US20150349311A1 - Conveying apparatus and a conveying method of separator of electric device - Google Patents
Conveying apparatus and a conveying method of separator of electric device Download PDFInfo
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- US20150349311A1 US20150349311A1 US14/646,243 US201314646243A US2015349311A1 US 20150349311 A1 US20150349311 A1 US 20150349311A1 US 201314646243 A US201314646243 A US 201314646243A US 2015349311 A1 US2015349311 A1 US 2015349311A1
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- separator
- electrode
- melt material
- conveying
- heat
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
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- H01M2/1686—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B18/00—Layered products essentially comprising ceramics, e.g. refractory products
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H16/00—Unwinding, paying-out webs
- B65H16/02—Supporting web roll
- B65H16/021—Multiple web roll supports
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H20/00—Advancing webs
- B65H20/10—Advancing webs by a feed band against which web is held by fluid pressure, e.g. suction or air blast
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
- B65H35/04—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators
- B65H35/06—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators from or with blade, e.g. shear-blade, cutters or perforators
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- H01M2/145—
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- H—ELECTRICITY
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
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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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
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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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/202—Conductive
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- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
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- B65H2301/50—Auxiliary process performed during handling process
- B65H2301/51—Modifying a characteristic of handled material
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- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/10—Rollers
- B65H2404/14—Roller pairs
- B65H2404/143—Roller pairs driving roller and idler roller arrangement
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2406/00—Means using fluid
- B65H2406/30—Suction means
- B65H2406/32—Suction belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B65H2801/00—Application field
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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
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
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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
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
Definitions
- the present invention relates to a transfer or conveying apparatus of a separator of an electric device and to a conveying method thereof.
- a power generating element for performing charging and discharging operations is sealed in an outer package.
- the Power generating element is formed by stacking a separator and electrodes.
- the separator easily shrinks when heated. When the separator shrinks, electrical short circuit occurs locally. This would reduce the output of the electrical device.
- the separator is prevented from shrinkage or contracting even if the separator is heated.
- the present invention has been made to solve the problems described above, and is intended to provide a conveying apparatus of a separator of electric device and a conveying method thereof according to which the separator formed by laminating a heat-resistant material on a substrate melt material may be conveyed at a constant feed amount or rate.
- a conveying apparatus of a separator for an electrical device to solve the problem above is configured to alternately laminate a first electrode on a second electrode different in polarity from the first electrode with a separator interposed therebetween.
- a separator is prepared which includes a melt or fused material as substrate or base material and a heat-resistant material of higher melting point than the melt material.
- a drive member that contacts the separator to convey the separator and a pressurizing member that urges the drive member via the separator to be driven by the drive member are prepared.
- the drive member is in contact with the melt material of the separator.
- a conveying method of a separator of an electrical device that achieves the object above is configured to alternately laminate a first electrode and a second electrode different in polarity from the first electrode and to convey the laminated body.
- a separator is prepared which includes a melt material as substrate or base material and a heat-resistant material of higher melting point than the melt material.
- a drive member that contacts the separator to convey the separator and a pressurizing member that urges the drive member via the separator to be driven by the drive member are used to convey the separator.
- the drive member contacts the melt material of the separator.
- FIG. 1 is a perspective view showing an electrical device in which separators are joined in the separator welding apparatus comprising a separator conveying apparatus pertaining to the present embodiment
- FIG. 2 is an exploded perspective view showing an electrical device in which separators are joined by separator welding apparatus comprising a separator conveying apparatus pertaining to the present embodiment
- FIG. 3 is a perspective view showing a state in which, by the welding apparatus comprising a separator conveying apparatus pertaining to the present embodiment, a positive electrode is enclosed in a bag or pouch by a pair of separators to form a pouch electrode on both ends thereof being laminated with a negative electrode, respectively;
- FIG. 4 is a sectional view pertaining to the present embodiment taken along line 4 - 4 of FIG. 3 ;
- FIG. 5 is a perspective view showing a separator welding apparatus provided with a separator conveying apparatus pertaining to the present embodiment for joining the separator of the electrical device;
- FIG. 6 is a side view showing the vicinity of the separator conveying apparatus pertaining to the present embodiment.
- FIG. 7 is a side view showing the vicinity of a separator conveying apparatus pertaining to Comparative Example.
- FIG. 1 is a perspective view showing an electrical device 1 in which separators are joined by the separator welding apparatus 100 comprising a separator conveying apparatus 500 , 600 pertaining to the present embodiment
- FIG. 2 is an exploded perspective view showing an electrical device 1 in which separators are joined by the separator welding apparatus 100 comprising a separator conveying apparatus 500 , 600 pertaining to the present embodiment
- FIG. 3 is a perspective view showing a state in which, by the welding apparatus 100 comprising a separator conveying apparatus 500 , 600 pertaining to the present embodiment, a positive electrode 10 is enclosed in a bag or pouch by a pair of separators 30 to form a pouch electrode 50 on both ends thereof being laminated with a negative electrode 20 , respectively
- FIG. 4 is a sectional view taken along line 4 - 4 shown FIG. 3 .
- the electrical device 1 represents a lithium ion secondary battery, a lithium polymer battery, a nickel hydrogen battery, a nickel cadmium battery.
- the power generating element 60 for charge/discharge is sealed with an outer covering or exterior material 40 .
- the power generating element 60 is configured by alternately laminating a pouched electrode 50 sandwiching a positive electrode 10 by a pair of separators 30 for welding and a negative electrode 20 .
- the positive electrode 10 represents a first electrode, and is formed by bonding on both surfaces of a conductive, positive electrode collector 11 positive active materials 12 , as shown in FIG. 2 .
- a positive electrode terminal 11 a for taking out the power is formed by extending a part of one end of the positive electrode collector 11 .
- a plurality of positive electrode terminals 11 a of the plurality of laminated positive electrodes 10 are fixed together by welding or adhesive.
- the material of the positive electrode current collector 11 of the positive electrode 10 is made of aluminum expanded metal, or aluminum mesh or aluminum punched metal.
- the material of the positive electrode active material 12 of the positive electrode 10 is composes of various oxides (lithium manganese oxide, such as LiMn2O4; manganese dioxide; lithium nickel oxides such as LiNiO2; lithium cobalt oxide such as LiCoO2; lithium-containing nickel-cobalt oxide; amorphous pentoxide vanadium containing lithium) or chalcogen compound (titanium disulfide, molybdenum disulfide).
- a negative electrode 20 corresponds to a second electrode of different polarity to the first electrode (positive electrode 10 ), and as shown in FIG. 2 , is formed by bonding negative active material 22 on both surfaces of a negative electrode current collector 21 which is conductive.
- a negative electrode terminal 21 a is formed by extending from a part of one end of the negative electrode collector 21 so as not overlap the positive electrode terminal 11 a formed in the positive electrode 10 .
- the longitudinal length of the negative electrode 20 is longer than the longitudinal length of the positive electrode 10 . In the lateral length of the negative electrode 20 is of the same as that of the positive electrode 10 .
- a plurality of negative electrode terminals 21 a of the negative electrodes 20 stacked is secured together by adhesive or welding.
- the material of the negative electrode current collector 21 of the negative electrode 20 is made from a copper expanded metal, copper mesh, or copper punched metal.
- As the material of the negative electrode active material 22 of the negative electrode 20 when the electrical device 1 is a lithium ion secondary battery, and use is made of a carbon material that adsorbs and releases lithium ion.
- carbon material for example, natural graphite, artificial graphite, carbon black, activated carbon, carbon fiber, coke, or organic precursor (phenolic resin, polyacrylonitrile, or cellulose) is heat-treated in an inert atmosphere and synthetic carbon is used.
- the separator 30 is provided between the positive and negative electrodes 10 , 20 to electrically isolate the positive electrode 10 and the negative electrode 20 from each other. By holding an electrolyte solution between the positive electrode 10 and the negative electrode 20 , the separator 30 ensures conductivity of the ion.
- the separator 30 is formed in a rectangular shape. The longitudinal length of the separator 30 is longer than the longitudinal length of the negative electrode 20 except the portion of the negative electrode terminal 21 a.
- the separator 30 is formed by laminating a heat-resistant material 32 on one surface of the molten material or member 31 .
- the heat-resistant material 32 has a melting temperature higher than the melt material 31 .
- the frictional force is changed due to irregularities which occur on the surface of the heat-resistant material 32 .
- the heat-resistant material 32 that is laminated to the melt material 31 is peeled off, the surface of the melt material 31 is exposed.
- a pair of adjacent separators 30 is bonded with the associated hot-melt material 32 faced to each other.
- the heat-resistant material 32 is powder which may easily scatter after being applied to the melt material 31 and subsequently dried, the powder may be confined and sealed in the interior of the pair of the adjacent separators 30 . That is, even if the electrical device 1 receives shock or vibrations, it is possible to prevent scattering of the heat-resistant material 32 of the separator 30 .
- the material of the molten material 31 of the separator 30 for example, use may be made of a polypropylene.
- the molten material 31 is impregnated with a non-aqueous electrolyte solution prepared by dissolving an electrolyte in a non-aqueous solvent.
- a non-aqueous electrolyte solution prepared by dissolving an electrolyte in a non-aqueous solvent.
- use is made to contain a polymer.
- the heat-resistant material 32 of the separator 30 As a material of the heat-resistant material 32 of the separator 30 , for example, use is made of ceramic molded with high temperature inorganic compounds.
- the ceramic is formed to be porous by binding ceramic particles of silica, alumina, zirconium oxide, titanium oxide with a binder.
- the material of the heat-resistant material 32 is not limited to ceramic. The alternative is acceptable as long as the melting temperature thereof may be higher than the melting member 31 .
- the ceramic particles correspond to the powder, in which the binding effect may be different and the peel strength is thereby affected depending on density and coupling condition of the binder, for example.
- the outer or exterior package 40 may be consisted, for example, of laminate sheets 41 , 42 with a metal plate inside and is sealed by covering both sides of the power generating element 60 .
- a portion of the periphery of the laminate sheet 41 and 42 is made open, and the other periphery will be sealed by heat welding or the like.
- An electrolyte is injected from the portion that is open and the separator 30 or the like is impregnated with a liquid charge. While depressurizing the interior from the open portion of the laminate sheets 41 , 42 to remove air, the open portion will also be heat-sealed to seal completely.
- the material for the laminate sheets 41 , 42 for example, use is made of three different, laminated materials. Specifically, with respect to the material of the heat-fusible resin of the first layer adjacent to the negative electrode 20 , use is made of, for example, polyethylene (PE), ionomer, or ethylene vinyl acetate (EVA). As the metal foil of the second layer, for example, use is made of an Al foil or Ni foil. As the resin film of the third layer, for example, use is made of polyethylene terephthalate (PET) or nylon with rigidity.
- PET polyethylene terephthalate
- FIG. 6 is a perspective view showing a separator welding apparatus 100 provided with separator conveying apparatus 500 , 600 for joining the separators 30 together.
- FIG. 6 is a side view showing the vicinity of the separator conveying apparatus 500
- FIG. 7 is a side view of the separator conveying apparatus pertaining to Comparative Example.
- the positive electrode 10 is held by being wound into a roll around a positive electrode winding roller 210 .
- the positive electrode winding roller 210 is formed in a cylindrical shape and rotates in a clockwise direction following the rotation of the suction conveyor 310 .
- the positive electrode 10 is carried out from the positive electrode winding roller 210 conveyed in the direction of 640 toward a vacuum suction conveyance drum 540 described below through a conveyance roller 220 .
- the suction conveyer 310 consists of an endless belt and provided with a plurality of suction holes on the surface. On the inner circumferential surface of the suction conveyor 310 , a plurality of rotating rollers 320 is arranged. One of a plurality of the rotating rollers 20 is intended for a driving roller, and the others are driven rollers.
- the suction conveyors 310 caused to be rotated in a clockwise direction by the plurality of rotating rollers 320 are provided in two sets respectively on the conveyance downstream side and the conveyance upstream side of the positive electrode with respect to the vacuum suction conveyance drums 540 , 640 .
- the cutting members 410 , 420 for cutting out the positive electrode 10 are disposed between two sets of suction conveyors 310 disposed upstream in the conveyance direction of the positive electrode 10 with respect to the vacuum suction conveyance drum 540 , 640 .
- the cutting member 410 is provided at the tip with a sharp and straight cutting blade and cuts one end of the positive electrode 10 that is continuous.
- the cutting member 420 is provided with a sharp and bent cutting blade at the tip, and cuts the other end of the positive electrode 10 immediately after being cut at that one end.
- the shape of the bent cutting blade of the cutting member 420 corresponds to the shape of the positive electrode terminal 11 a.
- One separator 30 out of the pair of separators 30 is held in a roll and wound around the separator winding roller 510 .
- a melt or fused material 31 of the one separator 30 is in contact with a side of axis of the separator winding roller 510 ,
- the separator winding roller 510 is formed in a cylindrical shape and allowed to rotate in counterclockwise direction following the rotation of the vacuum suction conveyance drum 540 representing the conveying apparatus.
- the one separator 30 is conveyed with a constant tension posed and sandwiched between the pressure roller 520 and the nip roller 530 , and is further caused to rotate in a counterclockwise in a state of being vacuum sucked around the vacuum suction conveyance drum 540 .
- the vacuum suction conveyance drum 540 is formed in a cylindrical shape with a plurality of suction ports.
- the one separator 30 is cut with a constant width by the cutting member 430 which is disposed in the vicinity of the vacuum suction conveying drum 540 and has a sharp cutting blade at the tip.
- the separator conveying apparatus 500 includes a pressure roller 520 and a nip roller.
- the nip roller 530 formed in a rotatable cylindrical shape or columnar shape, corresponds to a drive member, and is made, at its nip portion 530 a in contact with the melt material 31 of the separator 30 of rubber material such as urethane and the like.
- the nip roller 530 is allowed to rotate by a drive motor 531 via a shifting gear and the like.
- the pressure roller 520 corresponds to a pressurizing member, and is formed in metal at a portion in contact with the heat-resistant material 32 of the separator 30 .
- the pressure roller 520 is further formed in a shape of rotatable cylinder or column.
- the separators 30 will be sandwiched by a gap 500 a created between the nip roller 530 and the pressure roller 520 .
- the nip rollers 530 , 630 is allowed to abut on or contact the portion of the melt material 31 representing a base or substrate, not a portion of heat-resistant material 32 which is likely to be peeled or shaved. Therefore, the separator 30 formed by laminating the heat-resistant material 32 on the melt material 31 maybe conveyed at a constant feed rate or size. Since the nip rollers 530 , 630 which contact the separator for conveyance thereof are in contact with the portion of the melt material 31 , the heat-resistant material will be free from an excessive stress to be applied. Thus, the heat-resistant material 32 of the separator 30 may be prevented from being peeled off or separated from the melt material 31 or from receiving a contact wound or touching mark.
- the other separator 30 of the pair separators 30 is held wound in a roll around the separator winding roller 610 .
- a melt material 31 of the other separator 30 is in contact with a side of axis of the separator winding roller 610 ,
- the separator winding roller 610 is formed in a cylindrical shape and allowed to rotate in clockwise direction following the rotation of the vacuum suction conveyance drum 640 representing the conveying apparatus.
- the other separator 30 is conveyed with a constant tension posed and sandwiched between the pressure roller 620 and the nip roller 630 , and is further caused to rotate in a clockwise in a state of being vacuum sucked around the vacuum suction conveyance drum 640 .
- the vacuum suction conveyer drum 640 is formed in a cylindrical shape with a plurality of suction ports.
- the other separator 30 is cut with a constant width by the cutting member 440 which is disposed in the vicinity of the vacuum suction conveying drum 640 and has a sharp cutting blade at the tip.
- the separator conveying apparatus 600 has a structure similar to that of the separator conveying apparatus 500 .
- the separator conveying apparatus 600 includes a pressure roller 520 and a nip roller 630 .
- the nip roller 630 formed in a rotatable cylindrical shape or columnar shape, corresponds to a drive member, and is made, at its nip portion in contact with the melt material 31 of the separator 30 of rubber material such as urethane and the like.
- the nip roller 630 is allowed to rotate by a drive motor (not shown) via a shifting gear and the like.
- the pressure roller 620 corresponds to a pressurizing member, and is formed in metal at a portion in contact with the heat-resistant material 32 of the separator 30 .
- the pressure roller 520 is further formed in a shape of rotatable cylinder or column.
- the separators 30 will be sandwiched by a gap 500 a created between the nip roller 530 and the pressure roller 520
- the one separator 30 , the positive electrode 10 , and the other separator 30 are conveyed in a laminated state such that the pair of the separators 30 sandwich the positive electrode 10 in a gap created between the vacuum suction conveyance drums 540 , 640 .
- the heating press member 710 is respectively disposed above and below both ends of the pair of separators 30 in the longitudinal direction thereof and is configured to sandwich the pair of the separators 30 and subsequently move up or down to separate from each other.
- the pair of separators 30 sandwiching the positive electrode 10 are joined or welded to form a pouched electrode 50 .
- the pair of the separators 30 is disposed such that the respective heat-resistant member 32 comes to face each other.
- the heating press member 710 is made of stainless steel or copper, for example, and formed in a cuboid shape.
- the heating press member 710 is driven to move up and down by a drive unit not shown.
- the heating press member 710 will be heated by a heat wire or a heating bulb.
- a plurality of the heating press members 710 sandwich both ends of the pair of the separators 30 in the longitudinal direction thereof from the vertical direction to join the pair of the separators 30 .
- the pair of the separators 30 is held heated and pressurized by the heating press member 710 .
- the heating press member 710 is adjusted to a temperature at which the melt material 31 of the pair of the separators 30 is caused to melt while preventing the heat-resistant material 32 from being melt.
- the pair of the separators 30 is joined together. Subsequently, the plurality of the heating press members 710 will be separated from the joined pair of the separators 30 .
- the pair of separators 30 sandwiching the positive electrode 10 are subject to heat and pressure by the heating press member 710 to weld the paired separators 30 .
- the welding process of a pair of separators 30 corresponds to a process for forming so-called pouched electrode 50 which is excellent in terms of productivity and quality.
- a bagged or pouched electrode suction pad 810 places a completed pouched electrode 50 temporarily on a mounting table 850 .
- the pouched electrode suction pad 810 is plate-shaped and provided with a plurality of suction ports in the surface which is in contact with the pouched electrode 50 .
- the pouched electrode suction pad 810 is coupled to an end of a telescopic part 820 , which is telescopically extendable by power of the air compressor or the like, for example (not shown).
- the other end of the telescopic part 820 is coupled to a plate-shaped support member 830 .
- the support member 830 reciprocates along a pair of rails by a rotation motor (not shown), for example.
- the pouched electrode suction pad 810 moves by the telescopic part 820 , support member 830 , and the pair of rails 840 , the pouched electrode 50 which has been conveyed by the suction conveyor 310 to place on the mounting table 850 .
- the separator conveying apparatus 500 , 600 for an electrical device 1 is intended to convey a laminated body formed by alternately stacking or laminating a positive electrode 10 , a negative electrode 20 with a polarity different from the positive electrode 10 with a separator 30 interposed there between.
- a separator 30 is used that includes a melt material 31 representing a base or substrate and a heat-resistant material 32 laminated on one surface of the melt material 31 and having a melting point higher than the melt material 31 .
- the apparatus further includes nip rollers 530 , 640 for contacting the separator 30 to convey the separator 30 , and press rollers 520 , 620 for urging the nip rollers 530 , 630 via the separator 30 and driven by the nip rollers 530 , 630 .
- the nip rollers 530 , 630 contact the portion of the melt material 31 of the separator 30 .
- the nip rollers 530 , 630 are not placed in contact with the portion of the heat-resistant material 32 which is likely to be peeled off or shaved, but allowed to contact with the melt material 31 constituting a substrate. Therefore, it is possible to convey the separator 30 formed by laminating the heat-resistant material 32 on the melt material 31 at a constant feed size.
- the melt material 31 of the separator 30 contacts the side of the nip rollers 530 , 560 which serve to impart a conveying force of the separator 30 by contacting the separator 30 , no excessive stress is applied to the heat-resistant material 32 . Therefore, the heat-resistant material 32 of the separator 30 is prevented from being peeled off from the molten material 31 or producing contact wound.
- the nip rollers 530 and 630 are formed of an elastic material at the portion in contact with the melt material 31 of the separator 30 .
- the pressure rollers 520 , 620 are formed in metal at the portion that comes into contact with the heat-resistant material 32 of the separator 30 .
- the nip rollers 530 , 630 are made of an elastic material with good conformability to the shape of the separator 30 , when urged by the pressure rollers 530 , 620 , a nip portion 530 with a partly recess may be formed.
- a preset friction force may be generated against the melt material 31 of the separator 30 so that the separator 30 may be conveyed with its feeding rate maintained at high accuracy.
- the pressure rollers 520 , 620 have a metal portion in contact with the heat-resistant material 32 of the separator 30 .
- the surface of the rollers may be polished to reduce 620 and the pressure roller 520 includes a heat-resistant material 32 of the separator 30 , reducing the coefficient of friction.
- the metal formed with reduced coefficient of friction also makes adherence of the heat-resistant material difficult. Even when the heat-resistant material 32 may be attached to the pressure rollers 520 , 620 , these rollers are driven rollers following the nip rollers 530 , 630 . Thus, the incident would not affect the accuracy of the feed size of the separator 30 .
- the heat-resistant material 32 of the separator to be conveyed may be configured to include a powder applied and dried to the melt material 31 .
- the heat-resistant material which comes into contact with the pressure roller 520 is made of powder extremely easily scraped such as a ceramic molding of inorganic compound at a high temperature and the friction force undergoes extremely high fluctuations due to the generated irregularities on the surface, the nip rollers 530 , 630 which control the feeding size of the separator are unlikely to be influenced since these are in contact with the melt material.
- the nip roller 1030 corresponding to a drive member contacts the heat-resistant material 32 of the separator, while the pressure roller 1020 corresponding to a pressurizing member is in contact with the molten metal 31 of the separator 30 .
- a driving motor 1031 via a shifting gear and the like, the nip roller is caused to rotate.
- the nip roller 1030 is urged or pressed by the pressure roller 1020 and forms a nip portion 1030 a with a part recessed.
- a separator 30 is sandwiched in a gap 1000 s between the nip roller 1030 and the pressure roller 1020 .
- the heat-resistant material 32 is made contact with, which is easier to be shaved or peeled off compared to the melt material 31 .
- the friction force between the nip roller 1030 and the separator 30 becomes unstable so that it is impossible to convey the separate at high accuracy of feed rate.
- the nip rollers 530 , 630 are placed in contact with the melt material 31 constituting a substrate, not with the heat-resistant material portion which is susceptible of easy shave and separation. Therefore, in the present embodiment, it is possible to convey the separator 30 composed of laminated body of the melt material 31 and the heat-resistant material 32 at a constant or stable feed rate.
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- Fluid Mechanics (AREA)
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- Ceramic Engineering (AREA)
- Cell Separators (AREA)
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- Laminated Bodies (AREA)
Abstract
A conveying apparatus for a separator of an electrical device alternately laminates a first electrode and a second electrode of different polarity from the first electrode, with a separator interposed therebetween to form a laminated body for conveyance. The separator includes a melt material representing a substrate and a heat-resistant material laminated on one surface of the melt material and having a higher melting point than the melt material. The separator conveying apparatus includes a drive member which makes contact with the separator and conveys the separator; and a pressure member which, while urging the drive member via the separator, is driven by the drive member. The drive member makes contact with the melt material portion of the separator. With this separator conveying apparatus, it is possible to maintain constant feed size or dimension of the separator assembly.
Description
- The present application claims priority to Japanese Patent Application No. 2012-266495, filed Dec. 5, 2012, incorporated herein in its entirety.
- The present invention relates to a transfer or conveying apparatus of a separator of an electric device and to a conveying method thereof.
- Conventionally, in an electrical device such as a secondary battery, a power generating element for performing charging and discharging operations is sealed in an outer package. The Power generating element is formed by stacking a separator and electrodes. The separator easily shrinks when heated. When the separator shrinks, electrical short circuit occurs locally. This would reduce the output of the electrical device.
- Thus, by using, as a counter measure a separator which is formed by laminating on a substrate melt material a heat-resistant material having a melting point higher than the melting point of the melt material, the separator is prevented from shrinkage or contracting even if the separator is heated.
- Incidentally, there is a configuration of bonding both surfaces of an elongate separate by sandwiching with an elongate positive electrode plate and an elongate negative electrode while conveying. That is, the positive electrode plate is laminated or stacked on one surface of the separator, while the negative electrode plate is laminated on the other surface of the separator. Since the positive and negative plates are made of different materials, easiness to peeling is different as well (for example, see Japanese Patent Application Publication No. 2009-181832 A).
- However, in Japanese Patent Application Publication No. 2009-181832 A, when conveying the elongate member prepared with another member being laminated on the substrate, no considerations in view of differences such as ease of separation due to the difference in materials is made so as to provide a structure to ensure conveyance while maintaining accuracy in conveyance amount or feed amount.
- In such a configuration, for example, in the case of the separator formed by laminating a heat-resistant material on a molten material as the substrate or base material, when the heat-resistant material is scraped or peeled off, it is likely that the conveyance amount the separator changes.
- The present invention has been made to solve the problems described above, and is intended to provide a conveying apparatus of a separator of electric device and a conveying method thereof according to which the separator formed by laminating a heat-resistant material on a substrate melt material may be conveyed at a constant feed amount or rate.
- A conveying apparatus of a separator for an electrical device to solve the problem above is configured to alternately laminate a first electrode on a second electrode different in polarity from the first electrode with a separator interposed therebetween. A separator is prepared which includes a melt or fused material as substrate or base material and a heat-resistant material of higher melting point than the melt material. Also, a drive member that contacts the separator to convey the separator and a pressurizing member that urges the drive member via the separator to be driven by the drive member are prepared. Here, the drive member is in contact with the melt material of the separator.
- Further, a conveying method of a separator of an electrical device that achieves the object above is configured to alternately laminate a first electrode and a second electrode different in polarity from the first electrode and to convey the laminated body. A separator is prepared which includes a melt material as substrate or base material and a heat-resistant material of higher melting point than the melt material. Also, a drive member that contacts the separator to convey the separator and a pressurizing member that urges the drive member via the separator to be driven by the drive member are used to convey the separator. Here, the drive member contacts the melt material of the separator.
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FIG. 1 is a perspective view showing an electrical device in which separators are joined in the separator welding apparatus comprising a separator conveying apparatus pertaining to the present embodiment; -
FIG. 2 is an exploded perspective view showing an electrical device in which separators are joined by separator welding apparatus comprising a separator conveying apparatus pertaining to the present embodiment; -
FIG. 3 is a perspective view showing a state in which, by the welding apparatus comprising a separator conveying apparatus pertaining to the present embodiment, a positive electrode is enclosed in a bag or pouch by a pair of separators to form a pouch electrode on both ends thereof being laminated with a negative electrode, respectively; -
FIG. 4 is a sectional view pertaining to the present embodiment taken along line 4-4 ofFIG. 3 ; -
FIG. 5 is a perspective view showing a separator welding apparatus provided with a separator conveying apparatus pertaining to the present embodiment for joining the separator of the electrical device; -
FIG. 6 is a side view showing the vicinity of the separator conveying apparatus pertaining to the present embodiment; and -
FIG. 7 is a side view showing the vicinity of a separator conveying apparatus pertaining to Comparative Example. - Below, with reference to the accompanying drawings, description is given of an embodiment of the present invention. The same reference numerals are given to the same elements, and duplicate description will be omitted in the description of the drawings. The proportion and size of each member in the drawings may be different from the proportion and the size of the actual one, and exaggerated for convenience of explanation.
- First, description is given of a structure of an
electrical device 1 in whichseparators 30 conveyed by aseparator welding apparatus 100 with aseparator conveying apparatus FIGS. 1 to 4 . -
FIG. 1 is a perspective view showing anelectrical device 1 in which separators are joined by theseparator welding apparatus 100 comprising aseparator conveying apparatus FIG. 2 is an exploded perspective view showing anelectrical device 1 in which separators are joined by theseparator welding apparatus 100 comprising aseparator conveying apparatus FIG. 3 is a perspective view showing a state in which, by thewelding apparatus 100 comprising aseparator conveying apparatus positive electrode 10 is enclosed in a bag or pouch by a pair ofseparators 30 to form apouch electrode 50 on both ends thereof being laminated with anegative electrode 20, respectively; andFIG. 4 is a sectional view taken along line 4-4 shownFIG. 3 . - As shown in
FIG. 1 , for example, theelectrical device 1 represents a lithium ion secondary battery, a lithium polymer battery, a nickel hydrogen battery, a nickel cadmium battery. A shown inFIG. 2 , in theelectrical device 1, the power generatingelement 60 for charge/discharge is sealed with an outer covering orexterior material 40. Thepower generating element 60 is configured by alternately laminating apouched electrode 50 sandwiching apositive electrode 10 by a pair ofseparators 30 for welding and anegative electrode 20. - The
positive electrode 10 represents a first electrode, and is formed by bonding on both surfaces of a conductive,positive electrode collector 11 positiveactive materials 12, as shown inFIG. 2 . Apositive electrode terminal 11 a for taking out the power is formed by extending a part of one end of thepositive electrode collector 11. A plurality ofpositive electrode terminals 11 a of the plurality of laminatedpositive electrodes 10 are fixed together by welding or adhesive. - The material of the positive electrode
current collector 11 of thepositive electrode 10, for example, is made of aluminum expanded metal, or aluminum mesh or aluminum punched metal. When theelectrical device 1 is a lithium ion secondary battery, the material of the positive electrodeactive material 12 of thepositive electrode 10 is composes of various oxides (lithium manganese oxide, such as LiMn2O4; manganese dioxide; lithium nickel oxides such as LiNiO2; lithium cobalt oxide such as LiCoO2; lithium-containing nickel-cobalt oxide; amorphous pentoxide vanadium containing lithium) or chalcogen compound (titanium disulfide, molybdenum disulfide). - A
negative electrode 20 corresponds to a second electrode of different polarity to the first electrode (positive electrode 10), and as shown inFIG. 2 , is formed by bonding negativeactive material 22 on both surfaces of a negative electrodecurrent collector 21 which is conductive. Anegative electrode terminal 21 a is formed by extending from a part of one end of thenegative electrode collector 21 so as not overlap thepositive electrode terminal 11 a formed in thepositive electrode 10. The longitudinal length of thenegative electrode 20 is longer than the longitudinal length of thepositive electrode 10. In the lateral length of thenegative electrode 20 is of the same as that of thepositive electrode 10. A plurality ofnegative electrode terminals 21 a of thenegative electrodes 20 stacked is secured together by adhesive or welding. - The material of the negative electrode
current collector 21 of thenegative electrode 20, for example, is made from a copper expanded metal, copper mesh, or copper punched metal. As the material of the negative electrodeactive material 22 of thenegative electrode 20, when theelectrical device 1 is a lithium ion secondary battery, and use is made of a carbon material that adsorbs and releases lithium ion. As such carbon material, for example, natural graphite, artificial graphite, carbon black, activated carbon, carbon fiber, coke, or organic precursor (phenolic resin, polyacrylonitrile, or cellulose) is heat-treated in an inert atmosphere and synthetic carbon is used. - As shown in
FIG. 2 , theseparator 30 is provided between the positive andnegative electrodes positive electrode 10 and thenegative electrode 20 from each other. By holding an electrolyte solution between thepositive electrode 10 and thenegative electrode 20, theseparator 30 ensures conductivity of the ion. Theseparator 30 is formed in a rectangular shape. The longitudinal length of theseparator 30 is longer than the longitudinal length of thenegative electrode 20 except the portion of thenegative electrode terminal 21 a. - The
separator 30, as shown inFIG. 4 , for example, is formed by laminating a heat-resistant material 32 on one surface of the molten material ormember 31. The heat-resistant material 32 has a melting temperature higher than themelt material 31. When the heat-resistant material 32 that is laminated on themelt material 31 is cut or scraped, the frictional force is changed due to irregularities which occur on the surface of the heat-resistant material 32. Further, if the heat-resistant material 32 that is laminated to themelt material 31 is peeled off, the surface of themelt material 31 is exposed. - A pair of
adjacent separators 30 is bonded with the associated hot-melt material 32 faced to each other. Thus, for example, even when the heat-resistant material 32 is powder which may easily scatter after being applied to themelt material 31 and subsequently dried, the powder may be confined and sealed in the interior of the pair of theadjacent separators 30. That is, even if theelectrical device 1 receives shock or vibrations, it is possible to prevent scattering of the heat-resistant material 32 of theseparator 30. - As the material of the
molten material 31 of theseparator 30, for example, use may be made of a polypropylene. Themolten material 31 is impregnated with a non-aqueous electrolyte solution prepared by dissolving an electrolyte in a non-aqueous solvent. In order to retain the non-aqueous electrolytic solution, use is made to contain a polymer. - As a material of the heat-
resistant material 32 of theseparator 30, for example, use is made of ceramic molded with high temperature inorganic compounds. The ceramic is formed to be porous by binding ceramic particles of silica, alumina, zirconium oxide, titanium oxide with a binder. The material of the heat-resistant material 32 is not limited to ceramic. The alternative is acceptable as long as the melting temperature thereof may be higher than the meltingmember 31. The ceramic particles correspond to the powder, in which the binding effect may be different and the peel strength is thereby affected depending on density and coupling condition of the binder, for example. - As shown in
FIG. 2 , the outer orexterior package 40 may be consisted, for example, oflaminate sheets power generating element 60. When sealing thepower generating element 60 with thelaminate sheets laminate sheet separator 30 or the like is impregnated with a liquid charge. While depressurizing the interior from the open portion of thelaminate sheets - As the material for the
laminate sheets negative electrode 20, use is made of, for example, polyethylene (PE), ionomer, or ethylene vinyl acetate (EVA). As the metal foil of the second layer, for example, use is made of an Al foil or Ni foil. As the resin film of the third layer, for example, use is made of polyethylene terephthalate (PET) or nylon with rigidity. - Now, description is given of a conveying method for conveying a
separator 30 of theelectrical device 1, aseparator conveying apparatus separator welding apparatus 100 with theseparator conveying apparatus separators 30 together, with reference toFIGS. 5 to 7 . -
FIG. 6 is a perspective view showing aseparator welding apparatus 100 provided withseparator conveying apparatus separators 30 together.FIG. 6 is a side view showing the vicinity of theseparator conveying apparatus 500, andFIG. 7 is a side view of the separator conveying apparatus pertaining to Comparative Example. - Here, it is equally acceptable to join the
separators 30 together while conveying by pressurizing theseparators 30 together by aheating press member 710 while heating, and to insert thereafter a positive electrode between a pair of theseparators 30. However, in view of productivity and quality, description is given with respect to such a configuration in which the positive electrode sandwiched by theseparators 30 are joined together by heatingpress member 710 under heat and pressure while being conveyed. - As shown in
FIG. 5 , in the separator joining orwelding apparatus 100, thepositive electrode 10 is held by being wound into a roll around a positiveelectrode winding roller 210. The positiveelectrode winding roller 210 is formed in a cylindrical shape and rotates in a clockwise direction following the rotation of thesuction conveyor 310. Thepositive electrode 10 is carried out from the positiveelectrode winding roller 210 conveyed in the direction of 640 toward a vacuumsuction conveyance drum 540 described below through aconveyance roller 220. - The
suction conveyer 310 consists of an endless belt and provided with a plurality of suction holes on the surface. On the inner circumferential surface of thesuction conveyor 310, a plurality ofrotating rollers 320 is arranged. One of a plurality of therotating rollers 20 is intended for a driving roller, and the others are driven rollers. Thesuction conveyors 310 caused to be rotated in a clockwise direction by the plurality ofrotating rollers 320 are provided in two sets respectively on the conveyance downstream side and the conveyance upstream side of the positive electrode with respect to the vacuum suction conveyance drums 540, 640. - The cutting
members positive electrode 10 are disposed between two sets ofsuction conveyors 310 disposed upstream in the conveyance direction of thepositive electrode 10 with respect to the vacuumsuction conveyance drum member 410 is provided at the tip with a sharp and straight cutting blade and cuts one end of thepositive electrode 10 that is continuous. The cuttingmember 420 is provided with a sharp and bent cutting blade at the tip, and cuts the other end of thepositive electrode 10 immediately after being cut at that one end. The shape of the bent cutting blade of the cuttingmember 420 corresponds to the shape of thepositive electrode terminal 11 a. - One
separator 30 out of the pair ofseparators 30 is held in a roll and wound around theseparator winding roller 510. A melt or fusedmaterial 31 of the oneseparator 30 is in contact with a side of axis of theseparator winding roller 510, Theseparator winding roller 510 is formed in a cylindrical shape and allowed to rotate in counterclockwise direction following the rotation of the vacuumsuction conveyance drum 540 representing the conveying apparatus. The oneseparator 30 is conveyed with a constant tension posed and sandwiched between thepressure roller 520 and thenip roller 530, and is further caused to rotate in a counterclockwise in a state of being vacuum sucked around the vacuumsuction conveyance drum 540. The vacuumsuction conveyance drum 540 is formed in a cylindrical shape with a plurality of suction ports. The oneseparator 30 is cut with a constant width by the cuttingmember 430 which is disposed in the vicinity of the vacuumsuction conveying drum 540 and has a sharp cutting blade at the tip. - As detailed in
FIG. 6 , theseparator conveying apparatus 500 includes apressure roller 520 and a nip roller. Thenip roller 530, formed in a rotatable cylindrical shape or columnar shape, corresponds to a drive member, and is made, at itsnip portion 530 a in contact with themelt material 31 of theseparator 30 of rubber material such as urethane and the like. Thenip roller 530 is allowed to rotate by adrive motor 531 via a shifting gear and the like. Thepressure roller 520 corresponds to a pressurizing member, and is formed in metal at a portion in contact with the heat-resistant material 32 of theseparator 30. Thepressure roller 520 is further formed in a shape of rotatable cylinder or column. Theseparators 30 will be sandwiched by a gap 500 a created between thenip roller 530 and thepressure roller 520. - The nip
rollers melt material 31 representing a base or substrate, not a portion of heat-resistant material 32 which is likely to be peeled or shaved. Therefore, theseparator 30 formed by laminating the heat-resistant material 32 on themelt material 31 maybe conveyed at a constant feed rate or size. Since the niprollers melt material 31, the heat-resistant material will be free from an excessive stress to be applied. Thus, the heat-resistant material 32 of theseparator 30 may be prevented from being peeled off or separated from themelt material 31 or from receiving a contact wound or touching mark. - The
other separator 30 of thepair separators 30 is held wound in a roll around theseparator winding roller 610. Amelt material 31 of theother separator 30 is in contact with a side of axis of theseparator winding roller 610, Theseparator winding roller 610 is formed in a cylindrical shape and allowed to rotate in clockwise direction following the rotation of the vacuumsuction conveyance drum 640 representing the conveying apparatus. Theother separator 30 is conveyed with a constant tension posed and sandwiched between thepressure roller 620 and thenip roller 630, and is further caused to rotate in a clockwise in a state of being vacuum sucked around the vacuumsuction conveyance drum 640. The vacuumsuction conveyer drum 640 is formed in a cylindrical shape with a plurality of suction ports. Theother separator 30 is cut with a constant width by the cutting member 440 which is disposed in the vicinity of the vacuumsuction conveying drum 640 and has a sharp cutting blade at the tip. - The
separator conveying apparatus 600 has a structure similar to that of theseparator conveying apparatus 500. Theseparator conveying apparatus 600 includes apressure roller 520 and a niproller 630. Thenip roller 630, formed in a rotatable cylindrical shape or columnar shape, corresponds to a drive member, and is made, at its nip portion in contact with themelt material 31 of theseparator 30 of rubber material such as urethane and the like. Thenip roller 630 is allowed to rotate by a drive motor (not shown) via a shifting gear and the like. Thepressure roller 620 corresponds to a pressurizing member, and is formed in metal at a portion in contact with the heat-resistant material 32 of theseparator 30. Thepressure roller 520 is further formed in a shape of rotatable cylinder or column. Theseparators 30 will be sandwiched by a gap 500 a created between thenip roller 530 and thepressure roller 520. - The one
separator 30, thepositive electrode 10, and theother separator 30 are conveyed in a laminated state such that the pair of theseparators 30 sandwich thepositive electrode 10 in a gap created between the vacuum suction conveyance drums 540, 640. - The
heating press member 710 is respectively disposed above and below both ends of the pair ofseparators 30 in the longitudinal direction thereof and is configured to sandwich the pair of theseparators 30 and subsequently move up or down to separate from each other. The pair ofseparators 30 sandwiching thepositive electrode 10 are joined or welded to form a pouchedelectrode 50. The pair of theseparators 30 is disposed such that the respective heat-resistant member 32 comes to face each other. Theheating press member 710 is made of stainless steel or copper, for example, and formed in a cuboid shape. Theheating press member 710 is driven to move up and down by a drive unit not shown. Theheating press member 710 will be heated by a heat wire or a heating bulb. - A plurality of the
heating press members 710 sandwich both ends of the pair of theseparators 30 in the longitudinal direction thereof from the vertical direction to join the pair of theseparators 30. At this time, the pair of theseparators 30 is held heated and pressurized by theheating press member 710. Theheating press member 710 is adjusted to a temperature at which themelt material 31 of the pair of theseparators 30 is caused to melt while preventing the heat-resistant material 32 from being melt. Thus, due to themelt material 31 subject to melting by theheating press member 710 being pressurized, the pair of theseparators 30 is joined together. Subsequently, the plurality of theheating press members 710 will be separated from the joined pair of theseparators 30. In the separator welding method described above, the pair ofseparators 30 sandwiching thepositive electrode 10 are subject to heat and pressure by theheating press member 710 to weld the pairedseparators 30. The welding process of a pair ofseparators 30 corresponds to a process for forming so-calledpouched electrode 50 which is excellent in terms of productivity and quality. - A bagged or pouched electrode suction pad 810 places a completed
pouched electrode 50 temporarily on a mounting table 850. The pouched electrode suction pad 810 is plate-shaped and provided with a plurality of suction ports in the surface which is in contact with the pouchedelectrode 50. The pouched electrode suction pad 810 is coupled to an end of atelescopic part 820, which is telescopically extendable by power of the air compressor or the like, for example (not shown). The other end of thetelescopic part 820 is coupled to a plate-shapedsupport member 830. Thesupport member 830 reciprocates along a pair of rails by a rotation motor (not shown), for example. As described, the pouched electrode suction pad 810 moves by thetelescopic part 820,support member 830, and the pair ofrails 840, the pouchedelectrode 50 which has been conveyed by thesuction conveyor 310 to place on the mounting table 850. - According to the conveying method for conveying a
separator 30 of theelectrical device 1 described above, and theseparator conveying apparatus - The
separator conveying apparatus electrical device 1 is intended to convey a laminated body formed by alternately stacking or laminating apositive electrode 10, anegative electrode 20 with a polarity different from thepositive electrode 10 with aseparator 30 interposed there between. Such aseparator 30 is used that includes amelt material 31 representing a base or substrate and a heat-resistant material 32 laminated on one surface of themelt material 31 and having a melting point higher than themelt material 31. The apparatus further includes niprollers separator 30 to convey theseparator 30, and pressrollers rollers separator 30 and driven by thenip rollers rollers melt material 31 of theseparator 30. - With this structure, the nip
rollers resistant material 32 which is likely to be peeled off or shaved, but allowed to contact with themelt material 31 constituting a substrate. Therefore, it is possible to convey theseparator 30 formed by laminating the heat-resistant material 32 on themelt material 31 at a constant feed size. - Thus, a positional deviation does not occur in the
separator 30 formed of alternately laminated electrode and separator assembly. That is, theelectrical device 1 alternately laminated withseparators 30 and electrode is prevented from deterioration or degradation of electrical characteristics due to the displacement of theseparator 30. - Further, with this structure, since the
melt material 31 of theseparator 30 contacts the side of the niprollers 530, 560 which serve to impart a conveying force of theseparator 30 by contacting theseparator 30, no excessive stress is applied to the heat-resistant material 32. Therefore, the heat-resistant material 32 of theseparator 30 is prevented from being peeled off from themolten material 31 or producing contact wound. - Furthermore, with this structure, it is possible to suppress the amount of shaved and scattered heat-
resistant material 32 of theseparator 30. Thus, there is no need to provide a cleaning mechanism for cleaning the heat-resistant material 32 that is shaved and scattered. Even supposing to provide such a cleaning mechanism, it is possible to significantly simplify the structure. - Furthermore, with this structure, when configuring the
separator conveying apparatus 500 in this embodiment by improving the conventional apparatus, it is sufficient for the niprollers press rollers - Moreover, in the present embodiment, the nip
rollers melt material 31 of theseparator 30. Thepressure rollers resistant material 32 of theseparator 30. - With this structure, the nip
rollers separator 30, when urged by thepressure rollers nip portion 530 with a partly recess may be formed. Thus, by way of thenip portion 530 a and the like, a preset friction force may be generated against themelt material 31 of theseparator 30 so that theseparator 30 may be conveyed with its feeding rate maintained at high accuracy. - Further, with this structure, the
pressure rollers resistant material 32 of theseparator 30. Thus, the surface of the rollers may be polished to reduce 620 and thepressure roller 520 includes a heat-resistant material 32 of theseparator 30, reducing the coefficient of friction. The metal formed with reduced coefficient of friction also makes adherence of the heat-resistant material difficult. Even when the heat-resistant material 32 may be attached to thepressure rollers rollers separator 30. - Moreover, in the present embodiment, the heat-
resistant material 32 of the separator to be conveyed may be configured to include a powder applied and dried to themelt material 31. - With this configuration, even when the heat-
resistant material 32 in contact with thepressure roller 520 is applied with a easily scraped powder and is likely produce irregularities on the surface due to scraping to cause a great fluctuations in friction force, the niprollers - Further, in the present embodiment, it is possible to form the powder of ceramic.
- With this configuration, even in the case in which the heat-resistant material which comes into contact with the
pressure roller 520 is made of powder extremely easily scraped such as a ceramic molding of inorganic compound at a high temperature and the friction force undergoes extremely high fluctuations due to the generated irregularities on the surface, the niprollers - In a separator conveying apparatus shown in
FIG. 7 as Comparative Example, thenip roller 1030 corresponding to a drive member contacts the heat-resistant material 32 of the separator, while thepressure roller 1020 corresponding to a pressurizing member is in contact with themolten metal 31 of theseparator 30. By a drivingmotor 1031 via a shifting gear and the like, the nip roller is caused to rotate. Thenip roller 1030 is urged or pressed by thepressure roller 1020 and forms anip portion 1030 a with a part recessed. Aseparator 30 is sandwiched in agap 1000 s between thenip roller 1030 and thepressure roller 1020. With this structure, with respect to thenip roller 1030 which controls a feeding size of theseparator 30, the heat-resistant material 32 is made contact with, which is easier to be shaved or peeled off compared to themelt material 31. Thus, the friction force between thenip roller 1030 and theseparator 30 becomes unstable so that it is impossible to convey the separate at high accuracy of feed rate. - In contrast, in the present embodiment, compared to Comparative Example, the nip
rollers melt material 31 constituting a substrate, not with the heat-resistant material portion which is susceptible of easy shave and separation. Therefore, in the present embodiment, it is possible to convey theseparator 30 composed of laminated body of themelt material 31 and the heat-resistant material 32 at a constant or stable feed rate. - In addition, the present invention is capable of various modifications on the basis of the configuration described in the claims which is held to be within the scope of the present invention.
Claims (5)
1. A conveying apparatus for a separator of an electrical device for conveying a laminated body formed by alternately laminating a first electrode and a second electrode of polarity different from the first electrode with a separator interposed therebetween, the separator including a melt material representing a substrate and a heat-resistant material laminated on one surface of the melt material and having a melting point higher than the melt material, the separator conveying apparatus comprising:
a drive member that is configured to contact the separator for conveying the separator;
a pressure member that is configured to be driven by the drive member while urging the drive member via the separator, wherein the drive member is configured to contact a portion of the melt material of the separator.
2. The conveying apparatus as claimed in claim 1 , wherein the pressure member is formed of an elastic material at a portion in contact with the melt material of the separator.
3. The conveying apparatus as claimed in claim 1 , wherein the heat-resistant material of the separator to be conveyed includes powder applied to the melt material and subsequently dried.
4. The conveying apparatus as claimed in claim 3 , wherein the powder is formed of ceramic.
5. A conveying method for a separator of an electrical device for conveying a laminated body formed by alternately laminating a first electrode and a second electrode of polarity different from the first electrode with a separator interposed therebetween, the separator conveying method comprising:
preparing the separator including a melt material representing a substrate and a heat-resistant material laminated on one surface of the melt material and having a melting point higher than the melt material,
conveying the separator using a drive member that is configured to contact the separator for conveying the separator and a pressure member that is configured to be driven by the drive member while urging the drive member via the separator, wherein the drive member is configured to contact a portion of the melt material of the separator.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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JP2012266495 | 2012-12-05 | ||
JP2012-266495 | 2012-12-05 | ||
PCT/JP2013/081790 WO2014087884A1 (en) | 2012-12-05 | 2013-11-26 | Electrical device separator conveyance device and conveyance method |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2013/081790 A-371-Of-International WO2014087884A1 (en) | 2012-12-05 | 2013-11-26 | Electrical device separator conveyance device and conveyance method |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US15/298,014 Division US9941500B2 (en) | 2012-12-05 | 2016-10-19 | Conveying apparatus and a conveying method of separator of electric device |
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US20150349311A1 true US20150349311A1 (en) | 2015-12-03 |
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Application Number | Title | Priority Date | Filing Date |
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US14/646,243 Abandoned US20150349311A1 (en) | 2012-12-05 | 2013-11-26 | Conveying apparatus and a conveying method of separator of electric device |
US15/298,014 Active US9941500B2 (en) | 2012-12-05 | 2016-10-19 | Conveying apparatus and a conveying method of separator of electric device |
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Application Number | Title | Priority Date | Filing Date |
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US15/298,014 Active US9941500B2 (en) | 2012-12-05 | 2016-10-19 | Conveying apparatus and a conveying method of separator of electric device |
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US (2) | US20150349311A1 (en) |
EP (1) | EP2930772B1 (en) |
JP (1) | JP5983766B2 (en) |
KR (1) | KR101605665B1 (en) |
CN (1) | CN104838523B (en) |
WO (1) | WO2014087884A1 (en) |
Cited By (2)
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US20170173753A1 (en) * | 2014-08-13 | 2017-06-22 | Rodenstock Gmbh | Edging pad having different adhesive zones |
US10355303B2 (en) * | 2015-08-27 | 2019-07-16 | Samsung Sdi Co., Ltd. | Electrode assembly, manufacturing method thereof, and rechargeable battery |
Families Citing this family (4)
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EP2940775B1 (en) | 2012-12-28 | 2019-03-27 | Nissan Motor Co., Ltd | Electrode and method for bonding a separator on the electrode |
DE102017216133A1 (en) | 2017-09-13 | 2019-03-14 | Robert Bosch Gmbh | Method for separating ribbon-shaped electrode and separator material on a curved surface |
JP7528055B2 (en) * | 2019-03-29 | 2024-08-05 | パナソニックホールディングス株式会社 | Stacked electrode body and bonding device for stacked electrode body |
CN217172649U (en) * | 2022-02-28 | 2022-08-12 | 宁德时代新能源科技股份有限公司 | Threading device and baking equipment |
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- 2013-11-26 US US14/646,243 patent/US20150349311A1/en not_active Abandoned
- 2013-11-26 JP JP2014551049A patent/JP5983766B2/en active Active
- 2013-11-26 EP EP13861307.0A patent/EP2930772B1/en active Active
- 2013-11-26 CN CN201380059819.9A patent/CN104838523B/en active Active
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Also Published As
Publication number | Publication date |
---|---|
CN104838523A (en) | 2015-08-12 |
US9941500B2 (en) | 2018-04-10 |
JP5983766B2 (en) | 2016-09-06 |
EP2930772A4 (en) | 2016-04-13 |
US20170047568A1 (en) | 2017-02-16 |
JPWO2014087884A1 (en) | 2017-01-05 |
CN104838523B (en) | 2016-08-24 |
KR101605665B1 (en) | 2016-03-22 |
EP2930772A1 (en) | 2015-10-14 |
WO2014087884A1 (en) | 2014-06-12 |
KR20150070285A (en) | 2015-06-24 |
EP2930772B1 (en) | 2018-01-10 |
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Owner name: NISSAN MOTOR CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SAWADA, YASUHIRO;REEL/FRAME:035682/0253 Effective date: 20150410 |
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