of the wiring harness under the action of the fastening assembly.

[0013] In combination with the first aspect of the present application, in an optional implementation, the first pressing assembly comprises:

[0014] a first pressing member detachably connected to the limiting member;

[0015] a first elastic member connected to the first pressing member, and a surface of the first elastic member is provided with a plurality of first wire passing grooves for placing the wire harness;

[0016] the second pressing assembly comprises:

[0017] a second pressing member detachably connected to the first pressing member;

[0018] a second elastic member connected to the second pressing member, and a surface of the second elastic member is provided with a plurality of second wire passing grooves, which are spliced with the first wire passing grooves to form a wire passing hole for accommodating and matching the diameter of the wire harness.

[0019] In an optional implementation of the first aspect of the present application, the first pressing assembly further comprises a first structural adhesive connected between the first pressing member and the first elastic member.

[0020] The second pressing assembly further comprises a second structural adhesive connected between the second pressing member and the second elastic member.

[0021] In an optional implementation of the first aspect of the present application, the limiting member has a first limiting portion and a second limiting portion, the first limiting portion is detachably connected with the clamping assembly, the first limiting portion is used for movably embedding in the box body, and the second limiting portion can abut against the bottom of the box body under the action of the fastening assembly.

[0022] In an optional implementation of the first aspect of the present application, the first limiting portion is a cylindrical structure.

[0023] In an optional implementation of the first aspect of the present application, the limiting member further has a third limiting portion, the third limiting portion is a sliding plate extended outward from the outer wall of the first limiting portion, and the sliding plate is used for matching a sliding groove with a dovetail structure on the box body.

[0024] The first pressing assembly is clamped on the first limiting portion and can rotate relative to the first limiting portion.

[0025] In a second aspect, the embodiments of the present application provide a battery pack, which comprises the limiting device according to any one of the embodiments of the first aspect, and further comprises:

[0026] a box body provided with a sliding groove extending in a first direction;

[0027] a sampling plug connected to the box;

[0028] a wire harness having one end connected to the sampling plug;

[0029] The limiting member is embedded in the sliding groove and can slide in the first direction in the sliding groove, and the clamping assembly can rotate relative to the sliding groove.

[0030] Under the action of the fastening assembly, the limiting member and the clamping assembly are in abutment with the box, and the clamping assembly is clamped to the surface of the wire harness to limit the position and posture of the wire harness relative to the box.

[0031] In combination with the second aspect of the application, in an optional implementation, the box includes a cross beam, and a plurality of sampling plugs are connected to the top of the cross beam. The sliding groove is a through groove provided on the surface of the side wall of the cross beam, and the through groove extends in the first direction.

[0032] In combination with the second aspect of the application, in an optional implementation, the cross beam is further provided with a clamping port connected to the end of the through groove, and the clamping port is used to clamp the limiting member so that the limiting member is embedded in the cross beam.

[0033] The limiting device provided in the embodiments of the application can adjust the position and posture of the clamping assembly and the position and posture of the wire harness before the fastening assembly is locked, and can further limit the position and posture of the wire harness relative to the box after the limiting member and the clamping assembly are locked by the fastening assembly after the position and posture adjustment is completed. The limiting device can greatly reduce the occurrence of wire harness sagging or tensioning, ensure the stability of the circuit, prevent the occurrence of wire harness fluctuation or pulling caused by vibration, and quickly find the fault point during the fault period and improve the maintenance efficiency.

[0034] Additional aspects and advantages of the application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0035] The accompanying drawings illustrated herein are used to provide further understanding of the application, and constitute a part of the application. The illustrative embodiments of the application and their descriptions serve to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0036] Figure 1 The state diagram of the limiting device provided in the embodiments of the application installed with the wire harness embedded on the battery pack box;

[0037] Figure 2 The specific structure diagram of the clamping assembly in the limiting device provided in the embodiments of the application;

[0038] Figure 3 A schematic diagram showing the state of a limiting device with a wire harness installed on a housing, as provided in another embodiment of this application;

[0039] Figure 4 This is a schematic diagram of the structure of the limiting member in the limiting device provided in the embodiments of this application;

[0040] Figure 5 This is a schematic diagram of the overall structure of the battery pack provided in an embodiment of this application.

[0041] Figure label:

[0042] 10. Housing; 11. Crossbeam; 111. Slide groove; 112. Snap-in port;

[0043] 20. Limiting device; 21. Limiting component; 211. First limiting part; 2111. First mounting hole; 2112. Snap-fit ​​protrusion; 212. Second limiting part; 213. Third limiting part;

[0044] 22. Clamping assembly; 221. First pressing assembly; 2211. First pressing member; 2212. First elastic member; 2213. First wire guide groove; 222. Second pressing assembly; 2221. Second pressing member; 2222. Second elastic member; 2223. Second wire guide groove; 2224. Slot;

[0045] 23. Fastening components;

[0046] 30. Sampling plug-in; 40. Wiring harness. Detailed Implementation

[0047] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the specific embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the disclosure of the present application to those skilled in the art.

[0048] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, to avoid confusion with this application, some technical features well-known in the art have not been described; that is, not all features of actual embodiments are described herein, nor are well-known functions and structures described in detail.

[0049] In the accompanying drawings, for clarity, the dimensions of layers, areas, and elements, as well as their relative dimensions, may be exaggerated. The same reference numerals denote the same elements throughout.

[0050] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this application, the first element, component, area, layer, or portion discussed below may be referred to as a second element, component, area, layer, or portion. And the discussion of a second element, component, area, layer, or portion does not imply that the first element, component, area, layer, or portion necessarily exists in this application.

[0051] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below,” “under,” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.

[0052] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0053] To fully understand this application, detailed steps and structures will be presented in the following description to illustrate the technical solution of this application. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.

[0054] like Figure 1 As shown in the figure, this application embodiment provides a limiting device 20 for limiting the position and orientation of wiring harnesses 40 in a battery pack. The limiting device 20 includes a limiting member 21, a clamping assembly 22, and a fastening assembly 23. The limiting member 21 is embedded in the battery pack housing 10. The clamping assembly 22 is detachably connected to the limiting member 21, and multiple wiring harnesses 40 are arranged and inserted through the clamping assembly 22. The fastening assembly 23 is connected to both the limiting member 21 and the clamping assembly 22. Under the action of the fastening assembly 23, the clamping assembly 22 clamps the wiring harnesses 40, and both the limiting member 21 and the clamping assembly 22 abut against the housing 10, thereby limiting the position and orientation of the wiring harnesses 40 relative to the housing 10.

[0055] The above limiting device 20 allows for adjustment of the position and orientation of the clamping component 22 before the fastening component 23 is locked, thereby adjusting the position and orientation of the wire harness 40. After the position and orientation adjustment is completed, the fastening component 23 is used to lock the limiting component 21 and the clamping component 22, further limiting the position and orientation of the wire harness 40 relative to the housing 10. This limiting device 20 can greatly reduce the occurrence of sag or tension of the wire harness 40, ensuring line stability. After the surrounding components are assembled, the limiting device 20, combined with the arrangement direction of the sampling wire harness 40, adjusts the position and orientation of the wire harness 40 for reasonable arrangement, which can prevent the wire harness 40 from fluctuating or being pulled due to vibration. At the same time, it can also quickly find the fault point during the fault period and improve maintenance efficiency.

[0056] In an optional embodiment, the clamping assembly 22 includes a first clamping assembly 221 and a second clamping assembly 222. The first clamping assembly 221 is detachably connected to the limiting member 21, and the second clamping assembly 222 is disposed opposite to and detachably connected to the first clamping assembly 221. The space between the second clamping assembly 222 and the first clamping assembly 221 is used to place the wire harness 40. Both the first clamping assembly 221 and the second clamping assembly 222 abut against the surface of the wire harness 40 under the action of the fastening assembly 23.

[0057] The wire harness 40 is placed between the first clamping component 221 and the second clamping component 222. When it is necessary to place the wire harness 40 between the first clamping component 221 and the second clamping component 222, the distance between the first clamping component 221 and the second clamping component 222 is increased to facilitate the placement of the wire harness 40. After the placement of the wire harness 40 is completed, the first clamping component 221 and the second clamping component 222 contact the wire harness 40 and are clamped to the surface of the wire harness 40 under the action of the fastening component 23.

[0058] Figure 1 The diagram shows that the first clamping assembly 221 and the second clamping assembly 222 are two completely separable components. Alternatively, the first clamping assembly 221 and the second clamping assembly 222 may be movably connected, for example, by hinge, rotation, or sliding.

[0059] In an alternative embodiment, such as Figure 2 As shown, the first clamping assembly 221 includes a first clamping member 2211 and a first elastic member 2212. The first clamping member 2211 is detachably connected to the limiting member 21, and the first elastic member 2212 is connected to the first clamping member 2211. The surface of the first elastic member 2212 is provided with a plurality of first wire passage grooves 2213, which are used to place the wire harness 40.

[0060] The second clamping assembly 222 includes a second clamping member 2221 and a second elastic member 2222. The second clamping member 2221 is detachably connected to the first clamping member 2211. The second elastic member 2222 is connected to the second clamping member 2221, and the surface of the second elastic member 2222 is provided with a plurality of second wire passage grooves 2223. The second wire passage grooves 2223 and the first wire passage grooves 2213 are spliced ​​to form a wire passage hole for accommodating and matching the diameter of the wire harness 40.

[0061] Multiple first wire guide grooves 2213 and multiple second wire guide grooves 2223 are arranged at intervals in one direction to isolate and fix each wire bundle 40, which can greatly reduce wear between adjacent wire bundles 40 caused by vibration.

[0062] The first clamping member 2211 and the second clamping member 2221 are made of composite materials with excellent strength, rigidity, and heat resistance. For example, the composite material is PA66 (polyamide 66) + 30% GF (glass fiber), but this is not the only option. Additionally, the first elastic member 2212 and the second elastic member 2222 are made of rubber. Rubber has good elasticity, wear resistance, and electrical insulation. The good elasticity of the first elastic member 2212 and the second elastic member 2222 increases the friction between them and the wire harness 40, thereby ensuring the stability of clamping the wire harness 40. Of course, the embodiments of this application are not limited to this.

[0063] Furthermore, the first clamping assembly 221 also includes a first structural adhesive, which connects the first clamping member 2211 and the first elastic member 2212. The second clamping assembly 222 also includes a second structural adhesive, which connects the second clamping member 2221 and the second elastic member 2222.

[0064] The first elastic element 2212 is embedded in the first clamping element 2211 and fixed by the first structural adhesive. Similarly, the second elastic element 2222 is embedded in the second clamping element 2221 and fixed by the second structural adhesive to ensure the connection stability between the first elastic element 2212 and the first clamping element 2211, and between the second elastic element 2222 and the second clamping element 2221. The specific types of the first and second structural adhesives are not specifically limited in the embodiments of this application.

[0065] In an alternative embodiment, such as Figure 3 As shown, the limiting member 21 has a first limiting part 211 and a second limiting part 212. The first limiting part 211 is detachably connected to the clamping assembly 22. The first limiting part 211 is used to be movably embedded in the housing 10. The second limiting part 212 can abut against the bottom of the housing 10 under the action of the fastening assembly 23.

[0066] Furthermore, the first limiting part 211 has a cylindrical structure and can rotate relative to the housing 10, thereby adjusting the position and orientation of the clamping assembly 22 and the clamped wire harness 40. After the adjustment is completed, the second limiting part 212 is locked to the clamping assembly 22 by the fastening assembly 23 to limit the position and orientation of the wire harness 40 relative to the housing 10.

[0067] In an alternative embodiment, such as Figure 2 , Figure 3 and Figure 4 As shown, the first limiting part 211 has a first mounting hole 2111 with a circular cross-section, and the inner wall of the first mounting hole 2111 is provided with snap-fit ​​protrusions 2112 distributed circumferentially thereon. The first pressing assembly 221 is provided with a snap-fit ​​groove 2224 with a circular cross-section, and the snap-fit ​​groove 2224 is rotatably snapped with the snap-fit ​​protrusions 2112 so that the first pressing assembly 221 rotates relative to the first limiting part 211.

[0068] It can be understood that the limiting member 21 can only move relative to the slide 111 in the first direction and cannot rotate, while the first pressing component 221 can rotate relative to the slide 111. The rotation and movement of the wire harness are realized through the cooperation of the limiting member 21 and the first pressing component 221, so that the wire harness can be adjusted to a suitable position and posture.

[0069] In an alternative embodiment, such as Figure 1 and Figure 4 As shown, the limiting member 21 also has a third limiting part 213, which is a sliding plate extending outward from the outer wall of the first limiting part 211. The sliding plate is used to match the dovetail-shaped groove 111 on the housing 10. The first pressing component 221 is engaged with the first limiting part 211 and can rotate relative to the first limiting part 211.

[0070] The third limiting part 213 can restrict the rotation of the first limiting part 211 and the second limiting part 212 relative to the housing 10, thereby improving the convenience of locking the limiting part and the clamping part 22 using the fastening component 23. In addition, the first pressing component 221 can rotate relative to the first limiting part 211, thus ensuring the adjustment of the position and posture of the wire harness 40.

[0071] This can be understood as follows: when the limiting member 21 does not have a third limiting part 213, during the fastening process using the fastening assembly 23, external force is required to fix the second limiting part 212. The third limiting part 213 can restrict the rotation of the first limiting part 211 and the second limiting part 212 relative to the housing 10. In addition, the dovetail-shaped slide 111 not only has high rigidity and can withstand large working loads, but also maintains precise positioning.

[0072] This application also provides a battery pack, such as... Figure 1 and Figure 5 As shown, the battery pack includes the limiting device 20 provided in any of the above embodiments; the battery pack also includes a housing 10, a sampling plug-in 30, and a wiring harness 40. The housing 10 is provided with a sliding groove 111, which extends along a first direction... Figure 5 The arrow s1 shown in the diagram extends in that direction. The sampling plug 30 is connected to the housing 10, and one end of the wire harness 40 is connected to the sampling plug 30. The limiting member 21 is embedded in the slide groove 111 and can slide in the slide groove 111 along the first direction. The clamping assembly 22 can rotate relative to the slide groove 111 to adjust the position and orientation of the wire harness 40 relative to the housing 10.

[0073] Under the action of the fastening component 23, both the limiting component 21 and the clamping component 22 abut against the housing 10, and the clamping component 22 clamps the wire harness 40 surface to limit the position and posture of the wire harness 40 relative to the housing 10.

[0074] The battery pack described above includes a first state and a second state for the limiting device 20. The first state is an adjustable position and orientation of the wiring harness 40, while the second state is a fixed and non-adjustable position and orientation between the wiring harness 40 and the housing 10. In the first state, the wiring harness 40 can move relative to the slide 111 and rotate relative to the slide 111. The position of the wiring harness 40 within the clamping assembly 22 is also adjustable. The position and orientation of the clamping assembly 22 are adjusted according to the direction of the wiring harness 40 and the allowable tightness, thereby adjusting the position and orientation of the wiring harness 40. After the adjustment is completed, the limiting device 20 is switched from the first state to the second state by the fastening assembly 23.

[0075] When the limiting device 20 is in the second state, both the clamping component 22 and the limiting member 21 abut against the housing 10, and the clamping component 22 clamps the wiring harness 40. The limiting device 20 of this embodiment can move and rotate to adjust the arrangement direction of the wiring harness 40 based on the assembly position of the surrounding components, which can improve the rationality of the wiring harness 40 layout, thereby improving the stability of the circuit and greatly reducing the occurrence of sagging or tension of the wiring harness 40. At the same time, it can also greatly reduce the occurrence of fluctuation and pulling of the sampling wiring harness 40 caused by subsequent vibration of the battery pack, and can also quickly find the fault point and improve maintenance efficiency during the fault period.

[0076] In an optional embodiment, the housing 10 includes a crossbeam 11, with multiple sampling inserts 30 connected to the top of the crossbeam 11. A groove 111 is a through-slot provided on the sidewall surface of the crossbeam 11, extending along a first direction. Providing the groove 111 directly on the sidewall of the crossbeam 11 reduces the space occupied by the battery pack. The crossbeam 11 can be integrally extruded from an aluminum profile, but is not limited to this.

[0077] In an optional embodiment, the crossbeam 11 is further provided with a snap-in port 112, which is connected to the end of the through groove. The snap-in port 112 is used to snap in the limiting member 21 so that the limiting member 21 is embedded in the crossbeam 11.

[0078] The width of the insertion port 112 is greater than the maximum size of the limiting member 21, so as to facilitate the fitting of the limiting member 21 into the crossbeam 11. When the limiting member 21 is in the slide groove 111, the second limiting member 21 in the second direction... Figure 5 The maximum dimension of the orthographic projection in the direction of arrow s2 shown is greater than the width of the slide groove 111, so that the limiting member 21 can abut against the surface of the housing 10 and cover the slide groove 111 under the action of the fastening component 23.

[0079] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.

Claims

1. A position limiting device, characterized by, The limiting device (20) is used to limit the position and posture of the wire harness (40) in the battery pack; the limiting device (20) comprises: a limiting piece (21) embedded in the box (10) of the battery pack; a clamping assembly (22) detachably connected to the limiting piece (21), and a plurality of wire harnesses (40) arranged in the clamping assembly (22); a fastening assembly (23) connected to the limiting piece (21) and the clamping assembly (22) at the same time, the clamping assembly (22) clamps the wire harness (40) under the action of the fastening assembly (23), and the limiting piece (21) and the clamping assembly (22) are both in abutment with the box (10) to limit the position and posture of the wire harness (40) relative to the box (10).

2. The stop device of claim 1, wherein The clamping assembly (22) comprises: a first pressing assembly (221) detachably connected to the limiting piece (21); a second pressing assembly (222) oppositely arranged and detachably connected with the first pressing assembly (221), and the wire harness (40) is arranged between the first pressing assembly (221) and the second pressing assembly (222); wherein the first pressing assembly (221) and the second pressing assembly (222) are both in abutment with the surface of the wire harness (40) under the action of the fastening assembly (23).

3. The stop device of claim 2, wherein The first pressing assembly (221) comprises: a first pressing piece (2211) detachably connected to the limiting piece (21); a first elastic piece (2212) connected to the first pressing piece (2211), and a plurality of first wire passing grooves (2213) are arranged on the surface of the first elastic piece (2212), and the first wire passing grooves (2213) are used to place the wire harness (40); The second pressing assembly (222) comprises: a second pressing piece (2221) detachably connected with the first pressing piece (2211); a second elastic piece (2222) connected to the second pressing piece (2221), and a plurality of second wire passing grooves (2223) are arranged on the surface of the second elastic piece (2222), and the second wire passing grooves (2223) and the first wire passing grooves (2213) are spliced to form wire passing holes for accommodating and matching the diameter of the wire harness (40).

4. The stop device of claim 3, wherein The first pressing assembly (221) further comprises a first structural adhesive connected between the first pressing piece (2211) and the first elastic piece (2212); The second pressing assembly (222) further comprises a second structural adhesive connected between the second pressing piece (2221) and the second elastic piece (2222).

5. The stop device of claim 2, wherein The limiting piece (21) has a first limiting part (211) and a second limiting part (212), the first limiting part (211) is detachably connected with the clamping assembly (22), and the first limiting part (211) is movably embedded in the box (10), and the second limiting part (212) can abut against the bottom of the box (10) under the action of the fastening assembly (23).

6. The stop device of claim 5, wherein The first limiting part (211) is a cylindrical structure.

7. The stop device of claim 5, wherein The limiting part (21) further has a third limiting part (213) which is a sliding plate extending outward from the outer wall of the first limiting part (211), and is used for matching a sliding groove (111) with dovetail structure on the box (10). The first pressing assembly (221) is clamped on the first limiting part (211) and can rotate relative to the first limiting part (211).

8. A battery pack, characterized by, The limiting device comprises the limiting device according to any one of claims 1 to 7; and further comprises: The box (10) is provided with a sliding groove (111) extending in a first direction; The sampling plug-in (30) is connected to the box (10); The wire harness (40) is connected to the sampling plug-in (30) at one end; The limiting part (21) is embedded in the sliding groove (111) and can slide in the first direction in the sliding groove (111), and the clamping assembly (22) can rotate relative to the sliding groove (111); Under the action of the fastening assembly (23), the limiting part (21) and the clamping assembly (22) are in abutment with the box (10), and the clamping assembly (22) is clamped on the surface of the wire harness (40) to limit the position and posture of the wire harness (40) relative to the box (10).

9. The battery pack of claim 8, wherein, The box (10) comprises a cross beam (11), and a plurality of sampling plug-ins (30) are connected to the top of the cross beam (11); the sliding groove (111) is a through groove provided on the surface of the side wall of the cross beam (11) and extends in the first direction.

10. The battery pack of claim 9, wherein, The cross beam (11) is further provided with a clamping port (112) connected to the end of the through groove, and the clamping port (112) is used for clamping the limiting part (21) so that the limiting part (21) is embedded in the cross beam (11).

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