CN113302776A

CN113302776A - Battery with a battery cell

Info

Publication number: CN113302776A
Application number: CN201980089150.5A
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: 2021-08-24
Also published as: WO2021102973A1

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 and a first output end electrically connected with the first input end, the first input end is electrically connected with the pole, the first output end is arranged along the plane where the side wall is located, and the first output end is insulated from the shell. The cell structure is beneficial to improving the energy density of the cell and the stability of electric connection.

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 desirable to provide a battery that can improve the energy density of the battery and has higher reliability.

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 and a first output end electrically connected with the first input end, the first input end is electrically connected with the pole, the first output end is arranged along the plane where the side wall is located, and the first output end is insulated from the shell.

In an embodiment of the present application, the electrical connection structure further includes a flexible circuit board, and the first input end is connected to the first output end through the flexible circuit board.

In an embodiment of the present application, the first output end is an electronic wire, the electronic wire is disposed along a plane where the side wall is located, one end of the electronic wire is connected to the flexible circuit board, and the other end of the electronic wire extends out of the top wall.

In an embodiment of the present application, the first output end is a pad, a gold finger, a conductive sheet, or a connector, and the first output end is disposed in an area of the flexible circuit board corresponding to the sidewall.

In an embodiment of the present application, the flexible circuit board includes a first portion and a second portion connected to the first portion, the first portion is mounted on the housing, the second portion is disposed along a plane where the side wall is located and extends out of the top wall, and the first output end is disposed in a region where the second portion extends out of the top wall.

In an embodiment of the present application, the electrical connection structure further includes a metal sheet, the first input end is connected to the first output end through the metal sheet, the metal sheet is disposed along a plane where the side wall is located and extends out of the top wall, the metal sheet is insulated from the housing, and the first output end is located in a region where the metal sheet extends out of the top wall.

In an embodiment of the present application, the first output terminal is any one of a pad, a conductive sheet, an electronic wire, and a connector.

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 electrical connection structure further includes a flexible circuit board or a metal sheet, and the second input terminal is connected to the second output terminal through the flexible circuit board or the metal sheet.

In an embodiment of the present application, the second output terminal is an electronic wire, a pad, a gold finger, a conductive sheet, or a connector.

In an embodiment of the present application, the first input end is made of conductive foam, so as to be bonded to the terminal and electrically connected to the terminal; 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 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 an embodiment of the present application, the encapsulation film is integrally formed with the battery main body and the flexible circuit board by injection molding.

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.

In this application, because utmost point post set up in the plane district has avoided utmost point post to occupy the space of battery tip to be favorable to the energy density of battery, and first input is located the plane district is favorable to improving the validity that first input electricity is connected, and then improves battery pack's reliability. In addition, the first output end is arranged along the direction of the side wall, so that the space of the end part of the battery is not occupied, and the energy density of the battery is further improved.

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 partially enlarged schematic view of the battery main body shown in fig. 4.

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 an exploded view 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 an exploded view 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.

Fig. 13 is an exploded view of a battery according to an embodiment of the present application.

Fig. 14 is a schematic structural diagram of a battery according to an embodiment of the present application.

Fig. 15 is an exploded view of a battery according to an embodiment of the present application.

Fig. 16 is a schematic structural diagram of a battery according to an embodiment of the present application.

Fig. 17 is an exploded view of a battery according to an embodiment of the present application.

Fig. 18 is a schematic structural diagram of a battery according to an embodiment of the present application.

Fig. 19 is an exploded view of a battery according to an embodiment of the present application.

Fig. 20 is a schematic structural diagram of a battery according to an embodiment of the present application.

Fig. 21 is an exploded view of a battery according to an embodiment of the present application.

Fig. 22 is a schematic structural diagram of a battery according to an embodiment of the present application.

Fig. 23 is an exploded view of a battery according to an embodiment of the present application.

Fig. 24 is a schematic structural diagram of a battery according to an embodiment of the present application.

Fig. 25 is an exploded view of a battery according to an embodiment of the present application.

Fig. 26 is a schematic structural diagram of a battery according to an embodiment of the present application.

Fig. 27 is an exploded view of a battery according to an embodiment of the present application.

Fig. 28 is an exploded view of a battery according to an embodiment of the present application.

Fig. 29 is a schematic structural diagram of a battery according to an embodiment of the present application.

Description of the main elements

Battery with a battery cell	100
Battery body	10
Electric connection structure	20
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	122
First protruding part	123
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	21
A first output terminal	23
Insulating layer	30
Second input terminal	25
Second output terminal	27
Packaging film	40
Flexible circuit board	29、29a
Opening of the container	41
The first part	291
The second part	293
Metal sheet	28a、28b

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 20. In the present application, the battery body 10 is a button battery.

Referring to fig. 2, the battery body 10 includes a housing 11 and a terminal 12. The housing 11 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. Wherein, the pole post 12 is arranged on the plane area 117, which avoids the problem of increasing the thickness of the battery caused by arranging the pole post on the top of the battery, thereby improving the space utilization rate of the battery.

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 post 122 is inserted into the engaging groove 128 to engage with the pole 12 in an i-shape. 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 core 17, and the battery core 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 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 27, the electrical connection structure 20 includes a first input end 21 and a first output end 23 electrically connected to the first input end 21. The first input end 21 is electrically connected with the pole 12, the first output end 23 is arranged along the direction of the side wall, and the first input end 21, the first output end 23 and the shell 11 are insulated. In the present application, because the terminal 12 is disposed in the plane area 117, the terminal is prevented from occupying the space of the battery end, thereby facilitating the energy density of the battery, and the first input end 21 is disposed in the plane area 117, which is beneficial to improving the effectiveness of the electrical connection of the first input end 21, and further improving the reliability of the battery 100. In addition, the first output end 23 is arranged along the direction of the side wall, so that the space of the end part of the battery is not occupied, and the energy density of the battery is further improved.

Specifically, the first input terminal 21 and the first output terminal 23 may be spaced apart from the housing 11, so as to avoid short circuit. In some embodiments, an insulating layer 30 may also be provided between the first input 21 and the housing 11 and between the first output 23 and the housing 11 to avoid short circuits.

The electrical connection structure 20 further includes a second input terminal 25 and a second output terminal 27 electrically connected to the second input terminal 25. The second input 25 is electrically connected to the housing 11.

The battery 100 may further include an encapsulation film 40, wherein the encapsulation film 40 encapsulates the electrical connection structure 20 and the battery body 10, and the first output terminal 23 and the second output terminal 27 are exposed from the encapsulation film 40.

In some embodiments, the packaging film 40 can be, but is not limited to, a heat shrink film, which shrinks tightly against the battery body 10 and the electrical connection structure 20 after being heated.

The electrical connection structure 20 may further include a flexible circuit board 29, and the first input terminal 21 is connected to the first output terminal 23 through the flexible circuit board 29. The encapsulation film 40 may encapsulate the flexible circuit board 29.

Referring to fig. 1 and 6, the sidewall 115 includes two arc-shaped areas 116 and two planar areas 117, and the two planar areas 117 are disposed substantially in parallel. The pole 12 is disposed on one of the planar regions 117. The flexible circuit board 29 is arranged along one of the arc areas 116, one end of the flexible circuit board 29 is connected with the pole 12, and the other end of the flexible circuit board is connected with the plane area 117 without the pole 12. The first output end 23 and the second output end 27 are electronic wires, and are connected to the flexible circuit board 29 in the region corresponding to the arc-shaped area 116, so as to electrically connect the first output end 23 and the first input end 21, and electrically connect the second output end 27 and the second input end 25. Each electronic wire is arranged along the direction of the side wall 115, and one end of the electronic wire facing away from the flexible circuit board 29 extends out of the top wall 111 and out of the packaging film 40.

In some embodiments, referring to fig. 7 and 8, the flexible circuit board 29 is connected to the post 12 to electrically connect the first output end 23 and the first input end 21, and the flexible circuit board 29 is connected to the top wall to electrically connect the second output end 27 and the second input end 25. The first output end 23 and the second output end 27 are electronic wires, and are arranged in parallel along the direction of the planar area 117 where the terminal 12 is located, and one end of each electronic wire departing from the flexible circuit board 29 extends out of the top wall 111 and extends out of the packaging film 40.

In some embodiments, referring to fig. 9, the flexible circuit board 29 is disposed corresponding to the planar area 117 where the terminal 12 is disposed, and the second input terminal 25 is connected to the planar area 117 where the terminal 12 is disposed. The first output end 23 and the second output end 27 are electron beams, and extend out of the top wall 111 along the planar area 117 where the electrode post 12 is disposed, and extend out of the encapsulation film 40.

In some embodiments, referring to fig. 12 to 19, the first output terminal 23 and the second output terminal 27 may also be one of a connector, a gold finger, a pad, or a conductive sheet. The first output end 23 and the second output end 27 are disposed in the region of the flexible circuit board 29 corresponding to the sidewall 115. The encapsulation film 40 is provided with an opening 41 to expose the first output end 23 and the second output end 27. Preferably, the first output end 23 and the second output end 27 are disposed corresponding to the planar area 117.

In some embodiments, referring to fig. 20 to 23, the flexible circuit board 29 includes a first portion 291 and a second portion 293 connected to the first portion 291. The first portion 291 is mounted on the housing 11 and is encapsulated by the encapsulating film 40, and the second portion 293 extends out of the top wall 111 along the plane of the side wall 115 and extends out of the encapsulating film 40.

The first output end 23 and the second output end 27 are disposed on a second portion 293 of the flexible circuit board 29 exposed outside the encapsulation film 40.

Preferably, the second portion 293 extends from the planar region 117 beyond the top wall 111.

In some embodiments, referring to fig. 24 to 27, the electrical connection structure 20 may connect the first output end 23 and the first input end 21 through a metal sheet 28a, and the metal sheet 28a is disposed along the planar area 117 and extends out of the top wall 111 so as to extend out of the encapsulation film 40. The metal sheet 28a is insulated from the housing 11. The first output end 23 is located in a region where the metal sheet 28a is exposed to the encapsulation film 40.

The second output terminal 27 and the second input terminal 25 may be connected by a metal plate 28b, and the second output terminal 27 is exposed from the encapsulation film 40.

In other embodiments, referring to fig. 10 and 11, the second output end 27 and the second input end 25 may also be connected through a flexible circuit board 29 a. Preferably, the flexible circuit board 29a is disposed corresponding to the planar area 117 where the pole post 12 is not disposed, and the second input terminal 25 is electrically connected to the planar area 117. The encapsulation film 40 encapsulates the flexible circuit board 29a, and the second output terminal 27 protrudes from the encapsulation film 40.

The first input terminal 21 and the second input terminal 25 are of a conductive material. In particular, in some embodiments, the first input end 21 may be a conductive foam to be adhered to the post 12 and electrically connected to the post 12; the second input terminal 25 may be a conductive foam to bond with the housing 11 and electrically connect with the housing 11.

In some embodiments, the encapsulation film 40 may be integrally formed with the battery main body 10 and the electrical connection structure 20 through injection molding, so that the encapsulation film 40 not only covers the outer sides of the battery main body 10 and the electrical connection structure 20, but also fills a gap between the battery main body 10 and the electrical connection structure 20 (e.g., a gap between the first output end 23 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. 28, a portion of the encapsulation film 40 is directly injected on the bottom wall 113 and the side wall 115 of the battery body 10 to cover the bottom wall 113, the side wall 115 and the electrical connection structure 20, so that only the first output end 23 and the second output end 27 are exposed out of the injection-molded encapsulation film 40. The battery 100 may further include a separable packaging film to cover a region of the battery body 10 that is not encapsulated by the injection-molded packaging film 40. As shown in fig. 29, the packaging film 40 is integrally formed on the entire battery body 10 by injection molding, and covers the electric connection structure 20 except for the first output end 23 and the second output end 27.

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 and a first output end electrically connected with the first input end, the first input end is electrically connected with the pole, the first output end is arranged along the plane where the side wall is located, and the first output end is insulated from the shell.
The battery of claim 1, wherein the electrical connection structure further comprises a flexible circuit board, the first input terminal being connected to the first output terminal through the flexible circuit board.
The battery of claim 2, wherein the first output terminal is an electronic wire, the electronic wire is disposed along a plane where the side wall is located, and one end of the electronic wire is connected to the flexible circuit board, and the other end of the electronic wire extends out of the top wall.
The battery of claim 2, wherein the first output terminal is a pad, a gold finger, a conductive strip or a connector, and the first output terminal is disposed at a region of the flexible circuit board corresponding to the sidewall.
The battery of claim 2, wherein the flexible circuit board includes a first portion and a second portion contiguous with the first portion, the first portion being mounted to the housing, the second portion being disposed along a plane of the side wall and extending beyond the top wall, the first output terminal being disposed in a region of the second portion extending from the top wall.
The battery of claim 1, wherein the electrical connection structure further comprises a metal sheet, wherein the first input terminal is connected to the first output terminal through the metal sheet, wherein the metal sheet is disposed along a plane of the side wall and extends out of the top wall, and is insulated from the housing, and wherein the first output terminal is located in a region where the metal sheet extends out of the top wall.
The battery of any of claims 1, 5 and 6, wherein the first output terminal is any one of a pad, a conductive sheet, an electronic wire and a connector.
The battery of claim 1, wherein the electrical connection structure further comprises a second input terminal and a second output terminal electrically connected to the second input terminal, the second input terminal being electrically connected to the housing.
The battery of claim 8, wherein the electrical connection structure further comprises a flexible circuit board or a metal sheet, and the second input terminal is connected to the second output terminal through the flexible circuit board or the metal sheet.
The battery of claim 8, wherein the second output is an electrical wire, a pad, a gold finger, a conductive tab, or a connector.
The battery of claim 8, wherein the first input end is made of conductive foam to be bonded to the terminal post and electrically connected to the terminal 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 8, 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 12 or 13, wherein the encapsulation film is integrally formed with the battery body and the flexible circuit board by injection molding.
The battery according to claim 12, 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.