CN211789111U

CN211789111U - Button cell seal structure and button cell

Info

Publication number: CN211789111U
Application number: CN202020912123.3U
Authority: CN
Inventors: 何伊; 曾玉祥
Original assignee: Zhuhai Cosmx Battery Co Ltd
Current assignee: Zhuhai Cosmx Battery Co Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-10-27
Anticipated expiration: 2030-05-26

Abstract

In order to prevent that outside air from getting into inside the battery, prevent inside electrolyte to outwards permeate simultaneously, provide a button cell seal structure and button cell, belong to battery technical field, the concrete scheme is as follows: a button battery sealing structure comprises a first shell, a second shell and a sealing ring, wherein the first shell and the second shell are both cylindrical structures with one ends opened, the second shell is sleeved inside the first shell to form a closed structure, and the sealing ring is arranged between the first shell and the second shell; be provided with the protruding I of the inward convex punctiform of a plurality of on the lateral wall of first casing, the utility model discloses inside can effectually preventing outside air entering battery, prevent inside electrolyte to permeate outward simultaneously, it is sealed effectual.

Description

Button cell seal structure and button cell

Technical Field

The utility model belongs to the technical field of the battery, concretely relates to button cell seal structure and button cell.

Background

Lithium batteries have the advantages of high energy, high battery voltage, wide operating temperature range, long storage life and small size, and have been widely used in military and civil small-sized electrical appliances. In the button cell production process, need press in upper cover, sealing washer in the lower cover that is equipped with electric core, in order to realize the sealed effect of upper cover and lower cover, all be interference fit between the three generally. The upper cover and the lower cover are formed by punching thin metal materials, and in order to ensure enough energy density, a gap between the internal battery cell and the lower cover is very small, so that the shell or the battery cell is extremely easy to damage in the assembling process.

Disclosure of Invention

The utility model discloses a first purpose is inside in order to prevent outside air entering battery, prevents inside electrolyte to outwards permeate simultaneously, the utility model provides a button cell seal structure.

The utility model discloses a second purpose provides a button cell who contains this seal structure.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a button battery sealing structure comprises a first shell, a second shell and a sealing ring, wherein the first shell and the second shell are both cylindrical structures with one ends opened, the second shell is sleeved inside the first shell to form a closed structure, and the sealing ring is arranged between the first shell and the second shell; the side wall of the first shell is provided with a plurality of inward convex point-shaped bulges I.

Further, the plurality of point-shaped protrusions I are circumferentially arranged around the side wall of the first shell.

Furthermore, an inward convex dot-shaped bulge II is arranged on the side wall of the second shell corresponding to the dot-shaped bulge I.

Furthermore, the sealing ring is connected with the first shell or the second shell in a sticking mode to form an integral structure.

Furthermore, the sealing ring comprises a cylindrical barrel and an annular flange, wherein both ends of the cylindrical barrel are of an open structure, the annular flange is arranged on the inner side wall of any one open end of the cylindrical barrel, the cylindrical barrel is arranged between the side walls of the first shell and the second shell, and the annular flange covers the upper surface of the open end of the second shell.

Furthermore, inward convex point-shaped bulges III are arranged on the sealing ring corresponding to the point-shaped bulges I.

Furthermore, the area of the bottom surface of each dot-shaped protrusion I is S, and S satisfies that S is more than 1 square millimeter and less than 25 square millimeters.

Further, the distance between the projection of the uppermost punctiform bulge I on the longitudinal section of the first shell and the projection of the lowermost punctiform bulge I on the longitudinal section of the first shell accounts for 30-60% of the height of the first shell.

Further, the bottom surface of the second shell is flush with the bottom surface of the first shell.

The button battery with the button battery sealing structure comprises a battery cell, wherein the battery cell is arranged inside a second shell, and the positive pole and the negative pole of the battery cell are respectively and electrically connected with a first shell and a second shell.

The utility model discloses beneficial effect for prior art is:

the button cell sealing structure of the utility model can effectively prevent external air from entering the inside of the cell and prevent internal electrolyte from permeating outwards, and has good sealing effect; the first shell and the second shell are simple in assembling process, and the phenomenon of poor assembling is reduced.

Drawings

Fig. 1 is a schematic cross-sectional view of a button cell according to a second embodiment before sealing;

fig. 2 is a schematic cross-sectional view of a button cell according to a second embodiment after sealing;

FIG. 3 is a schematic perspective view of a sealed button cell;

FIG. 4 is a front view of a button cell after sealing;

FIG. 5 is a schematic view of the cross-sectional structure A-A in FIG. 4;

in the figure, the shell comprises a first shell 1, a second shell 2, a second shell 3, a sealing ring 4, point-shaped bulges I and 5, point-shaped bulges II and 6, an electric core 7, point-shaped bulges III and 31, a cylindrical barrel 32 and an annular flange.

Detailed Description

The technical solution of the present invention is further described below with reference to the following detailed description and the accompanying drawings, but not limited thereto, and all modifications or equivalent substitutions made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention should be covered by the protection scope of the present invention.

Detailed description of the invention

A button battery sealing structure comprises a first shell 1, a second shell 2 and a sealing ring 3, wherein the first shell 1 and the second shell 2 are both cylindrical structures with one ends open, the opening directions of the first shell 1 and the second shell 2 are opposite, the second shell 2 is sleeved inside the first shell 1 to form a closed structure, and the sealing ring 3 is arranged between the first shell 1 and the second shell 2; the side wall of the first shell 1 is circumferentially provided with a plurality of inward convex point-shaped bulges I4.

Further, the sealing ring 3 comprises a cylindrical tube 31 and an annular flange 32, both ends of the cylindrical tube 31 are open, the annular flange 32 is disposed on the inner side wall of any one of the open ends of the cylindrical tube 31, and preferably, the cylindrical tube 31 and the annular flange 32 are an integral structure. The cylindrical barrel 31 is disposed between the side walls of the first casing 1 and the second casing 2, and the annular flange 32 covers the upper surface of the open end of the second casing 2. The sealing ring 3 is arranged to realize insulation between the first shell 1 and the second shell 2 and also has the effect of sealing the closed structure formed by the first shell 1 and the second shell 2, so that the electrolyte is effectively prevented from leaking outside and the normal use of the battery is influenced.

Preferably, the first shell 1 and the second shell 2 are both made of metal conductive materials, preferably zinc alloy, nickel alloy or stainless steel; the sealing ring 3 is made of elastic plastic, preferably ethylene propylene diene monomer.

Furthermore, the area of the bottom surface of each dot-shaped protrusion I4 is S, and S satisfies that S is more than 1 square millimeter and less than 25 square millimeters.

Further, the distance between the projection of the uppermost dotted protrusion i 4 on the longitudinal section of the first housing 1 and the projection of the lowermost dotted protrusion i 4 on the longitudinal section of the first housing 1 is 30% to 60% of the height of the first housing 1.

Further, the bottom surface of the second shell 2, the bottom surface of the diaphragm and the bottom surface of the first shell 1 are flush, and the side wall of the second shell 2 is completely wrapped inside the side wall of the first shell 1.

Furthermore, the longitudinal section of the point-shaped protrusion I4 is semicircular, square, triangular or other shapes.

Detailed description of the invention

The button battery with the button battery sealing structure comprises a battery cell 6, wherein the battery cell 6 is arranged inside a second shell 2, and one tab is respectively led out from a positive electrode and a negative electrode of the battery cell 6 and is electrically connected with a first shell 1 and the second shell 2 respectively.

Preferably, the battery core 6 is a winding core, and two tabs are respectively led out from two ends of the winding core, so that the anode and the cathode of the winding core are respectively welded with the first shell 1 and the second shell 2.

The assembling method of the button cell comprises the following steps: the battery core 6 is placed in the second shell 2, the sealing ring 3 is embedded in the outer side of the second shell 2, and the first shell 1 is wrapped at the outermost side. The side wall of the first shell 1 and the side wall of the second shell 2 are both not provided with projections.

An inward acting force F is applied to the outer side of the first shell 1 to deform the first shell to form a plurality of inward convex point-shaped bulges I4. First casing 1 can extrude among the deformation process sealing washer 3 makes it take place to deform, makes sealing washer 3 and first casing 1 and the close laminating of second casing 2 are in the same place, reach sealed effect, prevent inside outside air entering battery, prevent inside electrolyte outwards infiltration simultaneously. The opening end part of the first shell 1 is sealed by a plurality of point-shaped bulges I4 arranged in the circumferential direction.

Detailed description of the invention

The first embodiment differs from the first embodiment in that: inward convex point-like bulges II 5 are arranged at the positions, corresponding to the point-like bulges I4, on the side wall of the second shell 2, and the point-like bulges I4 and the point-like bulges II 5 are arranged in a one-to-one correspondence mode.

Furthermore, the longitudinal section of the point-shaped protrusion II 5 is semicircular, square, triangular or other shapes.

Preferably, the longitudinal section shapes of the dot-shaped protrusions I4 and the dot-shaped protrusions II 5 are the same.

Detailed description of the invention

The button battery with the button battery sealing structure according to the third embodiment comprises a battery cell 6, wherein the battery cell 6 is arranged inside a second shell 2, and one tab is respectively led out from a positive electrode and a negative electrode of the battery cell 6 and is electrically connected with a first shell 1 and the second shell 2.

The assembling method of the button cell comprises the following steps: as shown in fig. 1, the battery cell 6 is placed inside the second casing 2, the sealing ring 3 is embedded outside the second casing 2, and the first casing 1 is wrapped at the outermost side. The side wall of the second shell 2 is circumferentially provided with a plurality of point-like protrusions II 5, and the side wall of the first shell 1 is not provided with protrusions.

As shown in fig. 2, an inward acting force F is applied to the outer side of the first shell 1 to deform the first shell to form a plurality of point-like protrusions i 4, the point-like protrusions i 4 and the point-like protrusions ii 5 are arranged in a one-to-one correspondence manner, and the sealing ring 3 is extruded to deform during the deformation of the first shell 1, so that the sealing ring 3 is tightly attached to the first shell 1 and the second shell 2, thereby achieving the sealing effect, preventing external air from entering the battery and preventing internal electrolyte from permeating outwards; the structural schematic diagram of the assembled button cell is shown in fig. 3.

Detailed description of the invention

The first embodiment differs from the first embodiment in that: inward convex point-shaped bulges III 7 are arranged on the sealing ring 3 at positions corresponding to the point-shaped bulges I4, and the point-shaped bulges I4 and the point-shaped bulges III 7 are arranged in a one-to-one correspondence mode.

Furthermore, the longitudinal section of the punctiform protrusions III 7 is semicircular, square, triangular or other shapes.

Preferably, the longitudinal section shapes of the dot-shaped protrusions I4, the dot-shaped protrusions II 5 and the dot-shaped protrusions III 7 are the same.

Detailed description of the invention

The button battery with the button battery sealing structure according to the fifth embodiment comprises a battery cell 6, wherein the battery cell 6 is arranged inside a second shell 2, and one tab is respectively led out from a positive electrode and a negative electrode of the battery cell 6 and is electrically connected with a first shell 1 and the second shell 2.

The assembling method of the button cell comprises the following steps: the battery core 6 is placed in the second shell 2, the sealing ring 3 is embedded in the outer side of the second shell 2, and the first shell 1 is wrapped at the outermost side. The lateral wall of the first shell 1 and the lateral wall of the second shell 2 are both not provided with protrusions, and a plurality of dot-shaped protrusions III 7 are arranged in the circumferential direction of the sealing ring 3.

An inward acting force F is applied to the outer side of the first shell 1 to deform the first shell to form a plurality of inward convex point-shaped bulges I4. A plurality of protruding I4 of point form and the protruding III 7 one-to-one setting of a plurality of point form, first casing 1 can further extrude at the deformation in-process the protruding III 7 of point form on the sealing washer 3 makes sealing washer 3 and first casing 1 and the close laminating of second casing 2 are in the same place, reach sealed effect, prevent inside outside air admission battery, prevent inside electrolyte outwards to permeate simultaneously. The opening end of the first shell 1 is processed by dispensing or necking.

Detailed description of the invention

The first embodiment differs from the first embodiment in that: the sealing ring 3 is adhered and connected with the inner side wall of the first shell 1 or the outer side wall of the second shell 2 to form an integral structure, and the structure shortens the assembling process steps of the button cell.

Claims

1. The utility model provides a button cell seal structure which characterized in that: the sealing device comprises a first shell (1), a second shell (2) and a sealing ring (3), wherein the first shell (1) and the second shell (2) are both cylindrical structures with one open ends, the second shell (2) is sleeved in the first shell (1) to form a closed structure, and the sealing ring (3) is arranged between the first shell (1) and the second shell (2); the side wall of the first shell (1) is provided with a plurality of inward convex point-shaped bulges I (4).

2. The button cell sealing structure according to claim 1, wherein: the plurality of point-like protrusions I (4) are circumferentially arranged around the side wall of the first shell (1).

3. A button cell sealing structure according to claim 1 or 2, characterized in that: and an inward convex dot-shaped bulge II (5) is arranged on the side wall of the second shell (2) corresponding to the dot-shaped bulge I (4).

4. The button cell sealing structure according to claim 1, wherein: the sealing ring (3) is connected with the first shell (1) or the second shell (2) in a sticking mode to form an integral structure.

5. A button cell sealing structure according to claim 1 or 4, characterized in that: the sealing ring (3) comprises a cylindrical barrel (31) and an annular flange (32), both ends of the cylindrical barrel (31) are of an open structure, the annular flange (32) is arranged on the inner side wall of any one open end of the cylindrical barrel (31), the cylindrical barrel (31) is arranged between the side walls of the first shell (1) and the second shell (2), and the annular flange (32) covers the upper surface of the open end of the second shell (2).

6. The button cell sealing structure according to claim 1, wherein: and an inward convex dot-shaped bulge III (7) is arranged on the sealing ring (3) at a position corresponding to the dot-shaped bulge I (4).

7. The button cell sealing structure according to claim 1, wherein: the area of the bottom surface of each dot-shaped protrusion I (4) is S, and S satisfies that S is more than 1 square millimeter and less than 25 square millimeters.

8. The button cell sealing structure according to claim 1, wherein: the distance between the projection of the uppermost punctiform bulge I (4) on the longitudinal section of the first shell (1) and the projection of the lowermost punctiform bulge I (4) on the longitudinal section of the first shell (1) accounts for 30-60% of the height of the first shell (1).

9. The button cell sealing structure according to claim 1, wherein: the bottom surface of the second shell (2) is flush with the bottom surface of the first shell (1).

10. A button cell comprising a button cell sealing structure according to any of claims 1 to 9, wherein: the battery cell comprises a battery cell (6), wherein the battery cell (6) is arranged inside a second shell (2), and the positive pole and the negative pole of the battery cell (6) are respectively electrically connected with a first shell (1) and the second shell (2).