CN105070851A - Special high-obstruction packaging film for polymer lithium ion batteries - Google Patents
Special high-obstruction packaging film for polymer lithium ion batteries Download PDFInfo
- Publication number
- CN105070851A CN105070851A CN201510500240.2A CN201510500240A CN105070851A CN 105070851 A CN105070851 A CN 105070851A CN 201510500240 A CN201510500240 A CN 201510500240A CN 105070851 A CN105070851 A CN 105070851A
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- Prior art keywords
- layer
- polymer
- ion battery
- adhesive
- polypropylene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 37
- 229920000642 polymer Polymers 0.000 title claims abstract description 27
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title abstract description 16
- 229920006280 packaging film Polymers 0.000 title abstract description 6
- 239000012785 packaging film Substances 0.000 title abstract description 6
- 239000010410 layer Substances 0.000 claims abstract description 57
- 239000004743 Polypropylene Substances 0.000 claims abstract description 44
- 229920001155 polypropylene Polymers 0.000 claims abstract description 44
- -1 polypropylene Polymers 0.000 claims abstract description 27
- 238000004806 packaging method and process Methods 0.000 claims abstract description 17
- 239000004677 Nylon Substances 0.000 claims abstract description 13
- 229920001778 nylon Polymers 0.000 claims abstract description 13
- 239000012790 adhesive layer Substances 0.000 claims abstract description 11
- 239000004831 Hot glue Substances 0.000 claims abstract description 6
- 239000005030 aluminium foil Substances 0.000 claims description 15
- 239000000853 adhesive Substances 0.000 claims description 13
- 230000001070 adhesive effect Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- 239000004814 polyurethane Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 239000012528 membrane Substances 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 7
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 6
- 229920001684 low density polyethylene Polymers 0.000 claims description 6
- 239000004702 low-density polyethylene Substances 0.000 claims description 6
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 229920000178 Acrylic resin Polymers 0.000 claims description 3
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- 229920002160 Celluloid Polymers 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 3
- 239000002313 adhesive film Substances 0.000 claims description 3
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 3
- 239000011118 polyvinyl acetate Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 229920001862 ultra low molecular weight polyethylene Polymers 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 238000003851 corona treatment Methods 0.000 claims description 2
- 238000007731 hot pressing Methods 0.000 claims description 2
- 239000012943 hotmelt Substances 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 2
- 229910052782 aluminium Inorganic materials 0.000 abstract 2
- 239000011888 foil Substances 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 238000011161 development Methods 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910018502 Ni—H Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000007719 peel strength test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to a special high-obstruction packaging film for polymer lithium ion batteries. The special film is of a layered structure, and sequentially includes a modified polypropylene layer, an ultralow gray polypropylene layer, a hot melt adhesive film layer, an aluminum foil layer, an adhesive layer and a nylon layer from inside to outside. According to the invention, the ultralow gray polypropylene layer is added to the inner layer of the aluminum foil layer; the ultralow gray polypropylene layer is excellent in the capability of obstructing air and liquid, therefore, the special film is excellent in obstructing property; meanwhile, the special high-barrier packaging film for polymer lithium ion batteries is easy in formation, high in obstructing property, excellent in ductility and high in heat sealing property, and is suitable for packaging polymer lithium ion batteries, so as to provide safety protection for the polymer lithium ion batteries and prolong the service life of the lithium ion batteries.
Description
Technical field
The present invention relates to battery packaging material field, particularly a kind of polymer Li-ion battery packaging high-barrier dedicated film.
Background technology
1992, Sony corporation of Japan invention is negative pole with Carbon Materials, to make the lithium battery of positive pole containing the compound of lithium, in charge and discharge process, there is no lithium metal, only have lithium ion, start the lithium ion battery epoch, it has reformed the looks of mobile electron consumer products, has become the main power source of moving device.
Meanwhile, the history of combing battery development, the feature of our times battery industry development is: 1. environmental protection battery develops rapidly, as lithium ion battery, Ni-H cell etc.; 2. primary cell transforms to storage battery; 3. battery is to little, light, thin future development.In commercialization rechargeable battery, lithium ion battery due to its specific energy the highest, special polymer Li-ion battery can realize the thin type of chargeable battery.Just because of lithium ion battery volumetric specific energy and specific energy high, chargeable and pollution-free, possesses the large feature of present battery industrial development three, mass market opportunity is brought to the application of lithium ion battery, use in a large number at mobile phone and notebook computer, the market share also increases quickly.
In addition, polymer Li-ion battery in lithium ion battery, with its unique advantage in fail safe, likely progressively will substitute liquid electrolyte lithium-ion battery, become the main flow of 21 century lithium ion battery, open up the new opplication epoch of storage battery, development prospect is very optimistic.In polymer Li-ion battery application process, the stability maintaining its discharge and recharge is extremely important, wherein just removing at this, negative electrode material, outside polymer dielectric, the outer field packaging film of battery affects one of most important factor of its performance, this packaging film needs good barrier property and decay resistance, in processing encapsulation process, also need excellent heat sealability and ductility just can meet the requirement of polymer Li-ion battery to wrapping film, it is a multinomial crucial matter of science and technology of set, how to break through solution, it is the lithium battery particularly problem be extremely concerned about of polymer Li-ion battery factory and the packaging film enterprise that forms a complete production network that upgrading promotes the combination property of wrapping film.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of polymer Li-ion battery packaging high-barrier dedicated film.This dedicated film has excellent barrier property, heat sealability and ductility, can meet lithium ion battery to wrapping film material performance requirement, can be applicable to the packaging being applied to polymer Li-ion battery.
Technical scheme of the present invention is: a kind of polymer Li-ion battery packaging high-barrier dedicated film, comprise modified polypropene layer, ultra low-ash polypropylene layer, PUR rete, aluminium foil layer, adhesive layer, nylon layer, described dedicated film stacks gradually described modified polypropene layer, ultra low-ash polypropylene layer, PUR rete, aluminium foil layer, adhesive layer, nylon layer from inside to outside.
As a preferred embodiment of the present invention, the material of described modified polypropene layer is one or more combinations in polypropylene, low grey polypropylene, low density polyethylene (LDPE), ultra-low density polyethylene or ethylene-octene copolymer.
As a preferred embodiment of the present invention, in described modified polypropene layer, the polyacrylic gray scale content of low ash should be less than 100ppm.
As a preferred embodiment of the present invention, the gray scale content in described ultra low-ash polypropylene layer is lower than 10ppm, and thickness is 10-70 μm.
As a preferred embodiment of the present invention, one or more combinations in described PUR rete in the optional EVA adhesive film of hot melt adhesive film material, PA glued membrane, PES glued membrane, PO glued membrane, TPU glued membrane, PE or POE material.
As a preferred embodiment of the present invention, the solvent type adhesive of the optional butadiene-styrene rubber of adhesive, polyurethane, celluloid, polyvinyl acetate in described adhesive layer, the aqueous type adhesive of ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, one or more in the Emulsion Adhesive of vinyl acetate resin, acrylic resin.
After adopting technique scheme, the invention has the beneficial effects as follows:
First, the present invention increases one deck ultralow gray scale polypropylene layer material at aluminium foil layer internal layer, adds the barrier of this dedicated film; Secondly, the present invention adopts dry method and Re Fa complex technique production altogether, and processing is simple, and product also has excellent ductility and heat sealability.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein, 1 is modified polypropene layer; 2 is low gray scale polypropylene layer; 3 is PUR rete; 4 is aluminium foil layer; 5 is adhesive layer; 6 is nylon layer.
Embodiment
In order to make objects and advantages of the present invention clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment
As shown in Figure 1, invention increases a kind of polymer Li-ion battery packaging high-barrier dedicated film, comprise modified polypropene layer 1, low grey polypropylene layer 2, PUR rete 3, aluminium foil layer 4, adhesive layer 5, nylon layer 6; Described dedicated film is followed successively by modified polypropene layer 1, low grey polypropylene layer 2, PUR rete 3, aluminium foil layer 4, adhesive layer 5, nylon layer 6 from inside to outside.
The material of described modified polypropene layer 1 is one or more combinations in polypropylene, low grey polypropylene, low density polyethylene (LDPE), ultra-low density polyethylene or ethylene-octene copolymer.In described modified polypropene layer, the polyacrylic gray scale content of low ash should be less than 100ppm, and temperature limit is at 80 DEG C ~ 350 DEG C, and thickness is 10 ~ 100 μm.
Gray scale content in described ultra low-ash polypropylene layer 2 is lower than 10ppm, and thickness is 10-70 μm.
One or more combinations in described PUR rete 3 in the optional EVA adhesive film of hot melt adhesive film material, PA glued membrane, PES glued membrane, PO glued membrane, TPU glued membrane, PE or POE material, temperature limit is 80 DEG C ~ 300 DEG C, and thickness is 10 ~ 80 μm.
In described aluminium foil layer 4, material carries out chromaking process, and thickness is 30 ~ 60 μm.
The solvent type adhesive of the optional butadiene-styrene rubber of adhesive, polyurethane, celluloid, polyvinyl acetate in described adhesive layer 5, the aqueous type adhesive of ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, one or more in the Emulsion Adhesive of vinyl acetate resin, acrylic resin.
Described nylon layer 6 thickness is 10 ~ 50 μm.
Prepare a method for polymer Li-ion battery packaging high-barrier dedicated film, comprise the following steps:
1) carry out plasma corona treatment to modified polypropene one side, nylon one side and ultra low-ash polypropylene are two-sided, carry out chromaking process to aluminium foil is two-sided;
2) hot pressing compound is carried out between modified polypropene layer and ultra low-ash polypropylene layer;
3) hot melt, laminated heat method compound is carried out at the corresponding ultra low-ash outer layer of polypropylene of above-mentioned composite material, hot melt adhesive film and aluminium foil;
4) this compound aluminium foil surface, adhesive, nylon carry out dry laminating, form first product;
5) dry slaking is carried out to this first product, obtain polymer Li-ion battery packaging dedicated film finished product.
Product of the present invention reaches following index through mensuration:
1. peel strength test: electrolyte soaks 85 DEG C, 7 days, and film interlaminar strength is more than or equal to 8N/15mm;
2. permeability resistance test: soak 14 days in the water of 60 DEG C, without layering, weight change is less than 0.05 gram.
3. deep drawability test, the deep-draw degree of depth reaches more than 6mm.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a polymer Li-ion battery packaging high-barrier dedicated film, is characterized in that, comprise modified polypropene layer, ultralow gray scale polypropylene layer, PUR rete, aluminium foil layer, adhesive layer, nylon layer; Described dedicated film is followed successively by modified polypropene layer, ultralow gray scale polypropylene layer, PUR rete, aluminium foil layer, adhesive layer, nylon layer from inside to outside.
2. according to the polymer Li-ion battery packaging high-barrier dedicated film described in claim 1, it is characterized in that, the material of described modified polypropene layer is one or more combinations in polypropylene, low grey polypropylene, low density polyethylene (LDPE), ultra-low density polyethylene or ethylene-octene copolymer.
3., according to the polymer Li-ion battery packaging high-barrier dedicated film described in claim 2, it is characterized in that, in described modified polypropene layer, the polyacrylic gray scale content of low ash should be less than 100ppm.
4., according to the polymer Li-ion battery packaging high-barrier dedicated film described in claim 1, it is characterized in that, the gray scale content in described ultra low-ash polypropylene layer is lower than 10ppm, and thickness is 10-70 μm.
5. according to the polymer Li-ion battery packaging high-barrier dedicated film described in claim 1, it is characterized in that, one or more combinations in described PUR rete in the optional EVA adhesive film of hot melt adhesive film material, PA glued membrane, PES glued membrane, PO glued membrane, TPU glued membrane, PE or POE material.
6. according to the polymer Li-ion battery packaging high-barrier dedicated film described in claim 1, it is characterized in that, the solvent type adhesive of the optional butadiene-styrene rubber of adhesive, polyurethane, celluloid, polyvinyl acetate in described adhesive layer, the aqueous type adhesive of ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, one or more in the Emulsion Adhesive of vinyl acetate resin, acrylic resin.
7. prepare a method for the polymer Li-ion battery packaging high-barrier dedicated film described in any one of claim 1 ~ 6, it is characterized in that, comprise the following steps:
Step 1, carries out plasma corona treatment to modified polypropene one side, nylon one side and ultra low-ash polypropylene are two-sided, carries out chromaking process to aluminium foil is two-sided;
Step 2, carries out hot pressing compound between modified polypropene layer and ultra low-ash polypropylene layer;
Step 3, carries out hot melt, laminated heat method compound at the corresponding ultra low-ash outer layer of polypropylene of above-mentioned composite material, hot melt adhesive film and aluminium foil;
Step 4, this compound aluminium foil surface, binding agent, nylon carry out dry laminating, form first product;
Step 5, carries out dry slaking to this first product, obtains polymer Li-ion battery packaging dedicated film finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510500240.2A CN105070851B (en) | 2015-08-16 | 2015-08-16 | A kind of polymer Li-ion battery packs high-barrier dedicated film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510500240.2A CN105070851B (en) | 2015-08-16 | 2015-08-16 | A kind of polymer Li-ion battery packs high-barrier dedicated film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105070851A true CN105070851A (en) | 2015-11-18 |
| CN105070851B CN105070851B (en) | 2017-10-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510500240.2A Active CN105070851B (en) | 2015-08-16 | 2015-08-16 | A kind of polymer Li-ion battery packs high-barrier dedicated film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105070851B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109037499A (en) * | 2018-07-27 | 2018-12-18 | 杭州中齐新材料科技有限公司 | A kind of new-energy automobile lithium battery flexible packing material |
| CN109397823A (en) * | 2017-08-18 | 2019-03-01 | 刘立健 | A kind of battery case encapsulating material and preparation method thereof |
| CN110311166A (en) * | 2019-06-19 | 2019-10-08 | 华富(江苏)锂电新技术有限公司 | A kind of column lithium ion battery and its preparation process with heating function |
| CN110311165A (en) * | 2019-06-19 | 2019-10-08 | 华富(江苏)锂电新技术有限公司 | A kind of rectangular lithium ion battery and its preparation process with heating function |
| CN110400892A (en) * | 2019-06-19 | 2019-11-01 | 华富(江苏)锂电新技术有限公司 | Lithium ion battery flexible package plastic film of embedded heating function and preparation method thereof |
| CN110615181A (en) * | 2019-10-14 | 2019-12-27 | 宁波瑞成包装材料有限公司 | High-temperature-resistant lithium battery packaging film and preparation method thereof |
| WO2022220652A1 (en) * | 2021-04-15 | 2022-10-20 | 주식회사 엘지에너지솔루션 | Secondary battery |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109397823A (en) * | 2017-08-18 | 2019-03-01 | 刘立健 | A kind of battery case encapsulating material and preparation method thereof |
| CN109037499A (en) * | 2018-07-27 | 2018-12-18 | 杭州中齐新材料科技有限公司 | A kind of new-energy automobile lithium battery flexible packing material |
| CN110311166A (en) * | 2019-06-19 | 2019-10-08 | 华富(江苏)锂电新技术有限公司 | A kind of column lithium ion battery and its preparation process with heating function |
| CN110311165A (en) * | 2019-06-19 | 2019-10-08 | 华富(江苏)锂电新技术有限公司 | A kind of rectangular lithium ion battery and its preparation process with heating function |
| CN110400892A (en) * | 2019-06-19 | 2019-11-01 | 华富(江苏)锂电新技术有限公司 | Lithium ion battery flexible package plastic film of embedded heating function and preparation method thereof |
| CN110615181A (en) * | 2019-10-14 | 2019-12-27 | 宁波瑞成包装材料有限公司 | High-temperature-resistant lithium battery packaging film and preparation method thereof |
| CN110615181B (en) * | 2019-10-14 | 2021-05-28 | 宁波瑞成包装材料有限公司 | High-temperature-resistant lithium battery packaging film and preparation method thereof |
| WO2022220652A1 (en) * | 2021-04-15 | 2022-10-20 | 주식회사 엘지에너지솔루션 | Secondary battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105070851B (en) | 2017-10-03 |
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