CN219086096U

CN219086096U - Tightly packaged button cell

Info

Publication number: CN219086096U
Application number: CN202320190949.7U
Authority: CN
Inventors: 周攀; 陈航
Original assignee: Luhua Zhifu Electronics Shenzhen Co ltd
Current assignee: Luhua Zhifu Electronics Shenzhen Co ltd
Priority date: 2023-02-02
Filing date: 2023-02-02
Publication date: 2023-05-26
Anticipated expiration: 2033-02-02

Abstract

The utility model provides a tightly packaged button cell, which comprises a shell, an upper cover and a sealing ring, wherein the shell and the upper cover are cylindrical, one ends of the cylindrical are open, the upper cover is positioned in the shell, the openings of the upper cover and the shell face opposite directions, and the sealing ring is connected between the upper cover and the shell. The upper cover comprises a cover plate, side walls, connecting walls and connecting pipes, wherein the cover plate, the side walls, the connecting walls and the connecting pipes are sequentially connected, the side walls are tubular, the connecting walls are tubular, the outer diameter of the connecting walls is gradually reduced along the direction from the connecting pipes to the side walls, and the connecting walls and the connecting pipes form steps. The opening border of shell inwards buckles and forms the kink of awl tooth form, and the kink sets up relatively with the linking wall, and the kink sets up the effect that can play to collude with the cooperation of linking wall, and the kink is more than three, and all kinks are along the opening border evenly distributed of shell, and when processing, all kinks one shot forming, the roll-pressing angle of all kinks is unanimous, and the difficult relative displacement that takes place of shell and upper cover, upper cover and shell encapsulation are inseparable.

Description

Tightly packaged button cell

Technical Field

The utility model relates to the technical field of batteries, in particular to a tightly packaged button battery.

Background

In the prior art, the sealing mode of the shell of the button cell is a curling process, and after the curling process, the edge of the shell is inwards bent for one circle or is locally inwards curled. The shell is bent inwards for a circle, which is not beneficial to manufacturing, and the hemming process has high requirements. The local inward rolling is needed to be rolled in multiple sections, and the rolling angles are unevenly distributed every time when the multiple sections are curled, so that the structural stability is not strong, the shell and the upper cover are easy to relatively displace, the tightness is poor, the battery leakage phenomenon exists, and the battery performance is further damaged.

Disclosure of Invention

The utility model provides a tightly packaged button cell, which can solve the problem of poor tightness of the button cell.

The technical scheme of the utility model is as follows: the utility model provides a tightly packaged button cell, which comprises a shell, an upper cover and a sealing ring, wherein the shell and the upper cover are both cylindrical, one end of each cylindrical is open, the upper cover is positioned in the shell, the openings of the upper cover and the shell face opposite directions, and the sealing ring is connected between the upper cover and the shell;

the sealing ring is provided with an insulating end and a limiting end which are opposite, the insulating end is close to the opening of the shell relative to the limiting end, and the insulating end protrudes out of the opening of the shell;

the upper cover comprises a cover plate, side walls, a connecting wall and a connecting pipe; the cover plate, the side wall, the connecting wall and the connecting pipe are sequentially connected; the side wall is tubular; the connecting wall is tubular, and the outer diameter of the connecting wall is gradually reduced along the direction from the connecting pipe to the side wall;

the opening edge of the shell is inwards bent to form a bevel-shaped bending part, the bending part is opposite to the connecting wall, more than three bending parts are arranged, all the bending parts are uniformly distributed along the opening edge of the shell, and the bending part is connected with the connecting wall through the sealing ring.

Further, the bending part is in interference fit with the sealing ring.

Further, the bending part is provided with five.

Further, in the radial direction of the housing, the maximum dimension of the portion of the bent portion protruding from the inner wall of the housing is 1 to 1.5 times the thickness of the side wall of the housing.

Further, on the cross section of the shell, the bending part is semicircular arc or V-shaped;

on the side of the housing, the bent portion is V-shaped.

Further, the limiting end is bent inwards to form an annular limiting part, and the limiting part is located between the opening edge of the upper cover and the inner end surface of the shell.

Further, the limiting part is bent towards the direction close to the cover plate to form a hook part, the limiting end, the limiting part and the hook part are connected to form a U-shaped part, and the opening edge of the upper cover is positioned in the U-shaped part.

Further, the outer wall of the sealing ring is provided with an interference protrusion, and the interference protrusion is in interference fit with the inner wall of the shell.

Further, the interference bulge is annular surrounding the outer wall of the sealing ring.

Further, the packaged compact button cell further comprises a cell, wherein the cell is positioned in the upper cover, and the cell is in a winding type or laminated type.

Compared with the prior art, the utility model has the beneficial effects that: the tightly packaged button cell comprises a shell, an upper cover and a sealing ring, wherein the shell and the upper cover are cylindrical, one end of each cylindrical is open, the upper cover is positioned in the shell, the openings of the upper cover and the shell face opposite directions, the upper cover and the shell form a closed space, and the sealing ring is connected between the upper cover and the shell, so that the tightness of the upper cover and the shell is enhanced. The sealing ring is provided with an opposite insulating end and a limiting end, the insulating end is close to the opening of the shell relative to the limiting end, the insulating end protrudes out of the opening of the shell, the upper cover is not in direct contact with the shell, and the sealing ring enables the battery to form polar insulation. The upper cover comprises a cover plate, side walls, a connecting wall and a connecting pipe; the cover plate, the side wall, the connecting wall and the connecting pipe are sequentially connected; the side wall is tubular; the connecting wall is tubular, and along the direction of connecting pipe to lateral wall, the external diameter of connecting wall reduces gradually, and connecting wall and connecting pipe form the step, are convenient for encapsulate. The opening edge of the shell is inwards bent to form a bevel-shaped bending part, the bending part is opposite to the connecting wall, and the matching arrangement of the bending part and the connecting wall can play a role in hooking, so that the upper cover is tightly connected with the shell; and the number of the bending parts is more than three, all the bending parts are uniformly distributed along the edge of the opening of the shell, and the bending parts are connected with the connecting wall through the sealing rings, so that the periphery of the opening of the shell is ensured to be connected with the upper cover. When processing, all kinks can be after the back technology turn-up one shot forming, ensure that the roll up of all kinks presses the angle unanimous, structural stability is strong, and shell and upper cover are difficult for taking place relative displacement, have promoted the connection compactness of kink and linking wall, and upper cover and shell are connected stably, and the leakproofness of two is good, and the battery is difficult for appearing leaking the liquid phenomenon, and battery performance is difficult for impaired.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments are briefly described below, and the drawings in the following description are only drawings corresponding to some embodiments of the present utility model.

Fig. 1 is an axial cross-sectional view of a packaged compact button cell provided in accordance with a preferred embodiment of the present utility model.

Fig. 2 is another angular axial cross-section of the packaged compact button cell of fig. 1.

Fig. 3 is a schematic view of the structure of the tightly packed button cell of fig. 1.

Fig. 4 is an enlarged view of the structure of the portion a in fig. 3.

Fig. 5 is a schematic top view of the packaged compact button cell of fig. 1.

Fig. 6 is an enlarged view of the structure of the portion B in fig. 5.

Wherein, 1, the outer shell, 2, the upper cover, 3, the sealing ring, 4, the electric core;

11. the device comprises a bending part, a cover plate, a side wall, a connecting pipe, an insulating end, a limiting end, an interference protrusion, a first lug, a second lug and a connecting pipe, wherein the bending part, the cover plate, the side wall and the connecting wall are respectively arranged at the positions of the connecting pipe, the insulating end and the connecting pipe;

321. limit part, 322, collude part, 323, U-shaped portion.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms of directions, such as "inner" and "outer", used herein are merely referring to the orientation of the drawings, and are used for the purpose of illustrating and understanding the present utility model, not for the purpose of limiting the same.

The words "first," "second," and the like in the terminology of the present utility model are used for descriptive purposes only and are not to be construed as indicating or implying relative importance and not as limiting the order of precedence.

In the present utility model, unless explicitly specified and limited otherwise, the term "connected" is to be construed broadly, and for example, may be a fixed connection, may be a removable connection, or may be an integral unit; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 and 2, a tightly packaged button cell is provided in a preferred embodiment of the present utility model, which includes a housing 1, an upper cover 2 and a sealing ring 3, wherein the housing 1 and the upper cover 2 are both in a cylindrical shape with one end open, the upper cover 2 is located in the housing 1, the openings of the upper cover 2 and the housing 1 face opposite, the upper cover 2 and the housing 1 form a closed space, and other components of the cell can be accommodated. The sealing ring 3 is connected between the upper cover 2 and the shell 1, so that the tightness between the upper cover 2 and the shell 1 is enhanced.

In this embodiment, the housing 1 is made of stainless steel, which is sturdy and durable.

In other embodiments, the housing may be made of aluminum, which is lightweight and low cost.

In this embodiment, the closed end portion of the casing 1 protrudes outward, increasing the volume of the casing 1, making the volume of the closed space formed by the upper cover 2 and the casing 1 larger, and improving the battery performance.

The sealing ring 3 is provided with an opposite insulating end 31 and a limiting end 32, the insulating end 31 is close to the opening of the shell 1 relative to the limiting end 32, the insulating end 31 protrudes out of the opening of the shell 1, the upper cover 2 is not in direct contact with the shell 1, and the sealing ring 3 enables the battery to form polar insulation.

In this embodiment, the sealing ring 3 is made of plastic, and the plastic can play an insulating role. Preferably PP (Polypropylene), PE (polyethylene), PS (Polystyrene), any of which is used.

The upper cover 2 includes a cover plate 21, a side wall 22, a connection wall 23, and a connection pipe 24; the cover plate 21, the side wall 22, the connecting wall 23 and the connecting pipe 24 are connected in sequence; the side wall 22 is tubular; the connecting wall 23 is tubular, and the outer diameter of the connecting wall 23 is gradually reduced along the direction from the connecting pipe 24 to the side wall 22, and the connecting wall 23 and the connecting pipe 24 form a step so as to form an inverted buckle structure, thereby being convenient for packaging.

In this embodiment, the upper cover 2 is made of stainless steel, which is sturdy and durable.

In other embodiments, the upper cover may be made of aluminum, which is light and low in cost.

Referring to fig. 3 and 4, the opening edge of the housing 1 is bent inwards to form a bevel-shaped bending portion 11, the bending portion 11 is opposite to the connecting wall 23, the number of the bending portions 11 is more than three, all the bending portions 11 are uniformly distributed along the opening edge of the housing 1, and the bending portions 11 are connected with the connecting wall 23 through the sealing ring 3. Because the opening edge of the shell 1 is inwards bent to form the bevel-shaped bending part 11, the bending part 11 is opposite to the connecting wall 23, and the matching arrangement of the bending part 11 and the connecting wall 23 can play a role of hooking, so that the upper cover 2 is tightly connected with the shell 1; and the number of the bending parts 11 is more than three, all the bending parts 11 are uniformly distributed along the opening edge of the shell 1, and the bending parts 11 are connected with the connecting wall 23 through the sealing ring 3, so that the periphery of the opening of the shell 1 is ensured to be connected with the upper cover 2. During processing, all the bending parts 11 can be formed at one time after the after-process hemming, so that the rolling angles of all the bending parts 11 are consistent, the structural stability is high, the relative displacement of the shell 1 and the upper cover 2 is not easy to occur, the connection tightness of the bending parts 11 and the connecting wall 23 is improved, the upper cover 2 and the shell 1 are connected stably, the tightness of the upper cover 2 and the shell 1 is good, the leakage phenomenon of a battery is not easy to occur, and the battery performance is not easy to damage.

The bending part 11 is in interference fit with the sealing ring 3. The bending part 11 is tightly connected with the sealing ring 3, the battery is tightly packaged, and the leakage of the battery is further avoided.

Referring to fig. 5, five bending portions 11 are provided. The greater the number of the bent portions 11, the better the sealability between the upper cover 2 and the housing 1, but the greater the number of the bent portions 11, the more inconvenient the manufacture, so in this embodiment, the number of the bent portions 11 is set to five as a preferred embodiment.

Referring to fig. 6, in the radial direction of the housing 1, the maximum dimension L of the portion of the bent portion 11 protruding from the inner wall of the housing 1 is 1 to 1.5 times the thickness of the side wall of the housing 1. If the dimension of L is too small relative to the thickness of the side wall of the housing 1, the bent portion 11 does not easily function as a hook, and the connection between the upper cover 2 and the housing 1 is not tight. If the dimension of L is excessively large with respect to the thickness of the side wall of the housing 1, a larger force is applied to the opening edge of the housing 1 at the time of manufacturing the bent portion 11, which is disadvantageous in manufacturing, so that in this embodiment, the dimension of L is set to 1 to 1.5 times the thickness of the side wall of the housing 1 as a preferred embodiment.

Referring to fig. 5 and 6, on the cross section of the housing 1, the bending portion 11 is in a semicircular arc shape or a V-shape, the contact surface of the semicircular arc bending portion 11 is larger, the connection is tighter, and the V-shaped bending portion 11 is convenient for the opening edge of the housing 1 to bend inwards, so as to facilitate the manufacture. Referring to fig. 3 and 4, on the side surface of the housing 1, the bending portion 11 is V-shaped, so that the opening edge of the housing 1 is bent inwards, and the manufacturing is facilitated.

Referring to fig. 1, the limiting end 32 is bent inwards to form an annular limiting portion 321, and the limiting portion 321 is located between the opening edge of the upper cover 2 and the inner end surface of the housing 1, so as to avoid direct contact between the upper cover 2 and the housing 1, and form battery polarity insulation. And sealing washer 3 material is soft relatively, and then the material of spacing portion 321 is also soft relatively, and spacing portion 321 can play the cushioning effect to the opening border of upper cover 2, avoids the opening border of upper cover 2 to rub with the interior terminal surface of shell 1, avoids the opening border deformation of upper cover 2.

The limiting part 321 is bent towards the direction close to the cover plate 21 to form a hook part 322, the limiting end 32, the limiting part 321 and the hook part 322 are connected to form a U-shaped part 323, and the opening edge of the upper cover 2 is positioned in the U-shaped part 323. The U-shaped part 323 enables the sealing ring 3 to be hooked on the upper cover 2, and the upper cover 2 and the sealing ring 3 can be formed into a whole during assembly, and then the whole is assembled with the shell 1, so that the assembly is convenient.

The outer wall of sealing washer 3 is provided with interference protruding 33, and interference protruding 33 and the inner wall interference fit of shell 1 have further promoted the leakproofness between upper cover 2 and the shell 1.

In this embodiment, the interference protrusion 33 is close to the limiting end 32 relative to the insulating end 31, the interference protrusion 33 is closer to the opening of the upper cover 2, the sealing ring 3 has better tightness at the opening of the upper cover 2, and liquid in the upper cover 2 is further prevented from leaking out.

The interference bulge 33 is annular surrounding the outer wall of the sealing ring 3, and the whole circle of interference bulge 33 is in interference fit with the inner wall of the shell 1, so that the tightness is further improved.

In other embodiments, the interference protrusions can be set to be in a dot shape, a plurality of interference protrusions are arranged in number, the interference protrusions encircle the outer wall of the sealing ring to form a ring shape, the size of the interference protrusions is reduced, and the cost is reduced.

Or, the interference bulge can be set to be spiral, so that the contact area between the interference bulge and the inner wall of the shell is increased, and the tightness is further improved.

The tightly packaged button cell also comprises a cell 4, wherein the cell 4 is positioned in the upper cover 2, and the cell 4 is in a winding type or laminated type. The battery cell 4 is used for storing electric energy, the winding type battery cell 4 is easy to weld and convenient to produce and control; the laminated cell 4 has high energy density and flexible volume, and is convenient to assemble with the upper cover 2.

In this embodiment, the battery cell 4 has a first tab 41 and a second tab 42, which conduct the electricity stored in the battery cell 4, the first tab 41 is conducted with the housing 1, and the second tab 42 is conducted with the upper cover 2.

In summary, although the present utility model has been described in terms of the preferred embodiments, the above-mentioned embodiments are not intended to limit the utility model, and those skilled in the art can make various modifications and alterations without departing from the spirit and scope of the utility model, so that the scope of the utility model is defined by the appended claims.

Claims

1. A tightly packed button cell, characterized in that: the sealing device comprises a shell, an upper cover and a sealing ring, wherein the shell and the upper cover are cylindrical, one end of each cylindrical is open, the upper cover is positioned in the shell, the openings of the upper cover and the shell face opposite directions, and the sealing ring is connected between the upper cover and the shell;

2. The packaged compact button cell battery of claim 1, wherein: the bending part is in interference fit with the sealing ring.

3. The packaged compact button cell battery of claim 1, wherein: five bending parts are arranged.

4. The packaged compact button cell battery of claim 1, wherein: in the radial direction of the shell, the maximum size of the part of the bending part protruding out of the inner wall of the shell is 1-1.5 times of the thickness of the side wall of the shell.

5. The packaged compact button cell battery of claim 1, wherein: the cross section of the shell is semicircular or V-shaped;

on the side of the housing, the bent portion is V-shaped.

6. The packaged compact button cell battery of claim 1, wherein: the limiting end is inwards bent to form an annular limiting part, and the limiting part is positioned between the opening edge of the upper cover and the inner end surface of the shell.

7. The packaged compact button cell battery of claim 6, wherein: the limiting part is bent towards the direction close to the cover plate to form a hook part, the limiting end, the limiting part and the hook part are connected to form a U-shaped part, and the opening edge of the upper cover is positioned in the U-shaped part.

8. The packaged compact button cell battery of claim 1, wherein: the outer wall of the sealing ring is provided with an interference bulge, and the interference bulge is in interference fit with the inner wall of the shell.

9. The packaged compact button cell battery of claim 8, wherein: the interference bulge is annular surrounding the outer wall of the sealing ring.

10. The packaged compact button cell battery of claim 1, wherein: the packaged compact button cell further comprises a cell, wherein the cell is positioned in the upper cover and is of a winding type or laminated type.