Aluminum-plastic composite film for packaging lithium battery

Abstract

The utility model relates to the technical field of aluminum-plastic films, and provides an aluminum-plastic composite film for packaging a lithium battery, which comprises a heat sealing layer and a first bonding layer, a first bonding layer is arranged on the outer wall of the heat sealing layer, and a reinforcing structure is arranged on the outer wall of the first bonding layer. The protection structure is arranged, the protruding strips are evenly fixed to the two sides of the top of the outer protection layer, then the protruding strips are arranged in the limiting grooves in the aluminum plastic film winding process, the aluminum plastic film is positioned and guided, the outer protection layer is a PET plastic layer, and therefore the aluminum plastic film is not prone to falling off due to the fact that the outer protection layer is not prone to falling off. According to the aluminum-plastic film disclosed by the invention, the aluminum-plastic film is arranged on the outermost side of the aluminum-plastic film, so that the corrosion resistance is improved, the aluminum-plastic film is prevented from being abraded on the basis of better wear resistance, and the toughness layer is a nylon layer, so that the impact resistance, puncture resistance and other properties of the aluminum-plastic film are effectively improved, and the purpose of protecting the aluminum-plastic film is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to aluminium -plastic film technical field, especially aluminium -plastic composite film for lithium battery packaging. BACKGROUND

[0002] With the development of the era, people use various portable electronic devices more and more widely, and in order to power such devices, and then for the use of lithium batteries is essential, and in order to protect the lithium battery, thus need to be coated with aluminum plastic film on its outer wall;

[0003] Therefore, the patent with publication number CN201913844U discloses an aluminum-plastic composite film, which belongs to an indoor decoration and decoration material, and is mainly used for indoor decoration and decoration. The design of the commonly used aluminum-plastic composite film is not reasonable, the layout is not scientific, and the structure is not firm, which not only shortens the service life of the aluminum-plastic composite film, but also fails to achieve the ideal decoration effect. The utility model discloses an aluminum-plastic composite film, which comprises an aluminum film, a base film and a interlayer. The interlayer is fixed on the base film, and the aluminum film is fixed on the interlayer. The shape and size of the aluminum film are matched with those of the base film. The structure design of the utility model is reasonable, the layout is scientific, the service life is long, the use range of the aluminum-plastic composite film can be effectively improved, and the ideal decoration effect can be achieved.

[0004] The aluminum-plastic film matches the shape of the aluminum film with the base film during use, thereby facilitating the improvement of the service life and use. However, the aluminum-plastic film may be pierced by sharp external objects during use, and may be disordered during winding, so that too many wrinkles are caused and the aluminum-plastic film is difficult to use. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide an aluminum-plastic composite film for lithium battery packaging, which solves the defects of insufficient strength and inconvenient winding use of the existing aluminum-plastic composite film.

[0006] In order to solve the above technical problems, the utility model provides the following technical scheme: an aluminum-plastic composite film for lithium battery packaging, which comprises a heat-sealing layer and a first adhesive layer.

[0007] A first adhesive layer is arranged on the outer wall of the heat-sealing layer, and a reinforcing structure is arranged on the outer wall of the first adhesive layer.

[0008] A second adhesive layer is arranged on the outer wall of the reinforcing structure, and a protective structure is arranged on the outer wall of the second adhesive layer.

[0009] The protection structure comprises a toughness layer, an outer protection layer, a convex strip and a limiting groove, the toughness layer is arranged on the outer wall of the second adhesive layer, the outer wall of the toughness layer is provided with the outer protection layer, both sides of the top end of the outer protection layer are fixed with the convex strip, and the bottom end of the outer protection layer is provided with the limiting groove.

[0010] Preferably, the reinforcing structure comprises an insulation layer, a reinforcing layer and a heat insulation layer, the insulation layer is arranged on the outer wall of the first adhesive layer, the outer wall of the insulation layer is provided with the reinforcing layer, and the outer wall of the reinforcing layer is provided with the heat insulation layer.

[0011] Preferably, the first adhesive layer and the second adhesive layer are both hot melt grease layers, and the heat sealing layer and the insulation layer are mutually adhered through the first adhesive layer.

[0012] Preferably, the reinforcing layer is an aluminum foil layer.

[0013] Preferably, the heat insulation layer is an aluminum hydroxide layer.

[0014] Preferably, the toughness layer and the heat insulation layer are mutually adhered through the second adhesive layer, and the toughness layer is a nylon layer.

[0015] Preferably, the outer protection layer is a PET plastic layer, and the convex strips are symmetrically distributed at the top end of the outer protection layer.

[0016] Preferably, the limiting grooves are symmetrically distributed at the bottom end of the outer protection layer.

[0017] Preferably, the convex strips are arranged in the limiting grooves, and the convex strips and the limiting grooves form a clamping structure.

[0018] The aluminum-plastic composite film for packaging lithium batteries has the advantages that:

[0019] The convex strips are arranged in the limiting grooves, and the convex strips and the limiting grooves form a clamping structure.

[0020] The reinforcing layer is an aluminum foil layer, which can form a dense oxide layer on the aluminum-plastic film, thereby effectively preventing water and air from the outside from entering the inside, thereby preventing pollution of the lithium battery, and the outer side of the heat insulation layer is an aluminum hydroxide, thereby effectively blocking the heat generated by the lithium battery, thereby achieving the purpose of strengthening the use performance of the aluminum-plastic film. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the front view three-dimensional structure schematic diagram of the utility model;

[0022] Figure 2 It is the side view cross section three-dimensional structure schematic diagram of the utility model;

[0023] Figure 3 It is the side view cross section structure schematic diagram of the utility model;

[0024] Figure 4 It is the local cross section structure schematic diagram of the utility model;

[0025] Figure 5 It is the combined three-dimensional structure schematic diagram of the utility model.

[0026] The figure mark explanation: 1, heat seal layer;2, first adhesive layer;3, reinforcing structure;301, insulation layer;302, reinforcing layer;303, heat insulation layer;4, second adhesive layer;5, protective structure;501, ductility layer;502, outer protective layer;503, convex strip;504, limiting groove. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts fall within the protection scope of the utility model.

[0028] Please refer to Figures 1-5 The utility model provides a kind of aluminium-plastic composite film for lithium battery packaging, including heat seal layer 1 and first adhesive layer 2.

[0029] As shown in Figures 1-3 The outer wall of heat seal layer 1 is provided with first adhesive layer 2, the outer wall of first adhesive layer 2 is provided with reinforcing structure 3, reinforcing structure 3 includes insulation layer 301, reinforcing layer 302 and heat insulation layer 303, insulation layer 301 is arranged on the outer wall of first adhesive layer 2, the outer wall of insulation layer 301 is provided with reinforcing layer 302, the outer wall of reinforcing layer 302 is provided with heat insulation layer 303, first adhesive layer 2 and second adhesive layer 4 are hot melt grease layer, heat seal layer 1 and insulation layer 301 are mutually adhered by first adhesive layer 2, reinforcing layer 302 is aluminium foil layer, and heat insulation layer 303 is aluminium hydroxide layer.

[0030] In order to increase the service life of lithium battery and prevent external factors from damaging it during use, it is necessary to coat the lithium battery with an aluminum plastic film for protection. In order to increase the overall strength of the aluminum plastic film, a reinforcing structure 3 is provided, and the insulating layer 301 has an insulating effect. This not only prevents external factors from affecting the lithium battery body, but also prevents harmful substances inside the lithium battery from affecting the environment when the lithium battery is damaged. The reinforcing layer 302 is an aluminum foil layer, which can form a dense oxide film to prevent oxygen and water from entering, thereby protecting the lithium battery. The lithium battery generates a large amount of heat during operation, and the heat is isolated by the heat insulation layer 303, thereby greatly increasing the practicality of the aluminum plastic film.

[0031] Referring to Figures 1-5 As shown in the reinforcing structure 3, the outer wall of the reinforcing structure 3 is provided with a second adhesive layer 4, and the outer wall of the second adhesive layer 4 is provided with a protective structure 5. The protective structure 5 includes a ductile layer 501, an outer protective layer 502, a protrusion 503, and a limiting groove 504. The ductile layer 501 is arranged on the outer wall of the second adhesive layer 4, and the outer wall of the ductile layer 501 is provided with the outer protective layer 502. The outer protective layer 502 is fixed on both sides of the top end of the outer protective layer 502, and the bottom end of the outer protective layer 502 is provided with the limiting groove 504. The ductile layer 501 and the heat insulation layer 303 are adhered to each other through the second adhesive layer 4. The ductile layer 501 is a nylon layer, the outer protective layer 502 is a PET plastic layer, the protrusions 503 are symmetrically distributed on the top end of the outer protective layer 502, the limiting grooves 504 are symmetrically distributed on the bottom end of the outer protective layer 502, the protrusions 503 are arranged in the limiting grooves 504, and the protrusions 503 and the limiting grooves 504 form a clamping structure.

[0032] Because the aluminum plastic film is thin, it may be pierced during use. The protective structure 5 increases the overall toughness of the aluminum plastic film by providing the ductile layer 501, thereby preventing sharp objects from piercing the aluminum plastic film and affecting the use effect. During use of the lithium battery, corrosive substances may be present, and the outer protective layer 502 can effectively prevent damage to the lithium battery. During winding, the protrusions 503 are located in the limiting grooves 504 to limit the displacement of the aluminum plastic film during winding, thereby greatly increasing the functionality of the aluminum plastic film.

[0033] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for part of the technical features, as long as they are within the spirit and principles of the utility model. Any modification, equivalent substitution, improvement, etc. made within the scope of the utility model shall be included in the protection scope of the utility model.

Claims

1. An aluminum-plastic composite film for lithium battery packaging, comprising a heat-sealing layer (1) and a first adhesive layer (2); Characterized in that: An outer wall of the heat-sealing layer (1) is provided with the first adhesive layer (2), and an outer wall of the first adhesive layer (2) is provided with a reinforcing structure (3); An outer wall of the reinforcing structure (3) is provided with a second adhesive layer (4), and an outer wall of the second adhesive layer (4) is provided with a protective structure (5); The protective structure (5) comprises a toughness layer (501), an outer protective layer (502), a protrusion (503), and a limiting groove (504), the toughness layer (501) is arranged on the outer wall of the second adhesive layer (4), the outer wall of the toughness layer (501) is provided with the outer protective layer (502), the outer protective layer (502) is fixed with the protrusion (503) on both sides of the top end, and the bottom end of the outer protective layer (502) is provided with the limiting groove (504).

2. The laminated aluminum film for lithium battery packaging according to claim 1, characterized in that: The reinforcing structure (3) comprises an insulating layer (301), a reinforcing layer (302), and a heat insulation layer (303), the insulating layer (301) is arranged on the outer wall of the first adhesive layer (2), the outer wall of the insulating layer (301) is provided with the reinforcing layer (302), and the outer wall of the reinforcing layer (302) is provided with the heat insulation layer (303).

3. The lithium battery packaging aluminum-plastic composite film according to claim 2, characterized in that: The first adhesive layer (2) and the second adhesive layer (4) are hot melt grease layers, and the heat-sealing layer (1) and the insulating layer (301) are adhered to each other through the first adhesive layer (2).

4. The lithium battery packaging aluminum-plastic composite film according to claim 2, characterized in that: The reinforcing layer (302) is an aluminum foil layer.

5. The lithium battery packaging aluminum-plastic composite film according to claim 2, characterized in that: The heat insulation layer (303) is an aluminum hydroxide layer.

6. The lithium battery packaging laminate film according to claim 1, characterized in that: The toughness layer (501) and the heat insulation layer (303) are adhered to each other through the second adhesive layer (4), and the toughness layer (501) is a nylon layer.

7. The laminated aluminum film for lithium battery packaging according to claim 1, characterized in that: The outer protective layer (502) is a PET plastic layer, and the protrusions (503) are symmetrically distributed on the top end of the outer protective layer (502).

8. The lithium battery packaging laminate film according to claim 1, characterized in that: The limiting grooves (504) are symmetrically distributed on the bottom end of the outer protective layer (502).

9. The laminated aluminum film for lithium battery packaging according to claim 1, characterized in that: The protrusions (503) are arranged in the limiting grooves (504), and the protrusions (503) and the limiting grooves (504) form a clamping structure.

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