CN215911479U

CN215911479U - Button cell

Info

Publication number: CN215911479U
Application number: CN202122056816.4U
Authority: CN
Inventors: 陈志勇
Original assignee: Guangdong Mic Power New Energy Co Ltd
Current assignee: Guangdong Mic Power New Energy Co Ltd
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2022-02-25
Anticipated expiration: 2031-08-27

Abstract

The application relates to a button cell. The button battery comprises a shell, a battery cell and a conducting strip; the shell is provided with a first end face and a second end face, the first end face and the second end face are insulated from each other, and a first leading-out end is connected to the first end face; the battery cell is arranged in the shell and comprises a first pole piece, a diaphragm and a second pole piece, the diaphragm is arranged between the first pole piece and the second pole piece, and the length of the first pole piece is shorter than that of the second pole piece; the first pole piece is connected with the first end face, and the second pole piece is connected with the second end face; the conducting strip is arranged on the first end face in an insulating mode and is connected with the first leading-out end; under the condition that the battery core is electrified, the electromagnetic field generated by the conducting strip is opposite to the direction of the electromagnetic field generated by the battery core. The technical effect of the application is that the interference of an electromagnetic field generated by the button cell in the power-on process to the electronic equipment is weakened.

Description

Button cell

Technical Field

The application relates to the technical field of batteries, in particular to a button battery.

Background

Button cells, also known as button cells, are generally larger in diameter and thinner in size, and are similar to a small button. Button cells are widely used in various miniature electronic products due to their small size.

In the prior art, a battery cell of a button battery is generally formed by stacking and winding a positive plate, a diaphragm and a negative plate, and the length of the positive plate and the length of the negative plate are inconsistent due to the difference of the winding mode, the material cost and the like. Under the condition that the battery core is electrified, the positive plate and the negative plate can generate electromagnetic fields in opposite directions, and the electromagnetic field intensity between the positive plate and the negative plate is different due to the length difference between the positive plate and the negative plate, so that the whole battery core also has a weak electromagnetic field outwards. Such weak electromagnetic fields may cause interference with electronic products when the button cell is applied to the electronic products. For example, in headphones, the electromagnetic field can cause the noise of the headphone to increase, reducing its acoustic quality.

SUMMERY OF THE UTILITY MODEL

It is an object of the present application to provide a button cell that solves at least one of the technical problems of the background art.

According to one aspect of the present application, there is provided a button cell comprising:

the shell is provided with a first end face and a second end face, the first end face and the second end face are mutually insulated, and a first leading-out end is connected to the first end face;

the battery cell is arranged in the shell and comprises a first pole piece, a diaphragm and a second pole piece, the diaphragm is arranged between the first pole piece and the second pole piece, and the length of the first pole piece is shorter than that of the second pole piece; the first pole piece is connected with the first end face, and the second pole piece is connected with the second end face;

the conducting strip is arranged on the first end face in an insulating mode and is connected with the first leading-out end; under the condition that the battery core is electrified, the electromagnetic field generated by the conducting strip is opposite to the direction of the electromagnetic field generated by the battery core.

Optionally, a first shielding layer is attached to the first end face, a second shielding layer is attached to the second end face, and the first shielding layer and the second shielding layer are made of magnetic isolation materials.

Optionally, the first terminal is exposed out of the first shielding layer; the conductive sheet is disposed on the first shield layer such that the conductive sheet is insulated from the first end surface.

Optionally, a second terminal is connected to the second end surface, and the second terminal is exposed out of the second shielding layer.

Optionally, the conductive sheet has a connection end thereon, and the connection end is used for connecting with the first leading-out end.

Optionally, the housing further has a side surface located between the first end surface and the second end surface, and the connecting end extends from the position of the first end surface to the side surface.

Optionally, a third shielding layer is disposed on the side surface at least at the connecting end.

Optionally, the conductive sheet and the first leading-out terminal are connected through a flexible circuit board.

Optionally, the conductive sheet is rectangular, and a length of one side of the rectangle is equal to a difference in length between the first pole piece and the second pole piece.

Optionally, the conductive sheet is made of at least one of copper, aluminum and nickel.

The technical effect of the application lies in that, through connect the conducting strip on the first electrode for under the circumstances of electric core circular telegram, the electromagnetic field that the conducting strip produced is opposite with the electromagnetic field that electric core produced, thereby can offset the electromagnetic field that electric core produced, has weakened the interference of the electromagnetic field that button cell produced to electronic equipment in the circular telegram in-process.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic structural diagram of a button cell in the present application.

Fig. 2 is a schematic diagram of the structure of fig. 1 after being turned over.

Fig. 3 is an exploded structure diagram of the button cell in the application.

Description of reference numerals:

1-a first end face; 2-a second end face; 3-a first leading-out terminal; 4-a second leading-out terminal; 5, conducting strips; 6-a first shielding layer; 7-a second shielding layer; 8-side face; 9-a third shielding layer; 10-a connecting end.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.

Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the prior art, the electric core of the button battery is generally formed by stacking and winding a positive plate, a negative plate and a diaphragm clamped between the positive plate and the negative plate, and the winding structure generally causes the lengths of the positive plate and the negative plate to be unequal. In addition, in the lithium ion battery, since the material of the positive electrode plate is expensive, in order to make the material of the positive electrode plate obtain the most efficient application, the material usage amount of the negative electrode plate is usually more than that of the positive electrode plate, which also causes the lengths of the positive electrode plate and the negative electrode plate to be unequal. In the above description, the unequal lengths of the positive and negative plates may cause that the electromagnetic field generated by the positive plate is weaker than the electromagnetic field generated by the negative plate in the process of electrifying the battery core, so that the battery core integrally generates an electromagnetic field to the outside, and when the button battery is applied to some electronic products, the electromagnetic field may generate electromagnetic interference to the button battery, thereby reducing the performance of the electronic products.

A button cell according to an embodiment of the present application is described below with reference to fig. 1 to 3.

The application provides a button battery, which comprises a shell, a battery cell and a conducting strip 5; the shell is provided with a first end face 1 and a second end face 2, the first end face 1 and the second end face 2 are mutually insulated, and a first leading-out terminal 3 is connected to the first end face 1; the battery cell is arranged in the shell and comprises a first pole piece, a diaphragm and a second pole piece, the diaphragm is arranged between the first pole piece and the second pole piece, and the length of the first pole piece is shorter than that of the second pole piece; the first pole piece is connected with the first end face 1, and the second pole piece is connected with the second end face 2; the conducting strip 5 is arranged on the first end surface 1 in an insulating way and is connected with the first leading-out end 3; when the battery core is powered on, the electromagnetic field generated by the conducting strip 5 is opposite to the electromagnetic field generated by the battery core.

Specifically, referring to fig. 1 to 3, in the present embodiment, the battery cell is prepared by using a first pole piece, a diaphragm and a second pole piece, and the battery cell may be arranged in a stacked manner or in a winding manner. The first pole piece and the second pole piece are respectively connected with the first end face 1 and the second end face 2 of the shell, so that the first pole piece and the second pole piece are led out of the shell, and the button cell is convenient to install and use. The first electrode sheet may be a positive electrode or a negative electrode of the battery, which is not limited in this application. In the application, the length of the first pole piece is shorter than that of the second pole piece, and when the electric core is electrified, the electromagnetic field generated by the first pole piece and the electromagnetic field generated by the second pole piece are opposite in direction and weak in strength and cannot be counteracted with each other, and then the electric core can generate an electromagnetic field outwards. The conducting strip 5 connected to the first pole piece can generate an electromagnetic field with the same direction as the first pole piece, so as to cancel a part of the electromagnetic field generated by the second pole piece, i.e. cancel a part of the electromagnetic field outside the core. The conductive sheet 5 may be made of a conductive material.

When the button cell is used in an electronic product, the conductive sheet 5 offsets the electromagnetic field of a part of electric core, so that the external electromagnetic field of the whole cell is reduced, the electromagnetic interference of the electromagnetic field on the electronic product is reduced in the use process of the cell, and the use effect of the electronic product is improved.

Optionally, referring to fig. 1 to 3, a first shielding layer 6 is attached to the first end surface 1, a second shielding layer 7 is attached to the second end surface 2, and the first shielding layer 6 and the second shielding layer 7 are made of a magnetic isolation material.

Specifically, in the present application, the first end face 1 and the second end face 2 of the battery are respectively connected to the first pole piece and the second pole piece, so that the first end face 1 can be used as one electrode of the battery, such as a positive electrode, and the second end face 2 can be used as the other electrode of the battery, such as a negative electrode. The first shielding layer 6 is attached to the first end face 1, the second shielding layer 7 is attached to the second end face 2, the magnetic isolation materials adopted by the first shielding layer 6 and the second shielding layer 7 have a good shielding effect on an electromagnetic field, the electromagnetic field generated by the whole battery can be further shielded, and the interference on external electronic products is further reduced.

Optionally, the first terminal 3 is exposed out of the first shielding layer 6; the conductive sheet 5 is disposed on the first shield layer 6 such that the conductive sheet 5 is insulated from the first end face 1.

Optionally, the conducting strip 5 is disposed on the first shielding layer 6, so that on one hand, the overall design space of the battery can be saved, and on the other hand, the first end surface 1 serves as a supporting surface, so that the conducting strip 5 is not easy to fall off from the first leading-out terminal 3, and the connection reliability is improved. In addition, the first leading-out terminal 3 is exposed out of the first shielding layer 6, so that the connection between the conducting strip 5 and the first leading-out terminal 3 is facilitated, and meanwhile, the first leading-out terminal 3 is also convenient to be communicated with an external structure.

Optionally, a second terminal 4 is connected to the second end surface 2, and the second terminal 4 is exposed out of the second shielding layer 7.

Specifically, the second end face 2 is further connected with a second leading-out terminal 4, and the second leading-out terminal 4 is exposed out of the second shielding layer 7, so that the second pole piece can be conveniently communicated with an external structure on the basis of shielding an electromagnetic field.

Optionally, the conducting strip 5 has a connecting terminal 10 thereon, and the connecting terminal 10 is used for connecting with the first leading-out terminal 3.

Specifically, referring to fig. 3, since the volume of the button cell is generally small, the connection between the conductive sheet 5 and the first leading-out terminal 3 is easily restricted by the structure to cause inconvenient connection, and the connecting terminal 10 is disposed on the conductive sheet 5, and the connecting terminal 10 can extend according to the external structure of the button cell casing to facilitate connection. The conductive sheet 5 may be directly connected to the first terminal 3, or may be connected to the first terminal through another conductive device, which is not limited in this application.

Optionally, the housing further has a side surface 8, the side surface 8 is located between the first end surface 1 and the second end surface 2, and the connecting end 10 extends from the position of the first end surface 1 to the side surface 8.

Specifically, in the present embodiment, due to the limitation of the outer shell structure of the button cell, the first leading-out terminal 3 is usually configured to protrude from the side surface 8 of the shell to facilitate connection to an external electronic product, and the connecting end 10 of the conductive sheet 5 extends from the position of the first end surface 1 to the side surface 8, so that the conductive sheet 5 can be more conveniently connected to the first leading-out terminal 3. As shown in fig. 1, the connection terminal 10 extends from the first shielding layer 6 on the first end surface 1 in an "S" shape to a position where it meets the side surface 8, and then extends from the position in an "L" shape to a position near the first leading-out terminal 3 from the side surface 8, so that on one hand, the connection is facilitated, and on the other hand, the conductive sheet 5 can be more tightly buckled on the battery, thereby avoiding the problems of collision, falling, etc. The specific extension and shape of the connecting end 3 can be freely selected according to specific conditions, and the application does not limit the invention.

Optionally, a third shielding layer 9 is disposed on the side surface 8 at least at the position of the connection end 10.

Specifically, referring to fig. 2 to 3, in this embodiment, in order to facilitate connection between the button battery and an external electronic product, a portion of the housing is usually directly connected to the electrode, and a position where the conductive sheet 5 is connected to the electrode affects a power-on range of the conductive sheet 5, and further affects strength of an electromagnetic field generated by the conductive sheet 5, and after the shape of the conductive sheet 5 is designed, a specific position of the conductive sheet is connected to the first lead-out terminal 3, so that the electromagnetic field generated by the battery cell can be more greatly cancelled. Therefore, the third shielding layer 9 is provided on the side surface 8, so as to insulate the non-connection portion of the connection terminal 10, and to shield the electromagnetic field generated in the direction of the side surface 8 of the battery. As shown in fig. 3, when the connection end of the conductive sheet 5 extends from the first shielding layer 6 to the side surface 8, the third shielding layer 9 may be provided as two pieces, one piece of the third shielding layer covers the junction between the first end surface 1 and the side surface 8, and the other piece of the third shielding layer may directly cover the side surface 8 where the connection end 10 extends, so that the bending region and the extending region of the connection end 10 may be insulated. The covering position of the third shielding layer may be designed according to the extending path of the connection end, which is not limited in this application.

Optionally, the conducting strip 5 and the first leading-out terminal 3 are connected through a flexible circuit board.

Specifically, the flexible circuit board is a circuit board capable of being bent at will, which can facilitate the connection of the conducting strip 5 and the first leading-out terminal 3 on one hand, and can facilitate the connection of the battery and an external circuit on the other hand. Not only saves the design space, but also can save the connecting devices and reduce the manufacturing cost.

Optionally, the conductive sheet 5 is rectangular, and a length of one side of the rectangle is equal to a difference between lengths of the first pole piece and the second pole piece.

Specifically, as shown in fig. 1 and fig. 3, the conducting strip 5 may be configured as a rectangle, wherein the length of one side of the rectangle is equal to the length difference between the first pole piece and the second pole piece, so that after the conducting strip 5 is connected to the first leading-out terminal 3, the intensity of the electromagnetic field generated by the rectangular conducting strip 5 is exactly equal to the intensity difference between the electromagnetic fields generated by the first pole piece and the second pole piece, the electromagnetic field generated by the battery cell is cancelled to the greatest extent, and the effect of the conducting strip 5 in cancelling the electromagnetic field is better. In addition, the rectangular conducting strip 5 is easy to manufacture, saves materials, improves the manufacturing efficiency and reduces the manufacturing cost.

Optionally, the material of the conductive sheet 5 is made of at least one of copper, aluminum and nickel.

Specifically, the conductive plate 5 may be made of a conductive metal material. Copper, aluminum and nickel all have good conductivity and stable chemical properties for conducting strip 5 can produce the electromagnetic field steadily for a long time, improves conducting strip 5's life and the effect that the electromagnetism was offset.

In the above embodiments, the differences between the embodiments are described in emphasis, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in consideration of brevity of the text.

Although some specific embodiments of the present application have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for purposes of illustration and is not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.

Claims

1. A button cell, comprising:

2. The button cell as claimed in claim 1, wherein a first shielding layer is attached to the first end face, a second shielding layer is attached to the second end face, and the first shielding layer and the second shielding layer are made of magnetic isolation materials.

3. The button cell according to claim 2, wherein the first lead-out terminal is exposed out of the first shielding layer; the conductive sheet is disposed on the first shield layer such that the conductive sheet is insulated from the first end surface.

4. The button cell according to claim 2, wherein a second terminal is connected to the second end surface, and the second terminal is exposed to the second shielding layer.

5. The button cell as recited in claim 1, wherein the conductive sheet has a connection end thereon for connection with the first terminal.

6. The button cell as defined in claim 5, wherein the housing further has a side surface located between the first end surface and the second end surface, the connecting end extending from the location of the first end surface to the side surface.

7. A button cell according to claim 6, wherein a third shielding layer is provided on the lateral surface at least at the connection end.

8. The button cell according to claim 1, wherein the conductive tab is connected to the first terminal via a flexible circuit board.

9. The button cell according to claim 1, wherein the conductive sheet is rectangular, and the length of one side of the rectangle is equal to the difference between the lengths of the first pole piece and the second pole piece.

10. The button cell as claimed in claim 1, wherein the conductive sheet is made of at least one of copper, aluminum and nickel.