CN218300166U

CN218300166U - Battery and electronic equipment

Info

Publication number: CN218300166U
Application number: CN202222211044.1U
Authority: CN
Inventors: 杨昆仑; 陈志勇
Original assignee: Jiangxi Weidian New Energy Co Ltd
Current assignee: Jiangxi Weidian New Energy Co Ltd
Priority date: 2022-08-22
Filing date: 2022-08-22
Publication date: 2023-01-13
Anticipated expiration: 2032-08-22

Abstract

The application discloses a battery and an electronic device. The battery comprises a shell, a center pillar, a winding core, a first tab and a second tab, wherein the shell comprises a shell and a cover plate, and the shell is provided with a bottom wall and an opening part which are oppositely arranged along a first direction; the cover plate covers the opening part of the shell, and the shell and the cover plate enclose to form an accommodating cavity; the middle column is provided with a top surface and a bottom surface which are arranged in a back-to-back manner along a first direction, the top surface is positioned outside the accommodating cavity, the bottom surface is positioned in the accommodating cavity, and a gap is formed between the bottom surface and the bottom wall; the shell and the center column are arranged in an insulating way; the winding core is positioned in the accommodating cavity and is arranged around the central column; the first tab is led out from one side of the winding core close to the bottom wall and connected with the bottom surface of the central column, and the first tab is insulated from the shell; the second pole ear is led out from one side of the winding core close to the bottom wall and is connected with the shell.

Description

Battery and electronic equipment

Technical Field

The present application relates to the field of energy storage devices, and more particularly, to a battery and an electronic apparatus.

Background

In recent years, with the development of science and technology, various electronic products are required for life of people. The capacity of the battery as a power source of electronic products is one of important indexes for measuring the quality of the electronic products.

Therefore, how to improve the battery structure in the prior art to improve the utilization rate of the internal space of the battery is a technical problem which is generally concerned in the industry.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a new technical scheme of battery and electronic equipment.

According to a first aspect of the present application, there is provided a battery comprising:

the shell comprises a shell body and a cover plate, wherein the shell body is provided with a bottom wall and an opening part which are oppositely arranged along a first direction; the cover plate is covered on the opening part of the shell, and the shell and the cover plate enclose to form an accommodating cavity;

the middle column is provided with a top surface and a bottom surface which are arranged in a first direction in an opposite mode, the top surface is located outside the accommodating cavity, the bottom surface is located in the accommodating cavity, and a gap is formed between the bottom surface and the bottom wall;

the shell is insulated from the center pillar;

the winding core is positioned in the accommodating cavity and is arranged around the central column;

the first tab is led out from one side, close to the bottom wall, of the winding core and connected with the bottom surface of the central column, and the first tab and the shell are arranged in an insulating mode;

and the second pole lug is led out from one side of the winding core close to the bottom wall and is connected with the shell.

Optionally, the bottom surface is provided with a first protruding point, and the first tab is connected with the bottom surface through projection welding.

Optionally, the shell has a side wall disposed around the bottom wall, and the second pole ear is led out through a side of the winding core close to the bottom wall and connected with the side wall.

Optionally, the side wall is provided with a second protruding point, and the second tab is connected with the side wall by projection welding.

Optionally, the cross section of the first tab is L-shaped, and the cross section of the second tab is U-shaped.

Optionally, a cross section where the central axis of the central pillar is located and the side wall have a first intersecting line and a second intersecting line, the leading-out position of the first tab is close to the first intersecting line, and the connecting position of the second tab and the side wall is close to the second intersecting line.

Optionally, along the first direction, the position that the first tab is led out from the winding core does not exceed half of the height of the winding core and/or the position that the second tab is led out from the winding core does not exceed half of the height of the winding core.

Optionally, the battery further comprises an insulating gummed paper, the insulating gummed paper is arranged in the accommodating cavity, and the insulating gummed paper is connected with the bottom wall.

Optionally, the battery further comprises an annular insulator sleeved outside the center pillar for isolating the cover plate from the center pillar.

According to a second aspect of the present application, there is provided an electronic device comprising a battery as described in the first aspect.

According to the battery provided by the embodiment of the application, firstly, the first pole ear is led out through one side, close to the bottom wall, of the winding core, and the second pole ear is also led out through one side, close to the bottom wall, of the winding core; that is, the first tab and the second tab are led out from the same side of the winding core, that is, the leading-out sides of the first tab and the second tab are the same, so that only a certain space is reserved on the leading-out side for leading out the first tab and the second tab, and the space for leading out the tabs is not required to be reserved at other positions, so that the utilization rate of the space in the accommodating cavity can be improved. Secondly, in the battery provided by the embodiment of the application, the central pillar occupying the space in the accommodating cavity is not only used as a support, but is used as one pole of the battery, so that the space in the accommodating cavity of the battery is fully utilized, and the capacity of the battery is effectively increased.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic structural diagram of a battery according to an embodiment of the present application;

FIG. 2 is a schematic diagram of the structure of a housing in a battery according to one embodiment of the present application;

fig. 3 is a schematic structural view of a center pillar in a battery according to an embodiment of the present application.

Description of the reference numerals:

1. a housing; 11. a bottom wall; 12. a side wall; 121. a first intersection line; 122. a second intersecting line; 2. a cover plate; 21. a projection; 3. a center pillar; 301. a top surface; 302. a bottom surface; 31. a small diameter section; 32. a coarse diameter section; 4. a winding core; 5. a first tab; 6. a second tab; 7. insulating gummed paper; 8. an insulating member.

Detailed Description

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, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

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

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

Referring to fig. 1-3, according to one embodiment of the present application, a battery is provided. The battery comprises a shell, wherein the shell comprises a shell 1 and a cover plate 2, and the shell 1 is provided with a bottom wall 11 and an opening part which are oppositely arranged along a first direction; the cover plate 2 is arranged at the opening part of the shell 1 in a covering manner, and the shell 1 and the cover plate 2 enclose to form an accommodating cavity; the middle pillar 3 is provided with a top surface 301 and a bottom surface 302 which are arranged oppositely along a first direction, the top surface 301 is positioned outside the accommodating cavity, the bottom surface 302 is positioned in the accommodating cavity, and a gap is formed between the bottom surface 302 and the bottom wall 11; the outer shell is insulated from the center pillar 3; the winding core 4 is positioned in the accommodating cavity, and the winding core 4 is arranged around the central column 3; the first tab 5 is led out from one side of the winding core 4 close to the bottom wall 11 and connected with the bottom surface 302 of the center pillar 3, and the first tab 5 is insulated from the shell; the second tab 6 is led out through the winding core 4 on the side close to the bottom wall 11 and connected to the case 1.

The battery provided by the embodiment of the application can be a button battery, for example. In the battery provided by the embodiment of the application, firstly, the first tab 5 is led out through the side of the winding core 4 close to the bottom wall 11, and the second tab 6 is also led out through the side of the winding core 4 close to the bottom wall 11; that is, the first tab 5 and the second tab 6 are led out through the same side of the winding core 4, that is, the leading-out sides of the first tab 5 and the second tab 6 are the same, so that only a certain space needs to be reserved on the leading-out side for leading out the first tab 5 and the second tab 6, and the space for leading out the tabs does not need to be reserved at other positions, so that the utilization rate of the space in the accommodating cavity can be improved.

Secondly, in the battery provided in the embodiment of the present application, the central pillar 3 occupying the space in the accommodating cavity no longer serves as a support, but the central pillar 3 serves as one pole of the battery, for example, the first tab 5 is a positive electrode tab, and the second tab 6 is a negative electrode tab; the center pillar 3 serves as the positive electrode of the battery and, correspondingly, the outer case serves as the negative electrode of the battery. The top surface 301 of the center pillar 3 is exposed outside the accommodating cavity, and the top surface 301 is led out as the positive electrode of the battery, so that the space of the accommodating cavity of the battery is fully utilized, and the capacity of the battery is effectively increased. More specifically, the housing 1, the cover plate 2 and the center pillar 3 are made of metal conductive materials.

The first direction is a central axis direction of the center pillar 3.

Further, a through hole is opened in the cover plate 2, and the top surface 301 of the center pillar 3 is exposed to the outside of the accommodating chamber through the through hole.

In one embodiment, the bottom surface 302 is provided with a first protruding point, and the first tab 5 is connected with the bottom surface 302 by projection welding.

In this specific example, the first salient point is arranged on the bottom surface 302 of the center pillar 3, and the first tab 5 is connected with the bottom surface 302 by projection welding, so that not only is the connection between the first tab 5 and the bottom surface 302 very stable and reliable, but also the first salient point is contacted during welding, so that the pressure and current density per unit area are improved, and the production efficiency is improved.

Referring to fig. 1 and 2, in one embodiment, the housing 1 has a side wall 12 disposed around the bottom wall 11, and the second tab 6 is led out through a side of the winding core 4 close to the bottom wall 11 and connected to the side wall 12.

In this particular example, the second tab 6 is led out of the winding core 4 and then connected to the side wall 12 of the housing 1, which is advantageous in that the second tab 6 is located away from the first tab 5, so that the first tab 5 and the second tab 6 have less mutual interference.

In one embodiment, the sidewall 12 is provided with a second bump, and the second tab 6 is connected with the sidewall 12 by projection welding.

In this specific example, the second bumps are disposed on the side wall 12, and the second tab 6 is connected to the side wall 12 by projection welding, so that not only is the connection between the second tab 6 and the side wall 12 very stable and reliable, but also the second bumps are contacted during welding, so that the pressure and current density per unit area are increased, and the production efficiency is improved.

Referring to fig. 1, in one embodiment, the first tab 5 has an L-shaped cross section, and the second tab 6 has a U-shaped cross section.

In this specific example, the first tab 5 is formed to have an L-shaped cross section, and the first tab 5 is easily connected to the bottom surface 302 of the center pillar 3 after being drawn out from the winding core 4; the second tab 6 is formed in a U-shaped cross section, and the second tab 6 is easily connected to the side wall 12 of the case 1 after being drawn out from the winding core 4.

Referring to fig. 1 and 2, in one embodiment, a cross section of the center axis of the center pillar 3 and the side wall 12 has a first intersection line 121 and a second intersection line 122, the first tab 5 is drawn near the first intersection line 121, and the second tab 6 is connected to the side wall 12 near the second intersection line 122.

At the cross section where the center axis of the center pillar 3 is located, the first intersection line 121 and the second intersection line 122 are symmetrically disposed about the center axis of the center pillar 3. In this specific example, the lead-out position of the first tab 5 is made close to the first intersection line 121, and the position where the second tab 6 is connected to the side wall 12 is made close to the second intersection line 122, so that the first tab 5 is far from the second tab 6, and the mutual interference between the first tab 5 and the second tab 6 is small.

In one embodiment, in the first direction, the first tab 5 is not more than half the height of the winding core 4 from the winding core 4 and/or the second tab 6 is not more than half the height of the winding core 4 from the winding core 4.

For example, the layer of the core 4 closest to the bottom wall 11 is referred to as the first layer, and the second, third, 8230, nth layers, in that order, are disposed away from the bottom wall 11 in the first direction; then, the first tab 5 and/or the second tab 6 is/are led out from the first layer or the second layer of the winding core 4, so that the first tab 5 and/or the second tab 6 is/are led out from the winding core 4 at a position relatively close to the bottom wall 11, and thus the first tab 5 and/or the second tab 6 are/is arranged relatively short for easy lead-out.

Referring to fig. 1, in one embodiment, the battery further includes an insulating adhesive tape 7, the insulating adhesive tape 7 is disposed in the accommodating cavity, and the insulating adhesive tape 7 is connected to the bottom wall 11.

In this specific example, the provision of the adhesive paper 7 can ensure the insulation between the first tab 5 and the housing 1, thereby preventing short circuit.

Referring to fig. 1, in one embodiment, the battery further includes an annular insulator 8, and the insulator 8 is sleeved outside the center pillar 3 to isolate the cover plate 2 from the center pillar 3.

In this specific example, the annular insulator 8 can ensure the insulation between the center pillar 3 and the cover plate 2, thereby preventing short circuit. An annular insulator 8 surrounds the post 3 to ensure that the post 3 is fully isolated from the cover 2 and no contact occurs. Alternatively, the insulating member 8 is made of ceramic or glass having high strength and insulation.

Alternatively, as shown in fig. 1, a through hole is formed in the cover plate 2, and the top surface 301 of the center pillar 3 is exposed out of the accommodating cavity through the through hole; an annular projection 21 is arranged on the cover plate 2 around the through hole and facing the receiving chamber, an annular recess is arranged on the side wall of the insulating part 8, and the projection 21 and the recess are connected in a matching manner. The matching connection of the convex part 21 and the concave part can facilitate the positioning and installation between the insulating part 8 and the cover plate 2, and the insulating part 8 and the cover plate 2 can be connected more tightly and firmly, so that the loosening of the insulating part 8 and the cover plate 2 during the collision and the shaking of the battery can be avoided.

Alternatively, referring to fig. 1 and 3, the center pillar 3 is divided into a small diameter section 31 and a large diameter section 32 along an axial direction (i.e., a first direction), wherein the diameter of the small diameter section 31 is smaller than that of the large diameter section 32, the insulator 8 is sleeved outside the small diameter section 31, and the side wall of the insulator 8 is flush with the side wall of the large diameter section 32.

The outermost layer of the battery structure that this application embodiment provided only round casing 1, the battery increases in the space that utilizes on the horizontal width, and battery capacity obtains improving.

According to another embodiment of the present application, there is provided an electronic device including the battery as described above.

In the above embodiments, the differences between the embodiments are described in emphasis, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in consideration of brevity of the text.

Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications can be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims

1. A battery, comprising:

the shell comprises a shell body (1) and a cover plate (2), wherein the shell body (1) is provided with a bottom wall (11) and an opening part which are oppositely arranged along a first direction; the cover plate (2) is arranged at the opening part of the shell (1) in a covering manner, and the shell (1) and the cover plate (2) enclose to form an accommodating cavity;

the middle pillar (3) is provided with a top surface (301) and a bottom surface (302) which are arranged in a first direction in an opposite mode, the top surface (301) is located outside the accommodating cavity, the bottom surface (302) is located inside the accommodating cavity, and a gap is formed between the bottom surface (302) and the bottom wall (11);

the shell and the center pillar (3) are arranged in an insulating way;

the winding core (4), the winding core (4) is positioned in the containing cavity, and the winding core (4) is arranged around the central column (3);

the first tab (5) is led out from one side, close to the bottom wall (11), of the winding core (4) and connected with the bottom surface (302) of the center pillar (3), and the first tab (5) is arranged in an insulating mode with the shell;

and the second lug (6) is led out from one side, close to the bottom wall (11), of the winding core (4) and is connected with the shell (1).

2. The battery according to claim 1, characterized in that the bottom surface (302) is provided with a first elevation, and the first tab (5) is projection welded to the bottom surface (302).

3. The cell according to claim 1, characterised in that the housing (1) has a side wall (12) arranged around the bottom wall (11), the second pole lug (6) being led out via the side of the winding core (4) close to the bottom wall (11) and being connected to the side wall (12).

4. The battery according to claim 3, characterized in that the side wall (12) is provided with a second elevation, and a projection welding connection is provided between the second tab (6) and the side wall (12).

5. The battery according to claim 1, wherein the first tab (5) is L-shaped in cross section and the second tab (6) is U-shaped in cross section.

6. The battery according to claim 3, wherein the cross section of the central axis of the central pillar (3) and the side wall (12) has a first intersection line (121) and a second intersection line (122), the first tab (5) is led out near the first intersection line (121), and the second tab (6) is connected to the side wall (12) near the second intersection line (122).

7. The battery according to claim 1, characterized in that in the first direction the first tab (5) is led from the winding core (4) at a position not exceeding half the height of the winding core (4) and/or the second tab (6) is led from the winding core (4) at a position not exceeding half the height of the winding core (4).

8. The battery according to claim 1, further comprising an insulating adhesive tape (7), wherein the insulating adhesive tape (7) is disposed in the accommodating cavity, and the insulating adhesive tape (7) is connected to the bottom wall (11).

9. The battery according to claim 1, further comprising an annular insulator (8), wherein the insulator (8) is sleeved outside the center pillar (3) to isolate the cover plate (2) from the center pillar (3).

10. An electronic device, characterized in that the electronic device comprises a battery according to any of claims 1-9.