An aluminum-plastic film and battery

Abstract

This utility model discloses an aluminum-plastic film and a battery, belonging to the field of battery technology. The thickness of the inner layer of the aluminum-plastic film corresponding to the top, bottom, and left and right sides of the bare battery cell is L; the thickness of the inner layer of the aluminum-plastic film corresponding to the front side of the bare battery cell is X1, where 0 mm < X1 < L; and the thickness of the inner layer of the aluminum-plastic film corresponding to the back side of the bare battery cell is X2, where 0 mm < X2 < L. By thinning the inner layer of the aluminum-plastic film corresponding to the front and back sides of the bare battery cell, this utility model allows the space in this area to be directly converted into a usable thickness space for the bare battery cell, effectively improving the battery energy density without affecting the battery packaging effect.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and in particular relates to an aluminum-plastic film and a battery. Background Technology

[0002] The aluminum-plastic film used in existing aluminum-plastic film-encapsulated batteries generally has the following structure: outer aluminum-plastic film layer - adhesive - aluminum foil layer - adhesive - inner aluminum-plastic film layer. (Reference) Figure 1 As shown, a battery typically consists of bare cells and encapsulated aluminum-plastic film components. To improve battery energy density from the perspective of aluminum-plastic film, it is generally possible to reduce the weight or thickness of the aluminum-plastic film. However, the thickness of the aluminum-plastic film cannot be too thin, otherwise the risk of battery leakage or damage to the aluminum-plastic film will increase.

[0003] In conventional aluminum-plastic film structure design, if the overall thickness of the inner layer of the aluminum-plastic film is thinned, it may affect the sealing effect of the aluminum-plastic film, and thus affect the battery sealing effect. This can easily lead to poor sealing effect, causing the battery to leak or break easily. Utility Model Content

[0004] The purpose of this invention is to provide an aluminum-plastic film and a battery to address the shortcomings of existing technologies.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0006] An aluminum-plastic film is used to cover the outside of a bare battery cell. The thickness of the inner layer of the aluminum-plastic film corresponding to the top, bottom, and left and right sides of the bare battery cell is L. The thickness of the inner layer of the aluminum-plastic film corresponding to the front side of the bare battery cell is X1, where 0 mm < X1 < L. The thickness of the inner layer of the aluminum-plastic film corresponding to the back side of the bare battery cell is X2, where 0 mm < X2 < L.

[0007] Preferably, the aluminum-plastic film includes an outer layer of aluminum-plastic film, a first adhesive layer, an aluminum foil layer, a second adhesive layer, and an inner layer of aluminum-plastic film arranged sequentially from the outside to the inside.

[0008] Preferably, the aluminum-plastic film includes an outer aluminum-plastic film layer, an aluminum foil layer, and an inner aluminum-plastic film layer arranged sequentially from the outside to the inside.

[0009] Preferably, the material of the inner layer of the aluminum-plastic film includes: polypropylene or modified polypropylene.

[0010] Preferably, the material of the aluminum foil layer includes: aluminum foil, aluminum alloy, or modified aluminum foil.

[0011] Preferably, the material of the outer layer of the aluminum-plastic film includes nylon or polyethylene terephthalate.

[0012] A battery comprising the aluminum-plastic film described in any of the preceding claims.

[0013] The aluminum-plastic film and battery provided by this utility model have the following advantages compared with the prior art:

[0014] This invention thins the inner layer of the aluminum-plastic film corresponding to the front and back of the bare battery cell, and this area can be directly converted into a usable thickness space for the bare battery cell, which can effectively improve the battery energy density without affecting the battery packaging effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This diagram shows the positional relationship between the existing aluminum-plastic film and the bare battery cell.

[0017] Figure 2 This diagram shows the positional relationship between the aluminum-plastic film and the bare battery cell of this utility model.

[0018] In the diagram: 1-bare battery cell, 2-aluminum-plastic film. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments:

[0020] Example 1

[0021] refer to Figure 2 As shown, this utility model discloses an aluminum-plastic film that covers the outside of a bare battery cell 1. The thickness of the inner layer of the aluminum-plastic film corresponding to the top, bottom, and left and right sides of the bare battery cell 1 is L. The thickness of the inner layer of the aluminum-plastic film corresponding to the front side of the bare battery cell 1 is X1, where 0 mm < X1 < L. The thickness of the inner layer of the aluminum-plastic film corresponding to the back side of the bare battery cell 1 is X2, where 0 mm < X2 < L. The range of L is 0.0100 mm (inclusive) to 0.1600 mm (inclusive).

[0022] In a preferred embodiment, the aluminum-plastic film 2 includes an outer aluminum-plastic film layer, a first adhesive layer, an aluminum foil layer, a second adhesive layer, and an inner aluminum-plastic film layer arranged sequentially from the outside to the inside.

[0023] In a preferred embodiment, the aluminum-plastic film 2 includes an outer aluminum-plastic film layer, an aluminum foil layer, and an inner aluminum-plastic film layer arranged sequentially from the outside to the inside.

[0024] In a preferred embodiment, the material of the inner layer of the aluminum-plastic film includes, but is not limited to, polypropylene, modified polypropylene, etc.

[0025] In a preferred embodiment, the material of the aluminum foil layer includes, but is not limited to, aluminum foil, aluminum alloy, modified aluminum foil, etc.

[0026] As a preferred embodiment, the material of the outer layer of the aluminum-plastic film includes, but is not limited to, nylon, polyethylene terephthalate (PET), etc.

[0027] As a preferred embodiment, the method for thinning the inner layer of the aluminum-plastic film includes, but is not limited to, laser cleaning, custom production of aluminum-plastic film, etc.

[0028] Example 2

[0029] The only difference between this embodiment and embodiment 1 is that when L is 0.0100mm, the range of X1 is 0mm (excluding) to 0.0100mm (excluding), and the range of X2 is 0mm (excluding) to 0.0100mm (excluding).

[0030] Example 3

[0031] The only difference between this embodiment and embodiment 1 is that when L is 0.0200mm, the range of X1 is 0mm (excluding) - 0.0200mm (excluding), and the range of X2 is 0mm (excluding) - 0.0200mm (excluding).

[0032] Example 4

[0033] The only difference between this embodiment and Embodiment 1 is that when L is 0.0300mm, the range of X1 is 0mm (excluding) - 0.0300mm (excluding), and the range of X2 is 0mm (excluding) - 0.0300mm (excluding).

[0034] Example 5

[0035] The only difference between this embodiment and Embodiment 1 is that when L is 0.0500mm, the range of X1 is 0mm (excluding) - 0.0500mm (excluding), and the range of X2 is 0mm (excluding) - 0.0500mm (excluding).

[0036] Example 6

[0037] The only difference between this embodiment and Embodiment 1 is that when L is 0.1000mm, the range of X1 is 0mm (excluding) - 0.1000mm (excluding), and the range of X2 is 0mm (excluding) - 0.1000mm (excluding).

[0038] Example 7

[0039] The only difference between this embodiment and Embodiment 1 is that when L is 0.1600mm, the range of X1 is 0mm (excluding) - 0.1600mm (excluding), and the range of X2 is 0mm (excluding) - 0.1600mm (excluding).

[0040] Example 8

[0041] A battery comprising the aluminum-plastic film 2 as described in any of the preceding claims.

[0042] As a preferred embodiment, the battery includes, but is not limited to, aluminum-plastic film-encapsulated batteries such as lithium-ion batteries, lithium batteries, sodium-ion batteries, semi-solid batteries, all-solid batteries, and condensed matter batteries.

[0043] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0044] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An aluminum-plastic film, used to cover the outside of a bare battery cell, characterized in that, The thickness of the inner aluminum-plastic film corresponding to the top, bottom, and left and right sides of the bare battery cell is L, the thickness of the inner aluminum-plastic film corresponding to the front side of the bare battery cell is X1, 0mm < X1 < L, and the thickness of the inner aluminum-plastic film corresponding to the back side of the bare battery cell is X2, 0mm < X2 < L.

2. The aluminum-plastic film according to claim 1, characterized in that, The aluminum-plastic film includes, from the outside to the inside, an outer layer of aluminum-plastic film, a first adhesive layer, an aluminum foil layer, a second adhesive layer, and an inner layer of aluminum-plastic film.

3. The aluminum-plastic film according to claim 1, characterized in that, The aluminum-plastic film includes an outer layer of aluminum-plastic film, an aluminum foil layer, and an inner layer of aluminum-plastic film arranged sequentially from the outside to the inside.

4. An aluminum-plastic film according to claim 2 or 3, characterized in that, The material of the inner layer of the aluminum-plastic film includes: polypropylene or modified polypropylene.

5. An aluminum-plastic film according to claim 2 or 3, characterized in that, The material of the aluminum foil layer includes: aluminum foil, aluminum alloy, or modified aluminum foil.

6. An aluminum-plastic film according to claim 2 or 3, characterized in that, The material of the outer layer of the aluminum-plastic film includes: nylon or polyethylene terephthalate.

7. A battery, characterized in that, Includes the aluminum-plastic film as described in any one of claims 1-6.

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