CN109663728A - A kind of lithium battery encapsulation aluminum plastic film aluminium foil passivation technology - Google Patents
A kind of lithium battery encapsulation aluminum plastic film aluminium foil passivation technology Download PDFInfo
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- CN109663728A CN109663728A CN201811534430.6A CN201811534430A CN109663728A CN 109663728 A CN109663728 A CN 109663728A CN 201811534430 A CN201811534430 A CN 201811534430A CN 109663728 A CN109663728 A CN 109663728A
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- aluminium foil
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- lithium battery
- plastic film
- aluminum plastic
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- 239000005030 aluminium foil Substances 0.000 title claims abstract description 74
- 238000002161 passivation Methods 0.000 title claims abstract description 30
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 29
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 29
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 29
- 239000002985 plastic film Substances 0.000 title claims abstract description 27
- 229920006255 plastic film Polymers 0.000 title claims abstract description 27
- 238000005538 encapsulation Methods 0.000 title claims abstract description 16
- 238000005516 engineering process Methods 0.000 title claims abstract description 16
- 239000010410 layer Substances 0.000 claims abstract description 89
- 239000000243 solution Substances 0.000 claims abstract description 32
- 230000001070 adhesive effect Effects 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 239000003085 diluting agent Substances 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 7
- 238000010790 dilution Methods 0.000 claims abstract description 6
- 239000012895 dilution Substances 0.000 claims abstract description 6
- 238000010422 painting Methods 0.000 claims abstract 2
- 239000000853 adhesive Substances 0.000 claims description 18
- 239000005025 cast polypropylene Substances 0.000 claims description 9
- 238000004026 adhesive bonding Methods 0.000 claims description 7
- 229920006015 heat resistant resin Polymers 0.000 claims description 7
- 239000007800 oxidant agent Substances 0.000 claims description 7
- 230000001590 oxidative effect Effects 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 229920000098 polyolefin Polymers 0.000 claims description 5
- 239000012790 adhesive layer Substances 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 238000007766 curtain coating Methods 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- -1 polyethylene Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims 2
- 229910021529 ammonia Inorganic materials 0.000 claims 1
- 235000010985 glycerol esters of wood rosin Nutrition 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 abstract description 10
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000006731 degradation reaction Methods 0.000 abstract description 4
- 239000011229 interlayer Substances 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 229920002635 polyurethane Polymers 0.000 description 4
- 239000004814 polyurethane Substances 0.000 description 4
- HUWSZNZAROKDRZ-RRLWZMAJSA-N (3r,4r)-3-azaniumyl-5-[[(2s,3r)-1-[(2s)-2,3-dicarboxypyrrolidin-1-yl]-3-methyl-1-oxopentan-2-yl]amino]-5-oxo-4-sulfanylpentane-1-sulfonate Chemical compound OS(=O)(=O)CC[C@@H](N)[C@@H](S)C(=O)N[C@@H]([C@H](C)CC)C(=O)N1CCC(C(O)=O)[C@H]1C(O)=O HUWSZNZAROKDRZ-RRLWZMAJSA-N 0.000 description 3
- QBWKPGNFQQJGFY-QLFBSQMISA-N 3-[(1r)-1-[(2r,6s)-2,6-dimethylmorpholin-4-yl]ethyl]-n-[6-methyl-3-(1h-pyrazol-4-yl)imidazo[1,2-a]pyrazin-8-yl]-1,2-thiazol-5-amine Chemical compound N1([C@H](C)C2=NSC(NC=3C4=NC=C(N4C=C(C)N=3)C3=CNN=C3)=C2)C[C@H](C)O[C@H](C)C1 QBWKPGNFQQJGFY-QLFBSQMISA-N 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 229940125846 compound 25 Drugs 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000002845 discoloration Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910001290 LiPF6 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- 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
- B32B15/085—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 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
- 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
- B32B15/20—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
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer 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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/20—Metallic substrate based on light metals
- B05D2202/25—Metallic substrate based on light metals based on Al
-
- 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
- B32B2553/00—Packaging equipment or accessories not otherwise provided for
-
- 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)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a kind of lithium battery encapsulation aluminum plastic film aluminium foil passivation technologies, which comprises the steps of: (1) passivating solution and diluent is pressed (1~4): obtaining passivating solution finished product after (6~9) dilution proportion；(2) the passivating solution finished product that step (1) obtains is applied on aluminium foil surface in such a way that dimple roller is using inverse painting in 25~35 DEG C of environment；(3) aluminium foil that passivating solution finished product is coated in step (2) is put into 50~80 DEG C of baking ovens, which runs in drying tunnel according to 10m/min speed, keeps the tension and flatness of aluminium foil, obtains the aluminium foil containing passivation layer；The invention discloses a kind of lithium battery encapsulation aluminum plastic film, the aluminium foil with passivation layer that the aluminium foil layer is prepared by passivation technology described in any one of claim 1 to 5.The present invention solves after long-term electrolyte resistance, and the problem of adhesive property degradation or layering occur in aluminium foil layer and heat-sealing interlayer, extends soft package lithium battery service life.
Description
Technical field
The present invention relates to lithium battery packing technique fields more particularly to a kind of lithium battery encapsulation aluminum plastic film aluminium foil to be passivated work
Skill.
Background technique
Computer, communication and consumer electronics product are that the 3C electronic product of representative has driven soft package lithium battery industry
Fast development, nearly 2 years, the fast development of new-energy automobile, so that the application amount sharp increase of soft package lithium battery.With power
The application study of the fast development of automobile, soft package lithium battery various aspects becomes research hotspot.As soft package lithium battery key material
The packaging material of one of material, reaches power soft package lithium battery service life 10 years, is that current lithium battery pack package material is ground
The important topic studied carefully.
Soft package lithium battery key encapsulating material is aluminum plastic film, and structure is heat-resistant resin layer, gluing oxidant layer, aluminium foil layer, bonding
Resin layer, hot sealing layer, must heat sealability with higher, layers cementing performance, corrosion resistance and rush the extension after shell
Performance, after each layer of aluminum plastic film extends when especially rushing shell and after long-time electrolyte resistance, aluminium foil layer still needs to have with heat-sealing interlayer
Higher adhesive strength.And aluminium foil layer still needs to the electrolyte resistance and hydrofluoric acid corrosion resistance performance that have certain, it is therefore desirable to right
Aluminium foil layer surface is chemically treated, and making aluminium foil layer surface not only has good corrosion resistance, while and and bonding resin layer
Match, the adhesive strength of aluminium foil layer and hot sealing layer is kept, so chemical treatment, that is, passivation treatment technology of aluminium foil layer surface is
The key technology of aluminum plastic film.
European patent document WO2016/052294 discloses a kind of battery use packing material, but this packaging material is long-term
After electrolyte resistance, bonding force degradation between hot sealing layer and aluminium foil layer or both layering, it is difficult to meet power Soft Roll lithium electricity
The requirement in pond.
Summary of the invention
In order to solve above-mentioned aluminium foil layer while having long-term electrolyte resistance and hydrofluoric acid corrosive nature, hot sealing layer and aluminium
The problem of being not in adhesive property degradation or layering between layers of foil, the present invention provides a kind of lithium battery encapsulation plastic-aluminums
Film aluminium foil passivation technology.
The technical scheme of the present invention is realized as follows:
A kind of lithium battery encapsulation aluminum plastic film aluminium foil passivation technology, which comprises the steps of:
(1) passivating solution and diluent are pressed into (1~4): obtains passivating solution finished product after (6~9) dilution proportion；
(2) the passivating solution finished product that step (1) obtains is applied on aluminium foil surface by dimple roller in 25~35 DEG C of environment；
(3) aluminium foil that passivating solution finished product is coated in step (2) is put into 50~80 DEG C of baking ovens, the aluminium foil is according to 10m/min speed
Degree is run in drying tunnel, is kept the tension and flatness of aluminium foil, is obtained the aluminium foil containing passivation layer.
Passivating solution and diluent in above-mentioned steps (1) are what the prior art obtained.
Further, the coating weight of the passivating solution finished product is 3~4.5g/ ㎡, thickness < 1um after passivation layer baking.
Further, the dimple roller mesh number is set as 300~350 mesh.
Further, the aluminium foil with a thickness of 20~80um.
Further, the step (2) be coated with when passivating solution finished product be set in closed glue groove, can avoid passivating solution at
Product are contacted with air.
The present invention also provides a kind of lithium battery encapsulation aluminum plastic films, the heat-resistant resin layer including outer layer, intermediate aluminium foil
The hot sealing layer of layer and internal layer, the heat-resistant resin layer are PA plastics, and with a thickness of 15 μm~25 μm, the aluminium foil layer is by claim
The aluminium foil with passivation layer that 1 to 5 described in any item passivation technologies are prepared, the hot sealing layer are cast polypropylene (CPP
Film) or curtain coating polyethylene (CPE film), with a thickness of 30 μm~80 μm, the heat-resistant resin layer and aluminium foil layer are solid by gluing oxidant layer
Fixed connection, the aluminium foil layer are fixedly connected with hot sealing layer by bonding resin layer.
Further, the gluing oxidant layer is polyurethane adhesive, and adhesive layer thickness is 3 μm~5 μm after baking.
Further, the bonding resin layer is improved polyalkene adhesive, and adhesive layer thickness is 4 μm~7 μ after baking
m。
The beneficial effects of the present invention are:
1, passivating solution finished product is coated on aluminium foil by present invention process using dimple roll coating process, and in 50~80 DEG C of baking ovens
Drying, improves passivation technology production efficiency, improves the presentation quality and service life of aluminium foil layer；
2, passivating solution finished product is set in closed glue groove by present invention process, and passivating solution finished product is contacted with air, improves aluminium
Layers of foil electrolyte resistance and hydrofluoric acid corrosion resistance performance；
3, the passivating solution finished product that present invention process provides, improves aluminum plastic film in electrolyte resistance and hydrogen resistant fluorine by bonding resin layer
The adhesive strength of aluminium foil layer and heat-sealing interlayer after acid；
4, aluminum plastic film provided by the invention, each interlayer are crosslinked by chemical bond, and layers cementing power enhancing solves long-term resistance to electrolysis
The problem of liquid post heat-seal layer and aluminium foil layer adhesive property degradation or layering.
Specific embodiment
The present invention is further explained in the light of specific embodiments.
Embodiment one:
By existing passivating solution and diluent by passivating solution finished product is obtained after 4:9 dilution proportion, it is by mesh number in 25 DEG C of environment
Above-mentioned passivating solution finished product is applied on thick 40 μm of the aluminium foil surface of the substrate cleaned up by 300 dimple roller, will be coated with blunt
Change liquid finished product aluminium foil be put into 50 DEG C of baking ovens, which runs in drying tunnel according to 10m/min speed, keep aluminium foil tension and
Flatness obtains dry thick 0.4 μm of aluminium foil surface passivation layer；
In the compound 25 μm of PA films of the dry thick 3 μm of polyurethane adhesives of the above-mentioned aluminium foil coated on one side with passivation layer, another side coating
Dry thick 4 μm of the compound 40 μm of CPP films of improved polyalkene adhesive, obtain lithium battery and are packed for aluminum plastic film, detect after curing
Performance.
Embodiment two:
By existing passivating solution and diluent by passivating solution finished product is obtained after 2:7 dilution proportion, it is by mesh number in 30 DEG C of environment
Above-mentioned passivating solution finished product is applied on thick 40 μm of the aluminium foil surface of the substrate cleaned up by 320 dimple roller, will be coated with blunt
Change liquid finished product aluminium foil be put into 60 DEG C of baking ovens, which runs in drying tunnel according to 10m/min speed, keep aluminium foil tension and
Flatness obtains dry thick 0.2 μm of aluminium foil surface passivation layer；
In the compound 25 μm of PA films of the dry thick 4 μm of polyurethane adhesives of the above-mentioned aluminium foil coated on one side with passivation layer, another side coating
Dry thick 4 μm of the compound 40 μm of CPP films of improved polyalkene adhesive, obtain lithium battery and are packed for aluminum plastic film, detect after curing
Performance.
Embodiment three:
By existing passivating solution and diluent by passivating solution finished product is obtained after 1:6 dilution proportion, it is by mesh number in 35 DEG C of environment
Above-mentioned passivating solution finished product is applied on thick 40 μm of the aluminium foil surface of the substrate cleaned up by 350 dimple roller, will be coated with blunt
Change liquid finished product aluminium foil be put into 80 DEG C of baking ovens, which runs in drying tunnel according to 10m/min speed, keep aluminium foil tension and
Flatness obtains dry thick 0.5 μm of aluminium foil surface passivation layer；
In the compound 25 μm of PA films of the dry thick 4 μm of polyurethane adhesives of the above-mentioned aluminium foil coated on one side with passivation layer, another side coating
Dry thick 4 μm of the compound 40 μm of CPP films of improved polyalkene adhesive, obtain lithium battery and are packed for aluminum plastic film, detect after curing
Performance.
Performance test:
1) aluminium foil layer and hot sealing layer adhesive strength: finished product aluminum plastic film is cut into 15mm wide batten, aluminium foil and hot sealing layer are shelled
From test, adhesive strength detection data is recorded.
2) two envelope heat seal strength: heat seal condition: 180 DEG C, 3s, 0.4Mpa pressure.15mm wide batten is subjected to peel test,
Record adhesive strength detection data.
3) aluminium foil and hot sealing layer electrolyte resistance performance: packaging film is cut into 15mm wide batten, is placed into 85 DEG C of LiPF6 electricity
It is saved 7 days in solution liquid, peel test is carried out to aluminium foil and hot sealing layer, records adhesive strength detection data.
4) two envelope tensile test: one piece of finished product aluminum plastic film is taken, 3 ~ 6g electrolyte is injected after the heat-sealing of weight shell, is put into 85 DEG C of baking ovens
In 7 days, take out another warm and be honored as a queen and be cut into 15mm wide batten, peel test is carried out to CPP and CPP, records adhesive strength testing number
According to.
5) boiling is tested: finished product aluminum plastic film being put into 60 DEG C of water-baths boiling 24 ~ 72 hours, its PA film color is observed
Whether change.
Comparative example 1 is domestic and international prior art sample, structure are as follows: 3 μm of the 25 μm/first gluing oxidant layer of PA film/band passivation
40 μm of 5 μm/cast polypropylene of the 40 μm/second gluing oxidant layer of aluminium foil layer of layer.
Each performance test results of 1. embodiment of table and comparative example 1.
| Detection performance | Aluminium foil layer and hot sealing layer adhesive strength (N) | Heat seal strength (N) | Electrolyte resistance performance (N) | Two envelope tensile tests (N) | Boiling experiment |
| Embodiment one | 14.32 | 152.4 | 11.54 | 142.6 | 72H is without discoloration |
| Embodiment two | 15.65 | 160.1 | 12.46 | 139.5 | 72H is without discoloration |
| Embodiment three | 16.56 | 165.4 | 14.58 | 152.7 | 72H is without discoloration |
| Comparative example 1 | 13.55 | 136.7 | 9.25 | 126.8 | 72H light discolouration |
From the embodiment of the present invention one, two, three compared with comparative example 1, the detection performance of embodiment one, two, three has
Biggish promotion.
Remarks: two envelopes refer to rush shell after two layers of aluminum plastic film hot sealing layer and hot sealing layer.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of lithium battery encapsulation aluminum plastic film aluminium foil passivation technology, which comprises the steps of:
(1) passivating solution and diluent are pressed into (1~4): obtains passivating solution finished product after (6~9) dilution proportion；
(2) the passivating solution finished product for obtaining step (1) in such a way that dimple roller is using inverse painting in 25~35 DEG C of environment is coated with
Onto aluminium foil surface；
(3) aluminium foil that passivating solution finished product is coated in step (2) is put into 50~80 DEG C of baking ovens, the aluminium foil is according to 10m/min speed
Degree is run in drying tunnel, is kept the tension and flatness of aluminium foil, is obtained the aluminium foil containing passivation layer.
2. a kind of lithium battery encapsulation according to claim 1 aluminum plastic film aluminium foil passivation technology, it is characterised in that: described blunt
The coating weight for changing liquid finished product is 3~4.5g/ ㎡, thickness < 1um after passivation layer baking.
3. a kind of lithium battery encapsulation according to claim 2 aluminum plastic film aluminium foil passivation technology, it is characterised in that: described micro-
Recessed roller mesh number is set as 300~350 mesh.
4. a kind of lithium battery encapsulation according to claim 1 aluminum plastic film aluminium foil passivation technology, it is characterised in that: the aluminium
Foil with a thickness of 20~80um.
5. a kind of lithium battery encapsulation according to claim 1 aluminum plastic film aluminium foil passivation technology, it is characterised in that: the step
Suddenly passivating solution finished product is set in closed glue groove when (2) are coated with, and be can avoid passivating solution finished product and is contacted with air.
6. a kind of lithium battery encapsulation aluminum plastic film, the hot sealing layer of the heat-resistant resin layer including outer layer, intermediate aluminium foil layer and internal layer,
The heat-resistant resin layer is PA plastics, and with a thickness of 15 μm~25 μm, the aluminium foil layer is by described in any one of claim 1 to 5
The aluminium foil with passivation layer that passivation technology is prepared, the hot sealing layer is cast polypropylene or curtain coating polyethylene, with a thickness of 30 μ
M~80 μm, the heat-resistant resin layer are fixedly connected with aluminium foil layer by gluing oxidant layer, and the aluminium foil layer and hot sealing layer pass through bonding
Resin layer is fixedly connected.
7. a kind of lithium battery encapsulation aluminum plastic film according to claim 6, it is characterised in that: the gluing oxidant layer is poly- ammonia
Ester gum stick, adhesive layer thickness is 3 μm~5 μm after baking.
8. a kind of lithium battery encapsulation aluminum plastic film according to claim 6, it is characterised in that: the bonding resin layer is to change
Property polyolefin adhesive, after baking adhesive layer thickness be 4 μm~7 μm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811534430.6A CN109663728A (en) | 2018-12-14 | 2018-12-14 | A kind of lithium battery encapsulation aluminum plastic film aluminium foil passivation technology |
| PCT/CN2018/125275 WO2020118794A1 (en) | 2018-12-14 | 2018-12-29 | Aluminum plastic film for encapsulating lithium battery and aluminum foil passivating process for aluminum plastic film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811534430.6A CN109663728A (en) | 2018-12-14 | 2018-12-14 | A kind of lithium battery encapsulation aluminum plastic film aluminium foil passivation technology |
Publications (1)
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| CN110328952A (en) * | 2019-07-12 | 2019-10-15 | 惠州市广麟材耀科技有限公司 | The aluminium plastic membrane and preparation method thereof of low warpage high heat-sealing strength after a kind of scouring depth |
| CN110571365A (en) * | 2019-07-19 | 2019-12-13 | 厦门大学 | External packing material for lithium ion battery and application thereof |
| CN111341948A (en) * | 2020-03-16 | 2020-06-26 | 湖北亿纬动力有限公司 | Metal foil, preparation method thereof, battery cell packaging method and battery module |
| CN111844775A (en) * | 2020-07-17 | 2020-10-30 | 溧阳卓越新材料科技有限公司 | Curing method of aluminum plastic film |
| CN112962091A (en) * | 2021-02-03 | 2021-06-15 | 浙江华正能源材料有限公司 | Aluminum foil surface passivation treatment process and aluminum plastic film |
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| CN110571365A (en) * | 2019-07-19 | 2019-12-13 | 厦门大学 | External packing material for lithium ion battery and application thereof |
| CN111341948A (en) * | 2020-03-16 | 2020-06-26 | 湖北亿纬动力有限公司 | Metal foil, preparation method thereof, battery cell packaging method and battery module |
| CN111844775A (en) * | 2020-07-17 | 2020-10-30 | 溧阳卓越新材料科技有限公司 | Curing method of aluminum plastic film |
| CN112962091A (en) * | 2021-02-03 | 2021-06-15 | 浙江华正能源材料有限公司 | Aluminum foil surface passivation treatment process and aluminum plastic film |
| CN115678057A (en) * | 2021-07-29 | 2023-02-03 | 湖南工业大学 | Preparation method of super-hydrophobic/lipophobic aluminum foil |
| CN114345668A (en) * | 2021-12-27 | 2022-04-15 | 深圳市安博瑞新材料科技有限公司 | Surface treatment aluminum foil curing process |
| CN114798770A (en) * | 2022-02-18 | 2022-07-29 | 杭州五星铝业有限公司 | High dyne aluminum foil and preparation method and application thereof |
| CN114798770B (en) * | 2022-02-18 | 2023-05-09 | 杭州五星铝业有限公司 | High-altitude aluminum foil and preparation method and application thereof |
| CN114889248A (en) * | 2022-05-25 | 2022-08-12 | 江西省盛纬材料有限公司 | Lithium battery flexible packaging film and preparation method thereof |
| CN114889248B (en) * | 2022-05-25 | 2024-04-09 | 江西省盛纬材料有限公司 | Lithium battery flexible packaging film and preparation method thereof |
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