阅读说明：本技术 柔性电池及其制备方法 (Flexible battery and preparation method thereof ) 是由 李赫然 李青 唐赞谦 史晨星 于 2019-09-02 设计创作，主要内容包括：本发明实施例是关于一种柔性电池及其制备方法,涉及电池技术领域,主要目的在于提高锂离子电池的适用性。主要采用技术方案为：柔性电池的制备方法包括：在第一柔性膜层内表面的极组固定区外围设置柔性框体；将电池极组的本体部分设置于柔性框体内；将第二柔性膜层的内表面与第一柔性膜层内表面相对,密封形成柔性包裹膜,使柔性包裹膜包裹电池极组的本体部分于第一柔性膜层的内表面与第二柔性膜层的内表面之间,电池极组的电连接端子部分伸出于柔性包裹膜。相对于现有技术,由于电池极组采用了柔性的包裹膜,并将电池极组通过设置于柔性包裹膜中第一柔性膜层内表面的柔性框体定位,从而可以制备出柔性电池,以满足柔性电子设备可弯曲电池的需求。(The embodiment of the invention relates to a flexible battery and a preparation method thereof, relates to the technical field of batteries, and mainly aims to improve the applicability of a lithium ion battery. The technical scheme is mainly adopted as follows: the preparation method of the flexible battery comprises the following steps: arranging a flexible frame body on the periphery of the pole group fixing area on the inner surface of the first flexible film layer; disposing a body portion of a battery pole group within a flexible frame; the inner surface of the second flexible film layer is opposite to the inner surface of the first flexible film layer, a flexible wrapping film is formed in a sealing mode, the body portion of the battery pole group wrapped by the flexible wrapping film is located between the inner surface of the first flexible film layer and the inner surface of the second flexible film layer, and the electric connection terminal portion of the battery pole group extends out of the flexible wrapping film. Compared with the prior art, because the battery pole group adopts the flexible wrapping film, and the battery pole group is positioned through the flexible frame body arranged on the inner surface of the first flexible film layer in the flexible wrapping film, the flexible battery can be prepared, and the requirement of the flexible battery of the flexible electronic equipment can be met.)

1. A method of making a flexible battery, comprising:

Arranging a flexible frame body on the periphery of the pole group fixing area on the inner surface of the first flexible film layer;

disposing a body portion of a battery pole group within the flexible frame;

the inner surface of a second flexible film layer is opposite to the inner surface of the first flexible film layer, a flexible wrapping film is formed through sealing, the flexible wrapping film wraps the body part of the battery pole group between the inner surface of the first flexible film layer and the inner surface of the second flexible film layer, and the electric connection terminal part of the battery pole group extends out of the flexible wrapping film.

2. the method for preparing the flexible battery according to claim 1, wherein the step of arranging the flexible frame body at the periphery of the pole group fixing region on the inner surface of the first flexible film layer comprises the following steps:

and hot melting hot melt adhesive is melted on the periphery of the pole group fixing area on the inner surface of the first flexible film layer to form the flexible frame body.

3. The method for manufacturing a flexible battery according to claim 2,

The hot melting temperature of the hot melt adhesive is 190 ℃ at 170-.

4. A flexible battery, comprising:

A flexible wrapping film comprising a first flexible film layer and a second flexible film layer, an inner surface edge of the first flexible film layer being sealed against an inner surface edge of the second flexible film layer;

The flexible frame body is arranged on the periphery of the pole group fixing area on the inner surface of the first flexible film layer assembly;

the body part of the battery pole group is wrapped between the inner surface of the first flexible film layer and the inner surface of the second flexible film layer of the flexible wrapping film, is arranged in the flexible frame body, is limited in the fixing area by the flexible frame body, and the electric connection terminal part of the battery pole group extends out of the flexible wrapping film.

5. the flexible battery of claim 4,

the flexible frame body is formed by surrounding a plurality of sections of rubber frames on the periphery of the pole group fixing area.

6. The flexible battery of claim 5,

First intervals are formed among the multiple sections of rubber frames, and the electric connection terminal portions penetrate through the flexible wrapping film through the first intervals.

7. The flexible battery of claim 5,

A second interval is formed between the multiple sections of rubber frames.

8. The flexible battery of claim 7,

The flexible wrapping film is provided with a preset folding line, and the second interval is distributed on the preset folding line.

9. the flexible battery of claim 4,

The flexible wrapping film wraps the periphery of the flexible frame body.

10. the flexible battery according to any one of claims 4-9,

the first flexible film layer or the second flexible film layer comprises an outer layer, a core layer and an inner layer, wherein the core layer is a polyimide film, and the inner layer is a polypropylene film.

Technical Field

The embodiment of the invention relates to the technical field of batteries, in particular to a flexible battery and a preparation method thereof.

Background

the lithium ion battery has the advantages of high energy density, high working pressure, long service life, no memory and the like, and is widely applied to various electronic devices.

The traditional lithium ion battery shell is usually an aluminum shell or a steel shell, the shell is made of hard materials, and a battery pole group of the lithium ion battery is fixed in a groove preset in the shell. In the practical application scenario of electronic devices, there is a gradual trend towards bendable electronic devices, such as foldable mobile phones, and the like, and the existing lithium ion battery cannot meet the applicable requirements of the bendable electronic devices because the housing is made of hard materials and the lithium ion battery cannot be bent.

disclosure of Invention

in view of this, embodiments of the present invention provide a flexible battery and a method for manufacturing the same, and mainly aim to improve the applicability of a lithium ion battery.

In order to achieve the above purpose, the embodiments of the present invention mainly provide the following technical solutions:

in one aspect, an embodiment of the present invention provides a method for manufacturing a flexible battery, including:

arranging a flexible frame body on the periphery of the pole group fixing area on the inner surface of the first flexible film layer;

disposing a body portion of a battery pole group within the flexible frame;

The inner surface of a second flexible film layer is opposite to the inner surface of the first flexible film layer, a flexible wrapping film is formed through sealing, the flexible wrapping film wraps the body part of the battery pole group between the inner surface of the first flexible film layer and the inner surface of the second flexible film layer, and the electric connection terminal part of the battery pole group extends out of the flexible wrapping film.

The purpose of the embodiments of the present invention and the technical problems solved thereby can be further realized by the following technical measures.

optionally, in the preparation method of the flexible battery, the flexible frame is disposed at the periphery of the electrode group fixing region on the inner surface of the first flexible film layer, and the method includes:

And hot melting hot melt adhesive is melted on the periphery of the pole group fixing area on the inner surface of the first flexible film layer to form the flexible frame body.

optionally, in the preparation method of the flexible battery, the hot melting temperature of the hot melt adhesive is 190 ℃ at 170-.

In another aspect, embodiments of the present invention provide a flexible battery including:

A flexible wrapping film comprising a first flexible film layer and a second flexible film layer, an inner surface edge of the first flexible film layer being sealed against an inner surface edge of the second flexible film layer;

The flexible frame body is arranged on the periphery of the pole group fixing area on the inner surface of the first flexible film layer assembly;

The body part of the battery pole group is wrapped between the inner surface of the first flexible film layer and the inner surface of the second flexible film layer of the flexible wrapping film, is arranged in the flexible frame body, is limited in the fixing area by the flexible frame body, and the electric connection terminal part of the battery pole group extends out of the flexible wrapping film.

The purpose of the embodiments of the present invention and the technical problems solved thereby can be further realized by the following technical measures.

Optionally, in the flexible battery, the flexible frame body is surrounded by a plurality of sections of rubber frames at the periphery of the pole group fixing region.

Optionally, in the flexible battery, a first space is formed between the multiple sections of the rubber frames, and the electric connection terminal portion penetrates through the flexible wrapping film through the first space.

Optionally, in the flexible battery, a second gap is formed between the multiple sections of the rubber frames.

Optionally, in the flexible battery, the flexible wrapping film has a preset folding line, and the second interval is distributed on the preset folding line.

Optionally, in the flexible battery, the flexible wrapping film wraps the periphery of the flexible frame.

Optionally, in the flexible battery, the first flexible film layer or the second flexible film layer includes an outer layer, a core layer and an inner layer, the core layer is a polyimide film, and the inner layer is a polypropylene film.

By the technical scheme, the flexible battery and the preparation method thereof provided by the technical scheme of the invention at least have the following advantages:

in the technical scheme provided by the embodiment of the invention, the film layer wrapping the battery pole group adopts the flexible wrapping film, and compared with the prior art, the flexible wrapping film is adopted for the battery pole group, and the battery pole group is positioned by the flexible frame body arranged on the inner surface of the first flexible film layer in the flexible wrapping film, so that the flexible battery can be prepared, and the requirement of the flexible battery of the flexible electronic equipment can be met.

the foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the embodiments of the present invention more clear and clear, and to implement the technical solutions according to the contents of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

Fig. 1 is a schematic structural view of a flexible wrapping film of a flexible battery according to an embodiment of the present invention after being unfolded;

FIG. 2 is a schematic cross-sectional view A-A of FIG. 1;

FIG. 3 is a schematic cross-sectional view of B-B of FIG. 1;

Fig. 4 is a solid diagram of a cross-sectional structure of a flexible battery provided in an embodiment of the invention.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the purpose of the predetermined embodiments of the invention, the following detailed description is provided for the flexible battery and the preparation method thereof, the specific implementation manner, the structure, the features and the effects thereof according to the embodiments of the present invention with reference to the accompanying drawings and the preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

an embodiment of a method for manufacturing a flexible battery according to the present invention provides a method for manufacturing a flexible battery, including:

Arranging a flexible frame body on the periphery of the pole group fixing area on the inner surface of the first flexible film layer;

The battery pole group comprises a body part and an electric connection terminal part, the electric connection terminal part is used as a power supply output end of the body part, a battery tab is usually a battery tab, and the battery tab comprises a positive tab and a negative tab.

Disposing a body portion of a battery pole group within the flexible frame;

The inner surface of a second flexible film layer is opposite to the inner surface of the first flexible film layer, a flexible wrapping film is formed through sealing, the flexible wrapping film wraps the body part of the battery pole group between the inner surface of the first flexible film layer and the inner surface of the second flexible film layer, and the electric connection terminal part of the battery pole group extends out of the flexible wrapping film.

in the technical scheme provided by the embodiment of the invention, the film layer wrapping the battery pole group adopts the flexible wrapping film, and compared with the prior art, the flexible wrapping film is adopted for the battery pole group, and the battery pole group is positioned by the flexible frame body arranged on the inner surface of the first flexible film layer in the flexible wrapping film, so that the flexible battery can be prepared, and the requirement of the flexible battery of the flexible electronic equipment can be met.

The first flexible film layer and the second flexible film layer can be two independent film layers, and the outer edge of the inner surface of the first flexible film layer and the outer edge of the inner surface of the second flexible film layer are sealed through hot melting to form the flexible wrapping film. In practice, the embodiment of the present invention is not limited to this, and the first flexible film layer and the second flexible film layer may be an integrated film layer, the integrated film layer is folded to form the first flexible film layer and the second flexible film layer, and the outer edge of the inner surface of the first flexible film layer and the outer edge of the inner surface of the second flexible film layer are sealed by hot melting to form the flexible wrapping film.

the first flexible film layer can comprise an outer layer, a core layer and an inner layer, and the outer layer, the core layer and the inner layer are sequentially overlapped to form the first flexible film layer. The outer layer is a poly terephthalic acid plastic film, the core layer is a polyimide film, and the inner layer is a polypropylene film. Similarly, the second flexible film layer may include an outer layer, a core layer, and an inner layer, which are sequentially stacked to form the second flexible film layer. The outer layer is a poly terephthalic acid plastic film, the core layer is a polyimide film, and the inner layer is a polypropylene film. It will be readily understood that the materials of the outer, core and inner layers are not limited to the above-described embodiments, and other flexible materials may be used instead.

Compared with the aluminum shell in the prior art, the flexible wrapping film is adopted, the groove for fixing the battery pole group cannot be formed in the inner wall of the flexible wrapping film, the flexible frame body for fixing the battery pole group is arranged on the periphery of the pole group fixing area on the inner surface of the first flexible film layer, and the battery pole group can be embedded into the flexible frame body, so that the battery pole group is fixed. Taking the three-layer flexible film layer as an example, wherein the inner layer is a polypropylene film, the surface of the inner layer is smooth, the thickness of the inner layer is small, the flexible frame body formed by sticking the rubber frame body with glue is poor in overall firmness and easy to fall off. In an embodiment of the present invention, in the method for manufacturing a flexible battery, the step of disposing a flexible frame body at the periphery of the electrode group fixing region on the inner surface of the first flexible film layer may be: and hot melting hot melt adhesive is melted on the periphery of the pole group fixing area on the inner surface of the first flexible film layer to form the flexible frame body. The hot melt adhesive can be HJ23H hot melt adhesive, with a melt viscosity at 170 ℃: 4000CPs, but not limited thereto.

In a specific implementation, the hot melt adhesive is applied to the periphery of the polar group fixing region on the inner surface (polypropylene film) of the first flexible film layer by adopting the following process parameters: