CN112599834B

CN112599834B - Battery with a battery cell

Info

Publication number: CN112599834B
Application number: CN202011403361.2A
Authority: CN
Inventors: 杨昆仑; 陈志勇
Original assignee: Guangdong Mic Power New Energy Co Ltd
Current assignee: Guangdong Mic Power New Energy Co Ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2022-08-23
Anticipated expiration: 2040-12-04
Also published as: CN112599834A

Abstract

The present disclosure discloses a battery. The battery is provided with a first pole and a second pole and comprises a shell and a center post, wherein the shell is internally provided with a containing cavity; a part of the center pillar is disposed in the accommodating chamber, and another part of the center pillar is exposed outside the accommodating chamber; the center pillar is configured as a first pole of the battery and the housing is configured as a second pole of the battery; the shell and the center pillar are arranged in an insulating mode.

Description

Battery with a battery cell

Technical Field

The present disclosure relates to the field of energy storage devices, and more particularly, to a battery.

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, which is used as a power source of the electronic product, is one of the important indexes for measuring the quality of the electronic product. In the prior art, in the structure of the button cell, the central column structure occupies a part of the space inside the cell, but the central column is only used as a support for supporting the upper and lower shells, which results in the reduction of the utilization rate of the space inside the cell, thereby limiting the capacity of the cell.

In view of the above, a new technical solution is needed to solve the above technical problems.

Disclosure of Invention

An object of the present disclosure is to provide a new technical solution of a battery.

According to a first aspect of the present disclosure, there is provided a battery having a first pole and a second pole, the battery comprising:

a housing having a receiving cavity therein;

a center pillar, a portion of which is disposed in the accommodating chamber and another portion of which is exposed outside the accommodating chamber;

the center pillar is configured as a first pole of the battery and the housing is configured as a second pole of the battery;

the shell and the center pillar are arranged in an insulating mode.

Optionally, the first pole is a positive pole and the second pole is a negative pole.

Optionally, the outer shell includes a shell and a cover plate, the cover plate is connected to one end of the shell along a first direction, and the first direction is an axial direction of the center pillar; the shell and the cover plate enclose to form the accommodating cavity; the cover plate has a through hole through which a first end of the center pillar is exposed to the outside of the cover plate.

Optionally, the first end of the center pillar protrudes from the cover plate, and an annular insulating layer is disposed on the cover plate and surrounds the first end of the center pillar.

Optionally, the battery includes an annular insulator sleeved outside the center pillar, and the insulator is disposed at the through hole to isolate the cover plate from the center pillar.

Optionally, the insulator is disposed flush with the cover plate.

Optionally, the center pillar is axially divided into a first section and a second section from the first end, the diameter of the first section is smaller than that of the second section, and the insulator is sleeved on the first section.

Optionally, the side wall of the insulating member is provided with an annular first recess, the cover plate is provided with an annular first protrusion toward the accommodating cavity, and the first protrusion is in matching connection with the first recess.

Optionally, the center pillar is sequentially divided into a first section, a second section and a third section from the first end along the axial direction, the diameter of the first section and the diameter of the third section are both larger than the diameter of the second section, and the insulator is sleeved on the first section and the second section.

Optionally, the insulator and the center pillar are integrally formed.

Optionally, one of the insulating member and the center pillar is provided with a second protruding portion, and the other one of the insulating member and the center pillar is provided with a second recessed portion, and the second protruding portion is in matching connection with the second recessed portion.

According to one embodiment of the present disclosure, a battery is provided, which uses a center pillar disposed in a housing cavity of a housing as a first pole of the battery, wherein a part of the center pillar is exposed outside the housing from the housing cavity, and the exposed structure is led out as the first pole of the battery, so that the space of the housing cavity inside the battery housing is fully utilized, thereby effectively increasing the capacity of the battery.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

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

Fig. 1 is a schematic diagram one of the structure of a battery according to one embodiment of the present disclosure;

FIG. 2 is a schematic diagram II of a battery according to one embodiment of the present disclosure;

fig. 3 is a schematic diagram three of the structure of a battery according to one embodiment of the present disclosure;

fig. 4 is a schematic diagram of a structure of a battery according to an embodiment of the present disclosure.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure 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 disclosure, 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, further discussion thereof is not required in subsequent figures.

Referring to fig. 1-4, a battery is provided according to one embodiment of the present disclosure. The battery is provided with a first pole and a second pole and comprises a shell and a center pillar 11, and a containing cavity is formed in the shell; a part of the center pillar 11 is disposed in the accommodating cavity, and another part of the center pillar 11 is exposed outside the accommodating cavity; the center pillar 11 is configured as a first pole of the battery, and the case is configured as a second pole of the battery; the housing is insulated from the center pillar 11.

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, the center pillar 11 occupying the inner space of the housing is no longer used only as a support, but the center pillar 11 arranged in the housing cavity is used as the first pole of the battery, part of the structure of the center pillar 11 is exposed outside the housing from the housing cavity, and the exposed structure is led out as the first pole of the battery, so that the space of the housing cavity inside the housing of the battery is fully utilized, and the capacity of the battery is effectively increased. More specifically, the center pillar 11 and the outer shell are made of a metal conductive material.

In one embodiment, further, the first pole is a positive pole and the second pole is a negative pole.

In this particular example, the center pillar 11 is specifically the positive electrode of the battery, and correspondingly, the outer case is the negative electrode of the battery. It can be understood that, in the accommodating cavity, the battery core provided with the battery is wound around the center pillar 11, the positive electrode of the battery core is connected with one end of the positive electrode tab, and the other end of the positive electrode tab is connected with the center pillar 11; the negative pole of electricity core is connected with the one end of negative pole utmost point ear, and the other end and the shell of negative pole utmost point ear are connected. Thereby, the center pillar 11 is used as the positive electrode of the battery, and the outer shell is used as the negative electrode of the battery.

Referring to fig. 1 to 4, in one embodiment, the housing further includes a housing 12 and a cover plate 13, wherein the cover plate 13 is connected to one end of the housing 12 along a first direction, which is an axial direction of the center pillar 11; the housing 12 and the cover plate 13 enclose to form the accommodating cavity; the cover plate 13 has a through hole through which a first end of the center pillar 11 is exposed to the outside of the cover plate 13.

In this specific example, the housing is specifically composed of a case 12 and a cover plate 13, the case 12 is a cylindrical structure with one end being a closed end and the other end having an opening, the center pillar 11 and the battery cell are placed into the case 12 through the opening, and the cover plate 13 covers the opening of the case 12, so that the case 12 and the cover plate 13 enclose the accommodating cavity. The direction from the opening part to the closed end of the shell 12 is the axial direction of the center pillar 11, a through hole is arranged on the cover plate 13, and the first end of the center pillar 11 is exposed out of the accommodating cavity from the through hole; an insulating adhesive paper is arranged between the bottom of the center pillar 11 away from the cover plate 13 (i.e. the other end opposite to the first end of the center pillar 11) and the inner bottom surface of the shell 12 for insulating the center pillar 11 and the shell 12. Alternatively, the side wall and/or the bottom of the center pillar 11 may be used for connecting the positive electrode tab, and particularly, a welded connection or a conductive adhesive bonding may be used. Further specifically, casing 12 and apron 13 adopt the welding mode to connect, and the welded position is apron 13 border structure and the opening department border structure of casing 12, can set up a stair structure in the opening department of casing 12, and stair structure at first fixes a position with apron 13, then welds, and sealed effect is better like this to easy to operate during the welding. Meanwhile, the welding can be performed downwards from the cover plate 13, and can also be performed inwards from the side wall of the shell 12.

Referring to fig. 2, in one embodiment, further, a first end of the center pillar 11 protrudes from the cover plate 13, and an annular insulating layer is disposed on the cover plate 13 around the first end of the center pillar 11.

In order to prevent the short circuit between the center pillar 11 and the outer shell, a ring-shaped insulating layer, which may be an insulating adhesive paper, is disposed on the cover plate 13 around the first end of the center pillar 11 exposed to the outside, and the first end of the center pillar 11 protrudes from the cover plate 13 by a thickness corresponding to the thickness of the ring-shaped insulating layer, so that the outer surface of the entire cover plate 13 has a flat structure after the ring-shaped insulating layer is disposed on the cover plate 13.

In one embodiment, the battery further includes an annular insulator 14, the insulator 14 is sleeved outside the center pillar 11, and the insulator is disposed at the through hole to isolate the cover plate 13 from the center pillar 11.

In this specific example, the center pillar 11 is insulated from the cover plate 13 by providing an annular insulating member 14 to prevent the center pillar 11 from contacting the cover plate 13 at the through hole to cause a short circuit. An annular insulator 14 surrounds the studs 11 at the through holes to ensure that the studs 11 are fully isolated from the cover 13 and no contact occurs. Alternatively, the insulating member 14 is made of ceramic or glass having high strength and insulation.

In one embodiment, further, the insulating member 14 is disposed flush with the cover plate 13.

Referring to fig. 2, the upper surface of the insulating member 14 is flush with the upper surface of the cap plate 13 to ensure that the outer surface of the entire battery at the cap plate assumes a flat configuration.

In one embodiment, the center pillar 11 is axially divided into a first section and a second section from the first end, the diameter of the first section is smaller than that of the second section, and the insulator 14 is sleeved on the first section.

Referring to fig. 2, in this specific example, the center pillar 11 has a cross section in the axial direction thereof in a "convex" shape, the insulator 14 is fitted around the outside of the first section of the center pillar 11 having a smaller diameter, and the outer side wall of the insulator 14 is flush with the outer side wall of the second section of the center pillar 11 having a larger diameter. Therefore, the space in the accommodating cavity cannot be additionally occupied due to the arrangement of the insulating part 14, so that a larger space is provided for the battery core of the battery, and the capacity of the battery is increased.

In one embodiment, further, the side wall of the insulating member 14 is provided with an annular first concave portion, and the cover plate 13 is provided with an annular first convex portion 131 facing the accommodating cavity, and the first convex portion 131 is in matching connection with the first concave portion.

In this specific example, the matching connection between the first protrusion 131 and the first recess can facilitate the positioning and installation of the insulating member 14 and the cover plate 13, and the insulating member 14 and the cover plate 13 can be connected more tightly and firmly, so as to avoid the loosening of the insulating member 14 and the cover plate 13 when the battery collides and shakes.

In one embodiment, the center pillar 11 is sequentially divided into a first section, a second section and a third section from the first end along the axial direction, the diameter of the first section and the diameter of the third section are both larger than the diameter of the second section, and the insulator 14 is sleeved on the first section and the second section.

Referring to fig. 3, in this specific example, the center pillar 11 exhibits an "i" shaped cross section in the axial direction thereof, and the center pillar 11 in this embodiment increases the area of the first end exposed outside the receiving chamber, that is, the weldable area of the first end of the center pillar 11, so as to lead the first pole of the battery out of the first end of the center pillar 11, compared to the center pillar structure in which the cross section of fig. 2 exhibits a "convex" shape.

In one embodiment, the insulator 14 is integrally formed with the center pillar 11.

Alternatively, the insulator 14 may be integrally formed with the center pillar 11 by nano-injection molding, so that the insulator 14 and the center pillar 11 are simply formed and connected tightly and firmly, and are not easily loosened.

In one embodiment, one of the insulator 14 and the center pillar 11 is provided with a second protrusion, and the other is provided with a second recess, and the second protrusion is connected with the second recess in a matching manner.

Referring to fig. 4, in this specific example, an annular second concave portion is provided at an end portion of the insulating member 14 far from the cover plate 13, while an annular second convex portion 111 is provided at a middle portion of the center pillar 11, and the second convex portion 111 is fittingly connected with the second concave portion to facilitate the fitting positioning of the insulating member 14 and the center pillar 11.

The outermost layer of the battery structure provided by the embodiment of the application only has the circle of shell 12, the utilization space of the battery on the transverse width is increased, and the battery capacity is improved.

In the above embodiments, the differences between the embodiments are described with emphasis, and different optimization features between the embodiments may be combined to form a better embodiment as long as the differences are not contradictory, and in consideration of the brevity of the text, no further description is given here.

Although some specific embodiments of the present disclosure 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 disclosure. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A battery having a first pole and a second pole, the battery comprising:

a housing having a receiving cavity therein;

a center pillar (11), a portion of the center pillar (11) being disposed in the accommodating chamber, and another portion of the center pillar (11) being exposed outside the accommodating chamber;

the center pillar (11) is configured as a first pole of the battery, and the outer shell is configured as a second pole of the battery;

the shell is insulated from the center pillar (11);

the shell comprises a shell body (12) and a cover plate (13), wherein the cover plate (13) is connected to one end of the shell body (12) along a first direction, and the first direction is the axial direction of the center pillar (11); the shell (12) and the cover plate (13) enclose to form the accommodating cavity; the cover plate (13) has a through hole through which a first end of the center pillar (11) is exposed to the outside of the cover plate (13); the battery comprises an annular insulating piece (14), the insulating piece (14) is sleeved outside the center pillar (11), and the insulating piece is arranged at the through hole to isolate the cover plate (13) from the center pillar (11);

the side wall of the insulating part (14) is provided with an annular first concave part, the cover plate (13) is provided with an annular first convex part (131) facing the accommodating cavity, the first convex part (131) is connected with the first concave part in a matching way, and the first convex part (131) is flush with the outer side wall of the insulating part (14); the insulating piece (14) and the center pillar (11) are integrally formed; one of the insulating piece (14) and the center pillar (11) is provided with a second convex part, the other one is provided with a second concave part, and the second convex part is connected with the second concave part in a matching way;

the middle column (11) is divided into a first section and a second section from the first end along the axial direction, the diameter of the first section is smaller than that of the second section, the insulating part (14) is sleeved on the first section, and the outer side wall of the insulating part (14) is flush with the outer side wall of the second section of the middle column (11);

alternatively, the first and second electrodes may be,

the middle column (11) is sequentially divided into a first section, a second section and a third section from the first end along the axial direction, the diameter of the first section and the diameter of the third section are both larger than that of the second section, the insulating part (14) is sleeved on the first section and the second section, and the outer side wall of the insulating part (14) is flush with the outer side wall of the third section of the middle column (11).

2. The battery of claim 1, wherein the first pole is a positive pole and the second pole is a negative pole.

3. The battery according to claim 1, wherein the first end of the center pillar (11) is disposed to protrude from the cap plate (13), and an annular insulating layer is disposed on the cap plate (13) around the first end of the center pillar (11).

4. The battery according to claim 1, characterized in that the insulator (14) is arranged flush with the cover plate (13).