CN217589146U

CN217589146U - Shell structure and battery

Info

Publication number: CN217589146U
Application number: CN202220521636.0U
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: 2022-10-14
Anticipated expiration: 2032-03-11

Abstract

The utility model provides a shell structure. 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, the frame body and a closed space formed by enclosing the cover body form an accommodating cavity, the accommodating cavity is used for accommodating a pole piece, and the pole piece is connected with one side wall. The utility model discloses a shell structure has solved the unable big restriction of doing of former casing degree of depth through the design that adopts the framework to add two lids, makes casing application scope wider, and the second lid can design thickness alone, further promotes the capacity. In addition, a battery adopting the shell structure is also provided.

Description

Shell structure and battery

Technical Field

The utility model relates to a lithium ion battery technical field especially relates to a shell structure and adopt this shell structure's battery.

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 housing 1 and a second housing 2, the first housing 1 comprises a top 15 and a first sidewall 13 having a first flange 12 extending outwardly, the first sidewall 13 encloses an opening 11; the second casing 2 comprises a middle part 22 and a second flange 21 extending outwards from the middle part 22, the middle part 22 is used for covering the opening 11, the second flange 21 is used for contacting with the first flange 12 and performing welding sealing, the width of each of the first flange 12 and the second flange 21 is 0.3mm-0.7mm, and at this time, the flanges are welded and sealed along the periphery of the casing, so that the space for exerting energy of the battery 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 and a battery using the case structure. Compare and occupy the battery size in contact flange width between current first casing and the second casing, influence the battery capacity problem, the utility model discloses a shell structure can eliminate or reduce first flange and second flange width to solve the battery space and occupied the problem by the flange, further promote battery capacity.

The utility model provides a shell structure, shell structure includes first lid, framework and second lid, the framework is enclosed to close by a plurality of lateral walls and forms, first lid with the second lid is covered respectively and is located the relative both sides of framework just are used for the shutoff the opening of framework both sides, first lid the framework and the enclosure space that the lid encloses to close and forms holds the chamber, it is used for holding the utmost point core to hold the chamber, utmost point core is connected with one of them lateral wall.

Furthermore, a fusion connection area is formed between the edge of the first cover body and the edge of the second cover body and the cross section of the opening of the frame body, and the fusion connection area seals the opening.

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, and the narrow walls are located between the two wide walls.

Further, the side parts of the first cover body and the second cover body extend out of the side parts of the wide walls by 0-0.3 mm.

Furthermore, two opposite side surfaces of the first cover body and the second cover body are positioned on the same horizontal plane with the side surface of the wide wall.

Furthermore, a protrusion is convexly arranged on the inner surface of each wide wall, and a first groove for installing the first cover body and a second groove for installing the second cover body are formed between the protrusion and the wide walls.

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 opposite polarity's second utmost point post or connection piece, annotate the downthehole sealed nail that is equipped with, first utmost point post, second utmost point post or connection piece all with the utmost point core is connected.

Furthermore, a circular arc-shaped explosion-proof valve is arranged on the first cover body.

Further, the 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 range of the first cover body and the second cover body is 40-300 μm, and the thickness range of the frame body is 125-500 μm.

Furthermore, the utility model discloses still provide a battery, the battery includes as above any one shell structure.

The utility model discloses a shell structure and adopt this shell structure's battery, including first lid, framework and second lid, first lid and second lid edge form the melting joining region with framework opening part cross-section, the sealed opening of melting joining region. The utility model discloses a shell structure and adopt this shell structure's battery through the design that adopts the framework to add two lids, has solved the unable big restriction of doing of former casing degree of depth, makes casing application scope wider, but second lid independent design thickness, further promotes the capacity.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is a schematic perspective view of a conventional housing structure;

FIG. 2 is a cross-sectional view from a perspective of the housing structure shown in FIG. 1;

FIG. 3 is an exploded view of the housing structure of the present invention;

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

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

FIG. 6 is a diagram illustrating a relationship between a first cover, a frame, and a second cover according to an embodiment;

FIG. 7 is a schematic view of a first cover, a frame, and a second cover according to another embodiment;

fig. 8 is a schematic diagram illustrating a relationship between the first cover, the frame, and the second cover according to yet another embodiment.

The reference numbers in the drawings are as follows:

first cover body 1, frame body 2, second cover body 3 and pole core 4

Connecting sheet 204 for injection hole 203 of first pole column 201 and second pole column 202

Explosion-proof valve 101

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more 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. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

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 invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 3-5, the present invention provides a housing structure and a battery using the same, 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 covered on two opposite sides of the frame and are used for plugging openings on two sides of the frame, a containing cavity is formed in a closed space formed by enclosing the first cover, the frame and the cover, the containing cavity is used for containing a pole piece 4, and the pole piece is connected to one of the side walls.

In one embodiment, the first cover body and the second cover body are provided with a fusion connection area at the opening section of the frame body, and the fusion connection area is used for sealing the opening.

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, and the narrow walls are located between the two wide walls.

Referring to fig. 6, in one embodiment, the side portions of the first cover and the second cover extend 0-0.3 mm beyond the side portion of the wide wall.

Referring to fig. 7, in one embodiment, two opposite side surfaces of the first cover and the second cover are located on the same horizontal plane as the side surface of the wide wall.

Referring to fig. 8, 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 in a pairwise opposite manner, the narrow walls are located between the two wide walls, a protrusion is convexly arranged on the inner surface of each wide wall, and a first groove for mounting the first cover body and a second groove for mounting the second cover body are formed between the protrusions and the wide walls.

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 first cover is provided with a circular arc shaped explosion proof valve 101.

Specifically, in the case structure provided by the present invention, in the first step, the second cover body is covered on the opening of the frame body and connected to form an accommodating cavity; the frame body comprises the side wall, the first pole, a second pole with the polarity opposite to that of the first pole and a liquid injection hole. And in the second step, the pole core is connected with the accommodating cavity formed in the first step and is arranged in the accommodating cavity. Third, the first lid is attached to the opening of the frame (fig. 6 and 7), and a sealed case having only the liquid inlet is formed (fig. 5).

For example, in the case structure provided by the present invention, in the first step, the second cover is covered on the opening of the frame and connected to form an accommodating cavity; the frame body comprises the side wall, the first pole, a connecting sheet with polarity opposite to that of the first pole 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. Third, the first lid is attached to the opening of the frame (fig. 6 and 7), and a sealed case having only a liquid inlet is formed (fig. 4).

For example, in the case structure provided by the present invention, in the first step, the second cover body is covered on the opening of the frame body and connected to form an accommodating chamber; the frame body comprises the side wall, the first pole, a second pole with the polarity opposite to that of the first pole and a liquid injection hole. And in the second step, the pole core is connected with the accommodating cavity formed in the first step and is arranged in the accommodating cavity. Third, the first lid is attached to the opening of the frame (fig. 8), and a sealed case having only a liquid inlet is formed (fig. 5).

For example, in the case structure provided by the present invention, in the first step, the second cover is covered on the opening of the frame and connected to form an accommodating cavity; the frame body comprises the side wall, the first pole, a connecting sheet with the polarity opposite to that of the first pole 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. Third, the first lid is attached to the opening of the frame (fig. 8), and a sealed case having only a liquid inlet is formed (fig. 5).

In one embodiment, the first cover and the second cover are each a flat planar extension, and the side wall is formed by bending a metal sheet or by molding a cylindrical base material.

It is understood that the materials of the first cover, the frame body and the second cover can be stainless steel, aluminum or other metal materials.

In one embodiment, a height of a case structure surrounded by the first cover, the frame, and the second cover is in a range of 1.0 to 100mm.

In one embodiment, the first cover and the second cover have a thickness ranging from 40 to 300 μm, and the frame has a thickness ranging from 125 to 500 μm.

The utility model discloses a shell structure and adopt this shell structure's battery, including first lid, framework and second lid, first lid and second lid edge and framework opening part cross-section form the melting joining region, the sealed opening of melting joining region. The utility model discloses a shell structure and adopt this shell structure's battery through the design that adopts the framework to add two lids, has solved the unable big restriction of doing of former casing degree of depth, makes casing application scope wider, but second lid independent design thickness, further promotes the capacity.

The above embodiments only express the 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 those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A shell structure, 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 arranged on two opposite sides of the frame body in a covering manner and used for plugging openings on two sides of the frame body, a closed space formed by enclosing the first cover body, the frame body and the 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; the first cover body and the second cover body form a fusion connection area with the cross section of the opening of the frame body, and the fusion connection area seals the opening.

2. The housing structure of claim 1, wherein: 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 opposite to each other, and the narrow walls are located between the two wide walls.

3. The housing structure of claim 2, wherein: the side parts of the first cover body and the second cover body extend out of the side parts of the wide walls by 0-0.3 mm.

4. A housing structure according to claim 3, wherein: the two opposite side surfaces of the first cover body and the second cover body are positioned on the same horizontal plane with the side surface of the wide wall.

5. The housing structure of claim 4, wherein: the inner surface of each wide wall is convexly provided with a bulge, and a first groove for installing the first cover body and a second groove for installing the second cover body are formed between the bulges and the wide walls.

6. The housing structure of claim 5, 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.

7. The housing structure of claim 6, wherein: and the first cover body is provided with an arc-shaped explosion-proof valve.

8. The housing structure of claim 1, wherein: the height range 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 125-500 mu m.

9. A battery, characterized by: the battery comprises a housing structure according to any one of claims 1-8.