Edge sealing adhesive tape for soft package lithium battery

Abstract

The utility model relates to the technical field of adhesive tapes, in particular to an edge sealing adhesive tape for a soft package lithium battery, which comprises an adhesive tape body, the adhesive tape body comprises a base material layer, an adhesive layer and a release film, the base material layer, the adhesive layer and the release film are sequentially stacked in a layered structure from top to bottom, involutes are respectively arranged on two sides of the base material layer, two sides of the adhesive layer and two sides of the release film, the involute is composed of a plurality of strip-shaped hollow structures and is linearly arranged, the first pasting part is arranged on the outer side of the involute, the second pasting part is arranged on the inner side of the involute, the second pasting part can be separated from the first pasting part through the involute, and the edge sealing adhesive tape is not prone to corrosion and damage and has the advantages of being large in strength and not prone to being pulled, deformed and damaged. Meanwhile, when the aluminum-plastic film is removed, the second sticking part can be pulled out from the end part of the edge sealing adhesive tape, so that the second sticking part is stripped from the first sticking parts on the two sides through the involutes, and the second sticking part can be quickly separated from the joint of the aluminum-plastic film.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of adhesive tape, concretely to an edge sealing adhesive tape for soft package lithium battery. BACKGROUND

[0002] Soft package lithium battery, also known as polymer soft package lithium battery, is a rechargeable battery wrapped with aluminum plastic film and gel polymer electrolyte. This battery has been widely used in many fields due to its lightness, flexibility, high energy density, and high safety performance.

[0003] Soft package lithium battery is a liquid lithium ion battery wrapped with a layer of polymer shell. Its packaging structure adopts aluminum plastic film packaging, and the joint of the aluminum plastic film is fixed by edge sealing adhesive tape, making the soft package lithium battery have higher safety in structure.

[0004] The existing soft package lithium battery needs to be peeled off after being scrapped, but in order to improve the sealing performance of the soft package lithium battery, the edge sealing adhesive tape of the soft package lithium battery generally has strong adhesion, which is not conducive to removal. Therefore, in view of the present situation, it is urgent to develop an edge sealing adhesive tape for soft package lithium battery to meet the needs of actual use. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an edge sealing adhesive tape for soft package lithium battery to solve the problem that the existing edge sealing adhesive tape for soft package lithium battery generally has strong adhesion and is not easy to remove, which makes it impossible to peel off the aluminum plastic film of the soft package lithium battery.

[0006] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0007] An edge sealing adhesive tape for soft package lithium battery, comprising an adhesive tape body, the adhesive tape body comprises a substrate layer, an adhesive layer and a release film, the substrate layer, the adhesive layer and the release film are stacked in a layered structure from top to bottom, the two sides of the substrate layer, the adhesive layer and the release film are respectively provided with an involute, the involute is composed of a plurality of strip-shaped hollow structures and arranged linearly, the outer side of the involute is a first adhesive part, and the inner side of the involute is a second adhesive part, the second adhesive part can be separated from the first adhesive part through the involute.

[0008] In the above description, as a further scheme, a flame-retardant film, a waterproof film, a corrosion-resistant layer, a reflective film and a heat insulation film are further arranged between the substrate layer and the adhesive layer, the upper surface of the substrate layer is fixedly attached with the flame-retardant film, the upper surface of the flame-retardant film is fixedly attached with the waterproof film, the upper surface of the waterproof film is fixedly attached with the corrosion-resistant layer, the upper surface of the corrosion-resistant layer is fixedly attached with the reflective film, the lower surface of the substrate layer is fixedly attached with the heat insulation film, and the lower surface of the heat insulation film is fixedly attached with the adhesive layer.

[0009] In the above description, as a further aspect, the substrate layer is made of a PET film, and the thickness of the substrate layer is 50 μm to 120 μm.

[0010] In the above description, as a further aspect, the thickness of the flame-retardant film, the waterproof film, and the heat-insulating film is 25 μm to 30 μm.

[0011] In the above description, as a further aspect, the corrosion-resistant layer is made of a nickel-titanium alloy blended modified fluorine-containing resin, and the thickness of the corrosion-resistant layer is 10 μm to 15 μm.

[0012] In the above description, as a further aspect, the adhesive layer is made of a pressure-sensitive adhesive layer, and the thickness of the corrosion-resistant layer is 0.1 to 0.3 mm.

[0013] The utility model discloses the beneficial effect as follows:

[0014] The edge sealing adhesive tape for the soft package lithium battery can be used for fixing the junction of the aluminum plastic film, and the first adhesive part on both sides of the edge sealing adhesive tape can be used for fixing and bonding the two sides of the junction of the aluminum plastic film, so that the edge sealing adhesive tape is not easy to be corroded and damaged, has the characteristics of high strength and being not easy to be deformed and damaged by pulling, and when the aluminum plastic film is removed, the second adhesive part can be pulled out from the end of the edge sealing adhesive tape, so that the second adhesive part can be separated from the junction of the aluminum plastic film through the involute and the first adhesive part on both sides. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 The utility model discloses a kind of edge sealing adhesive tapes for soft package lithium battery, as shown in the figure, it includes adhesive tape body, substrate layer, flame-retardant film, waterproof film, corrosion-resistant layer, reflective film, heat-insulating film, adhesive layer and release film.

[0016] Fig. 2 The utility model discloses a kind of edge sealing adhesive tapes for soft package lithium battery, as shown in the figure, it includes adhesive tape body, substrate layer, flame-retardant film, waterproof film, corrosion-resistant layer, reflective film, heat-insulating film, adhesive layer and release film.

[0017] Fig. 3 The utility model discloses a kind of edge sealing adhesive tapes for soft package lithium battery, as shown in the figure, it includes adhesive tape body, substrate layer, flame-retardant film, waterproof film, corrosion-resistant layer, reflective film, heat-insulating film, adhesive layer and release film.

[0018] In the figure: 1-adhesive tape body, 2-substrate layer, 3-flame-retardant film, 4-waterproof film, 5-corrosion-resistant layer, 6-reflective film, 7-heat-insulating film, 8-adhesive layer, 9-release film, 10-soft package lithium battery, 101-involutes, 102-first adhesive part, 103-second adhesive part. DETAILED DESCRIPTION

[0019] For the convenience of those skilled in the art to understand, the following will be further described with the embodiments and the drawings, the content mentioned in the implementation is not a limitation of the utility model. The utility model is described in detail below in combination with the drawings.

[0020] Please refer to Figs. 1-3 The utility model discloses a kind of edge sealing adhesive tape for soft package lithium battery, including adhesive tape body 1, the adhesive tape body 1 includes substrate layer 2, adhesive layer 8 and release film 9, substrate layer 2, adhesive layer 8 and release film 9 are sequentially stacked from top to bottom in layer structure, substrate layer 2, adhesive layer 8 and release film 9 two sides are equipped with involute 101 respectively, involute 101 is formed by multiple strip hollow structure, and it is linear arrangement, the outside of involute 101 is first adhesive part 102, the inside of involute 101 is second adhesive part 103, second adhesive part 103 can be separated by involute 101 with first adhesive part 102.

[0021] When the aluminum-plastic film of soft package lithium battery 10 is sealed, the second adhesive part 103 of the edge sealing adhesive tape is pasted and fixed at the joint, and the first adhesive part 102 on both sides of the edge sealing adhesive tape is fixed and bonded on both sides of the joint of the aluminum-plastic film. The edge sealing adhesive tape is not easy to be corroded and damaged, has the characteristics of high strength and is not easy to be deformed and damaged by pulling. When the aluminum-plastic film is removed, the second adhesive part 103 can be pulled out at the end of the edge sealing adhesive tape, so that the second adhesive part 103 is peeled off from the first adhesive part 102 on both sides through the involute 101, and the second adhesive part 103 can be quickly separated from the joint of the aluminum-plastic film.

[0022] In the above description, as a further scheme, a flame-retardant film 3, a waterproof film 4, a corrosion-resistant layer 5, a reflective film 6, and a heat-insulating film 7 are further provided between the substrate layer 2 and the adhesive layer 8. The upper surface of the substrate layer 2 is fixedly bonded with the flame-retardant film 3. The upper surface of the flame-retardant film 3 is fixedly bonded with the waterproof film 4. The upper surface of the waterproof film 4 is fixedly bonded with the corrosion-resistant layer 5. The upper surface of the corrosion-resistant layer 5 is fixedly bonded with the reflective film 6. The lower surface of the substrate layer 2 is fixedly bonded with the heat-insulating film 7. The lower surface of the heat-insulating film 7 is fixedly bonded with the adhesive layer 8. By providing the waterproof film 4, the flame-retardant film 3, and the heat-insulating film 7, the waterproof, flame-retardant, and heat-insulating effects of the adhesive tape body 1 are improved. The adhesive tape body 1 can be used in the working environment of the soft package battery, and has high practicability.

[0023] Specifically, the substrate layer 2 is made of a PET film, the thickness of the substrate layer 2 is 50 μm-120 μm, the thickness of the flame-retardant film 3, the waterproof film 4, and the heat-insulating film 7 is 25 μm-30 μm, the corrosion-resistant layer 5 is made of a nickel-titanium alloy blended modified fluorine-containing resin, the thickness of the corrosion-resistant layer 5 is 10 μm-15 μm, the adhesive layer 8 is composed of a pressure-sensitive adhesive layer, and the thickness of the corrosion-resistant adhesive layer is 0.1-0.3 mm.

[0024] A use state of the edge sealing tape for the soft package lithium battery 10, specifically as Fig. 3 shown, the second adhesive part 103 of the edge sealing tape is used to adhere and fix the joint, and the first adhesive part 102 on both sides of the edge sealing tape is used to fix and adhere the two sides of the joint of the aluminum plastic film of the soft package lithium battery 10; when the aluminum plastic film is removed, the second adhesive part 103 can be extracted from the end of the edge sealing tape, so that the second adhesive part 103 is separated from the joint of the aluminum plastic film through the involute 101 and the first adhesive part 102 on both sides.

[0025] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application is disclosed as above in the preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the technical solution of the present application, and any simple modification, equivalent change and modification of the above embodiment within the scope of the present application are all within the scope of the present application.

Claims

1. An edge sealing tape for a pouch lithium battery, comprising a tape body, characterized in that: The adhesive tape body comprises a substrate layer, an adhesive layer and a release film, the substrate layer, the adhesive layer and the release film are stacked in a layered structure from top to bottom, both sides of the substrate layer, the adhesive layer and the release film are respectively provided with an involute, the involute is composed of a plurality of strip-shaped hollow structures and is linearly arranged, the outer side of the involute is a first adhesive part, and the inner side of the involute is a second adhesive part, and the second adhesive part can be separated from the first adhesive part through the involute.

2. The edge sealing tape for a pouch lithium battery according to claim 1, characterized in that: The substrate layer and the adhesive layer are further provided with a fire-retardant film, a waterproof film, a corrosion-resistant layer, a reflective film and a heat insulation film, the upper surface of the substrate layer is fixedly attached with the fire-retardant film, the upper surface of the fire-retardant film is fixedly attached with the waterproof film, the upper surface of the waterproof film is fixedly attached with the corrosion-resistant layer, the upper surface of the corrosion-resistant layer is fixedly attached with the reflective film, the lower surface of the substrate layer is fixedly attached with the heat insulation film, and the lower surface of the heat insulation film is fixedly attached with the adhesive layer.

3. The edge sealing tape for a pouch lithium battery according to claim 1, characterized in that: The substrate layer is made of a PET film, and the thickness of the substrate layer is 50-120 mu m.

4. The edge sealing tape for a pouch lithium battery according to claim 2, characterized in that: The thickness of the fire-retardant film, the waterproof film and the heat insulation film is 25-30 mu m.

5. The edge sealing tape for a pouch lithium battery according to claim 4, characterized in that: The thickness of the corrosion-resistant layer is 10-15 mu m.

6. The edge sealing tape for a pouch lithium battery according to claim 1, wherein: The adhesive layer is composed of a pressure-sensitive adhesive layer, and the thickness of the corrosion-resistant adhesive layer is 0.1-0.3 mm.

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