Cover body assembly, battery and electronic equipment

Abstract

The utility model discloses a cover body assembly, a battery and electronic equipment. The cover body assembly comprises a cover plate and a cover cap, and the cover plate and the cover cap are in insulation connection. The cover plate is provided with a matching surface facing the cover cap, the edge of the cover plate protrudes out of the cover cap, the edge of the cover plate is concaved inwards in the position close to the matching surface to form a step structure, and the step structure is configured to be in positioning connection with a shell of a battery applied to the cover body assembly. When the cover body assembly provided by the embodiment of the utility model is applied to the battery, before the cover body assembly and the shell of the battery are assembled, the step structure and the shell of the battery are positioned and connected to ensure that the mounting position of the cover body assembly on the shell of the battery is accurate; and the positioning precision between the cover body assembly and the shell of the battery is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage devices, and more particularly, to a cover assembly, a battery, and an electronic device. BACKGROUND

[0002] With the rapid development of modern electronic technology, batteries, as key devices for energy storage and supply, are increasingly widely used in various electronic devices. In order to meet the performance requirements of different electronic devices, the structural design and manufacturing process of batteries are also being continuously optimized. Among them, the cover of the battery, as an important part of the battery, not only plays a sealing and protective role for the internal structure of the battery, but also bears the function of connecting with the external circuit.

[0003] The positioning accuracy is not high when the traditional battery cover and the battery shell are connected; therefore, it is necessary to propose a new technical scheme to solve the technical problem. UTILITY MODEL CONTENT

[0004] An object of the present application is to provide a new technical scheme of a cover assembly, a battery, and an electronic device.

[0005] According to a first aspect of the present application, a cover assembly is provided, comprising:

[0006] a cover plate and a cover cap, the cover plate and the cover cap being insulatively connected;

[0007] the cover plate has a mating surface arranged towards the cover cap, the edge of the cover plate is arranged protruding from the cover cap, and the edge of the cover plate is recessed to form a step structure near the mating surface, the step structure being configured to be positioned and connected with a shell of a battery to which the cover assembly is applied.

[0008] Optionally, the step structure is arranged in a ring shape around the central axis of the cover plate.

[0009] Optionally, the cover cap comprises a flat plate portion and a protruding portion connected with each other, and the cover plate is provided with a mating hole through the thickness direction thereof; the protruding portion is arranged to pass through the mating hole, and the flat plate portion is arranged opposite to the mating surface and is insulatively connected.

[0010] Optionally, along the thickness direction of the cover plate, the protruding portion is arranged protruding from the cover plate.

[0011] Optionally, the cover assembly further comprises an insulating layer, the insulating layer being arranged at least between the flat plate portion and the mating surface.

[0012] Optionally, the cover plate, the insulating layer, and the cover cap are connected in a hot-pressing composite manner.

[0013] According to a second aspect of the present application, a battery is provided, comprising the cover assembly according to the first aspect, and further comprising a shell having an opening portion, wherein the cover assembly covers the opening portion; the cover assembly is positioned and connected with the shell at the step structure, and the cover plate is welded with the shell.

[0014] Optionally, the maximum diameter of the cover plate is greater than the caliber of the opening portion and less than the diameter of the outer sidewall of the shell, the edge of the cover plate is located at the inner side of the outer sidewall of the shell, a gap portion is arranged between the edge of the cover plate and the outer sidewall of the shell, and the cover plate is welded with the shell at the gap portion.

[0015] Optionally, the cover plate is welded with the shell at the gap portion and forms a welding area, and the welding area is annular.

[0016] According to a third aspect of the present application, an electronic device is provided, comprising the battery according to the second aspect.

[0017] When the cover assembly provided by the embodiments of the present application is applied to a battery, the cover assembly is first positioned and connected with the shell of the battery by the step structure before the cover assembly is assembled with the shell of the battery, so as to ensure that the installation position of the cover assembly on the shell of the battery is accurate and correct, and the positioning accuracy between the cover assembly and the shell of the battery is improved. Moreover, since the step structure is arranged on the cover assembly, it is not necessary to arrange the step structure on the shell of the battery. Generally, the step structure is formed by stamping, and it is difficult to form the step structure on the shell of the battery by stamping. Therefore, arranging the step structure on the cover assembly is beneficial to reducing the processing difficulty of the battery, so as to reduce the production cost.

[0018] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the following drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings incorporated in and forming a part of the specification illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0020] Figure 1 is a sectional structure schematic diagram of a cover assembly according to an embodiment of the present application;

[0021] Figure 2a is an exploded structure schematic diagram of a battery according to an embodiment of the present application;

[0022] Figure 2b is a structure schematic diagram of a battery according to an embodiment of the present application Figure 1 ;

[0023] Figure 2c Fig. 2 is a structural schematic diagram of a battery according to an embodiment of the present application.

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 1, cover assembly; 11, cover plate; 110, matching hole; 111, matching surface; 112, free surface; 100, step structure; 12, cover cap; 121, flat plate part; 122, protruding part; 13, insulation layer; 2, shell; 200, gap part; 3, welding area. DETAILED DESCRIPTION

[0026] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps set forth in the examples, as well as the numerical expressions and values, are not limitations on the scope of the present application unless otherwise specifically stated.

[0027] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the scope of the application its application or uses.

[0028] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and devices can be viewed as part of the specification and can be claimed as such.

[0029] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as a limitation on the scope of the exemplary embodiments. Thus, other examples of the exemplary embodiments can have different values.

[0030] It should be noted that like reference numerals and letters in the various figures indicate similar items, and thus, once an item is defined in one figure, it is not necessary to discuss it further in subsequent figures.

[0031] SUMMARY Figure 1 As shown, according to an embodiment of the present application, a cover assembly 1 is provided, which includes a cover plate 11 and a cover cap 12, the cover plate 11 is connected with the cover cap 12 in an insulating manner;

[0032] The cover plate 11 has a matching surface 111 arranged towards the cover cap 12, the edge of the cover plate 11 is arranged protruding from the cover cap 12, and the edge of the cover plate 11 is recessed to form a step structure 100 near the matching surface 111, the step structure 100 is configured to be positioned and connected with the shell of a battery to which the cover assembly is applied.

[0033] In the cover assembly 1 provided in the embodiments of the present application, the cover plate 11 and the cover cap 12 are insulatedly connected, and the two can be respectively configured as a first pole and a second pole of a battery. For example, the cover plate 11 is connected with a shell of the battery as the first pole, and the cover cap 12 is the second pole; wherein the first pole can be a negative pole for example, and the second pole can be a positive pole for example.

[0034] In the cover assembly 1 provided in the embodiments of the present application, the edge of the cover plate 11 is arranged to protrude from the cover cap 12, that is, the edge of the cover plate 11 is located outside the edge of the cover cap 12, thereby facilitating the connection of the cover plate 11 with the shell of the battery.

[0035] Wherein, the cover plate 11 is insulatedly connected with the cover cap 12 at the fitting surface 111 thereof. Along the thickness direction of the cover plate 11, the step structure 100 is arranged close to the fitting surface 111; that is, the cover plate 11 has a free surface 112 arranged away from the fitting surface 111, and when the cover assembly 1 is assembled with the shell of the battery, the fitting surface 111 is arranged close to the inside of the shell, and the free surface 112 is arranged away from the inside of the shell.

[0036] The step structure 100 is formed in the edge of the cover plate 11, and the edge of the cover plate 11 is concave, that is, the edge of the cover plate 11 is recessed towards the central axis direction of the cover plate 11.

[0037] When the cover assembly 1 provided in the embodiments of the present application is applied to a battery, before the cover assembly 1 is assembled with the shell of the battery, the step structure 100 is first connected with the shell of the battery for positioning, so as to ensure the installation position of the cover assembly on the shell of the battery is accurate, and improve the positioning precision between the cover assembly 1 and the shell of the battery. Moreover, since the step structure 100 is arranged on the cover assembly 1, it is not necessary to arrange a step structure on the shell of the battery; generally, the step structure is formed by stamping, and it is difficult to form a step structure on the shell of the battery by stamping, so arranging the step structure on the cover assembly 1 is beneficial to reduce the processing difficulty of the battery, thereby reducing the production cost.

[0038] Referring to Figure 1 In one embodiment, the step structure 100 is arranged in a ring shape around the central axis of the cover plate 11.

[0039] In this specific example, the step structure 100 is a ring structure arranged in a whole circle around the central axis of the cover plate 11, so that not only the contact area between the cover assembly and the shell of the battery can be increased, and the stability of the connection can be enhanced, but also the positioning precision between the cover assembly 1 and the shell of the battery can be further improved.

[0040] Referring to Figure 1As shown in the figure, in one embodiment, the cap 12 comprises a flat plate portion 121 and a protruding portion 122 connected with each other, and the cover plate 11 is provided with a matching hole 110 through the thickness direction thereof; the protruding portion 122 is arranged in the matching hole 110, and the flat plate portion 121 is arranged opposite to the matching surface 111 and is connected with the matching surface 111 in an insulation manner.

[0041] In this specific example, the protruding portion 122 of the cap 12 is arranged in the matching hole 110 of the cover plate 11, and the flat plate portion 121 of the cap 12 is arranged opposite to the matching surface 111 of the cover plate 11 and is fixed together by an insulation connection manner, so as to realize the insulation connection between the cap 12 and the cover plate 11.

[0042] Referring to Figure 1 As shown in the figure, in one embodiment, the protruding portion 122 protrudes from the cover plate 11 along the thickness direction of the cover plate 11.

[0043] In this specific example, the protruding portion 122 of the cap 12 protrudes from the cover plate 11 along the thickness direction, so as to facilitate the electrical connection between the protruding portion 122 and the external equipment. Generally, in the battery to which the cover assembly 1 is applied, the cover plate 11 is connected with the shell of the battery as a first pole, and the cap 12 is connected as a second pole, wherein the first pole can be, for example, a negative pole, and the second pole can be, for example, a positive pole; the protruding portion 122 of the cap 12 is responsible for forming an electrical connection with the positive pole of the external equipment.

[0044] Referring to Figure 1 As shown in the figure, in one embodiment, the cover assembly 1 further comprises an insulation layer 13, which is arranged at least between the flat plate portion 121 and the matching surface 111.

[0045] In this specific example, in order to ensure the good insulation between the cover plate 11 and the cap 12, the insulation layer 13 is arranged between the flat plate portion 121 of the cap 12 and the matching surface 111 of the cover plate 11; the insulation layer 13 can be made of a plastic film, an insulation paper, a ceramic sheet or the like, so as to ensure the good insulation between the cover plate 11 and the cap 12. In addition, in the matching hole 110 of the cover plate 11, there is a gap between the protruding portion 122 of the cap 12 and the cover plate 11, and the insulation layer 13 can also be arranged in the gap, that is, the insulation layer 13 is also arranged between the cover plate 11 and the protruding portion 122, so as to further ensure the good insulation between the cover plate 11 and the cap 12.

[0046] Referring to Figure 1 As shown in the figure, in one embodiment, the cover plate 11, the insulation layer 13 and the cap 12 are connected in a hot-pressing manner.

[0047] In this specific example, the cover plate 11, the insulating layer 13 and the cover cap 12 are connected together by means of hot-pressing, which not only improves the connection stability, but also ensures the stability and reliability of the overall performance of the cover assembly.

[0048] Referring to Figures 2a to 2c According to another embodiment of the present application, a battery is provided, which comprises the cover assembly 1 as described above, and further comprises a shell 2 having an opening part, wherein the cover assembly 1 covers the opening part; the cover assembly 1 is positioned and connected with the shell 2 at the step structure 100, and the cover plate 11 is welded with the shell 2.

[0049] The battery provided by the embodiment of the present application comprises the cover assembly 1, which is positioned and connected with the shell 2 by means of the step structure 100 of the cover assembly 1, so as to achieve higher assembly precision. In addition, the step structure 100 is arranged on the cover assembly 1, so that the step structure does not need to be arranged on the shell 2, thereby facilitating the processing difficulty of the battery.

[0050] In the battery provided by the embodiment of the present application, the cover plate 11 is connected with the shell 2 as a first pole, and the cover cap 12 is connected as a second pole; for example, the first pole can be a negative pole, and the second pole can be a positive pole. The cover assembly 1 and the shell 2 enclose a containing space, and a winding core of the battery is arranged in the containing space. In the cover assembly 1, the fitting surface 111 of the cover plate 11 is located in the containing space, and the free surface 112 of the cover plate 11 is located outside the containing space; the flat plate part 121 of the cover cap 12 is located in the containing space, and the protruding part 122 of the cover cap 12 is partially located in the containing space and partially located outside the containing space.

[0051] Referring to Figures 2a to 2c As shown in the figure, in one embodiment, the maximum diameter of the cover plate 11 is greater than the caliber of the opening part and less than the diameter of the outer side wall of the shell 2, the edge of the cover plate 11 is located inside the outer side wall of the shell 2, a gap part 200 is arranged between the edge of the cover plate 11 and the outer side wall of the shell 2, and the cover plate 11 is welded with the shell 2 at the gap part 200.

[0052] In this specific example, further, the maximum diameter of the cover plate 11 is greater than the caliber of the opening part of the shell 2 and less than the diameter of the outer side wall of the shell 2; in this way, it can be ensured that the edge of the cover plate 11 can be connected with the outer side wall of the shell 2 and located inside the outer side wall of the shell 2, and a gap part 200 is formed between the edge of the cover plate 11 and the outer side wall of the shell 2, which facilitates the subsequent welding connection of the cover plate 11 and the shell 2.

[0053] Referring to Figures 2b to 2cAs shown, in one embodiment, the cover plate 11 is connected with the shell 2 at the gap portion 200 by welding and forms a welding area 3, which is annular.

[0054] In this specific example, the cover plate 11 is connected with the shell 2 at the gap portion 200 by laser welding, for example, and forms an annular welding area 3; this can improve the connection between the cover plate 11 and the shell 2 and ensure that the battery has good sealing performance.

[0055] According to still another embodiment of the present application, an electronic device is provided, which includes the battery as described above.

[0056] The above embodiments mainly describe the differences between the embodiments, and the different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory. For the sake of brevity, the combination will not be described herein.

[0057] Although some specific embodiments of the present application have been described in detail by examples, those skilled in the art should understand that the above examples are only for illustration and are not intended to limit the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A cap assembly, characterized by, The cover assembly comprises: a cover plate (11) and a cover cap (12), the cover plate (11) and the cover cap (12) being insulatively connected; the cover plate (11) has a matching surface (111) arranged towards the cover cap (12), the edge of the cover plate (11) is arranged protruding from the cover cap (12), and the edge of the cover plate (11) is recessed to form a step structure (100) near the matching surface (111), the step structure (100) being configured to be positioned and connected with the shell of the battery to which the cover assembly is applied.

2. The cover assembly of claim 1, wherein The step structure (100) is arranged in a ring shape around the central axis of the cover plate (11).

3. The cover assembly of claim 1, wherein The cover cap (12) comprises a flat plate part (121) and a protruding part (122) connected with each other, the cover plate (11) is provided with a matching hole (110) through the thickness direction thereof; the protruding part (122) is arranged in the matching hole (110), and the flat plate part (121) is arranged opposite to and insulatively connected with the matching surface (111).

4. The cover assembly of claim 3, wherein, In the thickness direction of the cover plate (11), the protruding part (122) is arranged protruding from the cover plate (11).

5. The cover assembly of claim 3, wherein The cover assembly further comprises an insulating layer (13) arranged at least between the flat plate part (121) and the matching surface (111).

6. The cover assembly of claim 5, wherein, The cover plate (11), the insulating layer (13) and the cover cap (12) are connected in a hot-pressing composite manner.

7. A battery, characterized by The battery comprises the cover assembly (1) according to any one of claims 1-6, further comprises a shell (2) having an opening part, the cover assembly (1) being arranged on the opening part; the cover assembly (1) is positioned and connected with the shell (2) at the step structure (100), and the cover plate (11) is welded with the shell (2).

8. The battery of claim 7, wherein, The maximum diameter of the cover plate (11) is greater than the caliber of the opening part and less than the diameter of the outer side wall of the shell (2), the edge of the cover plate (11) is located on the inner side of the outer side wall of the shell (2), and a gap part (200) is arranged between the edge of the cover plate (11) and the outer side wall of the shell (2), the cover plate (11) and the shell (2) being welded at the gap part (200).

9. The battery of claim 8, wherein, The cover plate (11) and the shell (2) are welded at the gap part (200) and form a welding area (3), the welding area (3) being in a ring shape.

10. An electronic device, comprising: The electronic device comprises the battery according to any one of claims 7-9.

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