CN110370738A - A kind of lithium ion battery flexible packaging film - Google Patents
A kind of lithium ion battery flexible packaging film Download PDFInfo
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- CN110370738A CN110370738A CN201910574369.6A CN201910574369A CN110370738A CN 110370738 A CN110370738 A CN 110370738A CN 201910574369 A CN201910574369 A CN 201910574369A CN 110370738 A CN110370738 A CN 110370738A
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- layer
- packaging film
- metal foil
- lithium ion
- ion battery
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- 239000012785 packaging film Substances 0.000 title claims abstract description 36
- 229920006280 packaging film Polymers 0.000 title claims abstract description 36
- 238000009459 flexible packaging Methods 0.000 title claims abstract description 29
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 19
- 239000010410 layer Substances 0.000 claims abstract description 103
- 239000011888 foil Substances 0.000 claims abstract description 43
- 239000003792 electrolyte Substances 0.000 claims abstract description 31
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 239000002346 layers by function Substances 0.000 claims abstract description 25
- 239000004677 Nylon Substances 0.000 claims abstract description 22
- 229920001778 nylon Polymers 0.000 claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 239000011248 coating agent Substances 0.000 claims abstract description 18
- 238000000576 coating method Methods 0.000 claims abstract description 18
- 229910000077 silane Inorganic materials 0.000 claims abstract description 17
- 239000000853 adhesive Substances 0.000 claims abstract description 13
- 230000001070 adhesive effect Effects 0.000 claims abstract description 13
- 239000004642 Polyimide Substances 0.000 claims abstract description 10
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 10
- 229920001721 polyimide Polymers 0.000 claims abstract description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 18
- 239000010935 stainless steel Substances 0.000 claims description 18
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims 3
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims 2
- 150000001336 alkenes Chemical class 0.000 claims 1
- 238000007766 curtain coating Methods 0.000 claims 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims 1
- 235000019253 formic acid Nutrition 0.000 claims 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims 1
- 229920000139 polyethylene terephthalate Polymers 0.000 abstract description 12
- 239000005020 polyethylene terephthalate Substances 0.000 abstract description 12
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 239000011229 interlayer Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000004743 Polypropylene Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 239000005030 aluminium foil Substances 0.000 description 5
- 239000004814 polyurethane Substances 0.000 description 5
- 239000010963 304 stainless steel Substances 0.000 description 4
- 239000004952 Polyamide Substances 0.000 description 4
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229920002647 polyamide Polymers 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 229920002635 polyurethane Polymers 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 206010016766 flatulence Diseases 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000005025 cast polypropylene Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
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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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal 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
-
- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal 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
- B32B15/088—Layered products comprising a layer of metal comprising metal 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 comprising polyamides
-
- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/1245—Primary casings; Jackets or wrappings characterised by the material having a layered structure characterised by the external coating on the casing
-
- 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
- B32B2255/06—Coating on the layer surface on metal layer
-
- 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
- B32B2255/20—Inorganic coating
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
This technology method discloses a kind of lithium ion battery flexible packaging film, and the flexible packaging film includes nylon layer, metal foil layer, electrolyte resistance functional layer and hot sealing layer；The flexible packaging film stacks gradually the nylon layer, metal foil layer, electrolyte resistance functional layer and hot sealing layer from outside to inside；And it is adhered and fixed by an adhesive between each layer；The electrolyte resistance functional layer is polyethylene terephthalate (PET) or polyimides (PI)；The metal foil layer is equipped with graphene-silane coating, and the front of the metal foil layer and reverse side are designed with graphene-silane coating；Electrolyte resistance functional layer PET or PI is added in the technical program between metal foil layer and hot sealing layer, can effectively improve the generation of battery internal corrosion phenomenon；Graphene-the silane coating can improve the interlayer structure power between the nylon layer, electrolyte resistance functional layer and metal foil layer, to improve the interlayer stable composition of the flexible packaging film.
Description
Technical field
The technical program belongs to battery packaging material field, in particular to a kind of lithium ion battery flexible packaging film.
Background technique
Since high-volume etc. factors will promote requirement to lithium battery safety for consumer electronics upgrading, new-energy automobile.Currently,
Lithium battery internal corrosion phenomenon is the quality problems that it more often occurs, and battery can be such that aluminium foil layer is destroyed, make after internal corrosion occurs
At the inflatable bulge and leakage of battery, so that battery is scrapped, or even the equipment using battery can be damaged and then lead to system example
Safety problem.
The main reason for causing lithium battery internal corrosion is that PP layers of inner layer material of aluminum plastic film are destroyed, so that electrolyte is straight
It touches aluminium foil layer and causes electrochemical reaction, aluminium layer is caused constantly to be consumed.And the main reason for causing PP to be destroyed, there is two
It is a, first is that carry out battery edge sealing when, PP layer of thickness melt at high temperature under high pressure it is thinning cause electrolyte with centre aluminium layer contact；
Second is that battery is when vacuumizing, aluminum plastic film contraction leads to PP layers and aluminium foil layer is pierced by the burr on battery core surface or particle foreign matter
It wears.
Summary of the invention
The technical program provides a kind of lithium ion battery flexible packaging film, and the flexible packaging film has outstanding electrolyte resistance
Performance, heat resistance, mechanical property and high puncture-resistant intensity.
To achieve the above object, the technical program uses following technique measures.
A kind of lithium ion battery flexible packaging film, the flexible packaging film include nylon layer, metal foil layer, electrolyte resistance function
Layer and hot sealing layer；The flexible packaging film stacks gradually the nylon layer, metal foil layer, electrolyte resistance functional layer and heat from outside to inside
Sealing；And it is adhered and fixed by an adhesive between each layer；The electrolyte resistance functional layer is polyethylene terephthalate
Ester (PET) or polyimides (PI)；The metal foil layer is equipped with graphene-silane coating, and the front of the metal foil layer
And reverse side is designed with graphene-silane coating.
Further, the metal foil layer is stainless steel foil；Tradition is substituted using the big stainless steel layers of foil of hardness high rigidity
Aluminium foil layer, make it be less susceptible to be pierced through by foreign matter, have higher safety.
Further, the hot sealing layer is cast polypropylene.
Further, the nylon layer with a thickness of 15~35 μm.
Further, the metal foil layer with a thickness of 20~50 μm.
Further, the electrolyte resistance functional layer with a thickness of 10~30 μm.
Further, the hot sealing layer with a thickness of 30~90 μm.
Further, the graphene-silane coating with a thickness of 3~10 μm.
The technical program has the beneficial effect that electrolyte resistance function is added in the technical program between metal foil layer and hot sealing layer
Ergosphere, the electrolyte resistance functional layer is polyethylene terephthalate (PET) or polyimides (PI), due to PET or PI
With doing excellent electrolyte resistance performance, heat resistance, puncture-resistant intensity and mechanical property, hot sealing layer by high temperature and pressure or
Foreign matter the factors such as puncture and after being destroyed, electrolyte contacts to be electrolyte resistance functional layer, can effectively improve rotten in battery
Lose the generation of phenomenon；Graphene-the silane coating has outstanding corrosion resistance and compactness, to positive and negative the two of metal foil layer
Face progress graphene-silane coating carries out coating and its corrosion resistance and its consistency can be improved, and can improve the nylon
Interlayer structure power between layer, electrolyte resistance functional layer and metal foil layer, so that the interlayer for improving the flexible packaging film is compound steady
It is qualitative.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of lithium ion battery flexible packaging film described in embodiment 1 and embodiment 2；
Fig. 2 is the structural schematic diagram of lithium ion battery flexible packaging film described in embodiment 3.
Specific embodiment
Embodiment 1
Referring to Fig.1, a kind of lithium ion battery flexible packaging film, the flexible packaging film include nylon layer 1, stainless steel layers of foil 2,
Electrolyte resistance functional layer 3 and hot sealing layer 4；The flexible packaging film stack gradually from outside to inside the nylon layer 1, stainless steel layers of foil 2,
Electrolyte resistance functional layer 3 and hot sealing layer 4, and two surfaces of the stainless steel layers of foil 2 are each coated with graphene-silane coating 5；
And it is adhered and fixed by an adhesive between each layer；Binder used is adhesive for polyurethane；Nylon layer 1 is 15 μm of thickness
Polyamide film；Stainless steel layers of foil 2 is 40 μm of 304 stainless steel foils, graphene-silane coating 5 with a thickness of 4 μm；Resistance to electrolysis
The polyethylene terephthalate (PET) that liquid functional layer 3 is 12 μm；Hot sealing layer 4 is 40 μm of polypropylene；Adhesive layer 5 is poly-
Urethane adhesive, and with a thickness of 2 μm.
Embodiment 2
Referring to Fig.1, a kind of lithium ion battery flexible packaging film, the flexible packaging film include nylon layer 1, stainless steel layers of foil 2,
Electrolyte resistance functional layer 3 and hot sealing layer 4；The flexible packaging film stack gradually from outside to inside the nylon layer 1, stainless steel layers of foil 2,
Electrolyte resistance functional layer 3 and hot sealing layer 4, and two surfaces of the stainless steel layers of foil 2 are each coated with graphene-silane coating 5；
And it is adhered and fixed by an adhesive between each layer；Binder used is adhesive for polyurethane, with a thickness of 2 μm；Nylon layer 1 is
The polyamide film that 25 μm of thickness；Stainless steel layers of foil 2 is 40 μm of 304 stainless steel foils, graphene-silane coating 5 with a thickness of 5
μm；The polyethylene terephthalate (PET) that electrolyte resistance functional layer 3 is 12 μm；Hot sealing layer 4 is 70 μm of polypropylene.
Embodiment 3
Referring to Fig. 2, a kind of lithium ion battery flexible packaging film, the flexible packaging film include nylon layer 1, stainless steel layers of foil 2,
Electrolyte resistance functional layer 3 and hot sealing layer 4；The flexible packaging film stack gradually from outside to inside the nylon layer 1, stainless steel layers of foil 2,
Electrolyte resistance functional layer 3 and hot sealing layer 4, and two surfaces of the stainless steel layers of foil 2 are each coated with graphene-silane coating 5；
And it is adhered and fixed by an adhesive between each layer；Binder used is adhesive for polyurethane, with a thickness of 2 μm；Nylon layer 1 is
The polyamide film that 15 μm of thickness；Stainless steel layers of foil 2 is 40 μm of 304 stainless steel foils, graphene-silane coating 5 with a thickness of 6
μm；The Kapton (PI) that electrolyte resistance functional layer 3 is 20 μm；Hot sealing layer 4 is 70 μm of polypropylene.
Comparative example
Flexible packaging film in comparative example includes aluminium foil layer, nylon layer and hot sealing layer, and the flexible packaging film is from outside to inside successively
The nylon layer, stainless steel layers of foil and hot sealing layer is laminated, and is adhered and fixed by an adhesive between each layer；Nylon layer is thickness
The polyamide film of 25 μm of degree；304 stainless steel foils that stainless steel layers of foil is 40 μm；Hot sealing layer is 70 μm of polypropylene；Adhesive is
Adhesive for polyurethane, with a thickness of 2 μm.
According to the scheme of each embodiment and comparative example, after being prepared into sample, sampling carries out cell package, and every group is made battery sample
Product 200.The package temperature of top side seal is compared with ordinary temperature height, it is therefore an objective to and make hot sealing layer thinning by high-temperature fusion, it is specific to encapsulate
Technique are as follows: top side seal is hard envelope, and 230 DEG C of temperature, pressure 0.5MPa, the time 4 seconds.After battery is made, 60 DEG C are carried out 14 days
Whether burn-in test, observation battery occur burn into leakage or flatulence bulge phenomenon.The test result of each embodiment and comparative example is such as
Shown in the following table 1.
The test result of table 1 each embodiment and comparative example
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example | |
| Rate of corrosion (%) | 0 | 0 | 0 | 8 |
| Leakage rate (%) | 0 | 0 | 0 | 6 |
| Flatulence rate (%) | 0 | 0 | 0 | 12 |
The test result of each embodiment and comparative example can be seen that from table 1 increases between stainless steel foil and hot sealing layer
After electrolyte resistance functional layer, the problems such as capable of effectively improving the burn into leakage and flatulence of battery, makes battery have higher safety
Property, it is had potential application in power vehicle battery and energy-storage battery application field.
Claims (8)
1. a kind of lithium ion battery flexible packaging film, which is characterized in that the flexible packaging film includes nylon layer, metal foil layer, resistance to
Electrolyte functional layer and hot sealing layer；The flexible packaging film stacks gradually the nylon layer, metal foil layer, electrolyte resistance from outside to inside
Functional layer and hot sealing layer；And it is adhered and fixed by an adhesive between each layer；The electrolyte resistance functional layer is poly- to benzene two
Formic acid glycol ester or polyimides；The metal foil layer is equipped with graphene-silane coating, and the front of the metal foil layer
And reverse side is designed with graphene-silane coating.
2. lithium ion battery packaging film according to claim 1, which is characterized in that the metal foil layer is stainless steel
Foil.
3. lithium ion battery packaging film according to claim 1, which is characterized in that the hot sealing layer is curtain coating poly- third
Alkene.
4. lithium ion battery packaging film according to claim 1, which is characterized in that the nylon layer with a thickness of 15~
35μm。
5. lithium ion battery packaging film according to claim 1, which is characterized in that the metal foil layer with a thickness of 20
~50 μm.
6. lithium ion battery packaging film according to claim 1, which is characterized in that the thickness of the electrolyte resistance functional layer
Degree is 10~30 μm.
7. lithium ion battery packaging film according to claim 1, which is characterized in that the hot sealing layer with a thickness of 30~
90μm。
8. lithium ion battery packaging film according to claim 1, which is characterized in that the graphene-silane coating
With a thickness of 3~10 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910574369.6A CN110370738A (en) | 2019-06-28 | 2019-06-28 | A kind of lithium ion battery flexible packaging film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910574369.6A CN110370738A (en) | 2019-06-28 | 2019-06-28 | A kind of lithium ion battery flexible packaging film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110370738A true CN110370738A (en) | 2019-10-25 |
Family
ID=68251168
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910574369.6A Pending CN110370738A (en) | 2019-06-28 | 2019-06-28 | A kind of lithium ion battery flexible packaging film |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022100589A1 (en) * | 2020-11-11 | 2022-05-19 | 华为技术有限公司 | Battery packaging film, method for preparing battery packaging film, and electronic device |
| CN114552081A (en) * | 2021-12-14 | 2022-05-27 | 万向一二三股份公司 | High-safety lithium battery soft package aluminum-plastic film |
| CN115483489A (en) * | 2019-08-19 | 2022-12-16 | 上海移宇科技股份有限公司 | Battery case integrated analyte detection device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203800088U (en) * | 2013-11-27 | 2014-08-27 | 上海贯裕能源科技有限公司 | Polymer lithium ion battery package |
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| CN115483489B (en) * | 2019-08-19 | 2023-11-21 | 上海移宇科技股份有限公司 | Battery housing integrated analyte sensing device |
| WO2022100589A1 (en) * | 2020-11-11 | 2022-05-19 | 华为技术有限公司 | Battery packaging film, method for preparing battery packaging film, and electronic device |
| CN114552081A (en) * | 2021-12-14 | 2022-05-27 | 万向一二三股份公司 | High-safety lithium battery soft package aluminum-plastic film |
| CN114552081B (en) * | 2021-12-14 | 2023-08-15 | 万向一二三股份公司 | High-safety soft-package aluminum-plastic film for lithium battery |
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