CN111251684A - Full-plastic packaging film for lithium battery - Google Patents
Full-plastic packaging film for lithium battery Download PDFInfo
- Publication number
- CN111251684A CN111251684A CN201811460536.6A CN201811460536A CN111251684A CN 111251684 A CN111251684 A CN 111251684A CN 201811460536 A CN201811460536 A CN 201811460536A CN 111251684 A CN111251684 A CN 111251684A
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- layer
- packaging film
- plastic packaging
- graphene oxide
- furan resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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Abstract
The invention discloses an all-plastic packaging film for a lithium battery, which sequentially comprises a nylon layer 1, an outer bonding layer 2, a barrier layer 3, an inner bonding layer 4 and a CPP heat sealing layer 5 from outside to inside, and is characterized in that the barrier layer 3 consists of a furan resin layer or an organic fluorine resin layer or a mixture layer of furan resin and organic fluorine resin and a graphene oxide modified polyimide layer. According to the invention, the graphene oxide modified polyimide with the surface coated with a layer of furan resin or organic fluororesin or a mixture of the furan resin and the organic fluororesin is used as the barrier layer, so that a common barrier layer aluminum foil is replaced, the barrier layer aluminum foil has an insulating property, the risk of short circuit of an aluminum plastic film after the heat seal layer is corroded can be avoided, and the safety performance of the battery is improved. Meanwhile, the graphene oxide modified polyimide layer has high strength and high barrier property and excellent flame retardance and corrosion resistance; the furan resin or the organic fluororesin or the mixture of the furan resin and the organic fluororesin further improves the corrosion resistance. In addition, the all-plastic packaging film is light in weight and easy to process.
Description
Technical Field
The invention belongs to the technical field of lithium ion battery packaging, and particularly relates to an all-plastic packaging film for a lithium battery.
Background
The aluminum plastic film is a core material of the flexible package lithium battery and plays a key role in light weight of the battery. Compared with packaging materials such as a steel shell, an aluminum shell or a plastic shell, the aluminum-plastic film has the advantages of light weight, thin thickness, flexible appearance design and the like, and is gradually becoming the mainstream of the market. At present, the most commonly used aluminum-plastic composite film is a composite material composed of an outer nylon layer (ON layer), an intermediate aluminum foil layer (AL layer) and an inner heat sealing layer (CPP or PP), and the layers are pressed and bonded through an adhesive.
The aluminum foil is probably the material with the best barrier property in the barrier materials used on the existing soft plastic package, but the composite processing property of the aluminum foil is poorer, the crease and the fracture are easy to occur, the barrier property of the aluminum foil is influenced, the packaging cost is relatively higher, and more resources are consumed. In addition, the aluminum foil has conductivity, and after the heat seal layer is corroded, a path is easily formed between the aluminum foil and the heat seal layer, so that a road is caused, and certain potential safety hazards are caused.
Therefore, there is a need to find an alternative material for aluminum foil to improve the defects of lithium ion batteries caused by the aluminum foil.
Disclosure of Invention
The invention aims to provide an all-plastic packaging film for a lithium battery, which is used for improving the safety performance of the battery and improving the strength, flame retardance and corrosion resistance of the packaging film.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a full plastic packaging film for a lithium battery comprises a nylon layer 1, an outer adhesive layer 2, a barrier layer 3, an inner adhesive layer 4 and a CPP heat sealing layer 5 from outside to inside in sequence; the barrier layer 3 is composed of a furan resin layer or an organic fluorine resin layer or a mixture layer of furan resin and organic fluorine resin and a graphene oxide modified polyimide layer, and the thickness of the barrier layer is 30-60 mu m.
The graphene oxide is a graphene oxide microchip, and the diameter-thickness ratio of the graphene oxide microchip is 300-3000.
And a furan resin layer or an organic fluorine resin layer or a mixture layer of furan resin and organic fluorine resin is coated on the graphene oxide modified polyimide layer, and the thickness of the layer is 2-5 mu m.
The outer bonding layer is a polyurethane adhesive, and the thickness of the outer bonding layer is 1-5 mu m.
The inner bonding layer is a polyolefin adhesive and has a thickness of 1-5 mu m.
The CPP heat sealing layer is a cooking-grade polypropylene film, and the thickness of the CPP heat sealing layer is 20-100 mu m.
A preparation method of an all-plastic packaging film for a lithium battery comprises the following steps:
s1: carrying out surface pretreatment on the graphene oxide modified polyimide layer to improve the surface adhesion capability of the graphene oxide modified polyimide layer, wherein the pretreatment is to carry out corona treatment and plasma cleaning on the inner layer of the barrier layer;
s2: coating a furan resin layer or an organic fluorine resin layer or a mixture layer of furan resin and organic fluorine resin on the pretreated surface of the graphene oxide modified polyimide layer in the S1;
s3: and S2, laminating, bonding and drying the barrier layer with the nylon layer and the CPP heat sealing layer respectively through an adhesive to obtain the finished product of the all-plastic packaging film.
The invention has the beneficial effects that:
according to the invention, the graphene oxide modified polyimide with the surface coated with a layer of furan resin or organic fluororesin or a mixture of the furan resin and the organic fluororesin is used as the barrier layer to replace a common barrier layer aluminum foil, so that the insulation property is achieved, the risk of short circuit caused by corrosion of the heat seal layer of the aluminum plastic film can be avoided, and the safety performance of the battery is improved. Meanwhile, the graphene oxide modified polyimide film has high strength, high barrier property, excellent flame retardance and excellent corrosion resistance; the surface is coated with a layer of furan resin to further improve the corrosion resistance, especially the hydrofluoric acid resistance. In addition, the all-plastic packaging film has the advantages of light weight, easiness in processing and the like.
Drawings
FIG. 1 is a schematic structural diagram of an all-plastic packaging film for a lithium battery according to the present invention.
In the figure 1, a 1-nylon layer, a 2-polyurethane outer adhesive layer, a 3-1-graphene oxide modified polyimide layer, a 3-2-furan resin layer or an organic fluorine resin layer or a mixture layer of furan resin and organic fluorine resin, 3-1 and 3-2 jointly form a barrier layer 3, a 4-polyolefin inner adhesive layer and a 5-CPP heat sealing layer.
Detailed Description
The present invention is described in detail below with reference to specific embodiments, and the description in this section is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
A full plastic packaging film for a lithium battery comprises a nylon layer 1, an outer adhesive layer 2, a barrier layer 3, an inner adhesive layer 4 and a CPP heat sealing layer 5 from outside to inside in sequence; the barrier layer 3 is composed of a furan resin layer or an organic fluorine resin layer or a mixture layer of furan resin and organic fluorine resin and a graphene oxide modified polyimide layer, and the thickness of the barrier layer is 30-60 mu m.
The graphene oxide is a graphene oxide microchip, and the diameter-thickness ratio of the graphene oxide microchip is 300-3000.
And a furan resin layer or an organic fluorine resin layer or a mixture layer of furan resin and organic fluorine resin is coated on the graphene oxide modified polyimide layer, and the thickness of the layer is 2-5 mu m.
The outer bonding layer is a polyurethane adhesive, and the thickness of the outer bonding layer is 1-5 mu m.
The inner bonding layer is a polyolefin adhesive and has a thickness of 1-5 mu m.
The CPP heat sealing layer is a cooking-grade polypropylene film, and the thickness of the CPP heat sealing layer is 20-100 mu m.
A preparation method of an all-plastic packaging film for a lithium battery comprises the following steps:
s1: carrying out surface pretreatment on the graphene oxide modified polyimide layer to improve the surface adhesion capability of the graphene oxide modified polyimide layer, wherein the pretreatment is to carry out corona treatment and plasma cleaning on the inner layer of the barrier layer;
s2: coating a furan resin layer or an organic fluorine resin layer or a mixture layer of furan resin and organic fluorine resin on the pretreated surface of the graphene oxide modified polyimide layer in the S1;
s3: and S2, laminating, bonding and drying the barrier layer with the nylon layer and the CPP heat sealing layer respectively through an adhesive to obtain the finished product of the all-plastic packaging film.
According to the all-plastic packaging film for the lithium battery, the furan resin layer or the graphene oxide modified polyimide layer or the mixture layer of the furan resin layer and the graphene oxide modified polyimide layer is used as the barrier layer, a common barrier layer aluminum foil is replaced, and the risk of short circuit caused by corrosion of the plastic film on the heat sealing layer is avoided.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (7)
1. The all-plastic packaging film for the lithium battery is characterized in that the blocking layer 3 consists of a furan resin layer or an organic fluorine resin layer or a mixture layer of the furan resin and the organic fluorine resin and a graphene oxide modified polyimide layer, and the thickness of the all-plastic packaging film is 30-60 mu m.
2. The all-plastic packaging film for the lithium battery as claimed in claim 1, wherein the graphene oxide is a graphene oxide micro-sheet with a diameter-thickness ratio of 300-3000.
3. The all-plastic packaging film for the lithium battery as claimed in claim 1, wherein the graphene oxide modified polyimide layer is coated with a furan resin layer or an organic fluorine resin layer or a mixture layer of furan resin and organic fluorine resin, and the thickness of the layer is 2-5 μm.
4. The all-plastic packaging film for the lithium battery as claimed in claim 1, wherein the outer adhesive layer is a polyurethane adhesive and has a thickness of 1-5 μm.
5. The all-plastic packaging film for the lithium battery as claimed in claim 1, wherein the inner adhesive layer is a polyolefin adhesive and has a thickness of 1-5 μm.
6. The all-plastic packaging film for the lithium battery as claimed in claim 1, wherein the CPP heat sealing layer is a cooking grade polypropylene film with a thickness of 20-100 μm.
7. A preparation method of an all-plastic packaging film for a lithium battery is characterized by comprising the following steps:
s1: carrying out surface pretreatment on the graphene oxide modified polyimide layer to improve the surface adhesion capability of the graphene oxide modified polyimide layer, wherein the pretreatment is to carry out corona treatment and plasma cleaning on the inner layer of the barrier layer;
s2: coating a furan resin layer or an organic fluorine resin layer or a mixture layer of furan resin and organic fluorine resin on the pretreated surface of the graphene oxide modified polyimide layer in the S1;
s3: and S2, laminating, bonding and drying the barrier layer with the nylon layer and the CPP heat sealing layer respectively through an adhesive to obtain the finished product of the all-plastic packaging film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811460536.6A CN111251684A (en) | 2018-12-01 | 2018-12-01 | Full-plastic packaging film for lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811460536.6A CN111251684A (en) | 2018-12-01 | 2018-12-01 | Full-plastic packaging film for lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111251684A true CN111251684A (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811460536.6A Pending CN111251684A (en) | 2018-12-01 | 2018-12-01 | Full-plastic packaging film for lithium battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111703141A (en) * | 2020-06-13 | 2020-09-25 | 武汉汉烯科技有限公司 | Graphene composite flexible packaging film and lithium ion battery |
| EP3812149A1 (en) * | 2019-10-23 | 2021-04-28 | Korea Aluminium Co., Ltd | Secondary batterie pouch film containing graphene |
| CN113424355A (en) * | 2020-09-25 | 2021-09-21 | 宁德新能源科技有限公司 | Packaging film and battery cell with same |
| CN114368197A (en) * | 2020-10-15 | 2022-04-19 | 深圳格林德能源集团有限公司 | Corrosion-resistant aluminum-plastic film for soft package lithium ion battery and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101992888A (en) * | 2009-08-21 | 2011-03-30 | 翁文桂 | Laminated material without metal foil for blocking package |
| CN102115566A (en) * | 2011-01-06 | 2011-07-06 | 西安理工大学 | Preparation method for graphene oxide with high barrier property and polymer nanocomposite film |
-
2018
- 2018-12-01 CN CN201811460536.6A patent/CN111251684A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101992888A (en) * | 2009-08-21 | 2011-03-30 | 翁文桂 | Laminated material without metal foil for blocking package |
| CN102115566A (en) * | 2011-01-06 | 2011-07-06 | 西安理工大学 | Preparation method for graphene oxide with high barrier property and polymer nanocomposite film |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3812149A1 (en) * | 2019-10-23 | 2021-04-28 | Korea Aluminium Co., Ltd | Secondary batterie pouch film containing graphene |
| CN111703141A (en) * | 2020-06-13 | 2020-09-25 | 武汉汉烯科技有限公司 | Graphene composite flexible packaging film and lithium ion battery |
| CN113424355A (en) * | 2020-09-25 | 2021-09-21 | 宁德新能源科技有限公司 | Packaging film and battery cell with same |
| CN113424355B (en) * | 2020-09-25 | 2024-03-19 | 宁德新能源科技有限公司 | Packaging film and battery cell with same |
| CN114368197A (en) * | 2020-10-15 | 2022-04-19 | 深圳格林德能源集团有限公司 | Corrosion-resistant aluminum-plastic film for soft package lithium ion battery and preparation method thereof |
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Application publication date: 20200609 |