WO2002043178A1 - Polymer electrolyte battery and method of producing same - Google Patents
Polymer electrolyte battery and method of producing same Download PDFInfo
- Publication number
- WO2002043178A1 WO2002043178A1 PCT/JP2001/010183 JP0110183W WO0243178A1 WO 2002043178 A1 WO2002043178 A1 WO 2002043178A1 JP 0110183 W JP0110183 W JP 0110183W WO 0243178 A1 WO0243178 A1 WO 0243178A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polymer electrolyte
- battery
- battery element
- heater block
- flat
- Prior art date
Links
- 239000005518 polymer electrolyte Substances 0.000 title claims abstract description 150
- 238000000034 method Methods 0.000 title claims description 23
- 238000004804 winding Methods 0.000 claims description 67
- 238000004519 manufacturing process Methods 0.000 claims description 45
- 229920000642 polymer Polymers 0.000 claims description 19
- 239000005001 laminate film Substances 0.000 claims description 12
- 239000003792 electrolyte Substances 0.000 claims description 11
- 239000011245 gel electrolyte Substances 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 10
- 229920002379 silicone rubber Polymers 0.000 claims description 8
- 239000000203 mixture Substances 0.000 description 18
- 239000007773 negative electrode material Substances 0.000 description 15
- 239000007774 positive electrode material Substances 0.000 description 13
- 239000002904 solvent Substances 0.000 description 10
- 239000011230 binding agent Substances 0.000 description 8
- 229910052744 lithium Inorganic materials 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 7
- 239000004020 conductor Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 238000010030 laminating Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 239000003125 aqueous solvent Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 5
- 239000011255 nonaqueous electrolyte Substances 0.000 description 5
- 239000004014 plasticizer Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000002033 PVDF binder Substances 0.000 description 4
- -1 for example Substances 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 229910052723 transition metal Inorganic materials 0.000 description 3
- XFCMNSHQOZQILR-UHFFFAOYSA-N 2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOC(=O)C(C)=C XFCMNSHQOZQILR-UHFFFAOYSA-N 0.000 description 2
- KUDUQBURMYMBIJ-UHFFFAOYSA-N 2-prop-2-enoyloxyethyl prop-2-enoate Chemical compound C=CC(=O)OCCOC(=O)C=C KUDUQBURMYMBIJ-UHFFFAOYSA-N 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000007606 doctor blade method Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229920006280 packaging film Polymers 0.000 description 2
- 239000012785 packaging film Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- FWWXYLGCHHIKNY-UHFFFAOYSA-N 2-ethoxyethyl prop-2-enoate Chemical compound CCOCCOC(=O)C=C FWWXYLGCHHIKNY-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- JRLTTZUODKEYDH-UHFFFAOYSA-N 8-methylquinoline Chemical compound C1=CN=C2C(C)=CC=CC2=C1 JRLTTZUODKEYDH-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000006182 cathode active material Substances 0.000 description 1
- 230000009134 cell regulation Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- VUPKGFBOKBGHFZ-UHFFFAOYSA-N dipropyl carbonate Chemical compound CCCOC(=O)OCCC VUPKGFBOKBGHFZ-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
- CYEDOLFRAIXARV-UHFFFAOYSA-N ethyl propyl carbonate Chemical compound CCCOC(=O)OCC CYEDOLFRAIXARV-UHFFFAOYSA-N 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007849 furan resin Substances 0.000 description 1
- 229910021469 graphitizable carbon Inorganic materials 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical group 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229910021470 non-graphitizable carbon Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- RPQRDASANLAFCM-UHFFFAOYSA-N oxiran-2-ylmethyl prop-2-enoate Chemical compound C=CC(=O)OCC1CO1 RPQRDASANLAFCM-UHFFFAOYSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000006253 pitch coke Substances 0.000 description 1
- 229920003214 poly(methacrylonitrile) Polymers 0.000 description 1
- 229920005569 poly(vinylidene fluoride-co-hexafluoropropylene) Polymers 0.000 description 1
- 229920001197 polyacetylene Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920000131 polyvinylidene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- ARJOQCYCJMAIFR-UHFFFAOYSA-N prop-2-enoyl prop-2-enoate Chemical compound C=CC(=O)OC(=O)C=C ARJOQCYCJMAIFR-UHFFFAOYSA-N 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
- H01B1/122—Ionic conductors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
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- H—ELECTRICITY
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
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- H—ELECTRICITY
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- H01M10/058—Construction or manufacture
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
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- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
- H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
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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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M2004/025—Electrodes composed of, or comprising, active material with shapes other than plane or cylindrical
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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
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/04—Cells with aqueous electrolyte
- H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
- H01M6/10—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with wound or folded electrodes
- H01M2006/106—Elliptic wound cells
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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
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- H01M10/04—Construction or manufacture in general
- H01M2010/0495—Nanobatteries
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0082—Organic polymers
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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
- H01M2300/00—Electrolytes
- H01M2300/0085—Immobilising or gelification of electrolyte
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- H—ELECTRICITY
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
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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
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
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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
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/04—Cells with aqueous electrolyte
- H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
- H01M6/10—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with wound or folded electrodes
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- 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
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- 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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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
- Y10T29/49114—Electric battery cell making including adhesively bonding
Definitions
- the present invention relates to a polymer electrolyte battery including a battery element in which a positive electrode and a negative electrode are wound with a polymer electrolyte interposed therebetween, and a method for manufacturing the same.
- a polymer electrolyte battery including a battery element in which a positive electrode and a negative electrode are wound with a polymer electrolyte interposed therebetween, and a method for manufacturing the same.
- portable electronic devices have become smaller and lighter, batteries that supply power to these electronic devices have become smaller and thinner, irrespective of their use, such as driving and backup. Demands for weight reduction and the like are increasing.
- a battery that satisfies such demands is a non-aqueous battery that includes a positive electrode and a negative electrode having an active material capable of reversibly inserting and removing lithium ions, a non-aqueous electrolyte, and has advantages such as high output and high energy density.
- Water electrolyte batteries, so-called lithium batteries, have been developed and put into practical use. '
- lithium-based batteries containing a polymer electrolyte as a non-aqueous electrolyte are characterized by excellent leakage resistance and high safety.
- lithium-based batteries containing polymer electrolytes are lightweight and can be made thin, conventional batteries that can be designed in accordance with the shape and size of various electronic devices cannot be used. Has no features.
- a battery element is formed by interposing a polymer electrolyte between a thin sheet-shaped positive electrode and a thin sheet-shaped negative electrode, and the battery element is made of aluminum foil as a core. It is only necessary to use a laminating film as the material for the exterior.
- a portable electronic device 101 such as a mobile phone or a PDA
- a flat polymer electrolyte battery 102 when a flat polymer electrolyte battery 102 is incorporated in an internal space having a curved surface, the electronic device 101 A useless gap 103 is generated between the housing and the flat polymer electrolyte battery 102, and the internal space of the electronic device 101 cannot be used efficiently.
- the flat polymer electrolyte battery 102 has a flat battery element in which a polymer electrolyte is interposed between a thin sheet positive electrode and a thin sheet negative electrode. Even if the electrolyte battery 102 is curved, a desired curved shape cannot be maintained for a long time. In addition, the electrode active material layer may be cracked or peeled off from the current collector due to external force when the flat battery element is bent. For this reason, when the flat polymer electrolyte battery 102 is curved, there is a problem that the battery characteristics are significantly reduced.
- a battery element in which a positive electrode and a negative electrode are laminated with a polymer electrolyte interposed therebetween hereinafter, simply referred to as a flat battery element.
- a method is disclosed in which a flat battery element is bent by thermocompression bonding with two rolls of different diameters. According to this method, the curved shape of the battery element is maintained, but since the shear stress due to the different-diameter roll is applied between the active material layer and the current collector, the cell resistance and the like increase, and the end of the stack electrode ends. There is a problem that a short circuit easily occurs in the battery and stable battery performance cannot be obtained.
- a battery having a curved surface for example, a curved shape or a substantially semicircular shape, so as to adapt to the shape of the internal space of various electronic devices. Even so, it is an object of the present invention to provide a polymer electrolyte battery having a low possibility of electrode end short-circuiting and good battery characteristics, and a method for manufacturing the same.
- a polymer electrolyte battery of the present invention includes a battery element in which a positive electrode and a negative electrode are wound via a polymer electrolyte, and a cross section of the battery element perpendicular to a winding axis is curved. It is characterized by having a shape.
- the polymer electrolyte battery according to the present invention configured as described above has a battery element in which a positive electrode and a negative electrode are wound via a polymer electrolyte, and a cross section perpendicular to a winding axis has a curved shape.
- the curved shape may be a shape having a flat portion at least partially.
- the polymer electrolyte battery of the present invention includes a battery element in which a positive electrode and a negative electrode are wound via a polymer electrolyte, and a cross section perpendicular to a winding axis of the battery element has a substantially semicircular shape.
- the polymer electrolyte battery according to the present invention configured as described above has a battery element in which a positive electrode and a negative electrode are wound via a polymer electrolyte, and a cross section perpendicular to a winding axis has a substantially semicircular shape. Therefore, compared to a polymer electrolyte battery in which a flat battery element is curved, the possibility of short-circuiting at the electrode end is extremely low, and the battery has good battery characteristics. Further, in the polymer electrolyte battery of the present invention, the substantially semicircular substantially arc-shaped portion may have a shape having a flat portion at least in part.
- the method for producing a polymer electrolyte battery according to the present invention includes: a battery element forming step of forming a battery element formed by winding a positive electrode and a negative electrode through a polymer electrolyte; and a concave heater block having a curved concave surface.
- a battery element formed by winding an electrode and a negative electrode through a polymer electrolyte is thermocompression-bonded between a concave heater block and a convex heater block to be formed into a curved shape. Therefore, according to the method for producing a polymer electrolyte battery according to the present invention, while the production process is simple, the electrode interface bonding property is improved, and the curved shape can be maintained for a long period of time. It is possible to manufacture a polymer electrolyte battery in which the possibility of a short circuit is reduced and the battery characteristics are well maintained.
- the concave heater block having at least a part in the curved portion has a flat portion
- the convex heater block having at least a portion in the curved portion has a flat portion.
- the battery element may be thermocompression-bonded between them so that the cross section perpendicular to the winding axis of the battery element has a curved shape having a flat part at least in part.
- the method for producing a polymer electrolyte battery of the present invention includes: a battery element forming step of forming a battery element in which a positive electrode and a negative electrode are wound through a polymer electrolyte; and a concave heater block having a curved surface.
- a battery element formed by winding a positive electrode and a negative electrode with a polymer electrolyte interposed therebetween is formed by combining a concave heater block with a flat heater block. It is formed into a substantially semicircular shape by thermocompression bonding in between. Therefore, according to the method for producing a polymer electrolyte battery according to the present invention, while the production process is simple, the electrode interface bonding property is improved, and a substantially semicircular shape can be maintained for a long period of time. It is possible to manufacture a polymer electrolyte battery in which the possibility of partial short-circuit is reduced and the battery characteristics are well maintained.
- the four-type heater block having a flat portion in at least a part of the curved portion, and the flat-type heater book having a flat surface are described as follows.
- the battery element is thermocompression-bonded, and is shaped so that the cross section perpendicular to the winding axis of the battery element has a substantially semicircular shape and a flat portion in at least a part of the substantially arcuate portion. Good.
- FIG. 1 is a schematic sectional view showing an electronic device in which a flat polymer electrolyte battery is incorporated.
- FIG. 2 is a perspective view showing a polymer electrolyte battery provided with a battery element having a curved cross section perpendicular to the winding axis.
- FIG. 3 is a schematic view showing a flat battery element.
- FIG. 4 is a cross-sectional view of a main part showing a flat battery element.
- FIG. 5 is a schematic cross-sectional view showing an electronic device incorporating a polymer electrolyte battery including a battery element having a curved cross section perpendicular to the winding axis.
- FIG. 6 is a perspective view showing a battery element having a curved shape having a cross section perpendicular to the winding axis at least partially having a flat portion.
- FIG. 7 is a schematic diagram showing a state in which a flat battery element is inserted between the concave heater block and the convex heater block.
- FIG. 8 is a schematic diagram showing a state in which the concave heater block and the convex heater block are clamped.
- FIG. 9 is a schematic diagram showing a state in which the concave heater block and the convex heater block are half-opened.
- Fig. 10 shows a flat battery element inserted between a concave heater block having a flat flat portion in the center of a curved surface portion and a convex heater block having a flat flat portion in the center of the curved surface portion.
- FIG. 11 is a perspective view illustrating a polymer monoelectrolyte battery including a battery element having a cross section perpendicular to the winding axis having a substantially semicircular shape.
- FIG. 12 is a schematic cross-sectional view showing an electronic device in which a polymer-electrolyte battery including a battery element having a substantially semicircular cross section perpendicular to the winding axis is incorporated.
- FIG. 13 is a perspective view showing a battery element whose cross section perpendicular to the winding axis has a flat part at least partially in a substantially arc-shaped part.
- FIG. 14 is a schematic diagram showing a state where a flat battery element is inserted between the concave heater block and the flat heater block.
- FIG. 15 is a schematic diagram showing a state in which the concave heater block and the flat heater block are clamped.
- FIG. 16 is a schematic diagram showing a state where the DD type heater block and the flat type heater block are half-opened.
- FIG. 17 is a schematic diagram showing a state in which a flat battery element is inserted between a concave heater block having a flat flat portion in the center of a curved surface portion and a flat heater block. is there.
- BEST MODE FOR CARRYING OUT THE INVENTION hereinafter, embodiments of a polymer electrolyte battery according to the present invention will be described in detail with reference to the drawings.
- a battery element 2 a having a curved cross section perpendicular to the winding axis is covered with a laminate film 3 made of an insulating material or the like, and the pressure is reduced. It is sealed.
- the battery element 2a is obtained by winding a flat battery element 2b shown in FIG. 3 in which a positive electrode and a negative electrode are wound in a longitudinal direction via a polymer electrolyte layer, according to a molding method described later. It is formed so that the cross section perpendicular to is curved.
- the battery element 2 b includes both a positive electrode 6 in which a positive electrode active material layer 5 is formed on both main surfaces of a positive electrode current collector 4 and a negative electrode current collector 7.
- a polymer electrolyte layer 11 is provided.
- the battery element 2 b has a positive electrode terminal 13 made of aluminum or the like at one end of the positive electrode current collector 4, and a copper or nickel material at one end of the negative electrode current collector 7, as shown in FIG. Negative terminal used 1 4 Are formed respectively.
- the battery element 2 b is a battery element 2 a having a curved cross section perpendicular to the winding axis, and then leads the positive electrode terminal 13 and the negative electrode terminal 14 to the outside, It is housed in the above-mentioned laminator 3.
- the positive electrode current collector 4 aluminum, titanium, an alloy thereof, or the like can be used. Further, the shape of the positive electrode current collector 4 can be a foil-like glass shape, a punching metal shape, a net shape, or the like. The thickness of the positive electrode current collector 4 is preferably 20 m or less.
- the positive electrode active material layer 5 is formed by applying a positive electrode mixture slurry in which a positive electrode mixture containing a positive electrode active material, a conductive material and a binder is dispersed in a solvent, on both main surfaces of the positive electrode current collector 4. It was formed as a result.
- the positive electrode active material any of conventionally known positive electrode active material materials in this type of polymer electrolyte battery can be used, and for example, a composite oxide of lithium and a transition metal can be used.
- the transition metal element only one L i C o 0 2 and L i N I_ ⁇ 2, L i M n L i A 1 ⁇ 2 etc. or containing, containing a transition metal element 2 or more L i N i 5 C 0 s the OL i N i C o 2 0 2 , etc. can be used.
- the conductive material for example, a carbon material or the like can be used.
- the binder for example, polyvinylidene fluoride or the like can be used.
- the solvent for example, N-methylpyrrolidone or the like can be used.
- the negative electrode current collector 7 for example, copper or the like can be used. Further, the shape of the negative electrode current collector 7 can be a foil-like glass shape, a punching metal shape, a net shape, or the like.
- the negative electrode active material layer 8 is formed by applying a negative electrode mixture slurry obtained by dispersing a negative electrode mixture containing a negative electrode active material and a binder in a solvent on both main surfaces of the negative electrode current collector 7. It is a thing.
- any of the conventionally known negative electrode active material materials for this type of polymer electrolyte battery can be used, for example, a lithium metal, a lithium alloy, a material capable of doping / dedoping lithium, or the like is used. it can.
- a carbon material such as graphite, non-graphitizable carbon, and graphitizable carbon can be used.
- Cokes pitch coke, natural tasting, petroleum coke
- graphites graphites
- glassy carbons graphites
- organic polymer compound fired materials carbonized by firing phenolic resin or furan resin at an appropriate temperature
- Carbon fiber activated carbon and the like
- lithium as the doping / dedoping material capable, polymers such as polyacetylene and Poripi roll, the S n 0 2 oxides such like.
- a conductive material may be added to the negative electrode mixture as needed.
- a carbon material or the like can be used.
- the binder for example, polyvinylidene fluoride or the like can be used.
- the solvent for example, N-methylpyrrolidone and the like can be used.
- any polymer electrolyte used in this type of nonaqueous electrolyte battery can be used, but it has a heat-fusing property or a thermosetting property.
- a solid polymer electrolyte having high electrochemical stability or a gel electrolyte obtained by adding a plasticizer to the solid polymer electrolyte can be preferably used.
- the gel electrolyte contains a non-aqueous solvent, an electrolyte salt, and a matrix polymer.
- Non-aqueous solvents include carbonates such as ethylene carbonate, propylene carbonate, ⁇ -butyrolactone, dimethyl carbonate, getyl carbonate, ethyl methyl carbonate, dipropyl carbonate, ethyl propyl carbonate, and vinylene carbonate, and carbonates thereof.
- a solvent or the like in which hydrogen has been replaced with halogen can be used.
- These non-aqueous solvents may be used alone or in combination of two or more.
- electrolyte salt for example, L i PF s and L i C 1 L i CF 3 SO a, L i A s FL i BF 4, L i N (CF 3 SO a) 2, C 4 F 9 SO s L i etc. can be used.
- electrolyte salts may be used alone, or two or more of them may be used in combination.
- the matrix polymer a polymer capable of appropriately holding a non-aqueous electrolyte obtained by dissolving an electrolyte salt in a non-aqueous solvent and gelling the same is used.
- Specific matrix polymers include polyvinylidene fluoride-polyethylene oxide, polypropylene oxide Polymers containing repeating units such as amide, polyacrylonitrile, polymethacrylonitrile, and the like can be used, but are not limited thereto.
- a thermoplastic matrix polymer one type may be used alone, or two or more types may be used in combination.
- the matrix polymer a polymer obtained by crosslinking a monomer having one or more reactive unsaturated groups in a molecule in a non-aqueous electrolyte can be used.
- the monomer having a reactive unsaturated group include acrylic acid, methyl acrylate, ethoxyethyl acrylate, methoxetine acrylate, polyethylene glycol olenoacrylate, ethoxyxetyl methacrylate, and methoxethyl.
- Methacrylate, glycidyl acrylate, acrylyl acrylate, acrylonitrile, ethylene glycol diacrylate, triethylene glycol diatalylate, polyethylene glycol diatalylate, diethylene glycol dimethacrylate And the like, and those which are preferable from the viewpoint of reactivity and polarity can be used alone or in combination.
- the present invention is not limited to these.
- a method of polymerizing these monomers for example, a method using heat, ultraviolet rays, an electron beam, or the like can be adopted, but polymerization by heat, in which it is easy to integrally form the electrode layer / gel electrolyte layer, is most effective. Is
- separator 12 a porous polyolefin nonwoven fabric or the like can be used.
- the separator 12 it is preferable to appropriately insert the separator 12.
- the positive electrode 6 and the negative electrode 9 are wound via the polymer monoelectrolyte layers 10 and 11, and the cross section perpendicular to the winding axis has a curved shape. Since the battery element 2a is provided, compared to a conventional polymer electrolyte battery in which a flat battery element is curved, the possibility of electrode end short-circuiting is extremely low, and the battery has good battery characteristics.
- the polymer electrolyte battery 1 to which the present invention is applied as shown in FIG. 5, it is extremely easy to adapt the shape of the polymer electrolyte battery 1 to the shape of the internal space having the curved surface of the electronic device 20. As a result, the storage space efficiency of the polymer electrolyte battery 1 can be increased. As a result, the housing of electronic equipment and the The useless gap created between the battery and the electrolyte battery can be filled with the power generation element, which contributes to the diversification of the external shape of the electronic device 20 and the miniaturization thereof.
- the cross section perpendicular to the winding axis of the battery element 2b has a curved shape
- the present invention is not limited to this.
- the cross section perpendicular to the winding axis of the battery element 2c can be formed in a bay shape having at least a part with a flat portion 50.
- a manufacturing method for manufacturing the above-described polymer electrolyte battery 1 will be described.
- a battery element forming step of forming a flat battery element 2b is performed.
- the battery element 2b is thermocompression-bonded and molded, and a thermocompression molding step is performed to form the battery element 2a having a curved cross section perpendicular to the winding axis.
- a sealing step of packaging the battery element 2a with the laminate film 3 and sealing under reduced pressure is performed.
- the positive electrode 6 and the negative electrode 9 are wound around the polymer electrolyte layers 10 and 11 to form a flat battery element 2b.
- a positive electrode mixture obtained by uniformly mixing a positive electrode active material, a conductive material, and a binder is dispersed in a solvent to prepare a positive electrode mixture slurry.
- the positive electrode mixture slurry is uniformly applied on both surfaces of the positive electrode current collector 4 by, for example, a doctor blade method.
- the coating film in a wet state is dried at a high temperature to remove the solvent, and the positive electrode active material layer 5 is formed.
- a positive electrode terminal 13 is connected to one end of the positive electrode current collector 4 by spot welding, ultrasonic welding, or the like.
- the positive electrode terminal 13 preferably extends in the same direction as the negative electrode terminal 14, but may be in any direction as long as no short circuit or the like occurs and there is no problem in battery performance.
- the place of attachment and the method of attachment are not limited.
- a negative electrode mixture prepared by uniformly mixing a negative electrode active material and a binder is dispersed in a solvent to prepare a negative electrode mixture slurry.
- a conductive material may be added to the negative electrode mixture as needed.
- the negative electrode mixture slurry is uniformly applied on both surfaces of the negative electrode current collector 7 by, for example, a doctor blade method or the like.
- the wet coating film is dried at a high temperature to remove the solvent and form the negative electrode active material layer 8.
- the negative electrode terminal 14 is connected to one end of the negative electrode current collector 7 by spot welding or ultrasonic welding.
- the negative electrode terminal 14 is preferably in the same direction as the positive electrode terminal 13, but may be in any direction as long as no short circuit or the like occurs and there is no problem in battery performance. In addition, as long as the connection location of the negative electrode terminal 14 is in electrical contact, the location and method of attachment are not limited.
- a polymer electrolyte solution containing a solvent such as dimethyl carbonate, a plasticizer, and a matrix polymer is applied on the positive electrode active material layer 5 and the negative electrode active material layer 8, and dimethyl carbonate is vaporized and removed.
- the gel polymer electrolyte layers 10 and 11 are formed.
- the strip-shaped positive electrode 6 on which the polymer electrolyte layer 10 is formed and the strip-shaped negative electrode 9 on which the polymer electrolyte layer 11 is formed are wound in the longitudinal direction via the separator 12 to obtain a flat shape.
- the battery element 2b To obtain the battery element 2b.
- the battery element 2b is thermocompression-bonded between a concave heater block having a curved concave surface and a convex heater block having a curved convex surface, and is wound around the winding axis of the battery element 2b. It is formed so that the vertical cross section has a curved shape.
- thermocompression bonding the battery element 2b When thermocompression bonding the battery element 2b, first, as shown in FIG. 7, insert the flat battery element 2b between the concave heater block 21 and the convex heater block 22. . Next, as shown in FIG. 8, the concave heater block 21 and the convex heater block 22 are clamped, and the temperature and pressure of the heater blocks 21 and 22 are appropriately adjusted to perform thermocompression bonding.
- the concave heater block 21 and the convex heater block 22 are opened, and the battery element 2a formed so that the cross section perpendicular to the winding axis has a curved shape. Release mold.
- the battery element 2b As described above, by forming the flat battery element 2b by thermocompression bonding using the concave heater block 21 and the convex heater block 22, the battery element having a curved cross section perpendicular to the winding axis is formed. Get 2 a.
- the entire battery element 2b is thermocompression-bonded using the concave heater block 21 and the convex heater block 22 so that the cross section perpendicular to the winding axis has a curved shape.
- the battery element 2.a having a curved cross section perpendicular to the winding axis is sandwiched between the laminating films 3, and the outer periphery of the laminating film 3 is thermally fused under reduced pressure.
- the flat battery element 2 b formed by winding the positive electrode 6 and the negative electrode 9 via the polymer electrolyte layers 10 and 11 is formed into a concave heater block.
- the battery element 2b is thermocompression bonded using the convex heater block 22 and the battery element 2b is formed such that the cross section perpendicular to the winding axis has a curved shape. Therefore, according to the method of manufacturing the polymer electrolyte battery 1, the manufacturing process is simpler and the electrode interface bonding is simpler than in the case of manufacturing a conventional polymer electrolyte battery in which a flat battery element is curved.
- the polymer electrolyte battery 1 has improved battery performance, can maintain a curved shape in a cross section perpendicular to the winding axis for a long time, reduces the possibility of short-circuiting at the electrode end, and maintains good battery characteristics. Can be manufactured.
- the case where the battery element 2a formed so that the cross section perpendicular to the winding axis has a curved shape is covered with the laminate film 3 has been described.
- the invention is not limited to this, and after the flat battery element 2 b is externally sealed with the laminate film 3, it is inserted between the concave heater block 21 and the convex heater block 22. Alternatively, it may be formed by thermocompression in the same manner as described above.
- the battery element 2b is thermocompression-bonded between the concave heater book having the curved concave surface and the convex heater book having the curved convex surface.
- the present invention is not limited to this.
- a concave heater block 52 having a flat portion 51 in at least a part of a curved portion, and a convex heater having a flat portion 53 in at least a portion of a curved portion.
- the battery element may be thermocompression-bonded to the block 54.
- the battery element 2c obtained in this manner has a cross section perpendicular to the winding axis of the battery element 2c in a curved shape having a flat portion 50 at least partially.
- At least one of the concave heater block 52 and the convex heater block 54 (here, the concave heater block 52) is provided with a silicon rubber sheet 55 on the surface facing the battery element 2c. .
- the silicon rubber sheet 55 By arranging the silicon rubber sheet 55, heat and pressure can be uniformly applied to the battery element 2c.
- a battery element 32 a having a substantially semicircular cross section perpendicular to the winding axis is made of an insulating material or the like. And is sealed under reduced pressure.
- the polymer electrolyte battery 31 has the same configuration as the above-described polymer electrolyte battery 1 except that the polymer electrolyte battery 31 includes a battery element 32 a having a substantially semicircular cross section perpendicular to the winding axis. . Therefore, the same members as those of the above-described polymer electrolyte battery 1 are denoted by the same reference numerals, and description thereof is omitted.
- the positive electrode 6 and the negative electrode 9 are wound via the polymer electrolyte layers 10 and 11, and the cross section perpendicular to the winding axis is substantially semicircular. Since it has a battery element 32a, which has a shape, the possibility of electrode end short-circuiting is very low compared to a conventional polymer electrolyte battery in which a flat battery element is curved, and good battery characteristics are obtained. Have.
- the shape of the polymer electrolyte battery 31 is adapted to the shape of the internal space having the curved surface of the electronic device 40.
- the storage space efficiency of the polymer electrolyte battery 31 can be increased. As a result, it is possible to fill the useless gap, which has conventionally occurred between the housing of the electronic device and the flat polymer electrolyte battery, with the power generation element. Can contribute to
- the present invention is not limited to this.
- the cross section perpendicular to the winding axis of the battery element 32 c is substantially semicircular.
- the shape may be a shape having a flat portion 60 in at least a part of the substantially arc-shaped portion.
- a method of manufacturing the above-described polymer electrolyte battery 31 will be described.
- a battery element forming step of forming a flat battery element 32 b is performed.
- a thermocompression bonding step of thermocompression bonding the battery element 32b to form a battery element 32a having a substantially semicircular cross section perpendicular to the winding axis is performed.
- a sealing step is performed in which the battery element 32 a is packaged with the laminate film 3 and sealed under reduced pressure.
- the battery element forming step in the method for manufacturing the polymer electrolyte battery 31 is the same as the battery element forming step in the method for manufacturing the polymer battery 1 described above, and a description thereof will not be repeated.
- the battery element 32b is thermocompression-bonded between a concave heater block having a curved concave surface and a flat heater block having a flat surface, and the battery element 32b is wound around the winding axis of the battery element 32b. It is formed so that the vertical cross section has a substantially semicircular shape.
- thermocompression bonding the battery element 3 2b first, as shown in FIG. 14, a flat battery element 3 2b is placed between the concave heater block 41 and the flat heater block 42. Insert.
- the concave heater block 41 and the flat heater block 42 are clamped, and the temperature and pressure of the heater blocks 41 and 42 are appropriately adjusted to perform thermocompression bonding.
- the concave heater block 41 and the flat heater block 42 are opened, and the battery element 3 is formed so that the cross section perpendicular to the winding axis has a substantially semicircular shape. 2 Release a.
- the entire battery element 32b is thermocompression-bonded using the concave heater block 41 and the flat heater block 42, and the cross section perpendicular to the winding axis has a substantially semicircular shape. It has excellent electrode interface bonding properties, A favorable electrode / electrolyte interface is formed for the disintegrated battery 31, and a battery element 32a capable of maintaining a substantially semicircular shape for a long period of time can be obtained.
- the battery element 2a having a substantially semicircular cross section perpendicular to the winding axis is sandwiched between the laminating films 3, and the outer peripheral edge of the laminating film 3 is thermally fused under reduced pressure.
- the battery element 3 2b formed by winding the positive electrode 6 and the negative electrode 9 through the polymer electrolyte layers 10 and 11 is formed into a concave heater block.
- the battery element 32 b is thermocompression bonded using the flat heater block 42 and the flat heater block 42 so that the cross section perpendicular to the winding axis of the battery element 32 b has a substantially semicircular shape. Therefore, according to the method for producing the polymer electrolyte battery 31, the production process is simpler and the electrode is simpler than when a conventional polymer electrolyte battery in which a flat battery element is curved is produced.
- a polymer electrolyte that has good interfacial bonding properties can maintain a substantially semicircular shape in a cross section perpendicular to the winding axis for a long time, reduces the possibility of short-circuiting at the electrode end, and maintains good battery characteristics.
- Battery 31 can be manufactured.
- the present invention is not limited to this, and after the flat battery element 32 b is externally sealed with the laminating film 3, the recessed heater block 41 and the flat heater block 42 are connected to each other. It may be inserted between them and formed by thermocompression bonding in the same manner as described above.
- the battery element 32 a is thermally pressed between a concave heater block having a curved concave surface and a flat heater block, and the battery element 3 2
- the battery element is thermocompression-bonded between a concave heater block 62 having a flat portion 61 in at least a part of a curved portion and a flat heater block 63. Is also good.
- the battery element 32 c obtained in this manner has a substantially semicircular cross section perpendicular to the winding axis of the battery element 32 c, and at least a substantially arc-shaped portion.
- the shape has a flat portion 60 partially.
- a silicon rubber sheet 55 may be provided on one of the concave heater block 62 and the flat heater block 63 (here, the concave heater block 62) on the surface facing the battery element 32c. preferable. By disposing the silicon rubber sheet 64, heat and pressure can be uniformly applied to the battery element 32c.
- each component of the positive electrode mixture 3 weight and powdered graphite 5 parts by weight of L i C O_ ⁇ 2 as 9 2 parts by weight and a conductive material as a cathode active material, a powdery polyvinylidene fluoride as a binder And part.
- these components were dispersed in N-methylpyrrolidone to prepare a slurry-like positive electrode mixture.
- the positive electrode mixture thus prepared is uniformly applied to both sides of a positive electrode current collector made of aluminum foil (with a thickness of 20 m), and then dried under reduced pressure at 100 ° C for 24 hours. As a result, a positive electrode active material layer was formed. Next, the positive electrode active material layer was pressure-formed using a roll press to obtain a positive electrode sheet. Next, this positive electrode sheet was cut out to produce a belt-like positive electrode having a length of 50 mm and a width of 300 mm. Note that an aluminum ribbon as a positive electrode lead was welded to a portion of the positive electrode current collector where the positive electrode active material was not applied.
- each component of the negative electrode mixture 91 parts by weight of artificial graphite as a negative electrode active material and 9 parts by weight of polyvinylidene fluoride powder as a binder were weighed. Next, these components were dispersed in N-methylpyrrolidone to prepare a slurry-like negative electrode mixture.
- the negative electrode mixture prepared in this manner is uniformly applied to both sides of a negative electrode current collector made of copper foil (thickness: 15 ⁇ ), and then decompressed at 120 ° C for 24 hours. By drying, a negative electrode active material layer was formed. Next, the negative electrode active material layer was pressure-formed using a roll press to obtain a negative electrode sheet.
- this negative electrode sheet was cut out to produce a strip-shaped negative electrode having a length of 52 mm and a width of 320 mm.
- a nickel ribbon as a negative electrode lead was welded to a portion of the negative electrode current collector where the negative electrode active material was not applied.
- plasticizer First, weighed as each component of the plasticizer, and 4 2. 5 parts by weight of 4 2 propylene carbonate. 5 parts by weight of ethylene carbonate as the non-aqueous solvent, and L i PF 5 to 1 5 parts by weight as an electrolyte salt was. These components were mixed to prepare a plasticizer.
- each component of the polymer solution 30 parts by weight of a plasticizer, 10 parts by weight of poly (vinylidenefluoride-co-hexafluoropropylene), and 60 parts by weight of dimethyl carbonate were used. Weighed. Next, these components were mixed and dissolved to prepare a polymer electrolyte solution.
- the polymer electrolyte solution prepared in this manner After applying the polymer electrolyte solution prepared in this manner on the positive electrode active material on both surfaces of the positive electrode and on the negative electrode active material on both surfaces of the negative electrode, the polymer electrolyte solution is allowed to stand at room temperature for 8 hours to vaporize dimethyl carbonate. By removal, a gel electrolyte layer (having a thickness of 100 m) was formed.
- a belt-shaped positive electrode on which the gel electrolyte layer is formed and a belt-shaped negative electrode on which the gel electrolyte layer is formed are laminated via a separator made of porous polyolefin, and then wound in the longitudinal direction.
- a separator made of porous polyolefin made of porous polyolefin
- the flat battery element was sandwiched between outer packaging films, and the outer peripheral edge of the outer packaging film was heat-sealed under reduced pressure. As a result, the flat battery element was sealed in the exterior film.
- the exterior film a film in which an aluminum foil was sandwiched between a pair of polyolefin resin films was used.
- the flat battery element hermetically sealed in the outer film is then heated using a heat press equipped with a concave heater block and a convex heater block.
- C temperature environment A polymer electrolyte battery having a curved cross section perpendicular to the winding axis was obtained by performing thermocompression bonding at 10 kgf Zcm 2 for 5 minutes below.
- a flat battery element sealed in an exterior film is thermocompression-bonded using a heat press equipped with a concave hitch block and a flat heater block, and the cross section perpendicular to the winding axis is substantially semicircular.
- a polymer monoelectrolyte battery was produced in the same manner as in Example 1 except that the battery was molded so that
- a polymer electrolyte battery was fabricated in the same manner as in Example 1 except that the procedure was repeated.
- the flat battery element sealed in the outer film is thermocompression-bonded using a heat press equipped with a pair of flat heater blocks so that the cross section perpendicular to the winding axis becomes substantially rectangular.
- a polymer electrolyte battery was produced in the same manner as in Example 1 except for molding.
- Example 1 Each of the polymer monoelectrolyte batteries of Example 1, Example 2, and Comparative Example 1 produced as described above was subjected to a charge / discharge test to evaluate battery characteristics.
- this charge / discharge cycle was repeated 500 times, and the discharge capacity after 500 cycles was measured. Then, the ratio of the discharge capacity after 500 cycles to the initial discharge capacity was determined, and this was defined as the discharge capacity retention rate.
- Table 1 shows the above measurement results.
- the polymer electrolyte batteries of Examples 1 to 4 have the same high discharge capacity and excellent cycle characteristics as the polymer electrolyte battery of Comparative Example 1.
- a flat battery element in which a positive electrode and a negative electrode are wound via a polymer electrolyte is thermocompression-bonded by the above-described heat press machine, and is perpendicular to the winding axis. It was found that even when the battery element was formed into an innovative shape having a curved or substantially semicircular cross section, the battery characteristics were maintained well.
- Industrial applicability The polymer electrolyte battery of the present invention has a battery element in which a positive electrode and a negative electrode are wound via a polymer electrolyte, and has a battery element whose cross section perpendicular to the winding axis has a curved shape. As compared with the polymer electrolyte battery, the possibility of short-circuiting at the electrode end is very low, and the battery has good battery characteristics.
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Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2002544803A JP4175111B2 (ja) | 2000-11-21 | 2001-11-21 | ポリマー電解質電池およびその製造方法 |
EP01997863.4A EP1244169B1 (en) | 2000-11-21 | 2001-11-21 | Method of producing a polymer electrolyte battery |
US10/181,504 US7163762B2 (en) | 2000-11-21 | 2001-11-21 | Polymer electrolyte battery and method of producing same |
US11/556,108 US7704633B2 (en) | 2000-11-21 | 2006-11-02 | Polymer electrolyte battery |
Applications Claiming Priority (2)
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JP2000354871 | 2000-11-21 | ||
JP2000-354871 | 2000-11-21 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/556,108 Division US7704633B2 (en) | 2000-11-21 | 2006-11-02 | Polymer electrolyte battery |
Publications (1)
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WO2002043178A1 true WO2002043178A1 (en) | 2002-05-30 |
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Family Applications (1)
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PCT/JP2001/010183 WO2002043178A1 (en) | 2000-11-21 | 2001-11-21 | Polymer electrolyte battery and method of producing same |
Country Status (7)
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US (2) | US7163762B2 (ja) |
EP (1) | EP1244169B1 (ja) |
JP (1) | JP4175111B2 (ja) |
KR (1) | KR100833808B1 (ja) |
CN (1) | CN1269253C (ja) |
TW (1) | TW529190B (ja) |
WO (1) | WO2002043178A1 (ja) |
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US7163762B2 (en) | 2007-01-16 |
EP1244169A4 (en) | 2005-11-09 |
EP1244169A1 (en) | 2002-09-25 |
KR100833808B1 (ko) | 2008-05-30 |
US20070059595A1 (en) | 2007-03-15 |
KR20020077388A (ko) | 2002-10-11 |
US7704633B2 (en) | 2010-04-27 |
JP4175111B2 (ja) | 2008-11-05 |
EP1244169B1 (en) | 2018-01-03 |
JPWO2002043178A1 (ja) | 2004-04-02 |
US20030108787A1 (en) | 2003-06-12 |
CN1395750A (zh) | 2003-02-05 |
TW529190B (en) | 2003-04-21 |
CN1269253C (zh) | 2006-08-09 |
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