CN216120518U

CN216120518U - Battery cover plate and battery

Info

Publication number: CN216120518U
Application number: CN202121770078.3U
Authority: CN
Inventors: 靳建明
Original assignee: Shanghai Zhishun New Energy Technology Co ltd
Current assignee: Shanghai Zhishun New Energy Technology Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-03-22
Anticipated expiration: 2031-07-30

Abstract

The application discloses battery apron and battery, the battery apron of this application includes: the first substrate, the first composite layer, the adhesive layer, the second composite layer and the second substrate; wherein, the first composite layer is arranged on the first substrate; the adhesive layer is arranged on the first composite layer; the second composite layer is arranged on the adhesive layer; the second substrate is arranged on the second composite layer. The battery cover plate comprises a first substrate, a first composite layer, a glue joint layer, a second composite layer and a second substrate, the structural strength of the battery cover plate can be improved, and the requirements of the battery cover plate on structural strength, sealing performance and durability when the battery cover plate is used as a structural member and a sealing member are met.

Description

Battery cover plate and battery

Technical Field

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

Background

In the prior art, a battery cover plate in a traditional button battery adopts a riveting structure, the traditional riveting structure has higher requirement on the strength of the riveting structure due to the fact that a certain compression ratio of a sealing ring needs to be ensured, the sealing effect is gradually reduced due to temperature aging and the like in the using process, the reliability is reduced, the manufacturing process is complex, the thickness of the battery cover plate is larger, and the common thickness is larger than 1 mm.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a battery apron and battery, its structural strength that can improve the battery apron.

The embodiment of the application is realized as follows:

in a first aspect, the present application provides a battery cover plate, the battery cover plate of the present application comprising: the first substrate, the first composite layer, the adhesive layer, the second composite layer and the second substrate. Wherein, the first composite layer is arranged on the first substrate; the adhesive layer is arranged on the first composite layer; the second composite layer is arranged on the adhesive layer; the second substrate is arranged on the second composite layer.

In one embodiment, the first substrate, the first composite layer, the adhesive layer, the second composite layer and the second substrate are all cylindrical.

In one embodiment, the axes of the first substrate, the first composite layer, the adhesive layer, the second composite layer and the second substrate are coincident.

In one embodiment, the first substrate and the second substrate have the same thickness, and the first composite layer and the second composite layer have the same thickness.

In one embodiment, the thickness of the first substrate is greater than the thickness of the first composite layer.

In one embodiment, the first substrate and the first composite layer have the same diameter, and the adhesive layer has a diameter smaller than the diameter of the first composite layer and the diameter of the first substrate.

In one embodiment, the diameter of the second composite layer is equal to the diameter of the second substrate, and the diameters of the second composite layer and the second substrate are smaller than the diameter of the adhesive layer.

In a second aspect, the present application provides a battery comprising: battery cover, casing and electrode subassembly. The shell is connected with the battery cover plate, and a first opening is formed in the shell; the electrode assembly is disposed within the housing.

In one embodiment, the battery cover plate covers the first opening.

In one embodiment, the battery cover plate and the housing are connected by welding.

Compared with the prior art, the beneficial effect of this application is: the battery cover plate comprises a first substrate, a first composite layer, a glue joint layer, a second composite layer and a second substrate, the structural strength of the battery cover plate can be improved, the requirements of the battery cover plate for structural strength, sealing performance and durability when used as a structural member and a sealing member are met, the battery cover plate is enabled to have smaller sealing space, more reliable sealing performance and better structural strength, and the battery cover plate can be made to be lighter and thinner.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

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 cover plate according to an embodiment of the present disclosure.

Icon:

1-a battery cover plate; 11-a first substrate; 12-a first composite layer; 13-a glue joint layer; 14-a second composite layer; 15-a second substrate; 2-a shell; 3-an electrode assembly; 100-cell.

Detailed Description

The terms "first," "second," "third," and the like are used for descriptive purposes only and not for purposes of indicating or implying relative importance, and do not denote any order or order.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "upper", "lower", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when products of the application are used, and are used only for convenience in describing the application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application.

In the description of the present application, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a battery according to an embodiment of the present application. A battery 100, comprising: battery cover 1, case 2, and electrode assembly 3. A first opening is arranged on the shell 2, and the shell 2 is connected with the battery cover plate 1; the electrode assembly 3 is disposed within the case 2. The battery cover plate 1 covers the first opening; the battery cover plate 1 and the shell 2 are connected by welding.

In one embodiment, the battery cover plate 1 is welded (welded) to the first opening of the housing 2 to form an external supporting and sealing structure of the battery, and the welding is performed while ensuring sufficient welding strength and liquid-gas sealing effect of the battery 100. For example: the welding mode can be laser welding, resistance welding and the like.

In another embodiment, the battery cover plate 1 and the housing 2 may be connected by other methods, and the connection method of the battery cover plate 1 and the housing 2 is not limited in this application.

The battery cover plate 1 in the application can be used as a sealing structure for a micro button type lithium ion battery.

Fig. 2 is a schematic structural diagram of a battery cover plate according to an embodiment of the present disclosure. A battery cover plate 1 comprising: a first substrate 11, a first composite layer 12, an adhesive layer 13, a second composite layer 14 and a second substrate 15.

The first composite layer 12 is disposed on the first substrate 11, the adhesive layer 13 is disposed on the first composite layer 12, the second composite layer 14 is disposed on the adhesive layer 13, and the second substrate 15 is disposed on the second composite layer 14.

The first substrate 11, the first composite layer 12, the adhesive layer 13, the second composite layer 14 and the second substrate 15 are all cylindrical. The axes of the first substrate 11, the first composite layer 12, the adhesive layer 13, the second composite layer 14 and the second substrate 15 are overlapped. The thicknesses of the first substrate 11 and the second substrate 15 are equal, the thicknesses of the first composite layer 12 and the second composite layer 14 are equal, and the thickness of the first substrate 11 is greater than the thickness of the first composite layer 12.

The diameters of the first substrate 11 and the first composite layer 12 are equal, and the diameter of the adhesive layer 13 is smaller than the diameters of the first composite layer 12 and the first substrate 11; the diameter of the second composite layer 14 is equal to the diameter of the second substrate 15, and the diameters of the second composite layer 14 and the second substrate 15 are smaller than the diameter of the adhesive layer 13.

In another embodiment, the thickness and diameter of the first substrate 11, the first composite layer 12, the adhesive layer 13, the second composite layer 14 and the second substrate 15 can be freely selected according to the requirement.

In an operation process, the first substrate 11 and the second substrate 15 are made of stainless steel plates with high strength and rigidity, and are formed by punching, machining and the like, so that a structural supporting function is achieved, and sufficient structural strength and stability are provided.

Compounding an aluminum or nickel or copper metal layer on the surface of the first substrate 11 in an electroplating manner to form a first compound layer 12; a second composite layer 14 is formed by laminating a metal layer of aluminum, nickel or copper on the surface of the second substrate 15 by electroplating. The first composite layer 12 and the second composite layer 14 can increase the bonding strength, the fatigue strength, and the fatigue durability of the adhesive layer 13 and the first substrate 11 and the second substrate 15.

The aluminum or nickel or copper metal of the first composite layer 12 and the second composite layer 14 has better bonding effect than stainless steel and adhesive bonding material, and the adhesive bonding strength and fatigue durability are better. If necessary, the surfaces of the first composite layer 12 and the second composite layer 14 need to be physically or chemically surface-treated to further increase the bonding effect with the adhesive layer. The first composite layer 12 and the second composite layer 14 may also solve the problem of incompatibility of the battery cap plate 1 in terms of sealing effect, structural strength, and structural thickness.

The adhesive layer 13 is made of Polyethylene (PE), cut to shape by a grinding tool, and thermally bonded to the first composite layer 12 and the second composite layer 14 under the conditions of heating and pressurizing, so as to provide sufficient bonding strength, sealing performance and insulation. The material of the adhesive layer 13 can be selected according to the stability of the material in moisture and organic solvent and the adhesive strength with metal. The temperature and pressure for thermal bonding the bonding layer 13 to the first composite layer 12 and the second composite layer 14 can be freely selected according to the requirement. The adhesive layer 13 is preferably made of epoxy resin or polypropylene (PP) single-component material or composite material.

In another embodiment, the first substrate 11 and the second substrate 15 may be made of metal such as aluminum, iron, nickel, and alloys thereof, and iron-based alloys such as stainless steel, and may be formed by pressing, machining, powder metallurgy, and the like to change the shape, size, and surface roughness of the first substrate 11 and the second substrate 15, so that the surface roughness of the first substrate 11 and the second substrate 15 is reduced and smoothed. The first substrate 11 and the second substrate 15 are preferably made of an iron-based alloy such as stainless steel having high strength and rigidity, and ensure the strength and stability of the entire structure of the cover plate.

In another embodiment, the material of the first substrate 11 and the second substrate 15 may be different, or the processing manner may be different, and the material of the first substrate 11 and the second substrate 15 may be freely selected according to the requirement.

In another embodiment, the first composite layer 12 and the second composite layer 14 may be made of metal materials such as aluminum, nickel, and gold, or non-metal materials such as polypropylene (PP), Polyethylene (PE), and teflon; and can be compounded on the surface of the first substrate 11 by injection molding, thermal compounding, screen printing, spraying, physical or chemical coating, mechanical compounding and the like. The first composite layer 12 and the second composite layer 14 are preferably made of aluminum or nickel, and are preferably processed by mechanical lamination, electroplating, and physical or chemical plating.

In another embodiment, the materials of the first composite layer 12 and the second composite layer 14 may be different, or the processing method may be different, and the materials of the first composite layer 12 and the second composite layer 14 may be freely selected according to the needs.

In another embodiment, the adhesive layer 13 may be made of non-metal adhesive materials such as epoxy resin, polypropylene (PP), Polyethylene (PE), and acrylic acid, and the processing method may be pressing and screen printing.

In another embodiment, the material of the adhesive layer 13 can be freely selected according to the requirement.

In one embodiment, the first composite layer 12 and the second composite layer 14 need to be surface-treated before the adhesive layer 13 is glued, so as to increase the gluing effect, enhance the gluing strength and increase the gluing tightness.

The battery cover plate 1 with the glue joint structure is used for sealing the battery, the battery cover plate does not need to set a compression ratio for the sealing ring, and a smaller sealing space is needed compared with a traditional sealing mode; the sealing mode of the adhesive joint is optimized, and the sealing device has more reliable sealing performance and higher structural strength and stability compared with the traditional sealing mode of direct adhesive joint.

Compare the sealing method sealed space that traditional sealing method this application used littleer, sealing performance is more reliable and structural strength is higher, and the battery apron 1 of this application is more frivolous, and the thickness of battery apron 1 can be less than 1 mm.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery cover plate, characterized in that the battery cover plate comprises:

a first substrate;

the first composite layer is arranged on the first substrate;

the adhesive layer is arranged on the first composite layer;

the second composite layer is arranged on the adhesive layer;

and the second substrate is arranged on the second composite layer.

2. The battery cover plate of claim 1, wherein the first substrate, the first composite layer, the adhesive layer, the second composite layer, and the second substrate are all cylindrical.

3. The battery cover plate according to claim 1, wherein axes of the first substrate, the first composite layer, the adhesive layer, the second composite layer, and the second substrate coincide.

4. The battery cover plate according to claim 1, wherein the first substrate and the second substrate have the same thickness, and the first composite layer and the second composite layer have the same thickness.

5. The battery cover plate according to claim 4, wherein the first substrate has a thickness greater than that of the first composite layer.

6. The battery cover plate according to claim 1, wherein the first substrate and the first composite layer are equal in diameter;

the diameter of the adhesive layer is smaller than the diameters of the first composite layer and the first substrate.

7. The battery cover plate according to claim 1, wherein the diameter of the second composite layer is equal to the diameter of the second substrate;

the diameters of the second composite layer and the second substrate are smaller than the diameter of the adhesive layer.

8. A battery, comprising:

the battery cover plate according to any one of claims 1 to 7;

the shell is connected with the battery cover plate and is provided with a first opening;

an electrode assembly disposed within the housing.

9. The battery of claim 8, wherein the battery cover covers the first opening.

10. The battery of claim 8, wherein the battery cover plate is connected to the housing by welding.