WO2008078948A1 - Pouch for packing cell and method for preparing the same - Google Patents
Pouch for packing cell and method for preparing the same Download PDFInfo
- Publication number
- WO2008078948A1 WO2008078948A1 PCT/KR2007/006805 KR2007006805W WO2008078948A1 WO 2008078948 A1 WO2008078948 A1 WO 2008078948A1 KR 2007006805 W KR2007006805 W KR 2007006805W WO 2008078948 A1 WO2008078948 A1 WO 2008078948A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- packing
- adhesive resin
- film
- cell
- Prior art date
Links
- 238000012856 packing Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title abstract description 14
- 230000004888 barrier function Effects 0.000 claims abstract description 56
- 239000000565 sealant Substances 0.000 claims abstract description 45
- 239000010410 layer Substances 0.000 claims description 184
- 229920000098 polyolefin Polymers 0.000 claims description 38
- 229910052782 aluminium Inorganic materials 0.000 claims description 37
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 31
- 239000004840 adhesive resin Substances 0.000 claims description 30
- 229920006223 adhesive resin Polymers 0.000 claims description 30
- 238000000151 deposition Methods 0.000 claims description 30
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 29
- 230000008021 deposition Effects 0.000 claims description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 229920006267 polyester film Polymers 0.000 claims description 21
- 239000002253 acid Substances 0.000 claims description 19
- JOYRKODLDBILNP-UHFFFAOYSA-N urethane group Chemical group NC(=O)OCC JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 18
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 16
- 229920005989 resin Polymers 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 16
- 229910052742 iron Inorganic materials 0.000 claims description 14
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims description 12
- 239000011888 foil Substances 0.000 claims description 11
- 239000012943 hotmelt Substances 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 229910052709 silver Inorganic materials 0.000 claims description 8
- 229910052718 tin Inorganic materials 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 239000002356 single layer Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 239000012748 slip agent Substances 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 claims description 2
- 238000005234 chemical deposition Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000007733 ion plating Methods 0.000 claims description 2
- 238000005289 physical deposition Methods 0.000 claims description 2
- 238000004544 sputter deposition Methods 0.000 claims description 2
- 239000003381 stabilizer Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 8
- 230000008018 melting Effects 0.000 claims 1
- 238000002844 melting Methods 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 abstract description 49
- 230000035515 penetration Effects 0.000 abstract description 33
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 19
- 239000001301 oxygen Substances 0.000 abstract description 19
- 229910052760 oxygen Inorganic materials 0.000 abstract description 19
- 238000005260 corrosion Methods 0.000 abstract description 13
- 230000007797 corrosion Effects 0.000 abstract description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052744 lithium Inorganic materials 0.000 abstract description 7
- 238000003860 storage Methods 0.000 abstract description 7
- 238000003475 lamination Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 22
- 230000000052 comparative effect Effects 0.000 description 22
- 239000012790 adhesive layer Substances 0.000 description 15
- 230000032798 delamination Effects 0.000 description 15
- 238000012360 testing method Methods 0.000 description 15
- 238000011156 evaluation Methods 0.000 description 14
- 239000004743 Polypropylene Substances 0.000 description 13
- -1 polypropylene Polymers 0.000 description 12
- 238000005336 cracking Methods 0.000 description 11
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 description 10
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 10
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 10
- 230000002087 whitening effect Effects 0.000 description 10
- 229920000139 polyethylene terephthalate Polymers 0.000 description 9
- 239000005020 polyethylene terephthalate Substances 0.000 description 9
- 150000003839 salts Chemical class 0.000 description 8
- 229920001155 polypropylene Polymers 0.000 description 7
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 6
- 239000004677 Nylon Substances 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 229920001778 nylon Polymers 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 229920006284 nylon film Polymers 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000009474 hot melt extrusion Methods 0.000 description 2
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 2
- 150000002484 inorganic compounds Chemical class 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010186 staining Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910013872 LiPF Inorganic materials 0.000 description 1
- 101150058243 Lipf gene Proteins 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- KYTZHLUVELPASH-UHFFFAOYSA-N naphthalene-1,2-dicarboxylic acid Chemical compound C1=CC=CC2=C(C(O)=O)C(C(=O)O)=CC=C21 KYTZHLUVELPASH-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- ULWHHBHJGPPBCO-UHFFFAOYSA-N propane-1,1-diol Chemical compound CCC(O)O ULWHHBHJGPPBCO-UHFFFAOYSA-N 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 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
- 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
- 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
- B32B15/085—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
- B32B15/09—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 polyesters
-
- 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
- B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
-
- 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
-
- 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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
-
- 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
- B32B2255/205—Metallic 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
- B32B2553/00—Packaging equipment or accessories not otherwise provided for
Definitions
- the present invention relates to a pouch for packing a cell such as a lithium secondary cell, a portable storage battery, etc. and a method for preparing the same.
- Korean Patent Application No. 2003-7002427 discloses a cell pouch comprising a base layer, an adhesive layer, a barrier layer, a dry laminate layer and a sealant layer, wherein the sealant layer comprises a low-fluidity polypropylene layer and a high-fluidity polypropylene layer.
- Korean Patent Publication No. 2002-0030737 discloses a cell pouch prepared by laminating a surface protective layer comprising biaxially oriented nylon, polyethylene terephthalate (PET) and polyolefin on a base film. It further mentions coating a fluorine -based, silicon-based or acryl-based resin on the base film.
- the conventional cell pouches including the aforesaid ones have the following problems.
- the continued stress from the electrolyte results in reduced adhesion strength and insulation resistance between the film layers.
- the hydrofluoric acid generated by the hydrolysis of the lithium salt by water leads to the corrosion of the metal surface, thereby resulting in peeling at the contact surface.
- An object of the present invention is to provide a pouch for packing a cell such as a lithium secondary cell, a portable storage battery, etc. with drastically improved electrolyte resistance, which is particularly required for a cell pouch, thereby capable of preventing the corrosion of the barrier layer by the electrolyte and preventing de- lamination of the sealant layer from the barrier layer, and a method for preparing the same.
- Another object of the present invention is to provide a pouch for packing a cell capable of protecting the cell safely, being shaped freely, having superior barrier property, moldability, impact resistance, air(oxygen) penetration resistance, moisture permeation resistance and piercing strength, reducing manufacturing time, improving process efficiency, reducing cost and being lightweight, and a method for preparing the same.
- the present invention provides a packing material for packing a cell comprising an outermost film; a first adhesive resin layer formed on the outermost film; a barrier layer formed on the first adhesive resin layer; a second adhesive resin layer formed on the barrier layer; and a sealant layer formed on the second adhesive resin layer, wherein the sealant layer comprises a single-layer or multi-layer polyolefin film on which a deposition layer comprising at least one of an oxide selected from SiO and Al O or a metal selected from Cu, Fe, Sn, Zn, Ag and Al is formed.
- the present invention provides a packing material for packing a cell wherein the outermost film is a polyester film comprising 100 to 110 parts by mol of an acid component to 130 parts by mol of a glycol component .
- the deposition layer has a thickness ranging from 200 to 500A.
- the polyolefin film is a three-layer polyolefin film and the polyolefins of the two neighboring layers of the three-layer polyolefin film have different crystallinity.
- the barrier layer is made of an aluminum foil, and non-chromate based anticorrosive layers are formed on both sides of the aluminum foil.
- the pouch for packing a cell such as a lithium secondary cell or a portable storage battery according to the present invention has drastically improved electrolyte resistance, which is particularly required for a cell pouch, and, therefore, is capable of preventing the corrosion of the barrier layer by the electrolyte and preventing de- lamination of the sealant layer from the barrier layer. Further, the pouch for packing a cell according to the present invention it is capable of protecting the cell safely, is shaped freely, has superior barrier property, moldability, impact resistance, air(oxygen) penetration resistance, moisture permeation resistance and piercing strength, reduces manufacturing time, improves process efficiency, reduces cost, and is lightweight.
- FIG. 1 schematically illustrates the film layer construction of a packing material for packing a cell according to an embodiment of the present invention.
- a deposition layer comprising at least one of an oxide selected from SiO and Al O or a metal selected from Cu, Fe, Sn, Zn, Ag and Al (or a combination of the oxides or metals) is formed on a sealant layer.
- This provides electrolyte resistance, thereby preventing the penetration of the electrolyte into the barrier layer for a long period of time and preventing the corrosion of the surface of the aluminum barrier layer by hydrogen fluoride generated from the reaction of the electrolyte with moisture.
- it prevents delamination of the sealant layer from the barrier layer.
- the present invention provides a pouch for packing a cell which can be shaped freely, has superior barrier property, moldability, impact resistance, electrolyte resistance, air(oxygen) penetration resistance, moisture permeation resistance, and piercing strength.
- FIG. 1 schematically illustrates the film layer construction of a packing material for packing a cell according to an embodiment of the present invention.
- the packing material for packing a cell comprises an outermost film 10, a first adhesive resin layer 20, a barrier layer 30, a second adhesive resin layer 40 and a sealant layer 50, laminated in that order.
- the polyester film is a polyester film comprising 100 to 110 parts by mol of an acid component to 130 parts by mol of a glycol component.
- a polyester film having aforesaid glycol-to-acid molar proportion has superior moldability, moisture permeation resistance, impact resistance, air(oxygen) penetration resistance, piercing strength and electrolyte resistance, and, thus, is particularly suitable for the outermost film of a cell pouch.
- the glycol component of the film may be propanediol, for example, and the acid component may be dimethyl terephthalate, terephthalic acid, naphthalene di- carboxylate, isophthalic acid, adipic acid, etc., for example.
- the polyester film may comprise an additive such as a catalyst, a slip agent, a stabilizer, etc., in a normally added amount.
- the slip agent improves slip property and, thereby, reduces friction coefficient during molding. Therefore, moldability is improved, and the cracking of aluminum, which may occur when the friction coefficient is large, can be prevented.
- the film has a thickness in the range from 12 to 100 D, and is corona- treated on the inside or on both sides in order to enhance adhesion strength.
- Such constructed film satisfies all the requirements of a nylon film or a PET film.
- it improves electrolyte resistance, thereby protecting the barrier layer 30 from the electrolyte.
- it enhances piercing strength, thereby improving resistance to piercing from outside, and provides superior moisture permeation resistance, and air (oxygen) penetration resistance.
- the barrier layer 30 blocks the penetration of moisture, gas, oxygen, etc. into the cell, and may be formed of a film on which a metal such as soft aluminum, nickel, etc. or an inorganic compound such as silicon oxide, alumina, etc. is deposited.
- a soft aluminum foil is preferred since superior tensile strength and elongation can be attained.
- the aluminum foil comprises iron.
- the presence of iron provides good insulating property, reduces pinhole occurrence when the laminate is folded, and, makes it easy to form side walls particularly when molding an emboss type housing.
- the iron content is less than 0.6 weight %, the effect of preventing the occurrence of pinholes and the effect of improving emboss moldability cannot be attained.
- the iron content of the aluminum exceeds 2.0 weight %, the flexibility as the aluminum is hindered and the processability of the laminate for pouch making is deteriorated.
- the aluminum comprises silicon. When the silicon content exceeds 0.9 weight %, the processability of the laminate for pouch making is deteriorated, although the magnetic properties are improved. On the other and, when the silicon content is less than 0.05 weight %, the processability of the laminate for pouch making is deteriorated because of reduced strength and elongation.
- the aluminum foil comprises silicon (Si) and iron
- the aluminum foil is non-chromated in order to prevent corrosion and improve adhesion strength.
- the non-chromate treatment is performed by forming an acid-resistant film using at least one organic compound, inorganic compound or a combination thereof selected from the group consisting of titanium resin, zirconium and phosphate. More preferably, the non-chromate treatment is performed on both sides of the aluminum foil, form the viewpoint of improving salt resistance.
- the outermost film 10 and the barrier layer 30 are adhered by the first adhesive resin layer 20 (Sl).
- an adhesive comprising epoxy based, phenol based, melamine based, polyimide based, polyester based, urethane based, polyethylene-terephthalate copolymer or polyether-urethane based resin is used. Excessive heat may be generated inside the packaged cell during transfer. In this case, an adhesive with poor heat resistance may result in the separation from the adherend layer. Thus, it is particularly preferable to use a urethane based adhesive having improved heat resistance.
- the sealant layer 50 comprises a single-layer or multi-layer polyolefin film on which a deposition layer comprising at least one of an oxide selected from SiO and Al O or a metal selected from Cu, Fe, Sn, Zn, Ag and Al is formed, in order to provide superior barrier property, prevent delamination from the barrier layer, provide excellent electrolyte resistance, and prevent corrosion of the surface of the aluminum by hydrogen fluoride generated from the reaction of the electrolyte with moisture.
- an oxide selected from SiO and Al O or a metal selected from Cu, Fe, Sn, Zn, Ag and Al is directly deposited on the sealant layer, and no additional barrier layer is formed. Accordingly, superior barrier property can be attained, and penetration of the electrolyte can be prevented because of superior electrolyte resistance. Further, the delamination of the barrier layer from the sealant layer, which is caused by the penetration of the electrolyte, can be prevented more effectively.
- the direct deposition of the oxide or metal on the polyolefin film of the sealant layer according to the present invention is also advantageous from the viewpoints of process efficiency and cost reduction.
- the direct deposition on the polyolefin film of the sealant layer further provides the advantage that the oxide or metal can be distributed uniformly and the distribution thereof can be controlled very easily.
- the deposition is carried out by physical deposition, chemical deposition, resistance heating deposition, plasma deposition, ion plating or sputtering.
- the deposition thickness is from 200 to 500A. When the thickness is less than 200A, the uniformity of deposition is not good. On the other hand, when the thickness exceeds 500A, moldability may be deteriorated and cracking may occur.
- a three-layer polyolefin film is particularly preferable.
- the polyolefin film may be formed of 4 or more layers, but a three-layer polyolefin film is the most preferable, from the viewpoints of process efficiency and cost.
- the poly olefins of the two neighboring layers have different crystallinity.
- a polyolefin film does not have a gas barrier property of 100 %, the electrolyte may penetrate the film, thereby resulting in decreased adhesion strength between the barrier layer and the sealant layer.
- polyolefins with different crystallinity are used. As a result, even if the electrolyte penetrates the first layer, the possibility of penetration through the second layer is decreased because the polyolefin comprising the second layer has a different crystallinity from that of the first layer. The possibility may further decrease at the third layer the polyolefin comprising the same having a different crystallinity from that of the second layer.
- the presence of the PE layer with a different crystallinity from that of the PP layer decreases the possibility of penetration of the electrolyte, as compared to a three-layer film constructed as PP/ PP/PP.
- the sealant layer 50 has a film thickness in the range from 5 to 120 D.
- a hot-melt resin layer prepared by hot-melt extrusion coating a (modified) polypropylene or (modified) polyethylene resin may be used to provide adhesion force.
- the hot-melt resin layer has a coating thickness in the range from 10 to 80 D, more preferably in the range from 10 to 40 D.
- the coating surface of the hot-melt resin may be optionally peroxidized by ozone radiation in order to improve adhesion force and improve barrier property and sealing property through formation of an ozone film.
- Test 1 Evaluation of electrolyte resistance, thermal adhesion strength, moldabilitv and delamination of packing material comprising deposited sealant layer
- Comparative Example 1 Biaxially oriented polyester film comprising 100 parts by mol of terephthalic acid as an acid component to 130 parts by mol of 1,3-propanediol as a glycol component / urethane adhesive layer / barrier layer (Al) / non-chromate based anticorrosive layer comprising titanium resin / polypropylene hot-melt resin layer / polypropylene (or polyethylene) sealant layer
- Comparative Example 2 Biaxially oriented polyester film comprising 100 parts by mol of terephthalic acid as an acid component to 130 parts by mol of 1,3-propanediol as a glycol component / urethane adhesive layer / barrier layer (Al) / non-chromate based anticorrosive layer comprising titanium resin / urethane based adhesive layer / polypropylene (or polyethylene) sealant layer
- Electrolyte resistance, thermal adhesion strength, moldability and de- lamination were evaluated as follows.
- a pouch sealed on three sides was prepared.
- the electrolyte was mixed with a red ink for easier observation.
- the electrolyte solution was filled in the pouch, and the remaining side was sealed. After keeping the pouch in vacuum for 5 minutes, the three molding parts and the sealing surface of the pouch were cut, and it was observed whether the red electrolyte solution had penetrated into the aluminum.
- 100 samples were prepared for each of Examples 1 and 2 and Comparative Example 1 to 3. Evaluation standard was as follows: "O”: no penetration was observed in any of the samples; " ⁇ ”: penetration was observed in 1 to 5 samples; "x”: penetration was observed in 6 or more samples.
- Test 2 Evaluation of electrolyte resistance, moldabilitv. moisture permeation resistance, impact resistance, airfoxygen) penetration resistance and piercing strength with different outermost films
- Example 2 The same as Example 1, except for using a biaxially oriented polyester film comprising 110 parts by mol of terephthalic acid as an acid component to 130 parts by mol of 1,3-propanediol as a glycol component as the outermost film.
- Comparative Example 1 The same as Example 1, except for using a nylon film as the outermost film.
- Comparative Example 2 The same as Example 1, except for using a composite film comprising nylon and PET laminated therebelow as the outermost film.
- Comparative Example 3 The same as Example 1, except for using a composite film comprising PET and nylon laminated therebelow as the outermost film.
- Comparative Example 4 The same as Example 1, except for using a biaxially oriented polyester film comprising 113 parts by mol of terephthalic acid as an acid component to 130 parts by mol of 1,3-propanediol as a glycol component as the outermost film.
- Comparative Example 5 The same as Example 1, except for using a biaxially oriented polyester film comprising 98 parts by mol of terephthalic acid as an acid component to 130 parts by mol of 1,3-propanediol as a glycol component as the outermost film.
- Electrolyte resistance, moldability, moisture permeation resistance, air (oxygen) penetration resistance and piercing strength were evaluated as follows.
- a forced tension during pouch molding may result in elongation and crystallization of the polymer film along with cracking, thereby leading to formation of white powder (whitening).
- the outermost layer may have insufficient barrier property and cannot function properly.
- the internal environment of a cell is an inert, or unreactive, gas atmosphere.
- reactive gas e.g. oxygen
- an unwanted reaction may occur. Penetration of oxygen was measured to determine air(oxygen) penetration resistance.
- Comparative Example 2 The same as Comparative Example 1, except for titanium non-chromate treatment on one side of the aluminum layer.
- Example The same as Comparative Example 1, except for titanium non-chromate treatment on both sides of the aluminum layer.
- Salt resistance test
- the pouch for packing a cell such as a lithium secondary cell or a portable storage battery according to the present invention has drastically improved electrolyte resistance, which is particularly required for a cell pouch, and, therefore, is capable of preventing the corrosion of the barrier layer by the electrolyte and preventing de- lamination of the sealant layer from the barrier layer. Further, the pouch for packing a cell according to the present invention it is capable of protecting the cell safely, is shaped freely, has superior barrier property, moldability, impact resistance, air(oxygen) penetration resistance, moisture permeation resistance and piercing strength, reduces manufacturing time, improves process efficiency, reduces cost, and is lightweight.
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Laminated Bodies (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200780046909.9A CN101563221B (zh) | 2006-12-22 | 2007-12-24 | 用于包装电池的袋及其制备方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2006-0132955 | 2006-12-22 | ||
| KR1020060132955A KR100846296B1 (ko) | 2006-12-22 | 2006-12-22 | 셀 포장용 봉지재 및 그 제조 방법 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008078948A1 true WO2008078948A1 (en) | 2008-07-03 |
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ID=39562692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2007/006805 WO2008078948A1 (en) | 2006-12-22 | 2007-12-24 | Pouch for packing cell and method for preparing the same |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5074041B2 (zh) |
| KR (1) | KR100846296B1 (zh) |
| CN (1) | CN101563221B (zh) |
| WO (1) | WO2008078948A1 (zh) |
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| CN102017226A (zh) * | 2008-09-22 | 2011-04-13 | 松下电器产业株式会社 | 便携式电子设备 |
| CN102144316A (zh) * | 2008-09-05 | 2011-08-03 | 松下电器产业株式会社 | 电池组 |
| CN102144317A (zh) * | 2008-09-05 | 2011-08-03 | 松下电器产业株式会社 | 电池组 |
| US8895180B2 (en) | 2009-11-16 | 2014-11-25 | Samsung Sdi Co., Ltd. | Lithium polymer secondary battery with external wrapping member |
| US9159969B2 (en) | 2009-02-05 | 2015-10-13 | Samsung Sdi Co., Ltd. | Laminate strengthened battery pack and method of manufacturing the same |
| US10312480B2 (en) | 2013-06-18 | 2019-06-04 | Lg Chem, Ltd. | Cell packing material and method of manufacturing the same |
| US10403863B2 (en) | 2012-08-30 | 2019-09-03 | Lg Chem, Ltd. | Packaging for cable-type secondary battery and cable-type secondary battery comprising the same |
| US12107279B2 (en) | 2018-01-12 | 2024-10-01 | Lg Energy Solution, Ltd. | Pouch film and method for manufacturing the same |
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| WO2022082707A1 (zh) * | 2020-10-23 | 2022-04-28 | 宁德新能源科技有限公司 | 电池及电子装置 |
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| US10403863B2 (en) | 2012-08-30 | 2019-09-03 | Lg Chem, Ltd. | Packaging for cable-type secondary battery and cable-type secondary battery comprising the same |
| US10312480B2 (en) | 2013-06-18 | 2019-06-04 | Lg Chem, Ltd. | Cell packing material and method of manufacturing the same |
| US12107279B2 (en) | 2018-01-12 | 2024-10-01 | Lg Energy Solution, Ltd. | Pouch film and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101563221B (zh) | 2013-06-05 |
| JP5074041B2 (ja) | 2012-11-14 |
| KR100846296B1 (ko) | 2008-07-14 |
| CN101563221A (zh) | 2009-10-21 |
| JP2008159559A (ja) | 2008-07-10 |
| KR20080058823A (ko) | 2008-06-26 |
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