WO2014147808A1 - フィルム外装電池の検査方法 - Google Patents
フィルム外装電池の検査方法 Download PDFInfo
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- WO2014147808A1 WO2014147808A1 PCT/JP2013/058265 JP2013058265W WO2014147808A1 WO 2014147808 A1 WO2014147808 A1 WO 2014147808A1 JP 2013058265 W JP2013058265 W JP 2013058265W WO 2014147808 A1 WO2014147808 A1 WO 2014147808A1
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- WIPO (PCT)
- Prior art keywords
- inspection
- film
- exterior body
- clad battery
- power generation
- Prior art date
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- 238000007689 inspection Methods 0.000 title claims abstract description 141
- 238000000034 method Methods 0.000 title claims description 26
- 229910052751 metal Inorganic materials 0.000 claims abstract description 37
- 239000002184 metal Substances 0.000 claims abstract description 37
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 239000003792 electrolyte Substances 0.000 claims abstract description 9
- 238000009413 insulation Methods 0.000 claims description 66
- 238000010248 power generation Methods 0.000 claims description 38
- 239000005001 laminate film Substances 0.000 claims description 26
- 230000007547 defect Effects 0.000 claims description 25
- 239000008151 electrolyte solution Substances 0.000 claims description 13
- 229920003002 synthetic resin Polymers 0.000 claims description 8
- 239000000057 synthetic resin Substances 0.000 claims description 8
- 238000010030 laminating Methods 0.000 claims description 5
- 239000010410 layer Substances 0.000 description 45
- 230000002950 deficient Effects 0.000 description 27
- 239000000047 product Substances 0.000 description 16
- 239000000523 sample Substances 0.000 description 9
- 239000011888 foil Substances 0.000 description 8
- -1 polyethylene Polymers 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- 239000007774 positive electrode material Substances 0.000 description 5
- 230000032683 aging Effects 0.000 description 4
- 239000007773 negative electrode material Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- LRUUNMYPIBZBQH-UHFFFAOYSA-N Methazole Chemical group O=C1N(C)C(=O)ON1C1=CC=C(Cl)C(Cl)=C1 LRUUNMYPIBZBQH-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 239000012793 heat-sealing layer Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 229910014689 LiMnO Inorganic materials 0.000 description 1
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000002482 conductive additive Substances 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910021469 graphitizable carbon Inorganic materials 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 229910021470 non-graphitizable carbon Inorganic materials 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- G—PHYSICS
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- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/3865—Arrangements for measuring battery or accumulator variables related to manufacture, e.g. testing after manufacture
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/129—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of components or parts made of semiconducting materials; of LV components or parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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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
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4214—Arrangements for moving electrodes or electrolyte
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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
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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
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
- H01M50/557—Plate-shaped terminals
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/564—Terminals characterised by their manufacturing process
- H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
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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
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- 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
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Definitions
- the present invention relates to a flat film-clad battery having a laminate film as an exterior body, and more particularly to an inspection method for inspecting an insulation state between an electrode of an internal power generation element and a metal layer of the laminate film.
- a flat-shaped film that uses a laminated film with a synthetic resin layer laminated on the surface of a metal layer as an exterior body, and houses a power generation element formed by laminating a plurality of positive plates, negative plates, and separators together with an electrolyte.
- An exterior battery is known (Patent Documents 1 and 2).
- Patent Document 2 discloses a metal terminal and an exterior that are derived from the joint surface of the exterior body after completion of the film-clad battery configured as a lithium-ion battery. It is disclosed to inspect the insulation between the body metal layers.
- an impulse voltage is applied between a metal terminal and a metal layer of the exterior body after the power generation element is accommodated in the exterior body made of a laminate film and the periphery of the metal terminal is heat-sealed (before the electrolytic solution is filled). Is applied to perform a first insulation failure inspection, and after filling the electrolyte and completely seal the exterior body, an impulse voltage is similarly applied to perform a second insulation failure inspection.
- the direction perpendicular to the main surface of the outer package ie, the laminating direction of the positive electrode plate, etc.
- pressure may be applied during transportation after completion of individual film-clad batteries or during handling when assembling as a battery module. Since the exterior body made of a laminate film has flexibility, it may be bent and deformed by such an external force, and the internal power generation element may be compressed in the stacking direction.
- An object of the present invention is to perform a more reliable insulation defect inspection for a film-covered battery.
- a power generation element formed by laminating a positive electrode plate and a negative electrode plate via a separator is housed together with an electrolyte in an exterior body made of a laminate film in which a synthetic resin layer is laminated on at least an inner surface of a metal layer,
- a method for inspecting a flat film-clad battery in which the outer package is sealed in a state in which a terminal is led out The exterior body is pressurized from the outside along the stacking direction of the power generation elements, and in this pressurized state, an insulation failure inspection is performed between the terminal and the metal layer.
- insulation failure may occur.
- the insulation failure between the terminal and the metal layer is inspected in a pressurized state in which the exterior body is pressurized from the outside, such a defective product can be found and eliminated in advance.
- the surface of the exterior body is divided into a plurality of regions in a plan view along the stacking direction, and each region is pressurized, and the insulation failure inspection is performed in each pressurized state. Do. In this way, the number of inspections for insulation failure corresponding to the number of divided areas is required, but the exterior body having flexibility is partially pressed, so that the exterior body becomes an internal power generation element. It is possible to obtain a state of being reliably pressed against, and to conduct an insulation defect inspection that approximates the actual battery usage.
- the total sum of the pressure areas at each time includes at least the entire range of the exterior body covering the power generation element. . That is, the insulation failure is inspected in a state where each part in the range of the exterior body covering the power generation element is pressurized at least once.
- the method for inspecting a film-clad battery of the present invention comprises: The film-clad battery filled with the electrolyte and sealed with the exterior body is transported to the first inspection stage, In the first inspection stage, while pressing the exterior body with a pressure bar having a pressure surface corresponding to a part of the range of the exterior body that covers the power generation element, the first between the metal layer and the terminal. Insulation defect inspection Transport the film-clad battery to the second inspection stage, In the second inspection stage, a second insulation defect inspection is performed between the metal layer and the terminal while pressing the exterior body with a pressure bar having a pressure surface corresponding to the remaining portion of the range.
- an insulation defect inspection is performed in each of the first and second inspection stages in a form in which the range of the outer body covering the power generation element is divided into two regions. Thereby, it is possible to reliably and efficiently inspect the insulation failure between the positive electrode plate or the negative electrode plate and the metal layer of the exterior body on the entire surface of the power generation element.
- the insulation failure inspection is performed in a state where the film-clad battery is pressurized from the outside, so that the insulation is maintained in the free state but the exterior body is pressed from the outside.
- Film-covered batteries that cause poor insulation can be found reliably and can be eliminated as defective products.
- the film-clad battery 1 is, for example, a lithium ion secondary battery, and has a flat rectangular external shape as shown in FIG. 1 and a pair of terminals made of conductive metal foil at one edge in the longitudinal direction. 2 and 3.
- the film-clad battery 1 is a battery in which a rectangular power generation element 4 is accommodated in an exterior body 5 made of a laminate film together with an electrolytic solution.
- the power generation element 4 includes a plurality of positive plates 41 and negative plates 42 that are alternately stacked with separators 43 interposed therebetween.
- the three negative plates 42, the two positive plates 41, and the gap therebetween And four separators 43 are located on both surfaces of the power generation element 4.
- a configuration in which the positive electrode plate 41 is located on the outermost layer of the power generation element 4 is also possible.
- the dimension of each part in FIG. 2 is not necessarily exact, and is exaggerated for explanation.
- the positive electrode plate 41 is obtained by forming positive electrode active material layers 41b and 41c on both surfaces of a rectangular positive electrode current collector 41a.
- the positive electrode current collector 41a is made of an electrochemically stable metal foil such as an aluminum foil, an aluminum alloy foil, a copper foil, or a nickel foil.
- the positive electrode active material layers 41b and 41c are made of, for example, a positive electrode active material made of a lithium composite oxide such as lithium nickelate (LiNiO 2 ), lithium manganate (LiMnO 2 ), or lithium cobaltate (LiCoO 2 ).
- a mixture of a conductive additive such as carbon black and a binder is applied to the main surface of the positive electrode current collector 41a, dried and rolled.
- the negative electrode plate 42 is obtained by forming negative electrode active material layers 42b and 42c on both surfaces of a rectangular negative electrode current collector 42a.
- the negative electrode current collector 42a is made of, for example, an electrochemically stable metal foil such as nickel foil, copper foil, stainless steel foil, or iron foil.
- the negative electrode active material layers 42b and 42c are made of, for example, a negative electrode active material that occludes and releases lithium ions of the positive electrode active material, such as amorphous carbon, non-graphitizable carbon, graphitizable carbon, or graphite.
- the mixture of the binder is applied to the main surface of the negative electrode current collector 42a, dried and rolled.
- a part of the edge in the longitudinal direction of the negative electrode current collector 42 a extends as an extension portion that does not include the negative electrode active material layers 42 b and 42 c, and the tip thereof is joined to the negative electrode terminal 3.
- a part of the edge in the longitudinal direction of the positive electrode current collector 41a extends as an extension portion that does not include the positive electrode active material layers 41b and 41c, and the tip thereof Is joined to the positive terminal 2.
- the separator 43 has a function of preventing a short circuit between the positive electrode plate 41 and the negative electrode plate 42 and at the same time holding an electrolyte.
- the separator 43 is made of polyolefin such as polyethylene (PE) or polypropylene (PP).
- PE polyethylene
- PP polypropylene
- the separator 43 is not limited to a single-layer film such as polyolefin, but may also be a three-layer structure in which a polypropylene film is sandwiched with a polyethylene film, or a laminate of a polyolefin microporous film and an organic nonwoven fabric. .
- the electrolyte solution is not particularly limited, but for example, a non-aqueous electrolyte solution in which a lithium salt is dissolved in an organic solvent can be used as an electrolyte generally used in a lithium ion secondary battery. .
- the exterior body 5 that houses the power generation element 4 having the above-described configuration together with the electrolytic solution is a three-layered structure including a heat-sealing layer 51, a metal layer 52, and a protective layer 53, as shown in an enlarged view in FIG. It consists of a laminated film having a structure.
- the intermediate metal layer 52 is made of, for example, an aluminum foil
- the heat-sealing layer 51 that covers the inner surface thereof is made of a synthetic resin that can be heat-fused, for example, polypropylene (PP), and is a protection that covers the outer surface of the metal layer 52.
- the layer 53 is made of a synthetic resin having excellent durability, such as polyethylene terephthalate (PET).
- a laminate film having a larger number of layers can also be used.
- the synthetic resin layers are laminated on both surfaces of the metal layer 52.
- the synthetic resin layer on the outer side of the metal layer 52 is not necessarily essential, and the configuration includes the synthetic resin layer only on the inner surface. It may be.
- the ratio of the amount of the electrolytic solution to the total value of the pore volumes of the electrodes 41 and 42 and the separator 43 is preferably 1.3 to 1.7.
- the outer package 5 has a two-sheet structure of one laminate film disposed on the lower surface side of the power generation element 4 in FIG. 2 and another laminate film disposed on the upper surface side. The four sides around the two laminate films are superposed and heat-sealed with each other.
- the illustrated example shows such a two-layer exterior body 5.
- the exterior body 5 is made of a single relatively large laminate film, and the power generation element 4 is arranged inside in a folded state, and the surrounding three sides are overlapped, and It is the structure which mutually heat-seal
- the pair of terminals 2 and 3 located on the short side of the rectangular film-clad battery 1 are drawn out through the bonding surface of the laminate film when the laminate film is heat-sealed.
- a pair of terminals 2 and 3 are arranged side by side on the same edge, but the positive terminal 2 is arranged on one edge and the negative terminal 3 is arranged on the other edge. It is also possible to do so.
- the manufacturing procedure of the film-clad battery 1 is as follows. First, the power generation element 4 is configured by sequentially stacking the positive electrode plate 41, the negative electrode plate 42, and the separator 43, and attaching the terminals 2 and 3 by spot welding or the like. Next, the power generating element 4 is covered with a laminate film that becomes the outer package 5, and the surrounding four sides (three sides in the case of the above-mentioned double fold) are heat-sealed leaving a relatively small filling port. Next, the exterior body 5 is filled with the electrolytic solution through the filling port, and then the filling port is heat-sealed to make the exterior body 5 sealed. Thus, the film-clad battery 1 is completed. Next, the battery is charged to an appropriate level, and in this state, aging is performed for a predetermined time. After this aging is completed, the battery is charged again for voltage inspection and shipped.
- this kind of film-clad battery 1 is used as a battery module in which a plurality are accommodated in a flat box-shaped casing.
- stacked within the casing of the battery module, for example, the exterior body 5 is the lamination direction ( It can be in a state of being slightly pressed in the direction orthogonal to the main surface of the power generation element 4.
- the insulation defect inspection of the present invention is performed between the metal layer 52 made of aluminum foil, which is an intermediate layer of the outer package 5, and the electrode plate of the power generation element 4, particularly the negative electrode plate 42 located in the outermost layer in the example of FIG.
- the manufacturing process described above after the filling of the electrolytic solution and the complete sealing of the outer package 5 (sealing of the filling port), as appropriate. It is executed at the right time.
- an inspection process can be provided immediately before shipment as the film-clad battery 1, or an inspection process may be provided immediately after the exterior body 5 is completely sealed.
- foreign matter may precipitate inside during the above aging process, it is also effective to provide an inspection process immediately after the aging process.
- FIG. 3 schematically shows the configuration of an inspection stage provided in the production line of the film-clad battery 1 as an inspection process for defective insulation.
- This inspection stage includes a preparation base 6 on which the film-clad battery 1 that has been completely filled with the electrolytic solution and the outer casing 5 has been completely transported, and a first (in other words, the first half) insulation defect inspection.
- An inspection stage 7 and a second inspection stage 8 for performing a second (in other words, second half) insulation defect inspection are provided.
- a first hand 9 that conveys one film-covered battery 1 to be inspected from the preparation base 6 to the first inspection stage 7 is arranged between the preparation base 6 and the first inspection stage 7.
- the 2nd hand 10 which conveys the film-clad battery 1 which the inspection of the first half in the 1st inspection stage 7 was completed to the 2nd inspection stage 8 is arrange
- Each of these first and second hands 9 and 10 is of a suction hand type in which a suction cup (not shown) at the front end sucks parts by negative pressure, with the support portions 9a and 9b as the center.
- the film-clad battery 1 is transported by the swiveling motion.
- the first inspection stage 7 is vertically arranged by an inspection table 71 on which the film-clad battery 1 to be inspected is placed, and a cylinder mechanism, a linear servo motor mechanism, or the like so as to press a part of the outer package 5 of the film-clad battery 1.
- a first pressure bar 72 that moves up and down in the direction and a first inspection device 73 that applies a voltage for inspection and analyzes a voltage signal after the application are provided.
- the first inspection device 73 includes a pair of probes 74 and 75 connected to the negative electrode terminal 3 of the film-clad battery 1 and the metal layer 52 in the laminate film, respectively.
- One probe 74 connected to the negative electrode terminal 3 is, for example, an electrode pad disposed on the inspection table 71 so as to face an electrode clip that sandwiches the negative electrode terminal 3, a pressing member that holds the negative electrode terminal 3 from above, or Conversely, it may be configured as an electrode pad that presses the negative electrode terminal 3 against the inspection table 71 from above.
- the other probe 75 connected to the metal layer 52 of the laminate film is formed into a sharp needle shape that can penetrate the laminate film, for example, and the blank portion of the laminate film that becomes the exterior body 5, that is, heat fusion. The continuity with the metal layer 52 is obtained by piercing the peripheral edge.
- the needle-like probe 75 may be configured to descend from above in the vertical direction and pierce the laminate film, or conversely, project from the lower side of the inspection table 71 upward. Instead of using the needle-like probe 75, an exposed portion of the metal layer 52 may be formed on a part of the laminate film.
- the second inspection stage 8 has basically the same configuration as that of the first inspection stage 7, and includes an inspection table 81 on which the film-covered battery 1 to be inspected is placed, and the exterior body 5 of the film-covered battery 1.
- a second pressure bar 82 that moves vertically up and down by a cylinder mechanism, a linear servo motor mechanism or the like so as to press a part, and a second inspection for applying a voltage for inspection and analyzing a voltage signal after the application.
- Device 83 includes a pair of probes 84 and 85 respectively connected to the negative electrode terminal 3 of the film-clad battery 1 and the metal layer 52 in the laminate film. These probes 84 and 85 are configured similarly to the probes 74 and 75 of the first inspection stage 7.
- the first inspection stage 7 and the second inspection stage 8 are different in the shape of the pressure surfaces of the pressure bars 72 and 82.
- the first pressure bar 72 in the first inspection stage 7 has, for example, an elongated rectangular pressure surface at the lower end so as to press a central portion in the width direction of the rectangular outer package 5 in a band shape.
- This pressure surface is basically a flat surface parallel to the upper surface of the inspection table 71.
- the second pressure bar 82 in the second inspection stage 8 presses two portions on both sides of the exterior body 5 that are not pressed by the first pressure bar 72 of the first inspection stage 7. It has a pair of rectangular pressing surfaces divided into two at the lower end. Reference numerals 82a and 82b in the figure indicate individual pressure surfaces divided into two. Specifically, a region corresponding to the pressure surface of the first pressure bar 72 out of a rectangular outer shape slightly larger than the projection range of the power generation element 4 in the outer package 5 (that is, the range covering the power generation element 4).
- the pressurizing surfaces 82a and 82b are formed in a shape excluding.
- the pressurization surface of the first pressurization bar 72 and the pressurization surface of the second pressurization bar 82 are in a complementary relationship, and the sum of the pressurization regions of both is the projection range of the power generation element 4 in the exterior body 5. It covers the whole.
- the pressurizing surfaces 82 a and 82 b basically form a flat surface parallel to the upper surface of the inspection table 81.
- the inspection stage is further confirmed to be insulated at both the inspection stages 7 and 8, and a defective product conveyor 11 that conveys defective products that are determined to be insulation failure at the first inspection stage 7 or the second inspection stage 8.
- a non-defective product conveyor 12 for conveying the non-defective product. Defective products determined to have an insulation failure in either the first inspection stage 7 or the second inspection stage 8 are discharged from the inspection stages 7 and 8 to the defective product conveyor 11 by a discharge mechanism (not shown). Further, the non-defective product is transferred from the second inspection stage 8 to the non-defective product conveyor 12 by a suction hand (not shown).
- FIG. 4 shows an insulation defect inspection process performed using the above-described inspection stage.
- Step a shows a state in which the film-clad battery 1 to be inspected is placed on the preparation table 6. From this state, the first hand 9 picks up the film-clad battery 1 and lifts it upward, and with the swiveling of the first hand 9, as shown as step b, on the inspection table 71 of the first inspection stage 7. The film-clad battery 1 is transferred to After the transfer, the first hand 9 is retracted.
- Step c shows the first insulation defect inspection for the film-clad battery 1 placed on the inspection table 71, and the probes 74 and 75 are applied to the negative electrode terminal 3 and the metal layer 52 of the laminate film as described above.
- the first pressurizing bar 72 is lowered and presses the central portion in the width direction of the exterior body 5.
- the first inspection device 73 applies a voltage for a short time between the probes 74 and 75 under the pressurized state in which a partial region of the projection range of the power generation element 4 is pressed in this way, and the subsequent voltage drop From this aspect, it is determined whether the insulation state is obtained or the insulation is defective.
- the insulation defect inspection is not limited to such a method, and various known methods can be applied as appropriate. By performing the inspection in a state where the pressure is applied by the first pressure bar 72 as described above, for example, although insulation is maintained in the free state, when the exterior body 5 is pressed against the power generation element 4, the insulation failure is detected. Such a defect can be reliably detected.
- the entire surface of the outer package 5 is not pressed all at once, but a part of the region is pressed, so that the outer package 5 does not interfere with the electrolyte solution that is densely packed inside.
- a properly compressed state can be reliably obtained from both sides.
- step c If it is determined in step c that the insulation is defective, the film-clad battery 1 is discharged to the defective product conveyor 11.
- step d the second hand 10 picks up the film-clad battery 1 on the inspection table 71 and lifts it upward, and the second hand 10 turns and the film-clad battery is turned. 1 is transferred onto the inspection table 81 of the next second inspection stage 8. After the transfer, the second hand 10 is retracted.
- Step e shows a second insulation defect inspection for the film-clad battery 1 placed on the inspection table 81, and the probes 84 and 85 of the second inspection device 83 are used for the negative electrode terminal 3 and the metal layer 52 of the laminate film.
- the second pressure bar 82 descends and presses both sides of the exterior body 5 in the width direction. Then, under the pressurized state in which a partial region of the projection range of the power generating element 4 is pressed in this way, the second inspection device 83 is short between the probes 84 and 85 as in the first inspection stage 7 described above. It is discriminated whether the insulation state is obtained or the insulation is defective from the aspect of the voltage drop after the time voltage is applied.
- step e When it is determined in step e that the insulation is defective, the film-clad battery 1 is discharged to the defective product conveyor 11. In other cases, the product is transferred to the non-defective conveyor 12 as a non-defective product.
- FIG. 5 is a flowchart showing the process flow of the insulation defect inspection as described above.
- step 1 the film-clad battery 1 is transferred to the first inspection stage 7, and in step 2, pressurization of the outer package 5 and application of a voltage for inspection are executed.
- step 3 it is determined whether or not the insulation is defective. If the insulation is not defective, the process proceeds to step 4.
- step 4 the film-clad battery 1 is transferred to the next second inspection stage 8, and in step 5, pressurization of the outer package 5 and application of a voltage for inspection are executed.
- step 6 it is determined whether or not the insulation is defective. If the insulation is not defective, it is finally determined in step 7 that the product is non-defective. If it is determined in step 3 or step 6 that the insulation is defective, the process proceeds to step 8 to eliminate the defective product.
- the surface area to be pressed (that is, the projection range of the power generation element 4) of the film-clad battery 1 is divided into three regions in the width direction in a plan view along the stacking direction of the power generation element 4, The central portion is pressed by the first inspection stage 7, and the remaining two portions are pressed by the second inspection stage 8.
- a division of the area is arbitrary, and for example, the inspection may be performed by dividing the area into a large number of areas.
- FIG. 6 shows a second embodiment in which the area to be pressed of the rectangular film-clad battery 1 is divided into two regions in the longitudinal direction.
- Step A shows a first insulation defect inspection on the first inspection stage 7, and the first pressure bar 72 that moves up and down with respect to the inspection table 71 is substantially the longitudinal direction of the film-coated battery 1 that forms a rectangle. It has a pressure surface covering half.
- inspection apparatus 73 is performed under the pressurization state which pressed the area
- Process B shows a second insulation defect inspection at the second inspection stage 8, and the second pressure bar 82 that moves up and down with respect to the inspection table 81 is a longitudinal direction of the film-covered battery 1 having a rectangular shape. And a pressing surface that covers a portion near the terminals 2 and 3. Thereby, the insulation defect inspection by the second inspection device 83 is executed under the pressurized state in which the remaining area of the film-clad battery 1 that has not been pressed by the first inspection stage 7 is pressed.
- the first insulation failure inspection and the second insulation failure inspection are performed on separate inspection tables.
- each insulation defect inspection may be sequentially performed while pressing different areas on one inspection table.
- the insulation failure inspection is performed on the negative electrode terminal 3.
- the insulation failure inspection can be performed on the positive electrode terminal 2, and the negative electrode terminal 3 and the positive electrode terminal 2 can be inspected. It is also possible to perform an insulation failure inspection for both.
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Abstract
Description
上記発電要素の積層方向に沿って上記外装体を外側から加圧し、この加圧状態において、上記端子と上記金属層との間で絶縁不良検査を行う。
電解液を充填しかつ外装体をシールしたフィルム外装電池を、第1の検査ステージに搬送し、
第1の検査ステージにおいて、上記発電要素を覆う上記外装体の範囲の一部に対応した加圧面を有する加圧バーによって上記外装体を加圧しつつ、上記金属層と端子との間で第1の絶縁不良検査を行い、
フィルム外装電池を第2の検査ステージに搬送し、
第2の検査ステージにおいて、上記範囲の残部に対応した加圧面を有する加圧バーによって上記外装体を加圧しつつ、上記金属層と端子との間で第2の絶縁不良検査を行う。
Claims (4)
- 正極板および負極板をセパレータを介して積層してなる発電要素が、金属層の少なくとも内側表面に合成樹脂層をラミネートしたラミネートフィルムからなる外装体の内部に電解液とともに収容され、端子を導出した状態で上記外装体が密封されてなる偏平なフィルム外装電池の検査方法であって、
上記発電要素の積層方向に沿って上記外装体を外側から加圧し、この加圧状態において、上記端子と上記金属層との間で絶縁不良検査を行う、フィルム外装電池の検査方法。 - 上記積層方向に沿った平面視において上記外装体の表面を複数の領域に区分し、各領域毎に加圧して、各々の加圧状態において上記絶縁不良検査を行う、請求項1に記載のフィルム外装電池の検査方法。
- 各回の加圧領域の総和が、少なくとも上記発電要素を覆う上記外装体の範囲の全体を含んでいる、請求項2に記載のフィルム外装電池の検査方法。
- 電解液を充填しかつ外装体をシールしたフィルム外装電池を、第1の検査ステージに搬送し、
第1の検査ステージにおいて、上記発電要素を覆う上記外装体の範囲の一部に対応した加圧面を有する加圧バーによって上記外装体を加圧しつつ、上記金属層と端子との間で第1の絶縁不良検査を行い、
フィルム外装電池を第2の検査ステージに搬送し、
第2の検査ステージにおいて、上記範囲の残部に対応した加圧面を有する加圧バーによって上記外装体を加圧しつつ、上記金属層と端子との間で第2の絶縁不良検査を行う、
請求項1に記載のフィルム外装電池の検査方法。
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JP2015506501A JP5909022B2 (ja) | 2013-03-22 | 2013-03-22 | フィルム外装電池の検査方法 |
US14/778,378 US9917337B2 (en) | 2013-03-22 | 2013-03-22 | Inspection method for film covered battery |
CN201380074989.4A CN105051967B (zh) | 2013-03-22 | 2013-03-22 | 薄膜封装电池的检查方法 |
KR1020157022382A KR20150135230A (ko) | 2013-03-22 | 2013-03-22 | 필름 외장 전지의 검사 방법 |
PCT/JP2013/058265 WO2014147808A1 (ja) | 2013-03-22 | 2013-03-22 | フィルム外装電池の検査方法 |
EP13878774.2A EP2978063B1 (en) | 2013-03-22 | 2013-03-22 | Inspection method for film covered battery |
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JPWO2014147808A1 (ja) | 2017-02-16 |
CN105051967B (zh) | 2017-10-03 |
JP5909022B2 (ja) | 2016-04-26 |
CN105051967A (zh) | 2015-11-11 |
KR20150135230A (ko) | 2015-12-02 |
EP2978063A1 (en) | 2016-01-27 |
US20160072157A1 (en) | 2016-03-10 |
EP2978063B1 (en) | 2016-10-05 |
US9917337B2 (en) | 2018-03-13 |
EP2978063A4 (en) | 2016-03-16 |
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