CN216015518U

CN216015518U - Electrolyte corrosion resistant aluminum plastic film

Info

Publication number: CN216015518U
Application number: CN202121321960.XU
Authority: CN
Inventors: 张锋; 曾祥康
Original assignee: Huizhou Wanji New Energy Materials Co ltd
Current assignee: Huizhou Wanji New Energy Materials Co ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2022-03-11
Anticipated expiration: 2031-06-11

Abstract

The utility model discloses an electrolyte corrosion resistant aluminum-plastic film, which comprises: the packaging layer, the aluminium foil layer, nylon layer and anticorrosive coating. The packaging layer wraps the battery cell and is used for packaging the battery cell. The aluminum foil layer is arranged on the outer side of the packaging layer and used for shaping. The nylon layer is arranged on the outer side of the aluminum foil layer and used for protecting the aluminum foil layer. The anticorrosive coating sets up in the nylon layer outside for prevent electrolyte corrosion nylon layer. In this embodiment, set up the anticorrosive coating in the nylon layer outside, the plastic-aluminum membrane has had the anticorrosive function of resistant electrolyte corrosion, makes in the battery production process, even there is electrolyte to adhere on the casing is outside, can not produce corrosion phenomenon yet, has improved the yield of battery production, has reduced the pollution waste in the battery production.

Description

Electrolyte corrosion resistant aluminum plastic film

Technical Field

The utility model relates to the technical field of aluminum-plastic packaging, in particular to an electrolyte corrosion resistant aluminum-plastic film.

Background

The existing aluminum-plastic packaging composite film mostly adopts a structure that the bright surface of an aluminum foil is composite CPP (chlorinated Polypropylene), and the sub-surface of the aluminum foil is a composite nylon film, and the aluminum foil comprises a nylon layer, a nylon binder, the aluminum foil, the CPP binder and the CPP. Because the existing lithium ion batteries all need electrolyte as a conductive medium, and in the manufacturing process of the batteries, the electrolyte needs to be poured in a vacuum environment, so that the electrolyte is prevented from contacting moisture in the air to generate a chemical reaction to generate highly corrosive hydrofluoric acid; annotate the liquid under the vacuum environment, electrolyte spills the battery case very easily and adheres on the outside inferior face nylon that is of casing, because the nylon can't tolerate electrolyte and corrode, the nylon layer can produce the foaming phenomenon of whitening after the certain time to lead to the battery to scrap.

SUMMERY OF THE UTILITY MODEL

In view of the above, the utility model provides an electrolyte corrosion resistant aluminum-plastic film, which is used for solving the problem that in the prior art, when liquid is injected in a vacuum environment, electrolyte is easily splashed out of a battery shell and is adhered to the outer part of the shell, namely, a subaerial nylon, and since nylon cannot resist the corrosion of the electrolyte, a nylon layer generates a whitening and foaming phenomenon after a certain time, so that a battery is scrapped.

To achieve one or a part of or all of the above or other objects, the present invention provides an electrolyte corrosion resistant aluminum-plastic film, comprising:

the packaging layer is used for packaging the battery cell;

the aluminum foil layer is arranged on the outer side of the packaging layer and used for shaping;

the nylon layer is arranged on the outer side of the aluminum foil layer and used for protecting the aluminum foil layer;

and the anticorrosive layer is arranged on the outer side of the nylon layer and used for preventing electrolyte corrosion on the nylon layer.

In the electrolyte corrosion resistant aluminum plastic film, the anticorrosive layer is a PET film.

In the electrolyte corrosion resistant aluminum-plastic film, a first adhesive layer is arranged between the packaging layer and the aluminum foil layer and is used for bonding the CPP packaging layer and the aluminum foil together.

In the electrolyte corrosion resistant aluminum-plastic film, the first adhesive layer is an acrylic resin adhesive layer.

In the electrolyte corrosion resistant aluminum-plastic film, the first adhesive layer is uniformly arranged on the first side of the aluminum foil layer by coating.

In the electrolyte corrosion resistant aluminum-plastic film, a second adhesive layer is arranged between the aluminum foil layer and the nylon layer and is used for adhering the aluminum foil layer and the nylon layer together.

In the electrolyte corrosion resistant aluminum-plastic film, the second adhesive layer is a two-component polyurethane adhesive.

In the electrolyte corrosion resistant aluminum-plastic film, the second adhesive layer is uniformly arranged on the second side of the aluminum foil layer by coating.

In the electrolyte corrosion resistant aluminum-plastic film, passivation solution is coated on both surfaces of the aluminum foil layer.

The utility model also provides aluminum-plastic package production equipment which is used for producing the electrolyte corrosion resistant aluminum-plastic film.

Compared with the prior art, the utility model has the beneficial effects that: in the utility model, the anticorrosive layer capable of preventing the electrolyte corrosion is compounded outside the nylon layer, so that the sub-surface of the aluminum-plastic film has the function of resisting the electrolyte corrosion, and the corrosion phenomenon can not occur even if the electrolyte is adhered to the outer sub-surface of the shell in the production process of the battery, thereby improving the yield of the battery production and reducing the pollution waste in the production.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an electrolyte corrosion resistant aluminum plastic film in one embodiment.

Wherein:

11. a packaging layer; 12. an aluminum foil layer; 13. a nylon layer; 14. a first adhesive layer; 15. a second adhesive layer; 16. and (4) an anticorrosive layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

An electrolyte corrosion resistant aluminum-plastic film comprising: a packaging layer 11, an aluminum foil layer 12, a nylon layer 13 and an anticorrosive layer 16.

The encapsulation layer 11 wraps up the battery cell for encapsulating the battery cell. The aluminum foil layer 12 is disposed outside the encapsulation layer 11 for molding. Nylon layer 13 sets up in the outside of aluminium foil layer 12 for protect aluminium foil layer 12. The anti-corrosion layer 16 is arranged outside the nylon layer 13 and used for preventing the electrolyte from corroding the nylon layer 13.

In this embodiment, set up anticorrosive coating 16 outside nylon layer 13, the plastic-aluminum membrane has had the anticorrosive function of resistant electrolyte corrosion, makes in the battery production process, even there is electrolyte to adhere on the casing outside, can not produce corrosion phenomenon yet, has improved the yield of battery production, has reduced the pollution waste in the battery production.

In one embodiment, the corrosion protection layer 16 is a PET film. Because PET is a low molecular structure, can effectively block the infiltration of electrolyte, and the PET material itself has the electrolyte corrosion prevention's characteristics, so this product can effectively stop the corruption of electrolyte to the battery in the battery production manufacturing process.

In one embodiment, to bond potting layer 11 and aluminum foil layer 12 together, a first adhesive layer 14 is disposed between potting layer 11 and aluminum foil layer 12 for bonding CPP potting layer 11 and aluminum foil together. Specifically, the first adhesive layer 14 is an acrylic adhesive layer.

In one embodiment, to improve the bonding effect, the first adhesive layer 14 is uniformly disposed on the first side of the aluminum foil layer 12 by means of smearing.

In one embodiment, to bond aluminum foil layer 12 and nylon layer 13 together, a second adhesive layer 15 is disposed between aluminum foil layer 12 and nylon layer 13 for bonding aluminum foil layer 12 and nylon layer 13 together. Specifically, the second adhesive layer 15 is a two-component polyurethane adhesive.

In one embodiment, in order to improve the bonding effect, the second adhesive layer 15 is uniformly disposed on the second side of the aluminum foil layer 12 by means of smearing.

In one embodiment, aluminum foil layer 12 is coated on both sides with a passivation solution.

In one embodiment, the aluminum-plastic package production equipment is used for producing the electrolyte corrosion resistant aluminum-plastic film.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the utility model is not limited by the scope of the appended claims.

Claims

1. An electrolyte corrosion resistant aluminum-plastic film, comprising:

the packaging layer is used for packaging the battery cell;

2. The electrolyte corrosion resistant aluminum-plastic film of claim 1, wherein said corrosion resistant layer is a PET film.

3. The electrolyte corrosion resistant aluminum-plastic film of claim 1, wherein a first adhesive layer is disposed between said encapsulation layer and said aluminum foil layer for bonding the CPP encapsulation layer and the aluminum foil together.

4. The electrolyte corrosion resistant aluminum-plastic film of claim 3, wherein said first adhesive layer is an acrylic adhesive layer.

5. The electrolyte corrosion resistant aluminum-plastic film of claim 4, wherein the first adhesive layer is uniformly disposed on the first side of the aluminum foil layer by means of painting.

6. The electrolyte corrosion resistant aluminum-plastic film of any of claims 1-5, wherein a second adhesive layer is disposed between the aluminum foil layer and the nylon layer for bonding the aluminum foil layer and the nylon layer together.

7. The electrolyte corrosion resistant aluminum-plastic film of claim 6, wherein said second adhesive layer is a two-component polyurethane adhesive.

8. The electrolyte corrosion resistant aluminum-plastic film of claim 7, wherein the second adhesive layer is uniformly disposed on the second side of the aluminum foil layer by means of painting.

9. The electrolyte corrosion resistant aluminum-plastic film of claim 6, wherein the aluminum foil layer is coated on both sides with a passivation solution.