CN219998355U

CN219998355U - Button cell

Info

Publication number: CN219998355U
Application number: CN202321697175.3U
Authority: CN
Inventors: 林道岳; 苏钟湖; 韩晓辉
Original assignee: Huizhou Highpower Technology Co Ltd
Current assignee: Huizhou Highpower Technology Co Ltd
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2023-11-10
Anticipated expiration: 2033-06-29

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a button battery, which comprises a shell, a demagnetizing piece, an anode terminal and a winding electric core, wherein the winding electric core is arranged in the shell; the positive terminal and the positioning terminal extend along the axial direction of the winding battery core; the positive electrode of the winding electric core is electrically connected with a positive electrode terminal, and one end of the positive electrode terminal, which is far away from the winding electric core, extends along the axial direction of the winding electric core; along the axial direction of the winding cell, the distance between the positive terminal and the negative terminal is smaller than the distance between the positive terminal and the positioning terminal; the positioning terminal is located between the positive terminal and the negative terminal on a plane perpendicular to the axis of the wound cell. According to the utility model, the installation precision of the demagnetizing piece on the button battery is ensured, and the demagnetizing effect of the demagnetizing piece is ensured.

Description

Button cell

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a button battery.

Background

With the popularity and popularity of electronic devices such as wireless bluetooth headsets, button-type lithium ion batteries are widely used in electronic devices.

The current winding battery core in the button type lithium ion battery is generally a winding battery core, the winding battery core is formed by winding a positive plate, a diaphragm and a negative plate after being overlapped, the winding battery core can generate a magnetic field in the electrifying process, and the magnetic field of the winding battery core can interfere surrounding electromagnetic sensitive devices (such as a loudspeaker), so that the quality of electronic equipment is reduced, and the use experience of a user is reduced.

In order to reduce the influence of the magnetic field generated by the negative electrode lug on the electronic equipment, a degaussing member is generally required to be arranged on the button cell, and the magnetic field generated by the degaussing member is utilized to eliminate the magnetic field which is excessive by the negative electrode lug. However, the existing demagnetizing piece is installed on the button cell with lower precision, so that the demagnetizing effect of the demagnetizing piece on the button cell is not ideal.

Disclosure of Invention

The utility model provides a button battery aiming at the technical problem that the degaussing effect of a degaussing piece on the button battery is not ideal due to lower accuracy of the degaussing piece on the button battery in the prior art.

In view of the above technical problems, the embodiment of the utility model provides a button cell, which comprises a shell, a demagnetizing piece, an anode terminal and a winding electric core, wherein the winding electric core is arranged in the shell; the positive terminal and the positioning terminal extend along the axial direction of the winding battery core;

the positive electrode of the winding electric core is electrically connected with the positive electrode terminal, and one end of the positive electrode terminal, which is far away from the winding electric core, extends along the axial direction of the winding electric core;

along the axial direction of the winding cell, the distance between the positive terminal and the negative terminal is smaller than the distance between the positive terminal and the positioning terminal;

the positioning terminal is located between the positive terminal and the negative terminal on a plane perpendicular to the winding cell axis.

Optionally, the winding electric core is formed by winding positive plate and negative plate, the opposite ends of winding electric core are respectively equipped with the connection positive tab of positive plate and the connection negative tab of negative plate, the positive tab is kept away from the one end electricity of positive plate is connected positive terminal, degaussing piece passes through the casing electricity is connected positive tab.

Optionally, the winding cell has an arc of pi between the first connection and the second connection on a plane perpendicular to the axis of the winding cell; the first connecting part is a part of the positive tab connected with the positive plate, and the second connecting part is a part of the negative tab connected with the negative plate;

the degaussing block is provided with a bending part; on a plane perpendicular to the axis of the winding battery core, two opposite ends of the demagnetizing block are respectively overlapped with the first connecting part and the second connecting part.

Optionally, the winding cell has an arc of pi/2 between the third connection and the fourth connection on a plane perpendicular to the axis of the winding cell; the third connecting part is a part of the positive tab connected with the positive plate, and the fourth connecting part is a part of the negative tab connected with the negative plate;

the demagnetizing block is a rectangular demagnetizing plate; on a plane perpendicular to the axis of the winding cell, opposite ends of the rectangular demagnetizing plate are respectively overlapped with the third connecting portion and the fourth connecting portion.

Optionally, the button cell further comprises an insulating sleeve sleeved on the outer wall of the shell.

Optionally, the shell comprises an insulating cover with a conductive sleeve covered on the conductive sleeve, the winding battery cell is installed in the conductive sleeve, and the negative electrode lug is abutted with the inner wall of the conductive sleeve;

the insulating cover is provided with a through hole, and the positive terminal penetrates through the through hole and is electrically connected with the positive lug; the demagnetizing block is attached to and electrically connected with the end face of the conductive sleeve.

Optionally, the through hole is coaxially disposed with the winding cell.

Optionally, the button cell further comprises a first insulating sheet and a second insulating sheet, wherein the first insulating sheet is attached to the end face of the positive terminal, which is far away from the insulating cover; the second insulating sheet is installed between the conductive sleeve and the demagnetizing block, and is used for insulating the demagnetizing block except for the connecting part with the conductive sleeve.

Optionally, the second insulating sheet is a fan-shaped insulating sheet; and on a plane perpendicular to the axis of the winding electric core, the circle center of the fan-shaped insulating sheet coincides with the axis of the winding electric core.

Optionally, one end of the positive terminal, which is far away from the positive lug, is provided with a positive bending part extending towards the outer side of the winding battery cell;

one end of the negative terminal, which is far away from the degaussing block, is provided with a negative bending part extending towards the outer side of the winding battery cell;

one end of the positioning terminal, which is far away from the degaussing block, is provided with a positioning bending part extending towards the outer side of the winding battery cell.

In the utility model, the distance between the positive electrode terminal and the negative electrode terminal is smaller than the distance between the positive electrode terminal and the positioning terminal along the axial direction of the winding battery core; the free end of the positive terminal is closer to the bottom of the shell, so that the position of the demagnetizing piece mounted on the shell can be adjusted through the positioning terminal; in addition, along the axial direction of the winding battery core, the distance between the positive electrode terminal and the negative electrode terminal is smaller than the distance between the positive electrode terminal and the positioning terminal, so that the relative position between the positive electrode terminal and the demagnetizing piece can be adjusted through the free end of the positive electrode terminal, the installation accuracy of the demagnetizing piece on the button battery is further ensured, and the demagnetizing effect of the demagnetizing piece is ensured. In addition, the button cell has simple structure and low manufacturing cost.

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is a schematic structural view of a button cell according to a first embodiment of the present utility model;

fig. 2 is a schematic view of a part of the structure of a demagnetizing piece of a button cell according to a first embodiment of the present utility model;

FIG. 3 is a top view of a first embodiment of the present utility model providing a degaussing member and positive terminal mounted on a wound cell;

fig. 4 is a schematic structural view of a button cell according to a second embodiment of the present utility model;

fig. 5 is an exploded view of a button cell according to an embodiment of the present utility model.

Reference numerals in the specification are as follows:

1. a housing; 11. a conductive sleeve; 12. an insulating cover; 13. an insulating sleeve; 2. a demagnetizing member; 21. a degaussing block; 22. a negative electrode terminal; 221. a negative electrode bending portion; 23. positioning the terminal; 231. positioning the bending part; 3. a positive electrode terminal; 31. a positive electrode bending portion; 4. winding the battery cell; 41. a positive electrode tab; 42. a negative electrode ear; 5. a first insulating sheet; 6. and a second insulating sheet.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It is to be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", "middle", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the utility model.

As shown in fig. 1 and 2, an embodiment of the present utility model provides a button cell, which includes a housing 1, a degaussing member 2, a positive terminal 3 (i.e., a positive PIN), and a winding core 4 installed in the housing 1, where the degaussing member 2 includes a degaussing block 21, and a negative terminal 22 and a positioning terminal 23 both connected to the degaussing block 21, the degaussing block 21 is disposed opposite to an end surface of the housing 1, and an end portion of the degaussing block 21 away from the negative terminal 22 is electrically connected to a positive electrode of the winding core 4 through the housing 2; the positive terminal 22 and the positioning terminal 23 extend along the axial direction of the winding cell 4; as can be appreciated, the positive terminal 3 and the positioning terminal 23 are both located laterally of the housing 1; the negative electrode lug 42 is attached to the inner wall of the shell 1, and the demagnetizing block 21 is attached to the bottom of the shell 1 and electrically connected with the bottom of the shell 1.

The positive electrode of the winding electric core 4 is electrically connected with the positive electrode terminal 3, and one end of the positive electrode terminal 3, which is far away from the winding electric core 4, extends along the axial direction of the winding electric core 4; as will be appreciated, the positive terminal 3 extends from the upper end towards the lower end of the housing 1.

Along the axial direction of the winding cell 4, the distance between the positive terminal 3 and the negative terminal 22 is smaller than the distance between the positive terminal 3 and the positioning terminal 23; as can be appreciated, the positive terminal 3 is located above the negative terminal 22 and the positioning terminal 23; along the axial direction of the winding cell 4, the free end of the negative terminal 22 is located between the free end of the positive terminal 3 and the free end of the positioning terminal 23.

The positioning terminal 23 is located between the positive terminal 3 and the negative terminal 22 on a plane perpendicular to the axis of the winding cell 4. It will be appreciated that the distance between the free end of the positioning terminal 23 and the bottom of the case 1 is smaller than the distance between the free end of the negative terminal 22 and the bottom of the case 1.

Specifically, the opposite ends of the winding electric core 4 are respectively a positive electrode and a negative electrode, and the magnetic field of the winding electric core 4 is positive from the negative electrode to the positive electrode; the degaussing block 21 is electrically connected with the negative electrode of the winding electric core 4 through the shell 1, the current direction on the degaussing block 21 is equivalent to the clockwise direction (seen from the bottom view of the shell 1), and the magnetic field direction of the degaussing block 21 is opposite to the magnetic field direction generated by the winding electric core 4 according to the right-hand spiral rule, so that the degaussing block 21 can eliminate the magnetic field generated by the winding electric core 21, and the interference of the magnetic field generated by the winding electric core 4 on electronic products is avoided.

In the present utility model, the distance between the positive electrode terminal 3 and the negative electrode terminal 22 is smaller than the distance between the positive electrode terminal 3 and the positioning terminal 23 along the axial direction of the winding cell 4; since the free end of the positive terminal 3 is closer to the bottom of the case 1, the position of the demagnetizing pieces 2 mounted on the case 1 can be adjusted by the positioning terminal 23; in addition, along the axial direction of the winding cell 4, the distance between the positive terminal 3 and the negative terminal 22 is smaller than the distance between the positive terminal 3 and the positioning terminal 23, so that the relative position between the positive terminal 3 and the demagnetizing piece 2 can be adjusted through the free end of the positive terminal 3, the installation precision of the demagnetizing piece 2 on the button cell is further ensured, and the demagnetizing effect of the demagnetizing piece 2 is ensured. In addition, the button cell has simple structure and low manufacturing cost.

In an embodiment, the winding core 4 is formed by winding a positive electrode plate (not shown in the figure) and a negative electrode plate (not shown in the figure), two opposite ends of the winding core 4 are respectively provided with a positive electrode lug 41 connected with the positive electrode plate and a negative electrode lug 42 connected with the negative electrode plate, one end, far away from the positive electrode plate, of the positive electrode lug 41 is electrically connected with the positive electrode terminal 3, the demagnetizing block 21 is electrically connected with the negative electrode lug 42 through the shell 1, and the demagnetizing block 21 is used for demagnetizing a magnetic field additionally generated by the negative electrode lug 42. As can be appreciated, the separator is disposed between the positive electrode sheet and the negative electrode sheet, so that no conduction occurs between the positive electrode sheet and the negative electrode sheet, the winding process of the winding cell 4 is a technology well known to those skilled in the art, and will not be described herein, the housing 1 is a steel shell with electrical conductivity, the positive electrode tab 41 is folded at the upper end of the winding cell 4, and the negative electrode tab 42 is folded at the lower end of the winding cell 4; and the length of the negative electrode tab 42 is greater than the length of the positive electrode tab 41.

Specifically, the winding turns of the positive plate and the negative plate are the same, and the current directions on the positive plate and the negative plate are opposite, so that the magnetic fields generated by the positive plate and the negative plate can be mutually offset; the directions of the currents on the positive electrode lug 41 and the negative electrode lug 42 are opposite, and the length of the negative electrode lug 42 is larger than that of the positive electrode lug 41, so that a part of the magnetic field generated by the negative electrode lug 42 counteracts the magnetic field generated by the positive electrode lug 41, another part of the magnetic field generated by the negative electrode lug 42 interferes with the electronic product, the magnetic field generated by the demagnetizing block 21 is opposite to that generated by the negative electrode lug 42, and the magnetic field generated by the demagnetizing block 21 counteracts the magnetic field generated by the negative electrode lug 41, namely, the demagnetizing block 21 can eliminate the magnetic field of the winding cell 4.

In an embodiment, as shown in fig. 2 and 3, on a plane perpendicular to the axis of the winding core 4, a portion of the positive electrode tab 41 connected to the positive electrode tab coincides with a portion of the demagnetizing block 21 remote from the demagnetizing block 21 connected to the positive electrode terminal 3, and a portion of the negative electrode tab 42 connected to the negative electrode tab coincides with an end of the demagnetizing block 21 remote from the negative electrode terminal 22; that is, on a plane perpendicular to the axis of the winding cell 4, opposite ends of the demagnetizing pieces 21 are overlapped with two connection portions of the positive electrode tab 41 and the negative electrode tab 42, respectively, which connect the winding cell 4. It is understood that, according to the manufacturing process of the wound battery, the positive tab 41 and the negative tab 42 are not on the same straight line, and the positive tab 41 and the negative tab 42 are disposed at opposite ends of the wound battery cell 4 in a staggered manner. In this embodiment, the demagnetizing block 21 may make up the gap between the positive electrode lug 41 and the negative electrode lug 42, so that it is further ensured that the demagnetizing block 21 may counteract the magnetic field generated by the negative electrode lug 42, thereby further improving the demagnetizing effect of the button cell.

In one embodiment, as shown in fig. 4 and 5, the arc of the winding cell 4 between the first connection portion and the second connection portion is pi in a plane perpendicular to the axis of the winding cell 4; the first connecting part is a part of the positive electrode tab 41 connected with the positive electrode sheet, and the second connecting part is a part of the negative electrode tab 42 connected with the negative electrode sheet; it is to be understood that the connection line between the positive electrode tab 41 and the center point of the winding cell 4 is a first connection line, the connection line between the negative electrode tab 42 and the center point of the winding cell 4 is a second connection line, and the included angle between the first connection line and the second connection line is 180 degrees.

A bending part is arranged on the degaussing block 21; on a plane perpendicular to the axis of the winding cell 4, opposite ends of the demagnetizing block 21 are respectively overlapped with the first and second connection portions. As can be appreciated, the connection between the opposite ends of the degaussing block 21 extends in the radial direction of the winding cell 4; that is, opposite ends of the demagnetizing block 21 are respectively located at half circular arcs of the housing 1. In this embodiment, the demagnetizing piece 2 has a simple structure and low manufacturing cost.

In one embodiment, as shown in fig. 1 and 2, the arc of the winding cell 4 between the third connection and the fourth connection is pi/2 in a plane perpendicular to the axis of the winding cell 4; the third connecting part is a part of the positive electrode tab 41 connected with the positive electrode sheet, and the fourth connecting part is a part of the negative electrode tab 42 connected with the negative electrode sheet; it may be understood that the connection line between the positive electrode tab 41 and the center point of the winding cell 4 is a third connection line, the connection line between the negative electrode tab 42 and the center point of the winding cell 4 is a fourth connection line, and the included angle between the third connection line and the fourth connection line is 90 degrees.

The demagnetizing blocks 21 are rectangular demagnetizing plates; on a plane perpendicular to the axis of the winding cell 4, opposite ends of the rectangular demagnetizing plate are respectively overlapped with the third connecting portion and the fourth connecting portion. It will be appreciated that the opposite ends of the demagnetizing blocks 21 are located in a quarter-circular arc position with respect to the housing 1, respectively. In this embodiment, the winding core 4 has a simple structure and low manufacturing cost.

In an embodiment, as shown in fig. 1 and 5, the button cell further comprises an insulating sleeve 13 sleeved on the outer wall of the casing 1. As will be appreciated, the insulating sleeve 13 may ensure insulation between the positive terminal 3, the negative terminal 22 and the positioning terminal 23 and the sleeve outer side wall.

In one embodiment, as shown in fig. 5, the housing 1 includes an insulating cover 12 with a conductive sleeve 11 covering the conductive sleeve 11, the winding cell 4 is installed in the conductive sleeve 11, and the negative electrode lug 42 abuts against the inner wall of the conductive sleeve 11; it will be appreciated that the insulating cover 12 may seal the wound cell 4 within the conductive sleeve 11, the conductive sleeve 11 being a steel shell, the conductive sleeve 11 being electrically connected to the negative electrode tab 42, such that the conductive sleeve 11 is the negative electrode of the wound cell 4.

The insulating cover 12 is provided with a through hole, and the positive electrode terminal 3 passes through the through hole and is electrically connected with the positive electrode lug 41; the demagnetizing blocks 21 are attached to and electrically connected with the end face of the conductive sleeve 11. It will be appreciated that the insulating cover 12 can avoid the positive tab 41 from being electrically connected to the positive terminal 3 (i.e., the positive conductive portion) without being electrically connected to other components of the winding core 4, thereby ensuring the insulation of the button cell.

In one embodiment, as shown in fig. 5, the through hole is disposed coaxially with the winding cell 4. It will be appreciated that the through hole is disposed at the central position of the insulating cover 12, that is, the through hole is located directly above the winding electric core 4 and is coaxially disposed with the winding electric core 4, so that one end of the positive electrode tab 41 away from the positive electrode sheet extends to the central position of the winding electric core 4, and the positive electrode terminal 3 is electrically connected with the positive electrode tab 41 at the central position of the winding electric core 4 through the through hole, so that the accuracy of mounting the positive electrode terminal 3 on the housing 1 is further ensured.

In one embodiment, as shown in fig. 5, the button cell further includes a first insulating sheet 5 and a second insulating sheet 6, where the first insulating sheet 5 is attached to an end surface of the positive terminal 3 away from the insulating cover 12; the second insulating sheet 6 is installed between the conductive sleeve 11 and the demagnetizing blocks 21, and the second insulating sheet 6 is used to insulate the demagnetizing blocks 21 except for the connection portion with the conductive sleeve 11. As can be appreciated, the positive electrode conductive portion of the positive electrode terminal 3 is provided between the insulating cover 12 and the first insulating sheet 5, so that the insulating cover 12 and the first insulating sheet 5 can avoid the positive electrode conductive portion from being electrically connected to other components; the second insulating sheet 6 ensures the tightness of the electrical connection of the demagnetizing block 21 to the bottom of the casing 1.

In one embodiment, as shown in fig. 1 and 3, the second insulating sheet 6 is a fan-shaped insulating sheet; on a plane perpendicular to the axis of the winding electric core 4, the circle center of the fan-shaped insulating sheet coincides with the axis of the winding electric core 4; that is, the circle center of the fan-shaped insulating sheet coincides with the circle center of the housing 1, and the fan-shaped insulating sheet is mounted between the bottom of the housing 1 and the insulating block, so that the mounting position of the demagnetizing piece 2 can be adjusted through the fan-shaped insulating sheet, and the mounting precision of the demagnetizing piece 2 is further ensured.

In one embodiment, as shown in fig. 2, an end of the positive terminal 3 away from the positive tab 41 is provided with a positive bending portion 31 extending towards the outside of the winding cell 4; it will be appreciated that the positive electrode bending portion 31 is parallel to the end face of the case 1.

A negative electrode bending part 221 extending towards the outer side of the winding cell 4 is arranged at one end of the negative electrode terminal 22 away from the demagnetizing block 21; it is understood that the negative electrode bending portion 221 is parallel to the end surface of the case 1.

One end of the positioning terminal 23, which is far away from the demagnetizing block 21, is provided with a positioning bending portion 231 extending towards the outer side of the winding cell 4. It will be appreciated that the positioning bent portion 231 is parallel to the end surface of the housing 1. In this embodiment, the design of the positive electrode bending portion 31, the negative electrode bending portion 221, and the positioning bending portion 231 improves the convenience of connecting the button cell with an external electric device.

The above embodiments of the button cell of the present utility model are merely examples, and are not intended to limit the present utility model, any modifications, equivalents, improvements, etc. made within the spirit and principles of the present utility model should be included in the scope of the present utility model.

Claims

1. The button battery is characterized by comprising a shell, a demagnetizing piece, an anode terminal and a winding electric core arranged in the shell, wherein the demagnetizing piece comprises a demagnetizing block, a cathode terminal and a positioning terminal, the cathode terminal and the positioning terminal are connected with the demagnetizing block, the demagnetizing block is opposite to the end face of the shell, and the end part, far away from the cathode terminal, of the demagnetizing block is electrically connected with the anode of the winding electric core through the shell; the positive terminal and the positioning terminal extend along the axial direction of the winding battery core;

2. The button cell of claim 1, wherein the winding core is formed by winding a positive plate and a negative plate, opposite ends of the winding core are respectively provided with a positive electrode lug connected with the positive plate and a negative electrode lug connected with the negative plate, one end of the positive electrode lug, which is far away from the positive plate, is electrically connected with the positive electrode terminal, and the degaussing block is electrically connected with the negative electrode lug through the shell.

3. The button cell of claim 2, wherein on a plane perpendicular to the winding cell axis, a portion of the positive tab connected to the positive tab coincides with a portion of the degaussing block remote from the degaussing block connected to the positive terminal, and a portion of the negative tab connected to the negative tab coincides with an end of the degaussing block remote from the negative terminal.

4. The button cell of claim 2, wherein the winding cell has a curvature pi between the first connection and the second connection in a plane perpendicular to the winding cell axis; the first connecting part is a part of the positive tab connected with the positive plate, and the second connecting part is a part of the negative tab connected with the negative plate;

5. The button cell of claim 2, wherein the winding cell has a curvature of pi/2 between the third connection and the fourth connection in a plane perpendicular to the winding cell axis; the third connecting part is a part of the positive tab connected with the positive plate, and the fourth connecting part is a part of the negative tab connected with the negative plate;

6. The button cell of claim 2, wherein the housing comprises an insulating cover with a conductive sleeve covering the conductive sleeve, the wound cell is mounted within the conductive sleeve, and the negative electrode tab abuts an inner wall of the conductive sleeve;

7. The button cell of claim 6, wherein the through-hole is disposed coaxially with the winding cell.

8. The button cell of claim 6, further comprising a first insulating sheet and a second insulating sheet, wherein the first insulating sheet is attached to an end face of the positive terminal remote from the insulating cover; the second insulating sheet is installed between the conductive sleeve and the demagnetizing block, and is used for insulating the demagnetizing block except for the connecting part with the conductive sleeve.

9. The button cell of claim 8, wherein the second insulating sheet is a fan-shaped insulating sheet; and on a plane perpendicular to the axis of the winding electric core, the circle center of the fan-shaped insulating sheet coincides with the axis of the winding electric core.

10. The button cell of claim 2, wherein an end of the positive terminal remote from the positive tab is provided with a positive bending portion extending toward the outside of the winding cell;