CN109228575A - A kind of plastic-aluminum membrane structure - Google Patents
A kind of plastic-aluminum membrane structure Download PDFInfo
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- CN109228575A CN109228575A CN201811276918.3A CN201811276918A CN109228575A CN 109228575 A CN109228575 A CN 109228575A CN 201811276918 A CN201811276918 A CN 201811276918A CN 109228575 A CN109228575 A CN 109228575A
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- layer
- plastic
- membrane structure
- aluminum membrane
- hot sealing
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 68
- 239000012528 membrane Substances 0.000 title claims abstract description 42
- 239000010410 layer Substances 0.000 claims abstract description 146
- 238000007789 sealing Methods 0.000 claims abstract description 49
- 239000005030 aluminium foil Substances 0.000 claims abstract description 41
- 239000011241 protective layer Substances 0.000 claims abstract description 36
- 239000012790 adhesive layer Substances 0.000 claims abstract description 22
- 239000002245 particle Substances 0.000 claims abstract description 22
- 238000011049 filling Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims description 16
- 239000005025 cast polypropylene Substances 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 8
- 239000004677 Nylon Substances 0.000 claims description 7
- 229920001778 nylon Polymers 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- 229910017083 AlN Inorganic materials 0.000 claims description 3
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 claims description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 239000003822 epoxy resin Chemical class 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 239000011737 fluorine Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229920000647 polyepoxide Chemical class 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 239000009719 polyimide resin Substances 0.000 claims description 3
- 229920001228 polyisocyanate Polymers 0.000 claims description 3
- 239000005056 polyisocyanate Substances 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- 150000001336 alkenes Chemical class 0.000 claims description 2
- 229910052796 boron Inorganic materials 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 2
- 229910021529 ammonia Inorganic materials 0.000 claims 1
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 25
- 239000002985 plastic film Substances 0.000 abstract description 22
- 229920006255 plastic film Polymers 0.000 abstract description 22
- 239000003792 electrolyte Substances 0.000 abstract description 19
- 230000008569 process Effects 0.000 abstract description 13
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 12
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 12
- 239000000945 filler Substances 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 8
- 238000000354 decomposition reaction Methods 0.000 abstract description 4
- 239000004020 conductor Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 239000013032 Hydrocarbon resin Substances 0.000 description 1
- 229910001290 LiPF6 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 208000021760 high fever Diseases 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 229920006270 hydrocarbon resin Polymers 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000036413 temperature sense Effects 0.000 description 1
- MEYZYGMYMLNUHJ-UHFFFAOYSA-N tunicamycin Natural products CC(C)CCCCCCCCCC=CC(=O)NC1C(O)C(O)C(CC(O)C2OC(C(O)C2O)N3C=CC(=O)NC3=O)OC1OC4OC(CO)C(O)C(O)C4NC(=O)C MEYZYGMYMLNUHJ-UHFFFAOYSA-N 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary 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
- 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
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- 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
-
- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
-
- 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
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
-
- 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
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0261—Polyamide fibres
-
- 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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
-
- 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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/102—Oxide or hydroxide
-
- 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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/107—Ceramic
- B32B2264/108—Carbon, e.g. graphite particles
-
- 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
- B32B2307/302—Conductive
-
- 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
-
- 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)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The present invention provides a kind of plastic-aluminum membrane structure, and the plastic-aluminum membrane structure includes at least from outside to inside: protective layer, outer bound layer, aluminium foil layer, internal layer adhesive layer and hot sealing layer, wherein includes heat filling particle in the protective layer and the hot sealing layer.When generating heat in the multiple charge and discharge process of battery, heat is transferred to outside batteries from inside battery conduction by the good conductor that the high thermal conductivity filler grain in plastic-aluminum membrane structure of the present invention can be used as heat, reduce the temperature of inside battery, electrolyte decomposition generates gas when reducing battery high-temperature, bulge occurs, the risk of aluminum plastic film is packed in electrolyte accelerated corrosion, promotes the service life of lithium ion battery, stability and uses popularity.
Description
Technical field
The invention belongs to the packaging technical field of membrane of lithium ion battery, are related to a kind of plastic-aluminum membrane structure, more particularly to one
Kind high thermal conductivity and corrosion resistant plastic-aluminum membrane structure.
Background technique
As lithium ion battery is in the fast development of 3C, power and energy storage field, because of the lithium-ion electric of flexible package aluminum plastic film
It is big, light-weight, highly-safe that pond has many advantages, such as capacity, so be also increasingly taken seriously and apply, the property of natural aluminum plastic film
It can require to be also higher and higher.Currently, flexible package aluminum plastic film is generally formed by the Film laminated of three layers of different function, outer layer be by
PA layers are used as protective layer, and centre is by aluminium foil as insulating layer, and internal layer is by CPP as hot sealing layer.But researcher has found
The battery of this laminated aluminum film is also easy to produce higher heat in multiple charge and discharge process, and battery is higher using temperature, causes electricity
Pond is more prone to produce gas, and bulge occurs, and electrolyte accelerated corrosion packs aluminum plastic film, reduces the service life of lithium ion battery,
It affects the stability of lithium ion battery and uses popularity.
Therefore it provides a kind of new plastic-aluminum membrane structure is the project that those skilled in the art need to solve.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of plastic-aluminum membrane structures, for solving
Certainly high heat caused by inside is not easy the problem of exporting after the multiple charge and discharge of battery in the prior art.
In order to achieve the above objects and other related objects, the present invention provides a kind of plastic-aluminum membrane structure, the plastic-aluminum membrane structure
It includes at least from outside to inside: protective layer, outer bound layer, aluminium foil layer, internal layer adhesive layer and hot sealing layer, wherein the protection
It include heat filling particle in layer and the hot sealing layer.
As a kind of optional scheme of plastic-aluminum membrane structure of the present invention, the heat filling particle includes aluminium nitride, nitridation
One of boron, silicon carbide, aluminium oxide, magnesia, thermally conductive carbon dust and heat conductive graphite or a variety of combinations, the material of the protective layer
Material includes nylon, and the material of the hot sealing layer includes cast polypropylene, wherein the heat filling uniform particle is scattered in described
In nylon and the cast polypropylene.
As a kind of optional scheme of plastic-aluminum membrane structure of the present invention, the fusing point of the heat filling particle is between 1500 DEG C
Between~2300 DEG C.
As a kind of optional scheme of plastic-aluminum membrane structure of the present invention, the thickness of the protective layer between 10 μm~40 μm it
Between, the thermal coefficient at 23 DEG C is between 0.3W/mK~0.5W/mK.
As a kind of optional scheme of plastic-aluminum membrane structure of the present invention, the thickness of the hot sealing layer between 30 μm~80 μm it
Between, the thermal coefficient at 23 DEG C is between 0.25W/mK~0.5W/mK.
As a kind of optional scheme of plastic-aluminum membrane structure of the present invention, the aluminium foil layer surface is covered with passivating film.
As a kind of optional scheme of plastic-aluminum membrane structure of the present invention, the material of the outer bound layer include polyurethane,
One of polyisocyanate, polyimide resin, polyacrylate and organic fluorine.
As a kind of optional scheme of plastic-aluminum membrane structure of the present invention, the material of the internal layer adhesive layer includes modified polyolefin
Hydrocarbon and epoxy resin.
As a kind of optional scheme of plastic-aluminum membrane structure of the present invention, the outer bound layer and the internal layer adhesive layer
Thickness is between 3 μm~10 μm, and the thickness of the aluminium foil layer is between 20 μm~60 μm.
As a kind of optional scheme of plastic-aluminum membrane structure of the present invention, the inside of the protective layer and the outside of aluminium foil layer are logical
It is compound and be bonded as one to cross outer bound layer dry type, the outside of the inside of the aluminium foil layer and the hot sealing layer is viscous by internal layer
Knot layer dry type is compound and is bonded as one or the hot sealing layer coextrusion casting is compound and viscous in the aluminium foil layer internal layer surface thermal method
It becames one.
As described above, plastic-aluminum membrane structure of the invention, includes at least from outside to inside: protective layer, outer bound layer, aluminium foil
Layer, internal layer adhesive layer and hot sealing layer, wherein include heat filling particle in the protective layer and the hot sealing layer.This hair
The heat that bright plastic-aluminum membrane structure can enable battery generate in multiple charge and discharge process quickly exports, and effectively reduces high temperature ring
Border, which promotes the decomposition of electrolyte to generate gas, causes battery the risk of bulge, leakage occur, while being effectively reduced under hot environment
Risk of the electrolyte to plastic-aluminum erosion；In addition, since the high thermal conductivity filler grain in hot sealing layer has the fusing point of superelevation, in heat
Layer process can play a supporting role, and effectively reducing hot sealing layer superfusion rupture in heat seal process causes aluminium foil layer straight with electrolyte
The risk of battery short circuit occurs for contact, enhances processing and the corrosion resistance of aluminum plastic film, ensure that making for lithium ion battery
Use safety.
Detailed description of the invention
Fig. 1 is plastic-aluminum membrane structure diagram of the present invention.
Component label instructions
1 protective layer
2 outer bound layers
3 aluminium foil layers
4 internal layer adhesive layers
5 hot sealing layers
6,7 heat filling particle
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
Please refer to attached drawing.It should be noted that only the invention is illustrated in a schematic way for diagram provided in the present embodiment
Basic conception, only shown in schema then with related component in the present invention rather than component count, shape when according to actual implementation
Shape and size are drawn, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its component cloth
Office's kenel may also be increasingly complex.
As shown in Figure 1, the present invention provides a kind of plastic-aluminum membrane structure, the plastic-aluminum membrane structure includes at least from outside to inside: protecting
Sheath 1, outer bound layer 2, aluminium foil layer 3, internal layer adhesive layer 4 and hot sealing layer 5, wherein the protective layer 1 and the hot sealing layer
It include heat filling particle 6,7 in 5.As an example, the heat filling particle 6,7 includes aluminium nitride, boron nitride, carbonization
The material of one of silicon, aluminium oxide, magnesia, thermally conductive carbon dust and heat conductive graphite or a variety of combinations, the protective layer 1 includes
The material of nylon, the hot sealing layer 5 includes cast polypropylene, wherein the heat filling particle 6,7 is dispersed in the Buddhist nun
In imperial (PA) and the cast polypropylene (CPP), but it is not limited to this.By in 5 double-layer structure of protective layer 1 and hot sealing layer all
Evenly dispersed heat filling particle 6,7 is added, aluminum plastic film can be made to have heat-resisting high, thermally conductive uniform, mechanical strength height etc. excellent
Gesture improves the security performance of battery.
As an example, the fusing point of the heat filling particle 6,7 is between 1500 DEG C~2300 DEG C.Due to hot sealing layer 5
Contained high thermal conductivity filler grain 7 has the fusing point of superelevation, can play a supporting role in heat seal process, effectively reduce heat-sealing
The superfusion of hot sealing layer 5 rupture causes aluminium foil layer 3 directly to contact the risk that battery short circuit occurs with electrolyte in the process, enhances plastic-aluminum
The processing of film and corrosion resistance ensure that the safety in utilization of lithium ion battery.
The thickness of the protective layer 1 between 10 μm~40 μm, thermal coefficient at 23 DEG C between 0.3W/mK~
Between 0.5W/mK.
Preferably, the thickness of the protective layer 1 is between 20 μm~40 μm, the thermal coefficient at 23 DEG C is between 0.4W/
Between mK~0.5W/mK.More preferably, the thickness of the protective layer 1 can be that the thermal coefficient at 25 μm, 23 DEG C can be
0.4W/mK。
The thickness of the hot sealing layer 5 between 30 μm~80 μm, thermal coefficient at 23 DEG C between 0.25W/mK~
Between 0.5W/mK.
Preferably, the thickness of the hot sealing layer 5 is between 30 μm~50 μm, the thermal coefficient at 23 DEG C is between 0.35W/
Between mK~0.5W/mK.More preferably, the thickness of the hot sealing layer 5 can be that the thermal coefficient at 40 μm, 23 DEG C can be
0.35W/mK。
Due to including heat filling particle 6,7 in the protective layer 1 and the hot sealing layer 5 of the invention, it is described
Protective layer 1 and hot sealing layer 5 have good heating conduction, and the heat that battery can be enable to generate in multiple charge and discharge process is fast
Speed export effectively reduces hot environment and the decomposition of electrolyte is promoted to generate the risk that gas causes battery bulge, leakage occur,
And it reduces hot environment and accelerates electrolyte to the corrosion risk of packaging aluminum plastic film material.
The protective layer 1 is primarily used to that aluminium foil layer 3 is protected not to be scratched, and can operate continuously in process
Without disfeaturing, and prevent from the use process of battery carrying out as the impact concussion etc. caused by battery such as falling
Protection is internal.The hot sealing layer 5 can carry out heat-sealing bonding well with battery pole ear, improve the heat seal strength of aluminum plastic film.
The aluminium foil layer 3 is preferably by the processed aluminium foil of passivating solution, and 3 surface of aluminium foil layer is covered with after passivation
Passivating film.
As an example, the material of the outer bound layer 2 includes polyurethane, polyisocyanate, polyimide resin, poly- third
One of olefin(e) acid ester and organic fluorine.The outer bound layer 2 is for bonding the protective layer 1 and aluminium foil layer 3.
The material of the internal layer adhesive layer 4 includes improved polyalkene and epoxy resin.The internal layer adhesive layer 4 is for bonding
The hot sealing layer 5 and aluminium foil layer 3.
The thickness of the outer bound layer 2 and the internal layer adhesive layer 4 is between 3 μm~10 μm, the aluminium foil layer 3
Thickness between 20 μm~60 μm.
Preferably, the thickness of the outer bound layer 2 and the internal layer adhesive layer 4 is between 3 μm~5 μm, it is described
The thickness of aluminium foil layer 3 is between 40 μm~60 μm.More preferably, the thickness of the outer bound layer 2 and the internal layer adhesive layer 4
It can be 3 μm, the thickness of the aluminium foil layer 3 can be 40 μm.
As an example, the inside of the protective layer 1 and the outside of aluminium foil layer 3 are compound viscous by 2 dry type of outer bound layer
It becames one, the inside of the aluminium foil layer 3 and the outside of the hot sealing layer 5 are bonded as by the way that 4 dry type of internal layer adhesive layer is compound
Integrated or described 5 coextrusion casting of hot sealing layer is compound in the 3 internal layer surface thermal method of aluminium foil layer and is bonded as one.
The preparation method approximately comprises: lithium ion battery Soft Roll aluminum plastic film protective layer and hot sealing layer are in forming process
Middle addition high thermal conductivity filler pellet melting coextrusion mold, high thermal conductivity filler particle uniformly divide in protective layer and heat-sealing tunic
It dissipates, using the protective layer and hot sealing layer that are added with high thermal conductivity filler particle former and aluminium foil layer composite molding, obtains aluminum plastic film
Flexible package.When generating heat in the multiple charge and discharge process of battery, the good conductor that high thermal conductivity filler grain can be used as heat will
Heat is transferred to outside batteries from inside battery conduction, reduces the temperature of inside battery, electrolyte decomposition when reducing battery high-temperature
Gas is generated, bulge occurs, electrolyte accelerated corrosion packs the risk of aluminum plastic film, promotes the service life of lithium ion battery, surely
It is qualitative and use popularity.
Plastic-aluminum membrane structure of the invention is described further below by specific embodiment.
Embodiment one:
As shown in Figure 1, the plastic-aluminum membrane structure successively includes protecting from outside to inside the present embodiment provides a kind of plastic-aluminum membrane structure
Sheath 1, outer bound layer 2, metallic aluminium layers of foil 3, internal layer adhesive layer 4 and hot sealing layer 5, the protective layer 1 are that addition high thermal conductivity is filled out
Expect that nylon (PA) film of particle, the hot sealing layer 5 are the cast polypropylene (CPP) for adding high thermal conductivity filler grain, the aluminium
Layers of foil 3 (AL) is by the processed aluminium foil of passivating solution.The inside of protective layer 1 and the outside of aluminium foil layer 3 pass through outer bound layer 2
Dry type is combined, and the inside of aluminium foil layer 3 is combined with the outside of hot sealing layer 5 by 4 dry type of internal layer adhesive layer.Wherein, it leads
Hot filler grain 6,7 is selected as magnesia.Each thickness can be according to needs of production corresponding selection.
Embodiment two:
Embodiment two and embodiment one the difference is that: CPP hot sealing layer 5 passes through addition high thermal conductivity filler pellet melting
The inner surface heat being coextruded in aluminium foil layer 3 is combined.Thickness can be according to needs of production corresponding selection.
Comparative example one:
This comparative example provides a kind of conventional lithium-ion battery and is packed for aluminum plastic film: from outside to inside successively including protective layer, outer
Layer adhesive layer, metallic aluminium layers of foil, internal layer adhesive layer and hot sealing layer, the material of the protective layer are nylon (PA), the aluminium foil
Layer (AL) is by the processed aluminium foil of passivating solution, and the material of the hot sealing layer is cast polypropylene (CPP).The inside of protective layer
It is combined with the outside of aluminium foil layer by outer bound layer dry type, the inside of aluminium foil layer and the outside of hot sealing layer are viscous by internal layer
Knot layer dry type is combined.
Aluminum plastic film prepared by the embodiment one, two and comparative example one is subjected to heating conduction test and electrolyte resistance respectively
Performance test.
Heating conduction test: it is 80 DEG C of heat sources of fixed temperature that the aluminum plastic film, which is placed in one end, and the other end is temperature sense
The centre of probe inductor, persistently records temperature climb data.Test result is as shown in table 1.
Electrolyte resistance test: the aluminum plastic film is respectively placed in the electrolyte of EC:DEC:DMC+LiPF6=1:1:1+1Mol
In, it is impregnated under the conditions of 85 DEG C for 24 hours, takes out sample and carry out electrolyte resistance appearance and thermal conductivity test, visual examination result such as 2 institute of table
Show, the heating conduction test result after electrolyte resistance is as shown in table 3.
Table 1
| 5s | 10s | 15s | 20s | 25s | 30s | |
| Embodiment one | 35℃ | 45℃ | 48℃ | 54℃ | 55℃ | 55℃ |
| Embodiment two | 37℃ | 49℃ | 51℃ | 53℃ | 54℃ | 54℃ |
| Comparative example one | 30℃ | 35℃ | 39℃ | 42℃ | 47℃ | 49℃ |
Table 2
Table 3
| 5s | 10s | 15s | 20s | 25s | 30s | |
| Embodiment one | 38℃ | 46℃ | 50℃ | 55℃ | 55℃ | 54℃ |
| Embodiment two | 39℃ | 49℃ | 52℃ | 55℃ | 54℃ | 54℃ |
| Comparative example one | 29℃ | 33℃ | 37℃ | 44℃ | 48℃ | 50℃ |
Table 1 shows: the present invention prepares aluminum plastic film with high thermal conductivity, 2 times of aluminum plastic film thermal conductivity about common, thermal method effect
Fruit is more excellent.
Table 2 shows: the present invention prepares aluminum plastic film addition high fever conductive fillers particle and keeps stablizing to electrolyte, electrolyte resistance
Property it is synchronous.
Table 3 shows: the present invention prepares aluminum plastic film and remains to show excellent heating conduction after electrolyte immersion, thermally conductive
Ability will not decline, and be further ensured that battery in the security performance of use process.
In conclusion the present invention provides a kind of plastic-aluminum membrane structure, the plastic-aluminum membrane structure includes at least from outside to inside:
Protective layer, outer bound layer, aluminium foil layer, internal layer adhesive layer and hot sealing layer, wherein in the protective layer and the hot sealing layer
Include heat filling particle.Aluminum plastic film of the invention has compared with high thermal conductivity energy, thickness is controllable, more corrosion resistant new feature,
Effectively increase prospect of the application of the aluminum plastic film flexible package in lithium ion battery.
So the present invention effectively overcomes various shortcoming in the prior art and has high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (10)
1. a kind of plastic-aluminum membrane structure, which is characterized in that the plastic-aluminum membrane structure includes at least from outside to inside: protective layer, outer layer are viscous
Tie layer, aluminium foil layer, internal layer adhesive layer and hot sealing layer, wherein include heat filling in the protective layer and the hot sealing layer
Particle.
2. plastic-aluminum membrane structure according to claim 1, it is characterised in that: the heat filling particle includes aluminium nitride, nitrogen
Change one of boron, silicon carbide, aluminium oxide, magnesia, thermally conductive carbon dust and heat conductive graphite or a variety of combinations, the protective layer
Material includes nylon, and the material of the hot sealing layer includes cast polypropylene, wherein the heat filling uniform particle is scattered in institute
It states in nylon and the cast polypropylene.
3. plastic-aluminum membrane structure according to claim 1, it is characterised in that: the fusing point of the heat filling particle is between 1500
DEG C~2300 DEG C between.
4. plastic-aluminum membrane structure according to claim 1, it is characterised in that: the thickness of the protective layer is between 10 μm~40 μm
Between, the thermal coefficient at 23 DEG C is between 0.3W/mK~0.5W/mK.
5. plastic-aluminum membrane structure according to claim 1, it is characterised in that: the thickness of the hot sealing layer is between 30 μm~80 μm
Between, the thermal coefficient at 23 DEG C is between 0.25W/mK~0.5W/mK.
6. plastic-aluminum membrane structure according to claim 1, it is characterised in that: the aluminium foil layer surface is covered with passivating film.
7. plastic-aluminum membrane structure according to claim 1, it is characterised in that: the material of the outer bound layer includes poly- ammonia
One of ester, polyisocyanate, polyimide resin, polyacrylate and organic fluorine.
8. plastic-aluminum membrane structure according to claim 1, it is characterised in that: the material of the internal layer adhesive layer includes modified poly-
Alkene and epoxy resin.
9. plastic-aluminum membrane structure according to claim 1, it is characterised in that: the outer bound layer and the internal layer adhesive layer
Thickness between 3 μm~10 μm, the thickness of the aluminium foil layer is between 20 μm~60 μm.
10. plastic-aluminum membrane structure according to claim 1, it is characterised in that: the inside of the protective layer and aluminium foil layer it is outer
Side is bonded as one by the way that outer bound layer dry type is compound, and the outside of the inside of the aluminium foil layer and the hot sealing layer passes through interior
Layer adhesive layer dry type is compound and is bonded as one or the hot sealing layer coextrusion casting is compound in the aluminium foil layer internal layer surface thermal method
And it is bonded as one.
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| CN114074455A (en) * | 2020-08-13 | 2022-02-22 | 苏州融达信新材料科技有限公司 | Aluminum-plastic composite film with high water resistance and preparation method thereof |
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| CN113524846A (en) * | 2021-06-22 | 2021-10-22 | 万向一二三股份公司 | Composite aluminum-plastic film and manufacturing method thereof |
| CN114006092A (en) * | 2021-11-01 | 2022-02-01 | 远景动力技术(江苏)有限公司 | Secondary battery aluminum-plastic film and secondary battery |
| CN115020878A (en) * | 2022-06-07 | 2022-09-06 | 江苏锦尚新材料有限公司 | Lithium battery aluminum plastic film with moisture absorbing and removing function |
| CN115195234A (en) * | 2022-06-27 | 2022-10-18 | 浙江海顺新能源材料有限公司 | High-barrier aluminum-foil-free soft package lithium battery packaging film and preparation method thereof |
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