CN211957742U

CN211957742U - Button cell

Info

Publication number: CN211957742U
Application number: CN202020669133.9U
Authority: CN
Inventors: 张银; 袁卉军; 简爱军; 张国民; 龙翔
Original assignee: Shenzhen Betterpower Battery Co ltd
Current assignee: Shenzhen Betterpower Battery Co ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2020-11-17
Anticipated expiration: 2030-04-27

Abstract

The utility model relates to a button cell, which comprises a lower shell, an upper shell assembled with the lower shell, an electric core arranged in the upper shell, and a sealing structure sleeved on the periphery of the upper shell and positioned between the lower shell and the upper shell; the lower shell comprises a lower shell body, a first opening which is arranged on the lower shell body and used for the upper shell to be arranged in, and a first sealing part which is arranged on the lower shell body and extends towards the direction of the first opening; the sealing structure comprises a body, a second sealing part and a sealing part, wherein openings are formed in two ends of the body, the body is sleeved on the periphery of the upper shell, and the second sealing part is arranged at one end of the body and extends towards the opening at one end of the body; the second sealing part is arranged between the first sealing part and the upper shell and is matched with the first sealing part to seal the lower shell and the upper shell. This button cell seals this inferior valve and epitheca through first sealing and the cooperation of second sealing, and then can prevent the weeping to improve this button cell's security performance.

Description

Button cell

Technical Field

The utility model relates to a battery, more specifically say, relate to a button cell.

Background

With the development of various electronic devices, lithium batteries have the advantages of high voltage, small size, high energy density, good cycle performance and the like, so that the lithium batteries are more and more widely applied and are more and more in demand. Button lithium cell also receives the favor of each trade simultaneously, like intelligent wearing equipment battery, all have button cell like products such as TWS bluetooth headset, motion bracelet, but lithium cell weeping problem is an important topic of everybody's concern always, and the user is zero defect to the weeping safety requirement of product.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in that, a modified button cell is provided.

The utility model provides a technical scheme that its technical problem adopted is: constructing a button battery, which comprises a lower shell, an upper shell assembled with the lower shell, an electric core arranged in the upper shell, and a sealing structure sleeved on the periphery of the upper shell and positioned between the lower shell and the upper shell;

the lower shell comprises a lower shell body, a first opening which is arranged on the lower shell body and used for the upper shell to be arranged in, and a first sealing part which is arranged on the lower shell body and extends towards the direction of the first opening;

the sealing structure comprises a body, a second sealing part and a sealing part, wherein openings are formed in two ends of the body, the body is sleeved on the periphery of the upper shell, and the second sealing part is arranged at one end of the body and extends towards the opening at one end of the body;

the second sealing part is arranged between the first sealing part and the upper shell and is matched with the first sealing part to seal the lower shell and the upper shell.

Preferably, the sealing structure further includes a third sealing portion provided at the other end of the body and extending toward the opening of the other end of the body.

Preferably, a first accommodating cavity for accommodating the upper shell is formed inside the lower shell body, and the lower shell body comprises a disk-shaped bottom wall and a ring-shaped first side wall extending upwards from the circumferential edge of the bottom wall;

the first opening is arranged opposite to the bottom wall;

the first sealing portion is arranged at one end, far away from the bottom wall, of the first side wall.

Preferably, the height of the first sidewall is higher than the height of the upper case.

Preferably, the width of the second sealing part is 0.1-3.0 mm.

Preferably, the upper shell comprises an upper shell body and a second opening arranged at one end of the upper shell body;

when the lower shell is assembled with the upper shell, the second opening is arranged opposite to the first opening, and the third sealing part extends towards the second opening.

Preferably, a second accommodating cavity for accommodating the battery cell is formed on the inner side of the upper shell body;

the upper shell body comprises a top wall in a disc shape and a second side wall which extends downwards at the circumferential edge of the top wall and is in a ring shape;

the second opening is arranged opposite to the top wall;

when the lower shell, the upper shell and the sealing structure are assembled, the second sealing part is pressed on the top wall, and the first sealing part is pressed on the second sealing part.

Preferably, the first sealing part is integrally formed with the lower case body.

Preferably, the second sealing portion and the third sealing portion are respectively integrally formed with the body.

Preferably, the sealing structure is a sealing ring.

Implement the utility model discloses a button cell has following beneficial effect: this button cell sets up the second sealing portion that extends towards this body one end opening and set up between this first sealing portion and epitheca through setting up the first sealing portion that extends towards first opening direction on this inferior valve body, at the one end of the body of seal structure, seals this inferior valve and epitheca through the cooperation of first sealing portion and second sealing portion, and then can prevent the weeping to improve this button cell's security performance.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a cross-sectional view of a button cell in some embodiments of the invention.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 shows some preferred embodiments of the button cell of the present invention. The button battery has reliable sealing performance, and can prevent liquid leakage in the use process and under abnormal conditions, thereby greatly improving the safety performance of the button battery and protecting the personal safety of users.

Further, as shown in fig. 1, in some embodiments, the button battery may include a lower case 10, an upper case 20, a sealing structure 30, and a battery cell 40. The lower case 10 can be used to house the upper case 20, the sealing structure 30 and the battery cell 40. The upper case 20 can be assembled with the lower case 10. The battery cell 40 may be disposed in the upper case 20, and may generate electric energy through an electrochemical reaction. The sealing structure 30 may be sleeved on the periphery of the upper casing 10, and may be located between the lower casing 10 and the upper casing 20, which may seal a gap between the lower casing 10 and the upper casing 20.

Further, in some embodiments, the lower case 10 may include a lower case body 11, a first opening 12, and a first sealing part 13. In some embodiments, the lower shell 11 may be a hollow structure, which may be a steel shell, and it is understood that in other embodiments, the lower shell 11 may not be limited to a steel shell. The first opening 12 may be disposed on the lower case 11, and may be used for installing the upper case 20 into the lower case 11. The first sealing structure 13 can be disposed on the lower case body 11 and can extend toward the first opening 12, and can cooperate with the sealing structure 30 to seal the lower case body 11 and the upper case 20 when the lower case 10 and the upper case 20 are assembled, so as to prevent the electrolyte from leaking out of the first opening 12.

In some embodiments, a first receiving cavity may be formed inside the lower case body 11; the first accommodating cavity can be used for accommodating the upper shell 20 and the battery cell 40. In some embodiments, the cross-section of the lower shell 11 may be circular, although it is understood that in other embodiments, the cross-section of the lower shell 11 may not be limited to circular. In some embodiments, the lower case body 11 may include a bottom wall 111 and a first sidewall 112. The bottom wall 111 may be disc-shaped, and the first side wall may be ring-shaped, may extend upwards from the circumferential edge of the bottom wall 111, and may be integrally formed with the bottom wall 111, and in particular, in some embodiments, may be integrally formed with the bottom wall 111 by casting. In some embodiments, the height of the first sidewall 112 can be higher than the height of the upper shell 20, so that the upper shell 20 can be entirely accommodated in the first accommodating cavity.

In some embodiments, the first opening 12 is disposed opposite to the bottom wall 111, the first opening 12 may be circular, and the inner diameter of the first opening 12 may be smaller than the inner diameter of the bottom wall 111. The first opening 12 can communicate with the first receiving cavity, which can be used for the upper shell 20 to be installed in the first receiving cavity.

In some embodiments, the first sealing portion 13 may be annular, and may be disposed at an end of the first sidewall 112 away from the bottom wall 111. The first sealing part 13 may be integrally formed with the lower case 11. Specifically, in some embodiments, the first sealing portion 13 may be integrally formed with the first sidewall 112 by casting.

In some embodiments, the upper shell 20 may include an upper shell body 21 and a second opening 22. The upper case body 21 may be cylindrical and may have a height smaller than that of the lower case body 11. The outer diameter of the upper shell 21 may be smaller than the inner diameter of the lower shell 11, and the upper shell may be entirely accommodated in the first accommodating cavity of the lower shell 11. The upper shell body 21 is a hollow structure, and a second receiving cavity 23 can be formed inside the upper shell body. The second accommodating cavity 23 may be used to accommodate the battery cell 40 and the electrolyte. The upper case body 21 may include a top wall 211 and a second side wall 212. The top wall 211 may be disc-shaped, the second side wall may be annular, and the second side wall may extend downward from the circumferential edge of the top wall 211 and may be integrally formed with the top wall 211. Specifically, in some embodiments, it may be integrally formed with the top wall 211 by casting. The second opening 22 may be disposed at one end of the upper shell body 21, and specifically, in some embodiments, may be disposed opposite to the top wall 211, and may have a radial dimension comparable to that of the top wall 211. When the upper case 20 and the lower case 10 are mounted, the second opening 22 may be disposed opposite to the bottom wall 111 of the upper case body 11. Further, in some embodiments, the upper shell 20 may be a steel shell, and it is understood that in other embodiments, the upper shell 20 may not be limited to a steel shell.

Further, in some embodiments, the sealing structure 30 may be a sealing ring, in particular, it may be a silicone ring or a rubber ring. It is understood that in other embodiments, the sealing structure 30 may not be limited to a silicone ring or a rubber ring. In some embodiments, the seal structure 30 may include a body 31, a second seal portion 32, and a third seal portion 33. The body 31 may be cylindrical, and has an inner diameter adapted to the outer diameter of the upper case 20 and an outer diameter adapted to the inner diameter of the lower case 10. The body 31 is a hollow structure with openings at two ends, and can be sleeved on the periphery of the upper shell 20, and can be used for sealing the gap between the upper shell 20 and the lower shell 10. In some embodiments, the height of the body 31 may be greater than or equal to the height of the upper case 20, and thus, the entire outer sidewall of the upper case 20 may be wrapped. The second sealing structure 32 may be disposed at one end of the body 31 and may extend toward an opening at one end of the body 31, and may be integrally formed with the body 31, and in particular, in some embodiments, may be integrally formed with the body 31 by injection molding. In some embodiments, the width of the second sealing portion 32 is 0.1-3.0 mm, and specifically, in some embodiments, the width of the second sealing portion 32 may be 1 mm. In some embodiments, the third sealing portion 33 may be disposed at the other end of the body 31 and extend toward the opening of the other end of the body 31, and may be integrally formed with the body 31, and specifically, in some embodiments, may be integrally formed with the body 31 by injection molding.

When the button cell is assembled, the upper case 20 is sleeved on the periphery of the battery cell 40 filled with the electrolyte, the sealing structure is sleeved on the periphery of the upper case 20, the second sealing portion 32 is pressed on the top wall 211 of the upper case 20, and the third sealing portion 33 extends towards the second opening 22; then, the lower shell 10 is sleeved on the periphery of the upper shell 20 and the sealing structure 30 from bottom to top, so that the second opening of the upper shell 20 and the first opening of the lower shell 10 are arranged in a back direction, the first sealing part 13 is pressed on the second sealing part 32 towards the top wall 211 of the upper shell 20, the second sealing part 32 is arranged between the first sealing part 13 and the top wall 211 of the upper shell 20, and the lower shell 10 and the upper shell 20 are sealed through the matching of the first sealing part 13 and the second sealing part 32. It is to be understood that in other embodiments, the button cell assembly is not limited to the steps and sequence set forth above.

It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. A button battery is characterized by comprising a lower shell (10), an upper shell (20) assembled with the lower shell (10), a battery cell (40) arranged in the upper shell (20), and a sealing structure (30) sleeved on the periphery of the upper shell (20) and positioned between the lower shell (10) and the upper shell (20);

the lower shell (10) comprises a lower shell body (11), a first opening (12) arranged on the lower shell body (11) and used for the upper shell (20) to be installed in, and a first sealing part (13) arranged on the lower shell body (11) and extending towards the direction of the first opening (12);

the sealing structure (30) comprises a body (31) with openings at two ends and sleeved on the periphery of the upper shell (20), and a second sealing part (32) which is arranged at one end of the body (31) and extends towards the opening at one end of the body (31);

the second sealing part (32) is arranged between the first sealing part (13) and the upper shell (20) and is matched with the first sealing part (13) to seal the lower shell (10) and the upper shell (20).

2. Button cell according to claim 1, characterised in that the sealing structure (30) further comprises a third sealing portion (33) provided at the other end of the body (31) and extending towards the opening of the other end of the body (31).

3. The button cell according to claim 1, wherein the lower case body (11) forms a first receiving cavity inside thereof for receiving the upper case (20), and the lower case body (11) includes a bottom wall (111) having a disk shape, and a first side wall (112) extending upward from a circumferential edge of the bottom wall (111) and having a ring shape;

the first opening (12) is arranged opposite to the bottom wall (111);

the first sealing part (13) is arranged at one end of the first side wall (112) far away from the bottom wall (111).

4. Button cell according to claim 3, characterised in that the first side wall (112) has a height which is higher than the height of the upper shell (20).

5. The button cell according to claim 1, wherein the width of the second sealing part (32) is 0.1-3.0 mm.

6. Button cell according to claim 2, characterised in that the upper shell (20) comprises an upper shell body (21), a second opening (22) provided at one end of the upper shell body (21);

when the lower shell (10) is assembled with the upper shell (20), the second opening (22) is arranged opposite to the first opening (12), and the third sealing part (33) extends towards the second opening (22).

7. The button battery according to claim 6, characterized in that a second accommodating cavity (23) for accommodating the battery cell (40) is formed inside the upper case body (21);

the upper shell body (21) comprises a disc-shaped top wall (211) and a ring-shaped second side wall (212) extending downwards at the circumferential edge of the top wall (211);

the second opening (22) is arranged opposite to the top wall (211);

when the lower shell (10), the upper shell (20) and the sealing structure (30) are assembled, the second sealing portion (32) is pressed on the top wall (211), and the first sealing portion (13) is pressed on the second sealing portion (32).

8. Button cell according to claim 1, characterised in that the first sealing (13) is integrally formed with the lower housing body (11).

9. Button cell according to claim 2, characterised in that the second and third sealing parts (32, 33) are each integrally formed with the body (31).

10. Button cell according to claim 1, characterised in that the sealing structure (30) is a sealing ring.