CN114747082A

CN114747082A - Battery with a battery cell

Info

Publication number: CN114747082A
Application number: CN201980102644.2A
Authority: CN
Inventors: 韦天华; 黄小钊; 王华强; 李超鹏
Original assignee: Dongguan Nvt Technology Co Ltd
Current assignee: Dongguan Nvt Technology Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2022-07-12
Also published as: WO2021102976A1

Abstract

A battery comprises a battery body and an electric connection structure, wherein the battery body comprises a shell and a pole, the shell comprises a top wall, a bottom wall and a side wall for connecting the top wall and the bottom wall, the side wall comprises an arc surface area and a plane area connected with the arc surface area, the pole is arranged in the plane area in a penetrating mode, and the pole is insulated from the shell; the electric connection structure comprises a first input end, a first output end and a metal sheet electrically connected with the first input end and the first output end, the first input end is electrically connected with the pole, and the first output end is arranged along the plane where the top wall is located. The structure of the battery is advantageous for improving the stability of electrical connection and miniaturization of the battery.

Description

Battery with a battery cell

Technical Field

The present application relates to the field of batteries.

Background

With the increasing progress of electronic technology, portable electronic devices are increasingly available in the market, and for portability, the portable electronic devices are increasingly light and thin, and button batteries are used as power sources for the portable electronic devices. However, when the conventional button cell is electrically connected to an external electronic component/device, the reliability of the electrical connection is poor.

Disclosure of Invention

In view of the above, it is necessary to provide a battery which is higher in reliability and advantageous for miniaturization.

A battery, comprising:

the battery comprises a battery body and a pole, wherein the battery body comprises a shell and a pole, the shell comprises a top wall, a bottom wall and a side wall for connecting the top wall and the bottom wall, the side wall comprises an arc surface area and a plane area connected with the arc surface area, the pole is arranged in the plane area in a penetrating mode, and the pole is insulated from the shell;

the electric connection structure comprises a first input end, a first output end and a metal sheet electrically connected with the first input end and the first output end, the first input end is electrically connected with the pole column, and the first output end is arranged along the plane where the top wall is located.

In an embodiment of the present application, an insulating layer is disposed between the metal sheet and the housing.

In an embodiment of the present application, the first output terminal is an electron beam, and the electron beam extends from the side wall along the direction of the top wall.

In an embodiment of the present application, the first output terminal is a conductive sheet and is insulated from the housing.

In an embodiment of the present application, the electrical connection structure further includes a second input end and a second output end electrically connected to the second input end, and the second input end is electrically connected to the housing.

In an embodiment of the present application, the second output terminal is an electronic wire or a conductive sheet

In an embodiment of the present application, the second output end is disposed in parallel with the first output end.

In an embodiment of the present application, the first input end is made of conductive foam, so as to be bonded and electrically connected with the pole; and/or the second input end is conductive foam so as to be bonded and electrically connected with the shell.

In an embodiment of the present application, the battery further includes an encapsulation film encapsulating the battery main body and the electrical connection structure; wherein the first output terminal and the second output terminal are exposed from the encapsulation film.

In an embodiment of the present application, the package film is integrally formed with the battery main body and the electrical connection structure by injection molding.

In an embodiment of the present application, the battery further includes an encapsulation film encapsulating the battery main body and the electrical connection structure; wherein the first output terminal is exposed from the encapsulation film.

In one embodiment of the present application, the battery includes a plurality of battery bodies stacked and encapsulated by the encapsulation film, and the plurality of battery bodies are connected in series or in parallel.

The utility model provides a battery pack, because utmost point post set up in the plane district, the second input is located the plane district to be favorable to improving the validity that the second input electricity is connected, and then improve battery pack's reliability. In addition, through the sheetmetal is connected first input with first output is favorable to reducing the volume of battery, is favorable to the miniaturization of battery.

Drawings

Fig. 1 is an exploded view of a battery according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a battery main body according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a battery main body according to an embodiment of the present application.

Fig. 4 is a schematic cross-sectional view of a battery body according to an embodiment of the present application.

Fig. 5 is a schematic partial cross-sectional view of a battery body according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a battery according to an embodiment of the present application.

Fig. 7 is a schematic structural diagram of a battery according to an embodiment of the present application.

Fig. 8 is an exploded view of a battery according to an embodiment of the present application.

Fig. 9 is a schematic structural diagram of a battery according to an embodiment of the present application.

Fig. 10 is a schematic structural diagram of a battery according to an embodiment of the present application.

Fig. 11 is a schematic structural diagram of a battery according to an embodiment of the present application.

Fig. 12 is a schematic structural diagram of a battery according to an embodiment of the present application.

Description of the main elements

Battery pack	100
Battery body	10
Electric connection structure	30
Outer casing	11
Pole post	12
Roof wall	111
Bottom wall	113
Side wall	115
Arc zone	116
Plane area	117
A first pole part	121
Second pole part	125
First connecting post	121
First protruding part	122
Second connecting column	126
Second protruding part	127
Clamping groove	128
Mounting hole	118

Insulating member	15
Battery cell	17
Battery cell main body	171
First pole ear	173
Second pole ear	175
A first input terminal	31
A first output terminal	33
Metal sheet	35
Insulating layer	40
Packaging film	50
Opening of the container	51、53
Second input terminal	32
A second output terminal	34

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1, a battery 100 according to an embodiment of the present application includes a battery body 10 and an electrical connection structure 30. In the present application, the battery main body 10 is a button battery.

Referring to fig. 2, the battery body 10 includes a housing 11 and a terminal 12. The housing 10 is made of an electrically conductive material, such as a metal or an alloy. The housing 11 includes a top wall 111, a bottom wall 113, and a side wall 115 connecting the top wall 111 and the bottom wall 113. The sidewall 115 includes an arc-shaped area 116 and a planar area 117 connected to the arc-shaped area 116.

The pole 12 is made of an electrically conductive material, such as a metal or an alloy. The pole 12 is disposed on the planar area 117, and the pole 12 is insulated from the planar area 117. The pole 12 is arranged on the plane area 117, so that the problem of thickness increase of the battery caused by arranging the pole on the top of the battery is avoided, and the space utilization rate of the battery is improved.

Specifically, in the present application, the arcuate region 116 corresponds to a partially arcuate sidewall of a cylinder. Referring to fig. 3, except for the connection with the arc-shaped area 116, the distance D1 from the flat area 117 to the central axis of the cylinder is smaller than the distance D2 from the arc-shaped area 116 to the central axis of the cylinder. Preferably, in some embodiments, the ratio of D1 to D2 is 4:5 to 9:10, and the pole 12 is located in the corresponding circumscribed circle of the planar area 117, so as to further improve the utilization rate of the internal space of the electronic device. More preferably, referring to fig. 4 and 5, in some embodiments, the height H of the post 12 protruding from the center of the housing 11 is 0.3mm to 10mm compared to the planar area 117, so as to facilitate connection with other components while reducing the volume.

Referring to fig. 5, the pole post 12 includes a first pole portion 121 and a second pole portion 125. The first pole portion 121 is substantially T-shaped, and includes a first connecting pillar 122 and a first protrusion 123 extending outward from a periphery of one end of the first connecting pillar 122. The second pole part 125 is substantially T-shaped, and includes a second connection post 126 and a second protrusion 127 extending outward from the periphery of one end of the second connection post 126. The end of the second connecting post 126 away from the second protrusion 127 is provided with a locking groove 128. The first connecting column 122 is inserted into the slot 128 to form an i-shaped pole 12. The planar area 117 is provided with a through mounting hole 118, the first connecting post 122 is engaged with the second connecting post 126 and passes through the mounting hole 118, the first protruding portion 123 is located on the housing 11, and the second protruding portion 127 is located on the housing 11, so as to be limited at two sides of the mounting hole 118.

The battery body 10 further includes an insulating member 15, and the insulating member 15 is disposed between the case 11 and the post 12 to insulate the case 11 from the post 12. In some embodiments, the insulating member 15 may be a separate design from the housing 11 and the pole 12. In other embodiments, the insulating member 15 may be integrated with the housing 11 or the pole post 12, for example, by injection molding. The insulating member 15 may be, but not limited to, a polymer material, such as plastic or rubber, e.g., nylon, PFA (copolymer of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene), etc.

Referring to fig. 4, the battery main body 10 further includes a battery cell 17, and the battery cell 17 is packaged by the housing 11 and the electrode post 12 in a matching manner. The battery cell 17 may be a stacked battery cell or a winding battery cell. The battery cell 17 includes a cell main body 171, and a first tab 173 and a second tab 175 connected to the cell main body 171, respectively. The first tab 173 and the second tab 175 have opposite polarities. The first tab 173 electrically connects the cell body 171 and the case 11, and the second tab 175 electrically connects the cell body 171 and the pole 12. That is, in the battery main body 10, when the first tab 173 is a negative tab and the second tab 175 is a positive tab, the case 11 serves as a negative electrode, and the terminal is a positive electrode; when the first tab 173 is a positive tab and the second tab 175 is a negative tab, the housing 11 serves as a positive electrode, and the terminal is a negative electrode.

Referring to fig. 2, in some embodiments, the sidewall 115 includes an arc-shaped region 116 and a flat region 117. Referring to fig. 3, in some embodiments, the sidewall 115 includes two arc regions 116 and two plane regions 117, the arc regions 116 and the plane regions 117 are alternately disposed, and the two plane regions 117 are opposite to each other. In the present application, the planar region 117 is provided to improve energy density, and also to facilitate positioning of the battery 100 during installation, while facilitating stability of the terminal 12 arrangement.

Referring to fig. 1, 6 to 9, the electrical connection structure 30 includes a first input end 31, a first output end 33, and a metal sheet 35 connecting the first input end 31 and the first output end 33. The metal sheet 35 makes an electrical connection between the first input terminal 31 and the first output terminal 33. The first input terminal 31 is disposed in the planar region 117 and electrically connected to the pole post 12. The first output end 33 is disposed along the plane of the top wall 111. In the present application, since the terminal 12 is disposed in the planar area 117, the first input end 31 is located in the planar area 117, so as to facilitate the effectiveness of the electrical connection of the first input end 31, and thus improve the reliability of the battery 100. In addition, the metal sheet 35 connects the first input end 31 and the first output end 33, which is beneficial to reducing the volume of the battery and the miniaturization of the battery.

In some embodiments, the first input terminal 31, the first output terminal 33 and the metal sheet 35 may be respectively disposed at a distance from the housing 11, so as to prevent the first input terminal 31, the first output terminal 33 and the metal sheet 35 from contacting the housing 11 and thus from short-circuiting. In some embodiments, an insulating layer 40 may be further disposed between the first input terminal 31 and the housing 11, between the first output terminal 33 and the housing 11, and between the metal sheet 35 and the housing 11, respectively, to prevent the first input terminal 31, the first output terminal 33, and the metal sheet 35 from contacting the housing 11 and thus from short circuit.

Referring to fig. 6 to 10, the first output terminal 33 may be an electron beam or a conductive sheet.

Referring to fig. 1, the battery 100 may further include an encapsulation film 50, and the encapsulation film 50 encapsulates the battery body 10 and the electrical connection structure 30. Wherein the first output end 33 is exposed from the encapsulation film 50.

Specifically, in some embodiments, referring to fig. 1, 6, 7 and 10, the first output end 33 extends from the side wall 115 and the encapsulation film 50 along the direction of the top wall 111.

In other embodiments, referring to fig. 8 and 9, the first output end 33 is a conductive sheet, the conductive sheet is located on the top wall 111, an opening 51 is formed on the encapsulation film 50, and the first output end 33 is exposed from the opening 51, so as to be electrically connected to an external electronic component.

The electrical connection structure 30 further includes a second input terminal 32 and a second output terminal 34 electrically connected to the second input terminal 32. The second input terminal 32 is electrically connected to the housing 11 and is covered by the encapsulation film 50. The second output end 34 is exposed from the encapsulation film 50.

In some embodiments, referring to fig. 6, the second output end 34 is an electronic wire or a conductive sheet, and the second output end 34 extends from the encapsulation film 50 along the direction of the top wall 111. In some embodiments, referring to fig. 10, the second output end 34 may also extend from the encapsulation film 50 along the direction of the sidewall 115. In other embodiments, referring to fig. 8 and 9, the second output end 34 is a conductive sheet located on the top wall 111, the encapsulation film 50 is provided with an opening 53, and the second output end 34 is exposed from the opening 53 to be point-connected to an external electronic component.

Preferably, the first output end 33 and the second output end 34 are arranged in parallel.

The first input terminal 31 and the second input terminal 34 are conductive materials. In particular, in some embodiments, the first input terminal 31 is made of conductive foam to be bonded and electrically connected with the pole 12; the second input terminal 34 may be a conductive foam to bond with the housing 11 and electrically connect with the housing 11.

In some embodiments, the packaging film 50 can be, but is not limited to, a heat shrink film that shrinks against the battery body 10 and the electrical connection structure 30 upon heating.

In some embodiments, the encapsulation film 50 may be integrally formed with the battery main body 10 and the electrical connection structure 30 through injection molding, so that the encapsulation film 50 not only covers the battery main body 10 at the outer side of the electrical connection structure 30, but also fills a gap between the battery main body 10 and the electrical connection structure 30 (e.g., a gap between the metal sheet 35 and the housing 11), so as to improve the insulation effect and the drop resistance of the battery 100, thereby further ensuring the stability of electrical connection. As shown in fig. 11, a portion of the encapsulation film 50 is directly injected onto the top wall 111 and a portion of the side wall 115 of the battery body 10 to cover the electrical connection structure 30, such that only the first output end 33 and the second output end 34 are exposed outside the injection-molded encapsulation film 50. The battery 100 may further include a separable packaging film for covering a region of the battery body 10 that is not packaged by the injection-molded packaging film 50. As shown in fig. 12, the packaging film 50 is integrally formed on the entire battery body 10 by injection molding, and covers the electric connection structure 30 except for the first output end 33 and the second output end 34.

In other embodiments, the battery 100 omits the second input end 32, and directly electrically connects the exposed portion of the casing 11 from the encapsulation film 50 as the second output end 34 with an external electronic component.

In some embodiments, the battery 100 may include a plurality of battery bodies 10, and the plurality of battery bodies 10 are connected in series or in parallel.

In addition, it is obvious to those skilled in the art that other various corresponding changes and modifications can be made according to the technical idea of the present application, and all such changes and modifications should fall within the protective scope of the claims of the present application.

Claims

A battery, comprising:

the battery comprises a battery body and a pole, wherein the battery body comprises a shell and a pole, the shell comprises a top wall, a bottom wall and a side wall for connecting the top wall and the bottom wall, the side wall comprises an arc surface area and a plane area connected with the arc surface area, the pole is arranged in the plane area in a penetrating mode, and the pole is insulated from the shell;

the electric connection structure comprises a first input end, a first output end and a metal sheet electrically connected with the first input end and the first output end, the first input end is electrically connected with the pole column, and the first output end is arranged along the plane where the top wall is located.
The battery of claim 1, wherein an insulating layer is disposed between the metal sheet and the housing.
The battery of claim 1, wherein the first output is an electron beam that extends from the side wall in the direction of the top wall.
The battery of claim 1, wherein the first output terminal is a conductive sheet and is insulated from the housing.
The battery of claim 1, wherein the electrical connection structure further comprises a second input and a second output electrically connected to the second input, the second input electrically connected to the housing.
The battery of claim 5, wherein the second output is an electron line or a conductive sheet
The battery of claim 5, wherein the second output is disposed in parallel with the first output.
The battery of claim 5, wherein the first input end is conductive foam to bond and electrically connect with the post; and/or the second input end is conductive foam so as to be bonded and electrically connected with the shell.
The battery of claim 5, further comprising an encapsulation film encapsulating the battery body and the electrical connection structure; wherein the first output terminal and the second output terminal are exposed from the encapsulation film.
The battery of claim 1, further comprising an encapsulation film encapsulating the battery body and the electrical connection structure; wherein the first output terminal is exposed from the encapsulation film.
The battery of claim 10, wherein the encapsulation film is integrally formed with the battery body and the electrical connection structure by injection molding.
The battery according to any one of claims 9 to 11, wherein the battery comprises a plurality of battery bodies, the plurality of battery bodies are stacked and encapsulated by the encapsulation film, and the plurality of battery bodies are connected in series or in parallel.