WO2010073827A1 - 正極タブリード及び負極タブリード並びに電池 - Google Patents
正極タブリード及び負極タブリード並びに電池 Download PDFInfo
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- WO2010073827A1 WO2010073827A1 PCT/JP2009/068986 JP2009068986W WO2010073827A1 WO 2010073827 A1 WO2010073827 A1 WO 2010073827A1 JP 2009068986 W JP2009068986 W JP 2009068986W WO 2010073827 A1 WO2010073827 A1 WO 2010073827A1
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- tab lead
- electrode tab
- coating layer
- positive electrode
- 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
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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
- H01M50/571—Methods or arrangements for affording protection against corrosion; Selection of materials therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/172—Arrangements of electric connectors penetrating the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
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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
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
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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
- H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/562—Terminals characterised by the material
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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
Definitions
- the present invention relates to a tab lead for a secondary battery such as a lithium secondary battery, a positive electrode tab lead and a negative electrode tab lead which are preferably used as a tab lead for a capacitor.
- the term “aluminum” is used to include aluminum and its alloys, and the term “copper” is used to include copper and its alloys. Further, in this specification and claims, the term “battery” is used to include not only a battery such as a secondary battery but also a capacitor.
- the battery is configured as an assembled battery formed by electrically connecting these single cells. That is, the electrode terminals (tab leads) of a plurality of single cells are joined together to form an assembled battery. Conventionally, such tab leads are often joined by welding.
- the present invention has been made in view of such a technical background, and an object thereof is to provide a positive electrode tab lead, a negative electrode tab lead, and a battery capable of bonding tab leads with a sufficient bonding force at a low energy cost. To do.
- the present invention provides the following means.
- a positive electrode tab lead wherein a partial coating layer made of nickel, tin, or solder is formed on at least a part of a region of the aluminum plate exposed to the outside of the exterior body.
- a negative electrode tab lead having a nickel coating layer formed on the entire surface of a copper plate.
- a nickel coating layer is formed on the entire surface of the copper plate, and a partial coating layer made of tin or solder is formed on at least a part of the outer surface of the nickel coating layer exposed to the exterior of the exterior body.
- the negative electrode tab lead characterized by the above-mentioned.
- a battery main body portion including a positive electrode, a negative electrode, and an electrolyte; an outer package enclosing the battery main body portion; a positive electrode tab lead electrically connected to the positive electrode; and an electric connection to the negative electrode
- the positive electrode tab lead is formed by forming a partial coating layer made of nickel, tin or solder on at least a part of the exposed region of the aluminum plate
- the negative electrode tab lead is a battery in which a nickel coating layer is formed on the entire surface of a copper plate.
- a battery main body portion including a positive electrode, a negative electrode, and an electrolyte; an outer package enclosing the battery main body portion; a positive electrode tab lead electrically connected to the positive electrode; and an electric connection to the negative electrode
- the positive electrode tab lead is formed by forming a partial coating layer made of nickel on at least a part of the exposed region of the aluminum plate
- the negative electrode tab lead is a battery in which a nickel coating layer is formed on the entire surface of a copper plate.
- a battery main body portion including a positive electrode, a negative electrode, and an electrolyte; an outer package enclosing the battery main body portion; a positive electrode tab lead electrically connected to the positive electrode; and an electric connection to the negative electrode
- the positive electrode tab lead is formed by forming a partial coating layer made of tin on at least a part of the exposed region of the aluminum plate
- the negative electrode tab lead is a battery in which a nickel coating layer is formed on the entire surface of a copper plate and a partial coating layer made of tin is formed on at least a part of the exposed region of the nickel coating layer.
- a battery main body portion including a positive electrode, a negative electrode, and an electrolyte; an outer package enclosing the battery main body portion; a positive electrode tab lead electrically connected to the positive electrode; and an electric connection to the negative electrode
- the positive electrode tab lead is formed by forming a partial coating layer made of solder on at least a part of the exposed region of the aluminum plate
- the negative electrode tab lead is a battery in which a nickel coating layer is formed on the entire surface of a copper plate and a partial coating layer made of solder is formed on at least a part of the exposed region of the nickel coating layer.
- the partial coating layer is formed in the entire area of the aluminum plate exposed outside the exterior body (excluding the side end face), the corrosion resistance of the externally exposed area can be improved. The durability reliability of the battery can be further improved.
- the partial coating layer (13) may be formed in the side end surface (11a) of the area
- the nickel coating layer is formed on the entire surface of the copper plate (excluding the side end faces), the tab leads can be joined to each other with a sufficient joining force by soldering. Further, since the tab leads can be joined to each other by soldering, the energy cost at the time of joining is small and economical.
- the nickel coating layer (22) may be formed on the side end surface of the copper plate (see FIG. 5), or the nickel coating layer may not be formed. Any configuration is included.
- a nickel coating layer is formed on the entire surface of the copper plate (excluding the side end surfaces), and at least one of the regions exposed to the outside of the exterior body on the outer surface of the nickel coating layer. Since the partial coating layer made of tin or solder is formed on the part, the tab leads can be joined to each other with a sufficient joining force by solder joining. Further, since the tab leads can be joined to each other by soldering, the energy cost at the time of joining is small and economical.
- the nickel coating layer (22) may be formed on the side end surface of the copper plate (see FIG. 7), or the nickel coating layer may not be formed. Any configuration is included.
- the chitosan layer containing one or more chitosans selected from the group consisting of chitosan and chitosan derivatives is further formed on the surface, the negative electrode tab lead and the insulating tab The adhesiveness with the film can be further improved, whereby the durability reliability of the battery can be further improved.
- the positive electrode tab lead is formed by forming a partial coating layer made of nickel, tin or solder on at least a part of the exposed region of the aluminum plate, and the negative electrode tab lead is the entire surface of the copper plate (however, (Excluding the side end face), a nickel coating layer is formed, so that when a unit cell having such a configuration is electrically connected to form a battery assembly, for example, one unit cell
- the partial coating layer of the positive electrode tab lead and the nickel coating layer of the negative electrode tab lead of another unit cell can be bonded with a sufficient bonding force by solder bonding.
- the tab leads can be joined to each other by soldering, the energy cost at the time of joining is small and economical.
- the nickel coating layer (22) may be formed on the side end surface of the copper plate (see FIG. 5), or the nickel coating layer may not be formed. Any configuration is included.
- the positive electrode tab lead is formed by forming a partial coating layer made of nickel on at least a part of the exposed region of the aluminum plate, and the negative electrode tab lead is the entire surface of the copper plate (excluding the side end surfaces). ))
- a nickel coating layer is formed, and when the unit cells having such a configuration are electrically connected to each other to form an assembled battery, for example, the positive tab lead of one unit cell
- the partial coating layer and the nickel coating layer of the negative electrode tab lead of another unit cell can be bonded with a sufficient bonding force by solder bonding. Further, since the tab leads can be joined to each other by soldering, the energy cost at the time of joining is small and economical.
- the partial coating layer of the positive electrode tab lead and the nickel coating layer of the negative electrode tab lead are the same kind of metal (nickel), there is an advantage that the cost required for forming these layers can be reduced.
- the nickel coating layer (22) may be formed on the side end surface of the copper plate (see FIG. 5), or the nickel coating layer may not be formed. Any configuration is included.
- the positive electrode tab lead is formed by forming a partial coating layer made of tin on at least a part of the exposed region of the aluminum plate, and the negative electrode tab lead is the entire surface of the copper plate (excluding the side end surfaces). ) And a nickel coating layer and at least a part of the exposed region of the nickel coating layer is formed with a partial coating layer made of tin.
- the partial coating layer of the positive electrode tab lead of one unit cell and the partial coating layer of the negative electrode tab lead of another unit cell are bonded with sufficient bonding force by solder bonding. be able to.
- the tab leads can be joined to each other by soldering, the energy cost at the time of joining is small and economical.
- the nickel coating layer (22) may be formed on the side end surface of the copper plate (see FIG. 7), or the nickel coating layer may not be formed. Any configuration is included.
- the positive electrode tab lead is formed by forming a partial coating layer made of solder on at least a part of the exposed region of the aluminum plate, and the negative electrode tab lead is the entire surface of the copper plate (excluding the side end surfaces). ) And a nickel coating layer and a partial coating layer made of solder is formed on at least a part of the exposed region of the nickel coating layer.
- the partial coating layer of the positive electrode tab lead of one unit cell and the partial coating layer of the negative electrode tab lead of another unit cell are bonded with sufficient bonding force by solder bonding. be able to.
- the tab leads can be joined to each other by soldering, the energy cost at the time of joining is small and economical.
- the nickel coating layer (22) may be formed on the side end surface of the copper plate (see FIG. 7), or the nickel coating layer may not be formed. Any configuration is included.
- the partial coating layer is formed in the entire area (excluding the side end face) of the aluminum plate of the positive electrode tab lead that is exposed to the outside, the corrosion resistance of this externally exposed area.
- the durability of the battery can be further improved.
- the partial coating layer (13) may be formed on the side end surface (11a) of the region exposed to the outside of the exterior body of the aluminum plate of the positive electrode tab lead (see FIG. 9), or the partial coating layer. (13) may not be formed (see FIG. 8), and the invention [14] includes any of these configurations.
- FIG. 1 is a perspective view showing one embodiment of a battery according to the present invention, and (b) is an enlarged sectional view taken along line XX in (a). It is a top view which shows the positive electrode tab lead of the battery which concerns on one Embodiment of this invention, and its vicinity.
- FIG. 3 is a sectional view taken along line AA in FIG. 2. It is a top view which shows the negative electrode tab lead of the battery which concerns on one Embodiment of this invention, and its vicinity.
- FIG. 5 is a sectional view taken along line BB in FIG. 4. It is a top view which shows the negative electrode tab lead of the battery which concerns on other embodiment of this invention, and its vicinity. It is sectional drawing of the CC line in FIG. It is sectional drawing which shows the positive electrode tab lead of the battery which concerns on other embodiment of this invention, and its vicinity. It is sectional drawing which shows the positive electrode tab lead of the battery which concerns on further another embodiment of this invention, and its vicinity.
- FIG. 1 shows an embodiment of a battery (30) according to the present invention.
- the battery (30) of the first embodiment is a non-aqueous electrolyte lithium secondary battery.
- a film-like positive electrode (33) and a film-like negative electrode (34) are arranged in a superposed manner with a separator (36) interposed therebetween, and between these positive electrode (33) and negative electrode (34).
- the non-aqueous electrolyte (35) is interposed in the battery, and is configured to be chargeable / dischargeable by transmission of lithium ions.
- the battery body (32) including the positive electrode (33), the negative electrode (34), and the electrolyte (35) is covered in a liquid-tight state by the exterior body (31), that is, the interior of the exterior body (31). (See FIG. 1).
- a positive electrode tab lead (1) is electrically connected to the positive electrode (33), and a part of the positive electrode tab lead (1) is exposed (derived) from the exterior body (31) ( 1 to 3).
- the positive electrode tab lead (1) is formed with a partial coating layer (13) made of nickel on a part (tip portion) of the externally exposed region of the aluminum plate (11).
- a chitosan layer (14) containing chitosans is formed on the outermost surface.
- the nickel coating layer is not formed in the area
- insulating tab films (15) and (15) are adhered to both sides of the intermediate region in the length direction of the positive electrode tab lead (1), and further this insulating tab film (15) ( 15) is arranged so that the edge of the outer package (31) is sandwiched, and the edge of the outer package (31) is sealed and bonded by heat sealing or the like.
- the negative electrode tab lead (2) is electrically connected to the negative electrode (34), and a part of the negative electrode tab lead (2) is exposed to the outside of the outer package (31) (derived). (See FIGS. 1, 4, and 5).
- the negative electrode tab lead (2) has a nickel coating layer (22) formed on the entire surface of the copper plate (21) and the entire outer surface of the nickel coating layer (22). In which a chitosan layer (24) containing chitosans is formed.
- insulating tab films (25) and (25) are attached to both sides of the intermediate region in the length direction of the negative electrode tab lead (2), and further this insulating tab film (25) ( 25) is arranged so that the edge of the exterior body (31) is sandwiched, and the edge of the exterior body (31) is sealed and bonded by heat sealing or the like.
- the unit cells (30) having the above-described configuration are electrically connected to form a battery pack, for example, the partial coating layer (13) of the positive electrode tab lead (1) of one unit cell (30) and the other If the nickel coating layer (22) of the negative electrode tab lead (2) of the unit cell (30) is joined by solder joint, the joint can be made with a sufficient joining force.
- the following configuration (second embodiment) may be adopted. That is, in the battery of the above embodiment, as the positive electrode tab lead (1), a partial coating layer (13) made of tin is formed on a part (tip portion) of the externally exposed region of the aluminum plate (11), and Furthermore, while using a chitosan layer (14) containing chitosans formed on the outermost surface (see FIG. 3), the negative electrode tab lead (2) is a copper plate (21) as shown in FIGS. A nickel coating layer (22) is formed on the entire surface of the substrate, and a partial coating layer (23) made of tin is formed on a part of the exposed region of the nickel coating layer (22), and further contains chitosans on the outermost surface. A structure using a chitosan layer (24) formed may be employed. A tin coating layer is not formed in a region of the aluminum plate (11) disposed in the exterior body (31).
- insulating tab films (15) and (15) are attached to both sides of the intermediate region in the length direction of the positive electrode tab lead (1). ) (15) is sandwiched between the edges of the exterior body (31), and the edges of the exterior body (31) are sealed and joined by heat sealing or the like.
- insulating tab films (25) and (25) are attached to both sides of the intermediate region in the length direction of the negative electrode tab lead (2), and further this insulating tab film (25 ) (25) is sandwiched between the edges of the exterior body (31), and the edges of the exterior body (31) are sealed and joined by heat sealing or the like.
- a partial coating layer made of tin of the positive electrode tab lead (1) of one unit cell (30) ( 13) and the partial coating layer (23) made of tin of the negative electrode tab lead (2) of the other unit cell (30) can be bonded with a sufficient bonding force if they are bonded by solder bonding.
- the battery (30) according to the present invention may employ the following configuration (third embodiment). That is, in the battery of the second embodiment, as the positive electrode tab lead (1), a partial coating layer (13) made of solder is formed on a part (tip portion) of the externally exposed region of the aluminum plate (11). In addition, while using a chitosan layer (14) containing chitosans on the outermost surface (see FIG. 3), as the negative electrode tab lead (2), as shown in FIGS. 21) A nickel coating layer (22) is formed on the entire surface, a partial coating layer (23) made of solder is formed on a part of the exposed region of the nickel coating layer (22), and chitosans are further formed on the outermost surface. You may employ
- insulating tab films (15) and (15) are attached to both sides of the intermediate region in the length direction of the positive electrode tab lead (1). ) (15) is sandwiched between the edges of the exterior body (31), and the edges of the exterior body (31) are sealed and joined by heat sealing or the like.
- insulating tab films (25) and (25) are attached to both sides of the intermediate region in the length direction of the negative electrode tab lead (2), and further this insulating tab film (25 ) (25) is sandwiched between the edges of the exterior body (31), and the edges of the exterior body (31) are sealed and joined by heat sealing or the like.
- a partial coating layer for example, solder of the positive electrode tab lead (1) of one unit cell (30) 13
- the partial coating layer (23) made of solder of the negative electrode tab lead (2) of another unit cell (30) can be joined with sufficient joining force.
- the partial coating layer (13) is formed in a part of the region exposed to the outside of the exterior body (31) in the aluminum plate (11).
- the configuration has been adopted, it is not particularly limited to such a configuration.
- a structure in which the partial coating layer (13) is formed may be adopted, or the entire area (including the side end face 11a) of the aluminum plate (11) exposed to the outside of the exterior body (31) may be adopted.
- the positive electrode tab lead (1) has a partial coating layer (13) made of nickel on the entire externally exposed region (excluding the side end surface 11a) of the aluminum plate (11).
- the outermost surface further comprises a chitosan layer (14) containing chitosans. That is, in the present embodiment, an insulating tab film made of polypropylene resin is used in a mode in which the partial coating layer (13) is formed on both sides of the lengthwise intermediate region of the positive electrode tab lead (1). 15) A configuration in which (15) is heat-welded is adopted.
- the edge part of the said exterior body (31) is arrange
- the nickel coating layer is not formed in the area
- FIG. 1 An example of the latter is shown in FIG.
- a partial coating layer (13) made of nickel is formed on the entire externally exposed region (including the side end surface 11a) of the aluminum plate (11) of the positive electrode tab lead (1).
- the configuration is the same as the configuration of FIG.
- the method for forming the partial coating layers (13) and (23) is not particularly limited.
- the thickness of the partial coating layers (13) and (23) is preferably set to 1 to 10 ⁇ m.
- the method for forming the nickel coating layer (22) is not particularly limited, and examples thereof include a clad rolling method, a dip plating method, an electroplating method, a vapor deposition method, a CVD method, and a PVD method. Among these, it is preferable to use an immersion plating method or an electroplating method in terms of productivity and cost.
- the thickness of the nickel coating layer (22) is preferably set to 1 to 10 ⁇ m.
- the surface roughness Ra of the aluminum plate (11) is preferably set in the range of 0.03 to 0.5 ⁇ m. By setting to such a range, the adhesiveness of a positive electrode tab lead (1) and an insulating tab film (15) can be improved.
- the surface roughness in such a range can be formed by a method such as emboss rolling, hairline processing, shot blasting, or chemical etching.
- the surface roughness Ra of the nickel coating layer (22) formed on the copper plate (21) is preferably set in the range of 0.03 to 0.5 ⁇ m. By being set in such a range, the adhesion between the negative electrode tab lead (2) and the insulating tab film (25) can be improved.
- the surface roughness in such a range can be formed by a method such as emboss rolling, hairline processing, shot blasting, or chemical etching.
- the surface roughness Ra is a value measured in accordance with JIS B0601-2001.
- the thickness of the aluminum plate (11) is preferably set to 0.1 to 1 mm, and the thickness of the copper plate (21) is preferably set to 0.1 to 1 mm.
- chitosans constituting the chitosan layers (14) and (24) one or more compounds selected from the group consisting of chitosan and chitosan derivatives are used.
- the chitosan derivative is not particularly limited, and examples thereof include carboxymethyl chitosan, cationized chitosan, hydroxyalkyl chitosan, glycerylated chitosan, salts of these chitosans with acids, and the like.
- a method for forming the chitosan layers (14) and (24) is not particularly limited.
- a treatment liquid containing the chitosans may be applied by a dipping method, a roll coating method, a gravure coating method, or the like.
- coating to a surface and drying is mentioned.
- the solid content coating amount of the chitosan layers (14) and (24) is preferably set to 0.1 to 50 mg / m 2 .
- the positive electrode (33) is not particularly limited, and for example, a well-known positive electrode material can be used for a nonaqueous electrolyte battery.
- a lithium salt as a positive electrode active material can be used.
- LiCoO 2, LiNiO 2, LiMnO 2, LiFeO 2 carbon powder as a conductive agent, a mixture composition PVDF were mixed as a binder, coating the surface of the aluminum plate is a positive electrode current collector, dried
- the positive electrode formed by the above can be illustrated.
- the carbon powder is not particularly limited, and examples thereof include powdery graphite, granular graphite, fullerene graphite, and carbon nanotube.
- the negative electrode (34) is not particularly limited, and for example, a known negative electrode material for a non-aqueous electrolyte battery can be used. Specifically, for example, graphite powder as a negative electrode active material, Examples include a negative electrode formed by applying and drying a mixed composition obtained by mixing PVDF as an adhesive on the surface of a copper plate as a negative electrode current collector.
- the electrolyte (35) is not particularly limited, and for example, a known nonaqueous electrolyte for a nonaqueous electrolyte battery can be used.
- a gel-like one containing a non-aqueous solvent and an electrolyte is suitable.
- the non-aqueous solvent is not particularly limited, and examples thereof include ethylene carbonate and propylene carbonate.
- the electrolyte is not particularly limited, and examples thereof include LiPF 6 and LiClO 4 .
- the separator (36) is not particularly limited, and for example, a known separator for a nonaqueous electrolyte battery can be used. Specifically, porous polypropylene etc. are mentioned, for example.
- said exterior body (31) Although it does not specifically limit as said exterior body (31), for example, what laminated
- the insulating tab films (15) and (25) are not particularly limited, and examples thereof include insulating films made of polyethylene, polypropylene, and the like.
- a nickel partial coating layer (partial plating layer) (13) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m is formed on both sides of the tip of an aluminum plate (11) by electroplating to form a positive electrode tab lead. (1) was obtained. Further, a nickel plating coating layer (22) having a thickness of 3 ⁇ m was formed on the entire surface of a copper plate (21) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m by electroplating to obtain a negative electrode tab lead (2).
- the partial coating layer (13) of the positive electrode tab lead and the nickel plating coating layer (22) of the negative electrode tab lead (2) were joined by solder bonding.
- the electrical energy required for this solder joint was 0.1 kWs.
- a partial coating layer (partial plating layer) (13) of tin of 3 ⁇ m on one side is formed on both sides of the tip of an aluminum plate (11) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m by a positive electrode tab lead. (1) was obtained. Further, a nickel plating coating layer (22) having a thickness of 3 ⁇ m is formed by electroplating on the entire surface of a copper plate (21) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m, and further the nickel plating coating layer (22). A partial coating layer (partial plating layer) (23) of tin having a thickness of 3 ⁇ m on one side was formed on both sides of the tip of the negative electrode tab lead (2).
- the tin partial coating layer (13) of the positive electrode tab lead and the tin partial coating layer (23) of the negative electrode tab lead (2) were joined by solder bonding.
- the electrical energy required for this solder joint was 0.1 kWs.
- a partial coating layer (partial plating layer) (13) of solder of 3 ⁇ m on one side is formed on both sides of the tip of an aluminum plate (11) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m by a positive electrode tab lead. (1) was obtained. Further, a nickel plating coating layer (22) having a thickness of 3 ⁇ m is formed by electroplating on the entire surface of a copper plate (21) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m, and further the nickel plating coating layer (22). A partial coating layer (partial plating layer) (23) of solder having a thickness of 3 ⁇ m on one side was formed on both sides of the tip of the negative electrode tab lead (2).
- solder partial coating layer (13) of the positive electrode tab lead and the solder partial coating layer (23) of the negative electrode tab lead (2) were joined by solder bonding.
- the electrical energy required for this solder joint was 0.1 kWs.
- ⁇ Comparative Example 1> While preparing a positive electrode tab lead made of an aluminum plate having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m, a nickel plate having a thickness of 3 ⁇ m was formed by electroplating on the entire surface of a copper plate having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m. A negative electrode tab lead was obtained by forming a plating coating layer.
- the positive electrode tab lead and the nickel plating coating layer of the negative electrode tab lead were joined by a welding method.
- the electric energy required for this welding joint was 10 kWs.
- the bonding strength between the positive electrode tab lead and the negative electrode tab lead bonded together as described above was evaluated based on the following evaluation method.
- ⁇ Joint strength evaluation method> A tensile test was performed on the positive electrode tab lead and the negative electrode tab lead bonded to each other, thereby measuring the bonding force between the tab leads. The case where the joining force was 60 MPa or more was designated as “ ⁇ ”, and the case where the joining force was less than 60 MPa was designated as “x”.
- the tab leads (joining of the positive electrode tab lead and the negative electrode tab lead) could be joined with a sufficient joining force at a low energy cost.
- Example 4 A nickel partial coating layer (partial plating layer) (13) having a surface roughness Ra of 0.03 ⁇ m and a thickness of 500 ⁇ m on both sides of the tip of the aluminum plate (11) is formed by electroplating on one side.
- An aqueous solution of carboxymethyl chitosan (concentration of 0.5% by mass) was applied to the entire surface of the substrate and dried to form a chitosan layer (14) having a solid content of 50 mg / m 2 , and positive electrode tab leads (1 ) was obtained (see FIG. 3).
- Example 5 A positive electrode tab lead (1) was obtained in the same manner as in Example 4 except that the solid content adhesion amount of the chitosan layer (14) was set to 0.5 mg / m 2 (see FIG. 3).
- Example 6 A positive electrode tab lead (as in Example 4) except that an aluminum plate (11) having a surface roughness Ra of 0.1 ⁇ m was used and the solid content adhesion amount of the chitosan layer (14) was set to 1.0 mg / m 2. 1) was obtained (see FIG. 3).
- a partial coating layer (partial plating layer) (13) of tin of 3 ⁇ m on one side is formed by electroplating on both sides of the tip of an aluminum plate (11) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m.
- An aqueous solution of carboxymethyl chitosan (concentration of 0.5% by mass) was applied to the entire surface of the substrate, and dried to form a chitosan layer (14) with a solid content of 1.0 mg / m 2 , and positive electrode tab lead (1) was obtained (see FIG. 3).
- a solder partial coating layer (partial plating layer) (13) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m on both sides of the tip of the aluminum plate (11) is formed by electroplating on one side of the aluminum plate (11).
- An aqueous solution of carboxymethyl chitosan (concentration of 0.5% by mass) was applied to the entire surface of the substrate, and dried to form a chitosan layer (14) with a solid content of 1.0 mg / m 2 , and positive electrode tab lead (1) was obtained (see FIG. 3).
- a positive electrode tab lead made of an aluminum plate having a surface roughness Ra of 0.03 ⁇ m and a thickness of 500 ⁇ m was prepared.
- the liquid (electrolytic solution) leakage from the positive electrode tab portion when the battery was configured using the positive electrode tab lead obtained as described above was evaluated based on the following evaluation method.
- insulating tab films (15) and (15) made of polypropylene resin are heat-welded on both sides of the intermediate region in the length direction of the positive electrode tab lead (1), and this insulating tab film (15) ( 15), the edge of the exterior body (31) having an unstretched polypropylene layer on the inner surface side was sealed and joined by heat sealing.
- an electrolyte solution LiPF 6 having a concentration of 1 M was sealed in the exterior body (31). This was put in an oven at 85 ° C. for 30 days to conduct a durability test. 1000 samples were prepared for each example, and a durability test was performed on the 1000 samples to count the number of samples in which electrolyte leakage from the positive electrode tab portion occurred (defects occurred).
- Example 9 A nickel coating layer (22) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 3 ⁇ m was formed on the entire surface of a copper plate (21) having a thickness of 500 ⁇ m by electroplating to obtain a negative electrode tab lead (2).
- Example 10 A nickel coating layer (22) having a surface roughness Ra of 0.02 ⁇ m and a thickness of 3 ⁇ m was formed on the entire surface of the copper plate (21) having a thickness of 500 ⁇ m by electroplating, and further on the outer surface of the nickel coating layer (22). An aqueous solution of carboxymethyl chitosan (concentration 0.5% by mass) was applied and dried to form a chitosan layer (24) having a solid content of 1.0 mg / m 2 to obtain a negative electrode tab lead (2). (See FIG. 5).
- Example 11 A negative electrode tab lead (2) was obtained in the same manner as in Example 10 except that a nickel coating layer (22) having a surface roughness Ra of 0.1 ⁇ m was formed (see FIG. 5).
- a nickel coating layer (22) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 3 ⁇ m is formed on the entire surface of a copper plate (21) having a thickness of 500 ⁇ m by electroplating, and the tip of the nickel plating coating layer (22) is further formed.
- a partial coating layer (partial plating layer) (23) of tin of 3 ⁇ m on one side was formed on both sides by electroplating, and an aqueous solution of carboxymethyl chitosan (concentration 0.5% by mass) was applied to the entire surface of these surfaces. And dried to form a chitosan layer (24) having a solid content of 1.0 mg / m 2 to obtain a negative electrode tab lead (2) (see FIG. 7).
- a nickel coating layer (22) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 3 ⁇ m is formed on the entire surface of a copper plate (21) having a thickness of 500 ⁇ m by electroplating, and the tip of the nickel plating coating layer (22) is further formed.
- a partial coating layer (partial plating layer) (23) of solder of 3 ⁇ m on one side was formed on both sides of the substrate by applying an aqueous solution of carboxymethyl chitosan (concentration 0.5% by mass) over the entire surface. And dried to form a chitosan layer (24) having a solid content of 1.0 mg / m 2 to obtain a negative electrode tab lead (2) (see FIG. 7).
- the liquid (electrolyte) leakage from the negative electrode tab portion when the battery was configured using the negative electrode tab lead obtained as described above was evaluated based on the following evaluation method.
- insulating tab films (25) and (25) made of polypropylene resin are heat-welded on both sides of the intermediate region in the length direction of the negative electrode tab lead (2), and this insulating tab film (25 ) (25) was sandwiched between the edges of the exterior body (31) having a non-stretched polypropylene layer on the inner surface side by heat sealing.
- an electrolytic solution LiPF 6 having a concentration of 1 M was sealed in the exterior body (31). This was placed in an oven at 85 ° C. for 30 days to conduct a durability test. 1000 samples were prepared for each example, and a durability test was performed on the 1000 samples, and the number of samples in which electrolyte leakage from the negative electrode tab portion occurred (defects occurred) was counted.
- a partial coating layer (partial plating layer) (13) of nickel of 3 ⁇ m on one side is formed by electroplating on both sides (both sides) of the tip of an aluminum plate (11) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m. Further, an aqueous solution of carboxymethyl chitosan (concentration 0.5 mass%) was applied to the entire surface of these surfaces and dried to form a chitosan layer (14) having a solid content of 50 mg / m 2 , thereby forming a positive electrode.
- a tab lead (1) was obtained (see FIG. 8).
- an insulating tab film (15) (15) made of polypropylene resin is applied to a region where the partial coating layer (13) is formed on both sides of the intermediate region in the length direction of the positive electrode tab lead (1). 15) was heat-welded (see FIG. 8). That is, the positive electrode formed by forming a partial coating layer (partial plating layer) (13) of nickel on the entire area (excluding the side end face 11a) of the aluminum plate (11) exposed to the outside of the exterior body (31). A tab lead (1) was obtained (see FIG. 8).
- a partial coating layer (partial plating layer) (13) of nickel of 3 ⁇ m on one side is formed by electroplating on both sides (both sides) of the tip of an aluminum plate (11) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m. Further, an aqueous solution of carboxymethyl chitosan (concentration 0.5 mass%) was applied to the entire surface of these surfaces and dried to form a chitosan layer (14) having a solid content of 50 mg / m 2 , thereby forming a positive electrode.
- a tab lead (1) was obtained (see FIG. 8).
- an insulating tab film (15) (15) made of polypropylene resin is applied to a region where the partial coating layer (13) is formed on both sides of the intermediate region in the length direction of the positive electrode tab lead (1). 15) was heat-welded (see FIG. 8). That is, a partial coating layer (partial plating layer) (13) of nickel is formed on the entire area of the aluminum plate (11) exposed outside the exterior body (31) (excluding the side end surfaces). A positive electrode tab lead (1) was obtained (see FIG. 8).
- a nickel plating coating layer (22) having a thickness of 3 ⁇ m is formed by electroplating on the entire surface of a copper plate (21) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m. Further, the nickel coating layer (22) An aqueous solution of carboxymethyl chitosan (concentration 0.5 mass%) was applied to the outer surface and dried to form a chitosan layer (24) having a solid content of 50 mg / m 2 to obtain a negative electrode tab lead (2). (See FIG. 5).
- the partial coating layer (13) of the positive electrode tab lead and the nickel plating coating layer (22) of the negative electrode tab lead (2) were joined by solder bonding.
- the electrical energy required for this solder joint was 0.1 kWs.
- a nickel plating coating layer (22) having a thickness of 3 ⁇ m is formed by electroplating on the entire surface of a copper plate (21) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m.
- An aqueous solution of methyl chitosan (concentration: 0.5% by mass) was applied and dried to form a chitosan layer (24) with a solid content of 50 mg / m 2 to obtain a negative electrode tab lead (2) (FIG. 5). reference).
- the partial coating layer (13) of the positive electrode tab lead and the nickel plating coating layer (22) of the negative electrode tab lead (2) were joined by solder bonding.
- the electrical energy required for this solder joint was 0.1 kWs.
- a partial coating layer (partial plating layer) (13) of tin of 3 ⁇ m on one side is formed by electroplating on both sides of the tip of an aluminum plate (11) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m.
- An aqueous solution of carboxymethyl chitosan (concentration of 0.5% by mass) was applied to the entire surface of the substrate and dried to form a chitosan layer (14) having a solid content of 50 mg / m 2 , thereby forming a positive electrode tab lead (1 ) Was obtained (see FIG. 3).
- a nickel plating coating layer (22) having a thickness of 3 ⁇ m is formed by electroplating on the entire surface of a copper plate (21) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m, and further the nickel plating coating layer (22).
- a partial coating layer (partial plating layer) (23) of 3 ⁇ m on one side was formed by electroplating on both sides of the tip of each of the metal, and an aqueous solution of carboxymethyl chitosan (concentration 0.5% by mass) was further formed on the entire surface. ) was applied and dried to form a chitosan layer (24) having a solid content of 50 mg / m 2 to obtain a negative electrode tab lead (2) (see FIG. 7).
- the tin partial coating layer (13) of the positive electrode tab lead and the tin partial coating layer (23) of the negative electrode tab lead (2) were joined by solder bonding.
- the electrical energy required for this solder joint was 0.1 kWs.
- a solder partial coating layer (partial plating layer) (13) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m on both sides of the tip of the aluminum plate (11) is formed by electroplating on one side of the aluminum plate (11).
- An aqueous solution of carboxymethyl chitosan (concentration of 0.5% by mass) was applied to the entire surface of the substrate and dried to form a chitosan layer (14) having a solid content of 50 mg / m 2 , thereby forming a positive electrode tab lead (1 ) was obtained (see FIG. 3).
- a nickel plating coating layer (22) having a thickness of 3 ⁇ m is formed by electroplating on the entire surface of a copper plate (21) having a surface roughness Ra of 0.1 ⁇ m and a thickness of 500 ⁇ m, and further the nickel plating coating layer (22).
- a solder partial coating layer (partial plating layer) (23) having a surface of 3 ⁇ m on one side was formed on both sides of the tip of the metal by an electroplating method, and an aqueous solution of carboxymethyl chitosan (concentration 0.5% by mass) on the entire surface of these surfaces. ) was applied and dried to form a chitosan layer (24) having a solid content of 50 mg / m 2 to obtain a negative electrode tab lead (2) (see FIG. 7).
- solder partial coating layer (13) of the positive electrode tab lead and the solder partial coating layer (23) of the negative electrode tab lead (2) were joined by solder bonding.
- the electrical energy required for this solder joint was 0.1 kWs.
- Example 15 to 18 the bonding force between the positive electrode tab lead and the negative electrode tab lead bonded to each other as described above was evaluated based on the above-described bonding force evaluation method, and in each of Examples 15 to 18 and Comparative Example 1, The corrosion resistance of the joined positive electrode tab lead and negative electrode tab lead was evaluated based on the following evaluation method. These results are shown in Table 5.
- ⁇ Corrosion resistance evaluation method> The positive and negative electrode tab leads joined to each other are set in a salt spray tester (temperature: 35 ° C.) and operated in this state for 500 hours. Then, they are taken out and visually observed for the degree of corrosion. The corrosion resistance was evaluated based on (Criteria) “ ⁇ ”: No trace of corrosion on the aluminum plate and excellent corrosion resistance “O”: Although trace of corrosion on the aluminum plate was slightly observed, it was generally in good condition and had good corrosion resistance A certain “x”: the aluminum plate is significantly corroded by the action of the local battery and is inferior in corrosion resistance.
- the surface roughness Ra of the aluminum plate and the surface roughness Ra of the nickel coating layer (plating layer) formed on the copper plate were adjusted by applying an emboss rolling method to the plate. .
- the positive electrode tab lead and the negative electrode tab lead of the present invention are suitably used, for example, as a tab lead for a secondary battery such as a lithium secondary battery or a tab lead for a capacitor.
Abstract
Description
前記正極タブリードは、アルミニウム板における前記露出領域の少なくとも一部に、ニッケル、錫またはハンダからなる部分コーティング層が形成されたものからなり、
前記負極タブリードは、銅板の全面にニッケル被覆層が形成されたものからなることを特徴とする電池。
前記正極タブリードは、アルミニウム板における前記露出領域の少なくとも一部に、ニッケルからなる部分コーティング層が形成されたものからなり、
前記負極タブリードは、銅板の全面にニッケル被覆層が形成されたものからなることを特徴とする電池。
前記正極タブリードは、アルミニウム板における前記露出領域の少なくとも一部に、錫からなる部分コーティング層が形成されたものからなり、
前記負極タブリードは、銅板の全面にニッケル被覆層が形成されると共にこのニッケル被覆層における前記露出領域の少なくとも一部に錫からなる部分コーティング層が形成されたものからなることを特徴とする電池。
前記正極タブリードは、アルミニウム板における前記露出領域の少なくとも一部に、ハンダからなる部分コーティング層が形成されたものからなり、
前記負極タブリードは、銅板の全面にニッケル被覆層が形成されると共にこのニッケル被覆層における前記露出領域の少なくとも一部にハンダからなる部分コーティング層が形成されたものからなることを特徴とする電池。
も含むものである。
表面粗さRaが0.1μmで厚さ500μmのアルミニウム板(11)の先端部の両側に電気メッキ法により片面3μmのニッケルの部分コーティング層(部分メッキ層)(13)を形成せしめて正極タブリード(1)を得た。また、表面粗さRaが0.1μmで厚さ500μmの銅板(21)の全面に電気メッキ法により厚さ3μmのニッケルメッキ被覆層(22)を形成せしめて負極タブリード(2)を得た。
表面粗さRaが0.1μmで厚さ500μmのアルミニウム板(11)の先端部の両側に電気メッキ法により片面3μmの錫の部分コーティング層(部分メッキ層)(13)を形成せしめて正極タブリード(1)を得た。また、表面粗さRaが0.1μmで厚さ500μmの銅板(21)の全面に電気メッキ法により厚さ3μmのニッケルメッキ被覆層(22)を形成せしめ、さらに該ニッケルメッキ被覆層(22)の先端部の両側に電気メッキ法により片面3μmの錫の部分コーティング層(部分メッキ層)(23)を形成せしめて負極タブリード(2)を得た。
表面粗さRaが0.1μmで厚さ500μmのアルミニウム板(11)の先端部の両側に電気メッキ法により片面3μmのハンダの部分コーティング層(部分メッキ層)(13)を形成せしめて正極タブリード(1)を得た。また、表面粗さRaが0.1μmで厚さ500μmの銅板(21)の全面に電気メッキ法により厚さ3μmのニッケルメッキ被覆層(22)を形成せしめ、さらに該ニッケルメッキ被覆層(22)の先端部の両側に電気メッキ法により片面3μmのハンダの部分コーティング層(部分メッキ層)(23)を形成せしめて負極タブリード(2)を得た。
表面粗さRaが0.1μmで厚さ500μmのアルミニウム板からなる正極タブリードを準備する一方、表面粗さRaが0.1μmで厚さ500μmの銅板の全面に電気メッキ法により厚さ3μmのニッケルメッキ被覆層を形成せしめて負極タブリードを得た。
相互に接合された正極タブリードと負極タブリードに対し引っ張り試験を行うことによって、両タブリード間の接合力を測定した。接合力が60MPa以上であるものを「○」、60MPa未満であるものを「×」とした。
表面粗さRaが0.03μmで厚さ500μmのアルミニウム板(11)の先端部の両側に電気メッキ法により片面3μmのニッケルの部分コーティング層(部分メッキ層)(13)を形成せしめ、さらにこれらの表面の全面に、カルボキシメチルキトサンの水溶液(濃度0.5質量%)を塗布して乾燥させることによって固形分付着量が50mg/m2のキトサン層(14)を形成せしめて正極タブリード(1)を得た(図3参照)。
キトサン層(14)の固形分付着量を0.5mg/m2に設定した以外は、実施例4と同様にして正極タブリード(1)を得た(図3参照)。
表面粗さRaが0.1μmのアルミニウム板(11)を用い、キトサン層(14)の固形分付着量を1.0mg/m2に設定した以外は、実施例4と同様にして正極タブリード(1)を得た(図3参照)。
表面粗さRaが0.1μmで厚さ500μmのアルミニウム板(11)の先端部の両側に電気メッキ法により片面3μmの錫の部分コーティング層(部分メッキ層)(13)を形成せしめ、さらにこれらの表面の全面に、カルボキシメチルキトサンの水溶液(濃度0.5質量%)を塗布して乾燥させることによって固形分付着量が1.0mg/m2のキトサン層(14)を形成せしめて正極タブリード(1)を得た(図3参照)。
表面粗さRaが0.1μmで厚さ500μmのアルミニウム板(11)の先端部の両側に電気メッキ法により片面3μmのハンダの部分コーティング層(部分メッキ層)(13)を形成せしめ、さらにこれらの表面の全面に、カルボキシメチルキトサンの水溶液(濃度0.5質量%)を塗布して乾燥させることによって固形分付着量が1.0mg/m2のキトサン層(14)を形成せしめて正極タブリード(1)を得た(図3参照)。
表面粗さRaが0.03μmで厚さ500μmのアルミニウム板からなる正極タブリードを準備した。
図3に示すように、正極タブリード(1)の長さ方向の中間部領域の両側にポリプロピレン樹脂からなる絶縁タブフィルム(15)(15)を熱溶着せしめ、更にこの絶縁タブフィルム(15)(15)を挟み込む態様で、内面側に非延伸ポリプロピレン層を有する外装体(31)の縁部をヒートシールで封止接合した。なお、封止直前に外装体(31)の内部に電解液(濃度1MのLiPF6)を封入せしめた。これを85℃のオーブン内に30日間入れて耐久性試験を行った。各実施例毎にサンプルを1000個用意し、これら1000個について耐久性試験を行って正極タブ部からの電解液漏れ発生(不良発生)のあったサンプル数を数えた。
厚さ500μmの銅板(21)の全面に電気メッキ法により表面粗さRaが0.1μmで厚さ3μmのニッケル被覆層(22)を形成せしめて負極タブリード(2)を得た。
厚さ500μmの銅板(21)の全面に電気メッキ法により表面粗さRaが0.02μmで厚さ3μmのニッケル被覆層(22)を形成せしめ、さらにこのニッケル被覆層(22)の外表面にカルボキシメチルキトサンの水溶液(濃度0.5質量%)を塗布して乾燥させることによって固形分付着量が1.0mg/m2のキトサン層(24)を形成せしめて負極タブリード(2)を得た(図5参照)。
表面粗さRaが0.1μmのニッケル被覆層(22)を形成せしめた以外は、実施例10と同様にして負極タブリード(2)を得た(図5参照)。
厚さ500μmの銅板(21)の全面に電気メッキ法により表面粗さRaが0.1μmで厚さ3μmのニッケル被覆層(22)を形成せしめ、さらに該ニッケルメッキ被覆層(22)の先端部の両側に電気メッキ法により片面3μmの錫の部分コーティング層(部分メッキ層)(23)を形成せしめ、さらにこれらの表面の全面に、カルボキシメチルキトサンの水溶液(濃度0.5質量%)を塗布して乾燥させることによって固形分付着量が1.0mg/m2のキトサン層(24)を形成せしめて負極タブリード(2)を得た(図7参照)。
厚さ500μmの銅板(21)の全面に電気メッキ法により表面粗さRaが0.1μmで厚さ3μmのニッケル被覆層(22)を形成せしめ、さらに該ニッケルメッキ被覆層(22)の先端部の両側に電気メッキ法により片面3μmのハンダの部分コーティング層(部分メッキ層)(23)を形成せしめ、さらにこれらの表面の全面に、カルボキシメチルキトサンの水溶液(濃度0.5質量%)を塗布して乾燥させることによって固形分付着量が1.0mg/m2のキトサン層(24)を形成せしめて負極タブリード(2)を得た(図7参照)。
図5、7に示すように、負極タブリード(2)の長さ方向の中間部領域の両側にポリプロピレン樹脂からなる絶縁タブフィルム(25)(25)を熱溶着せしめ、更にこの絶縁タブフィルム(25)(25)を挟み込む態様で、内面側に非延伸ポリプロピレン層を有する外装体(31)の縁部をヒートシールで封止接合した。なお、封止直前に外装体(31)の内部に電解液(濃度1MのLiPF6)を封入せしめた。これを85℃のオーブン内に30日間入れて耐久性試験を行った。各実施例毎にサンプルを1000個用意し、これら1000個について耐久性試験を行って負極タブ部からの電解液漏れ発生(不良発生)のあったサンプル数を数えた。
表面粗さRaが0.1μmで厚さ500μmのアルミニウム板(11)の先端部の両側(両面)に電気メッキ法により片面3μmのニッケルの部分コーティング層(部分メッキ層)(13)を形成せしめ、さらにこれらの表面の全面に、カルボキシメチルキトサンの水溶液(濃度0.5質量%)を塗布して乾燥させることによって固形分付着量が50mg/m2のキトサン層(14)を形成せしめて正極タブリード(1)を得た(図8参照)。
次に、前記正極タブリード(1)の長さ方向の中間部領域の両側に、前記部分コーティング層(13)が形成されている領域にかかる態様で、ポリプロピレン樹脂からなる絶縁タブフィルム(15)(15)を熱溶着せしめた(図8参照)。即ち、アルミニウム板(11)における外装体(31)の外部に露出される領域の全部(側端面11aを除く)に、ニッケルの部分コーティング層(部分メッキ層)(13)が形成されてなる正極タブリード(1)を得た(図8参照)。
図8に示すように、絶縁タブフィルム(15)(15)を挟み込む態様で、内面側に非延伸ポリプロピレン層を有する外装体(31)の縁部をヒートシールで封止接合した。なお、封止直前に外装体(31)の内部に電解液(濃度1MのLiPF6)を封入せしめた。これを85℃のオーブン内に30日間入れて耐久性試験を行った。各実施例毎にサンプルを1000個用意し、これら1000個について耐久性試験を行って正極タブ部からの電解液漏れ発生(不良発生)のあったサンプル数を数えた。
表面粗さRaが0.1μmで厚さ500μmのアルミニウム板(11)の先端部の両側(両面)に電気メッキ法により片面3μmのニッケルの部分コーティング層(部分メッキ層)(13)を形成せしめ、さらにこれらの表面の全面に、カルボキシメチルキトサンの水溶液(濃度0.5質量%)を塗布して乾燥させることによって固形分付着量が50mg/m2のキトサン層(14)を形成せしめて正極タブリード(1)を得た(図8参照)。
次に、前記正極タブリード(1)の長さ方向の中間部領域の両側に、前記部分コーティング層(13)が形成されている領域にかかる態様で、ポリプロピレン樹脂からなる絶縁タブフィルム(15)(15)を熱溶着せしめた(図8参照)。即ち、アルミニウム板(11)における外装体(31)の外部に露出される領域の全部(但し、側端面を除く)に、ニッケルの部分コーティング層(部分メッキ層)(13)が形成されてなる正極タブリード(1)を得た(図8参照)。
表面粗さRaが0.1μmで厚さ500μmのアルミニウム板(11)の先端部の両側に電気メッキ法により片面3μmのニッケルの部分コーティング層(部分メッキ層)(13)を形成せしめ、さらにこれらの表面の全面に、カルボキシメチルキトサンの水溶液(濃度0.5質量%)を塗布して乾燥させることによって固形分付着量が50mg/m2のキトサン層(14)を形成せしめて正極タブリード(1)を得た(図3参照)。
表面粗さRaが0.1μmで厚さ500μmのアルミニウム板(11)の先端部の両側に電気メッキ法により片面3μmの錫の部分コーティング層(部分メッキ層)(13)を形成せしめ、さらにこれらの表面の全面に、カルボキシメチルキトサンの水溶液(濃度0.5質量%)を塗布して乾燥させることによって固形分付着量が50mg/m2のキトサン層(14)を形成せしめて正極タブリード(1)を得た(図3参照)。
表面粗さRaが0.1μmで厚さ500μmのアルミニウム板(11)の先端部の両側に電気メッキ法により片面3μmのハンダの部分コーティング層(部分メッキ層)(13)を形成せしめ、さらにこれらの表面の全面に、カルボキシメチルキトサンの水溶液(濃度0.5質量%)を塗布して乾燥させることによって固形分付着量が50mg/m2のキトサン層(14)を形成せしめて正極タブリード(1)を得た(図3参照)。
相互に接合された正極タブリードと負極タブリードを塩水噴霧試験機内(温度:35℃)にセットし、この状態で500時間運転した後、これらを取り出して腐食の程度を目視により観察し、下記判定基準に基づいて耐食性を評価した。
(判定基準)
「◎」…アルミニウム板の腐食の痕跡が認められず、耐食性に優れている
「○」…アルミニウム板の腐食の痕跡が僅かに認められたものの、概ね良好な状態であって、耐食性が良好である
「×」…アルミニウム板が局部電池の作用で著しく腐食しており耐食性に劣っている。
2…負極タブリード
11…アルミニウム板
13…部分コーティング層
14…キトサン層
21…銅板
22…ニッケル被覆層
23…部分コーティング層
24…キトサン層
30…電池
31…外装体
32…電池本体部
33…正極
34…負極
35…電解質
Claims (14)
- アルミニウム板における外装体の外部に露出される領域の少なくとも一部に、ニッケル、錫またはハンダからなる部分コーティング層が形成されていることを特徴とする正極タブリード。
- 前記アルミニウム板の表面粗さRaが0.03~0.5μmである請求項1に記載の正極タブリード。
- 前記アルミニウム板における前記部分コーティング層が形成されていない領域の表面粗さRaが0.03~0.5μmである請求項1に記載の正極タブリード。
- 前記アルミニウム板における外装体の外部に露出される領域の全部に前記部分コーティング層が形成されている請求項1~3のいずれか1項に記載の正極タブリード。
- さらに表面に、キトサン及びキトサン誘導体からなる群より選ばれる1種または2種以上の化合物を含有してなるキトサン層が形成されていることを特徴とする請求項1~4のいずれか1項に記載の正極タブリード。
- 銅板の全面にニッケル被覆層が形成されていることを特徴とする負極タブリード。
- 銅板の全面にニッケル被覆層が形成され、該ニッケル被覆層の外表面における外装体の外部に露出される領域の少なくとも一部に、錫またはハンダからなる部分コーティング層が形成されていることを特徴とする負極タブリード。
- 前記ニッケル被覆層の表面粗さRaが0.03~0.5μmである請求項6または7に記載の負極タブリード。
- さらに表面に、キトサン及びキトサン誘導体からなる群より選ばれる1種または2種以上の化合物を含有してなるキトサン層が形成されていることを特徴とする請求項6~8のいずれか1項に記載の負極タブリード。
- 正極、負極及び電解質を含んでなる電池本体部と、該電池本体部を内部に封入した外装体と、前記正極と電気的に接続された正極タブリードと、前記負極と電気的に接続された負極タブリードとを備え、前記正極タブリードの一部が前記外装体の外部に露出され、前記負極タブリードの一部が前記外装体の外部に露出されてなる電池において、
前記正極タブリードは、アルミニウム板における前記露出領域の少なくとも一部に、ニッケル、錫またはハンダからなる部分コーティング層が形成されたものからなり、
前記負極タブリードは、銅板の全面にニッケル被覆層が形成されたものからなることを特徴とする電池。 - 正極、負極及び電解質を含んでなる電池本体部と、該電池本体部を内部に封入した外装体と、前記正極と電気的に接続された正極タブリードと、前記負極と電気的に接続された負極タブリードとを備え、前記正極タブリードの一部が前記外装体の外部に露出され、前記負極タブリードの一部が前記外装体の外部に露出されてなる電池において、
前記正極タブリードは、アルミニウム板における前記露出領域の少なくとも一部に、ニッケルからなる部分コーティング層が形成されたものからなり、
前記負極タブリードは、銅板の全面にニッケル被覆層が形成されたものからなることを特徴とする電池。 - 正極、負極及び電解質を含んでなる電池本体部と、該電池本体部を内部に封入した外装体と、前記正極と電気的に接続された正極タブリードと、前記負極と電気的に接続された負極タブリードとを備え、前記正極タブリードの一部が前記外装体の外部に露出され、前記負極タブリードの一部が前記外装体の外部に露出されてなる電池において、
前記正極タブリードは、アルミニウム板における前記露出領域の少なくとも一部に、錫からなる部分コーティング層が形成されたものからなり、
前記負極タブリードは、銅板の全面にニッケル被覆層が形成されると共にこのニッケル被覆層における前記露出領域の少なくとも一部に錫からなる部分コーティング層が形成されたものからなることを特徴とする電池。 - 正極、負極及び電解質を含んでなる電池本体部と、該電池本体部を内部に封入した外装体と、前記正極と電気的に接続された正極タブリードと、前記負極と電気的に接続された負極タブリードとを備え、前記正極タブリードの一部が前記外装体の外部に露出され、前記負極タブリードの一部が前記外装体の外部に露出されてなる電池において、
前記正極タブリードは、アルミニウム板における前記露出領域の少なくとも一部に、ハンダからなる部分コーティング層が形成されたものからなり、
前記負極タブリードは、銅板の全面にニッケル被覆層が形成されると共にこのニッケル被覆層における前記露出領域の少なくとも一部にハンダからなる部分コーティング層が形成されたものからなることを特徴とする電池。 - 前記正極タブリードのアルミニウム板における前記露出領域の全部に前記部分コーティング層が形成されている請求項10~13のいずれか1項に記載の電池。
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- 2009-11-06 US US13/141,141 patent/US9070919B2/en active Active
- 2009-11-06 KR KR1020127033896A patent/KR20130004606A/ko not_active Application Discontinuation
- 2009-11-06 EP EP09834631.5A patent/EP2372815A4/en not_active Withdrawn
- 2009-11-06 CN CN200980157136.0A patent/CN102326280B/zh active Active
- 2009-11-06 KR KR1020117011538A patent/KR20110082177A/ko not_active Application Discontinuation
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2423996B1 (en) * | 2010-08-30 | 2020-02-26 | Samsung SDI Co., Ltd. | Secondary battery |
EP2602845A4 (en) * | 2010-09-27 | 2016-03-23 | Lg Chemical Ltd | ELECTRODE ROD COMPRISING A CORROSION PROTECTION LAYER, AND RECHARGEABLE BATTERY COMPRISING SAID ELECTRODE ROD |
WO2012076327A1 (de) * | 2010-12-10 | 2012-06-14 | Sb Limotive Company Ltd. | Ableiterfolie für eine lithium-ionen-zelle, lithium-ionen-akkumulator sowie kraftfahrzeug mit einem lithium-ionen-akkumulator |
WO2012076328A1 (de) * | 2010-12-10 | 2012-06-14 | Sb Limotive Company Ltd. | Kollektor für eine lithium-ionen-zelle, lithium-ionen-akkumulator sowie kraftfahrzeug mit einem lithium-ionen-akkumulator |
EP2602846A2 (en) * | 2011-06-30 | 2013-06-12 | LG Chem, Ltd. | Electrode terminal for secondary battery and lithium secondary battery comprising same |
EP2602846A4 (en) * | 2011-06-30 | 2014-12-17 | Lg Chemical Ltd | ELECTRODE TERMINAL FOR SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY COMPRISING SUCH AN ASSEMBLY |
JP2016162482A (ja) * | 2015-02-26 | 2016-09-05 | 株式会社フジクラ | 蓄電デバイス及び蓄電モジュール |
EP3703159A4 (en) * | 2017-10-26 | 2021-08-11 | LG Electronics Inc. | CONNECTION TAB AND POCKET-TYPE BATTERY INCLUDING IT |
Also Published As
Publication number | Publication date |
---|---|
US20110305945A1 (en) | 2011-12-15 |
KR20130004606A (ko) | 2013-01-11 |
JP5684462B2 (ja) | 2015-03-11 |
CN102326280B (zh) | 2015-01-28 |
US9070919B2 (en) | 2015-06-30 |
EP2372815A4 (en) | 2014-05-07 |
CN102326280A (zh) | 2012-01-18 |
KR20110082177A (ko) | 2011-07-18 |
JP2010170979A (ja) | 2010-08-05 |
EP2372815A1 (en) | 2011-10-05 |
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