Button cell with demagnetization function

Abstract

The utility model provides a button cell with a demagnetization function. The button cell with the demagnetization function comprises a cell body, a positive electrode connecting piece and a negative electrode connecting piece, the battery body comprises a negative shell, a positive shell and a winding battery cell; the cathode shell comprises a cathode end piece and a cathode cylinder. The anode shell comprises an anode end piece and an anode cylinder. The positive electrode connecting piece comprises a positive electrode welding part, a positive electrode demagnetization part and a positive electrode interface part; the anode welding part is welded on the anode cylinder; the positive electrode demagnetizing part is in a long arc shape and extends along the circumferential direction of the positive electrode cylinder. The negative electrode connecting piece comprises a negative electrode welding part, a negative electrode extension part, a negative electrode demagnetization part and a negative electrode interface part; the negative electrode welding part is welded on the negative electrode end sheet; the cathode degaussing part and the cathode interface part are both arranged outside the anode cylinder, the cathode degaussing part is in a long arc shape and extends in the circumferential direction of the anode cylinder, and the cathode interface part is located between the cathode degaussing part and the anode interface part. The button cell with the degaussing function is relatively small in axial size, and can be arranged in some electronic products with relatively small sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of button batteries, in particular to a button battery with a demagnetization function. Background Art

[0002] In a button battery with a wound cell, the positive electrode sheet, insulating sheet, and negative electrode sheet are laminated to form a strip-shaped cell, which is then wound around a core column to form a wound cell. The negative electrode sheet is generally placed on the outside of the strip-shaped cell, so the length of the negative electrode sheet is greater than that of the positive electrode sheet, resulting in the length of the negative electrode sheet wound around the core column also being greater than that of the positive electrode sheet. According to the right-hand screw rule, this extra negative electrode sheet will generate a magnetic field perpendicular to the plane of the button battery when the current changes, forming electromagnetic radiation. As the design of smart wearable electronic products becomes more and more compact, in more and more applications, the electromagnetic field generated by the button battery will interfere with the operation of other electronic devices, generating some low-noise that affects the user experience of electronic products. To address this issue, arc-shaped positive and negative electrode connectors can be welded to the battery body. The magnetic field generated by the positive and negative electrode connectors is in the opposite direction of the magnetic field of the wound cell, which can reduce the magnetic field of the wound cell. Battery bodies of the same battery capacity are usually standard sizes. The button-type battery with demagnetization function in the prior art has an axial size that becomes larger after the positive electrode connecting piece and the negative electrode connecting piece are welded, and cannot be installed in certain smaller electronic products.

[0003] Therefore, it is necessary to provide a button battery with a degaussing function to solve the above technical problems. Utility Model Content

[0004] The utility model provides a button-type battery with a demagnetization function. The battery has a small axial dimension and can be installed in certain electronic products with a small volume.

[0005] The technical solution of the utility model is:

[0006] A button battery with a degaussing function, comprising:

[0007] The battery body comprises a negative electrode shell, a positive electrode shell and a wound battery cell; the negative electrode shell comprises a negative terminal sheet and a negative electrode barrel; the positive electrode shell comprises a positive terminal sheet and a positive electrode barrel; the positive electrode barrel is sleeved on the outside of the negative electrode barrel; the wound battery cell is located in the space formed by the negative electrode shell and the positive electrode shell;

[0008] A positive electrode connecting piece, which is arranged on the outside of the positive electrode barrel, and includes a positive electrode welding portion, a positive electrode demagnetizing portion, and a positive electrode interface portion connected in sequence; the positive electrode welding portion is welded to the positive electrode barrel; the positive electrode demagnetizing portion is in the shape of an elongated arc and extends along the circumference of the positive electrode barrel; the positive electrode interface portion is used to connect to electronic product components; the direction from the positive electrode welding portion to the positive electrode interface portion is opposite to the current direction of the wound battery cell; and,

[0009] A negative pole connecting plate, comprising a negative pole welding portion, a negative pole extension portion, a negative pole demagnetization portion and a negative pole interface portion connected in sequence; the negative pole welding portion is welded to the negative pole terminal plate; the negative pole demagnetization portion and the negative pole interface portion are both arranged on the outside of the positive pole cylinder, the negative pole demagnetization portion is a long arc shape, and extends along the circumference of the positive pole cylinder, the negative pole interface portion is located between the negative pole demagnetization portion and the positive pole interface portion, and the negative pole interface portion is used to connect with electronic product components; the negative pole extension portion, the negative pole demagnetization portion, the negative pole interface portion, the positive pole demagnetization portion and the positive pole interface portion are all insulated from the positive pole cylinder.

[0010] In the button-type battery with demagnetization function described in the present invention, along the axial direction of the battery body, both sides of the positive electrode welding part protrude from the positive electrode demagnetization part, and both sides of the negative electrode welding part protrude from the negative electrode demagnetization part.

[0011] In the button-type battery with demagnetization function described in the present invention, the positive pole demagnetization portion and the negative pole demagnetization portion are located at the same axial position of the positive pole cylinder.

[0012] In the button-type battery with demagnetization function described in the present invention, the negative electrode welding portion is located in the axial middle position of the positive electrode cylinder.

[0013] In the button battery with demagnetization function described in the present invention, the positive electrode interface portion is perpendicular to the positive electrode tube and extends in a direction away from the positive electrode tube; the negative electrode interface portion is perpendicular to the positive electrode tube and extends in a direction away from the positive electrode tube.

[0014] In the button-type battery with demagnetization function described in the present invention, the negative pole extension portion, the negative pole demagnetization portion and the positive pole demagnetization portion are all bonded to the positive pole cylinder via an insulating adhesive layer.

[0015] In the button-type battery with demagnetization function described in the utility model, the thickness of the insulating rubber layer is 0.04mm-0.1mm.

[0016] In the button-type battery with demagnetization function described in the present invention, the negative electrode welding portion is located at the edge of the negative terminal plate, and the two are in contact with each other, and the negative electrode extension portion is arranged along the axial direction of the battery body.

[0017] In the button-type battery with demagnetization function described in the present invention, the negative pole demagnetization portion and the positive pole demagnetization portion have the same length.

[0018] In the button-type battery with demagnetization function described in the present invention, the positive electrode welding portion is laser welded to the positive electrode barrel, and the negative electrode welding portion is laser welded to the negative terminal piece.

[0019] Compared with the prior art, the present invention has the following beneficial effects: in the button-type battery with demagnetization function, the negative electrode connecting piece of the present invention is electrically connected to the negative electrode of the battery body through the negative electrode welding part, and the positive electrode connecting piece is electrically connected to the positive electrode of the battery body through the positive electrode welding part. The negative electrode demagnetization part and the positive electrode demagnetization part are both long arc-shaped, and the current direction of the two is opposite to the current direction of the wound battery cell, so that the magnetic field generated by the two can offset the magnetic field generated by the wound battery cell. At the same time, the positive electrode connecting piece is arranged on the peripheral side of the battery body, which can make the axial dimension of the entire product smaller and can be installed in certain smaller electronic products. The negative electrode interface part is located between the negative electrode demagnetization part and the positive electrode interface part, and the negative electrode interface part and the positive electrode interface part are close to each other, which is convenient for connection with electronic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the present invention.

[0021] Figure 1 This is a schematic structural diagram of a button battery with degaussing function provided in a preferred embodiment of the present utility model.

[0022] Figure 2 This is a schematic diagram of the exploded structure of a button battery with degaussing function provided in a preferred embodiment of the present utility model.

[0023] in,

[0024] 11. Battery body,

[0025] 111, negative electrode shell, 1111, negative terminal piece, 1112, negative electrode cylinder,

[0026] 112, positive electrode shell, 1121, positive electrode cylinder,

[0027] 12. Positive electrode connecting piece, 121. Positive electrode welding part, 122. Positive electrode demagnetization part, 123. Positive electrode interface part,

[0028] 13. Negative electrode connecting piece, 131. Negative electrode welding portion, 132. Negative electrode extension portion, 133. Negative electrode demagnetization portion, 134. Negative electrode interface portion,

[0029] 14. Insulation layer.

[0030] In the figures, structurally similar elements are denoted by the same reference numerals. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0032] Directional terms mentioned in this invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are only used with reference to the directions of the drawings. The directional terms used are used to illustrate and understand the invention, and are not intended to limit the invention.

[0033] The terms "first" and "second" in the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, nor as limiting the order of precedence.

[0034] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0035] In a button battery with a wound cell, the positive electrode sheet, insulating sheet, and negative electrode sheet are laminated to form a strip-shaped cell, which is then wound around a core column to form a wound cell. The negative electrode sheet is generally placed on the outside of the strip-shaped cell, so the length of the negative electrode sheet is greater than that of the positive electrode sheet, resulting in the length of the negative electrode sheet wound around the core column also being greater than that of the positive electrode sheet. According to the right-hand screw rule, this extra negative electrode sheet will generate a magnetic field perpendicular to the plane of the button battery when the current changes, forming electromagnetic radiation. As the design of smart wearable electronic products becomes more and more compact, in more and more applications, the electromagnetic field generated by the button battery will interfere with the operation of other electronic devices, generating some low-noise that affects the user experience of electronic products. To address this issue, arc-shaped positive and negative electrode connectors can be welded to the battery body. The magnetic field generated by the positive and negative electrode connectors is in the opposite direction of the magnetic field of the wound cell, which can reduce the magnetic field of the wound cell. Battery bodies of the same battery capacity are usually standard sizes. The button-type battery with demagnetization function in the prior art has an axial size that becomes larger after the positive electrode connecting piece and the negative electrode connecting piece are welded, and cannot be installed in certain smaller electronic products.

[0036] The following is a preferred embodiment of a button battery with a degaussing function provided by the present invention that can solve the above technical problems.

[0037] Please refer to Figure 2 The preferred embodiment of the present utility model provides a button-type battery with a demagnetization function, which includes a battery body 11, a positive electrode connecting piece 12 and a negative electrode connecting piece 13.

[0038] Please refer to Figure 1 The battery body 11 includes a negative electrode case 111, a positive electrode case 112, and a wound battery cell. The negative electrode case 111 includes a negative terminal sheet 1111 and a negative electrode canister 1112; the positive electrode case 112 includes a positive terminal sheet and a positive electrode canister 1121. The positive electrode canister 1121 is sleeved outside the negative electrode canister 1112. The wound battery cell is located within the space formed by the negative electrode case 111 and the positive electrode case 112.

[0039] The positive electrode connecting piece 12 is arranged on the outside of the positive electrode barrel 1121. The positive electrode connecting piece 12 includes a positive electrode welding portion 121, a positive electrode demagnetization portion 122 and a positive electrode interface portion 123 connected in sequence. The positive electrode welding portion 121 is welded to the positive electrode barrel 1121. The positive electrode demagnetization portion 122 is in the shape of a long arc and extends along the circumference of the positive electrode barrel 1121. The positive electrode interface portion 123 is perpendicular to the positive electrode barrel 1121 and extends in a direction away from the positive electrode barrel 1121. The positive electrode interface portion 123 is used to connect to electronic product components. The direction from the positive electrode welding portion 121 to the positive electrode interface portion 123 is opposite to the current direction of the wound battery cell.

[0040] The negative electrode connecting plate 13 includes a negative electrode welding portion 131, a negative electrode extension portion 132, a negative electrode demagnetization portion 133, and a negative electrode interface portion 134, which are connected in sequence. The negative electrode welding portion 131 is welded to the negative electrode terminal 1111. The negative electrode demagnetization portion 133 and the negative electrode interface portion 134 are both arranged on the outside of the positive electrode barrel 1121. The negative electrode demagnetization portion 133 is an elongated arc and extends along the circumference of the positive electrode barrel 1121. The negative electrode interface portion 134 is located between the negative electrode demagnetization portion 133 and the positive electrode interface portion 123. The negative electrode interface portion 134 is perpendicular to the positive electrode barrel 1121 and extends away from the positive electrode barrel 1121. The negative electrode interface portion 134 is used to connect to electronic product components. The negative electrode extension portion 132, the negative electrode demagnetization portion 133, the negative electrode interface portion 134, the positive electrode demagnetization portion 122, and the positive electrode interface portion 123 are all insulated from the positive electrode barrel 1121. Figure 1 In the figure, the solid arrows indicate the direction of the current in the outer ring of the wound battery core, and the dotted arrows indicate the direction of the current in the positive pole demagnetization unit 122 and the negative pole demagnetization unit 133. Figure 2 In the figure, the solid arrows indicate the direction of the magnetic field of the wound battery core, and the dotted arrows indicate the direction of the magnetic field of the positive pole demagnetizing unit 122 and the negative pole demagnetizing unit 133 .

[0041] The button-type battery with demagnetization function of the present invention has a negative electrode connecting piece 13 electrically connected to the negative electrode of the battery body 11 through a negative electrode welding portion 131, and a positive electrode connecting piece 12 electrically connected to the positive electrode of the battery body 11 through a positive electrode welding portion 121. The negative electrode demagnetization portion 133 and the positive electrode demagnetization portion 122 are both long arc-shaped, and the current direction of the two is opposite to the current direction of the wound battery cell, so that the magnetic field generated by the two can offset the magnetic field generated by the wound battery cell. At the same time, the positive electrode connecting piece 12 is arranged on the side of the battery body 11, which can make the axial dimension of the entire product smaller and can be installed in certain smaller electronic products. The negative electrode interface portion 134 is located between the negative electrode demagnetization portion 133 and the positive electrode interface portion 123. The negative electrode interface portion 134 and the positive electrode interface portion 123 are close to each other, which is convenient for connection with electronic products.

[0042] Please refer to Figure 1 Along the axial direction of the battery body 11, both sides of the positive electrode welding portion 121 protrude beyond the positive electrode demagnetizing portion 122, making the positive electrode welding portion 121 larger and increasing the welding area with the positive electrode barrel 1121, thereby ensuring a secure connection between the two. Both sides of the negative electrode welding portion 131 protrude beyond the negative electrode demagnetizing portion 133, thereby increasing the contact area with the negative terminal 1111, ensuring a secure connection between the two.

[0043] Please continue to refer to Figure 1 The positive electrode connecting piece 12 and the negative electrode connecting piece 13 are both integrally formed, making both easy to prepare and relatively strong.

[0044] Please continue to refer to Figure 1The positive pole demagnetization part 122 and the negative pole demagnetization part 133 are located at the same axial position of the positive pole cylinder 1121, so as to avoid the mutual influence of the magnetic fields generated by the positive pole demagnetization part 122 and the negative pole demagnetization part 133, and also facilitate the connection between the positive pole interface part 123 and the negative pole interface part 134 and the components of electronic products.

[0045] Please continue to refer to Figure 1 The negative electrode welding portion 131 is located in the axial middle position of the positive electrode barrel 1121, which facilitates welding of the negative electrode welding portion 131 and the positive electrode barrel 1121.

[0046] The positive electrode interface portion 123 is perpendicular to the positive electrode barrel 1121 and extends away from the positive electrode barrel 1121; the negative electrode interface portion 134 is perpendicular to the positive electrode barrel 1121 and extends away from the positive electrode barrel 1121. With this structure, the positive electrode interface portion 123 and the negative electrode interface portion 134 can be inserted into electronic product components, making the connection convenient and secure.

[0047] Please continue to refer to Figure 1 The negative pole extension part 132, the negative pole demagnetization part 133 and the positive pole demagnetization part 122 are all bonded to the positive pole cylinder 1121 through the insulating rubber layer 14, which not only insulates the negative pole extension part 132, the negative pole demagnetization part 133 and the positive pole demagnetization part 122 from the positive pole cylinder 1121, but also fixes the negative pole extension part 132, the negative pole demagnetization part 133 and the positive pole demagnetization part 122 to the positive pole cylinder 1121, preventing the negative pole extension part 132, the negative pole demagnetization part 133 and the positive pole demagnetization part 122 from displacement or deformation during transportation.

[0048] Please continue to refer to Figure 1 The thickness of the insulating rubber layer 14 is 0.04mm-0.1mm, which can ensure that the negative pole extension part 132, the negative pole demagnetization part 133 and the positive pole demagnetization part 122 are firmly bonded to the positive pole cylinder 1121 without making the insulating rubber layer 14 too thick, thereby saving raw materials for processing the insulating rubber layer 14.

[0049] Please continue to refer to Figure 1 The negative electrode welding portion 131 is located at the edge of the negative terminal piece 1111, and the two are in contact with each other, which makes the axial dimension of the entire button battery smaller. The negative electrode extension portion 132 is arranged along the axial direction of the battery body 11, which can make the negative electrode extension portion 132 shorter, saving the raw materials for processing the negative electrode connecting piece 13.

[0050] Please continue to refer to Figure 1 The negative pole demagnetization part 133 and the positive pole demagnetization part 122 have the same length, which can make the negative pole demagnetization part 133 and the positive pole demagnetization part 122 generate magnetic fields of the same strength, evenly share the task of generating the magnetic field, and also facilitate determining the length of the negative pole demagnetization part 133 and the positive pole demagnetization part 122.

[0051] Please continue to refer to Figure 1 The positive electrode welding portion 121 is laser welded to the positive electrode barrel 1121 , and the negative electrode welding portion 131 is laser welded to the negative terminal piece 1111 , which can improve welding efficiency and welding quality.

[0052] The working principle of the button battery with degaussing function in the preferred embodiment of the utility model is as follows:

[0053] The current direction of the wound battery cell is counterclockwise, and the magnetic field generated is upward; the current direction of the negative pole demagnetization part 133 and the positive pole demagnetization part 122 is clockwise, and the magnetic field generated is downward; the magnetic field generated by the negative pole demagnetization part 133 and the positive pole demagnetization part 122 is opposite to the direction of the magnetic field generated by the wound battery cell, and can reduce the magnetic field generated by the wound battery cell.

[0054] This is the working principle of the button battery with degaussing function in this preferred embodiment.

[0055] In other embodiments, the positive electrode interface portion 123 and the negative electrode interface portion 134 can be attached to the positive electrode barrel 1121 , and the positive electrode interface portion 123 and the negative electrode interface portion 134 are insulated from the positive electrode barrel 1121 by an insulating adhesive layer 14 .

[0056] The button-type battery with demagnetization function of the present invention has a negative electrode connecting piece electrically connected to the negative electrode of the battery body via a negative electrode welding portion, and a positive electrode connecting piece electrically connected to the positive electrode of the battery body via a positive electrode welding portion. Both the negative and positive electrode demagnetization portions are elongated arc-shaped, and the current direction of the two portions is opposite to the current direction of the wound battery cell, so that the magnetic field generated by the two portions can offset the magnetic field generated by the wound battery cell. At the same time, the positive electrode connecting piece is arranged on the circumference of the battery body, which can reduce the axial size of the entire product and can be installed in certain smaller electronic products. The negative electrode interface portion is located between the negative electrode demagnetization portion and the positive electrode interface portion, and the negative electrode interface portion and the positive electrode interface portion are close to each other, which facilitates connection with electronic products.

[0057] To sum up, although the present invention has been disclosed as above in terms of preferred embodiments, the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent substitutions or changes based on the concept of the technical solution of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A button battery with degaussing function, characterized in that: include: The battery body comprises a negative electrode shell, a positive electrode shell and a wound battery cell; the negative electrode shell comprises a negative terminal sheet and a negative electrode barrel; the positive electrode shell comprises a positive terminal sheet and a positive electrode barrel; the positive electrode barrel is sleeved on the outside of the negative electrode barrel; the wound battery cell is located in the space formed by the negative electrode shell and the positive electrode shell; A positive electrode connecting piece, which is arranged on the outside of the positive electrode barrel, and includes a positive electrode welding portion, a positive electrode demagnetizing portion, and a positive electrode interface portion connected in sequence; the positive electrode welding portion is welded to the positive electrode barrel; the positive electrode demagnetizing portion is in the shape of an elongated arc and extends along the circumference of the positive electrode barrel; the positive electrode interface portion is used to connect to electronic product components; the direction from the positive electrode welding portion to the positive electrode interface portion is opposite to the current direction of the wound battery cell; and, A negative pole connecting plate, comprising a negative pole welding portion, a negative pole extension portion, a negative pole demagnetization portion and a negative pole interface portion connected in sequence; the negative pole welding portion is welded to the negative pole terminal plate; the negative pole demagnetization portion and the negative pole interface portion are both arranged on the outside of the positive pole cylinder, the negative pole demagnetization portion is a long arc shape, and extends along the circumference of the positive pole cylinder, the negative pole interface portion is located between the negative pole demagnetization portion and the positive pole interface portion, and the negative pole interface portion is used to connect with electronic product components; the negative pole extension portion, the negative pole demagnetization portion, the negative pole interface portion, the positive pole demagnetization portion and the positive pole interface portion are all insulated from the positive pole cylinder.

2. The button battery with degaussing function according to claim 1, characterized in that: Along the axial direction of the battery body, both sides of the positive electrode welding portion protrude from the positive electrode demagnetization portion, and both sides of the negative electrode welding portion protrude from the negative electrode demagnetization portion.

3. The button battery with degaussing function according to claim 1, characterized in that: The positive pole demagnetizing portion and the negative pole demagnetizing portion are located at the same axial position of the positive pole cylinder.

4. The button battery with degaussing function according to claim 3, characterized in that: The negative electrode welding portion is located in the axial middle position of the positive electrode barrel.

5. The button battery with degaussing function according to claim 1, characterized in that: The positive electrode interface portion is perpendicular to the positive electrode tube and extends in a direction away from the positive electrode tube; the negative electrode interface portion is perpendicular to the positive electrode tube and extends in a direction away from the positive electrode tube.

6. The button battery with degaussing function according to claim 5, characterized in that: The negative pole extension portion, the negative pole demagnetization portion and the positive pole demagnetization portion are all bonded to the positive pole barrel via an insulating adhesive layer.

7. The button battery with degaussing function according to claim 6, characterized in that: The thickness of the insulating rubber layer is 0.04mm-0.1mm.

8. The button battery with degaussing function according to claim 1, characterized in that: The negative electrode welding portion is located at the edge of the negative terminal sheet, and the two are in contact with each other. The negative electrode extension portion is arranged along the axial direction of the battery body.

9. The button battery with degaussing function according to claim 1, characterized in that: The negative pole demagnetizing portion and the positive pole demagnetizing portion have the same length.

10. The button battery with degaussing function according to claim 1, characterized in that: The positive electrode welding portion is laser welded to the positive electrode barrel, and the negative electrode welding portion is laser welded to the negative terminal piece.

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