WO2011125151A1 - 積層電極体型電池とその製造方法及び車両及び機器 - Google Patents
積層電極体型電池とその製造方法及び車両及び機器 Download PDFInfo
- Publication number
- WO2011125151A1 WO2011125151A1 PCT/JP2010/056061 JP2010056061W WO2011125151A1 WO 2011125151 A1 WO2011125151 A1 WO 2011125151A1 JP 2010056061 W JP2010056061 W JP 2010056061W WO 2011125151 A1 WO2011125151 A1 WO 2011125151A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- positive electrode
- negative electrode
- core material
- laminated
- electrode
- Prior art date
Links
Images
Classifications
-
- 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
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
-
- 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
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
-
- 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
- H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
-
- 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
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
Definitions
- the present invention relates to a laminated electrode body type battery, a manufacturing method thereof, a vehicle and a device. More specifically, the present invention relates to a laminated electrode body type battery having high mechanical strength at a connection portion between a positive electrode current collector plate and a positive electrode core material and a connection portion between a negative electrode current collector plate and a negative electrode core material, a manufacturing method thereof, a vehicle, and an apparatus. It is.
- Secondary batteries are used in a wide variety of fields, including electronic devices such as mobile phones and personal computers, vehicles such as hybrid vehicles and electric vehicles.
- a secondary battery includes a positive electrode plate, a negative electrode plate, and an electrolyte. Further, in order to insulate the positive electrode plate and the negative electrode plate, it is common to provide a separator between them.
- These battery shapes include cylindrical and square shapes.
- an electrode body used for these batteries there are a wound electrode body in which a positive electrode plate and a negative electrode plate are wound in a spiral shape and a flat electrode body in which a positive electrode plate and a negative electrode plate are stacked in layers.
- the positive electrode core material is protruded in one direction, and the protruding portion is joined to the positive electrode current collector plate.
- the negative electrode core member is protruded in the other direction, and the protruding portion is joined to the negative electrode current collector plate.
- ⁇ ⁇ Welding is used for this joining.
- mechanical connection and electrical connection are performed. Bonded strength and mechanical strength are required for the bonded portion thus bonded. This is because if a part of the joint is peeled off or the joint or its periphery is damaged, the part cannot be fixed and the electrical connection itself is lost. If the electrical connection is lost, current cannot be collected from that location.
- the junction is also required to have a low electrical resistance. This is because energy loss is large when electrical resistance is high.
- Patent Document 1 discloses a secondary battery including a wound electrode body in which a tip of a protruding portion of a positive electrode core material or a negative electrode core material is a slightly bent burr. The presence of this burr can prevent the tip of the protruding portion from being bent by the pressing force applied during welding. Therefore, it is assumed that no welding failure occurs.
- Patent Document 2 discloses a cylindrical storage battery in which a positive electrode current smoothing plate is welded to a tip portion of a positive electrode core material and a negative electrode current smoothing plate is welded to a tip portion of a negative electrode core material.
- the present invention has been made in order to solve the problems of the conventional techniques described above. That is, the problem is that a laminated electrode body type battery having high bonding strength and mechanical strength around the connection portion between the positive electrode current collector plate and the positive electrode core material and around the connection portion between the negative electrode current collector plate and the negative electrode core material, and It is to provide a manufacturing method and a vehicle and equipment.
- a laminated electrode body type battery includes a positive electrode plate in which a positive electrode mixture layer is formed on a part of at least one surface of a positive electrode core material, and at least a negative electrode core material.
- the remainder of the positive electrode core material and the remainder of the negative electrode core material are different from each other in the negative electrode plate in which the negative electrode mixture layer is formed on a part of one surface and the separator disposed between the positive electrode plate and the negative electrode plate.
- a stacked electrode type battery having a negative electrode current collector joined to a tip of a material, a positive electrode connecting material for connecting the tip of the positive electrode core and the positive electrode current collector, a tip of the negative electrode core and the negative electrode current collector
- a negative electrode connecting material that connects to the electrical conductor, and the positive electrode connecting material has a positive melting point. Lower than the melting point of the core material, the melting point of the negative electrode connecting member is lower than the melting point of the negative electrode core member.
- Such a laminated electrode body type battery has almost no possibility of peeling at the connection portion between the positive electrode core material and the positive electrode current collector. Further, the positive electrode core material in the vicinity of the connection portion has sufficient mechanical strength. The same applies to the negative electrode.
- the melting point of the positive electrode connecting material is preferably lower than the melting point of the positive electrode current collector, and the melting point of the negative electrode connecting material is preferably lower than the melting point of the negative electrode current collector. This is because the positive electrode current collector near the positive electrode connection material has sufficient mechanical strength. The same applies to the negative electrode.
- the material of the positive electrode core material is aluminum
- the material of the negative electrode core material is copper
- the material of the positive electrode connection material is Al—Si brazing material, Al—Si—.
- the negative electrode connecting material is any of Ni brazing material, Ag brazing material, and Cu brazing material.
- the brazing material is good. This is because the positive electrode current collector and the positive electrode core material are bonded with sufficient bonding strength by the brazing material wetted and spread by brazing.
- the material of the positive electrode core material and the positive electrode current collector is aluminum
- the material of the negative electrode core material and the negative electrode current collector is copper
- the material of the positive electrode connection material is Al.
- the negative electrode connecting material is Ni-based brazing material, Ag
- a brazing material such as a brazing material or a Cu-based brazing material may be used. This is because the positive electrode current collector and the positive electrode core material are bonded with sufficient bonding strength by the brazing material wetted and spread by brazing.
- a nonaqueous electrolyte may be provided between the positive electrode plate and the negative electrode plate.
- the difference between the thickness of the tip of the positive electrode core material and the thickness of the positive electrode core material in the range where the positive electrode mixture layer is formed is in the range where the positive electrode mixture layer is formed. It is good to exist in the range of 12% of the thickness of a positive electrode core material. This is because the positive electrode core material is not easily broken at the tip of the positive electrode core material.
- the difference between the thickness of the tip of the negative electrode core material and the thickness of the negative electrode core material in the range where the negative electrode mixture layer is formed is in the range where the negative electrode mixture layer is formed. It is good to exist in the range of 3% of the thickness of a negative electrode core material. This is because the negative electrode core material is unlikely to break at the tip of the negative electrode core material.
- the laminated electrode type battery according to another aspect of the present invention includes a positive electrode plate in which a positive electrode mixture layer is formed on a part of at least one side of the positive electrode core material, and a part of at least one side of the negative electrode core material.
- the laminated electrode body laminated, the positive electrode current collector joined to the tip of the positive electrode core member protruding from the positive electrode plate of the laminated electrode body, and the tip of the negative electrode core member protruding from the negative electrode plate of the laminated electrode body The difference between the thickness of the tip portion of the positive electrode core material and the thickness of the positive electrode core material in the range where the positive electrode mixture layer is formed is It exists in the range of 12% of the thickness of the positive electrode core material in the formed range. In such a laminated electrode body type battery, the positive electrode core material is not easily broken at the tip of the positive electrode core material.
- a laminated electrode body type battery includes a positive electrode plate in which a positive electrode mixture layer is formed on a part of at least one surface of a positive electrode core material, and at least one surface of at least one surface of a negative electrode core material. And the separator disposed between the positive electrode plate and the negative electrode plate so that the remaining portion of the positive electrode core material and the remaining portion of the negative electrode core material protrude in different directions.
- the difference between the thickness of the tip of the negative electrode core material and the thickness of the negative electrode core material in the range where the negative electrode mixture layer is formed is Is in the range of 3% of the thickness of the negative electrode core material in the range in which is formed.
- the negative electrode core material is not easily broken at the tip of the negative electrode core material.
- Still another embodiment of the present invention is a vehicle equipped with the above-described laminated electrode body type battery.
- Still another aspect of the present invention is a device on which the multilayer electrode body type battery described above is mounted.
- a method for manufacturing a laminated electrode body type battery comprising: a positive electrode plate having a positive electrode mixture layer formed on a part of at least one surface of a positive electrode core material; A negative electrode plate having a negative electrode mixture layer formed on a part of the surface, and a separator disposed between the positive electrode plate and the negative electrode plate, the remaining part of the positive electrode core material and the remaining part of the negative electrode core material are in different directions.
- Laminated electrode bodies are laminated so as to project, and the tip of the positive electrode core material protruding from the positive electrode plate of the laminated electrode body is joined to the positive electrode current collector, and the tip of the negative electrode core material protruding from the negative electrode plate of the laminated electrode body
- a positive electrode brazing material having a melting point lower than that of the positive electrode core material is used to join the tip of the positive electrode core material and the positive electrode current collector.
- a negative melting point lower than that of the negative electrode core material is used to join the tip of the core material to the negative electrode current collector.
- a brazing material having a melting point lower than the melting point of the positive electrode current collector is used as the brazing material for the positive electrode, and the melting point of the negative electrode current collector is lower as the brazing material for the negative electrode.
- a brazing material having a melting point may be used. This is because the positive electrode current collector and the negative electrode current collector have high mechanical strength.
- a laminated electrode body type battery having high bonding strength and mechanical strength around the connection portion between the positive electrode current collector plate and the positive electrode core material and around the connection portion between the negative electrode current collector plate and the negative electrode core material, and a method for producing the same And vehicles and equipment are provided.
- the battery according to the present embodiment is a cylindrical lithium ion secondary battery.
- the electrode body is a laminated electrode body type battery including a laminated electrode body in which positive and negative electrode plates are alternately stacked and wound.
- FIG. 1 shows a cross-sectional view of the battery 100 of this embodiment.
- the battery 100 includes an electrode winding body 200, a positive current collector 110, and a negative current collector 120, which are sealed with a battery container 101 and a lid 102. is there.
- the positive electrode current collector plate 110 is joined to the electrode winding body 200 by a connecting material 111.
- the negative electrode current collector plate 120 is joined to the electrode winding body 200 with a connecting material 121.
- the connection material 111 and the connection material 121 will be described in detail later.
- an electrolytic solution is injected into the battery container 101.
- the electrode winding body 200 repeats charging / discharging in the electrolyte and directly contributes to power generation.
- the positive electrode current collector 110 is a positive electrode current collector for taking out electric power from the electrode winding body 200 or discharging it to the electrode winding body 200.
- the material is aluminum.
- the negative electrode current collector 120 is a negative electrode current collector for taking out electric power from the electrode winding body 200 or discharging it to the electrode winding body 200. Its material is copper.
- the electrolyte injected into the battery container 101 is obtained by dissolving an electrolyte in an organic solvent.
- organic solvent include ester solvents such as propylene carbonate (PC), ethylene carbonate (EC), dimethyl carbonate (DMC), and ethyl methyl carbonate (EMC), ⁇ -butylactone ( ⁇ -BL), diester
- An organic solvent containing an ether solvent such as ethoxyethane (DEE) can be used.
- the electrolyte salt lithium salts such as lithium perchlorate (LiClO 4 ), lithium borofluoride (LiBF 4 ), and lithium hexafluorophosphate (LiPF 6 ) can be used.
- FIG. 2 is a perspective view illustrating the electrode winding body 200, the positive current collector 110, and the negative current collector 120 extracted from the battery 100 of the present embodiment.
- slash hatching is applied to a region 140 where the positive electrode current collector 110 and the electrode winding body 200 are joined.
- the connecting material 111 shown in FIG. 1 exists on the inner surface of the positive electrode current collector plate 110, that is, the surface on the electrode winding body 200 side and corresponding to the region 140.
- the negative electrode current collector plate 120 also has a connecting material 121 at a position substantially facing the connecting material 111 of the positive electrode current collector plate 110.
- FIG. 3 is a perspective view of the electrode winding body 200.
- the electrode winding body 200 has an electrode main body M at the center, a positive electrode non-coated part P2 and a negative electrode non-coated part N2 at both ends.
- the electrode main body M is a portion where the positive electrode plate and the negative electrode plate are wound with the separator disposed therebetween.
- the positive electrode non-coated part P2 and the negative electrode non-coated part N2 will be described later.
- the positive electrode plate is obtained by applying a mixture containing a positive electrode active material capable of occluding and releasing lithium ions to an aluminum foil which is a belt-like positive electrode core material.
- a positive electrode active material lithium composite oxides such as lithium nickelate (LiNiO 2 ), lithium manganate (LiMnO 2 ), and lithium cobaltate (LiCoO 2 ) are used.
- the negative electrode plate is obtained by applying a mixture containing a negative electrode active material capable of occluding and releasing lithium ions to a copper foil which is a strip-shaped negative electrode core material.
- carbon-based materials such as amorphous carbon, non-graphitizable carbon, graphitizable carbon, and graphite are used.
- FIG. 4 is a development view showing the winding structure of the electrode winding body 200.
- the electrode winding body 200 is wound in a state where the positive electrode plate P, the separator S, the negative electrode plate N, and the separator T are stacked in this order from the inside.
- the separator S and the separator T are made of the same material. For the understanding of the above winding order, only the codes are distinguished as S and T.
- the positive electrode plate P has a positive electrode coating part P1 and a positive electrode non-coating part P2.
- the positive electrode coating part P1 is a part where a positive electrode active material or the like is applied to part of both surfaces of the positive electrode core material.
- the positive electrode non-coated portion P2 is a remaining portion where the positive electrode active material or the like is not applied to the positive electrode core material. Therefore, the thickness of the positive electrode coating part P1 is thicker than the thickness of the positive electrode non-coating part P2.
- the negative electrode plate N has a negative electrode coating portion N1 and a negative electrode non-coating portion N2.
- the negative electrode coating part N1 is a part where a negative electrode active material or the like is applied to part of both surfaces of the negative electrode core material.
- the negative electrode non-coated portion N2 is a remaining portion where the negative electrode active material or the like is not applied to the negative electrode core material. Therefore, the thickness of the negative electrode coating part N1 is thicker than the thickness of the negative electrode non-coating part N2.
- the coating width in the width direction of the positive electrode coating portion P1 is slightly narrower than the coating width in the width direction of the negative electrode coating portion N1. This is because when the concentration of lithium ions in the electrolytic solution is high, the negative electrode active material occludes lithium ions to suppress an increase in the concentration. If the concentration of lithium ions in the electrolyte increases too much, lithium may precipitate in a dendritic form. If it does so, battery performance will fall.
- FIG. 5 is a perspective sectional view of the positive electrode plate P (or the negative electrode plate N).
- each symbol outside the parentheses indicates each part in the case of the positive electrode, and each symbol in the parenthesis indicates each part in the case of the negative electrode.
- the direction indicated by the arrow A in FIG. 5 is the same as the direction indicated by the arrow A in FIG. That is, it is the width direction of the positive electrode plate P.
- the direction indicated by arrow B in FIG. 5 is the same as the direction indicated by arrow B in FIG. That is, it is the longitudinal direction of the positive electrode plate P.
- the positive electrode plate P is obtained by forming a positive electrode mixture layer PA on both surfaces of a strip-like positive electrode core material PB.
- the positive electrode non-coated portion P2 of the positive electrode plate P protrudes in the width direction.
- the positive electrode non-coated portion P2 is formed in a strip shape.
- the positive electrode non-coated portion P2 is a region where the positive electrode active material is not applied. Therefore, in the positive electrode non-coating portion P2, the positive electrode core material PB is still exposed.
- the positive electrode mixture layer PA is formed with a uniform thickness on both surfaces of the positive electrode core material PB.
- the negative electrode plate N is one in which a negative electrode mixture layer NA is formed on both surfaces of a strip-shaped negative electrode core material NB, as shown in parentheses in FIG. Similarly to the positive electrode, there are a negative electrode coating portion N1 and a negative electrode non-coating portion N2. However, as shown in FIG. 4, at the time of winding, the positive electrode non-coated portion P2 and the negative electrode non-coated portion N2 are wound in a state of protruding to the opposite side.
- FIG. 6 is a cross-sectional view depicting the periphery of the electrode winding body 200 taken out from the battery 100 shown in FIG.
- the electrode winding body 200 is an electrode body wound in the order of a positive electrode plate P, a separator S, a negative electrode plate N, and a separator T.
- the positive electrode current collector plate 110 and the negative electrode current collector plate 120 are disposed to face each other with the electrode winding body 200 interposed therebetween.
- the positive electrode coating portion P1 and the negative electrode coating portion N1 are uniformly represented by slash hatching.
- the positive electrode coating portion P1 is obtained by coating a composite material containing a positive electrode active material on an aluminum positive electrode core PB.
- the negative electrode coating part N1 is obtained by coating a copper negative electrode core material NB with a mixture containing a negative electrode active material. The meaning of this hatching is the same as in FIGS.
- the front end portion PX of the positive electrode core material PB of the positive electrode non-coating portion P2 is a front end portion of the positive electrode core material PB protruding from the positive electrode coating portion P1 toward the positive electrode current collector plate 110.
- the tip end portion PX of the positive electrode core material PB is joined to the positive electrode current collector plate 110 via the connecting material 111.
- the connecting material 111 is a positive electrode connecting material for connecting the front end portion PX of the positive electrode core material PB to the positive electrode current collector plate 110. This joining is performed by brazing. Therefore, the material of the connecting material 111 is mainly a brazing material. The type of brazing material will be described in detail later.
- the melting point of the connecting material 111 is lower than the melting point of the positive electrode core material PB. Therefore, as will be described later, there is no possibility that the tip portion PX of the positive electrode non-coated portion P2 is melted by heating when joining the tip portion PX of the positive electrode non-coated portion P2 and the positive electrode current collector plate 110. Further, the melting point of the connecting material 111 is lower than the melting point of the positive electrode current collector plate 110. Accordingly, similarly, there is no possibility that a part of the positive electrode current collector plate 110 is melted by heating at the time of brazing.
- the front end portion NX of the negative electrode core material NB of the negative electrode non-coating portion N2 is a front end portion of the negative electrode core material NB protruding from the negative electrode coating portion N1 toward the negative electrode current collector plate 120.
- the direction toward the front end NX is opposite to the direction toward the front end PX of the positive electrode core material PB.
- the front end portion NX of the negative electrode core member NB is joined to the negative electrode current collector plate 120 via the connecting member 121.
- the connecting material 121 is a negative electrode connecting material for connecting the tip portion NX of the negative electrode core material NB to the negative electrode current collector plate 120. This joining is performed by brazing. Therefore, the material of the connecting material 121 is mainly a brazing material.
- the type of brazing material used for the negative electrode is different from the type of brazing material used for the positive electrode. The type of brazing material will be described in detail later.
- the melting point of the connecting material 121 is lower than the melting point of the negative electrode core material NB. Therefore, as will be described later, there is no possibility that the tip portion NX of the negative electrode non-coated portion N2 is melted by heating when joining the tip portion NX of the negative electrode non-coated portion N2 and the negative electrode current collector plate 120. Further, the melting point of the connecting material 121 is lower than the melting point of the negative electrode current collector plate 120. Accordingly, similarly, there is no possibility that a part of the negative electrode current collector plate 120 is melted by heating during brazing.
- the melting point of the positive electrode side connecting material 111 may be higher or lower than the melting points of the negative electrode current collector 120 and the negative electrode non-coated portion N2. Further, the melting point of the connecting material 111 on the positive electrode side may be higher or lower than the melting point of the connecting material 121. In other words, there is no particular relevance. This is because the width of the electrode winding body 200 is sufficient, and there is almost no possibility that the negative electrode side member is heated when the positive electrode side member is heated. Similarly, the melting point of the negative electrode side connecting member 121 may be higher or lower than the melting points of the positive electrode current collector 110 and the positive electrode non-coated portion P2. Further, the melting point of the connecting material 121 on the negative electrode side may be higher or lower than the melting point of the connecting material 111. This is because there is almost no possibility that the positive electrode side member is heated during heating of the negative electrode side member.
- the positive electrode core material PB and the negative electrode core material NB do not melt at the time of joining. Therefore, the thickness of the tip portion PX of the positive electrode core material PB is almost the same as the thickness of the positive electrode core material PB in the positive electrode coating portion P1. The same applies to the negative electrode.
- the connecting material 111 is provided between the positive electrode core material PB of the wound electrode body 200 and the positive electrode current collector plate 110, and the negative electrode core material NB and the negative electrode current collector plate 120.
- a connecting material 121 is provided between the two.
- the melting point of the connecting material 111 is lower than the melting point of the positive electrode core material PB.
- the melting point of the connecting material 121 is lower than the melting point of the negative electrode core material NB.
- the thickness of the positive electrode core material PB in the vicinity of the connecting material 111 is almost the same as the thickness of the positive electrode core material PB in the positive electrode coating portion P1. Therefore, the mechanical strength of the connecting material 111 and the positive electrode core material PB in the vicinity thereof is high.
- the thickness of the negative electrode core material NB in the vicinity of the connecting material 121 is almost the same as the thickness of the negative electrode core material NB in the negative electrode coating portion N1.
- Battery Manufacturing Method a method for manufacturing the battery 100 will be described.
- the joining of the connecting material 111 and the connecting material 121, which is a feature of the present invention, will be described in detail, and the other processes will be described in a simplified manner.
- a mixture containing a positive electrode active material is applied to both sides of the positive electrode core material PB and dried.
- the dried positive electrode plate is pressed and cut to form a positive electrode plate P.
- the negative electrode plate N is prepared for the negative electrode.
- the positive electrode plate P, the separator S, the negative electrode plate N, and the separator T are wound in this order from the inside. In this way, the electrode winding body 200 is manufactured.
- the brazing material shown in Table 1 is used for brazing.
- An example of nickel wax is BNi-6 (JIS).
- An example of silver wax is BAg-8 (JIS).
- An example of phosphor copper wax is BCuP-2 (JIS).
- the melting point of the brazing material used here is lower than the melting point of 1357 ° C. of copper used for the negative electrode core material NB.
- the solidus temperature of BNi-6 (JIS) is 875 ° C.
- the solidus temperature of BAg-8 (JIS) is 780 ° C.
- the solidus temperature of BCuP-2 (JIS) is 710 ° C. Therefore, the brazing hardly causes the tip portion NX of the negative electrode core NB and a part of the negative electrode current collector plate 120 shown in FIG. 6 to melt.
- the positive electrode current collector plate 110 is joined to the electrode winding body 200.
- brazing is performed using a brazing material of A4047 (JIS).
- A4047 (JIS) is an Al-Si system.
- brazing can be performed using the brazing material shown in Table 2.
- the melting point of the brazing material used here is lower than the melting point 660 ° C. of aluminum used for the positive electrode core material PB.
- the melting temperature is about 577 ° C. Therefore, the brazing hardly causes the tip portion PX of the positive electrode core material PB and a part of the positive electrode current collector plate 110 shown in FIG. 6 to melt.
- the brazing material needs to be made of a material that is not corroded by the electrolytic solution in a state where an electric potential is applied. This is because if there is corrosion, peeling may occur at the connection material 111 and the connection material 121. Moreover, it is necessary to be a conductive material such as metal. This is because it is indispensable for the electrical connection between the electrode plates and the current collector plates by the connecting material 111 and the connecting material 121. Furthermore, a thing with low electrical resistance is preferable. This is because the loss of electrical energy is small. Moreover, the thing excellent in the wettability and joining property with the positive electrode current collecting plate 110 or the negative electrode current collecting plate 120 is preferable. This is because the connecting material 111 and the connecting material 121 after joining have high mechanical strength.
- the electrode winding body 200 joined with the positive electrode current collector plate 110 and the negative electrode current collector plate 120 is inserted into the battery container 101.
- an electrolytic solution is injected into the battery container 101.
- the battery 100 is manufactured through conditioning and various inspection processes.
- the tip portion PX of the positive electrode core material PB or the tip portion NX of the negative electrode core material NB does not melt. Further, a part of the positive electrode current collector plate 110 or the negative electrode current collector plate 120 is not melted. Therefore, the battery 100 manufactured according to the present embodiment has high strength at the front end portion PX of the positive electrode core material PB and the front end portion NX of the negative electrode core material NB.
- FIG. 7 is a schematic view of the positive electrode current collector 110 and the positive electrode core material PB of the positive electrode non-coated portion P2 extracted and drawn in the present invention.
- FIG. 8 is a schematic diagram illustrating a conventional positive electrode current collector plate 1110 and a positive electrode plate QB of the positive electrode non-coated portion Q2.
- the connecting material 111 according to the present invention is larger than the conventional connecting portion 1111.
- a brazing material is disposed in advance between the positive electrode current collector plate 110 and the tip portion PX of the positive electrode core material PB before joining.
- the wettability of the brazing material to the positive electrode current collector plate 110 is good, it spreads well when melted.
- the connection portion 1111 if the heating is too strong, the melting region of the positive electrode non-coated portion Q ⁇ b> 2 and the positive electrode current collector plate 1110 is too wide, so that it cannot be sufficiently bonded. Therefore, the mechanical strength of the connecting material 111 is higher than the mechanical strength of the connecting portion 1111.
- the thickness of the tip portion PX of the present embodiment is thicker than the thickness of the conventional tip portion QX. Therefore, the mechanical strength of the positive end portion PX on the positive electrode side of the battery 100 of this embodiment is higher than the mechanical strength of the front end portion QX on the positive electrode side of the conventional battery. In the conventional battery, stress tends to concentrate at the tip QX. Therefore, it is easy to break at the tip QX.
- the electrical resistance of the positive end PX on the positive electrode side of the battery 100 of the present embodiment is lower than the electrical resistance of the positive end QX on the positive side of the conventional battery. This is because the thickness of the tip portion PX, which is an electric conduction path, is thicker than the thickness of the tip portion QX. Furthermore, the battery 100 of this embodiment can withstand a larger current than the conventional battery. These situations are the same on the negative electrode side.
- the positive electrode core material is aluminum foil.
- the thickness of the aluminum foil before joining is 15 ⁇ m.
- the foil thickness tolerance is ⁇ 0.9 ⁇ m.
- the negative electrode core material is a copper foil.
- the thickness of the copper foil before joining is 10.3 ⁇ m.
- the foil thickness tolerance is ⁇ 0.2 ⁇ m.
- connection material 111 related to the battery of this embodiment and the connection part 1111 related to the conventional battery was measured.
- the measurement method is shown in FIG. First, the side surface of the electrode winding body 200 is fixed by applying a force in the directions of arrows E and F in FIG. Next, with the electrode winding body 200 fixed, the positive electrode current collector plate 110 is pulled in the direction toward the outside, that is, in the direction of arrow G in FIG. Then, the force when the electrode winding body 200 and the positive electrode current collector 110 are separated is measured. The same applies to the negative electrode.
- Example 1 is a result of using BNi-6 (JIS) as a brazing material for a negative electrode.
- the thickness of the tip portion NX of the negative electrode core material NB after bonding was 10 ⁇ m. Therefore, it is shown in Table 3 as 10 ⁇ m within the range of the foil thickness tolerance. Further, the tensile strength was 1N / 1, which was a sufficient strength.
- Example 2 is a result of using BAg-8 (JIS) as a brazing material for a negative electrode.
- the thickness of the tip portion NX of the negative electrode core material NB after bonding was 10 ⁇ m. Therefore, it is shown in Table 3 as 10 ⁇ m within the range of the foil thickness tolerance. Further, the tensile strength was 1N / 1, which was a sufficient strength.
- Example 3 is a result of using BCuP-2 (JIS) as a brazing material for a negative electrode.
- the thickness of the tip portion NX of the negative electrode core material NB after bonding was 10 ⁇ m. Therefore, it is shown in Table 3 as 10 ⁇ m within the range of the foil thickness tolerance. Further, the tensile strength was 1N / 1, which was a sufficient strength.
- Example 4 is a result of using an Al—Si brazing (equivalent to JIS A4047) as the brazing material for the positive electrode. Its solidus temperature is 577 ° C and its liquidus temperature is 592 ° C. The thickness of the tip portion PX of the positive electrode core material PB after bonding was 15 ⁇ m. Therefore, it is shown in Table 3 as 15 ⁇ m within the range of the foil thickness tolerance. Further, the tensile strength was 0.75 N / 1, which was a sufficient strength.
- Al—Si brazing equivalent to JIS A4047
- Example 5 is a result of using an Al—Si—Mg-based brazing (corresponding to JIS A4004) as a brazing material for a positive electrode. Its solidus temperature is 559 ° C. and its liquidus temperature is 591 ° C. The thickness of the tip portion PX of the positive electrode core material PB after bonding was 15 ⁇ m. Therefore, it is shown in Table 3 as 15 ⁇ m within the range of the foil thickness tolerance. Further, the tensile strength was 0.75 N / 1, which was a sufficient strength.
- Al—Si—Mg-based brazing corresponding to JIS A4004
- Example 6 is a result of using an Al—Zn-based brazing (soft brazing) as a brazing material for a positive electrode. Its solidus temperature is 360 ° C and its liquidus temperature is 362 ° C. The thickness of the tip portion PX of the positive electrode core material PB after bonding was 15 ⁇ m. Therefore, it is shown in Table 3 as 15 ⁇ m within the range of the foil thickness tolerance. Further, the tensile strength was 0.75 N / 1, which was a sufficient strength.
- soft brazing soft brazing
- Example 7 is a result of using a Zn—Sn-based brazing (soft brazing) as a brazing material for a positive electrode. Its solidus temperature is 195 ° C. and its liquidus temperature is 235 ° C. The thickness of the tip portion PX of the positive electrode core material PB after bonding was 15 ⁇ m. Therefore, it is shown in Table 3 as 15 ⁇ m within the range of the foil thickness tolerance. Further, the tensile strength was 0.75 N / 1, which was a sufficient strength.
- Zn—Sn-based brazing soft brazing
- Comparative Example 1 is a result of not performing brazing using a brazing material for a negative electrode, but instead joining a negative electrode current collector plate and a negative electrode core material by welding.
- the thickness of the tip (corresponding to NX) of the negative electrode core was 4 to 6 ⁇ m, which was about half the thickness before bonding.
- the tensile strength was 0.35 N / 1 place, which was about half of the reference value (0.75 N / 1 place).
- Comparative Example 2 The comparative example 2 is a result of joining the positive electrode current collector plate and the positive electrode core material by welding instead of performing brazing using the positive electrode brazing material.
- the thickness of the tip (corresponding to PX) of the positive electrode core material was 8 to 10 ⁇ m, which was about half the thickness before bonding.
- the tensile strength was 0.50 N / 1 place, which was less than the standard value (0.75 N / 1 place).
- the batteries according to this embodiment are shown in Examples 1 to 7 in Table 3.
- the conventional batteries are shown in Comparative Examples 1 and 2 in Table 3.
- the tensile strength was defined as the tensile strength per joint between the electrode current collector plate and the electrode plate. As the tensile strength required for the joint location, 0.75 N / 1 location or more was set. This value is common to the positive electrode and the negative electrode.
- the Al—Si brazing is Al—Si
- the Al—Si—Mg brazing is Al—Si—Mg
- the Al—Zn brazing is Al—Zn
- the Zn—Sn brazing is used. Indicated as Zn-Sn.
- the positive electrode core material (aluminum foil) and the negative electrode core material (copper foil) are bonded to the positive electrode or negative electrode current collector plate.
- the thickness hardly changed.
- the thickness of the positive electrode core material after joining was in the range of the foil thickness tolerance ( ⁇ 9 ⁇ m). That is, the difference between the thickness of the positive electrode core material PB after bonding and the thickness of the positive electrode core material PB in the positive electrode coating portion P1 was within a range of 12% of the thickness of the positive electrode core material PB in the positive electrode coating portion P1. .
- the thickness of the negative electrode core material after joining was in the range of the foil thickness tolerance ( ⁇ 2 ⁇ m).
- the difference between the thickness of the negative electrode core material NB after bonding and the thickness of the negative electrode core material NB in the negative electrode coating portion N1 was within a range of 3% of the thickness of the negative electrode core material NB in the negative electrode coating portion N1. .
- FIG. 10 shows a modification of this embodiment.
- the electrode winding body 200, the positive electrode current collector plate 110, and the negative electrode current collector plate 120 are the same as those in this embodiment.
- the material of the brazing material used for joining is the same as that of this embodiment.
- the shape of the brazing material used for joining is different.
- the connecting material 311 between the positive electrode non-coated portion P2 and the positive electrode current collector plate 110 is connected by the adjacent connecting material 311 and the bridge portion 312.
- the connecting material 321 between the negative electrode non-coated portion N2 and the negative electrode current collector plate 120 is also connected to the adjacent connecting material 321 by the bridge portion 322. Even if it is such a shape, there exists an effect of this invention.
- the positive electrode core material PB and the positive electrode current collector plate 110 are made of aluminum.
- materials other than aluminum can be used as the material of the positive electrode core material PB or the positive electrode current collector plate 110 or both of them.
- the effect of the present invention can be achieved as long as the melting point of the connecting material 111 is lower than the melting point of the positive electrode core material PB. This is because there is no possibility that the positive electrode core material PB melts during brazing.
- brazing is performed by mainly heating a brazing material as in soldering, bonding is performed even if the melting point of the connecting material 111 is lower than the melting point of the positive electrode core material PB and higher than the melting point of the positive electrode current collector plate. be able to.
- the positive electrode core material PB is not melted during brazing.
- the brazing material is melted at the time of brazing, and a part of the positive electrode current collector plate in contact with the molten brazing material is temporarily melted to some extent, but not all is melted. Even in such a case, the connection material 111 and the positive electrode current collector plate are sufficiently joined. There is no possibility that the positive electrode core material PB becomes thin. However, it is preferable that the difference between the melting point of the connecting material 111 and the melting point of the positive electrode current collector plate is small.
- the melting point of the connecting portion 111 is lower than both the melting point of the positive electrode core material PB and the melting point of the positive electrode current collector plate 110. This is because the positive electrode core material PB is not thinned and the positive electrode current collector plate 110 is not thinned.
- the above items are the same for the negative electrode.
- the battery 100 according to the present embodiment can be used by being mounted on a vehicle 400, for example, as shown in FIG.
- the vehicle 400 is a hybrid vehicle that is driven by using an engine 440 and a motor 420 in combination.
- the vehicle 400 includes a vehicle body 490, an engine 440, a motor 420 attached thereto, a cable 450, an inverter 430, and an assembled battery 401 having a plurality of batteries 100 therein.
- the vehicle may be a vehicle that uses battery-generated electric energy for all or a part of its power source.
- an electric vehicle, a hybrid vehicle, a plug-in hybrid vehicle, a hybrid railway vehicle, a forklift, an electric vehicle Wheelchairs, electric assist bicycles, electric scooters, etc. are listed.
- the battery 100 can also be used for battery-equipped equipment as shown in FIG.
- FIG. This figure shows a hammer drill 500 equipped with the battery 100 of this embodiment.
- the hammer drill 500 is a battery-equipped device having a battery 100 and a main body 520.
- the battery 100 is detachably accommodated in the bottom 521 of the main body 520 of the hammer drill 500.
- the battery-equipped device may be any device equipped with a battery and using it as at least one energy source.
- a personal computer a mobile phone, a battery-powered electric tool, an uninterruptible power supply, etc.
- Various types of home appliances, office equipment, and industrial equipment driven by In addition to the battery 100, it includes devices that can be used as single cells that are not in the assembled battery state.
- the battery 100 includes the connecting material 111, the negative electrode core NB, and the negative electrode between the positive electrode core material PB and the positive electrode current collector plate 110 of the wound electrode body 200.
- a connecting member 121 is provided between the current collector plate 120 and the current collector plate 120.
- the melting point of the connecting material 111 is lower than the melting point of the positive electrode core material PB.
- the melting point of the connecting material 121 is lower than the melting point of the negative electrode core material NB.
- the thickness of the positive electrode core material PB in the vicinity of the connecting material 111 is almost the same as the thickness of the positive electrode core material PB in the positive electrode coating portion P1. Therefore, the mechanical strength of the connecting material 111 and the positive electrode core material PB in the vicinity thereof is high.
- the thickness of the negative electrode core material NB in the vicinity of the connecting material 121 is almost the same as the thickness of the negative electrode core material NB in the negative electrode coating portion N1. Therefore, the mechanical strength of the connecting material 121 and the negative electrode core material NB in the vicinity thereof is high.
- the tip portion PX of the positive electrode core material PB or the tip portion NX of the negative electrode core material NB does not melt during the manufacturing process. Further, a part of the positive electrode current collector plate 110 or the negative electrode current collector plate 120 is not melted. Therefore, in the battery 100 manufactured according to the present embodiment, the strength of the positive electrode core material PB and the negative electrode core material NB is high.
- this embodiment is merely an example, and does not limit the present invention. Therefore, the present invention can naturally be improved and modified in various ways without departing from the gist thereof.
- it is not limited to a lithium ion secondary battery.
- Other nonaqueous electrolyte secondary batteries may be used.
- other batteries may be used.
- the shape of the battery is not limited to the cylindrical shape.
- the same effect can be obtained even with a square shape or other shapes. That is, it may be a pressed flat electrode body.
- the electrode body is not limited to a wound type. This is because even a layered electrode body has the same effect as long as it is a laminate of a positive electrode plate and a negative electrode plate.
- the direction in which the positive electrode core material and the negative electrode core material protrude is not necessarily the opposite direction. This is because current can be collected if the positive electrode core material and the negative electrode core material protrude in different directions.
- the type of brazing material is not limited to those exemplified in Tables 1 and 2. That is, any material having a melting point lower than that of the positive electrode core material can be applied.
- the positive electrode mixture layer may be formed only on one side.
- the positive electrode current collector is not limited to a plate shape. The same applies to the negative electrode.
- the brazing performed in the present invention may be performed using a furnace or may be heated like soldering.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
Description
101…電池容器
102…蓋
110…正極集電板
120…負極集電板
200…電極捲回体
111,121,311,321…接続材
P…正極板
PA…正極合材層
PB…正極芯材
P1…正極塗工部
P2…正極非塗工部
N…負極板
NA…負極合材層
NB…負極芯材
N1…負極塗工部
N2…負極非塗工部
M…電極本体部
S,T…セパレータ
本実施の形態に係るバッテリは,円筒型のリチウムイオン二次電池である。その電極体は,正極板と負極板とが交互に積み重ねられて捲回された積層電極体を備える積層電極体型電池である。図1に,本形態のバッテリ100の断面図を示す。バッテリ100は,図1に示すように,電池容器101および蓋102により密閉された内部に,電極捲回体200と,正極集電板110と,負極集電板120とが内蔵されたものである。正極集電板110は,接続材111で電極捲回体200に接合されている。負極集電板120は,接続材121で電極捲回体200に接合されている。これらの接続材111および接続材121については,後で詳しく述べる。また,電池容器101の内部には電解液が注入されている。
図2は,本形態のバッテリ100から電極捲回体200と,正極集電板110と,負極集電板120とを抜き出して描いた斜視図である。図2中では,正極集電板110と,電極捲回体200とが接合された領域140にスラッシュのハッチングを施してある。正極集電板110の内側の面,すなわち電極捲回体200の側の面であって領域140に対応する位置に,図1で示した接続材111が存在している。また,負極集電板120にも,正極集電板110の接続材111とほぼ対面する位置に接続材121が存在している。
図6は,図1に示したバッテリ100から電極捲回体200の周辺を取り出して描いた断面図である。図6に示すように,電極捲回体200は,正極板P,セパレータS,負極板N,セパレータTの順で捲回された電極体である。正極集電板110と負極集電板120とは,電極捲回体200を間に挟んで対向して配置されている。
ここで,バッテリ100の製造方法について説明する。本発明の特徴点である接続材111および接続材121での接合について詳細に説明し,それ以外の工程については簡略化して説明する。
A)電極板の比較
ここで,本実施の形態のバッテリ100と従来のバッテリとの比較について説明する。そのために,正極の接続材111周辺を例に挙げて説明する。図7は,本発明における正極集電板110と,正極非塗工部P2の正極芯材PBを抜き出して描いた模式図である。図8は,従来における正極集電板1110と,正極非塗工部Q2の正極板QBを抜き出して描いた模式図である。
本形態のバッテリに係る正極芯材または負極芯材の先端部の厚みと,従来のバッテリに係る正極芯材または負極芯材の先端部の厚みとを比較するために,これらの先端部の厚みを測定した。すなわち,図7に示した本形態の先端部PXの厚みと,図8に示した従来の先端部QXの厚みである。
実施例1は,負極用ロウ材として,BNi-6(JIS)を用いた結果である。接合後の負極芯材NBの先端部NXの厚みは10μmであった。したがって,箔厚公差の範囲内の10μmとして表3に示す。また,引張強度は1N/1箇所であり,十分な強度であった。
実施例2は,負極用ロウ材として,BAg-8(JIS)を用いた結果である。接合後の負極芯材NBの先端部NXの厚みは10μmであった。したがって,箔厚公差の範囲内の10μmとして表3に示す。また,引張強度は1N/1箇所であり,十分な強度であった。
実施例3は,負極用ロウ材として,BCuP-2(JIS)を用いた結果である。接合後の負極芯材NBの先端部NXの厚みは10μmであった。したがって,箔厚公差の範囲内の10μmとして表3に示す。また,引張強度は1N/1箇所であり,十分な強度であった。
実施例4は,正極用ロウ材として,Al-Si系ロウ(JIS A4047相当)を用いた結果である。その固相線温度は577℃であり,液相線温度は592℃である。接合後の正極芯材PBの先端部PXの厚みは15μmであった。したがって,箔厚公差の範囲内の15μmとして表3に示す。また,引張強度は0.75N/1箇所であり,十分な強度であった。
実施例5は,正極用ロウ材として,Al-Si-Mg系ロウ(JIS A4004相当)を用いた結果である。その固相線温度は559℃であり,液相線温度は591℃である。接合後の正極芯材PBの先端部PXの厚みは15μmであった。したがって,箔厚公差の範囲内の15μmとして表3に示す。また,引張強度は0.75N/1箇所であり,十分な強度であった。
実施例6は,正極用ロウ材として,Al-Zn系ロウ(軟ロウ)を用いた結果である。その固相線温度は360℃であり,液相線温度は362℃である。接合後の正極芯材PBの先端部PXの厚みは15μmであった。したがって,箔厚公差の範囲内の15μmとして表3に示す。また,引張強度は0.75N/1箇所であり,十分な強度であった。
実施例7は,正極用ロウ材として,Zn-Sn系ロウ(軟ロウ)を用いた結果である。その固相線温度は195℃であり,液相線温度は235℃である。接合後の正極芯材PBの先端部PXの厚みは15μmであった。したがって,箔厚公差の範囲内の15μmとして表3に示す。また,引張強度は0.75N/1箇所であり,十分な強度であった。
比較例1は,負極用ロウ材を用いたロウ付けを行わず,その代わりに負極集電板と負極芯材とを溶接により接合した結果である。負極芯材の先端部(NXに相当)の厚みは4~6μmであり,接合前の厚みの半分程度であった。引張強度は0.35N/1箇所であり,基準値(0.75N/1箇所)の半分程度であった。
比較例2は,正極用ロウ材を用いたロウ付けを行わず,その代わりに正極集電板と正極芯材とを溶接により接合した結果である。正極芯材の先端部(PXに相当)の厚みは8~10μmであり,接合前の厚みの半分程度であった。引張強度は0.50N/1箇所であり,基準値(0.75N/1箇所)に満たなかった。
ここで本形態の変形例について説明する。図10に本形態の変形例を示す。図10において,電極捲回体200,正極集電板110,負極集電板120は,本形態のものと同様である。接合に用いるロウ材の材質も本形態のものと同様である。ただし,接合に用いるロウ材の形状が異なっている。正極非塗工部P2と正極集電板110との接続材311が,隣接する接続材311と橋梁部312で繋がっている。また,負極非塗工部N2と負極集電板120との接続材321も,隣接する接続材321と橋梁部322で繋がっている。このような形状であっても本発明の効果を奏する。
本形態のバッテリ100は,例えば,図11に示すように,車両400に搭載して使用することができる。この車両400は,エンジン440,モータ420を併用して駆動するハイブリッド自動車である。この車両400は,車体490,エンジン440,これに取り付けられたモータ420,ケーブル450,インバータ430及び複数のバッテリ100を自身の内部に有する組電池401を有している。
以上詳細に説明したように,本実施の形態に係るバッテリ100は,捲回電極体200の正極芯材PBと正極集電板110との間に接続材111を,負極芯材NBと負極集電板120との間に接続材121を設けたものである。そして接続材111の融点は,正極芯材PBの融点よりも低い。接続材121の融点は,負極芯材NBの融点よりも低い。
Claims (13)
- 正極芯材の少なくとも片側の面の一部に正極合材層が形成された正極板と,負極芯材の少なくとも片側の面の一部に負極合材層が形成された負極板と,前記正極板と前記負極板との間に配置されるセパレータとが,前記正極芯材の残部と前記負極芯材の残部とがそれぞれ異なる方向に突出するように積層された積層電極体と,
前記積層電極体の前記正極板から突出した前記正極芯材の先端部と接合された正極集電体と,
前記積層電極体の前記負極板から突出した前記負極芯材の先端部と接合された負極集電体とを有する積層電極体型電池において,
前記正極芯材の先端部と前記正極集電体とを接続する正極接続材と,
前記負極芯材の先端部と前記負極集電体とを接続する負極接続材とを有し,
前記正極接続材の融点は,
前記正極芯材の融点よりも低く,
前記負極接続材の融点は,
前記負極芯材の融点よりも低いことを特徴とする積層電極体型電池。 - 請求項1に記載の積層電極体型電池において,
前記正極接続材の融点は,
前記正極集電体の融点よりも低く,
前記負極接続材の融点は,
前記負極集電体の融点よりも低いことを特徴とする積層電極体型電池。 - 請求項1に記載の積層電極体型電池において,
前記正極芯材の材質が,アルミニウムであり,
前記負極芯材の材質が,銅であり,
前記正極接続材の材質が,
Al-Si系ロウ材,Al-Si-Mg系ロウ材,Al-Zn系ロウ材,Zn-Sn系ロウ材のいずれかのロウ材であり,
前記負極接続材の材質が,
Ni系ロウ材,Ag系ロウ材,Cu系ロウ材のいずれかのロウ材であることを特徴とする積層電極体型電池。 - 請求項2に記載の積層電極体型電池において,
前記正極芯材および前記正極集電体の材質が,アルミニウムであり,
前記負極芯材および前記負極集電体の材質が,銅であり,
前記正極接続材の材質が,
Al-Si系ロウ材,Al-Si-Mg系ロウ材,Al-Zn系ロウ材,Zn-Sn系ロウ材のいずれかのロウ材であり,
前記負極接続材の材質が,
Ni系ロウ材,Ag系ロウ材,Cu系ロウ材のいずれかのロウ材であることを特徴とする積層電極体型電池。 - 請求項1から請求項4までのいずれかに記載の積層電極体型電池において,
前記正極板と前記負極板との間に非水電解質を備えることを特徴とする積層電極体型電池。 - 請求項1から請求項5までのいずれかに記載の積層電極体型電池において,
前記正極芯材の先端部の厚みと,前記正極合材層が形成された範囲における前記正極芯材の厚みとの差が,
前記正極合材層が形成された範囲における前記正極芯材の厚みの12%の範囲内にあることを特徴とする積層電極体型電池。 - 請求項1から請求項6までのいずれかに記載の積層電極体型電池において,
前記負極芯材の先端部の厚みと,前記負極合材層が形成された範囲における前記負極芯材の厚みとの差が,
前記負極合材層が形成された範囲における前記負極芯材の厚みの3%の範囲内にあることを特徴とする積層電極体型電池。 - 正極芯材の少なくとも片側の面の一部に正極合材層が形成された正極板と,負極芯材の少なくとも片側の面の一部に負極合材層が形成された負極板と,前記正極板と前記負極板との間に配置されるセパレータとが,前記正極芯材の残部と前記負極芯材の残部とがそれぞれ異なる方向に突出するように積層された積層電極体と,
前記積層電極体の前記正極板から突出した前記正極芯材の先端部と接合された正極集電体と,
前記積層電極体の前記負極板から突出した前記負極芯材の先端部と接合された負極集電体とを有する積層電極体型電池において,
前記正極芯材の先端部の厚みと,前記正極合材層が形成された範囲における前記正極芯材の厚みとの差が,
前記正極合材層が形成された範囲における前記正極芯材の厚みの12%の範囲内にあることを特徴とする積層電極体型電池。 - 正極芯材の少なくとも片側の面の一部に正極合材層が形成された正極板と,負極芯材の少なくとも片側の面の一部に負極合材層が形成された負極板と,前記正極板と前記負極板との間に配置されるセパレータとが,前記正極芯材の残部と前記負極芯材の残部とがそれぞれ異なる方向に突出するように積層された積層電極体と,
前記積層電極体の前記正極板から突出した前記正極芯材の先端部と接合された正極集電体と,
前記積層電極体の前記負極板から突出した前記負極芯材の先端部と接合された負極集電体とを有する積層電極体型電池において,
前記負極芯材の先端部の厚みと,前記負極合材層が形成された範囲における前記負極芯材の厚みとの差が,
前記負極合材層が形成された範囲における前記負極芯材の厚みの3%の範囲内にあることを特徴とする積層電極体型電池。 - 請求項1から請求項9までのいずれかに記載の積層電極体型電池を搭載することを特徴とする車両。
- 請求項1から請求項9までのいずれかに記載の積層電極体型電池を搭載することを特徴とする機器。
- 正極芯材の少なくとも片側の面の一部に正極合材層が形成された正極板と,負極芯材の少なくとも片側の面の一部に負極合材層が形成された負極板と,前記正極板と前記負極板との間に配置されるセパレータとを,前記正極芯材の残部と前記負極芯材の残部とがそれぞれ異なる方向に突出するように積層して積層電極体とし,
前記積層電極体の前記正極板から突出した前記正極芯材の先端部を正極集電体に接合し,
前記積層電極体の前記負極板から突出した前記負極芯材の先端部を負極集電体に接合する積層電極体型電池の製造方法において,
前記正極芯材の先端部と前記正極集電体との接合に,前記正極芯材よりも融点の低い正極用ロウ材を用い,
前記負極芯材の先端部と前記負極集電体との接合に,前記負極芯材よりも融点の低い負極用ロウ材を用いることを特徴とする積層電極体型電池の製造方法。 - 請求項12に記載の積層電極体型電池の製造方法において,
前記正極用ロウ材として,
前記正極集電体の融点よりも低い融点のロウ材を用い,
前記負極用ロウ材として,
前記負極集電体の融点よりも低い融点のロウ材を用いることを特徴とする積層電極体型電池の製造方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2010/056061 WO2011125151A1 (ja) | 2010-04-02 | 2010-04-02 | 積層電極体型電池とその製造方法及び車両及び機器 |
US13/638,630 US9034500B2 (en) | 2010-04-02 | 2010-04-02 | Laminated electrode-type battery, manufacturing method therefor, vehicle, and device |
DE112010005442.8T DE112010005442B4 (de) | 2010-04-02 | 2010-04-02 | Geschichtete Elektroden-Typ-Batterie, Herstellungsverfahren dafür, Fahrzeug und Vorrichtung |
CN201080065891.9A CN102893428B (zh) | 2010-04-02 | 2010-04-02 | 叠层电极体型电池及其制造方法以及车辆和设备 |
JP2012509202A JP5447656B2 (ja) | 2010-04-02 | 2010-04-02 | 積層電極体型電池とその製造方法及び車両及び機器 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2010/056061 WO2011125151A1 (ja) | 2010-04-02 | 2010-04-02 | 積層電極体型電池とその製造方法及び車両及び機器 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011125151A1 true WO2011125151A1 (ja) | 2011-10-13 |
Family
ID=44762138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/056061 WO2011125151A1 (ja) | 2010-04-02 | 2010-04-02 | 積層電極体型電池とその製造方法及び車両及び機器 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9034500B2 (ja) |
JP (1) | JP5447656B2 (ja) |
CN (1) | CN102893428B (ja) |
DE (1) | DE112010005442B4 (ja) |
WO (1) | WO2011125151A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013114867A (ja) * | 2011-11-28 | 2013-06-10 | Gs Yuasa Corp | 蓄電素子極板及びそれを使用した蓄電素子 |
KR101833609B1 (ko) * | 2015-03-03 | 2018-02-28 | 도요타지도샤가부시키가이샤 | 축전 장치의 제조 방법 및 축전 장치 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5546369B2 (ja) * | 2010-06-25 | 2014-07-09 | 千住金属工業株式会社 | 蓄電デバイス用電極、その製造方法及びその接続方法 |
JP2018045948A (ja) * | 2016-09-16 | 2018-03-22 | トヨタ自動車株式会社 | 積層型電池 |
JP6607225B2 (ja) * | 2017-04-13 | 2019-11-20 | トヨタ自動車株式会社 | 積層型電池 |
JP6518821B1 (ja) * | 2018-06-06 | 2019-05-22 | 日本碍子株式会社 | セルスタック装置 |
US20230110772A1 (en) | 2020-03-17 | 2023-04-13 | 3M Innovative Properties Company | Immobilized pH Indicator for Biological Indicator Growth Indication |
WO2022158856A1 (ko) * | 2021-01-19 | 2022-07-28 | 주식회사 엘지에너지솔루션 | 서브 셀 및 그 제조 방법, 그리고 서브 셀을 포함하는 원통형 이차전지, 배터리 팩 및 자동차 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000200596A (ja) * | 1998-12-28 | 2000-07-18 | Japan Storage Battery Co Ltd | 非水電解質電池 |
JP2000200589A (ja) * | 1999-01-08 | 2000-07-18 | Japan Storage Battery Co Ltd | 非水電解質電池及びその製造方法 |
JP2003223875A (ja) * | 2002-01-30 | 2003-08-08 | Japan Storage Battery Co Ltd | 電 池 |
JP2004006407A (ja) * | 2003-07-29 | 2004-01-08 | Matsushita Electric Ind Co Ltd | 電池の製造方法 |
JP2004158394A (ja) * | 2002-11-08 | 2004-06-03 | Ngk Insulators Ltd | リチウム二次電池 |
WO2009110250A1 (ja) * | 2008-03-07 | 2009-09-11 | パナソニック株式会社 | リチウムイオン二次電池およびその製造方法 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3738177B2 (ja) | 1999-09-21 | 2006-01-25 | 三洋電機株式会社 | 非水電解液二次電池及びその製造方法 |
JP4592845B2 (ja) * | 1999-09-21 | 2010-12-08 | パナソニック株式会社 | 電池 |
JP2001266899A (ja) | 2000-03-24 | 2001-09-28 | Sanyo Electric Co Ltd | 長尺状電極板、円筒形電池及びそれらの製造方法 |
US6696199B2 (en) | 2002-01-30 | 2004-02-24 | Japan Storage Battery Co., Ltd. | Battery |
JP4401065B2 (ja) | 2002-09-30 | 2010-01-20 | 三洋電機株式会社 | 二次電池及びその製造方法 |
JP2004139898A (ja) | 2002-10-18 | 2004-05-13 | Matsushita Electric Ind Co Ltd | 円筒型蓄電池 |
JP4834952B2 (ja) | 2003-10-02 | 2011-12-14 | 株式会社Gsユアサ | 電池 |
KR100803470B1 (ko) * | 2004-04-19 | 2008-02-14 | 마쯔시다덴기산교 가부시키가이샤 | 리튬이온 2차전지 및 그 제조법 |
KR100599793B1 (ko) | 2004-05-19 | 2006-07-13 | 삼성에스디아이 주식회사 | 이차 전지와 이에 사용되는 전극 조립체 |
-
2010
- 2010-04-02 US US13/638,630 patent/US9034500B2/en active Active
- 2010-04-02 WO PCT/JP2010/056061 patent/WO2011125151A1/ja active Application Filing
- 2010-04-02 JP JP2012509202A patent/JP5447656B2/ja active Active
- 2010-04-02 CN CN201080065891.9A patent/CN102893428B/zh active Active
- 2010-04-02 DE DE112010005442.8T patent/DE112010005442B4/de active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000200596A (ja) * | 1998-12-28 | 2000-07-18 | Japan Storage Battery Co Ltd | 非水電解質電池 |
JP2000200589A (ja) * | 1999-01-08 | 2000-07-18 | Japan Storage Battery Co Ltd | 非水電解質電池及びその製造方法 |
JP2003223875A (ja) * | 2002-01-30 | 2003-08-08 | Japan Storage Battery Co Ltd | 電 池 |
JP2004158394A (ja) * | 2002-11-08 | 2004-06-03 | Ngk Insulators Ltd | リチウム二次電池 |
JP2004006407A (ja) * | 2003-07-29 | 2004-01-08 | Matsushita Electric Ind Co Ltd | 電池の製造方法 |
WO2009110250A1 (ja) * | 2008-03-07 | 2009-09-11 | パナソニック株式会社 | リチウムイオン二次電池およびその製造方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013114867A (ja) * | 2011-11-28 | 2013-06-10 | Gs Yuasa Corp | 蓄電素子極板及びそれを使用した蓄電素子 |
KR101833609B1 (ko) * | 2015-03-03 | 2018-02-28 | 도요타지도샤가부시키가이샤 | 축전 장치의 제조 방법 및 축전 장치 |
US10014512B2 (en) | 2015-03-03 | 2018-07-03 | Toyota Jidosha Kabushiki Kaisha | Method of manufacturing electric power storage device, and electric power storage device |
Also Published As
Publication number | Publication date |
---|---|
US20130022849A1 (en) | 2013-01-24 |
US9034500B2 (en) | 2015-05-19 |
JPWO2011125151A1 (ja) | 2013-07-08 |
DE112010005442T5 (de) | 2013-04-11 |
CN102893428A (zh) | 2013-01-23 |
DE112010005442B4 (de) | 2019-07-11 |
CN102893428B (zh) | 2015-03-25 |
JP5447656B2 (ja) | 2014-03-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5447656B2 (ja) | 積層電極体型電池とその製造方法及び車両及び機器 | |
JP4301340B2 (ja) | 組電池 | |
JP5112429B2 (ja) | バッテリーセル用電極板及びその製造方法 | |
JP5558265B2 (ja) | 電池 | |
JP5166511B2 (ja) | リチウムイオン二次電池およびその製造方法 | |
JP2012199162A (ja) | ラミネート外装体二次電池 | |
JP5550923B2 (ja) | 角形二次電池の製造方法 | |
WO2018180828A1 (ja) | 円筒形電池 | |
JP2009038004A (ja) | 積層型電池 | |
JP2010086780A (ja) | 角形二次電池 | |
JPWO2011040297A1 (ja) | 蓄電デバイス組立構造体と蓄電デバイス単位構造体 | |
JP5624507B2 (ja) | 組電池 | |
JP2012164476A (ja) | ラミネート形電池およびそれを備えた積層型電池 | |
JP2011048991A (ja) | リチウムイオン二次電池 | |
JP2009110812A (ja) | 電池及びその製造方法 | |
JP2011216205A (ja) | ラミネート形電池およびその製造方法 | |
JP5119615B2 (ja) | 二次電池及び組電池 | |
KR101722662B1 (ko) | 파우치형 이차 전지 | |
WO2014163184A1 (ja) | 二次電池の集電構造及び二次電池の集電構造形成方法 | |
CN102792488B (zh) | 电池及其制造方法 | |
JP5954339B2 (ja) | 角形二次電池及びその製造方法 | |
CN111682151B (zh) | 密闭型电池及其制造方法 | |
JP7479104B1 (ja) | 電極シート及び2次電池 | |
WO2024079945A1 (ja) | リチウム2次電池 | |
JP2019032985A (ja) | 非水電解質二次電池及び電池パックの製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201080065891.9 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10849395 Country of ref document: EP Kind code of ref document: A1 |
|
DPE1 | Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2012509202 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13638630 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1120100054428 Country of ref document: DE Ref document number: 112010005442 Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 10849395 Country of ref document: EP Kind code of ref document: A1 |