CN218918993U

CN218918993U - Battery and electronic equipment

Info

Publication number: CN218918993U
Application number: CN202223265306.9U
Authority: CN
Inventors: 吴常青
Original assignee: Zhuhai Cosmx Battery Co Ltd
Current assignee: Zhuhai Cosmx Battery Co Ltd
Priority date: 2022-12-05
Filing date: 2022-12-05
Publication date: 2023-04-25
Anticipated expiration: 2032-12-05

Abstract

The embodiment of the application provides a battery and electronic equipment, wherein the battery comprises a battery core, an outer film and a first heat conduction piece arranged on the outer surface of the outer film; the outer film forms a containing cavity for containing the battery cell, the outer film comprises a plurality of packaging edges, and a first tab of the battery cell extends out of the outer film through a first packaging edge of the plurality of packaging edges; one end of the first heat conduction piece is connected with the outer film, and the other end of the first heat conduction piece is connected with the positive electrode lug of the battery cell. Through set up first heat-conducting piece at the surface of adventitia, and be connected with the utmost point ear of electric core to increase the radiating area of electric core, improve the radiating efficiency of battery, and then improve the security performance of battery.

Description

Battery and electronic equipment

Technical Field

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

Background

With the advent of the fifth Generation mobile communication (5 th-Generation, 5G) age, lithium ion batteries have evolved rapidly. With the continuous increase of battery energy density, the requirement for quick charge performance of batteries is also continuously increased, and the increase of the charge rate of batteries is an important point in the development of lithium ion batteries. However, the charge and discharge of the lithium ion battery under high multiplying power can obviously increase the temperature rise of the battery, so that a certain range of high Wen Reou is formed in the battery, the internal heat is not easy to transfer to the outside of the battery, the overall temperature of the battery is quickly increased, the stability of the anode and cathode, electrolyte and the like in the battery is affected, some side reactions are easily formed in the battery, the battery performance is deteriorated, the battery is inflated due to byproducts such as gas and the like, and thermal runaway can be possibly caused under severe conditions.

Disclosure of Invention

The embodiment of the application provides a battery and electronic equipment to solve among the prior art, because the inside heat of battery is difficult for transmitting outside the battery, lead to the battery to heat up too fast, thereby probably arouse the problem of thermal runaway.

In order to solve the technical problems, the application is realized as follows:

in a first aspect, embodiments of the present application provide a battery, including a battery cell, an outer film, and a first heat conductive member disposed on an outer surface of the outer film;

the outer film forms a containing cavity for containing the battery cell, the outer film comprises a plurality of packaging edges, and a first tab of the battery cell extends out of the outer film through a first packaging edge of the plurality of packaging edges;

one end of the first heat conduction piece is connected with the outer film, and the other end of the first heat conduction piece is connected with the first tab.

Optionally, the outer film includes a first outer surface, one end of the first heat conducting member is connected to the first outer surface, and the other end is connected to the first tab.

Optionally, a first thinning area is arranged on the first outer surface, and the first heat conducting piece is located in the first thinning area.

Optionally, the first outer surface includes a first side and a second side disposed around the first side, the second side connecting the first side and the plurality of package sides;

the first thinning area is located on the first side face.

Optionally, a perpendicular projection area of the first heat conducting piece on the first packaging edge is greater than or equal to 50% of a perpendicular projection area of the first tab on the first packaging edge.

Optionally, the battery further includes a first insulating adhesive layer disposed on a surface of the first heat conducting member, and the first thinned region is located in a vertical projection region of the first insulating adhesive layer on the first outer surface.

Optionally, the outer film comprises a multi-layer film layer, the multi-layer film layer comprises at least one metal film layer, one end of the first heat conducting piece is connected with the metal film layer, and the other end of the first heat conducting piece is connected with the first tab.

Optionally, the outer film further comprises a second outer surface, the first outer surface is opposite to the second outer surface, the battery further comprises a second heat conduction piece, one end of the second heat conduction piece is connected with the second outer surface, and the other end of the second heat conduction piece is connected with the first tab.

Optionally, the second outer surface is provided with a second thinning area, and the second heat conducting piece is located in the second thinning area.

In a second aspect, embodiments of the present application provide an electronic device comprising a battery as described in the first aspect.

In the embodiment of the application, the battery comprises a battery cell, an outer film and a first heat conducting piece arranged on the outer surface of the outer film, wherein the outer film forms a containing cavity for containing the battery cell, the outer film comprises a plurality of packaging edges, and a first tab of the battery cell extends out of the outer film through a first packaging edge in the plurality of packaging edges; one end of the first heat conduction piece is connected with the outer film, and the other end of the first heat conduction piece is connected with the first tab. Through set up first heat-conducting piece at the surface of adventitia, and be connected with the utmost point ear of electric core to increase the radiating area of electric core, improve the radiating efficiency of battery, and then improve the security performance of battery.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments of the present application will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a battery according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a battery according to an embodiment of the present disclosure;

fig. 3 is a side view of a battery provided in an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance. But merely to distinguish between different components. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate a relative positional relationship, which changes accordingly when the absolute position of the object to be described changes.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery according to an embodiment of the present application. The battery comprises an electric core 10, an outer film 20 and a first heat conducting piece 30 arranged on the outer surface of the outer film 20;

the outer film 20 forms a containing cavity, the containing cavity is used for containing the battery cell 10, the outer film 20 comprises a plurality of packaging edges, and the first tab 11 of the battery cell 10 extends out of the outer film 20 through a first packaging edge of the plurality of packaging edges;

one end of the first heat conducting member 30 is connected to the outer film 20, and the other end is connected to the first tab 11.

It should be understood that the battery in the embodiments of the present application may be a lithium ion battery, in which the first package side of the battery is formed by two oppositely disposed outer films, and the first tab 11 of the battery cell 10 extends out of the outer film 20 through the first package side (between the two outer films). The first tab 11 may be a positive tab or a negative tab. The positive electrode tab is usually made of an aluminum material, the negative electrode tab can be made of a nickel material, and the negative electrode tab can also be made of a copper nickel plating material.

When the first tab 11 is a positive tab, the first heat conducting member 30 may be made of the same material as the first tab 11, for example, aluminum. When the first tab 11 is a negative tab, the first heat conducting member 30 may be made of the same material as the first tab 11, for example, nickel material, copper nickel plating material, or the like.

In addition, the first heat conducting member 30 may be made of the same material as the first tab 11 of the battery cell 10, so as to improve the connection stability between the first heat conducting member 30 and the first tab 11 of the battery cell 10. In a specific implementation, the first heat conducting member 30 and the first tab 11 of the battery cell 10 may be connected by welding.

In this embodiment, this battery includes electric core 10, adventitia 20 and sets up in the first heat-conducting piece 30 of the surface of adventitia 20, and adventitia 20 forms the accommodation chamber for holding electric core 10, and adventitia 20 includes a plurality of encapsulation limit, and outer membrane 20 is stretched out to the first utmost point ear 11 of electric core 10 through the first encapsulation limit in a plurality of encapsulation limit, and the one end and the adventitia 20 of first heat-conducting piece 30 are connected, and the other end is connected with the first utmost point ear 11 of electric core 10. Through set up first heat-conducting piece 30 at the surface of adventitia 20, and be connected with the first utmost point ear 11 of electric core 10 to increase the heat radiating area of electric core 10, improve the radiating efficiency of battery, and then improve the security performance of battery.

In an alternative embodiment, as shown in fig. 3, the outer film 20 includes a first outer surface 21, and one end of the first heat conductive member is connected to the first outer surface 21, and the other end is connected to the first tab 11.

It should be understood that the outer film 20 wraps the battery core 10, two surfaces are provided in the thickness direction of the battery core 10, one end of the first heat conducting member 30 is connected with the first outer surface 21 of the two surfaces, and heat in the battery core 10 is conducted to the first outer surface 21 through the first tab 11 and the first heat conducting member 30, compared with the prior art, the heat dissipation area can be increased only by dissipating heat through the first tab 11, and the increased heat dissipation area is the sum of the areas of the first tab 11, the first heat conducting member 30 and the outer film 20.

The first heat conductive member 30 may be welded to the surface of the outer film 20 without contacting the battery cell 10, the electrolyte, etc. inside the outer film 20, thereby preventing the corrosion of the first heat conductive member 30 by the electrolyte.

In an alternative embodiment, a first thinned region 211 is disposed on the first outer surface 21, and the first heat conductive member 30 is located in the first thinned region 211.

It should be appreciated that the thickness of the first thinned region 211 is less than the thickness of other regions of the first outer surface 21.

Taking the first tab 11 as a positive electrode tab for illustration, the outer film 20 surrounding the battery cell 10 may be an aluminum plastic film. The aluminum plastic film is formed by compounding three nylon layers with different thicknesses, an aluminum layer and a PP layer, and the nylon layer is the outermost layer which is arranged back to the battery cell 10. At this time, the first thinning region 211 may have only two layers of an aluminum layer and a PP layer, and the first heat conductive member 30 is located in the first thinning region 211 and connected to the aluminum layer in the first thinning region 211, so that the entire outer film becomes a direct heat dissipation medium. The first thinning region 211 may be formed by polishing or subtractive, which is not limited in this embodiment.

In an alternative embodiment, the first outer surface 21 includes a first side surface and a second side surface disposed around the first side surface, the second side surface connecting the first side surface and the plurality of package sides;

the first thinned region 211 is located on the first side.

It should be appreciated that the first outer surface 21 is formed by a first side, a second side surrounding the first side, and a plurality of encapsulation edges. When the battery cell 10 is packaged by the outer film 20, a region in the width direction of the battery cell 10 is a plane (i.e., a first side surface), and a region intersecting the width direction of the battery cell 10 and the thickness direction of the battery cell 10 is a cambered surface (i.e., a second side surface).

In an alternative embodiment, the vertical projection area of the first heat conducting member 30 on the first package side is greater than or equal to 50% of the vertical projection area of the first tab 11 on the first package side.

It should be understood that the contact area between the first heat conducting member 30 and the first tab 11 may be greater than 50% of the contact area between the first heat conducting member 30 and the first tab 11, and the connection stability between the first heat conducting member 30 and the first tab 11 may be improved.

In an alternative embodiment, the battery further includes a first insulating adhesive layer 40 disposed on a surface of the first heat conductive member 30, and the first thinned region 211 is located in a vertical projection area of the first insulating adhesive layer 40 on the first outer surface 21.

It should be understood that, after the first heat conductive member 30 is located in the first thinned region 211, the first insulating adhesive layer 40 covers the first heat conductive member 30, and the area of the first insulating adhesive layer 40 is not smaller than the first thinned region 211, so as to perform insulation protection on the outer film 20, thereby preventing the battery from being shorted.

In an alternative embodiment, the outer film 20 includes a plurality of film layers, the plurality of film layers includes at least one metal film layer, and one end of the first heat conductive member 30 is connected to the metal film layer, and the other end is connected to the first tab 11.

The metal film layer may be an aluminum layer, a nickel layer, a copper nickel plating layer, etc., which is not limited in this embodiment.

Taking the outer film 20 as an example of an aluminum plastic film, the aluminum plastic film is formed by compounding three nylon layers, an aluminum layer and a PP layer with different thicknesses, and the nylon layer is the outermost layer which is arranged back to the battery cell 10, and at this time, the metal film layer is the aluminum layer.

Optionally, as shown in fig. 2, the outer film 20 further includes a second outer surface 22, the first outer surface 21 is disposed opposite to the second outer surface 22, and the battery further includes a second heat conductive member 50, one end of the second heat conductive member 50 is connected to the second outer surface 22, and the other end is connected to the first tab 11.

It should be understood that the second outer surface 22 is the other surface of the two surfaces, specifically, in the thickness direction of the battery cell, the second outer surface 22 is opposite to the first outer surface 21, and the first tab 11 is sandwiched between the first heat conducting member 30 and the second heat conducting member 50. Similarly, the second heat conducting member 50 may be made of the same aluminum material as the first tab 11 of the battery cell 10, so as to improve the connection stability between the second heat conducting member 50 and the first tab 11 of the battery cell 10. Specifically, the second heat conducting member 50 and the first tab 11 of the battery cell 10 may also be connected by welding.

In this embodiment, by arranging one end of the second heat conducting member 50 to be connected with the second outer surface 22 and the other end to be connected with the first tab 11, the heat in the battery cell 10 can be conducted to the second outer surface 22 through the first tab 11 and the second heat conducting member 50, and compared with the case where only the first heat conducting member 30 is arranged, the heat dissipation area is increased, and the increased heat dissipation area is the sum of the areas of the first tab 11, the first heat conducting member 30, the second heat conducting member 50 and the outer film 20. In addition, since two heat conducting members are provided and are respectively connected to the two outer surfaces, heat in the battery cell 10 can be respectively conducted to the first outer surface 21 and the second outer surface 22 via the first heat conducting member 30 and the second heat conducting member 50, and heat dissipation efficiency can be improved.

In another alternative embodiment, the second outer surface 22 is provided with a second thinned region 221, and the second heat conductive member 50 is located in the second thinned region 221.

It should be appreciated that the second thinned region 221 may be disposed opposite the first thinned region 211, with the thickness of the second thinned region 221 being less than the thickness of other regions of the second outer surface 22. Since the second thinning region 221 has the same features and functions as the first thinning region 211, at least the whole technical effects related to the first thinning region 211 can be achieved, and will not be described in detail herein.

Optionally, the second outer surface 22 includes a third side and a fourth side disposed around the third side, the fourth side connecting the third side and the plurality of package sides;

the second thinned region 221 is located on the third side.

Optionally, the perpendicular projection area of the second heat conducting member 50 on the first package side is greater than or equal to 50% of the perpendicular projection area of the first tab 11 on the first package side.

Optionally, the battery further includes a second insulating glue layer 60 disposed on a surface of the second heat conductive member 50, and the second thinned region 221 is located in a vertical projection region of the second insulating glue layer 60 on the second outer surface 22.

Optionally, the outer film comprises a multi-layer film layer, the multi-layer film layer comprises at least one metal film layer, one end of the second heat conduction piece is connected with the metal film layer, and the other end of the second heat conduction piece is connected with the first tab.

The application also provides electronic equipment comprising the battery. Because the technical solution of the present embodiment includes all the technical solutions of the foregoing embodiments, at least all the technical effects of the foregoing embodiments can be achieved, which is not described herein in detail.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes or substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A battery is characterized by comprising a battery core, an outer film and a first heat conduction piece arranged on the outer surface of the outer film;

2. The battery of claim 1, wherein the outer film includes a first outer surface, one end of the first heat conductive member is connected to the first outer surface, and the other end is connected to the first tab.

3. The battery of claim 2, wherein the first outer surface is provided with a first thinned region, and the first thermally conductive member is located in the first thinned region.

4. The battery of claim 3, wherein the first outer surface comprises a first side and a second side disposed around the first side, the second side connecting the first side and the plurality of package sides;

the first thinning area is located on the first side face.

5. The battery of claim 1, wherein a perpendicular projected area of the first thermally conductive member on the first package side is greater than or equal to 50% of a perpendicular projected area of the first tab on the first package side.

6. The battery of claim 3, further comprising a first insulating glue layer disposed on a surface of the first thermally conductive member, and wherein the first thinned region is located within a vertically projected region of the first insulating glue layer on the first outer surface.

7. The battery of claim 1, wherein the outer film comprises a multi-layer film comprising at least one metal film layer, one end of the first thermally conductive member being connected to the metal film layer and the other end being connected to the first tab.

8. The battery of claim 2, wherein the outer film further comprises a second outer surface, the first outer surface being disposed opposite the second outer surface, the battery further comprising a second thermally conductive member having one end connected to the second outer surface and the other end connected to the first tab.

9. The battery of claim 8, wherein the second outer surface is provided with a second thinned region, the second thermally conductive member being located in the second thinned region.

10. An electronic device comprising a battery as claimed in any one of claims 1-9.