CN212848643U

CN212848643U - Button cell

Info

Publication number: CN212848643U
Application number: CN202021145143.9U
Authority: CN
Inventors: 周志勇; 韩子勤; 刘盛发; 席鹏飞
Original assignee: Springpower Technology Shenzhen Co Ltd
Current assignee: Springpower Technology Shenzhen Co Ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-03-30
Anticipated expiration: 2030-06-18

Abstract

The utility model belongs to the technical field of batteries, and relates to a button battery, which comprises an upper cover, a lower cover, an insulating support frame and a soft package battery core; the upper cover and the lower cover form a containing cavity for containing the soft-package battery cell through the insulating support frame; an annular skirt edge is formed on the periphery of the soft-package battery cell, and the bottom of the insulating support frame is supported above the skirt edge; the insulating support frame is provided with a connecting groove with an upward opening, and the opening end of the upper cover is inserted in the connecting groove; the open end of the lower cover is connected with the outer side of the insulation supporting frame. Set up the spread groove on insulating support frame, can peg graft the open end of upper cover in the spread groove, connect the open end of lower cover in insulating support frame's the outside again, thereby make upper cover and lower cover amalgamation together, insulating support frame plays and connects upper cover and lower cover, support the effect of upper cover and insulating upper cover and lower cover, support insulating support frame in the skirt of soft-packaged electrical core, can make full use of hold the space of intracavity, and improve insulating support frame's supporting effect.

Description

Button cell

Technical Field

The utility model belongs to the technical field of the battery, especially, relate to a button cell.

Background

The button cell is also called as button cell, which is a cell with the external dimension like a small button, generally has larger diameter and thinner thickness; button cells are widely used in various miniature electronic products due to their small size. In recent years, with the development of science and technology, button batteries are more and more deeply inserted into the lives of people, which puts higher and higher requirements on the safety performance of the button batteries.

The existing hard shell button battery is formed by directly buckling an upper electrode cover and a lower electrode cover to form a containing cavity used for containing a soft package battery core, the upper electrode cover and the lower electrode cover are insulated through an insulating layer, the structural support effect formed by the mode is poor, the quality is low, and the space of the containing cavity cannot be fully utilized.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the button cell is provided aiming at the problems that the shell of the existing button cell has poor supporting effect and low quality and cannot fully utilize the space in the shell.

In order to solve the technical problem, an embodiment of the utility model provides a button battery, which comprises an upper cover, a lower cover, an insulating support frame and a soft package battery cell; the upper cover and the lower cover form an accommodating cavity for accommodating the soft package battery cell through the insulating support frame;

an annular skirt edge is formed on the periphery of the soft package battery cell, and the bottom of the insulating support frame is supported above the skirt edge;

the insulating support frame is provided with a connecting groove with an upward opening, and the opening end of the upper cover is inserted into the connecting groove; the open end of the lower cover is connected to the outer side of the insulating support frame.

Optionally, a first flange protruding outward in the radial direction of the soft-package battery cell is arranged on one side, close to the lower cover, of the insulating support frame, and a first clamping groove is formed in one side, located on the first flange, of the connecting groove and facing the soft-package battery cell;

an annular bulge clamped in the first clamping groove is arranged at the opening end of the upper cover;

and a second clamping groove is formed in the inner wall of the lower cover towards the position of the first flange, and the first flange is clamped in the second clamping groove.

Optionally, the cross section of the first flange is V-shaped, and the cross section of the second clamping groove is matched with the cross section of the first flange.

Optionally, the cross section of the annular protrusion is in a V shape, and the cross section of the first clamping groove is matched with the cross section of the annular protrusion.

Optionally, a first tab and a second tab are led out of the soft-package battery cell, one of the first tab and the second tab is a positive tab, and the other is a negative tab;

the first pole lug is electrically connected to the inner wall of the lower cover, and the second pole lug is electrically connected to the inner wall of the upper cover.

Optionally, the side wall of the upper cover is provided with a first gap and a second gap, and the side wall of the lower cover is provided with a third gap and a fourth gap;

the first notch and the third notch are combined into a first avoidance hole for avoiding the first tab;

and the second gap and the fourth gap are spliced to form a second avoidance hole for avoiding the second tab.

Optionally, the lead-out positions of the first tab and the second tab are circumferentially different by 180 degrees.

Optionally, the insulating support frame includes the first section of insulating support frame and the insulating support frame second section of mutual separation, the first section of insulating support frame reaches the insulating support frame second section is circular-arcly, the first end of the first section of insulating support frame extends to first one side edge of dodging the hole, the second end of the first section of insulating support frame extends to the second dodges one side edge of hole, the first end of the second section of insulating support frame extends to first another side edge of dodging the hole, the second end of the second section of insulating support frame extends to the second dodges the other side edge of hole.

Optionally, the first tab is welded to the inner wall of the lower cover, and a first insulating layer is attached to a portion of the first tab other than the welding point.

Optionally, the second tab is welded to the inner wall of the upper cover, and a second insulating layer is attached to a portion of the second tab other than the welding point.

The embodiment of the utility model provides a button cell, compared with the prior art, set up the insulating support frame, and set up the spread groove on the insulating support frame, can peg graft the open end of upper cover in the spread groove, connect the open end of lower cover in the outside of insulating support frame again, thereby make upper cover and lower cover amalgamation together, the insulating support frame plays and connects upper cover and lower cover, support the effect of upper cover and insulating upper cover and lower cover, support the insulating support frame on the skirt of soft-packaged electrical core, can make full use of hold the space of intracavity, minimize button cell's overall dimension, and can improve the supporting effect of insulating support frame.

Drawings

Fig. 1 is a schematic structural view of a button cell according to an embodiment of the present invention;

fig. 2 is an exploded view of the button cell of fig. 1;

FIG. 3 is a schematic structural view of the upper cover of FIG. 2;

FIG. 4 is a schematic structural diagram of the insulating support frame of FIG. 2;

FIG. 5 is a schematic view of the upper cover and the insulating support bracket of FIG. 2 assembled together;

FIG. 6 is a schematic structural view of the lower cover of FIG. 2;

FIG. 7 is a cross-sectional view of the button cell of FIG. 1;

fig. 8 is a sectional view from another perspective of the button cell of fig. 1.

The reference numerals in the specification are as follows:

1. an upper cover; 11. an annular projection; 12. a first notch; 13. a second notch;

2. a lower cover; 21. a second clamping groove; 22. a third notch; 23. a fourth notch; 24. a second flange;

3. an insulating support frame; 3a, a first section of an insulating support frame; 3b, a second section of the insulating support frame; 31. connecting grooves; 311. a first clamping groove; 32. a first flange;

4. soft-packaged battery cells; 41. a skirt edge; 42. a first tab; 43. a second tab;

5. a receiving cavity.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

As shown in fig. 1 to 7, a button battery provided in an embodiment of the present invention includes an upper cover 1, a lower cover 2, an insulating support frame 3, and a soft package battery cell 4; the upper cover 1 and the lower cover 2 form an accommodating cavity 5 for accommodating a soft-package battery cell 4 through an insulating support frame 3;

an annular skirt edge 41 is formed on the periphery of the soft package battery cell 4, and the bottom of the insulating support frame 3 is supported above the skirt edge 41;

the insulating support frame 3 is provided with a connecting groove 31 with an upward opening, and the opening end of the upper cover 1 is inserted in the connecting groove 31; the open end of the lower cover 2 is connected with the outer side of the insulation support frame 3.

The embodiment of the utility model provides a button cell, compared with the prior art, set up insulating support frame 3, and set up spread groove 31 on insulating support frame 3, can peg graft the open end of upper cover 1 in spread groove 31, connect the open end of lower cover 2 in insulating support frame 3's the outside again, thereby make upper cover 1 and lower cover 2 amalgamation together, insulating support frame 3 plays and connects upper cover 1 and lower cover 2, support the effect of upper cover 1 and insulating upper cover 1 and lower cover 2, support insulating support frame 3 on the shirt rim 41 of soft-packaged electrical core 4, can make full use of hold the space in the chamber 5, minimize button cell's overall dimension, and can improve insulating support frame 3's supporting effect.

In an embodiment, as shown in fig. 3 to 6, a side of the insulating support frame 3 close to the lower cover 2 is provided with a first flange 32 protruding outward in a radial direction of the soft packing core 4, and a side of the connection groove 31 located on the first flange 32 and facing the soft packing core 4 forms a first snap-in groove 311;

the opening end of the upper cover 1 is provided with an annular bulge 11 clamped in the first clamping groove 311;

a second catching groove 21 is formed on the inner wall of the lower cover 2 at a position facing the first flange 32, and the first flange 32 is caught in the second catching groove 21. Through setting up first flange 32, and the position towards first flange 32 forms second joint groove 21 on the inner wall of lower cover 2, can conveniently with first flange 32 joint in second joint groove 21, realize being connected between lower cover 2 and the insulation support frame 3, through forming first joint groove 311 in one side of spread groove 31, set up annular protrusion 11 at the open end of upper cover 1, can make things convenient for being connected between upper cover 1 and the insulation support frame 3, and because insulation support frame 3 supports on soft-package electricity core 4's shirt rim 41, the supporting effect that insulation support frame 3 supported upper cover 1 has been improved to a certain extent, thereby make the holistic supporting effect of button cell better.

Preferably, the second clamping groove 21 is formed by bending a part of the side wall of the lower cover 2 outward along the radial direction of the soft-package battery core 4, as shown in fig. 6, and the second flange 24 and the second clamping groove 21 are formed after the part of the side wall of the lower cover 2 is bent.

In one embodiment, the annular protrusion 11 and the first catching groove 311 and the first flange 32 and the second catching groove 21 are connected together by welding.

In one embodiment, as shown in fig. 6 and 7, the first flange 32 has a V-shaped cross section, and the cross-sectional shape of the second snap groove 21 is matched with the cross-sectional shape of the first flange 32. The first flange 32 can be easily coupled to the second catching groove 21 and the coupling stability can be improved.

In one embodiment, as shown in fig. 3, 4 and 7, the cross section of the annular protrusion 11 is V-shaped, and the cross section of the first catching groove 311 is matched with the cross section of the annular protrusion 11. It is possible to facilitate the connection of the annular projection 11 to the first catching groove 311 and to improve the connection stability.

In an embodiment, as shown in fig. 8, a first tab 42 and a second tab 43 are led out from the soft package battery cell 4, one of the first tab 42 and the second tab 43 is a positive tab, and the other is a negative tab;

the first tab 42 is electrically connected to the inner wall of the lower cover 2, and the second tab 43 is electrically connected to the inner wall of the upper cover 1. The upper cover 1 and the lower cover 2 are made of good conductor materials with certain hardness.

In an embodiment, as shown in fig. 1, 3 and 6, a first notch 12 and a second notch 13 are formed on a side wall of the upper cover 1, and a third notch 22 and a fourth notch 23 are formed on a side wall of the lower cover 2;

the first notch 12 and the third notch 22 are combined to form a first avoidance hole for avoiding the first tab 42;

the second notch 13 and the fourth notch 23 are combined to form a second avoidance hole for avoiding the second tab 43. By arranging the first avoidance hole and the second avoidance hole to avoid the tabs (the first tab 42 and the second tab 43), the sizes of the upper cover 1 and the lower cover 2 can be reduced under the condition that the soft package battery core 4 is not changed, so that the overall dimension of the button battery is reduced; and set up first hole of dodging and the hole of dodging is dodged to the second for

upper cover

1 and 2 connection backs of lower cover form half seal structure, and when soft-packaged electrical core 4 took place to rise, soft-packaged electrical core 4 can have certain extension space, improves the safety in utilization.

In one embodiment, as shown in fig. 8, the lead-out positions of the first tab 42 and the second tab 43 are circumferentially separated by 180 degrees, so as to facilitate the lead-out of the first tab 42 and the second tab 43 and avoid the interference of the first tab 42 and the second tab 43.

In an embodiment, as shown in fig. 2, the insulation support frame 3 includes a first section 3a and a second section 3b, which are separated from each other, the first section 3a and the second section 3b are arc-shaped, a first end of the first section 3a extends to a side edge of the first avoiding hole, a second end of the first section 3a extends to a side edge of the second avoiding hole, a first end of the second section 3b extends to another side edge of the first avoiding hole, and a second end of the second section 3b extends to another side edge of the second avoiding hole. Through setting insulating support frame 3 to two sections of mutual spaced apart with cooperation upper cover 1 and the lower cover 2 that has set up the breach, improve the convenience and the compactness of assembly.

In one embodiment, the first tab 42 is welded to the inner wall of the lower cover 2, and a first insulating layer (not shown) is attached to a portion of the first tab 42 other than the welding point, so as to prevent the soft packing cell 4 from short-circuiting.

In one embodiment, a second tab 43 is welded to the inner wall of the upper cover 1, and a second insulating layer (not shown) is attached to a portion of the second tab 43 other than the welding point, so as to prevent the soft packing cell 4 from short-circuiting.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A button battery is characterized by comprising an upper cover, a lower cover, an insulating support frame and a soft package battery cell; the upper cover and the lower cover form an accommodating cavity for accommodating the soft package battery cell through the insulating support frame;

2. The button battery according to claim 1, wherein a side of the insulating support frame close to the lower cover is provided with a first flange protruding outward in a radial direction of the soft package core, and a side of the connecting groove located on the first flange and facing the soft package core forms a first clamping groove;

3. The button cell as defined in claim 2, wherein the first flange has a V-shaped cross section, and the second snap groove has a cross section adapted to the cross section of the first flange.

4. The button cell as claimed in claim 2, wherein the cross section of the annular protrusion is V-shaped, and the cross section of the first snap groove is adapted to the cross section of the annular protrusion.

5. The button battery according to claim 1, wherein a first tab and a second tab are led out from the flexible package battery cell, one of the first tab and the second tab is a positive electrode tab, and the other one of the first tab and the second tab is a negative electrode tab;

6. The button cell according to claim 5, wherein the side wall of the upper cover is provided with a first notch and a second notch, and the side wall of the lower cover is provided with a third notch and a fourth notch;

7. The button cell according to claim 6, wherein the lead-out positions of the first tab and the second tab are circumferentially different by 180 degrees.

8. The button cell of claim 6, wherein the insulating support frame comprises a first section of the insulating support frame and a second section of the insulating support frame which are separated from each other, the first section of the insulating support frame and the second section of the insulating support frame are arc-shaped, a first end of the first section of the insulating support frame extends to one side edge of the first avoiding hole, a second end of the first section of the insulating support frame extends to one side edge of the second avoiding hole, a first end of the second section of the insulating support frame extends to the other side edge of the first avoiding hole, and a second end of the second section of the insulating support frame extends to the other side edge of the second avoiding hole.

9. The button cell as defined in claim 5, wherein the first tab is welded to the inner wall of the lower cover, and a first insulating layer is attached to a portion of the first tab other than the welded portion.

10. The button cell as set forth in claim 9, wherein said second tab is welded to an inner wall of said upper cover, and a second insulating layer is attached to a portion of said second tab other than said welding point.