CN212848602U

CN212848602U - Button cell

Info

Publication number: CN212848602U
Application number: CN202021553470.8U
Authority: CN
Inventors: 韩子勤; 刘盛发; 周志勇; 席鹏飞; 雷激
Original assignee: Springpower Technology Shenzhen Co Ltd
Current assignee: Springpower Technology Shenzhen Co Ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-03-30
Anticipated expiration: 2030-07-30

Abstract

The utility model relates to a button cell, which comprises a first half shell, a second half shell, an insulating part and a soft package battery core; the opening of the first half shell is opposite to the opening of the second half shell, and the insulating piece is connected between the opening end of the first half shell and the opening end of the second half shell so as to insulate the first half shell from the second half shell; the first half shell and the second half shell are in butt joint to form a columnar cavity for accommodating the soft-package battery cell, and the axis of the columnar cavity penetrates through two axial end faces of the soft-package battery cell; the soft-packaged battery cell is provided with a first tab and a second tab which are different in polarity, the first tab is electrically connected with the first half shell, and the second tab is electrically connected with the second half shell. The utility model discloses button cell's positive negative pole can be followed two axial terminal surfaces of button cell and drawn forth respectively, can follow button cell's side interval again and draw forth, can also draw forth from button cell's same terminal surface of axial, has increased button cell's electric current extraction mode, has enlarged button cell's application range.

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 cells are more and more deeply inserted into the lives of people, so that the requirements on the button cells are higher and higher.

The existing hard shell button battery comprises an upper shell, a lower shell, an insulating part and a soft package battery core, wherein the upper shell and the lower shell are connected in an insulating way through the insulating part, and a cavity for accommodating the soft package battery core is formed in the inner sides of the upper shell and the lower shell. The upper shell cover is arranged on one axial end face of the soft-package battery cell, the lower shell cover is arranged on the other axial end face of the soft-package battery cell, a first tab and a second tab which are different in polarity are led out of the soft-package battery cell, the first tab is electrically connected with the upper shell, and the second tab is electrically connected with the lower shell; the hard-shell button battery can only lead out the positive and negative electrodes from the upper shell and the lower shell respectively, and the requirement of leading out the positive and negative electrodes from the same end face of the hard-shell button battery is difficult to meet.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: aiming at the problem that the positive and negative electrodes of the existing hard-shell button cell are single in leading-out mode, the button cell is provided.

In order to solve the technical problem, an embodiment of the present invention provides a button battery, including a first half shell, a second half shell, an insulating member, and a flexible package battery core; the opening of the first half shell is opposite to the opening of the second half shell, and the insulator is connected between the opening end of the first half shell and the opening end of the second half shell so as to insulate the first half shell from the second half shell;

the first half shell and the second half shell are in butt joint to form a cylindrical cavity for accommodating the soft package battery cell, and the axis of the cylindrical cavity penetrates through two axial end faces of the soft package battery cell;

the soft package battery cell is arranged in the columnar cavity; the soft-packaged battery cell is characterized in that a first tab and a second tab which are different in polarity are led out, the first tab is electrically connected with the first half shell, and the second tab is electrically connected with the second half shell.

Optionally, the columnar cavity has a shape with a wide middle part and narrow ends, and the axis of the columnar cavity is perpendicular to two axial end faces of the soft package battery core.

Optionally, the cylindrical cavity is axially divided into an upper part and a lower part, the upper part of the cylindrical cavity is in a circular truncated cone shape, and the lower part of the cylindrical cavity is in an inverted circular truncated cone shape.

Optionally, the insulating member and the first half shell are connected in a snap fit manner; the insulating part is connected with the second half shell in a buckling mode.

Optionally, one side of the insulating member, which is close to the first half shell, is provided with a first clamping groove, and the open end of the first half shell is clamped with the first clamping groove.

Optionally, the open end of the first half shell is provided with a first flange, and the first flange is clamped with the first clamping groove.

Optionally, one side of the insulating part, which is close to the second half shell, is provided with a second clamping groove, and the open end of the second half shell is clamped with the second clamping groove.

Optionally, a second flange is arranged at the opening end of the second half shell, and the second flange is clamped with the second clamping groove.

Optionally, the insulator is injection molded on the first half shell; or

The insulator is injection molded on the second half shell.

Optionally, the soft packaging core comprises a soft packaging shell and a pole core, wherein the soft packaging shell comprises an inner shell wrapping the pole core and a folded edge sealing the inner shell; the first tab is led out from the pole core and penetrates out of the soft cladding shell from the folded edge, and the second tab is led out from the pole core and penetrates out of the soft cladding shell from the folded edge;

the first electrode lug is welded with the first half shell, and a first insulating layer is attached to the part of the first electrode lug, which is exposed out of the soft shell, except the welding point;

and the second lug is welded with the second half shell, and a second insulating layer is attached to the part of the second lug, which is exposed out of the soft cladding, except the welding point.

According to the button battery provided by the embodiment of the utility model, the existing button battery adopts the upper shell and the lower shell to be connected in an insulating way to form a containing cavity for containing the soft-package battery cell, and the axis of the containing cavity is parallel to two axial end faces of the soft-package battery cell; the utility model discloses a button cell adopts half first shell and half second shell insulating connection to form the column cavity that holds the soft-packaged electrical core, and the axis of column cavity passes two axial terminal surfaces of soft-packaged electrical core, the utility model discloses button cell's positive negative pole can be drawn forth respectively from two axial terminal surfaces of button cell, can draw forth from button cell's side interval again, can also draw forth from button cell's the same terminal surface of axial, has increased button cell's electric current and has drawn forth the mode, has enlarged button cell's application range; and meanwhile, the first half shell and the second half shell connecting structure are more convenient to assemble compared with the existing upper and lower shell connecting structure, mass production is easy to realize, and the production efficiency is improved.

Drawings

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

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a schematic diagram of the exploded structure of FIG. 1;

fig. 4 is a schematic view of the structure of the insulating member of fig. 2.

The reference numerals in the specification are as follows:

1. a first half shell; 11. a first flange;

2. a second half shell; 21. a second flange;

3. an insulating member; 31. a first snap groove; 32. a second snap-fit groove;

4. soft-packaged battery cells; 41. an inner shell; 42. folding edges; 43. a first tab; 44. a second tab; 45. a first end face; 46. a second end face;

5. a columnar cavity; 6. a third insulating layer; 7. and a fourth insulating layer.

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 3, a button battery provided by an embodiment of the present invention includes a first half shell 1, a second half shell 2, an insulating member 3, and a soft package core 4; the opening of the first half-shell 1 is opposite to the opening of the second half-shell 2, and the insulating member 3 is connected between the open end of the first half-shell 1 and the open end of the second half-shell 2 so as to insulate the first half-shell 1 from the second half-shell 2;

the first half shell 1 and the second half shell 2 are in butt joint to form a columnar cavity 5 for accommodating the soft-package battery cell 4, and the axis of the columnar cavity 5 penetrates through two axial end faces of the soft-package battery cell 4;

the soft package battery cell 4 is arranged in the columnar cavity 5; the soft-packaged battery cell 4 is led out a first tab 43 and a second tab 44 which are different in polarity, the first tab 43 is electrically connected with the first half shell 1, and the second tab 44 is electrically connected with the second half shell 2.

Compared with the prior art, the button battery provided by the embodiment of the utility model adopts the upper shell and the lower shell which are connected in an insulating way to form a containing cavity for containing the soft-package battery cell 4, and the axis of the containing cavity is parallel to two axial end faces of the soft-package battery cell 4; the button battery of the utility model adopts the first half shell 1 and the second half shell 2 to form the columnar cavity 5 for accommodating the soft package battery core 4 in an insulation connection manner, and the axis of the columnar cavity 5 passes through two axial end faces of the soft package battery core 4, the positive and negative poles of the button battery can be respectively led out from the two axial end faces of the button battery and can be led out from the side face of the button battery at intervals, and can also be led out from the same axial end face of the button battery, so that the current leading-out mode of the button battery is increased, and the application range of the button battery is enlarged; meanwhile, the connecting structure of the first half shell 1 and the second half shell 2 is more convenient to assemble compared with the existing connecting structure of the upper shell and the lower shell, mass production is easy to realize, and the production efficiency is improved.

Specifically, as shown in fig. 3, the first half-shell 1 is a left half-shell and the second half-shell 2 is a right half-shell, with reference to the perspective of the drawing; the left half shell and the right half shell are connected through the insulating part, and assembly is more convenient compared with the existing connection of the upper shell and the lower shell.

In an embodiment, as shown in fig. 2, the columnar cavity 5 has a shape with a wide middle part and narrow ends, and an axis of the columnar cavity 5 is perpendicular to two axial end faces of the soft packing core 4; the first half shell 1 and the second half shell 2 are more attached to the soft package battery core 4, so that the overall structure of the button battery is more compact, the size of the button battery is reduced, and the reduction of the volume energy density of the button battery is avoided; simple structure, the assembly of being convenient for, easily mass production has improved production efficiency.

In one embodiment, as shown in fig. 2, the cylindrical cavity 5 is axially divided into an upper part and a lower part, the upper part of the cylindrical cavity 5 is in a circular truncated cone shape, and the lower part of the cylindrical cavity 5 is in an inverted circular truncated cone shape; the columnar cavity 5 is matched with the soft package battery core 4 in shape, so that the first half shell 1 and the second half shell 2 are more attached to the soft package battery core 4, the overall structure of the button battery is more compact, and the volume energy density of the button battery is improved; the contact area between the axial end face of the first half shell 1 and other electronic elements and the contact area between the axial end face of the second half shell 2 and other electronic elements are increased, so that the positive and negative electrodes of the button battery can be conveniently led out, and the electric connection stability of the button battery is improved.

In one embodiment, as shown in fig. 2, the insulating member 3 and the first half-shell 1 are snap-fitted; the insulating part 3 is buckled with the second half shell 2; firm in connection, simple structure, the assembly of being convenient for, easily mass production has improved production efficiency.

In an embodiment, as shown in fig. 2 to 4, a first fastening groove 31 is formed on one side of the insulating member 3 close to the first half-shell 1, and an open end of the first half-shell 1 is fastened to the first fastening groove 31; simple structure and convenient assembly.

Specifically, a first flange 11 is arranged at the opening end of the first half shell 1, and the first flange 11 is clamped with the first clamping groove 31; make button cell's overall structure more add compactly, first half shell 1 hugs closely more in laminate polymer core 4, reduces button cell's size.

In an embodiment, as shown in fig. 2 to 4, a second fastening groove 32 is disposed on one side of the insulating member 3 close to the second half-shell 2, and an open end of the second half-shell 2 is fastened to the second fastening groove 32; simple structure and convenient assembly.

Specifically, a second flange 21 is arranged at the opening end of the second half-shell 2, and the second flange 21 is clamped with the second clamping groove 32; make button cell's overall structure compacter, half shell 2 of second hugs closely more in laminate polymer core 4, reduces button cell's size.

In one embodiment, the insulating element 3 is injection-molded on the first half-shell 1; the stability that insulating part 3 and half first shell 1 are connected is improved, and the processing of being convenient for has reduced the assembly process degree of difficulty of insulating part 3, and the assembly of being convenient for easily mass production has improved production efficiency.

In another embodiment, the insulating element 3 is injection-moulded on the second half-shell 2; the stability that half shell 2 is connected of insulating part 3 and second is improved, and the processing of being convenient for has reduced the assembly process degree of difficulty of insulating part 3, and the assembly of being convenient for easily mass production has improved production efficiency.

In another embodiment, the insulator 3 is injection molded separately; the assembly is convenient, the mass production is easy, and the production efficiency is improved.

In one embodiment, as shown in fig. 3, the flexible package core 4 includes a flexible package shell and a pole core, the flexible package shell includes an inner shell 41 wrapping the pole core and a folded edge 42 sealing the inner shell 41; a first tab 43 leads from the pole core and out of the bladder at the fold 42 and a second tab 44 leads from the pole core and out of the bladder at the fold 42.

In one embodiment, not shown, the first tab 43 is welded to the first half-case 1, and a first insulating layer is attached to a portion of the first tab 43 exposed from the soft clad case except for the welding point; the first insulating layer plays an insulating protection role for the first tab 43, and short circuit inside the button cell is avoided.

In an embodiment, not shown, the second tab 44 is welded to the second half-shell 2, and a second insulating layer is attached to the second tab 44 except for the welding point of the portion exposed from the soft cover shell; the second insulating layer plays an insulating protection role for the second lug 44, and short circuit inside the button cell is avoided.

In one embodiment, as shown in fig. 2 and 3, a third insulating layer 6 is attached to the outer side wall of the flange 42; further play the effect of insulation protection, avoid button cell short circuit.

In an embodiment, as shown in fig. 2 and fig. 3, two axial end surfaces of the soft package core 4 are a first end surface 45 and a second end surface 46, the first tab 43 is welded to an inner wall of the first half shell 1 facing the first end surface 45 of the soft package core 4, and the second tab 44 is welded to an inner wall of the second half shell 2 facing the first end surface 45 of the soft package core 4; a fourth insulating layer 7 is attached to the first end face 45 of the soft-package battery cell 4; avoid the solder joint of first utmost point ear 43 and first half shell 1 and the solder joint of half shell 2 of second utmost point ear 44 and second to impale soft packet of shell and lead to the inside short circuit of button cell, strengthened the insulating nature between button cell positive pole and the negative pole, can protect soft packet of electricity core 4 better, improved button cell's safety in utilization.

Specifically, as shown in fig. 2 and 3, the lead-out positions of the first tab 43 and the second tab 44 are circumferentially different by 180 degrees; the distance between the first tab 43 and the second tab 44 is increased, so that the first tab 43 and the second tab 44 can be conveniently led out, and the interference between the first tab 43 and the second tab 44 is avoided.

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 a first half shell, a second half shell, an insulating piece and a soft package battery core; the opening of the first half shell is opposite to the opening of the second half shell, and the insulator is connected between the opening end of the first half shell and the opening end of the second half shell so as to insulate the first half shell from the second half shell;

2. The button battery according to claim 1, wherein the cylindrical cavity has a shape with a wide middle part and two narrow ends, and an axis of the cylindrical cavity is perpendicular to two axial end faces of the soft package core.

3. The button battery according to claim 2, wherein the cylindrical cavity is divided into an upper portion and a lower portion in the axial direction, the upper portion of the cylindrical cavity is in the shape of a circular truncated cone, and the lower portion of the cylindrical cavity is in the shape of an inverted circular truncated cone.

4. The button cell of claim 1, wherein the insulator is snap-fit to the first housing half; the insulating part is connected with the second half shell in a buckling mode.

5. The button cell according to claim 4, wherein a first clamping groove is formed in one side of the insulating member, which is close to the first half shell, and an open end of the first half shell is clamped with the first clamping groove.

6. The button cell according to claim 5, wherein a first flange is provided at an open end of the first half shell, and the first flange is engaged with the first engaging groove.

7. The button cell according to claim 4, wherein a second clamping groove is formed in one side of the insulating member, which is close to the second half shell, and an open end of the second half shell is clamped with the second clamping groove.

8. The button cell according to claim 7, wherein a second flange is provided at an open end of the second half shell, and the second flange is engaged with the second engaging groove.

9. The button cell according to claim 1, wherein the insulator is injection molded on the first half-shell; or

The insulator is injection molded on the second half shell.

10. The button cell of claim 1, wherein the pouch cell comprises a pouch shell and a pole core, the pouch shell comprising an inner shell surrounding the pole core and a flap sealing the inner shell; the first tab is led out from the pole core and penetrates out of the soft cladding shell from the folded edge, and the second tab is led out from the pole core and penetrates out of the soft cladding shell from the folded edge;