CN217562772U - Button cell and electronic equipment - Google Patents

Abstract

The application relates to a button battery and an electronic device. The button battery comprises a battery cell, a first shell and a second shell; the first shell and the second shell are buckled with each other to form a sealed cylindrical shell, and the first shell and the second shell are insulated from each other; the battery cell is accommodated in the shell and provided with a first end face and a second end face, the first end face is opposite to the bottom wall of the first shell, and the second end face is opposite to the bottom wall of the second shell; the battery core is provided with a first tab and a second tab which are mutually insulated and led out from the first end face, the first tab is electrically connected with the bottom wall of the first shell, and the second tab is electrically connected with the side wall of the second shell. The application of the button cell in the height direction is improved, and the capacity of the cell is improved.

Description

Button cell and electronic equipment

Technical Field

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

Background

Button cells are also called button cells, which are cells with the overall dimension like a small button, generally speaking, the diameter is larger, the thickness is thinner, the button cells are also classified from the aspect of the appearance, and the same corresponding cells are classified into columnar cells, square cells and heteroid cells.

Button cells are increasingly used, especially in small mobile terminals such as headsets. The electric core in the button battery is electrically connected with the two shells through the two tabs, the two shells are buckled and sealed to obtain the button battery, and the shells are finally used as the positive pole and the negative pole of the button battery to conduct electricity. In the prior art, two tabs of the battery cell are usually led out from two ends of the battery cell, are flatly placed on two end faces, and are electrically connected with the shell, so that the thickness of at least two layers of tabs is increased in the height direction of the battery, the application of the battery in the height direction is limited, and the capacity of the battery is limited.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide a button battery and an electronic device.

According to a first aspect of the application, a button cell is provided, comprising:

the battery comprises a battery cell, a first shell and a second shell;

the first shell and the second shell are buckled with each other to form a sealed cylindrical shell, and the first shell and the second shell are insulated from each other;

the battery cell is accommodated in the shell, and the battery cell is provided with a first end face and a second end face, wherein the first end face is opposite to the bottom wall of the first shell, and the second end face is opposite to the bottom wall of the second shell;

the battery cell is provided with a first tab and a second tab which are mutually insulated from each other and led out from the first end face, the first tab is electrically connected with the bottom wall of the first shell, and the second tab is electrically connected with the side wall of the second shell.

Optionally, an insulating adhesive paper is disposed between the bottom wall of the first housing and the second tab, so that the second tab and the first housing are insulated from each other.

Optionally, the first tab is welded to a bottom wall of the first housing, and the second tab is welded to a side wall of the second housing.

Optionally, a step structure is formed on the side wall of the second casing, so that an accommodating space is formed between a portion of the side wall of the second casing, which is close to the first end face, and the battery cell, and the welding portion of the second tab and the side wall of the second casing is located at the accommodating space.

Optionally, a connection region protruding toward the first end surface is disposed on the bottom wall of the first housing, and the first tab is welded to the bottom wall of the first housing through the connection region.

Optionally, the first shell and the second shell are both cylindrical structures with one open end;

the first shell and the second shell are sleeved together through an open end, a first sleeving connection area is formed on the side wall of the first shell, a second sleeving connection area is formed on the side wall of the second shell, and the first sleeving connection area is sleeved on the outer side of the second sleeving connection area.

Optionally, an insulating rubber ring is arranged between the first sleeving connection area and the second sleeving connection area so as to insulate the first shell and the second shell from each other.

Optionally, the second registration area extends in an axial direction of the housing to a position close to the first end face, and the second tab extends along the first end face toward an opposite side of the lead-out position thereof and is connected to the second registration area.

Optionally, the shape of the second tab is a circular arc shape matched with the shape of the side wall of the second housing.

According to a second aspect of the present application, there is provided an electronic device comprising: the button cell of the first aspect.

One technical effect of the application lies in: the button battery provided by the application leads the first tab and the second tab out of the same end surface of the battery cell, namely the first end surface, and directly connects the first tab to the bottom wall of the first end surface, the second pole lug is led out from the first end face and connected to the side wall of the second shell, so that the finally obtained button battery only has the height of one pole lug in the height direction, the application of the battery in the height direction is improved, and the capacity of the battery is improved.

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 an appearance structure schematic diagram of a button cell provided by the present application.

Fig. 2 is a top view of fig. 1.

Fig. 3 isbase:Sub>A sectional view taken along the planebase:Sub>A-base:Sub>A of fig. 2.

Fig. 4 is a sectional view taken along the plane B-B of fig. 2.

Fig. 5 is a schematic view of a second tab provided by the present application welded to a side wall of a second housing.

Fig. 6 is a schematic structural view of the second tab in fig. 5 after the second tab is assembled with the second housing.

Fig. 7 is a bottom view of fig. 1.

In the figure: 1. an electric core; 11. a first end face; 12. a second end face; 13. a first tab; 14. a second tab; 2. a first housing; 21. a bottom wall of the first housing; 22. a first registration area; 23. a connecting region; 3. a second housing; 31. a side wall of the second housing; 32. a second registration area; 33. an accommodating space; 4. insulating gummed paper; 5. and an insulating rubber ring.

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, it need not be discussed further in subsequent figures.

As shown in fig. 1 to 5, according to a first aspect of the present application, there is provided a button cell including: the battery cell comprises a battery cell 1, a first shell 2 and a second shell 3; the first shell 2 and the second shell 3 are buckled with each other to form a sealed cylindrical shell, and the first shell 2 and the second shell 3 are insulated from each other; the battery cell 1 is accommodated in the housing, the battery cell 1 has a first end surface 11 and a second end surface 12, the first end surface 11 is opposite to the bottom wall 21 of the first casing, and the second end surface 12 is opposite to the bottom wall of the second casing 3; the battery cell 1 is provided with a first tab 13 and a second tab 14 which are insulated from each other and led out from the first end surface 11, the first tab 13 is electrically connected with the bottom wall 21 of the first casing, and the second tab 14 is electrically connected with the side wall 31 of the second casing.

In particular, button cells are widely used in various small electronic devices, such as earphones, watches, and the like, which are small in size and thus have a large influence on battery capacity in terms of size in height. In this embodiment, the housing of the button cell is formed by fastening the first casing 2 and the second casing 3 to form a cylindrical structure, the bottom wall 21 of the first casing and the bottom wall of the second casing 3 are two ends of the button cell respectively, and the distance between the two ends is the height (or thickness) of the button cell.

Referring to fig. 3, the first tab 13 and the second tab 14 of the battery cell 1 are led out from the same end surface (the first end surface 11) of the battery cell 1, the first tab 13 is directly attached to and electrically connected to the bottom wall 21 of the first casing, and the second tab 14 is extended to the side wall 31 of the second casing along the first end surface 11 and is electrically connected to the side wall 31 of the second casing. Therefore, the size of the whole button battery in the height direction only comprises the thickness of one battery cell 1, the thickness of one tab (the first tab 13 or the second tab 14), the thickness of the bottom wall 21 of the first shell and the thickness of the bottom wall of the second shell 3, and compared with the prior art, the thickness of one tab is at least reduced, the application and the adaptation degree of the button battery in the height direction are improved, and meanwhile, the battery capacity of the button battery is improved.

In this embodiment, the first tab 13 and the second tab 14 are respectively a positive tab or a negative tab of the battery cell 1, and after the first tab and the second tab are respectively electrically connected to the first casing 2 or the second casing 3, the first casing 2 and the second casing 3 of the button battery can be used as a positive terminal and a negative terminal thereof for charging. In addition, in the embodiment, the first case 2 and the second case 3 are insulated, the first tab 13 and the second tab 14 are also insulated, in practical application, insulating materials may be disposed at positions where the first case 2 and the second case 3 may contact, at positions where the first tab 13 and the second case 3 may contact, and at positions where the second tab 14 and the first case 2 may contact, or insulation may be achieved by means of insulating gas, etc., so as to avoid short circuit between the positive electrode and the negative electrode of the button cell, and improve safety performance of the button cell. The specific setting mode is not limited in this application.

Optionally, referring to fig. 3, an insulating adhesive tape 4 is disposed between the bottom wall 21 of the first casing and the second tab 14, so that the second tab 14 and the first casing 2 are insulated from each other.

Specifically, in the present embodiment, the insulating adhesive tape 4 is disposed between the bottom wall 21 of the first casing and the second tab 14, so that the second tab 14 and the first casing 2 are insulated from each other, and the short circuit between the positive electrode and the negative electrode of the button battery is avoided. Wherein, the insulating gummed paper 4 can paste and establish on the diapire 21 of first casing, also can paste on second utmost point ear 14, and this application does not do the restriction to this. In addition, the position of the insulating gummed paper 4 can be set only on the extending path of the second tab 14 on the bottom wall 21 of the first shell, and can also be set to be a larger area range, and specifically can be arranged according to the internal structure of the button battery, which is not limited in the present application.

Alternatively, referring to fig. 3 and 4, the first tab 13 is welded to the bottom wall 21 of the first housing, and the second tab 14 is welded to the side wall 31 of the second housing.

Specifically, the first housing 2 and the second housing 3 are generally configured as steel shells, and the first tab 13 and the second tab 14 are connected to the bottom wall 21 of the first housing and the side wall 31 of the second housing respectively by welding, so as to achieve the purpose of electrical connection. Welding can make its connection more firm on the one hand, improves the security performance of battery, and on the other hand, welding is as a ripe technology, and easy operation is applicable to batch production.

Optionally, as shown in fig. 4, a step structure is formed on the side wall 31 of the second casing, so that an accommodating space 33 is formed between a portion of the side wall 31 of the second casing, which is close to the first end surface 11, and the battery cell 1, and a connection portion of the second tab 14 and the side wall 31 of the second casing is located at the accommodating space 33.

Specifically, the first casing 2 and the second casing 3 are snap-fitted together, and in order to improve the mounting stability of the battery during the welding mounting, the side wall of the first casing 2 away from the bottom wall 21 of the first casing may be fitted by crimping in the direction of the side wall 31 of the second casing. Accordingly, in order to adapt to the crimping operation, the side wall 31 of the second casing may be provided with a step structure, the step structure enables the side wall 31 of the second casing to form two parts, the part close to the bottom wall of the second casing 3 (i.e. the part close to the second end face 12 of the battery cell 1) is provided as a first part, the part far from the bottom wall of the second casing 3 (i.e. the part close to the first end face 11 of the battery cell 1) is provided as a second part, wherein the diameter of the second part is larger than that of the first part, so that a certain distance is provided between the second part and the battery cell 1, the distance can form a containing space 33, the containing space 33 can contain a connecting part for placing the second tab 14 and the side wall 31 of the second casing, namely, the second tab 14 can be welded at the second part on the side wall 31 of the second casing, and the structure enables the welding position selected by the second tab 14 to be more ingenious and not to influence the capacity of the battery cell 1.

Alternatively, referring to fig. 3 and 7, a connecting region 23 protruding toward the first end surface 11 is provided on the bottom wall 21 of the first housing, and the first tab 13 is welded to the bottom wall 21 of the first housing through the connecting region 23.

Specifically, in the button cell provided by the present embodiment, the connecting region 23 protruding toward the first end surface 11 is disposed on the bottom wall 21 of the first case, so that during the assembly process, the protruding connecting region 23 can better contact with the first tab 13, and the occurrence of cold joint when welding the first tab 13 and the first tab 13 together is prevented, which leads to a decrease in reliability of the electrical connection between the first tab 13 and the bottom wall 21 of the first case. The shape of the connection region 23 may be circular, square, or elongated, and is specifically selected according to the shape of the first tab 13, which is not limited in the present application.

Alternatively, referring to fig. 1, 3, 4, the first housing 2 and the second housing 3 are both cylindrical structures with one open end; the first housing 2 and the second housing 3 are sleeved together through an open end, a first sleeving area 22 is formed on the side wall of the first housing 2, a second sleeving area 32 is formed on the side wall 31 of the second housing, and the first sleeving area 22 is sleeved outside the second sleeving area 32.

Specifically, in the present embodiment, the first housing 2 and the second housing 3 are both cylindrical structures, and the first housing 2 and the second housing 3 are sleeved together through the open end, and the first sleeving connection region 22 and the second sleeving connection region 32 are sleeved, that is, a cylindrical outer shell with two closed ends is formed. The housing structure makes the sealing of the button cell easier to achieve, wherein the first attachment region 22 is attached to the outer side of the second attachment region 32, and an insulating material or a sealing material may be disposed between the first attachment region 22 and the second attachment region 32 to achieve the insulation and the sealing of the housing between the first casing 2 and the second casing 3. The second tab 14 may be connected to the second nesting area 32, or may be connected to other portions of the side wall 31 of the second casing, which is not limited in this application.

Optionally, referring to fig. 3, an insulating rubber ring 5 is disposed between the first registration area 22 and the second registration area 32 to insulate the first housing 2 and the second housing 3 from each other.

In particular, in the present embodiment, the insulating rubber rings 5 are provided at the first mating region 22 and the second mating region 32, and the sealing rubber rings can achieve the insulating requirement between the first casing 2 and the second casing 3 on one hand, and can simultaneously seal the housing of the button cell on the other hand.

Alternatively, referring to fig. 3 or 6, the second registration area 32 extends along the axial direction of the housing to a position close to the first end surface 11, and the second tab 14 extends along the first end surface 11 toward the opposite side of the lead-out position thereof and is connected to the second registration area.

Specifically, in the present embodiment, the second tab 14 extends to the second nesting area 32 along the leading-out position of the first end surface 11, and is connected to the second nesting area 32, so as to implement the electrical connection between the second tab 14 and the second housing 3. The second nesting area 32 extends to a position close to the first end surface 11 along the axial direction of the housing, so that when the second tab 14 extends to the edge of the first end surface 11, the connection with the side edge of the second housing 3 can be realized, and the convenience of connection is improved. In addition, the longer the second tab 14 extends along the second nesting area 32 toward the second end surface 12, the larger the connection area between the second tab and the side wall 31 of the second case is, and the firmness of the connection between the second tab 14 and the second case 3 is improved, thereby improving the safety performance of the battery.

After being led out of the first end surface 11, the second tab 14 extends toward the side wall 31 of the second housing opposite to the led-out position, and is connected to the second registration area 32 after reaching the side wall 31 of the second housing. This extension of the second tab 14 makes it possible, during assembly, to weld the second tab directly to the second sheathing region 32 before the cell 1 is assembled inside the second casing 3 in an inverted manner, see fig. 5 to 6. Due to the adoption of the assembly mode, the electric core 1 can be prevented from being influenced by the welding of the second tab 14 and the second sleeving connection region 32 in the assembly process, and the assembly efficiency and the assembly quality of the button cell are improved.

Optionally, the shape of the second tab 14 is a circular arc shape matching the shape of the side wall 31 of the second casing.

Specifically, in this embodiment, when the second tab 14 is connected to the side wall 31 of the second housing, the shape of the second tab is set to be arc-shaped matching with the shape of the side wall 31 of the second housing, so that the second tab 14 can be better attached to the side wall, and the processes such as welding are performed more conveniently, the connection firmness is stronger, and the safety performance of the battery is improved.

According to a second aspect of the present application, there is provided an electronic device comprising: the button cell of any one of the above embodiments.

In this embodiment, the button cell may be applied to small electronic devices such as earphones and watches, and may also be applied to some large precision instruments, which is not limited in this application. By adopting the button battery provided by the application, the first tab 13 and the second tab 14 are both led out of the first end surface 11, so that the thickness of one tab is reduced in the height direction compared with the button battery in the prior art, and the button battery can be widely applied in the height direction.

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 (10)

1. A button cell, comprising:

the battery comprises a battery cell, a first shell and a second shell;

the first shell and the second shell are buckled with each other to form a sealed cylindrical shell, and the first shell and the second shell are insulated from each other;

the battery cell is accommodated in the shell and provided with a first end face and a second end face, the first end face is opposite to the bottom wall of the first shell, and the second end face is opposite to the bottom wall of the second shell;

the battery cell is provided with a first tab and a second tab which are mutually insulated from each other and led out from the first end face, the first tab is electrically connected with the bottom wall of the first shell, and the second tab is electrically connected with the side wall of the second shell.

2. The button cell as recited in claim 1, wherein an insulating adhesive paper is disposed between the bottom wall of the first casing and the second tab, so that the second tab and the first casing are insulated from each other.

3. The button cell according to claim 1, wherein the first tab is welded to the bottom wall of the first housing and the second tab is welded to the side wall of the second housing.

4. The button cell of claim 3, wherein a step structure is formed on the side wall of the second casing, so that a receiving space is formed between a portion of the side wall of the second casing, which is close to the first end face, and the cell, and the welding portion of the second tab and the side wall of the second casing is located at the receiving space.

5. The button cell according to claim 3, wherein a connecting region protruding toward the first end face is provided on the bottom wall of the first case, and the first tab is welded to the bottom wall of the first case through the connecting region.

6. Button cell according to claim 1,

the first shell and the second shell are both cylindrical structures with one open end;

the first shell and the second shell are sleeved together through an open end, a first sleeving connection area is formed on the side wall of the first shell, a second sleeving connection area is formed on the side wall of the second shell, and the first sleeving connection area is sleeved on the outer side of the second sleeving connection area.

7. The button cell of claim 6, wherein an insulating rubber ring is disposed between the first and second registration areas to insulate the first and second housings from each other.

8. The button cell as set forth in claim 6 wherein said second registration area extends axially of said housing to a location adjacent said first end surface, said second tab extending along said first end surface toward an opposite side of its exit location and being connected to said second registration area.

9. The button battery according to claim 1, wherein the second tab has a circular arc shape matching the shape of the side wall of the second case.

10. An electronic device, comprising: button cell according to any of claims 1 to 9.

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