CN111403803A - Battery and electronic device with same - Google Patents

Abstract

The present application provides a battery, including an electrode assembly and a shell for accommodating the electrode assembly. The battery also includes an extension portion and a circuit board. The extension portion is connected to the shell and forms a receiving space together with the shell. The circuit board is received in the receiving space and is electrically connected to the electrode assembly. The battery in the present application forms a receiving space for accommodating the circuit board by providing an extension portion to cooperate with the shell to protect the circuit board and avoid damage to the circuit board due to transportation or testing. In addition, compared with the solution of protecting the circuit board with a traditional bracket, the extension portion occupies a smaller space, so that while it plays a role in protecting the circuit board, it also greatly improves the energy density of the battery. The present application also provides an electronic device having the battery.

Description

Battery and electronic device having the same

technical field

The present application relates to the field of electrochemistry, and in particular, to batteries and electronic devices having the batteries.

Background technique

Lithium-ion batteries are widely used in mobile terminals, smart mobile homes, smart aircraft and other fields due to their advantages of high energy density, high reliability, and many cycles of use. Therefore, in order to meet the increasing functional requirements of products in different fields, the requirements for batteries are also increasing. However, the current lithium-ion battery is generally formed by assembling a protective plate and a cell, and the components on the protective plate are usually exposed, so problems such as battery failure due to component damage are likely to occur during assembly. In this regard, an additional bracket is generally used to protect the protective plate, but the arrangement of the bracket will affect the energy density of the battery.

SUMMARY OF THE INVENTION

In view of this, it is necessary to provide a battery to solve the above problems.

The present application also provides an electronic device having the battery.

A battery includes an electrode assembly and a casing for accommodating the electrode assembly; the battery also includes:

an extension part, the extension part is connected to the casing and forms a receiving space together with the casing; and

A circuit board is accommodated in the accommodation space and is electrically connected to the electrode assembly.

Optionally, the extension portion is formed by extending outward from the housing.

Optionally, the casing includes a top surface, a bottom surface facing away from the top surface, and a peripheral surface connected between the top surface and the bottom surface, and the extension portion is composed of the top surface and the bottom surface. and one or more of the peripheral surfaces extend outward.

Optionally, the extension part includes a side wall and a connecting wall, the side wall is disposed opposite to the casing, the connecting wall is connected between the casing and the side wall, the casing, The connecting wall and the side wall together form the receiving space.

Optionally, the battery includes a tab connected to the electrode assembly and exposed on a surface of the casing facing the side wall; the tab is electrically connected to the circuit board.

Optionally, the circuit board includes a first surface facing the tabs and a second surface facing away from the first surface, the first surface is provided with electrical connectors, and the electrical connectors connect the Pole ear.

Optionally, the electrical connector is in the form of a dome type, a spring type, an L-shape or a plane type.

Optionally, the second surface is provided with an outer part, and the outer part is exposed from the extension part.

Optionally, the circuit board is perpendicular to the connecting wall, and the second surface faces the side wall.

Optionally, the battery further includes a fixing member, the fixing member connects the circuit board, the extension portion and the casing, and electrically insulates the circuit board from the extension portion and the casing .

An electronic device includes the above-mentioned battery.

The arrangement of the extension part described in this application protects the circuit board and avoids the problem of damage to the circuit board due to transportation or testing. In addition, compared with the traditional solution of protecting the circuit board by the bracket, the space occupied by the extension portion is smaller, so that while protecting the circuit board, the energy density of the battery is greatly improved.

Description of drawings

FIG. 1 is a schematic structural diagram of a battery according to an embodiment of the present application.

FIG. 2 is an exploded schematic view of the battery shown in FIG. 1 .

FIG. 3 is a schematic structural diagram of the circuit board shown in FIG. 1 .

FIG. 4 is a schematic structural diagram of a battery according to another embodiment of the present application.

FIG. 5 is a schematic structural diagram of an extension part and a casing without bending processing according to an embodiment of the present application.

FIG. 6 is a schematic structural diagram of an extension part, a circuit board and a casing without bending processing according to an embodiment of the present application.

FIG. 7 is a schematic structural diagram of a circuit board according to another embodiment of the present application.

FIG. 8 is a schematic structural diagram of a battery according to another embodiment of the present application.

FIG. 9 is a schematic structural diagram of a battery according to another embodiment of the present application.

FIG. 10 is a schematic block diagram of an electronic device according to an embodiment of the present application.

Description of main component symbols

Electronic device 1

battery 10

Electrode assembly 11

Housing 12

Top 121

Bottom 122

Perimeter 123

upper surface 1231

lower surface 1232

Left surface 1233

Right face 1234

Injection hole 124

Filling plug 125

extension 13

side wall 131

connecting wall 132

circuit board 14

first surface 141

second surface 142

Electrical connectors 143

first electrical connection piece 1431

Second electrical connection piece 1432

External accessories 144

Bonding parts 145

Containment space 15

Tab 16

Fixtures 17

The following specific embodiments will further illustrate the present application in conjunction with the above drawings.

Detailed ways

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. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are for the purpose of describing specific embodiments only, and are not intended to limit 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 features in the embodiments may be combined with each other without conflict.

Referring to FIG. 1 , an embodiment of the present application discloses a battery 10 . Please also refer to FIG. 2 , the battery 10 includes an electrode assembly 11 and a case 12 for accommodating the electrode assembly 11 . Wherein, the battery 10 further includes an extension portion 13 and a circuit board 14 . The extension portion 13 is connected to the casing 12 and forms a receiving space 15 together with the casing 12 . The circuit board 14 is accommodated in the accommodating space 15 and is electrically connected to the electrode assembly 11 .

The arrangement of the extension portion 13 in the present application protects the circuit board 14 and avoids the problem of damage to the circuit board 14 due to transportation or testing. In addition, compared with the conventional solution of protecting the circuit board 14 with a bracket, the space occupied by the extension portion 13 is smaller, so that while protecting the circuit board 14 , the energy density of the battery 10 is greatly improved.

Of course, the battery 10 also includes an electrolyte (not shown). The electrolyte is accommodated in the casing 12 .

The extension portion 13 is formed by extending outward from the casing 12 .

Referring to FIG. 1 , the casing 12 includes a top surface 121 , a bottom surface 122 facing away from the top surface 121 , and a peripheral surface 123 connected between the top surface 121 and the bottom surface 122 . The extension portion 13 is formed by extending outward from one or more of the top surface 121 , the bottom surface 122 and the peripheral surface 123 . In this embodiment, the casing 12 is a rectangular parallelepiped. In other embodiments, the casing 12 has a regular structure such as a cylinder, a prism, etc., or other irregular structures.

In one embodiment, the casing 12 is a metal casing. The material of the metal shell is steel alloy, aluminum alloy, iron alloy, copper alloy, nickel alloy, or stainless steel. Referring to FIG. 2 , the casing 12 is further provided with a liquid injection hole 124 . The electrolyte can be injected into the casing 12 through the injection hole 124 . The liquid injection hole 124 is provided with a liquid injection plug 125 . The liquid injection plug 125 is used to seal the liquid injection hole 124 to prevent the injected electrolyte from leaking out or prevent foreign impurities from entering the inside of the casing 12 . The liquid injection hole 124 may be located on any surface of the top surface 121 , the bottom surface 122 and the peripheral surface 123 .

Referring to FIG. 1 , the extension portion 13 includes a side wall 131 and a connecting wall 132 . The side wall 131 is disposed opposite to the casing 12 , and the connecting wall 132 is connected between the casing 12 and the side wall 131 . The housing 12 , the connecting wall 132 and the side wall 131 together form the receiving space 15 .

2 , further, the peripheral surface 123 includes an upper surface 1231 , a lower surface 1232 facing away from the upper surface 1231 , a left surface 1233 and a right surface 1234 facing away from the left surface 1233 . The upper surface 1231 and the lower surface 1232 connect the left surface 1233 and the right surface 1234 . Wherein, the extension portion 13 is formed by extending outward from one or more of the upper surface 1231 , the lower surface 1232 , the left surface 1233 and the right surface 1234 .

Referring to FIG. 2 , in this embodiment, the extension portion 13 is formed by extending outward from the lower surface 1232 . Specifically, the connecting wall 132 is formed by an edge of the lower surface 1232 connected to the top surface 121 extending outward along the length direction of the battery 10 (ie, the X-axis direction). The side wall 131 is connected to a side of the connecting wall 132 away from the top surface 121 and is disposed opposite to the top surface 121 . In this way, the top surface 121 , the connecting wall 132 and the side wall 131 together form the receiving space 15 . In one embodiment, the side wall 131 is perpendicular to the connecting wall 132 .

Referring to FIG. 2 , the battery 10 also includes tabs 16 . The tabs 16 are connected to the electrode assembly 11 and are exposed on the surface of the casing 12 facing the side wall 131 . Wherein, the tabs 16 are also electrically connected to the circuit board 14 . In this embodiment, the battery 10 includes two tabs 16 . The two tabs 16 are exposed on the top surface 121 and are electrically connected to the circuit board 14 . In other embodiments, the number of tabs 16 in the battery 10 can be adaptively adjusted according to actual needs, and can be three, four, or the like.

It can be understood that, when the tabs 16 are provided on the surface of the housing 12, the extension portion 13 is formed by extending from one or more of the other surfaces connected to the surface. For example, the tabs 16 may be provided on the top surface 121 and/or the bottom surface 122, and the extension portion 13 may be provided by the upper surface 1231, the lower surface 1232, the left surface 1233 and the One or more surfaces of the right surface 1234 are formed by extending; or, if the tabs 16 are provided on the left surface 1233 and/or the right surface 1234, the extending portion 13 can be formed by the top surface 121, the One or more of the bottom surface 122 , the upper surface 1231 and the lower surface 1232 are formed to extend.

The extension portion 13 can optionally be integrally formed with a certain surface of the housing 12 . It should be noted that the extension portion 13 may also be an independent metal sheet connected to the housing 12 by welding, bonding or other connection methods. formed on a certain surface. In this embodiment, the extension portion 13 and the lower surface 1232 are integrally formed.

In this embodiment, the five surfaces of the upper surface 1231 , the left surface 1233 , the right surface 1234 , the top surface 121 and the bottom surface 122 are integrally formed, and are welded with the lower surface 1232 to form the housing 12 . Wherein, the tab 16 may also be provided with one or more of the upper surface 1231 , the lower surface 1232 , the left surface 1233 , the right surface 1234 , the top surface 121 and the bottom surface 122 surface.

2 and 3 , the circuit board 14 includes a first surface 141 facing the tab 16 and a second surface 142 facing away from the first surface 141 . The first surface 141 is provided with electrical connectors 143 . The electrical connector 143 is connected to the tab 16 . In this embodiment, the first surface 141 is provided with two of the electrical connectors 143 . In other embodiments, the number of the electrical connectors 143 may be adaptively adjusted according to the number of the tabs 16 , and may be three, four, or the like.

Referring to FIG. 1 and FIG. 3 , in this embodiment, the circuit board 14 is perpendicular to the connecting wall 132 . At this time, the second surface 142 faces the side wall 131 .

In one embodiment, the electrical connection member 143 is in a spring type, a spring type, an L-shaped or a plane type.

Referring to FIG. 1 and FIG. 3 , the second surface 142 is further provided with an external member 144 . The external component 144 is exposed on the extension portion 13 to serve as an external terminal of the battery 10 , so that the battery 10 can be electrically connected to external electronic components (not shown) by means of the external component 144 . In one embodiment, the external component 144 may be a connector, a gold finger, a flexible circuit board, or the like.

Referring to FIG. 4 , further, the battery 10 further includes a fixing member 17 . The fixing member 17 connects the circuit board 14 , the extension portion 13 and the housing 12 , and electrically insulates the circuit board 14 from the extension portion 13 and the housing 12 . Wherein, the fixing member 17 may be an insulating tape or an injection-molded part.

The battery 10 in the present application will be specifically described below through examples.

Example 1

1 to 3 , a battery 10 includes an electrode assembly 11 , a case 12 for accommodating the electrode assembly 11 , an extension 13 , a circuit board 14 and two tabs 16 .

The electrode assembly 11 is formed by winding or stacking a pole piece and a separator. In the prior art, the formation of the electrode assembly 11 is a relatively common technique, so it is not repeated here.

Referring to FIG. 2 , in Embodiment 1, the casing 12 is a metal casing and is in the shape of a rectangular parallelepiped. The casing 12 includes a top surface 121 , a bottom surface 122 facing away from the top surface 121 , and a peripheral surface 123 connected between the top surface 121 and the bottom surface 122 .

2 , the peripheral surface 123 includes an upper surface 1231 , a lower surface 1232 facing away from the upper surface 1231 , a left surface 1233 and a right surface 1234 facing away from the left surface 1233 . The upper surface 1231 and the lower surface 1232 connect the left surface 1233 and the right surface 1234 . The extension portion 13 is formed by extending outward from the lower surface 1232 .

Referring to FIGS. 1 and 2 , the extending portion 13 includes a side wall 131 and a connecting wall 132 . The connecting wall 132 is formed by the edge of the lower surface 1232 connected to the top surface 121 extending outward along the length direction of the battery 10 . The side wall 131 is connected to the edge of the connecting wall 132 away from the top surface 121 and is disposed opposite to the top surface 121 . Wherein, the side wall 131 is perpendicular to the connecting wall 132 . The top surface 121 , the connecting wall 132 and the side wall 131 together form the receiving space 15 .

Referring to FIG. 3 , the circuit board 14 includes a first surface 141 and a second surface 142 facing away from the first surface 141 . The first surface 141 is provided with two electrical connectors 143 , and the second surface 142 is provided with external components 144 . In Embodiment 1, the electrical connecting member 143 is a plane type, and the external member 144 is a gold finger.

1 , 2 and 3 , the circuit board 14 is accommodated in the accommodation space 15 , and the circuit board 14 is perpendicular to the connecting wall 132 . At this time, the second surface 142 faces the side wall 131 . In Embodiment 1, in the width direction of the battery 10 (ie, the Y-axis direction), the length of the side wall 131 is smaller than the length of the circuit board 14 , so that the circuit accommodated in the accommodating space 15 The external components 144 on the board 14 can be exposed to the extending portion 13 to serve as external terminals of the battery 10 .

The two tabs 16 are connected to the pole pieces in the electrode assembly 11 . The two tabs 16 are exposed on the top surface 121 and are connected to the two electrical connectors 143 correspondingly.

Referring to FIG. 2 , in this embodiment, since the electrical connection member 143 is in a planar shape, an adhesive member 145 may be further provided between the circuit board 14 and the side wall 131 to fix the circuit board 14 , and ensure the connection between the electrical connector 143 and the tab 16 . Wherein, the adhesive member 145 is a foam tape. In other embodiments, the adhesive member 145 may be omitted.

In Example 1, the assembly process of the battery 10 is as follows:

Step 1, referring to FIG. 5 , encapsulate the above-mentioned electrode assembly 11 in the casing 12 . The two tabs 16 are electrically connected to the electrode assembly 11 and are exposed on the top surface 121 . 5 , in the initial state, the extension portion 13 is not subjected to a bending process to form the side wall 131 and the connecting wall 132 . That is, in the initial state, the extending portion 13 is flat.

Step 2, referring to FIG. 6 , place the circuit board 14 on the extending portion 13 vertically, and connect the tabs 16 and the electrical connector 143 by welding.

Step 3, referring to FIG. 1 , the extending portion 13 is bent to form the receiving space 15 for receiving the circuit board 14 . Wherein, the outer member 144 is exposed to the extension portion 13 .

The adhesive member 145 may also be disposed on the second surface 142 of the circuit board 14 before the extension portion 13 is bent.

Example 2

The difference between Embodiment 2 and Embodiment 1 lies in the structure of the electrical connector 143 and the assembly process of the battery 10 .

Referring to FIG. 7 , in Embodiment 2, the electrical connecting piece 143 is in the shape of an elastic sheet, and includes a first electrical connecting piece 1431 and a second electrical connecting piece 1432 connected to the first electrical connecting piece 1431 . The first electrical connection piece 1431 is disposed on the first surface 141 .

In Example 2, the assembly process of the battery 10 is as follows:

In step 1, the above-mentioned electrode assembly 11 is packaged in the casing 12 . The two tabs 16 are electrically connected to the electrode assembly 11 and are exposed on the top surface 121 . Wherein, in the initial state, the extension portion 13 has been bent to form the side wall 131 and the connecting wall 132 .

Step 2: Squeeze the first electrical connecting piece 1431 and the second electrical connecting piece 1432 , and place the circuit board 14 in the receiving space 15 perpendicular to the connecting wall 132 . Among them, since the electrical connecting piece 143 is in the shape of an elastic sheet, after the circuit board 14 is placed in the receiving space 15, under the action of the elastic restoring force of the electrical connecting piece 143, the second electrical connecting piece 1432 spring back and connect the tabs 16 . At the same time, the circuit board 14 is pressed against the side wall 131 under the action of the elastic restoring force of the electrical connector 143 .

Example 3

Referring to FIG. 4 , the difference between Embodiment 3 and Embodiment 2 is that the battery 10 in Embodiment 3 further includes a fixing member 17 , and the fixing member 17 is insulating tape.

In Embodiment 3, the fixing member 17 connects the circuit board 14 , the extension portion 13 and the housing 12 , and enables the circuit board 14 to be electrically connected to the extension portion 13 and the housing 12 . insulation.

Example 4

Referring to FIG. 8 , the difference between Embodiment 4 and Embodiment 3 lies in the structure of the external member 144 .

In Embodiment 4, the external component 144 is a flexible circuit board. Wherein, the flexible circuit board is disposed on the first surface 141 and exposed to the extension portion 13 .

Example 5

Referring to FIG. 9 , the difference between Embodiment 5 and Embodiment 4 lies in the structure of the fixing member 17 .

In Embodiment 5, the fixing member 17 is an injection-molded part. The fixing member 17 is formed by an injection molding process.

Specifically, rubber or plastic is injected into the accommodating space 15 provided with the circuit board 14 to cover the circuit board 14 and connect the housing 12 and the extension portion 13 , so that the circuit board 14 is connected to the The extension portion 13 is electrically insulated from the housing 12 .

Referring to FIG. 10 , the present application further provides an electronic device 1 including the battery 10 . The electronic device 1 may be a mobile electronic device, an energy storage device, an electric vehicle, a hybrid electric vehicle, or the like. The mobile electronic device may be a mobile phone, a wearable electronic device, a tablet computer, a notebook computer, and the like.

The above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced. , without departing from the spirit and essence of the technical solutions of the present application.

Claims (10)

1. A battery including an electrode assembly and a case for housing the electrode assembly, the battery further comprising:

the extension part is connected with the shell and forms an accommodating space together with the shell; and

the circuit board is contained in the containing space and is electrically connected with the electrode assembly.

2. The battery of claim 1, wherein the housing includes a top surface, a bottom surface opposite the top surface, and a peripheral surface connected between the top surface and the bottom surface, the extension being formed by one or more of the top surface, the bottom surface, and the peripheral surface extending outwardly.

3. The battery according to claim 1 or 2, wherein the extension portion includes a side wall disposed opposite to the case, and a connection wall connected between the case and the side wall, the case, the connection wall, and the side wall together forming the housing space.

4. The cell defined in claim 3, wherein the cell includes tabs connected to the electrode assembly and exposed at a surface of the case facing the side wall; the tab is electrically connected with the circuit board.

5. The battery of claim 4 wherein the circuit board includes a first surface facing the tabs and a second surface facing away from the first surface, the first surface being provided with electrical connections connecting the tabs.

6. The battery of claim 5, wherein the electrical connector is in the form of a tab, spring, L, or flat.

7. The battery of claim 5, wherein the second surface is provided with an external connector, and the external connector is exposed from the extension portion.

8. The battery of claim 5, wherein the circuit board is perpendicular to the connecting wall, and the second surface faces the side wall.

9. The battery of claim 1 or 2, further comprising a fastener connecting the circuit board, the extension, and the case and electrically insulating the circuit board from the extension and the case.

10. An electronic device characterized in that the electronic device comprises the battery according to any one of claims 1 to 9.

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