Pole assembly and top cover

Abstract

The utility model provides a pole assembly and a top cover, and the pole assembly comprises a first cover body, a second cover body, and a top cover, the connecting piece is arranged between the first cover body and the second cover body, the first end of the connecting piece is connected with the end face, opposite to the second cover body, of the first cover body, the second end of the connecting piece is connected with the end face, opposite to the first cover body, of the second cover body, and the first cover body and the second cover body are electrically connected through the connecting piece; and when the current-carrying capacity of the pole assembly is overlarge, the connecting piece can be fused, so that the first cover body and the second cover body are disconnected. By applying the technical scheme of the utility model, the technical problem that the safety is low when the battery is used can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pole, concretely relates to a pole assembly and top cap. BACKGROUND

[0002] With the rapid development of battery industry, square aluminum shell battery has become one of the main research directions of enterprises because of the advantages of high safety and capacity, and the battery has the advantages of good heat dissipation effect and high assembly efficiency. At present, the battery usually adopts the core package tab to realize the electrical connection with the bottom of the pole, so the design of the fuse structure is lacked. When the battery cell is short-circuited, the relatively weak tab structure becomes the main area of temperature rise, and the tab may cause the decomposition of the pole material under high temperature, thereby causing the explosion of the battery, and reducing the safety of the battery in use. SUMMARY

[0003] The embodiment of the utility model provides a kind of pole assembly, can improve the technical problem of low safety of battery in use.

[0004] First, the embodiment of the utility model provides a kind of pole assembly, and the pole assembly includes: first cover body;Second cover body, with first cover body interval arrangement;Connecting piece, it is arranged between first cover body and second cover body, the first end of connecting piece is connected with the end surface of first cover body relative to second cover body, the second end of connecting piece is connected with the end surface of second cover body relative to first cover body, and first cover body and second cover body are electrically connected by connecting piece;Wherein, when the current of pole assembly is too large, connecting piece can be fused to disconnect first cover body and second cover body.

[0005] In an embodiment, the cross-sectional shape of the connecting piece along the length direction of the pole assembly is square, the extension length of the connecting piece along the length direction of the pole assembly is L1, and 0.1mm≤L1≤70mm.

[0006] In an embodiment, the extension length of the connecting piece along the width direction of the pole assembly is L2, and 0.1mm≤L2≤40mm.

[0007] In an embodiment, the extension length of the connecting piece along the height direction of the pole assembly is L3, and 0.1mm≤L3≤4mm.

[0008] In an embodiment, the pole assembly further includes: a barrier piece arranged between the first cover body and the second cover body, the first end of the barrier piece is insulatedly connected with the end surface of the first cover body relative to the second cover body, the second end of the barrier piece is insulatedly connected with the end surface of the second cover body relative to the first cover body, the barrier piece and the connecting piece have a gap therebetween, and the barrier piece is circumferentially arranged outside the connecting piece along the circumference of the first cover body, and the gap is used to accommodate the fused connecting piece.

[0009] In one embodiment, the extending length of the outer periphery of the barrier member along the length direction of the pole assembly is L4, and 4 mm≤L4≤74 mm.

[0010] In one embodiment, the extending length of the inner circumference of the barrier member along the length direction of the pole assembly is L5, and 2mm≤L5≤72mm.

[0011] In one embodiment, the extending length of the outer periphery of the barrier member along the width direction of the pole assembly is L6, and 4 mm≤L6≤44 mm.

[0012] In one embodiment, an extension length of the inner circumference of the barrier along the width direction of the pole assembly is L7, and 2 mm ≤ L7 ≤ 42 mm.

[0013] In one embodiment, the extending length of the barrier member along the height direction of the pole assembly is L8, and 0.1 mm≤L8≤4 mm.

[0014] In one embodiment, the barrier comprises a ceramic pad.

[0015] In one embodiment, the first cover, the second cover and the connecting member are an integrally formed structure.

[0016] In a second aspect, an embodiment of the present invention provides a top cover, which includes the above-mentioned pole assembly.

[0017] By applying the technical solution of the present invention, a connector is provided between the first cover body and the second cover body, the first end of the connector is connected to the end face of the first cover body opposite to the second cover body, and the second end of the connector is connected to the end face of the second cover body opposite to the first cover body. The first cover body and the second cover body are electrically connected via the connector. In this way, when the current in the current loop is too large, the connector can fuse to disconnect the electrical connection between the first cover body and the second cover body, thereby cutting off the circuit to protect the entire battery. The above-mentioned pole assembly has a current overload protection function, thereby improving the safety of the battery during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a three-dimensional schematic diagram of a pole assembly provided by an embodiment of the present utility model;

[0020] Figure 2 is a schematic top view of a pole assembly provided in an embodiment of the present utility model;

[0021] Figure 3 yes Figure 2 Schematic diagram of the cross section at AA in the middle;

[0022] Figure 4 yes Figure 2 Schematic diagram of the cross section at the middle BB;

[0023] Figure 5 This is a side view of a pole assembly provided by an embodiment of the present utility model;

[0024] Figure 6 yes Figure 5 Schematic cross-section at CC;

[0025] Figure 7 It is a three-dimensional schematic diagram of a top cover provided by an embodiment of the present utility model.

[0026] The above drawings include the following reference numerals:

[0027] Pole assembly 1,

[0028] The first cover 10,

[0029] The second cover 20,

[0030] Connector 30,

[0031] Baffle 40,

[0032] The length direction X of the pole assembly, the width direction Y of the pole assembly, and the height direction Z of the pole assembly. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0034] like Figures 1 to 7 As shown, in the first aspect, an embodiment of the present invention provides a pole assembly 1, which includes: a first cover body 10; a second cover body 20, which is spaced apart from the first cover body 10; a connector 30, which is arranged between the first cover body 10 and the second cover body 20, wherein the first end of the connector 30 is connected to the end face of the first cover body 10 relative to the second cover body 20, and the second end of the connector is connected to the end face of the second cover body 20 relative to the first cover body 10, and the first cover body 10 and the second cover body 20 are electrically connected through the connector 30; wherein, when the current carrying capacity of the pole assembly 1 is too large, the connector 30 may be melted to disconnect the first cover body 10 and the second cover body 20.

[0035] The technical scheme of the utility model is applied, the connecting piece 30 is arranged between the first cover body 10 and the second cover body 20, the first end of the connecting piece 30 is connected with the end face of the first cover body 10 opposite the second cover body 20, the second end of the connecting piece is connected with the end face of the second cover body 20 opposite the first cover body 10, the first cover body 10 and the second cover body 20 are electrically connected through the connecting piece 30, so that when the current of the current loop is too large, the connecting piece 30 can be fused to disconnect the electrical connection between the first cover body 10 and the second cover body 20, so as to cut off the circuit to protect the whole battery, the above-mentioned pole assembly 1 has the current overload protection function, thereby the safety of the battery during use can be improved.

[0036] In an embodiment, the cross-sectional shape of the connecting piece 30 along the length direction of the pole assembly 1 is square, the extension length of the connecting piece 30 along the length direction of the pole assembly 1 is L1, and 0.1mm≤L1≤70mm. Such a wide length range enables the connecting piece 30 to adapt to various different pole assembly 1 size and layout requirements. In different application scenarios, appropriate L1 values can be selected according to actual needs to achieve optimal connection effect and performance. Within this length range, the connecting piece 30 can maintain sufficient structural strength to withstand various stresses and loads generated by the battery module during operation.

[0037] Further, stable connection performance helps to ensure safe operation and prolong the service life of the battery module. The moderate length range makes the manufacturing and processing of the connecting piece 30 easier and more controllable. Manufacturers can use standard production processes and procedures to produce connecting pieces 30 that meet the requirements, thereby improving production efficiency and reducing costs. Space utilization: by adjusting the value of L1, the space layout inside the battery module can be optimized to improve space utilization. This helps to reduce the overall size and weight of the battery module, thereby improving its energy density and endurance. The appropriate length of the connecting piece 30 makes the installation process more convenient and fast, reducing installation difficulty and cost. At the same time, when the connecting piece 30 needs to be maintained or replaced, it can also be more convenient to operate. Optionally, the value of L1 can be set to 10mm, 20mm, 70mm, etc.

[0038] In an embodiment, the extension length of the connecting piece 30 along the width direction of the pole assembly 1 is L2, and 0.1mm≤L2≤40mm. Such a wide width range enables the connecting piece 30 to adapt to various different pole assembly 1 size and layout requirements. In different application scenarios, appropriate L2 values can be selected according to actual needs to achieve optimal connection effect and performance. Within this width range, the connecting piece 30 can maintain sufficient structural strength to withstand various stresses and loads generated by the battery module during operation.

[0039] Further, stable connection performance helps to ensure the safe operation and prolong the service life of the battery module. The moderate width range makes the manufacturing and processing of the connecting piece 30 more controllable and easier. Manufacturers can use standard production processes and procedures to produce connecting pieces 30 that meet the requirements, thereby improving production efficiency and reducing costs. Space utilization: by adjusting the value of L2, the space layout inside the battery module can be optimized to improve space utilization. This helps to reduce the overall size and weight of the battery module, thereby improving its energy density and endurance. The appropriate length of the connecting piece 30 makes the installation process more convenient and fast, reducing the difficulty and cost of installation. At the same time, when the connecting piece 30 needs to be maintained or replaced, it is also more convenient to operate. Optionally, the value of L2 can be set to 10mm, 20mm, 40mm, etc.

[0040] In an embodiment, the connecting piece 30 has an extension length along the height direction of the pole assembly 1, L3, 0.1mm≤L3≤4mm. Such a wide height range allows the connecting piece 30 to adapt to various different pole assembly 1 size and layout requirements. In different application scenarios, the appropriate L3 value can be selected according to actual needs to achieve the best connection effect and performance. Within this height range, the connecting piece 30 can maintain sufficient structural strength to withstand various stresses and loads generated by the battery module during operation.

[0041] Further, stable connection performance helps to ensure the safe operation and prolong the service life of the battery module. The moderate width range makes the manufacturing and processing of the connecting piece 30 more controllable and easier. Manufacturers can use standard production processes and procedures to produce connecting pieces 30 that meet the requirements, thereby improving production efficiency and reducing costs. Space utilization: by adjusting the value of L2, the space layout inside the battery module can be optimized to improve space utilization. This helps to reduce the overall size and weight of the battery module, thereby improving its energy density and endurance. The appropriate length of the connecting piece 30 makes the installation process more convenient and fast, reducing the difficulty and cost of installation. At the same time, when the connecting piece 30 needs to be maintained or replaced, it is also more convenient to operate. Optionally, the value of L2 can be set to 10mm, 20mm, 40mm, etc.

[0042] In an embodiment, the pole assembly 1 further comprises a barrier 40 disposed between the first cover 10 and the second cover 20, a first end of the barrier 40 being insulatively connected to an end surface of the first cover 10 opposite the second cover 20, a second end of the barrier 40 being insulatively connected to an end surface of the second cover 20 opposite the first cover 10, a space being provided between the barrier 40 and the connecting member 30, and the barrier 40 being circumferentially disposed around the outer periphery of the connecting member 30 along the first cover 10, the space being used to accommodate the connecting member 30 after being fused. By arranging the above structure, the fused connecting member 30 can be prevented from overflowing from the pole assembly 1, thereby ensuring the safety during the operation of the battery.

[0043] In an embodiment, the barrier 40 has an extension length L4 along the length direction of the pole assembly 1, and 4mm≤L4≤74mm. Such a wide length range allows the connecting member 30 to adapt to various different sizes and layout requirements of the pole assembly 1. In different application scenarios, a suitable value of L4 can be selected according to actual requirements to achieve the best connection effect and performance. Within this length range, the connecting member 30 can maintain sufficient structural strength to withstand various stresses and loads generated during the operation of the battery module.

[0044] Further, stable connection performance helps to ensure the safe operation and prolong the service life of the battery module. The moderate length range makes the manufacturing and processing of the connecting member 30 easier and more controllable. Manufacturers can use standard production processes and procedures to produce connecting members 30 that meet the requirements, thereby improving production efficiency and reducing costs. Space utilization: By adjusting the value of L4, the space layout inside the battery module can be optimized to improve space utilization. This helps to reduce the overall size and weight of the battery module, thereby improving its energy density and endurance. The appropriate length of the connecting member 30 makes the installation process more convenient and fast, reducing the difficulty and cost of installation. At the same time, when the connecting member 30 needs to be maintained or replaced, it can also be more convenient to operate. Optionally, the value of L4 can be set to 4mm, 20mm, 74mm, etc.

[0045] In an embodiment, the barrier 40 has an extension length L5 along the length direction of the pole assembly 1, and 2mm≤L5≤72mm. Such a wide length range allows the connecting member 30 to adapt to various different sizes and layout requirements of the pole assembly 1. In different application scenarios, a suitable value of L5 can be selected according to actual requirements to achieve the best connection effect and performance. Within this length range, the connecting member 30 can maintain sufficient structural strength to withstand various stresses and loads generated during the operation of the battery module.

[0046] Further, stable connection performance helps to ensure the safe operation and prolong the service life of the battery module. The moderate length range makes the manufacturing and processing of the connecting piece 30 more controllable and easier. Manufacturers can use standard production processes and procedures to produce connecting pieces 30 that meet the requirements, thereby improving production efficiency and reducing costs. Space utilization: By adjusting the value of L5, the space layout inside the battery module can be optimized to improve space utilization. This helps to reduce the overall size and weight of the battery module, thereby improving its energy density and endurance. The appropriate length of the connecting piece 30 makes the installation process more convenient and fast, reducing the difficulty and cost of installation. At the same time, when the connecting piece 30 needs to be maintained or replaced, it is also more convenient to operate. Optionally, the value of L5 can be set to 2mm, 20mm, 74mm, etc.

[0047] In an embodiment, the extension length of the outer periphery of the barrier 40 along the width direction of the pole assembly 1 is L6, 4mm≤L6≤44mm. Such a wide width range enables the connecting piece 30 to adapt to various different pole assembly 1 size and layout requirements. In different application scenarios, the appropriate L6 value can be selected according to actual needs to achieve the best connection effect and performance. Within this width range, the connecting piece 30 can maintain sufficient structural strength to withstand various stresses and loads generated by the battery module during operation.

[0048] Further, stable connection performance helps to ensure the safe operation and prolong the service life of the battery module. The moderate width range makes the manufacturing and processing of the connecting piece 30 more controllable and easier. Manufacturers can use standard production processes and procedures to produce connecting pieces 30 that meet the requirements, thereby improving production efficiency and reducing costs. Space utilization: By adjusting the value of L6, the space layout inside the battery module can be optimized to improve space utilization. This helps to reduce the overall size and weight of the battery module, thereby improving its energy density and endurance. The appropriate length of the connecting piece 30 makes the installation process more convenient and fast, reducing the difficulty and cost of installation. At the same time, when the connecting piece 30 needs to be maintained or replaced, it is also more convenient to operate. Optionally, the value of L6 can be set to 4mm, 20mm, 44mm, etc.

[0049] In an embodiment, the extension length of the inner periphery of the barrier 40 along the width direction of the pole assembly 1 is L7, 2mm≤L7≤42mm. Such a wide width range enables the connecting piece 30 to adapt to various different pole assembly 1 size and layout requirements. In different application scenarios, the appropriate L7 value can be selected according to actual needs to achieve the best connection effect and performance. Within this width range, the connecting piece 30 can maintain sufficient structural strength to withstand various stresses and loads generated by the battery module during operation.

[0050] Further, the stable connection performance helps to ensure the safe operation of the battery module and prolong the service life. The moderate width range makes the manufacturing and processing of the connecting piece 30 more controllable and easier. Manufacturers can use standard production processes and procedures to produce connecting pieces 30 that meet the requirements, thereby improving production efficiency and reducing costs. Space utilization: By adjusting the value of L7, the space layout inside the battery module can be optimized to improve space utilization. This helps to reduce the overall size and weight of the battery module, thereby improving its energy density and endurance. The appropriate length of the connecting piece 30 makes the installation process more convenient and fast, reducing the difficulty and cost of installation. At the same time, when the connecting piece 30 needs to be maintained or replaced, it is also more convenient to operate. Optionally, the value of L7 can be set to 4mm, 20mm, 44mm, etc.

[0051] In an embodiment, the extension length of the barrier 40 along the height direction of the pole assembly 1 is L8, 0.1mm≤L8≤4mm. Such a wide height range allows the connecting piece 30 to adapt to various different pole assembly 1 size and layout requirements. In different application scenarios, the appropriate L8 value can be selected according to actual needs to achieve the best connection effect and performance. Within this height range, the connecting piece 30 can maintain sufficient structural strength to withstand various stresses and loads generated by the battery module during operation.

[0052] Further, the stable connection performance helps to ensure the safe operation of the battery module and prolong the service life. The moderate height range makes the manufacturing and processing of the connecting piece 30 more controllable and easier. Manufacturers can use standard production processes and procedures to produce connecting pieces 30 that meet the requirements, thereby improving production efficiency and reducing costs. Space utilization: By adjusting the value of L8, the space layout inside the battery module can be optimized to improve space utilization. This helps to reduce the overall size and weight of the battery module, thereby improving its energy density and endurance. The appropriate length of the connecting piece 30 makes the installation process more convenient and fast, reducing the difficulty and cost of installation. At the same time, when the connecting piece 30 needs to be maintained or replaced, it is also more convenient to operate. Optionally, the value of L8 can be set to 0.1mm, 2mm, 4mm, etc.

[0053] In an embodiment, the barrier 40 includes a ceramic pad. The above structure is simple, not only easy to install, but also can reduce the production cost of the device.

[0054] In an embodiment, the first cover 10, the second cover 20 and the connecting piece 30 are integrally formed. The above structure is simple, not only can reduce the production cost of the device, but also can improve the production efficiency of the assembly to realize the batch production of the assembly.

[0055] In a second aspect, the utility model discloses a top cover, and the top cover comprises the pole assembly 1.

[0056] The utility model discloses technical scheme, set up connecting piece 30 between first cover 10 and second cover 20, the first end of connecting piece 30 is connected with the end surface of first cover 10 relative to second cover 20, and the second end of connecting piece is connected with the end surface of second cover 20 relative to first cover 10, and first cover 10 and second cover 20 are electrically connected through connecting piece 30, so when the current of current loop is too big, connecting piece 30 can fuse, to make the electric connection between first cover 10 and second cover 20 disconnect, to cut off the circuit and protect the whole battery, and the pole assembly 1 has current overload protection function, thereby can improve the security when using battery.

[0057] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The relative arrangement of components and steps illustrated in the embodiments set forth in the examples is not limiting, unless otherwise specifically stated, and the numerical expressions and values set forth in the examples are not limiting on the scope of the present application. Also, it is to be understood that all examples shown and discussed in this specification are illustrative only and need not be to scale. As such, the exemplary embodiments can have different values for the components and steps depending upon the actual value chosen. It is intended that the specification and examples be considered as exemplary only, with the true scope of the application being indicated by the following claims.

[0058] In the description of the utility model, it is to be understood that the orientation words such as "front, back, top, bottom, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the orientation or position relation indicated by the orientation words are usually based on the orientation or position relation shown in the drawings, and these orientation words are only for facilitating the description of the utility model and simplifying the description, and under the circumstances that no opposite statement is made, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, so it can not be understood as the limitation on the protection scope of the utility model;The orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0059] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. Well, the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0060] In addition, it needs to be explained that the use of "first", "second" and the like words to limit the parts, only for the convenience of the corresponding parts for the distinction, such as no other declaration, the above words have no special meaning, therefore can not be understood as the restriction of the scope of protection of the utility model.

[0061] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. 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 pole assembly, characterized in that: The pole assembly comprises: a first cover; a second cover body, spaced apart from the first cover body; a connector disposed between the first cover and the second cover, wherein a first end of the connector is connected to an end surface of the first cover facing the second cover, and a second end of the connector is connected to an end surface of the second cover facing the first cover, and the first cover and the second cover are electrically connected via the connector; When the current carrying capacity of the pole assembly is too large, the connector may be melted to disconnect the first cover and the second cover.

2. The pole assembly according to claim 1, characterized in that The cross-sectional shape of the connecting piece along the length direction of the pole assembly is square, and the extending length of the connecting piece along the length direction of the pole assembly is L1, 0.1 mm≤L1≤70 mm.

3. The pole assembly according to claim 2, characterized in that An extension length of the connecting piece along the width direction of the pole assembly is L2, and 0.1 mm ≤ L2 ≤ 40 mm.

4. The pole assembly according to claim 2, characterized in that An extension length of the connecting piece along the height direction of the pole assembly is L3, and 0.1 mm ≤ L3 ≤ 4 mm.

5. The pole assembly according to any one of claims 1 to 4, characterized in that: The pole assembly further comprises: A barrier member is arranged between the first cover body and the second cover body, the first end of the barrier member is insulated and connected to the end face of the first cover body relative to the second cover body, the second end of the barrier member is insulated and connected to the end face of the second cover body relative to the first cover body, there is a gap between the barrier member and the connecting member, and the barrier member is arranged around the outer periphery of the connecting member along the circumference of the first cover body, and the gap is used to accommodate the connecting member after it is melted.

6. The pole assembly according to claim 5, characterized in that: An extension length of the outer periphery of the barrier member along the length direction of the pole assembly is L4, 4mm≤L4≤74mm.

7. The pole assembly according to claim 5, characterized in that: An extending length of the inner circumference of the barrier member along the length direction of the pole assembly is L5, 2mm≤L5≤72mm.

8. The pole assembly according to claim 5, characterized in that An extension length of the outer periphery of the barrier member along the width direction of the pole assembly is L6, 4mm≤L6≤44mm.

9. The pole assembly according to claim 5, characterized in that: An extending length of the inner circumference of the barrier member along the width direction of the pole assembly is L7, 2mm≤L7≤42mm.

10. The pole assembly according to claim 5, characterized in that The extending length of the barrier member along the height direction of the pole assembly is L8, and 0.1 mm≤L8≤4 mm.

11. The pole assembly according to claim 5, characterized in that The barrier comprises a ceramic pad.

12. The pole assembly according to claim 1, characterized in that The first cover body, the second cover body and the connecting member are an integrally formed structure.

13. A top cover, characterized in that: The top cover includes the pole assembly according to any one of claims 1 to 12.

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