CN111211256A - Flexible packaging film with photovoltaic characteristic and secondary battery - Google Patents
Flexible packaging film with photovoltaic characteristic and secondary battery Download PDFInfo
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- CN111211256A CN111211256A CN202010020755.3A CN202010020755A CN111211256A CN 111211256 A CN111211256 A CN 111211256A CN 202010020755 A CN202010020755 A CN 202010020755A CN 111211256 A CN111211256 A CN 111211256A
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- photovoltaic
- layer
- thin film
- secondary battery
- film
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- 238000009459 flexible packaging Methods 0.000 title claims abstract description 42
- 239000012785 packaging film Substances 0.000 title claims abstract description 42
- 229920006280 packaging film Polymers 0.000 title claims abstract description 42
- 239000010410 layer Substances 0.000 claims abstract description 97
- 239000010409 thin film Substances 0.000 claims abstract description 91
- 239000000758 substrate Substances 0.000 claims abstract description 41
- 239000010408 film Substances 0.000 claims abstract description 35
- 239000012793 heat-sealing layer Substances 0.000 claims abstract description 31
- 238000004806 packaging method and process Methods 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 12
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical group [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 9
- 229910001416 lithium ion Inorganic materials 0.000 claims description 9
- 229920000642 polymer Polymers 0.000 claims description 9
- 230000001131 transforming effect Effects 0.000 claims description 3
- 239000012790 adhesive layer Substances 0.000 claims description 2
- 239000008393 encapsulating agent Substances 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000005538 encapsulation Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 9
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 8
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 8
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 8
- 229910052744 lithium Inorganic materials 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 7
- 239000002346 layers by function Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 6
- -1 polyethylene Polymers 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000012858 packaging process Methods 0.000 description 5
- 229910021417 amorphous silicon Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229920006255 plastic film Polymers 0.000 description 4
- 239000002985 plastic film Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000011787 zinc oxide Substances 0.000 description 4
- WUPHOULIZUERAE-UHFFFAOYSA-N 3-(oxolan-2-yl)propanoic acid Chemical compound OC(=O)CCC1CCCO1 WUPHOULIZUERAE-UHFFFAOYSA-N 0.000 description 3
- 229910052980 cadmium sulfide Inorganic materials 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- MARUHZGHZWCEQU-UHFFFAOYSA-N 5-phenyl-2h-tetrazole Chemical compound C1=CC=CC=C1C1=NNN=N1 MARUHZGHZWCEQU-UHFFFAOYSA-N 0.000 description 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 2
- 229910013872 LiPF Inorganic materials 0.000 description 2
- 101150058243 Lipf gene Proteins 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 229920002873 Polyethylenimine Polymers 0.000 description 2
- KTSFMFGEAAANTF-UHFFFAOYSA-N [Cu].[Se].[Se].[In] Chemical compound [Cu].[Se].[Se].[In] KTSFMFGEAAANTF-UHFFFAOYSA-N 0.000 description 2
- FTWRSWRBSVXQPI-UHFFFAOYSA-N alumanylidynearsane;gallanylidynearsane Chemical compound [As]#[Al].[As]#[Ga] FTWRSWRBSVXQPI-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- WILFBXOGIULNAF-UHFFFAOYSA-N copper sulfanylidenetin zinc Chemical compound [Sn]=S.[Zn].[Cu] WILFBXOGIULNAF-UHFFFAOYSA-N 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 229910003473 lithium bis(trifluoromethanesulfonyl)imide Inorganic materials 0.000 description 2
- VDVLPSWVDYJFRW-UHFFFAOYSA-N lithium;bis(fluorosulfonyl)azanide Chemical compound [Li+].FS(=O)(=O)[N-]S(F)(=O)=O VDVLPSWVDYJFRW-UHFFFAOYSA-N 0.000 description 2
- QSZMZKBZAYQGRS-UHFFFAOYSA-N lithium;bis(trifluoromethylsulfonyl)azanide Chemical compound [Li+].FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F QSZMZKBZAYQGRS-UHFFFAOYSA-N 0.000 description 2
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- PZWQOGNTADJZGH-SNAWJCMRSA-N (2e)-2-methylpenta-2,4-dienoic acid Chemical compound OC(=O)C(/C)=C/C=C PZWQOGNTADJZGH-SNAWJCMRSA-N 0.000 description 1
- QLZJUIZVJLSNDD-UHFFFAOYSA-N 2-(2-methylidenebutanoyloxy)ethyl 2-methylidenebutanoate Chemical compound CCC(=C)C(=O)OCCOC(=O)C(=C)CC QLZJUIZVJLSNDD-UHFFFAOYSA-N 0.000 description 1
- 229910000980 Aluminium gallium arsenide Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 1
- KLARSDUHONHPRF-UHFFFAOYSA-N [Li].[Mn] Chemical compound [Li].[Mn] KLARSDUHONHPRF-UHFFFAOYSA-N 0.000 description 1
- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical compound [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 description 1
- KFDQGLPGKXUTMZ-UHFFFAOYSA-N [Mn].[Co].[Ni] Chemical compound [Mn].[Co].[Ni] KFDQGLPGKXUTMZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 229920006226 ethylene-acrylic acid Polymers 0.000 description 1
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 1
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910021385 hard carbon Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229920000831 ionic polymer Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- BDKWOJYFHXPPPT-UHFFFAOYSA-N lithium dioxido(dioxo)manganese nickel(2+) Chemical compound [Mn](=O)(=O)([O-])[O-].[Ni+2].[Li+] BDKWOJYFHXPPPT-UHFFFAOYSA-N 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- IGILRSKEFZLPKG-UHFFFAOYSA-M lithium;difluorophosphinate Chemical compound [Li+].[O-]P(F)(F)=O IGILRSKEFZLPKG-UHFFFAOYSA-M 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910021424 microcrystalline silicon Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 229910021384 soft carbon Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
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 of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/46—Accumulators structurally combined with charging apparatus
- H01M10/465—Accumulators structurally combined with charging apparatus with solar battery as charging system
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- 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
Abstract
The present invention provides a flexible encapsulating film having photovoltaic characteristics and a secondary battery, the flexible encapsulating film having photovoltaic characteristics comprising: a photovoltaic film layer and a heat seal layer; the photovoltaic thin film layer comprises N photovoltaic thin film units and an insulating substrate shared by the N photovoltaic thin film units, the insulating substrate covers the heat sealing layer, and N is larger than or equal to 1. The flexible packaging film with the photovoltaic characteristic can effectively package the battery cell, enables the secondary battery to have the photovoltaic characteristic, effectively improves the portability of a solar-secondary battery integrated system, is beneficial to obtaining the high-quality secondary battery with the self-charging function, and further improves the cruising ability of the direct current device.
Description
Technical Field
The invention relates to a flexible packaging film with photovoltaic characteristics, in particular to a flexible packaging film with photovoltaic characteristics and a secondary battery, and belongs to the technical field of energy.
Background
Solar energy is an ideal renewable energy source as a clean energy source which is continuously utilized. Among them, solar photovoltaic property is an important form of solar energy utilization, and particularly an energy conversion form of directly converting solar energy radiation into electric energy. At this stage, photovoltaic characteristics have been increasingly valued and applied.
At present, the solar cell has become one of the development directions of the lithium ion battery as the power supply source of the lithium ion battery. For example, a lithium ion battery, a solar battery, an LED lamp and other related components are fixed by an external shell to form a set of complete integrated equipment for solar battery power generation, lithium battery power storage and LED power utilization. However, this device is realized by simply fixing the external case to the combination of the solar cell and the lithium cell, and is not highly integrated and not portable. In addition, lithium ion batteries and solar batteries are manufactured on both sides of a glass substrate. Due to the limitation of the substrate, effective packaging of the lithium ion battery cell is difficult to realize, and the phenomenon of electrolyte leakage is likely to occur, so that the service life of the lithium ion battery with the self-charging function is influenced, and safety accidents are more likely to be caused.
Disclosure of Invention
The invention provides a flexible packaging film with photovoltaic characteristics, which can effectively package a battery cell, has photovoltaic characteristics, improves the integration level and portability of a secondary battery with self-charging functions, and is beneficial to obtaining a high-quality secondary battery with self-charging functions.
The invention also provides a secondary battery which not only has a self-charging function, but also has stronger practicability, and overcomes the defects of low portability, short service life and higher use risk of a secondary battery with the self-charging function of a solar battery-secondary battery integrated system in the prior art.
The invention also provides a direct current device which comprises the secondary battery.
The invention provides a flexible packaging film with photovoltaic characteristics, which comprises: a photovoltaic film layer and a heat seal layer;
the photovoltaic thin film layer comprises N photovoltaic thin film units and an insulating substrate shared by the N photovoltaic thin film units, the insulating substrate covers the heat sealing layer, and N is larger than or equal to 1.
The flexible encapsulating film having photovoltaic characteristics as described above, wherein the material of the insulating substrate is a polymer.
The flexible packaging film with photovoltaic characteristics as described above, wherein when N > 1, any two of the photovoltaic thin film units are in series or parallel relationship.
The flexible packaging film with photovoltaic characteristics further comprises a packaging layer, wherein the packaging layer is arranged between the photovoltaic thin film layer and the heat sealing layer.
The flexible packaging film with photovoltaic characteristics as described above, wherein the packaging layer is bonded between the photovoltaic thin film layer and the heat sealing layer through an adhesive layer.
The invention also provides a secondary battery, which is obtained by packaging a battery cell by using any one of the flexible packaging films with photovoltaic characteristics.
The secondary battery as described above, wherein the secondary battery includes a first wire and a second wire, two ends of the first wire are respectively connected to the first electrode of the flexible encapsulation film and the first tab of the battery cell, and two ends of the second wire are respectively connected to the second electrode of the flexible encapsulation film and the second tab of the battery cell.
The secondary battery as described above, further comprising a voltage transforming unit and/or a control unit.
The secondary battery as described above, wherein the secondary battery is a lithium ion battery.
The present invention also provides a direct current device comprising any of the above secondary batteries.
The implementation of the invention has at least the following advantages:
1. the flexible packaging film with the photovoltaic characteristic can be used for packaging the battery core, and can enable the battery obtained by packaging to have the photovoltaic characteristic, so that the flexible packaging film with the photovoltaic characteristic is beneficial to obtaining a secondary battery with high quality and a self-charging function, and is suitable for large-scale popularization and application;
2. the flexible packaging film with the photovoltaic characteristic is convenient to use and strong in operability, and has the same use method as that of a common aluminum plastic film, so that a high-quality secondary battery with the self-charging function can be obtained by a simple and quick method, and the integration level and the portability of the secondary battery with the self-charging function are improved;
3. according to the secondary battery, the flexible packaging film with the photovoltaic characteristic is adopted for packaging, so that the secondary battery has a self-charging function, the working efficiency and the service life of the secondary battery are not influenced, the charging and discharging mechanism of the battery can be adjusted through photovoltaic charging, excessive discharging is avoided for example, and the working efficiency and the service life of an integrated system are improved;
4. the dc device of the present invention has excellent cruising ability because the secondary battery is used as a power supply.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a flexible encapsulating film with photovoltaic properties according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a flexible encapsulating film having photovoltaic characteristics according to still another embodiment of the present invention.
Description of reference numerals:
1: a photovoltaic thin film layer;
11: a photovoltaic thin film unit;
12: an insulating substrate;
2: a heat seal layer;
3: and (7) packaging the layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically stated otherwise.
Fig. 1 is a schematic structural diagram of a flexible encapsulation film with photovoltaic characteristics according to an embodiment of the present invention. As shown in fig. 1, the flexible encapsulating film having photovoltaic characteristics of the present embodiment includes: a photovoltaic thin film layer 1 and a heat sealing layer 2;
the photovoltaic thin film layer 1 comprises N photovoltaic thin film units 11 and an insulating substrate 12 shared by the N photovoltaic thin film units 11, the insulating substrate 12 covers the heat sealing layer 2, and N is larger than or equal to 1.
The flexible packaging film with photovoltaic characteristics is mainly used for packaging, and can be used for packaging of a battery cell.
The flexible packaging film with the photovoltaic characteristic comprises a heat sealing layer 2 and a photovoltaic thin film layer 1 arranged on the heat sealing layer 2, wherein the photovoltaic thin film layer 1 comprises an insulating substrate 12 which has the same area as the heat sealing layer 2 and covers the heat sealing layer 2, and N photovoltaic thin film units 11 arranged on the insulating substrate 12.
The material of the heat-sealing layer 2 may be the material of the heat-sealing layer at the present stage in the art, for example, the heat-sealing layer 2 may be one or more of polyolefin materials such as polyethylene and polypropylene, ionic polymers, ethylene-acrylic acid polymers, ethylene-ethyl acrylate, and ethylene-methacrylic acid, and the thickness of the heat-sealing layer 2 may also be the same as the thickness of the polyolefin heat-sealing layer in the aluminum plastic film at the present stage in the art.
In the photovoltaic thin film layer 1, the N photovoltaic thin film units 11 are main body structures of the photovoltaic thin film layer 1, can independently convert solar energy into electric energy, and have flexibility, and the thickness of the photovoltaic thin film units is 0.1-100 μm, and further 1-20 μm;
the insulating substrate 12 is used for carrying the N photovoltaic film units 11, and not only has flexibility but also can be used for preventing external moisture from entering the sealed space of the package, so as to provide further protection for the object to be packaged, for example, the insulating substrate can be a polymer, wherein the polymer is polyimide or a polyester polymer with a melting point greater than 200 ℃, the polyester polymer is polyethylene terephthalate or polyethylene naphthalate, and the thickness of the insulating substrate 12 is 10-100 μm, and further 20-60 μm;
specifically, the heat sealing layer 2 can be melted at a certain heating temperature and bonded after cooling, so that the heat sealing layer 2 is in contact with the object to be packaged in the packaging process and provides a closed space for the object to be packaged; the photovoltaic film layer 1 has photovoltaic characteristics and flexibility, it sets up in the upper surface of heat-seal layer 2 and is in the outermost when treating the encapsulation completion, be used for under plane or non-planar condition converting solar energy into electric energy and storing the electric energy, wherein, N photovoltaic film unit 11 in the photovoltaic film layer 1 has the flexibility and is used for converting solar energy into electric energy and stores the electric energy, insulating substrate 12 that N photovoltaic film unit 11 shares has the flexibility and is used for providing the bearing for N photovoltaic film unit 11 in, can also be used for preventing outside steam from getting into above-mentioned airtight space inside, thereby for treating the encapsulation and provide further protection.
In particular, the invention does not limit the sequence between the heat-sealing layer 2 and the photovoltaic thin film layer 1 in the preparation process.
For example, the heat sealing layer 2 may be disposed on the upper surface of the carrier plate, then the insulating substrate 12 and the photovoltaic thin film unit 11 are sequentially disposed on the upper surface of the heat sealing layer 2, and finally the carrier plate is removed, so as to obtain the flexible packaging film with photovoltaic characteristics according to the embodiment;
or firstly arranging an insulating substrate 12 on the upper surface of the carrier plate, then arranging the photovoltaic thin film unit 11 on the upper surface of the insulating substrate 12, removing the carrier plate, and then arranging the heat sealing layer 2 on the lower surface of the insulating substrate 12 to obtain the flexible packaging film with photovoltaic characteristics of the embodiment;
or arranging an insulating substrate 12 on the upper surface of the carrier plate, removing the carrier plate, arranging a heat-sealing layer 2 on the lower surface of the insulating substrate 12, and arranging a photovoltaic thin film unit 11 on the upper surface of the insulating substrate 12 to obtain the flexible packaging film with photovoltaic characteristics of the embodiment;
the invention is not limited to the specific arrangement mode between the thin film photovoltaic layer 1 and the heat sealing layer 2, for example, the photovoltaic thin film layer 1 can be arranged on the upper surface of the heat sealing layer 2 by bonding, mechanical pressing and the like. Wherein, if the bonding mode is adopted, a polyethyleneimine adhesive, a polyurethane adhesive or a melamine adhesive can be selected.
Taking an electric core as an example, when the electric core is specifically packaged by using the flexible packaging film with the photovoltaic characteristic, firstly, the flexible packaging film with the photovoltaic characteristic is subjected to pit punching operation, and is folded to form an area with three open sides and two opposite sides being heat sealing layers 2, then, the electric core is placed in the area, electrolyte is filled for primary heat sealing, air is discharged after formation, and secondary heat sealing is performed, so that the secondary battery is obtained. It can be understood that if a solid-state battery is prepared, a cell is formed by lamination or winding of the positive electrode/solid electrolyte membrane/negative electrode, and no electrolyte needs to be added.
The method for packaging the battery cell by using the flexible packaging film with the photovoltaic characteristic is the same as the method for packaging the battery cell by using the aluminum plastic film at the present stage, so that the effective packaging of the battery cell can be rapidly and efficiently completed, liquid leakage caused by incomplete packaging can be avoided, and the working performance and the service life of the secondary battery can be effectively ensured.
After the encapsulation, the photovoltaic thin film layer 1 is arranged outside the whole secondary battery, so that the self-charging performance of the secondary battery is endowed through the encapsulation of the battery cell, and the secondary battery has photovoltaic characteristics. Therefore, the flexible packaging film with the photovoltaic property can enable the secondary battery to have the photovoltaic property in a convenient and efficient way in the packaging process of the secondary battery, and a large amount of labor and material cost is not required.
In the present invention, the size, the energy conversion principle, and the like of each photovoltaic thin film unit 11 may be the same or different, as long as the conversion from solar energy to electric energy and the storage of electric energy can be realized, and the photovoltaic thin film unit has flexibility. Of course, it is known from the common knowledge that the photovoltaic thin film cells 11 having higher uniformity can maximally exhibit the functions of the respective cells when connected in series or in parallel.
The number of the photovoltaic thin-film cells 11 can be determined as necessary. Specifically, since each photovoltaic thin-film cell 11 has a limited conversion rate of solar energy, the specific number of photovoltaic thin-film cells 11 can be determined according to the actual charging voltage of the secondary battery. It can be understood that the higher the actual charge voltage of the secondary battery is, the greater the number of photovoltaic thin-film cells 11 in the photovoltaic thin-film layer 1 is. When the number of the photovoltaic thin film units 11 is greater than 1, a plurality of photovoltaic thin film units 11 are distributed on the upper surface of the insulating substrate 12 in an array manner, and form the photovoltaic thin film layer 1 together with the insulating substrate 12.
In one embodiment, the photovoltaic thin film unit 11 may be a photovoltaic functional layer of a microcrystalline silicon thin film solar cell having a thickness of 1 μm as known in the art.
Because the thickness of the thin-film solar cell is in the micron level and has flexibility, the flexible packaging film with the photovoltaic characteristic can realize effective packaging and has the photovoltaic characteristic, has flexibility to a certain degree, and can not cause rupture failure of electric core packaging due to bending, so that the application range is wider. And because the thin-film solar cell is small in thickness and light in weight, the negative influence on the mass energy density and the volume energy density of the secondary cell can be minimized.
Further, in the N thin film photovoltaic units 11, any two thin film photovoltaic units 11 may be connected in parallel or in series, and after the N photovoltaic thin film units 11 are connected to each other, an electric energy output end of the flexible encapsulation film with photovoltaic characteristics, that is, a first electrode and a second electrode, may be formed as the first electrode or the negative electrode, and the polarity of the second electrode is opposite to that of the first electrode. Here, the connection relationship between any two thin film photovoltaic units 11 may be further determined according to the charging voltage of the secondary battery. Specifically, the connection relationship of the respective thin film photovoltaic cells 11 may be realized by a metal gate line.
In a specific embodiment, the photovoltaic thin film unit 11 of the present invention may be a photovoltaic functional layer of an amorphous silicon thin film solar cell, and the photovoltaic thin film unit 11 may include, in a direction sequentially away from the insulating substrate 12: the metal back electrode, the N layer (N type hydrogenated amorphous silicon film layer), the I layer (intrinsic hydrogenated amorphous silicon film layer), the P layer (P type hydrogenated amorphous silicon carbide or silicon film layer), the transparent conductive oxide top electrode and the metal grid line.
In another embodiment, the photovoltaic thin film unit 11 of the present invention may be a photovoltaic functional layer of a gallium arsenide thin film solar cell, and the photovoltaic thin film unit 11 may include, in a direction sequentially away from the insulating substrate 12: gallium arsenide substrate, gallium arsenide buffer layer, aluminum gallium arsenide, gallium arsenide base layer, gallium arsenide emitting layer, aluminum gallium arsenide window layer, upper electrode.
In another specific embodiment, the photovoltaic thin film unit 11 of the present invention may be a photovoltaic functional layer of a copper indium gallium selenide thin film solar cell, and the photovoltaic thin film unit 11 may include, in a direction sequentially away from the insulating substrate 12: a molybdenum back contact layer, a copper indium gallium selenide absorption layer, a buffer layer (cadmium sulfide or other cadmium-free materials), a window layer (intrinsic zinc oxide or aluminum-doped zinc oxide), an antireflection layer magnesium difluoride and a top electrode.
In another embodiment, the photovoltaic thin film unit 11 of the present invention may be a photovoltaic functional layer of a cadmium telluride thin film solar cell, and the photovoltaic thin film unit 11 may include, in a direction sequentially away from the insulating substrate 12: back contact, P-type cadmium telluride layer, N-type cadmium sulfide, transparent conductive oxide.
In another embodiment, the photovoltaic thin film unit 11 of the present invention may be a photovoltaic functional layer of a copper zinc tin sulfide thin film solar cell, and the photovoltaic thin film unit 11 may include, in a direction sequentially away from the insulating substrate 12: a molybdenum layer, a copper zinc tin sulfur layer, a cadmium sulfide layer, an intrinsic zinc oxide layer, an aluminum-doped zinc oxide layer, a magnesium difluoride layer and a nickel-aluminum layer.
In addition, the photovoltaic thin film unit 11 of the present invention may also be a photovoltaic functional layer of an organic thin film solar cell, a dye-sensitized thin film solar cell, a perovskite thin film solar cell, and the like, which are commonly found in the art, and the specific structure of the above cells is not described again. The photovoltaic thin-film cell 11 of the present invention can also be a multijunction solar cell structure. The principle of the multi-junction solar cell is to make a plurality of sub-cells from materials with different band gap widths, and then to stack the sub-cells from top to bottom according to the band gap widths, so the multi-junction solar cell is also called a tandem solar cell. Each sub-cell can only absorb and convert photon energy in a wave band matched with the band gap width of the sub-cell in the solar spectrum, so that the formed multi-junction solar cell can more fully absorb and convert the solar energy than a single-junction solar cell, and the conversion efficiency is improved, for example, an AlGaAs/GaAs double-junction structure, a GaInP/GaAs double-junction structure, a CuInGaSe/perovskite double-junction structure or a GaInP/GaAs/Ge triple-junction structure.
Fig. 2 is a schematic structural diagram of a flexible encapsulating film having photovoltaic characteristics according to still another embodiment of the present invention. On the basis of the foregoing embodiment, the flexible encapsulating film with photovoltaic characteristics of the present embodiment further includes an encapsulating layer 3, and the encapsulating layer 3 is disposed between the photovoltaic thin film layer 1 and the heat-seal layer 2.
Wherein, encapsulation layer 3 can be formed between photovoltaic film layer 1 and heat-seal layer 2 through the tie coat for further protect the electric core of encapsulation in heat-seal layer 2, avoid the influence of external steam and external force to electric core.
Specifically, the encapsulation layer 3 and the photovoltaic thin film layer 1 are bonded through a first bonding layer, and the encapsulation layer 3 and the heat seal layer 2 are bonded through a second bonding layer. The first bonding layer and the second bonding layer can be one or more of polyethyleneimine adhesive, polyurethane adhesive or melamine adhesive, and the thickness of the first bonding layer and the thickness of the second bonding layer are both 1-20 mu m.
In the preparation process, the sequence of the heat sealing layer 2, the packaging layer 3 and the photovoltaic thin film layer 1 is not limited by the invention.
For example, the heat sealing layer 2 may be disposed on the upper surface of the carrier, then the encapsulation layer 3 and the photovoltaic thin film layer 1 are sequentially disposed on the upper surface of the heat sealing layer 2 (assembly of the photovoltaic thin film unit 11 and the insulating substrate 12 is completed in advance), and finally the carrier is removed, so as to obtain the flexible encapsulation film with photovoltaic characteristics according to the embodiment;
or firstly arranging an insulating substrate 12 on the upper surface of the carrier plate, then arranging a photovoltaic film unit 11 on the surface of the insulating substrate 12, removing the carrier plate, and then sequentially arranging a packaging layer 3 and a heat sealing layer 2 on the lower surface of the insulating substrate 12 to obtain the flexible packaging film with photovoltaic characteristics of the embodiment;
the flexible packaging film with the photovoltaic characteristic of the embodiment can also be obtained by arranging the packaging layer 3 on the upper surface of the carrier plate, arranging the photovoltaic thin film layer 1 on the upper surface of the packaging layer 3 (the assembly of the photovoltaic thin film unit 11 and the insulating substrate 12 is completed in advance), removing the carrier plate, and arranging the heat sealing layer 2 on the lower surface of the packaging layer 3;
in one embodiment, the encapsulation layer 3 may be a metal layer, such as aluminum; the thickness of the encapsulation layer 3 may be 10-80 μm.
In addition, a polymer protective layer can be arranged on the upper surface of the photovoltaic thin film layer 1 to protect the photovoltaic thin film layer 1, so that the photovoltaic performance of the photovoltaic thin film unit 11 in the photovoltaic thin film layer 1 is guaranteed, and the photovoltaic service life is prolonged. It can be understood that in order to guarantee a maximum of photovoltaic performance, the polymeric protective layer needs to have good light transmission characteristics, for example it may be transparent.
In a specific preparation process, the polymer protective layer may also be arranged after the cell is packaged, so as to further protect the photovoltaic thin film unit 11 on the outer layer of the cell.
The flexible packaging film with the photovoltaic characteristic can be used for effectively packaging the battery cell, and can endow the packaged secondary battery with self-charging performance while packaging the battery cell due to the photovoltaic characteristic, so that the high-quality secondary battery with the self-charging performance can be obtained by a faster and more convenient method by utilizing the flexible packaging film with the photovoltaic characteristic.
In another aspect, the present invention also provides a secondary battery including any one of the flexible encapsulating films having photovoltaic characteristics described above.
Specifically, the secondary battery is obtained by encapsulating a battery cell with the flexible encapsulating film having photovoltaic characteristics as described in any one of the above.
The battery cell comprises a positive electrode, a negative electrode and a diaphragm, and the positive electrode, the negative electrode and the diaphragm are assembled by a winding process or a lamination process to obtain the battery cell.
In the packaging process, firstly, pit punching operation is carried out on the flexible packaging film with the photovoltaic characteristic, the battery cell is placed in the pit, then the flexible packaging film with the photovoltaic characteristic is folded in half, the battery cell is wrapped in the area with three openings, then the two opposite openings are heated, pressed and heat-sealed, electrolyte is injected, the remaining opening is heat-sealed, and after formation and exhaust, secondary heat-sealing is carried out, so that the secondary battery disclosed by the invention is obtained. If an all-solid-state battery cell is adopted, the injection of the electrolyte is not needed.
Through the packaging process, the method for packaging the battery cell by using the flexible packaging film with the photovoltaic property is the same as the method for packaging the battery cell by using the aluminum plastic film at the present stage in the field, so that the secondary battery with the photovoltaic property and high quality can be obtained by packaging the battery cell by using the flexible packaging film with the photovoltaic property, the preparation method of the secondary battery with the photovoltaic property is simplified, and the adjustment of a charging and discharging mechanism of the battery can be realized through photovoltaic charging, for example, over-discharge is avoided, so that the working efficiency and the service life of the integrated system are improved.
In the packaging process, the photovoltaic thin film unit of the photovoltaic thin film layer in the flexible packaging film with the photovoltaic characteristic can be connected with the electrode lug of the battery cell, so that the electric energy is transferred from the flexible packaging film with the photovoltaic characteristic to the battery cell.
Specifically, after the N photovoltaic thin film units of the photovoltaic thin film layer are connected with each other, a first electrode and a second electrode of the flexible encapsulation film with photovoltaic characteristics are formed, wherein the first electrode may be connected with a first tab of the battery cell through a first wire, and the second electrode may be connected with a second tab of the battery cell through a second wire. The first electrode can be a positive electrode or a negative electrode, and correspondingly, when the first electrode is the positive electrode, the lug connected with the first electrode is a positive lug; when the first electrode is a negative electrode, the tab connected with the first electrode is a negative electrode tab;
the second electrode is opposite to the first electrode and can be a negative electrode or a positive electrode, and correspondingly, when the second electrode is a negative electrode, the lug connected with the second electrode is a negative electrode lug; when the second electrode is a positive electrode, the tab connected with the second electrode is a positive electrode tab.
In addition, the secondary battery of the present invention further includes a voltage transforming unit and/or a control unit.
The transformation unit is arranged on the surface of the insulating substrate and used for adjusting and stabilizing the input voltage of the flexible packaging film with the photovoltaic characteristic to the battery cell, so that the self-charging of the secondary battery under the normal working voltage is facilitated;
and the control unit is arranged on the surface of the insulating substrate and used for cutting off or communicating the transfer of the electric energy from the flexible packaging film with the photovoltaic characteristic to the battery cell.
The present invention is not limited to the type of secondary battery, and may be embodied as a sodium ion battery, a lithium solid state battery, a lithium sulfur battery, or the like, for example, by replacement of an electrolytic solution and a motor material.
For example, lithium cobaltate, lithium nickelate, lithium manganate, ternary nickel-cobalt-manganese material, ternary nickel-cobalt-aluminum material, lithium iron phosphate (LFP), lithium nickel manganate, lithium manganese rich-based material are selected as the positive electrode active material, at least one of artificial graphite, hard carbon, soft carbon is selected as the negative electrode material, and lithium difluorophosphate (LiPF) is selected as the negative electrode material2O2) Lithium difluorobis (oxalato) phosphate (LiDFOP), lithium hexafluorophosphate (LiPF)6) One or more of lithium bis (fluorosulfonyl) imide (LiFSI), lithium difluoro (oxalato) borate (liddob), lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) and lithium bis (oxalato) borate (LiBOB) are used as lithium salts in the electrolyte, and then the lithium ion battery with photovoltaic characteristics can be obtained after the flexible packaging film with photovoltaic characteristics is packaged.
In another aspect, the present invention also provides a dc power device comprising any of the secondary batteries described above.
Specifically, the secondary battery may be disposed at a portion near the outside of the dc power device, thereby facilitating the flexible encapsulation film having photovoltaic characteristics of the secondary battery to absorb sunlight and convert into electric energy, thereby realizing electric energy supply of the secondary battery to the dc power device.
The present invention is not limited to a specific type of dc power device, and may be any device that can be operated by supplying dc power. For example, it may be a mobile phone, a drone, a street lamp, a traffic signal lamp, an electric vehicle, and so on.
The dc electric device of the present invention uses the above-described secondary battery, and therefore, has excellent cruising ability and operation performance.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A flexible encapsulant film having photovoltaic properties, comprising: a photovoltaic film layer and a heat seal layer;
the photovoltaic thin film layer comprises N photovoltaic thin film units and an insulating substrate shared by the N photovoltaic thin film units, the insulating substrate covers the heat sealing layer, and N is larger than or equal to 1.
2. Flexible encapsulating film with photovoltaic properties according to claim 1, characterised in that the material of the insulating substrate is a polymer.
3. The flexible packaging film with photovoltaic properties of claim 1, wherein when N > 1, any two of the photovoltaic thin film units are in series or parallel relationship.
4. The flexible encapsulating film having photovoltaic properties as recited in claim 1, further comprising an encapsulating layer disposed between the photovoltaic thin film layer and the heat seal layer.
5. The flexible packaging film having photovoltaic properties according to claim 4, wherein the packaging layer is bonded between the photovoltaic thin film layer and the heat seal layer by an adhesive layer.
6. A secondary battery, characterized in that the secondary battery is obtained by encapsulating a cell with the flexible encapsulating film having photovoltaic characteristics according to any one of claims 1 to 5.
7. The secondary battery of claim 6, comprising a first wire and a second wire, wherein two ends of the first wire are respectively connected to the first electrode of the flexible packaging film and the first tab of the battery cell, and two ends of the second wire are respectively connected to the second electrode of the flexible packaging film and the second tab of the battery cell.
8. The secondary battery according to claim 6, further comprising a voltage transforming unit and/or a control unit.
9. The secondary battery according to any one of claims 6 to 8, wherein the secondary battery is a lithium ion battery.
10. A direct current electric device characterized in that it comprises the secondary battery according to any one of claims 6 to 9.
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Address after: 519180 No. 209 Pearl Peak Avenue, Jingan Town, Doumen District, Zhuhai City, Guangdong Province Applicant after: Zhuhai Guanyu Battery Co.,Ltd. Address before: 519180 No. 209 Pearl Peak Avenue, Jingan Town, Doumen District, Zhuhai City, Guangdong Province Applicant before: ZHUHAI COSLIGHT BATTERY Co.,Ltd. |
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Application publication date: 20200529 |