CN105529501A - Preparation method of thin lithium battery - Google Patents
Preparation method of thin lithium battery Download PDFInfo
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- CN105529501A CN105529501A CN201610039282.5A CN201610039282A CN105529501A CN 105529501 A CN105529501 A CN 105529501A CN 201610039282 A CN201610039282 A CN 201610039282A CN 105529501 A CN105529501 A CN 105529501A
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- active material
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- lithium battery
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- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a preparation method of a thin lithium battery. The method comprises the steps as follows: with a composite film formed by compounding a polymer film layer and a metal layer as a package current collecting film, the package current collecting film is used as a package material as well as an electrode current collector; an active electrode material can directly coat one side of the metal layer of the package current collecting film; the active electrode material comprises a positive active material and a negative active material; a membrane is added between the positive active material and the negative active material to form the thin-film battery; and finally, gluing and sealing are carried out by the methods of a hot melt adhesive and the like to form the thin battery. The preparation method of the thin lithium battery has the advantages that the thickness of the battery prepared by the existing method can be further reduced and the problem of crimping of a single-sided electrode can be solved or relieved.
Description
Technical field
The present invention relates to cell art, particularly relate to a kind of preparation method of thin type lithium battery.
Background technology
Along with miniaturization, the slimming of electronic equipment, and a large amount of appearance of wearable device, the demand of the slimming of lithium battery shape, flexibility also gets more and more, in order to realize the slimming of lithium battery, the simplest method is exactly select both positive and negative polarity pole piece and the conventional separator of slim one side, prepare the laminated battery plate be made up of monolithic one side positive pole, single-layer septum and monolithic one side negative pole, select thinner encapsulating material, to reduce battery general thickness simultaneously.
The gross thickness of battery determined by the thickness sum of both sides encapsulating material, anode pole piece, cathode pole piece and barrier film, by the constraint of battery capacity, usual both positive and negative polarity pole piece must meet certain thickness, and other non-active material, comprise encapsulating material, both positive and negative polarity collector, diaphragm material, then determined by its existing commercial prod gauge.Encapsulating material thickness is at about 50um ~ 100um, and collector is at about 10um, and diaphragm material is at about 20um, and battery both sides encapsulating material gross thickness is about 100um ~ 200um, accounts for most of thickness of non-active material.Current the most frequently used encapsulating material is aluminum plastic film, and it is generally 3-layer composite material, and both sides are polymeric material, and wherein outside is generally wear-resisting, the good polymeric material of toughness, as nylon; And inner side is generally the materials such as polypropylene, play the effect of insulation; Be layer of metal foil, normally aluminium foil in inside and outside two-layer centre, mainly play the effect of water proof, trapping body.
Meanwhile, in practical operation, due to collector both sides Stress non-homogeneity, there is the problem of easily curling in the positive and negative pole material of one side, and this brings difficulty to the preparation process of battery.
Summary of the invention
The object of the invention is to the preparation method that a kind of thin type lithium battery is provided for the deficiencies in the prior art, the preparation method of this thin type lithium battery both can reduce the thickness of battery prepared by existing method further, can solve or alleviate again the curling problem that single-side electrode exists.
For achieving the above object, the present invention is achieved through the following technical solutions.
A preparation method for thin type lithium battery, include adopt polymer film and metal level to be compounded to form composite membrane as encapsulating afflux film, this encapsulation afflux film had not only used as encapsulating material but also as electrode current collecting body; Electrode active material directly can be coated in the metal level side of encapsulation afflux film; Electrode active material includes positive active material and negative electrode active material, adds that barrier film forms hull cell between positive active material and negative electrode active material, finally forms thin battery with the gluing sealing of the methods such as PUR.
Wherein, the material of described polymer film is polyethylene, polyvinyl chloride, polypropylene, nylon, polyurethane, poly-imines, polyimides, polystyrene or polyester (PET), its thickness range is 5um ~ 50um, is preferably 10 ~ 30um, more optimizedly 15 ~ 25um.
Wherein, described metal level is metal forming, and this metal forming by hot pressing or cold pressing mode and polymer film compound, and forms encapsulation afflux composite membrane, and the thickness range of metal level is 5um ~ 50um, is preferably 6 ~ 20um, more optimizedly 8 ~ 15um.
Wherein, described metal level is metal film, and the method that this metal film is deposited by physical vacuum obtains, and comprise the method such as thermal evaporation, sputtering and obtain, the thickness range of metal level is 0.1um ~ 10um, is preferably 0.5 ~ 5um, more optimizedly 1 ~ 3um.
Wherein, during described metal level coating positive active material, this metal level is one or more the alloy material in Al, Ni, stainless steel, Ti, Mo, Cu and ITO; During described metal level coating negative electrode active material, this metal level is one or more the alloy material in Cu, Ni, stainless steel, Ti, Mo and Zn.
Wherein, positive active material and negative electrode active material directly apply or spray to metal level side and form anode pole piece and the cathode pole piece of battery respectively.
Wherein, described metal level is connected with the lug of thin battery or the lug of making thin battery uses.
Wherein, the edge of the metal level side of described encapsulation afflux film will reserve certain seal widths, is realized the sealing of thin battery by PUR or other glue bond, and seal widths, at 1mm ~ 10mm, is preferably 2mm ~ 5mm.
Beneficial effect of the present invention is: the preparation method of a kind of thin type lithium battery of the present invention, include adopt polymer film and metal level to be compounded to form composite membrane as encapsulating afflux film, this encapsulation afflux film had not only used as encapsulating material but also as electrode current collecting body; Electrode active material directly can be coated in the metal level side of encapsulation afflux film; Electrode active material includes positive active material and negative electrode active material, between positive active material and negative electrode active material, add that barrier film forms hull cell, finally form thin battery with the gluing sealing of the methods such as PUR, the present invention has the thickness that can reduce battery prepared by existing method further, can solve or alleviate again the advantage of the curling problem that single-side electrode exists.
Accompanying drawing explanation
Utilize accompanying drawing to be further detailed the present invention below, but the embodiment in accompanying drawing does not form any limitation of the invention.
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with concrete execution mode, the present invention will be described.
As shown in Figure 1, a kind of preparation method of thin type lithium battery, include adopt polymer film 11 and metal level 12 to be compounded to form composite membrane as encapsulating afflux film 1, this encapsulation afflux film had not only used as encapsulating material but also as electrode current collecting body; Electrode active material 2 directly can be coated in metal level 12 side of encapsulation afflux film 1; Electrode active material 2 includes positive active material 21 and negative electrode active material 22, between positive active material 21 and negative electrode active material 22, add that barrier film 3 forms hull cell, finally form thin battery with the gluing sealing of the methods such as PUR, three-decker encapsulating film traditional in battery can be added the four-layer structure of one deck collector by the present invention again, be reduced to the two-layer structure of encapsulation afflux film, thus effectively reduce the thickness of battery; On the other hand, that compares that conventional method coat activated material on metal torrent body produces is curling, in the present invention, metal level is after coat activated material, because the polymer film outside metal level exists, can well prevent or slow down the crimp that electrode occurs, be conducive to the processing preparation of battery.
Further, the material of described polymer film 11 is polyethylene, polyvinyl chloride, polypropylene, nylon, polyurethane, poly-imines, polyimides, polystyrene or polyester (PET), its thickness range is 5um ~ 50um, preferably 10 ~ 30um, more optimizedly 15 ~ 25um, the effect of described polymer film 11 is metal levels 12 of protection inner side, plays cell sealing effect simultaneously; This polymer film 11 has good resistance to wear and good toughness.
Further, described metal level 12 is metal forming, this metal forming is by hot pressing or cold pressing mode and polymer film 12 compound, and forming encapsulation afflux composite membrane 1, the thickness range of metal level 12 is 5um ~ 50um, is preferably 6 ~ 20um, more optimizedly 8 ~ 15um, described metal level 12 1 aspect can play the effect blocking air and moisture and spread to inside battery, is used by the collector as electrode on the other hand, and it is surperficial that active material will be applied directly to metal level 12.
Further, described metal level 12 is metal film, and the method that this metal film is deposited by physical vacuum obtains, and comprise the method such as thermal evaporation, sputtering and obtain, the thickness range of metal level 12 is 0.1um ~ 10um, is preferably 0.5 ~ 5um, more optimizedly 1 ~ 3um.
Further, when described metal level 12 applies positive active material 21, this metal level 12 is one or more the alloy material in Al, Ni, stainless steel, Ti, Mo, Cu and ITO; During described metal level (12) coating negative electrode active material 22, this metal level 12 is one or more the alloy material in Cu, Ni, stainless steel, Ti, Mo and Zn, to ensure electrochemistry and the chemical stability of metal level 12 pairs of positive active materials 21 or negative electrode active material 22.。
Further, positive active material 21 and negative electrode active material 22 directly apply or spray to metal level 12 side and form anode pole piece and the cathode pole piece of battery respectively.
Further, described metal level 12 is connected with the lug of thin battery or the lug of making thin battery uses.
Further, the edge of metal level 12 side of described encapsulation afflux film 1 will reserve certain seal widths, the sealing of thin battery is realized by PUR or other glue bond, seal widths is at 1mm ~ 10mm, preferably 2mm ~ 5mm, wherein the present embodiment is preferred, and PUR can select epoxy resin, polyethylene, polypropylene, polyurethane, thermoplastic polyurethane, silica resin, acryl resin or UV cured glue.
Embodiment 1
The polymer film 11 of encapsulation afflux film 1 is nylon, and its thickness is 30um, and the metal level 12 of encapsulation afflux film 1 is metal forming, by hot pressing mode and polymer film 11 compound, forms afflux encapsulated layer composite membrane.The metal forming of positive pole one side packing afflux film 1 is aluminium foil, and thickness is 15um; The metal forming of negative pole one side packing afflux film 1 is Copper Foil, and thickness is 10um;
The positive active material 21(cobalt acid lithium of thin type lithium battery) and negative electrode active material 22(Delanium), in cell manufacturing process, directly metal level 12 side of coating encapsulation afflux film 1, form anode pole piece and the cathode pole piece of battery respectively, according to the designing requirement of battery, determine the indexs such as the shape of negative or positive electrode active material, thickness, density, the lug of thin battery is connected with metal level 12 spot welding of encapsulation afflux film 1; The edge of metal level 12 side realizes battery seal by PUR, the general 5mm of seal widths, and PUR selects polypropylene glue, adopts said process, can obtain thin type lithium battery.
Embodiment 2
The polymer film 11 of encapsulation afflux film 1 selects polyimides, thickness 25um, and the metal level 12 of encapsulation afflux film 1 is metal forming, by the mode of colding pressing and polymer film 11 compound, form encapsulation afflux composite membrane, the metal forming 12 of positive pole one side packing afflux film 1 is stainless steel foil, and thickness is 20um; The metal forming 12 of negative pole one side packing afflux film 1 is Ti paper tinsel, and thickness is 30um;
The positive active material 21(cobalt acid lithium of thin type lithium battery) and negative electrode active material 22(Delanium), in cell manufacturing process, by metal level 12 side of spray gun spraying to encapsulation afflux film 1, form anode pole piece and the cathode pole piece of battery respectively, according to the designing requirement of battery, determine the indexs such as the shape of negative or positive electrode active material, thickness, density; The lug of thin battery is connected with metal level 12 spot welding of encapsulation afflux film 1; The edge of metal level 12 side of encapsulation afflux film 1 realizes battery seal by PUR, seal widths 8mm, and PUR is acryl resin glue; Adopt said process, thin type lithium battery can be obtained.
Embodiment 3
The polymer film 11 of encapsulation afflux film 1 selects polypropylene, thickness 30um, and the metal level 12 of encapsulation afflux film 1 is metal film, and this metal film is obtained by vacuum thermal evaporation methods; The metal forming of positive pole one side packing afflux film 1 is molybdenum film, and thickness is 3um; The metal forming of negative pole one side packing afflux film 1 is Copper Foil, and thickness is 5um; The positive active material 21 of thin type lithium battery and negative electrode active material 22, in cell manufacturing process, directly be coated to metal level 12 side of encapsulation afflux film 1, form anode pole piece and the cathode pole piece of battery respectively, according to the designing requirement of battery, determine the indexs such as the shape of negative or positive electrode active material, thickness, density; The lug of thin battery directly uses using metal level as lug, and the edge of metal level 12 side of encapsulation afflux film 1 realizes battery seal by PUR, seal widths 10mm, and PUR is polyethylene glue; Adopt said process, thin type lithium battery can be obtained.
Embodiment 4
The polymer film 11 of encapsulation afflux film 1 selects poly-imines, thickness 50um, and the metal level 12 of encapsulation afflux film 1 is metal film, and this metal film 12 is obtained by vacuum sputtering forwarding method; The metal forming of positive pole one side packing afflux film 1 is nickel film, and thickness is 1um; The metal forming of negative pole one side packing afflux film 1 is molybdenum foil, and thickness is 0.5um;
The positive active material 21 of thin type lithium battery and negative electrode active material 22, in cell manufacturing process, spray gun spraying is utilized to arrive metal level 12 side of encapsulation afflux film 1, form anode pole piece and the cathode pole piece of battery respectively, according to the designing requirement of battery, determine the indexs such as the shape of negative or positive electrode active material, thickness, density; The lug of thin battery directly uses using metal level as lug, and the edge of metal level 12 side of encapsulation afflux film 1 realizes battery seal by PUR, and seal widths is 3mm, and PUR is UV cured glue; Adopt said process, thin type lithium battery can be obtained.
Above content is only preferred embodiment of the present invention, and for those of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, this description should not be construed as limitation of the present invention.
Claims (8)
1. the preparation method of a thin type lithium battery, it is characterized in that: include adopt polymer film (11) to be compounded to form with metal level (12) composite membrane as encapsulating afflux film (1), this encapsulation afflux film had not only used as encapsulating material but also as electrode current collecting body; Electrode active material (2) directly can be coated in metal level (12) side of encapsulation afflux film (1); Electrode active material (2) includes positive active material (21) and negative electrode active material (22), between positive active material (21) and negative electrode active material (22), add that barrier film (3) forms hull cell, finally form thin battery with the gluing sealing of the methods such as PUR.
2. the preparation method of a kind of thin type lithium battery according to claim 1, it is characterized in that: the material of described polymer film (11) is polyethylene, polyvinyl chloride, polypropylene, nylon, polyurethane, poly-imines, polyimides, polystyrene or polyester (PET), its thickness range is 5um ~ 50um, preferably 10 ~ 30um, more optimizedly 15 ~ 25um.
3. the preparation method of a kind of thin type lithium battery according to claim 1, it is characterized in that: described metal level (12) is metal forming, this metal forming is by hot pressing or cold pressing mode and polymer film (12) compound, and form encapsulation afflux composite membrane (1), the thickness range of metal level (12) is 5um ~ 50um, preferably 6 ~ 20um, more optimizedly 8 ~ 15um.
4. the preparation method of a kind of thin type lithium battery according to claim 1, it is characterized in that: described metal level (12) is metal film, the method that this metal film is deposited by physical vacuum obtains, comprise the method such as thermal evaporation, sputtering to obtain, the thickness range of metal level (12) is 0.1um ~ 10um, preferably 0.5 ~ 5um, more optimizedly 1 ~ 3um.
5. the preparation method of a kind of thin type lithium battery according to claim 1, it is characterized in that: during described metal level (12) coating positive active material (21), this metal level (12) is Al, Ni, stainless steel, one or more alloy material in Ti, Mo, Cu and ITO; During described metal level (12) coating negative electrode active material (22), this metal level (12) is Cu, Ni, stainless steel, one or more alloy material in Ti, Mo and Zn.
6. the preparation method of a kind of thin type lithium battery according to claim 1, is characterized in that: positive active material (21) and negative electrode active material (22) directly apply or spray to metal level (12) side and form anode pole piece and the cathode pole piece of battery respectively.
7. the preparation method of a kind of thin type lithium battery according to claim 1, is characterized in that: described metal level (12) is connected with the lug of thin battery or the lug of making thin battery uses.
8. the preparation method of a kind of thin type lithium battery according to claim 1, it is characterized in that: the edge of metal level (12) side of described encapsulation afflux film (1) will reserve certain seal widths, the sealing of thin battery is realized by PUR or other glue bond, seal widths, at 1mm ~ 10mm, is preferably 2mm ~ 5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610039282.5A CN105529501A (en) | 2016-01-21 | 2016-01-21 | Preparation method of thin lithium battery |
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| CN201610039282.5A CN105529501A (en) | 2016-01-21 | 2016-01-21 | Preparation method of thin lithium battery |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106784993A (en) * | 2016-12-29 | 2017-05-31 | 中国电子科技集团公司第十八研究所 | Flexible polymer thin lithium ion battery and preparation method thereof |
| CN108023120A (en) * | 2018-01-09 | 2018-05-11 | 清陶（昆山）能源发展有限公司 | A kind of flexible lithium ion battery encapsulating material and its packaging technology |
| CN108365271A (en) * | 2018-03-23 | 2018-08-03 | 清陶（昆山）能源发展有限公司 | A kind of integrated flexible solid lithium ion battery and preparation method thereof |
| CN108735960A (en) * | 2018-07-06 | 2018-11-02 | 惠州赛尔雷新能源科技有限公司 | A kind of ultra-thin lithium cell and production method |
| WO2019062373A1 (en) * | 2017-09-29 | 2019-04-04 | 辉能科技股份有限公司 | Flexible battery |
| CN110392946A (en) * | 2017-10-25 | 2019-10-29 | 株式会社Lg化学 | There is the reduced single-side electrode of distortion and preparation method thereof for secondary cell |
| WO2020006967A1 (en) * | 2018-07-06 | 2020-01-09 | 惠州赛尔雷新能源科技有限公司 | Tab-free solid lithium battery |
| CN112968179A (en) * | 2021-02-04 | 2021-06-15 | 珠海冠宇电池股份有限公司 | Current collector composite film and solid-state battery |
| CN115275458A (en) * | 2022-07-22 | 2022-11-01 | 深圳新源柔性科技有限公司 | Flip thin-film battery and preparation method thereof |
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| CN108735960A (en) * | 2018-07-06 | 2018-11-02 | 惠州赛尔雷新能源科技有限公司 | A kind of ultra-thin lithium cell and production method |
| WO2020006967A1 (en) * | 2018-07-06 | 2020-01-09 | 惠州赛尔雷新能源科技有限公司 | Tab-free solid lithium battery |
| CN112968179A (en) * | 2021-02-04 | 2021-06-15 | 珠海冠宇电池股份有限公司 | Current collector composite film and solid-state battery |
| CN115275458A (en) * | 2022-07-22 | 2022-11-01 | 深圳新源柔性科技有限公司 | Flip thin-film battery and preparation method thereof |
| CN115275458B (en) * | 2022-07-22 | 2023-11-21 | 深圳新源柔性科技有限公司 | Flip film battery and preparation method thereof |
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