CN102867925B - Cell shell structure - Google Patents
Cell shell structure Download PDFInfo
- Publication number
- CN102867925B CN102867925B CN201110188760.6A CN201110188760A CN102867925B CN 102867925 B CN102867925 B CN 102867925B CN 201110188760 A CN201110188760 A CN 201110188760A CN 102867925 B CN102867925 B CN 102867925B
- Authority
- CN
- China
- Prior art keywords
- layer
- barrier layer
- gas barrier
- teflon
- adhesion agent
- 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.)
- Expired - Fee Related
Links
- 229920001721 polyimide Polymers 0.000 claims abstract description 28
- 239000004809 Teflon Substances 0.000 claims abstract description 25
- 229920006362 Teflon® Polymers 0.000 claims abstract description 25
- 239000004642 Polyimide Substances 0.000 claims abstract description 18
- 230000004888 barrier function Effects 0.000 claims description 25
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 239000012528 membrane Substances 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 9
- 229920000098 polyolefin Polymers 0.000 claims description 6
- 239000005030 aluminium foil Substances 0.000 claims description 3
- 229920006254 polymer film Polymers 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract 8
- 238000000576 coating method Methods 0.000 abstract 8
- 239000010410 layer Substances 0.000 abstract 7
- 239000012790 adhesive layer Substances 0.000 abstract 4
- 239000007789 gas Substances 0.000 description 20
- -1 polypropylene Polymers 0.000 description 14
- 239000004743 Polypropylene Substances 0.000 description 6
- 229920001155 polypropylene Polymers 0.000 description 6
- 238000003475 lamination Methods 0.000 description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 229920002620 polyvinyl fluoride Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910003002 lithium salt Inorganic materials 0.000 description 2
- 159000000002 lithium salts Chemical class 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- CQDGTJPVBWZJAZ-UHFFFAOYSA-N monoethyl carbonate Chemical compound CCOC(O)=O CQDGTJPVBWZJAZ-UHFFFAOYSA-N 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007766 curtain coating Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004064 dysfunction Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000005021 flexible packaging material Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- 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
- Sealing Battery Cases Or Jackets (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a cell shell structure which is provided with a gas-barrier layer, a first adhesive layer, a second adhesive layer, an inner coating and an outer coating. The inner coating is adhered to the upper surface of the gas-barrier layer through the first adhesive layer. The outer coating is adhered to the lower surface of the gas-barrier layer through the second adhesive layer. The gas-barrier layer made of metal is arranged at the core of the cell shell structure so as to effectively separate steam. The inner coating is arranged on one side of the gas-barrier layer, and the inner coating is used to coat a cell or contact with an electrolyte. The outer coating is disposed on the other side of the gas-barrier layer. The outer coating is used to protect the gas-barrier layer through polyimide and provide basic weather resistance, and teflon further provides weather resistance and the steam-blocking function. Above all, the cell shell structure provided by the invention has excellent steam resistance and weather resistance.
Description
Technical field
The invention belongs to field of batteries, relate generally to a kind of battery shell layer structure with the composite membrane of being made by polyimides and Teflon.
Background technology
Lithium rechargeable battery is by widely as the power supply of notebook computer, mobile phone, digital camera and electric motor car, and the battery case that is generally used for accommodating battery is metal shell.But along with the prosperity of above-mentioned electronic product is with universal, its lightweight, slimming also come into one's own thereupon, also weight reduction as far as possible of its battery using simultaneously, and dwindle taking up room of battery, and pursue lightweight and slimming.
In order to reach above-mentioned requirements, existing technology is that polyamide film and polypropylene film are enveloped to aluminium foil layer to form battery shell layer structure.But this type of laminar battery case is in actual use, and its intensity, barrier properties for gases (gas that comprises water vapour), durability and weatherability etc. there is no the requirement that method meets industry completely.
Therefore, still need a kind of battery shell layer structure with excellent anti-aqueous vapor effect and weatherability.
Summary of the invention
In order to overcome above-mentioned defect, the invention provides a kind of battery shell layer structure, described battery shell layer structure has excellent anti-aqueous vapor effect and weatherability.
The present invention for the technical scheme that solves its technical problem and adopt is:
A kind of battery shell layer structure, be provided with gas barrier layer, the first adhesion agent layer, the second adhesion agent layer, outer covering layer and for the internal coated layer that is covered in battery, the composite membrane of described outer covering layer for being made by polyimides (PI) and Teflon, described gas barrier layer has relative upper and lower surface, described internal coated layer adheres to described gas barrier layer upper surface by the first adhesion agent layer, and described outer covering layer adheres to described gas barrier layer lower surface by the second adhesion agent layer.
Further technical scheme of the present invention is:
The described composite membrane of being made by polyimides and Teflon can be by polyimide film and Teflon film fit form, and described polyimide film is between described Teflon film and described the second adhesion agent layer.The thickness of described polyimide film and Teflon film is all 3 to 30 microns.
The described composite membrane of being made by polyimides and Teflon can be also the co-extruded films of polyimides and Teflon.
Described internal coated layer is polyolefin thin polymer film or polyolefin copolymer film.
Described gas barrier layer is metal level, preferably aluminium foil.
The thickness of described gas barrier layer is 30 to 50 microns, and the thickness of described internal coated layer is 30 to 100 microns, and the thickness of described outer covering layer is 10 to 50 microns.
The invention has the beneficial effects as follows: the present invention is arranged at the gas barrier layer of metal material the core of described battery shell layer structure for effectively intercepting aqueous vapor; and in the one side of gas barrier layer, internal coated layer is set; internal coated layer is for being coated battery or contacting with electrolyte; on gas barrier layer another side, outer covering layer is set; outer covering layer is to be protected described gas barrier layer and basic weatherability is provided by polyimides; and further provide weatherability and the airway dysfunction that blocks water by Teflon; to sum up, battery shell layer structure of the present invention has excellent anti-aqueous vapor effect and weatherability.
Accompanying drawing explanation
Fig. 1 and Fig. 2 are battery shell layer structure schematic diagram of the present invention, and wherein, Fig. 2 is for illustrating that outer covering layer forms for being fitted by polyimide film and Teflon film;
Description of reference numerals
10 gas barrier layers
10a gas barrier layer upper surface
10b gas barrier layer lower surface
11a the first adhesion agent layer
11b the second adhesion agent layer
12 internal coated layers
13 outer covering layers
13a polyimide film
13b Teflon film.
Embodiment
Embodiment: a kind of battery shell layer structure, as shown in Figures 1 and 2, be provided with the gas barrier layer 10, the first adhesion agent layer 11a, the second adhesion agent layer 11b, outer covering layer 13 of metal material and for the internal coated layer 12 that is covered in battery, the composite membrane of described outer covering layer 13 for being made by polyimides and Teflon, described gas barrier layer 10 has relative upper and lower surperficial 10a, 10b, in described, cover 12 layers and adhere to described gas barrier layer upper surface 10a by the first adhesion agent layer 11a, described outer covering layer 13 adheres to described gas barrier layer lower surface 10b by the second adhesion agent layer 11b.
The preparation method of the battery shell layer structure of the present embodiment is as follows: be mainly that preparation one material is for example that aluminium sheet and thickness are the gas barrier layer 10 of 30 to 50 microns, thereon, lower surface 10a, 10b if the first adhesion agent layer 11a of epoxy resin or polyurethane and the second adhesion agent layer 11b bond thickness are the internal coated layer 12 of 30 to 100 microns and the outer covering layer 13 of 10 to 50 microns, can obtain the battery shell layer structure of the present embodiment by material.
In the present embodiment, described internal coated layer 12 is polyolefin thin polymer film or polyolefin copolymer film.For example, polyethylene or polypropylene, or the copolymer of polyethylene and/or polypropylene and other alkene, described internal coated layer 12 also can be sour sex change polyolefin-based resins, for example the disclosed thermal bonding resin of I227693 Taiwan patent.The thickness of described the first adhesion agent layer 11a and the second adhesion agent layer 11b is all 3 to 5 microns.
Structure aspect preferably, is exemplified below again:
For example, described internal coated layer 12 is polypropylene film, and described outer covering layer 13 is the composite membrane of polyimides and Teflon, for example the co-extruded films of polyimides and Teflon; Or by respectively the do for oneself polyimide film 13a of 3 to 30 microns and Teflon film 13b laminating institute of thickness, formed, and described polyimide film 13a is folded between described the second adhesion agent layer 11b and Teflon film 13b as shown in Figure 1B.When described outer covering layer 13 is the composite membrane of polyimides and Teflon, can promote the adhesion strength between the second adhesion agent layer 11b and outer covering layer 13 by polyimides.
Teflon described in the present invention, refer to fluoropolymer, for example, polyvinyl fluoride (Polyvinyl fluoride, PVF), Kynoar (Polyvinylidene fluoride, PVDF), polytrifluorochloroethylene (Polychlorotrifluorethylene, PCTFE), polytetrafluoroethylene (polytetrafluorethylene, and take the copolymer of polytetrafluoroethylene and tetrafluoroethene and ethene as good PTFE) or the copolymer of tetrafluoroethene and ethene (ETFE).
Test case: state below appraisal procedure and test (evaluation method is in Table 1), and result is embedded in to table 2.
1. formability: according to the record of table 2, make the lamination (110mmx180mm) for battery shell layer sample, go out with metal die punch forming the battery shell layer sample that 6mm is dark.Drift R angle=1 of the metal die using is to 2mm, punching flange R=1mm, mould flange R=0.5mm.
2. sealing evaluation: inject electrolyte (dimethyl carbonate and ethyl carbonate (1: 1) and lithium salts) in the rectangular cell shell forming at said method, after heat seal, battery shell layer is inverted, preserve month at 60 ℃, confirm to have or not sealing.
3. water vapour permeability: fill battery in the rectangular cell shell forming at said method, be sealed under the environment of 60 ℃ of x90%RH and preserve seven days, measure the amount of moisture in electrolyte with Ka Er-Fei Xiefa.
4. electrolyte resistance characteristic: be determined in electrolyte (dimethyl carbonate and ethyl carbonate (1: 1) and lithium salts) and flood the laminated sheet intensity after seven days under normal temperature.
Table 1:
| Evaluation method | Formability | Electrolyte resistance |
| ◎ | Flawless | Lamination strength, unchanged |
| ○ | Very small portion cracks | Lamination strength, conservation rate is more than 60% |
| △ | More most cracking | Lamination strength, conservation rate is more than 60% |
| × | Whole face cracks | Lamination strength, layering |
Polypropylene: (South Asia plastics, curtain coating type polypropylene film)
Epoxy resin: the epoxy resin that adopts Asia electricity material to prepare, AEM-V1
Aluminium sheet: adopt Nippon Light Metal Co., Ltd, 8079-O,
Polyimides (PI): SKC Kolon, FEP
Teflon (PTFE): Dupont Kapton, FN PI film
Table 2:
The vapor permeability of conventional batteries shell structurre is general large more than 100ppm, and battery shell layer structure of the present invention can reduce aqueous vapor penetrance significantly to 35ppm, has excellent anti-aqueous vapor effect, is suitable for lithium battery flexible packaging material.
Claims (1)
1. a battery shell layer structure, it is characterized in that: be provided with gas barrier layer, the first adhesion agent layer, the second adhesion agent layer, outer covering layer and for the internal coated layer that is covered in battery, the composite membrane of described outer covering layer for being made by polyimides and Teflon, described gas barrier layer has relative upper and lower surface, described internal coated layer adheres to described gas barrier layer upper surface by the first adhesion agent layer, and described outer covering layer adheres to described gas barrier layer lower surface by the second adhesion agent layer;
The described composite membrane of being made by polyimides and Teflon be by polyimide film and Teflon film fit form, and described polyimide film is between described Teflon film and described the second adhesion agent layer;
The thickness of described polyimide film and described Teflon film is all 3 to 30 microns;
Described internal coated layer is a kind of in polyolefin polymer film and polyolefin co-polymer membrane;
Described gas barrier layer is aluminium foil;
The thickness of described gas barrier layer is 30 to 50 microns;
The thickness of described internal coated layer is 30 to 100 microns;
The thickness of described outer covering layer is 10 to 50 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110188760.6A CN102867925B (en) | 2011-07-07 | 2011-07-07 | Cell shell structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110188760.6A CN102867925B (en) | 2011-07-07 | 2011-07-07 | Cell shell structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102867925A CN102867925A (en) | 2013-01-09 |
| CN102867925B true CN102867925B (en) | 2014-08-20 |
Family
ID=47446639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110188760.6A Expired - Fee Related CN102867925B (en) | 2011-07-07 | 2011-07-07 | Cell shell structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102867925B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM507349U (en) * | 2015-05-15 | 2015-08-21 | Asia Electronic Material Co | Battery shell structure |
| CN108943909A (en) * | 2017-05-27 | 2018-12-07 | 昆山雅森电子材料科技有限公司 | A kind of battery shell layer structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314008A (en) * | 1999-04-08 | 2001-09-19 | 大日本印刷株式会社 | meterial for packaging cell, bag for packaging cell, and its production method |
| JP2004006226A (en) * | 2002-04-17 | 2004-01-08 | Hitachi Maxell Ltd | Battery |
| CN1475037A (en) * | 2000-10-13 | 2004-02-11 | �Ѻ͵繤��װ��ʽ���� | Packaging material for electronic-part case, and others |
| CN1581531A (en) * | 2003-08-11 | 2005-02-16 | 昭和电工包装株式会社 | Package mateerial for cell housing and cell housing formed thereby |
| CN101273465A (en) * | 2005-09-30 | 2008-09-24 | 东丽株式会社 | Encapsulation film for photovoltaic module and photovoltaic module |
-
2011
- 2011-07-07 CN CN201110188760.6A patent/CN102867925B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1314008A (en) * | 1999-04-08 | 2001-09-19 | 大日本印刷株式会社 | meterial for packaging cell, bag for packaging cell, and its production method |
| CN1475037A (en) * | 2000-10-13 | 2004-02-11 | �Ѻ͵繤��װ��ʽ���� | Packaging material for electronic-part case, and others |
| JP2004006226A (en) * | 2002-04-17 | 2004-01-08 | Hitachi Maxell Ltd | Battery |
| CN1581531A (en) * | 2003-08-11 | 2005-02-16 | 昭和电工包装株式会社 | Package mateerial for cell housing and cell housing formed thereby |
| CN101273465A (en) * | 2005-09-30 | 2008-09-24 | 东丽株式会社 | Encapsulation film for photovoltaic module and photovoltaic module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102867925A (en) | 2013-01-09 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 |