CN216928723U

CN216928723U - Shell structure with inner flange and battery

Info

Publication number: CN216928723U
Application number: CN202220521539.1U
Authority: CN
Inventors: 邸彦苹; 宾术; 黎莉; 戈志敏; 王乾; 马熙
Original assignee: Huizhou Ganfeng Lithium Technology Co ltd
Current assignee: Huizhou Ganfeng Lithium Technology Co ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-07-08
Anticipated expiration: 2032-03-11

Abstract

The utility model provides a shell structure with an inner flange. The shell structure comprises a first cover body, a frame body and a second cover body, wherein the frame body is formed by enclosing a plurality of side walls with grooves on the inner sides, the first cover body and the second cover body are respectively covered on the two opposite sides of the frame body, the grooves are used for plugging the openings on the two sides of the frame body, the frame body and the cover body form an accommodating cavity in an enclosed space, and the accommodating cavity is used for accommodating the pole piece. The shell structure with the inner flange solves the problem that the depth of an original shell cannot be greatly limited by adopting the design of the frame body and the two cover bodies, so that the application range of the shell is wider, the thickness of the second cover body can be independently designed, the capacity is further improved, the frame body is provided with the inward flange perpendicular to the side wall, the production difficulty is reduced, or the cover body is provided with the flange perpendicular to the plane, and the production difficulty is reduced. In addition, a battery adopting the shell structure is also provided.

Description

Shell structure with inner flange and battery

Technical Field

The utility model relates to the technical field of lithium ion batteries, in particular to a shell structure with an inner flange and a battery adopting the shell structure with the inner flange.

Background

The lithium ion battery has the advantages of high energy density, long cycle life, environmental friendliness, no memory effect and the like, and is widely applied to mobile communication or digital products such as mobile phones, portable computers, digital cameras, portable music playing devices and the like. With the rapid development of the recent electronic equipment update, people put forward higher requirements on the cruising ability of the lithium ion battery, when the performances of an internal cell material platform, the capacity and the like are improved to a certain degree, starting from a battery packaging shell, the technology of reducing the volume of the packaging shell to strive for more space for an internal cell becomes an effective technical means for improving the capacity, and the reliability of cell packaging and the consistency of cell size can be improved, but the existing lithium ion battery packaging shell needs to be strengthened in the aspects.

For example, referring to fig. 1-2, publication No. 109817849a discloses a package and a battery, the package comprises a first case 1, a second case 2, the first case 1 comprises a top 15 and a first side wall 13 having a first flange 12 extending outwardly, the first side wall 13 defines an opening 11; the second shell 2 comprises a middle portion 22 and a second flange 21 extending outwards from the middle portion 22, the middle portion 22 is used for covering the opening 11, the second flange 21 is used for being in contact with the first flange 12 and performing welding sealing, the widths of the first flange 12 and the second flange 21 are both 0.3mm-0.7mm, at the moment, the flanges are welded and sealed along the periphery of the shell, the battery energy utilization space is occupied, and the capacity cannot be improved better.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a case structure having an inner flange and a battery using the case structure having the inner flange. Compared with the problem that the width of a contact flange between the first shell and the second shell occupies the size of a battery and influences the capacity of the battery in the prior art, the shell structure with the inner flange can eliminate or reduce the width of the first flange and the width of the second flange, so that the problem that the space of the battery is occupied by the flange is solved, and the capacity of the battery is further improved. Meanwhile, the first shell is divided into the frame body and the cover body, so that the production cost of the shell is reduced, the problem of stamping depth is solved, and the frame body or the cover body is provided with the inner flange structure, so that the difficulty in assembling the shell is reduced.

The utility model provides a shell structure with an inner flange, which comprises a first cover body, a frame body and a second cover body, wherein the frame body is formed by enclosing a plurality of side walls, the first cover body and the second cover body are respectively arranged on two opposite sides of the frame body in a covering mode and used for plugging openings on two sides of the frame body, the openings on two ends of the frame body are provided with flanges which extend inwards to form two sides perpendicular to the side walls, or at least one edge of the first cover body and the second cover body is provided with a flange perpendicular to a plane, the first cover body and the second cover body are connected through the flange and the frame body, a closed space formed by enclosing the first cover body, the frame body and the second cover body forms an accommodating cavity, the accommodating cavity is used for accommodating a pole core, and the pole core is connected with one side wall.

Furthermore, the edge of the first cover body extends downwards to form the flange, the edge of the second cover body extends upwards to form the flange, and the frame body is connected with the two flanges on the first cover body and the second cover body.

Furthermore, the width of the flange is 0.001-2 mm.

Furthermore, a fusion connection area is formed at the opening of the first cover body, the second cover body and the frame body, and the fusion connection area is used for sealing the opening.

Further, the side wall is formed by bending a metal sheet or punching and forming a cylindrical base material.

Furthermore, the cross-sectional height range of the shell structure formed by enclosing the first cover body, the frame body and the second cover body is 1.0-100 mm, the thickness ranges of the first cover body and the second cover body are 40-300 μm, and the thickness range of the frame body is 40-500 μm.

Furthermore, the frame body is enclosed by four side walls to form, wherein two side walls are wide walls, the other two side walls are narrow walls, the two side walls are arranged oppositely, the narrow walls are located between the two wide walls, and the side portions of the first cover body and the second cover body extend out of the side portions of the wide walls by 0-0.3 mm.

Further, the pole core is composed of one or more single pole cores, and the pole core is manufactured by at least one of single pole lug winding, middle pole lug winding, multi-pole lug winding or lamination.

Furthermore, the frame body with the utmost point core links to each other the lateral wall be equipped with annotate liquid hole, first utmost point post, and with first utmost point post or the connection piece opposite in polarity, annotate the downthehole sealed nail that is equipped with of liquid, first utmost point post second utmost point post or the connection piece all with utmost point core is connected.

Furthermore, the utility model also provides a battery comprising a housing structure with an internal flange as described in any one of the above.

The shell structure with the inner flange and the battery adopting the shell structure with the inner flange comprise a first cover body, a frame body and a second cover body, the problem that the depth of an original shell cannot be greatly limited is solved by adopting the design of the frame body and the two cover bodies, the application range of the shell is wider, the thickness of the second cover body can be independently designed, the capacity is further improved, in addition, the frame body is provided with a flange which is inwards and perpendicular to the side wall, the production difficulty is reduced, or the cover body is provided with a flange which is perpendicular to the plane, and the production difficulty is reduced.

Drawings

The utility model is further illustrated by the following figures and examples.

FIG. 1 is a schematic perspective view of a conventional package;

FIG. 2 is a schematic view showing the fitting relationship between a first flange and a second flange of a conventional package;

FIG. 3 is an exploded view of one embodiment of a housing structure;

FIG. 4 is a schematic perspective view of an embodiment of a housing structure;

FIG. 5 is a schematic perspective view of another embodiment of a housing structure;

FIG. 6 is a schematic perspective view of a frame of an embodiment of a housing structure;

FIG. 7 is an exploded view of another embodiment of a housing structure;

FIG. 8 is a schematic view of the first cover and the second cover of the present invention;

FIG. 9 is a diagram illustrating a relationship between a first cover, a frame, and a second cover according to an embodiment;

FIG. 10 is a schematic view of a first cover, a frame, and a second cover according to another embodiment;

FIG. 11 is a diagram illustrating a relationship between a first cover, a frame, and a second cover according to an embodiment;

FIG. 12 is a diagram illustrating a relationship between a first cover, a frame, and a second cover according to an embodiment;

FIG. 13 is a diagram illustrating a relationship between a first cover, a frame, and a second cover according to an embodiment;

FIG. 14 is a diagram illustrating a relationship between a first cover, a frame, and a second cover according to an embodiment;

FIG. 15 is a diagram illustrating a relationship between a first cover, a frame, and a second cover according to an embodiment;

FIG. 16 is a diagram illustrating a relationship between a first cover, a frame, and a second cover according to an embodiment;

FIG. 17 is a diagram illustrating a relationship between a first cover, a frame, and a second cover according to an embodiment;

FIG. 18 is a diagram illustrating a relationship between a first cover, a frame, and a second cover according to an embodiment;

FIG. 19 is a schematic view of a first cover, a frame, and a second cover according to another embodiment;

fig. 20 is a schematic view illustrating a fitting relationship between the first cover, the frame, and the second cover according to still another embodiment.

The reference numbers in the drawings are as follows:

the explosion-proof valve comprises a first cover body 1, a first pole column 201, an explosion-proof valve 101, a frame body 2, a second pole column 202, a flange 210, a second cover body 3, a liquid injection hole 203, a pole core 4 and a connecting sheet 204.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 3-20, the present invention provides a housing structure with an inner flange and a battery using the housing structure, where the housing structure includes a first cover 1, a frame 2, and a second cover 3, the frame is formed by enclosing a plurality of side walls, the first cover and the second cover are respectively disposed at the grooves on two opposite sides of the frame and used for blocking the openings on two sides of the frame, the openings on two ends of the frame extend inward to form flanges 210 with two sides perpendicular to the side walls, or at least one edge of the first cover and the second cover is formed with a flange 210 perpendicular to a plane, the first cover and the second cover are connected to the frame through the flanges, a closed space enclosed by the first cover, the frame, and the second cover forms an accommodation cavity for accommodating a pole piece 4, the pole piece is connected to one of the sidewalls.

In one embodiment, the flange is formed by extending downward from the edge of the first cover, the flange is formed by extending upward from the edge of the second cover, and the frame is connected to the two flanges on the first cover and the second cover.

In one embodiment, the width of the flange is 0.001 to 2 mm.

In one embodiment, the first cover, the second cover edge and the opening of the frame form a fusion joint region, and the fusion joint region is used for sealing the opening.

In one embodiment, the side wall is formed by bending a metal sheet or by stamping from a cylindrical base material.

The height range of the cross section of a shell structure formed by enclosing the first cover body, the frame body and the second cover body is 1.0-100 mm, the thickness range of the first cover body and the second cover body is 40-300 mu m, and the thickness range of the frame body is 40-500 mu m.

In one embodiment, the frame body is formed by enclosing four side walls, two of the side walls are wide walls, the other two side walls are narrow walls, the two side walls are arranged oppositely, the narrow walls are located between the two wide walls, and the side portions of the first cover body and the second cover body extend out of the side portions of the wide walls by 0-0.3 mm.

In one embodiment, the sidewall of the frame 2 connected to the pole core 4 is provided with a liquid injection hole 203, a first pole column 201, and a second pole column 202 or a connecting sheet 204 with opposite polarity to the first pole column, the liquid injection hole is provided with a sealing nail, and the first pole column, the second pole column or the connecting sheet are all connected to the pole core.

In one embodiment, the pole core is comprised of one or more single pole cores made by at least one of single pole lug winding, center lug winding, multi-lug winding, or lamination.

In one embodiment, the first cover is provided with a circular arc shaped explosion proof valve 101.

In one embodiment, the material of the first cover, the frame body and the second cover is made of stainless steel, aluminum or other metal materials.

Specifically, referring to fig. 3 to 14, the housing structure and the battery using the same provided by the present invention include the first cover, the frame, and the second cover.

Firstly, overlapping and connecting the edge of the second cover body with the inner flange 210 of the frame body to form an accommodating cavity; the frame body comprises the side wall, the first pole column, a second pole column or a connecting sheet with opposite polarity to the first pole column and a liquid injection hole.

And secondly, connecting the pole core with the accommodating cavity formed in the first step and placing the pole core in the accommodating cavity.

And thirdly, overlapping and connecting the first cover body and the inner flange 210 of the frame body to form a closed shell only with a liquid injection hole.

For example, referring to fig. 3 to 8 and fig. 15 to 20, the present invention provides a housing structure with an inner flange and a battery using the same, where the housing includes the first cover, the frame and the second cover.

Covering the opening of the frame body with the second cover body, wherein an upward flange of the second cover body is overlapped and connected with the frame body to form an accommodating cavity; the frame body comprises the side wall, the first pole column, a second pole column or a connecting sheet with opposite polarity to the first pole column and a liquid injection hole.

And thirdly, covering the opening of the frame body with the first cover body, wherein the upward flange 210 of the first cover body is overlapped and connected with the frame body to form a closed shell body only with a liquid injection hole.

The above examples only express embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A shell structure with an inner flange is characterized in that: the shell structure comprises a first cover body, a frame body and a second cover body, wherein the frame body is formed by enclosing a plurality of side walls, the first cover body and the second cover body are respectively covered on two opposite sides of the frame body and used for blocking openings on two sides of the frame body, openings at two ends of the frame body extend inwards to form flanges of two sides perpendicular to the side walls, or at least one edge of the first cover body and the second cover body is formed with a flange perpendicular to a plane, the first cover body and the second cover body are connected through the flanges and the frame body, a closed space formed by enclosing the first cover body, the frame body and the second cover body forms an accommodating cavity, the accommodating cavity is used for accommodating a pole piece, and the pole piece is connected with one side wall.

2. A housing structure having an inner flange according to claim 1, wherein: the edge of the first cover body extends downwards to form the flange, the edge of the second cover body extends upwards to form the flange, and the frame body is connected with the two flanges on the first cover body and the second cover body.

3. A housing structure with an internal flange according to claim 2, characterized in that: the width of the flange is 0.001-2 mm.

4. A housing structure having an inner flange according to claim 3, wherein: the first cover body, the second cover body edge and the opening of the frame body form a fusion connection area, and the fusion connection area is used for sealing the opening.

5. A housing structure having an inner flange according to claim 1, wherein: the side wall is formed by bending a metal sheet or punching and forming a cylindrical base material.

6. A housing structure having an inner flange according to claim 1, wherein: the height range of the cross section of a shell structure formed by enclosing the first cover body, the frame body and the second cover body is 1.0-100 mm, the thickness range of the first cover body and the second cover body is 40-300 mu m, and the thickness range of the frame body is 40-500 mu m.

7. A housing structure having an inner flange according to claim 1, wherein: the frame body is enclosed by four lateral walls and closes and forms, and wherein two lateral walls are the broad wall, and two other lateral walls are the narrow wall, two liang of relative settings, the narrow wall is located two between the broad wall, the lateral part of first lid with the second lid stretches out 0 ~ 0.3mm of the lateral part of broad wall.

8. A housing structure having an inner flange according to claim 1, wherein: the pole core is composed of one or more single pole cores and is manufactured by at least one of single pole lug winding, middle pole lug winding, multi-pole lug winding or lamination.

9. A housing structure having an inner flange according to claim 1, wherein: the frame body with the utmost point core links to each other the lateral wall be equipped with annotate liquid hole, first utmost point post, and with first utmost point post opposite second utmost point post or connection piece, annotate the downthehole sealed nail that is equipped with of liquid, first utmost point post second utmost point post or the connection piece all with the utmost point core is connected.

10. A battery, characterized by: the battery includes a housing structure having an internal flange as claimed in any one of claims 1 to 9.