WO2008035495A1 - Pile secondaire et procédé pour fabriquer une pile secondaire - Google Patents
Pile secondaire et procédé pour fabriquer une pile secondaire Download PDFInfo
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- WO2008035495A1 WO2008035495A1 PCT/JP2007/063275 JP2007063275W WO2008035495A1 WO 2008035495 A1 WO2008035495 A1 WO 2008035495A1 JP 2007063275 W JP2007063275 W JP 2007063275W WO 2008035495 A1 WO2008035495 A1 WO 2008035495A1
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- electrode plate
- current collector
- plate
- secondary battery
- negative electrode
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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
- H01M10/36—Accumulators not provided for in groups H01M10/05-H01M10/34
- H01M10/38—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/24—Alkaline accumulators
- H01M10/28—Construction or manufacture
- H01M10/286—Cells or batteries with wound or folded electrodes
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
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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
- H01M50/531—Electrode connections inside a battery casing
- H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49108—Electric battery cell making
- Y10T29/49115—Electric battery cell making including coating or impregnating
Definitions
- the present invention relates to a secondary battery with high output, and more particularly to a secondary battery having a current collecting structure with low resistance and suitable for large current discharge, and a manufacturing method thereof.
- a secondary battery used as a driving power source has been developed as one of important key devices.
- nickel-metal hydride storage batteries and lithium-ion secondary batteries are lightweight, compact, and have high energy density, so they are widely used for mobile phones and other consumer equipment as well as power sources for electric vehicles and power tools.
- lithium ion secondary batteries have been attracting attention as drive power sources, and development for higher capacity and higher output has been activated.
- a secondary battery used as a driving power source is required to have a large output current.
- secondary batteries have been proposed in which the structure of the secondary battery, in particular, the current collecting structure is modified.
- the positive electrode plate and the negative electrode plate are wound through a separator, and the positive electrode plate and the negative electrode plate are joined to the current collector plate via a current collecting tab by welding or the like.
- Current collecting structure is adopted.
- such a current collecting structure has a large electric resistance of the current collecting tab and poor current collecting efficiency, and thus it is difficult to cope with a driving power source that requires a large output current.
- the tabless current collecting structure in which the positive electrode plate and the negative electrode plate are joined to the current collecting plate over the entire surface can reduce the electric resistance, so that the force is suitable for large current discharge. It is necessary to reliably join the end portions of the positive electrode plate and the negative electrode plate to the current collector plate.
- FIG. 16 is a diagram showing the current collecting structure described in Patent Document 1.
- (a) is a cross-sectional view of the current collecting plate 40
- (b) is a positive electrode plate (or negative electrode plate) 41.
- FIG. 5 is a cross-sectional view of a state in which the end of each is joined to a current collector plate 40.
- a groove 40a is formed on the surface of the current collector plate 40 at a position corresponding to the end of the positive electrode plate (or negative electrode plate) 41.
- Positive electrode plate (or negative electrode) 41 is inserted as shown in FIG.16 (b) by inserting the end portion of the plate 41 into the groove portion 40a and melting the portion of the current collector plate 40 forming the groove portion 40a. The part is joined to the current collector plate 40.
- the current collector structure formed by such a method is a metal that forms the current collector plate 40 at the end 42 of the positive electrode plate (or negative electrode plate) 41 at the junction 42 with the current collector plate 40. Therefore, the end of the positive electrode plate (or the negative electrode plate) 41 can be securely joined to the current collector plate 40.
- the groove portion 40a must be formed in the current collector plate 40, and the positive electrode plate (or A positioning technique for inserting the end of the negative electrode plate 41 into the groove 40a is required.
- the manufacturing process becomes complicated and the manufacturing cost becomes high.
- Patent Document 2 describes a method of joining the end of the positive electrode plate (or negative electrode plate) 41 to the current collector plate 40 by a simple method that does not require such alignment.
- FIG. 17 is a cross-sectional view showing a current collecting structure of the secondary battery described in Patent Document 2.
- the positive electrode plate 51 and the negative electrode plate 52 are wound through the separator 53 in a state where the positive electrode plate 51 and the negative electrode plate 52 are shifted in the vertical direction, and project from the separator 53 and end portions 5 la of the negative electrode plate 52 52a is joined to current collector plates 60 and 61 by welding.
- the end portions 51a and 52a of the positive electrode plate 51 and the negative electrode plate 52 are pressed in the winding axis direction (vertical direction in the drawing) to form a flat portion. It is welded to current collector plates 60 and 61.
- the flat portions formed by the positive electrode plate 51 and the negative electrode plate 52 themselves are brought into contact with the current collector plates 60 and 61 and welded.
- the end portions of the positive electrode plate 51 and the negative electrode plate 52 can be joined to the current collector plates 60 and 61 by a simple method.
- the above method has the following problems in reducing the capacity and size of the secondary battery. That is, if the current collector constituting the positive electrode plate 51 or the negative electrode plate 52 is thinned, the thin foil itself cannot obtain mechanical strength, so even if the positive electrode plate 51 or the negative electrode plate 52 is pressed, it is uniform. It becomes difficult to form a flat portion that is bent.
- the current collectors constituting the positive electrode plate 51 and the negative electrode plate 52 of the lithium-ion secondary battery are made of aluminum or copper. Therefore, when the thickness of the current collector is, for example, about 20 m or less, it becomes extremely difficult to form a flat portion by pressing.
- Patent Document 3 describes a technique capable of joining the ends of a positive electrode plate or a negative electrode plate to a current collector plate even if the current collector constituting the positive electrode plate or the negative electrode plate is made thin. ing.
- FIG. 18 is a perspective view showing a configuration of current collector plate 70 described in Patent Document 3.
- a first convex portion 70a and a second convex portion 70b projecting in opposite directions are formed on the surface of a flat plate-shaped current collector plate 70, and a positive electrode plate (or a negative electrode plate)
- a positive electrode plate or a negative electrode plate
- the current collecting structure formed by such a method is as follows.
- the current collecting plate 70 itself can be obtained by simply contacting the end of the positive electrode plate (or the negative electrode plate) 80 with the second protrusion 70b of the current collecting plate 70. Since the melted member formed by melting can be joined to the current collector plate 70, the current collector constituting the positive electrode plate (or the negative electrode plate) 80 is made thin to reduce the mechanical strength. Even in this case, the current collector can be joined to the end plate of the positive electrode plate (or the negative electrode plate) 80 without applying a load.
- Patent Document 1 Japanese Unexamined Patent Publication No. 2006-172780
- Patent Document 2 Japanese Patent Laid-Open No. 2000-294222
- Patent Document 3 Japanese Unexamined Patent Application Publication No. 2004-172038
- Patent Document 3 The method described in Patent Document 3 is, even if the current collector constituting the positive electrode plate or the negative electrode plate is made thin in order to reduce the large capacity of the secondary battery. Force capable of bonding the end of the positive electrode plate or the negative electrode plate to the current collector plate When this method is applied to a mass production process, there are the following problems.
- the volume of the first convex part 70a to be melted, a part of the current collector plate 70 main body part, and the second convex part 70b is a flat plate shape.
- 70 current collectors Since it is larger than the volume of the body part, for example, when excessive energy is applied to melt the second convex part 70b, it is adjacent to the first convex part 70a and the second convex part 70b.
- the current collector plate 70 having a small heat capacity is melted, and a part of the main body of the current collector plate 70 is melted down. Further, when irradiation is performed with an excessive energy that only melts the first convex portion 70a, the second convex portion 70b is not melted and welding cannot be performed.
- the positive electrode plate (or negative electrode plate) 80 is in contact with the current collector plate 70, the molten member produced by melting the current collector plate 70 has no place to flow? Depending on its own weight, the main body of the current collector plate 70 may be separated and fall off.
- the present invention has been made in view of an energetic problem, and its main object is to provide a current collector having a stable junction between a positive electrode plate (or negative electrode plate) and a current collector plate, and suitable for large current discharge. It is to provide a secondary battery having an electric structure.
- the protrusion has a gap on the inner side, the volume of the current collector plate at the portion to be melted is not so different from the volume of the main body portion of the current collector plate that is not melted. Therefore, it is possible to easily determine the magnitude of energy to be applied to the current collector plate (projection).
- the molten member generated by melting the protruding portion passes through the gap portion, and the positive electrode plate (or negative electrode). Since the lead is quickly guided to the end of the electrode plate, the joint at the end of the positive electrode plate (or negative electrode plate) can be welded uniformly and reliably. Furthermore, the melted member produced by melting the protrusions is retained by the interfacial tension in the gap even at the part of the current collector plate where the positive electrode plate (or negative electrode plate) is not in contact. Can prevent mosquitoes falling.
- a method for manufacturing a secondary battery according to the present invention is a method for manufacturing a secondary battery including an electrode group in which a positive electrode plate and a negative electrode plate are arranged with a porous insulating layer interposed therebetween.
- the part is characterized in that it is welded to the current collector plate by a
- the end of the electrode plate is formed on the current collector plate by the molten member generated by melting the protruding portion being guided to the end of the electrode plate through the gap. It is preferable to be welded.
- the molten member produced by melting the protrusion can be quickly guided to the end of the electrode plate through the gap, so that the joint at the end of the electrode plate can be made uniform. And it can be reliably welded.
- the molten member produced by melting the current collector plate is retained by the interfacial tension in the gap, thus preventing falling from the current collector plate. be able to.
- the protrusions are formed radially on one main surface of the current collector plate.
- the electrode group preferably has a configuration in which the positive electrode plate and the negative electrode plate are wound through a porous insulating layer.
- the protrusion is formed on one main surface of the current collector plate in parallel with the stacking direction of the positive electrode plate and the negative electrode plate.
- the electrode group includes a positive electrode plate and It is preferable that the negative electrode plate is laminated with a porous insulating layer interposed therebetween.
- the end of the electrode plate from which the porous insulating layer force also protrudes is in a state where the protruding portion is substantially orthogonal to the direction in which the protrusion extends on one main surface of the current collector plate. Since it contacts the main surface, the end of the electrode plate can be reliably welded to the current collector plate.
- the protruding portion is integrally formed in a state where a gap portion is provided by pressing a current collecting plate having flat plate force. This makes it possible to easily form a protrusion having a gap inside.
- the protrusion is formed such that the height of the protrusion is larger than the thickness of the current collector plate. As a result, a sufficient amount of the melting member can be supplied to the joint at the end of the electrode plate.
- the width of the gap provided inside the protrusion is formed to be equal to or smaller than the thickness of the current collector plate.
- the gap provided inside the protrusion is wide at the open end or narrow at the open end.
- the width and depth of the joint between the electrode plate and the current collector plate can be controlled according to the width of the opening end.
- step (c) all electrode plate end portions of the electrode group are preferably brought into contact with one main surface of the current collector. Thereby, it is possible to prevent a spark from occurring at the end of the electrode plate during welding.
- step (d) at least two or more electrode plate end portions are collected by a melting member formed by melting one protrusion formed on the other main surface of the current collector plate. It is preferably welded to the electric plate.
- Another method for producing a secondary battery according to the present invention is a method for producing a secondary battery comprising an electrode group in which a positive electrode plate and a negative electrode plate are arranged via a porous insulating layer, and at least one of A step (a) of preparing an electrode group in which a positive electrode plate and a negative electrode plate are arranged via a porous insulating layer in a state in which an end portion of a polar plate having a polarity protrudes from the porous insulating layer; Step (b) of preparing a current collector plate in which holes are formed, and the end of the electrode plate protruding from the porous insulating layer cover the current collector A step (c) of contacting the other main surface of the plate, and a step (d) of joining the end of the electrode plate and the current collector plate by flowing molten metal into the through-hole. In d), the end of the electrode plate is welded to the current collector plate by the molten metal guided through the through hole to the end of the
- the molten metal that has flowed into the through hole can be quickly guided to the end of the electrode plate through the through hole, so that the joint at the end of the electrode plate can be welded uniformly and reliably. can do.
- the molten metal that has flowed into the through hole is held by the interfacial tension in the through hole, so that the current collector plate can be prevented from falling. .
- the molten metal is preferably supplied by a melting member formed by heating the filler rod to melt the filler rod.
- the secondary battery according to the present invention includes an electrode group in which a positive electrode plate and a negative electrode plate are arranged via a porous insulating layer, and an end of at least one polar electrode plate is a porous insulating layer cover.
- the end of the protruding electrode plate is joined to the current collector plate in contact with one main surface of the current collector plate, and the end of the electrode plate is connected to the other current collector plate.
- the molten member formed by melting the protrusion formed on the main surface is guided to the end of the electrode plate through the gap provided inside the protrusion and welded to the current collector plate. It is characterized by that.
- the molten member generated by melting the protruding portion is promptly guided to the end portion of the electrode plate through the gap portion, so that the end of the electrode plate that is welded uniformly and reliably The joint part can be obtained.
- the molten member generated by melting the current collector plate is held in the gap portion where it does not fall from the current collector plate.
- the electrode group has a configuration in which a positive electrode plate and a negative electrode plate are wound through a porous insulating layer, and a joint portion at an end portion of the electrode plate is formed on one main surface of the current collector plate. In the inside, it is preferably formed in a radial part.
- the electrode group has a configuration in which a positive electrode plate and a negative electrode plate are laminated via a porous insulating layer, and a joint portion at the end of the electrode plate is formed on one main surface of the current collector plate. Inside, it is formed in a part parallel to the stacking direction of the positive electrode plate and the negative electrode plate! It is preferable that
- the end of the electrode plate from which the porous insulating layer force also protrudes is in a state where the protruding portion is substantially orthogonal to the direction in which the protrusion extends on one main surface of the current collector plate. Therefore, it is possible to obtain a joint portion of the end portion of the electrode plate that is reliably welded.
- the other main surface of the current collector plate at the portion where the joint portion of the end portion of the electrode plate is formed is a concave portion. Thereby, the state of the welded electrode plate end joint can be confirmed visually.
- the protruding portion is formed in a state where the end portion of the positive electrode plate (or the negative electrode plate) is in contact with the current collector plate in which the protruding portion having the gap portion is formed inside.
- the end of the positive electrode plate (or negative electrode plate) is collected by quickly melting the molten member formed by melting and projecting the projecting portion through the gap to the end of the positive electrode plate (or negative electrode plate). It can be welded uniformly and reliably to the electric plate.
- a secondary battery having a current collecting structure suitable for high-current discharge can be realized, which includes a stable junction between the positive electrode plate (or negative electrode plate) and the current collector plate.
- FIG. 1 is a diagram showing a current collection structure of a secondary battery in a first embodiment of the present invention.
- (a) is a diagram showing a state in which the end portion of the electrode plate is in contact with the current collector plate
- (b) is a diagram showing a state in which the end portion of the electrode plate is in contact with the current collector plate.
- FIGS. 2 (a) and 2 (b) are development views of a positive electrode plate and a negative electrode plate in the first embodiment.
- FIG. 3 (a) is a perspective view showing the configuration of the electrode group in the first embodiment
- FIG. 3 (b) is a plan view showing the configuration of the current collector plate
- FIG. 3 (c) is a diagram.
- FIG. 3B is a cross-sectional view of the protrusion along IIIc IIIc.
- FIG. 4 is a cross-sectional view showing the configuration of the secondary battery in the first embodiment.
- FIG. 5 shows (a) to (c) in the shape of the protrusion in the first embodiment, and the joint It is a diagram showing the shape
- FIG. 6 (a) is a perspective view showing the configuration of the electrode group in the first embodiment
- FIG. 6 (b) is a plan view showing the configuration of the current collector plate
- FIG. 6 (c) is a diagram. 6 (b) Vic—A cross-sectional view of the protrusion along Vic.
- Fig. 7 is a diagram showing a current collecting structure in the first embodiment.
- (A) is a diagram showing a state in which an end portion of the electrode plate is in contact with the current collector plate
- (b) is an electrode diagram. It is the figure which showed the state which joined the board edge part to the current collecting plate.
- FIG. 8 is a view showing a state in which it is joined to the electrode plate end plate in the first embodiment.
- FIGS. 9 (a) and 9 (b) are plan views showing a configuration of a current collector plate in a modification of the first embodiment.
- FIGS. 10 (a) and 10 (b) are plan views showing a configuration of a current collector plate in a modification of the first embodiment.
- FIGS. L l (a) to (c) are cross-sectional views showing the shape of the protrusions in the modification of the first embodiment.
- FIGS. 12 (a) and 12 (b) are exploded views of the positive electrode plate and the negative electrode plate in the modification of the first embodiment.
- FIG. 13 is a cross-sectional view showing a configuration of a secondary battery according to a modification of the first embodiment.
- FIGS. 14 (a) to (d) are cross-sectional views showing the structure of a current collector plate in a second embodiment of the present invention.
- FIGS. 15 (a) to 15 (c) are plan views showing an arrangement of through holes in the second embodiment.
- Fig. 16 is a diagram showing a current collector structure of a conventional secondary battery, (a) is a diagram showing the configuration of the current collector plate, and (b) is a diagram illustrating the electrode plate end as a current collector plate. It is the figure which showed the state which joined.
- FIG. 17 is a cross-sectional view showing a current collecting structure of a conventional secondary battery.
- FIG. 18 is a perspective view showing a configuration of a current collector plate of a conventional secondary battery.
- Negative electrode plate edge (Negative electrode mixture uncoated part)
- FIG. 1 is a diagram schematically showing a current collecting structure of the secondary battery in the first embodiment of the present invention.
- FIG. 1 (a) is a diagram in which an end la of the positive electrode plate is brought into contact with the positive electrode current collecting plate 10.
- FIG. 5B is a cross-sectional view showing a state in which the end la of the positive electrode plate is joined to the positive current collector plate 10.
- the present invention can be applied to the end portion 2a of the negative electrode plate and the negative electrode current collector plate 11, and therefore, in the following description, the positive electrode and the current collector plate are simply referred to without distinguishing between positive and negative polarities. .
- the present invention is applicable to only one polarity.
- the current collector plate 10 is formed with a protruding portion 12 having a gap portion 12a inside on a part of one main surface 10a (upper surface in the drawing). .
- An electrode plate end la from which a porous insulating layer force to be described later protrudes is in contact with the other main surface 10b of the current collector plate 10.
- the direction in which the protruding portion 12 extends (the direction of the arrow X) is substantially orthogonal to the direction in which the electrode plate end la extends (the direction of the arrow Y).
- the protrusion 12 is melted by locally heating the protrusion 12 in this state, as shown in FIG. 1 (b), the molten member generated by melting the protrusion 12 is obtained. Then, it is guided to the electrode plate end la through the gap 12a, and the electrode plate end la and the current collector plate 10 are welded to each other at the joint 9 by the molten material. Since the protrusion 12 is melted in a region having a certain width, the electrode plate end la is welded to the both surfaces by a melting member. Further, if the region where the protrusion 12 is melted extends to a portion where the adjacent electrode plates abut, two or more electrode plate end portions la can be welded to the current collector plate 10 at the same time.
- the projecting portion 12 is melted and a molten member is generated also in the portion of the current collector plate 10 where the electrode plate end la is not in contact, but the generated molten member is the gap portion 12a. It is held by the interfacial tension inside, so that it does not fall from the current collector plate 10.
- the joining portion 9 at the end portion la of the electrode plate is formed as shown in FIG. 1 (b).
- the surface of the current collector plate 10 at the portion formed is a recess.
- the current collector constituting the electrode plate is thin, in order to prevent deformation of the electrode plate end la when the electrode plate end la is in contact with the current collector plate 10
- the end la is preferably brought into contact with the current collector plate 10 substantially vertically. In this way, the molten member produced by melting the protruding portion 12 can be uniformly guided to both surfaces of the electrode plate end la, and a more stable joint 9 can be obtained.
- the positive electrode mixture was applied in a strip shape in the width direction of the positive electrode current collector.
- a negative electrode plate 2 having an uncoated portion 2a is prepared.
- the end portion of the positive electrode plate 1 (uncoated portion la) and the end portion of the negative electrode plate 2 (uncoated portion 2a) are opposite to each other.
- the positive electrode plate 1 and the negative electrode plate 2 are spirally wound through the porous insulating layer to form the electrode group 4.
- the porous insulating layer is, for example, a microporous film made of a resin having a shutdown function, or a heat resistance containing such a microporous film and insulating particles not having a shutdown function. It consists of a laminated film with a porous porous film.
- FIG. 3B a disc-shaped positive current collector plate 10 and negative electrode current collector plate 11 are prepared, and protrusions 12 are radially formed on the surfaces thereof.
- FIG. 3C is a cross-sectional view of the protrusion 12 along the Hie Ilk of FIG. 3B, and a gap 12a is formed inside the protrusion 12.
- the projecting portion 12 can be formed integrally with the current collector plates 10 and 11 by, for example, pre-stressing the current collector plates 10 and 11 having a flat plate force with a gap. it can.
- the current collector plates 10 and 11 can be formed by pressing, forging, forging, or the like.
- the electrode plate end portions la and 2 a are formed radially on the surfaces of the current collector plates 10 and 11.
- the projecting portion 12 is generally perpendicular to any portion.
- the electrode group 4 shown in FIG. 3 (a) is applied to the current collector plates 10 and 11 shown in FIG. 3 (b) in the state shown in FIG. 1 (a).
- the electrode plate ends la and 2 a and the current collector plates 10 and 11 are welded to each other by a molten material generated by melting the protrusion 12.
- the electrode plate end portions la and 2a are substantially orthogonal to the protrusions 12 formed on the surfaces of the current collector plates 10 and 11 in any part, the electrode plate end portions la and 2a are It can be securely welded to the current collector plates 10 and 11.
- FIG. 4 is a cross-sectional view showing the structure of a secondary battery in which the current collecting structure formed by the above method is accommodated in the battery container 13 and completed.
- the negative electrode current collector plate 11 is connected to the bottom of the battery container 13, and the positive electrode current collector plate 10 is connected to the sealing plate 16 via the positive electrode lead 15. Further, a nonaqueous electrolyte (not shown) is injected into the battery container 13 and sealed with a sealing plate 16 via a gasket 17.
- the melted member generated by melting the protruding portion 12 is promptly guided to the electrode plate end portions la and 2a through the gap portion 12a. Therefore, it is possible to obtain a joint portion of the electrode plate end portions la and 2a that is uniformly and reliably welded. Further, even in the region of the current collector plates 10 and 11 where the electrode plate end portions la and 2a are not in contact with each other, the molten member formed by melting the protruding portion 12 does not fall from the current collector plates 10 and 11. It is held in the gap 12a. As a result, a secondary battery having a current collector structure having a stable electrode plate end la, 2a and current collector plates 10 and 11 and having excellent reliability and suitable for large current discharge can be realized. Togashi.
- the inventors of the present application have studied the shape of the protruding portion 12, but by changing the shape of the gap portion 12a formed inside the protruding portion 12, the electrode plate end portions la and 2a are joined. We found that the shape of part 9 can be controlled.
- FIGS. 5 (a) to 5 (c) schematically show the relationship between the shape of the gap 12a formed inside the protrusion 12 and the shape of the joint 9 of the electrode plate end portions la and 2a.
- FIG. 5 (a) to (c) the left figure shows a state in which the electrode plate end portions la and 2a are in contact with the current collecting plates 10 and 11, and the right figure shows a state in which the protrusion 12 is melted.
- the electrode plate ends la and 2a are welded to the current collector plates 10 and 11, respectively.
- the gap 12a in the protrusion 12 shown in Fig. 5 (a) has a shape with a substantially constant width W.
- the joint 9 of the electrode plate end la, 2a The molten part produced by melting has a shape that spreads on the surface of the electrode plate end la, 2a.
- the gap portion 12a in the protrusion 12 shown in FIG. 5 (b) has a shape in which the opening end is wider than the width W.
- the electrode plate end portions la and 2a are joined to each other.
- Part 9 has protrusion 12
- the molten member produced by melting has a shape that spreads shallowly on the surface of the electrode plate end la, 2a
- the gap 12a in the protrusion 12 shown in FIG. 5 (c) has a shape in which the opening end is narrower than the width W.
- the joint between the electrode plate ends la and 2a No. 9 has a shape in which the molten member produced by melting the protruding portion 12 has a surface that is narrowly spread over the surfaces of the electrode plate end portions la and 2a.
- the shape of the joint portion 9 of the electrode plate end la, 2a can be controlled.
- the gap 12a is shaped as shown in Fig. 5 (b), and the area of the joint 9 is increased to strengthen the joint.
- the gap 12a may be shaped as shown in FIG. 5 (c).
- the height H of the protrusion 12 is preferably formed larger than the thickness T of the current collector plates 10 and 11. Even if the height H of the protrusion 12 is increased without changing the thickness of the main body of the current collector plates 10 and 11, the thickness of the protrusion 12 itself does not change, so the energy to be applied to the protrusion 12
- the molten member produced by melting the protruding portion 12 is continuously guided through the gap portion 12a to the electrode plate end portions la and 2a quickly. La and 2a joints can be welded uniformly and reliably.
- the width W of the gap portion 12a provided inside the protruding portion 12 is preferably formed to be equal to or less than the thickness T of the current collector plates 10 and 11. Specifically, it is preferably 0.5 mm or less, more preferably 0.2 mm or less. As a result, even when the current collector plates 10 and 11 are not in contact with the electrode plates 1 and 2, the melted member produced by melting the current collector plates 10 and 11 is interfacial tension in the gap 12a. Therefore, it is possible to more reliably prevent the current collector plates 10 and 11 from falling.
- the preferred width W of the gap 12a can be determined as appropriate depending on the material of the current collector plates 10 and 11, the heating conditions for melting the protrusion 12, and the like.
- the electrode group 4 shown in FIG. 3 (a) has a configuration in which the positive electrode plate 1 and the negative electrode plate 2 are spirally wound through the porous insulating layer. ),
- the positive electrode plate 1 and the negative electrode plate 2 may be laminated via a porous insulating layer (not shown).
- the positive electrode plate 1 and the negative electrode plate 2 are porously insulated with the end la of the positive electrode plate 1 and the end 2a of the negative electrode plate 2 protruding from the porous insulating layer in opposite directions, for example. It is formed by laminating through layers.
- the electrode group 4 having such a configuration rectangular plates are used as the current collector plates 10 and 11, as shown in FIG. 6 (b).
- the protrusions 12 formed on the surfaces of the current collector plates 10 and 11 are formed in parallel to the stacking direction (the direction of arrow D) of the positive electrode plate 1 and the negative electrode plate 2.
- the protruding portion 12 has a gap portion 12a formed inside the protruding portion 12.
- the stacking direction of the positive electrode plate 1 and the negative electrode plate 2 and the protruding portion 12 are formed in parallel to each other, the end portion la of the positive electrode plate 1 and the end portion 2a of the negative electrode plate 2 are collected.
- the protrusions 12 formed on the surfaces of the electric plates 10 and 11 are almost perpendicular to each other.
- the electrode group 4 shown in Fig. 6 (a) is brought into contact with the current collector plates 10 and 11 shown in Fig. 6 (b), and the protrusions 12 are locally heated, whereby an electrode plate is obtained.
- the end portions la and 2a and the current collector plates 10 and 11 can be welded uniformly and reliably by the molten member formed by melting the protruding portions 1 and 2.
- the electrode plate end portions la and 2a are preferably orthogonal to the protruding portions 12 formed on the surfaces of the current collector plates 10 and 11,
- the effect of the present invention is achieved. Obtainable.
- the gap portion 12a in the projecting portion 12 has a shape in which the opening end is wider than the width W as shown in FIG. In this way, the melted member produced by melting the protruding portion 12 spreads over the lower surface of the current collector plates 10 and 11, so that it is separated from the protruding portion 12 as shown in FIG. 7 (b).
- the molten material is supplied up to the junction 9 of the electrode plate end portions la and 2a, and the electrode plate end portions la and 2a can be welded to the current collector plates 10 and 11, respectively.
- the electrode plates of the electrode group are relatively dense, at least two or more electrode plate end portions la and 2a are formed on the surfaces of the current collector plates 10 and 11.
- the plurality of electrode plate end portions la and 2a are collectively welded to the current collector plates 10 and 11 by a molten member generated by melting by bringing them into contact with the vicinity of the one protruding portion 12 formed. be able to.
- the secondary battery according to the present invention includes a stable electrode plate end, a current collector plate,
- the current collector structure is excellent in reliability and suitable for large current discharge, but in particular, the current collector of the positive electrode plate or the negative electrode plate has a film thickness of 50 m or less, more preferably For high-power lithium-ion secondary batteries that use aluminum foil or copper foil of 20 m or less, etc.
- FIG. 3 (c) a suitable example of the shape of the protrusion 12 formed on the surfaces of the current collector plates 10 and 11 is shown in FIG. 3 (c), but not limited thereto, it has various shapes.
- the protrusion 12 can be applied to the present invention.
- FIGS. 9 (a) and 9 (b) are diagrams showing the shape of the protrusion 12 formed on the surfaces of the current collector plates 10 and 11, and as shown in FIG. 3 (a), the positive electrode plate
- the present invention can be applied to an electrode group in which 1 and the negative electrode plate 2 are spirally wound through a porous insulating layer.
- FIG. 9 (a) is a diagram showing a modification of the shape of the protrusions 12 formed in parallel on the surfaces of the current collector plates 10 and 11, in a plurality of rows.
- the protruding portion 12 having such a shape is a current collecting plate 10 or 1 having a flat plate force.
- the end portion la of the positive electrode plate 1 and the end portion 2 a of the negative electrode plate 2 are in contact with the current collector plates 10 and 11.
- the projections 12 intersect with the projections 12 at various angles, but can be reliably welded to the electrode plate end la and the electric plates 10 and 11 by appropriately setting the intervals at which the projections 12 are arranged. .
- FIG. 9 (b) is a diagram showing a modification of the shape of the protruding portion 12 that is independently formed on the surfaces of the current collector plates 10 and 11. In this case, if the independent protrusion 12 is irradiated with energy in a spot manner, the temperature rise during welding can be suppressed.
- FIGS. 10 (a) and 10 (b) are suitable for an electrode group in which a positive electrode plate 1 and a negative electrode plate 2 wound through a porous insulating layer are compressed and deformed into a flat shape. It is the figure which showed the example of the protrusion part 12 which can be applied to.
- the protrusion 12 shown in FIG. 10 (a) is formed in a direction perpendicular to the long and short sides of the rectangular current collector plates 10 and 11.
- the projecting portion 12 formed in this way is substantially vertical at the end la of the positive electrode plate 1 and the end portion 2a of the negative electrode plate 2, and the portions that contact the current collector plates 10 and 11. Therefore, the end portions la and 2a of the electrode plate can be uniformly and reliably welded to the current collector plates 10 and 11, respectively.
- a plurality of protrusions 12 shown in FIG. 10 (b) are independently formed on the surfaces of the current collector plates 10 and 11. As shown in FIG. In this case, if the independent protrusion 12 is irradiated with energy in a spot manner, the temperature rise during welding can be suppressed.
- FIGS. 11 (a) to 11 (c) are diagrams showing modified examples of the shape of the gap portion 12 a formed inside the protruding portion 12.
- the gap portion 12a shown in FIG. 11 (a) is wide at the open end, and in this case, the molten member force generated by melting the protruding portion 12 is formed on the surface of the electrode plate end portions la and 2a. Since it is guided over a wide area, it is suitable for welding a plurality of electrode plate ends la, 2a to current collector plates 10, 11 at once.
- the gap 12a shown in FIG. 11 (b) is narrow at the opening end.
- the melt member force generated by melting the protrusion 12 is the end of the electrode plate end la, 2a. Since it is guided narrowly to the surface, it is suitable for more strongly joining the electrode plate ends la and 2a to the current collector plates 10 and 11.
- the gap 12a shown in FIG. 11 (c) has a protrusion (or tongue piece) 12b at the opening end, the molten member produced by melting the protrusion 12 is collected. Since it is guided to the surface of the electrode plate edges la and 2a without detaching from the electric plates 10 and 11, a highly reliable joint can be obtained.
- the electrode plate ends la and 2a are uncoated portions la to which no mixture is applied.
- the current collector constituting the positive electrode plate 1 (or the negative electrode plate 2) is thin, the electrode plate ends la and 2a are brought into contact with the current collector plates 10 and 11, respectively.
- the joint portion 9 of the electrode plate end portions la and 2a is welded, the electrode plate end portions la and 2a may be bent.
- FIG. 12 (a) and 12 (b) show the configurations of the positive electrode plate 1 and the negative electrode plate 2 in which the reinforcing layer 30 is provided on part of the end portion la of the positive electrode plate 1 and the end portion 2a of the negative electrode plate 2.
- FIG. 12 (a), (b) As shown in FIG. 4, the reinforcing layer 30 is provided in a portion welded to the current collector plates 10 and 11 in the uncoated portions la and 2a to which the mixture is not applied.
- the reinforcing layer 30 is preferably formed to a thickness that is the same as or thinner than the thickness of the mixture coating portions lb, 2b. This prevents bending of the electrode plate ends la and 2a without reducing the number of times the electrode group is wound.
- the reinforcing layer 30 is made by kneading, for example, an inorganic oxide filler such as alumina, a binder, and an appropriate amount of N-methyl-2-pyrrolidone (hereinafter referred to as “NMP”).
- NMP N-methyl-2-pyrrolidone
- FIG. 13 shows the electrode group 4 after the positive electrode plate 1 and the negative electrode plate 2 shown in FIGS. 12 (a) and 12 (b) are spirally wound through the porous insulating layer 3 to form the electrode group 4.
- FIG. 5 is a cross-sectional view showing the structure of a secondary battery in which a current collecting structure formed by welding group 4 to current collecting plates 10 and 11 is housed in a battery container 13 and completed.
- the protrusion 12 having the gap 12a on the inner side is melted, and the molten member generated by melting the protrusion 12 is passed through the gap 12a and the end of the electrode plate.
- the force that is obtained by welding the end portions la and 2a of the electrode plate to the current collector plates 10 and 11 by guiding them to la and 2a According to the present embodiment, the forceful melting member is supplied from the outside. It is a thing.
- FIG. 14 (a) is a cross-sectional view schematically showing the configuration of the current collector plates 10 and 11 in the present embodiment.
- the current collector plates 10 and 11 have a plurality of through holes 20 (in the drawing). Only one is displayed). Then, for example, as shown in FIG. 3 (a) or FIG. 6 (a), a current collector plate 10 in which a plurality of through holes 20 are formed on an electrode plate end la, 2a protruding from the porous insulating layer.
- the electrode plate end portions la and 2a are joined to the current collector plates 10 and 11 by welding.
- the molten metal that has flowed into the through hole 20 can be quickly guided to the electrode plate end portions la and 2a through the through hole 20, so that the electrode plate The joint between the end portions la and 2a can be welded uniformly and reliably.
- the molten metal that has flowed into the through-hole 20 is retained in the through-hole 20 by the interfacial tension even in the current collector plates 10 and 11 where the electrode plate ends la and 2a are not in contact. Can prevent falling from current collector plate 10, 11 .
- a secondary battery having a current collector structure suitable for large-current discharge can be realized, which includes a stable junction between the electrode plate end portions la and 2a and the current collector plates 10 and 11.
- the molten metal can be supplied by, for example, a melting member formed by melting the melt rod by heating the melt rod.
- the size W of the through hole 20 is preferably formed to be equal to or smaller than the thickness of the current collector plates 10 and 11. Specifically, it is preferably 0.5 mm or less, more preferably 0.2 mm or less. In this way, even in the region of the current collector plates 10 and 11 where the electrode plate end portions la and 2a are not in contact with each other, the molten metal force that has flowed into the through hole 20 is retained by the interfacial tension. Further, it is possible to more reliably prevent the current collector plates 10 and 11 from falling.
- FIG. 15 (a) to 15 (c) are diagrams showing an example of the arrangement of the through holes 20 formed in the current collector plates 10 and 11, and these current collector plates 10 and 11 are the positive electrode plate 1
- the present invention can be applied to an electrode group formed by winding the negative electrode plate 2 in a spiral shape.
- FIG. 15 (a) shows an example in which the through holes 20 are arranged radially on the surfaces of the current collector plates 10 and 11.
- FIG. 15 (b) shows the through holes 20 on the surfaces of the current collector plates 10 and 11.
- FIG. 15 (c) shows an example in which the through holes 20 are arranged at a plurality of locations on the surfaces of the current collector plates 10 and 11, respectively.
- these through holes 20 can be formed, for example, by punching a press, and therefore can be formed more easily than the protrusions 12 in the first embodiment. it can.
- lithium cobaltate powder 85 parts by weight of lithium cobaltate powder as the positive electrode active material and carbon powder as the conductive agent
- a positive electrode mixture was prepared by mixing 10 parts by weight and 5 parts by weight of polyvinylidene fluoride (PVDF) as a binder.
- PVDF polyvinylidene fluoride
- the positive electrode mixture was applied to both surfaces of a positive electrode current collector made of an aluminum foil having a thickness of 15 ⁇ m and a width of 56 mm, and after drying the positive electrode mixture, the positive electrode mixture coating portion was rolled. A positive electrode plate having a thickness of 150 m was produced. At this time, the width of the positive electrode mixture coated portion was 50 mm, and the width of the positive electrode mixture uncoated portion was 6 mm.
- a negative electrode mixture was prepared by mixing 95 parts by weight of artificial graphite powder as the negative electrode active material and 5 parts by weight of PVDF as the binder.
- the negative electrode mixture was applied to both surfaces of a negative electrode current collector of copper foil having a thickness of m and a width of 57 mm, and after drying the negative electrode mixture, the negative electrode mixture coating portion was rolled to obtain a thickness. Produced a negative electrode plate of 160 m. At this time, the width of the negative electrode mixture coated portion was 52 mm, and the width of the negative electrode mixture uncoated portion was 5 mm.
- the porous plate made of a polypropylene resin microporous film having a width of 53 mm and a thickness of 25 m so as to cover the positive electrode mixture coating portion and the negative electrode mixture coating portion.
- the electrode group was produced by spirally winding through the insulating layer.
- the electrode group produced as described above is brought into contact with the positive electrode current collector plate and the negative electrode current collector plate, and the electrode group is welded to the positive electrode current collector plate and the negative electrode current collector plate by TIG (Tungsten Inert Gas) welding.
- TIG Tungsten Inert Gas
- a current collector structure was fabricated. At this time, the TIG welding conditions were a current of 120 A and a time of 50 ms for both the positive current collector and the negative current collector.
- the current collecting structure produced as described above was inserted into a cylindrical battery container opened on only one side, and after the negative electrode current collector plate was resistance welded to the battery container, an insulating plate was interposed between the positive electrode current collector.
- the part plate and the sealing plate were laser welded to the battery container via an aluminum positive electrode lead.
- a nonaqueous electrolyte was injected into the battery container, and then the sealing plate was caulked with a battery container through a gasket and sealed, with a diameter of 26 mm and a height of 65 mm.
- a cylindrical lithium ion secondary battery (sample 1) with a design capacity of 2600 mAh was manufactured.
- through holes are provided in the current collector plate.
- An aluminum plate having a thickness of 0.5 mm and a 50 mm square was punched with a press to form through holes having a diameter of 0.2 mm radially on the surface of the aluminum plate.
- This aluminum plate was punched out with a press to produce a disc-shaped positive electrode current collector with a diameter of 24 mm and a hole with a diameter of 7 mm in the center.
- a negative electrode current collector plate made of a 0.3 mm thick copper plate was prepared. Made.
- the electrode group created in the same manner as in Example 1 is brought into contact with the positive electrode current collector plate and the negative electrode current collector plate prepared as described above, and the copper filler rod is melted by TIG welding to penetrate the molten metal. It flowed into the hole, and the electrode group was welded to the positive electrode current collector plate and the negative electrode current collector plate to produce a current collector structure.
- the TIG welding conditions were a current of 120 A and a time of 30 ms for the positive current collector, and a current of 120 A and a time of 50 ms for the negative current collector.
- a lithium-ion secondary battery (sample 2) was produced in the same manner as in Example 1 using the current collecting structure created by the above method.
- a reinforcing layer is provided at each end of the positive electrode plate and the negative electrode plate produced in Example 1.
- alumina as an inorganic oxide filler and a polyacrylonitrile-modified rubber binder were kneaded with N-methylpyrrolidone (NMP) to prepare a slurry for a reinforcing layer.
- NMP N-methylpyrrolidone
- the prepared slurry was applied with a width of 4 mm and a thickness of 62.5 m to a part of the positive electrode mixture uncoated portion in contact with the positive electrode mixture coated portion, and then the slurry was dried to be reinforced. A layer was formed. The thickness of the reinforcing layer at this time was almost the same as the thickness of the positive electrode mixture coating portion. In the same manner, a reinforcing layer having a width of 4 mm and a thickness of 75 m was also formed on the negative electrode plate.
- a lithium ion secondary battery (Sample 3) was produced in the same manner as in Example 1 using the positive electrode plate and the negative electrode plate produced by the above method.
- the positive electrode plate end and the negative electrode plate end were each pressed in the direction of the winding axis to form a flat surface. Then, the flat surface at the end of the positive electrode plate was brought into contact with a positive electrode current collector plate (thickness 0.5 mm, diameter 24 mm) made of aluminum, and the flat surface at the end of the positive electrode plate was welded to the positive electrode current collector plate by laser welding. . Same The flat surface at the end of the negative electrode plate was in contact with a negative electrode current collector plate (thickness 0.3 mm, diameter 24 mm) made of copper, and the flat surface at the end of the negative electrode plate was welded to the negative electrode current collector plate by laser welding. . At this time, the laser welding conditions were a current of 125 A and a time of 1.2 seconds for the positive current collector, and a current of 95 A and a time of 1.4 seconds for the negative current collector.
- a lithium-ion secondary battery (Sample 4) was produced in the same manner as in Example 1 using the current collecting structure produced by the above method.
- a lithium ion secondary battery (Sample 5) was produced in the same manner as in Example 1 using the positive electrode current collector plate and the negative electrode current collector plate produced by the above method.
- the tensile strength between the electrode plate terminal and the current collector plate was measured by extracting 5 pieces from each sample. Specifically, with the electrode group held on one side of the tensile tester and the current collector plate held on the other side, the tensile strength was determined by pulling in the axial direction at a constant speed and releasing the joint. .
- the average internal resistance value of Sample 1 and Sample 3 was 6 ⁇ , and the variation was about 10%.
- the average internal resistance was 5.8 m ⁇ , and the variation was about 5%.
- the average internal resistance value of Sample 4 was 11 m ⁇ , and the variation was 20%.
- Sample 5 had an average internal resistance of 12.3 ⁇ ⁇ and a variation of 30% or more.
- the average output current (I) is calculated from the measured internal resistance (R) of each sample.
- R ( Resistance) XI (current) ⁇ 2.7V (voltage)
- Sample 5 11/1000 X 1 2. 7
- Samples 1 to 3 have resistance values that enable large current discharge.
- the present invention has been described with the preferred embodiment, such description is not a limitation, and various modifications are possible.
- the surface of the current collector plate at the portion where the junction at the end of the electrode plate is formed is a concave portion, but the surface of the current collector plate is convex without melting part of the protruding portion. It may be a part.
- the protruding portion is melted by TIG welding, for example, the protruding portion may be melted by irradiation with a laser or an electron beam.
- the secondary battery to which the present invention is applied can be applied to a nickel-metal hydride storage battery in addition to a lithium ion secondary battery in which the type is not particularly limited. Moreover, the same effect can be obtained when applied to an electrochemical element (for example, a capacitor) having the same current collecting structure as the present invention.
- an electrochemical element for example, a capacitor
- the present invention is useful for a secondary battery having a current collector structure suitable for large current discharge, which includes a junction between a stable positive electrode plate (or negative electrode plate) and a current collector plate. It can be applied to batteries for driving power tools and electric vehicles that require power, large-capacity backup power supplies, power storage battery batteries, and the like. Furthermore, it can be applied to capacitors having the same current collecting structure (capacitor element).
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Connection Of Batteries Or Terminals (AREA)
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Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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CN2007800351010A CN101517785B (zh) | 2006-09-20 | 2007-07-03 | 二次电池和二次电池的制造方法 |
EP07768049A EP2071649A1 (en) | 2006-09-20 | 2007-07-03 | Secondary battery and method for manufacturing secondary battery |
KR1020097006179A KR101057954B1 (ko) | 2006-09-20 | 2007-07-03 | 이차전지 및 이차전지의 제조방법 |
US12/441,499 US7976979B2 (en) | 2006-09-20 | 2007-07-03 | Secondary battery and method for manufacturing secondary battery |
US12/845,494 US8142922B2 (en) | 2006-09-20 | 2010-07-28 | Secondary battery and method for manufacturing secondary battery |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006-254233 | 2006-09-20 | ||
JP2006254233 | 2006-09-20 |
Related Child Applications (2)
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US12/441,499 A-371-Of-International US7976979B2 (en) | 2006-09-20 | 2007-07-03 | Secondary battery and method for manufacturing secondary battery |
US12/845,494 Division US8142922B2 (en) | 2006-09-20 | 2010-07-28 | Secondary battery and method for manufacturing secondary battery |
Publications (1)
Publication Number | Publication Date |
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WO2008035495A1 true WO2008035495A1 (fr) | 2008-03-27 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2007/063275 WO2008035495A1 (fr) | 2006-09-20 | 2007-07-03 | Pile secondaire et procédé pour fabriquer une pile secondaire |
Country Status (5)
Country | Link |
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US (2) | US7976979B2 (ja) |
EP (1) | EP2071649A1 (ja) |
KR (1) | KR101057954B1 (ja) |
CN (1) | CN101517785B (ja) |
WO (1) | WO2008035495A1 (ja) |
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WO2009128335A1 (ja) * | 2008-04-14 | 2009-10-22 | トヨタ自動車株式会社 | 電池およびその製造方法 |
US20110086258A1 (en) * | 2008-08-25 | 2011-04-14 | Hironori Yaginuma | Method for manufacturing secondary battery and secondary battery |
CN110048065A (zh) * | 2018-01-17 | 2019-07-23 | 三洋电机株式会社 | 二次电池及其制造方法 |
JP7128666B2 (ja) | 2018-06-11 | 2022-08-31 | Fdk株式会社 | 二次電池 |
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JP2009110751A (ja) * | 2007-10-29 | 2009-05-21 | Panasonic Corp | 二次電池 |
WO2009096160A1 (ja) * | 2008-01-28 | 2009-08-06 | Panasonic Corporation | 二次電池用集電端子板、二次電池および二次電池の製造方法 |
JP5380985B2 (ja) | 2008-09-30 | 2014-01-08 | パナソニック株式会社 | キャパシタの製造方法及びキャパシタ |
KR101093696B1 (ko) | 2009-12-01 | 2011-12-15 | 삼성에스디아이 주식회사 | 이차 전지 |
KR101173865B1 (ko) | 2010-06-23 | 2012-08-14 | 삼성에스디아이 주식회사 | 이차 전지 |
US9343726B2 (en) | 2010-12-30 | 2016-05-17 | Samsung Sdi Co., Ltd. | Rechargeable battery |
KR101285940B1 (ko) * | 2011-01-26 | 2013-07-12 | 로베르트 보쉬 게엠베하 | 이차전지 |
KR20130053026A (ko) * | 2011-11-14 | 2013-05-23 | 삼성에스디아이 주식회사 | 이차전지 |
US20130136964A1 (en) * | 2011-11-30 | 2013-05-30 | Johnson Controls Technology Company | Electrochemical cell having a safety device |
US9490079B2 (en) | 2014-03-28 | 2016-11-08 | Cooper Technologies Company | Electrochemical energy storage device with flexible metal contact current collector and methods of manufacture |
KR102039909B1 (ko) * | 2016-09-01 | 2019-11-04 | 주식회사 엘지화학 | 관통형의 기공 또는 구멍들이 형성된 집전체를 사용하여 전극을 제조하는 방법 |
CN109920960A (zh) * | 2019-02-28 | 2019-06-21 | 珠海格力精密模具有限公司 | 一种导电排及动力电池 |
WO2021149555A1 (ja) * | 2020-01-23 | 2021-07-29 | 株式会社村田製作所 | 二次電池、電子機器及び電動工具 |
DE102021209474A1 (de) | 2021-08-30 | 2023-03-02 | Volkswagen Aktiengesellschaft | Batteriezelle für ein Hochvoltbatteriesystem |
CN115051123B (zh) * | 2022-08-11 | 2022-12-02 | 楚能新能源股份有限公司 | 一种全极耳电芯结构 |
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WO2009128335A1 (ja) * | 2008-04-14 | 2009-10-22 | トヨタ自動車株式会社 | 電池およびその製造方法 |
CN101999185A (zh) * | 2008-04-14 | 2011-03-30 | 丰田自动车株式会社 | 电池及其制造方法 |
KR101124844B1 (ko) | 2008-04-14 | 2012-03-26 | 도요타지도샤가부시키가이샤 | 전지 및 그 제조 방법 |
US8580428B2 (en) | 2008-04-14 | 2013-11-12 | Toyota Jidosha Kabushiki Kaisha | Battery and method for manufacturing the same |
US20110086258A1 (en) * | 2008-08-25 | 2011-04-14 | Hironori Yaginuma | Method for manufacturing secondary battery and secondary battery |
CN110048065A (zh) * | 2018-01-17 | 2019-07-23 | 三洋电机株式会社 | 二次电池及其制造方法 |
JP7128666B2 (ja) | 2018-06-11 | 2022-08-31 | Fdk株式会社 | 二次電池 |
Also Published As
Publication number | Publication date |
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KR20090045388A (ko) | 2009-05-07 |
KR101057954B1 (ko) | 2011-08-18 |
EP2071649A1 (en) | 2009-06-17 |
US20090239139A1 (en) | 2009-09-24 |
US7976979B2 (en) | 2011-07-12 |
US20100304199A1 (en) | 2010-12-02 |
CN101517785B (zh) | 2011-09-21 |
CN101517785A (zh) | 2009-08-26 |
US8142922B2 (en) | 2012-03-27 |
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