CN214491963U

CN214491963U - Composite film for battery packaging

Info

Publication number: CN214491963U
Application number: CN202023213229.3U
Authority: CN
Inventors: 沈晓宇
Original assignee: Zhejiang Tony Electronic Co ltd
Current assignee: Zhejiang Tony Electronic Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-10-26
Anticipated expiration: 2030-12-28

Abstract

The composite film for packaging the battery comprises a heat sealing layer, a metal base layer, an insulating layer, a PVC heat insulation base layer, an adhesive layer and a protective layer, wherein the heat sealing layer, the metal base layer, the insulating layer, the PVC heat insulation base layer, the adhesive layer and the protective layer are sequentially laminated from inside to outside, the thickness of the metal base layer is 5 mu-40 mu m, the thickness of the heat sealing layer is 5 mu-20 mu m, and the thickness of the insulating layer is 5 mu-20 mu m. Compared with the prior art, the utility model discloses heat resistance and separation nature are stronger, and intensity compares traditional material and also can obtain promoting by a wide margin.

Description

Composite film for battery packaging

Technical Field

The utility model relates to a battery packaging material technical field, especially a complex film for battery packing.

Background

The flexible package lithium battery is a novel battery, and is favored by more and more fields due to the reasons of low cost, good plasticity and the like. Nowadays, the flexible package lithium battery is widely applied to the fields of 3C, power batteries and household appliances. The packaging material of the flexible packaging lithium battery is generally made of an aluminum-plastic/steel-plastic composite film at present, however, the packaging material of the flexible packaging lithium battery generally needs to have excellent heat sealing performance, barrier performance and other performances to meet the requirements of the lithium ion battery on the external packaging material. At present, the existing outer packaging materials can not well meet the quality requirements of the lithium ion battery on the outer packaging materials.

Disclosure of Invention

The utility model aims at providing a complex film for battery packing to solve the problem that proposes in the background art.

The technical solution of the utility model is that: a composite film for battery packaging comprises a heat sealing layer, a metal base layer, an insulating layer, a PVC heat insulation base layer, an adhesive layer and a protective layer, wherein the heat sealing layer, the metal base layer, the insulating layer, the PVC heat insulation base layer, the adhesive layer and the protective layer are sequentially laminated from inside to outside, the thickness of the metal base layer is 5 mu-40 mu m, the thickness of the heat sealing layer is 5 mu-20 mu m, the thickness of the insulating layer is 5 mu-20 mu m, and the thickness of the PVC heat insulation base layer is 5 mu-10 mu m.

Preferably, the metal base layer is a metal foil made of any one of nickel, steel, aluminum alloy, and copper.

Preferably, the heat-sealing layer is LCP.

Preferably, the insulating layer is LCP.

Preferably, the adhesive layer is acrylic adhesive.

Preferably, the adhesive layer has a thickness of 5 to 10 μm.

Preferably, the protective layer is PET.

Preferably, the thickness of the protective layer is 5 μm to 10 μm.

The utility model has the advantages that:

compared with the prior art, the utility model discloses heat resistance and separation nature are stronger, and intensity compares traditional material and also can obtain promoting by a wide margin.

Drawings

FIG. 1 is a schematic structural view of the present invention;

Detailed Description

The present invention will be further described with reference to the following embodiments in conjunction with the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

In the embodiment, as shown in fig. 1, a composite film for battery packaging comprises a heat sealing layer 1, a metal base layer 2, an insulating layer 3, a PVC heat insulation base layer 4, an adhesive layer 5 and a protective layer 6, wherein the composite film sequentially laminates the heat sealing layer 1, the metal base layer 2, the insulating layer 3, the PVC heat insulation base layer 4, the adhesive layer 5 and the protective layer 6 from inside to outside, the metal base layer 2 has a thickness of 5 μm to 40 μm, the heat sealing layer 1 has a thickness of 5 μm to 20 μm, the insulating layer 3 has a thickness of 5 μm to 20 μm, the PVC heat insulation base layer 4 has a thickness of 5 μm to 10 μm, preferably, the metal base layer 2 has a thickness of 20 μm, the heat sealing layer 1 has a thickness of 5 μm, the insulating layer 3 has a thickness of 5 μm, and the PVC heat insulation base layer 4 has a thickness of 8 μm.

Further, metal substrate 2 is the metal foil, is made by any one of nickel, steel, aluminium, aluminum alloy, copper, and this embodiment adopts the steel to implement, because of the application of steel foil material, its intensity also can obtain promoting by a wide margin compared traditional material.

Furthermore, the heat sealing layer 1 is LCP, and the heat sealing layer uses a novel engineering resin material LCP which can be subjected to heat sealing to replace the traditional CPP and PE materials, so that the heat resistance and the barrier property are improved.

Further, the insulating layer 3 is LCP, since LCP has excellent electrical insulating property. The dielectric strength is higher than that of common engineering plastics, the arc resistance is good, and the electrical property is not influenced at the continuous use temperature of 200 ℃ and 300 ℃.

Further, the adhesive layer 5 is acrylic adhesive, and the thickness of the adhesive layer 5 is 5 μm to 10 μm, preferably, the thickness of the adhesive layer 5 of this embodiment is 5 μm.

Further, the protective layer 6 is PET, the thickness of the protective layer 6 is 5 μm to 10 μm, preferably, the thickness of the protective layer 6 in this embodiment is 5 μm, the PET material has good mechanical properties and good folding endurance, and provides external protection for the battery, and prolongs the service life of the battery.

The utility model discloses a product is through the test, and its heat resistance promotes, has promoted 200 by 100 ℃, bears outside puncture ability and has promoted more than 6 times, and heat resistance and separation nature are stronger, and intensity compares traditional material and also can obtain promoting by a wide margin.

Claims

1. A composite film for battery packaging, characterized by: the composite heat-insulation PVC film comprises a heat-sealing layer (1), a metal base layer (2), an insulating layer (3), a PVC heat-insulation base layer (4), an adhesive layer (5) and a protective layer (6), wherein the composite film is sequentially laminated from inside to outside on the heat-sealing layer (1), the metal base layer (2), the insulating layer (3), the PVC heat-insulation base layer (4), the adhesive layer (5) and the protective layer (6), the thickness of the metal base layer (2) is 5 mu-40 mu m, the thickness of the heat-sealing layer (1) is 5 mu-20 mu m, the thickness of the insulating layer (3) is 5 mu-20 mu m, and the thickness of the PVC heat-insulation base layer (4) is 5 mu-10 mu m.

2. A composite film for battery packaging according to claim 1, wherein: the metal base layer (2) is a metal foil and is made of any one of nickel, steel, aluminum alloy and copper.

3. A composite film for battery packaging according to claim 1, wherein: the heat sealing layer (1) is LCP.

4. A composite film for battery packaging according to claim 1, wherein: the insulating layer (3) is LCP.

5. A composite film for battery packaging according to claim 1, wherein: the adhesive layer (5) is acrylic adhesive.

6. A composite film for battery packaging according to claim 1, wherein: the thickness of the adhesive layer (5) is 5-10 μm.

7. A composite film for battery packaging according to claim 1, wherein: the protective layer (6) is PET.

8. A composite film for battery packaging according to claim 1, wherein: the thickness of the protective layer (6) is 5-10 mu m.