CN110419120B - Lead wire for nonaqueous electrolyte battery and nonaqueous electrolyte battery provided with same - Google Patents
Lead wire for nonaqueous electrolyte battery and nonaqueous electrolyte battery provided with same Download PDFInfo
- Publication number
- CN110419120B CN110419120B CN201880015896.7A CN201880015896A CN110419120B CN 110419120 B CN110419120 B CN 110419120B CN 201880015896 A CN201880015896 A CN 201880015896A CN 110419120 B CN110419120 B CN 110419120B
- Authority
- CN
- China
- Prior art keywords
- nonaqueous electrolyte
- lead
- electrolyte battery
- insulating layer
- polypropylene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
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
- 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
- H01M50/10—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
- H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
-
- 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
-
- 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
- H01M50/183—Sealing members
-
- 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
-
- 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
-
- 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
-
- 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
- H01M50/557—Plate-shaped terminals
-
- 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
-
- 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
- H01M50/572—Means for preventing undesired use or discharge
-
- 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
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
-
- 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
Abstract
A lead for a nonaqueous electrolyte battery, having: the lead wire comprises a lead wire conductor, a first insulating layer directly covering at least one part of the lead wire conductor, and a second insulating layer covering the first insulating layer, wherein the second insulating layer is a cross-linked body of a resin composition, and the resin composition comprises an olefin crystalline-ethylene octene-olefin crystalline block polymer and polypropylene in a mass ratio of 10:90 to 40: 60.
Description
Technical Field
The present disclosure relates to a lead for a nonaqueous electrolyte battery, and a nonaqueous electrolyte battery including the lead. The present application claims priority based on japanese application No. 2017-235005 filed on 12/7/2017 and cites the entire contents of the description described in the above japanese application.
Background
With the miniaturization and weight reduction of electronic devices, electronic components such as batteries and capacitors used in these devices are also required to be miniaturized and reduced in weight. Therefore, for example, a nonaqueous electrolyte battery is used which is obtained by using a bag as a package container and sealing a nonaqueous electrolyte (electrolytic solution), a positive electrode, and a negative electrode in the package container. As the non-aqueous electrolyte, LiPF was used6、LiBF4And an electrolyte solution obtained by dissolving a fluorine-containing lithium salt in propylene carbonate, ethylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, or the like.
The packaging container is required to have properties of preventing permeation of an electrolyte or gas and preventing permeation of moisture from the outside. Therefore, a laminate film in which a metal layer such as an aluminum foil is coated with a resin is used as a material of the package, and the end portions of the 2-layer laminate film are heat-welded to form the package.
One end of the package container is an opening, and the nonaqueous electrolyte, the positive electrode plate, the negative electrode plate, the separator, and the like are sealed inside the package container. A lead conductor is further disposed so as to extend from the inside to the outside of the package container, one end of the lead conductor is connected to the positive electrode plate and the negative electrode plate, and finally the opening portion is heat-sealed (heat-welded) to close the opening portion of the package container, and the package container and the lead conductor are bonded to seal the opening portion. The finally heat-welded portion is referred to as a sealing portion.
A portion of the lead conductor corresponding to the sealing portion is covered with an insulating layer, and a material provided with the insulating layer and the lead conductor is referred to as a lead for a nonaqueous electrolyte battery. The package and the lead conductor are bonded (heat-welded) with the insulating layer interposed therebetween. Therefore, the insulating layer needs to have such characteristics: the adhesion between the lead conductor and the package can be maintained without short-circuiting the metal layer of the package and the lead conductor.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2001 and 102016
Patent document 2: japanese patent laid-open publication No. 2011-
Disclosure of Invention
A lead according to one embodiment of the present disclosure is a lead for a nonaqueous electrolyte battery having a lead conductor, a first insulating layer directly covering at least a part of the lead conductor, and a second insulating layer covering the first insulating layer, wherein the second insulating layer is a crosslinked body of a resin composition containing an olefin crystalline-ethylene octene-olefin crystalline block polymer and polypropylene in a mass ratio of 10:90 to 40: 60.
A nonaqueous electrolyte battery according to another embodiment of the present disclosure is a nonaqueous electrolyte battery provided with the above-described lead for a nonaqueous electrolyte battery.
Brief description of the drawings
Fig. 1 is a front view of a nonaqueous electrolyte battery according to one embodiment of the present disclosure.
Fig. 2 is a partial sectional view of a nonaqueous electrolyte battery according to an embodiment of the present disclosure.
Fig. 3 is a partial sectional view of a lead according to one embodiment of the present disclosure.
Detailed Description
[ problems to be solved by the present disclosure ]
As described in patent documents 1 and 2, in the lead used for the nonaqueous electrolyte battery, the metal layer of the package container and the lead conductor can be prevented from being short-circuited at the time of thermal welding by using the crosslinked layer in a part of the insulating layer. As the crosslinked layer, a crosslinked material of polypropylene is generally used.
Since polypropylene is a material that is more difficult to crosslink than polyethylene, it is used in admixture with a crosslinking aid as described in patent document 2. Specifically, a mixture of polypropylene and a crosslinking assistant is formed into a sheet shape, and then crosslinked by irradiation of an electron beam or the like. The crosslinking assistant has a low molecular weight and therefore has a low melting point, and may volatilize due to heat during molding. The evaporated vapors of the crosslinking aid are cooled at other positions of the forming device and adhere to the forming device or the product, which may adversely affect the product. Although such a situation does not occur in the case of reducing the amount of the crosslinking aid, reducing the amount of the crosslinking aid causes crosslinking of polypropylene to become insufficient, and when the lead is thermally welded to the package container in manufacturing the nonaqueous electrolyte battery, the metal layer of the package container and the lead conductor may be short-circuited.
Accordingly, an object of the present disclosure is to provide a lead for a nonaqueous electrolyte battery, which can be manufactured without adversely affecting molding equipment or products and can maintain adhesion between a lead conductor and a package container without short-circuiting a metal layer of the package container and the lead conductor, and a nonaqueous electrolyte battery including the lead.
[ Effect of the present disclosure ]
According to the present invention, it is possible to provide a lead wire for a nonaqueous electrolyte battery which can be manufactured without adversely affecting molding equipment or products and can maintain adhesion between a lead conductor and a package container without short-circuiting a metal layer of the package container and the lead conductor, and a nonaqueous electrolyte battery provided with the lead wire.
[ description of embodiments of the invention ]
A lead for a nonaqueous electrolyte battery according to an embodiment of the present disclosure is a lead for a nonaqueous electrolyte battery having a lead conductor, a first insulating layer directly covering at least a part of the lead conductor, and a second insulating layer covering the first insulating layer, wherein the second insulating layer is a crosslinked body of a resin composition containing an olefin crystalline-ethylene octene-olefin crystalline block polymer and polypropylene in a mass ratio of 10:90 to 40: 60. According to this embodiment, manufacturing can be performed without adversely affecting molding equipment or products, and the adhesion of the lead conductors to the package container can be maintained without causing a short circuit between the metal layer of the package container and the lead conductors.
In other embodiments of the present disclosure, the difference between the melting point of the olefin crystalline-ethylene octene-olefin crystalline block polymer and the melting point of the polypropylene is 50 ℃ or less. According to this embodiment, the film-forming property is improved by increasing the compatibility between resins.
In other embodiments of the present disclosure, the first insulating layer comprises an acid-modified polyolefin. According to this embodiment, the adhesion between the first insulating layer and the metal is improved.
In other embodiments of the present disclosure, the polypropylene is a random polypropylene or an acid-modified polypropylene. According to this embodiment, the olefin crystalline-ethylene octene-olefin crystalline block polymer is excellent in compatibility with the polypropylene.
In another embodiment of the present disclosure, a total thickness of the first insulating layer and the second insulating layer is 30 μm to 200 μm.
In other embodiments of the present disclosure, the acid-modified polyolefin is a maleic anhydride-modified polyolefin. According to this embodiment, the adhesion between the first insulating layer and the metal is improved.
In other embodiments of the present disclosure, the first insulating layer comprises a maleic anhydride modified polyolefin, and the polypropylene is a random polypropylene or an acid modified polypropylene. According to this embodiment, the adhesion between the first insulating layer and the metal is improved, and the compatibility between the olefin crystalline-ethylene octene-olefin crystalline block polymer and the polypropylene is excellent.
Another embodiment of the present disclosure is a nonaqueous electrolyte battery including the lead for a nonaqueous electrolyte battery. According to this embodiment, the lead can be manufactured without adversely affecting the molding equipment or the product, and the adhesion of the lead conductor to the package container can be maintained without causing a short circuit between the metal layer of the package container and the lead conductor.
[ detailed description of embodiments of the present disclosure ]
Fig. 1 is a front view schematically showing one embodiment of a nonaqueous electrolyte battery, and fig. 2 is a partial sectional view of a portion a-a' of fig. 1. The nonaqueous electrolyte battery 1 has a substantially rectangular package container 2, and a lead conductor 3 extending from the inside to the outside of the package container 2. The lead conductor 3 and the package container 2 are connected to each other at the sealing portion 9 via the first insulating layer 4b and the second insulating layer 4 a.
As shown in fig. 2, the package 2 is composed of a 3-layer laminated film 8, and the laminated film 8 is composed of a metal layer 5, a resin layer 6 covering the metal layer 5, and a resin layer 7. The metal layer 5 is made of metal such as aluminum foil. As the resin layer 6 located outside the package container, polyamide resin such as 6, 6-nylon and 6-nylon, polyester resin, polyimide resin, or the like can be used. The resin layer 7 located inside the outer container 2 is insoluble in the nonaqueous electrolyte, and an insulating resin that melts when heated is also preferably used for the resin layer 7, and examples thereof include polyolefin resins, acid-modified polyolefin resins, and acid-modified styrene elastomers. The package 2 is manufactured as follows: the 2-sheet laminated film 8 was overlapped, and heat-sealed for 3 sides except for the side through which the lead conductor penetrated. In the outer peripheral portion of the package container, 2 metal layers 5 are bonded via a resin layer 7.
At the sealing portion 9, the lead conductor 3 is bonded (heat-welded) to the package container (the laminate film 8) via the first insulating layer 4b and the second insulating layer 4 a. Inside the nonaqueous electrolyte battery, further packaged are: a positive electrode collector 10 and a negative electrode collector 11 connected to the end portions of the lead conductor 3, a nonaqueous electrolyte 13, and a separator 12.
Fig. 3 is a schematic cross-sectional view of a lead. The surface of the plate-like lead conductor 3 is covered with a first insulating layer 4b, and the outside of the first insulating layer 4b is further covered with a second insulating layer 4 a. An insulating layer may be further provided outside the second insulating layer 4 a. The insulating layer 4a and the insulating layer 4b are melted by heat at the time of heat sealing and bonded to the package and the lead conductor. The lead is also referred to as a tab (タブリード).
As the first insulating layer 4b, a resin that can be melted by heat at the time of heat sealing and has adhesiveness to a metal (lead conductor) and an olefin resin (second insulating layer 4a) can be used. As the resin having good adhesiveness to the olefin-based resin, polyethylene, polypropylene, an ethylene-based elastomer, a styrene-based elastomer, an ionomer resin, or the like can be used. Further, it is preferable that these resins are acid-modified because the adhesiveness to a metal is improved. For example, polyethylene, polypropylene, ethylene-based elastomer, propylene-based elastomer, styrene-based elastomer, ionomer resin, etc., which are modified with maleic acid, acrylic acid, methacrylic acid, maleic anhydride, epoxy group, can be used, and maleic anhydride-modified polyolefin is particularly preferably used.
The second insulating layer 4a uses a crosslinked body of a resin composition containing an olefin crystalline-ethylene octene-olefin crystalline block polymer and polypropylene in a mass ratio of 10:90 to 40: 60. The olefin crystalline-ethylene octene-olefin crystalline block polymer is excellent in compatibility with polypropylene and also excellent in crosslinkability. Therefore, the resin composition constituting the second insulating layer 4a can be crosslinked even if the amount of the crosslinking assistant is reduced, and can be produced without adversely affecting molding equipment or products when the resin composition is processed into a sheet shape. As the olefin crystalline portion, a crystalline polyethylene copolymer is preferably used. As the polypropylene, random polypropylene, block polypropylene, acid-modified polypropylene, epoxy-modified polypropylene, or the like can be used.
The second insulating layer 4a is crosslinked by irradiation with ionizing radiation such as accelerated electron beams or γ rays. The crosslinking improves heat resistance, and thus, a decrease in adhesion when the temperature rises during use and a short circuit between the lead conductor and the metal layer can be prevented.
The mass ratio of the olefin crystalline-ethylene octene-olefin crystalline block polymer (CEOC) to polypropylene is preferably 10:90 to 40: 60. If the amount of polypropylene is more than this range, the crosslinking property is deteriorated, and the lead and the metal layer may be short-circuited by melting at the time of thermal welding. If the amount of polypropylene is less than this range, the amount of soft and highly viscous CEOC increases relatively, and therefore the insulating layer 4a may adsorb dirt such as dust.
The difference between the melting point of the olefin crystalline-ethylene octene-olefin crystalline block polymer (CEOC) and the melting point of polypropylene is preferably 50 ℃ or less. More preferably 40 ℃ or lower, and still more preferably 25 ℃ or lower. When the difference between the melting points is small, the compatibility between the resins is improved, so that the film-forming property becomes good. In addition, since the olefin crystalline-ethylene octene-olefin crystalline block polymer (CEOC) having a high melting point is more easily crosslinked than that having a low melting point, the heat resistance of the insulating layer can be improved.
The crosslinking assistant may be mixed in the resin composition constituting the second insulating layer 4a within a range not to impair the gist of the present disclosure. The crosslinking assistant is composed of a compound containing at least 2 unsaturated groups in the molecule. As the crosslinking assistant, triallyl isocyanurate (TAIC (registered trademark)), trimethylolpropane trimethacrylate, tris (2-acryloyloxyethyl) isocyanurate, or the like can be used. The amount of the crosslinking assistant is preferably 4 parts by mass or less, more preferably 2 parts by mass or less, relative to 100 parts by mass of the resin component.
In addition to these resins, various additives such as a flame retardant, an ultraviolet absorber, a light stabilizer, a heat stabilizer, a lubricant, and a colorant may be mixed in the first insulating layer and the second insulating layer. These resin materials and additives are mixed by using a known mixing device such as an open roll, a pressure kneader, a single screw mixer, or a twin screw mixer, and then subjected to extrusion molding or the like to prepare a film-shaped insulating layer. The thicknesses of the first insulating layer and the second insulating layer depend on the thickness of the lead conductor, and their total thickness is preferably 30 μm to 200 μm.
As the lead conductor 3, a metal such as aluminum, an aluminum alloy, nickel, a nickel alloy, copper, a copper alloy, or nickel-plated copper is used. In the case of lithium ion batteries, aluminum is often used for the positive electrode, and nickel or nickel-plated copper is often used for the negative electrode. The shape of the lead conductor is not particularly limited, and a flat plate-shaped metal having a thickness of 50 μm to 2mm, a width of 1mm to 200mm, and a length of 5mm to 200mm can be preferably used.
Examples
Hereinafter, the present disclosure will be described in further detail based on examples. The examples do not limit the scope of the invention.
(Experimental examples 1 to 18)
[ production of resin composition for Forming insulating layer ]
The following shows compounds used for preparing the resin composition for forming an insulating layer.
(resin component)
Random PP (PP: Polypropylene): ノバテック (registered trademark) FX4G (melting point 130 ℃, MFR5g/10 min)
Acid modified random PP mixture: アドマー (registered trademark) QF551 (melting point 135 ℃, MFR 6g/10 min)
Crystalline olefin-crystalline ethylene butene-olefin block Polymer (CEBC) (melting Point 95 ℃ C.)
Olefin Crystal-ethylene octene-olefin Crystal Block Polymer (CEOC)1 (melting Point 122 ℃ C.)
Olefin Crystal-ethylene octene-olefin Crystal Block Polymer (CEOC)2 (melting Point 118 ℃ C.)
Ethylene butene copolymer 1: タフマー (registered trademark) DF640 (melting point 55 ℃, MFR 6g/10 min)
Ethylene butene copolymer 2: タフマー (registered trademark) DF610 (melting point 55 ℃, MFR 3g/10 min)
Ethylene propylene copolymer: タフマー (registered trademark) P280 (melting point 55 ℃, MFR5g/10 min)
Ethylene octene copolymer: エンゲージ (registered trademark) 8150 (melting point 55 ℃, MFR 1g/10 min)
(crosslinking assistant)
Crosslinking assistant 1: triallylisocyanurate
And (3) crosslinking assistant 2: trimethylolpropane trimethacrylate
(antioxidant)
Antioxidant 1: イルガノックス (registered trademark) 1076
[ formation of insulating layer and evaluation of film Forming Property ]
The above materials were mixed in the proportions shown in tables 1 and 2 to obtain a resin composition for forming an insulating layer. The obtained resin composition was molded into a sheet shape by a T-die method. An insulating layer having a thickness of 0.05mm was formed by a nip roll method with the die thickness of the T die set to 0.05mm and the air gap between the die and the cooling roll set to 50 mm. The film forming speed was gradually increased, and the film forming speed at which a sheet could be produced satisfactorily was measured. The film forming speed was 20 m/min or more as a qualified value. The room temperature during film formation was 10 ℃, and the amount of vapor generated from the crosslinking assistant during film formation was visually observed.
[ Cross-linking by irradiation with Gamma ray ]
The resulting insulating layer was crosslinked by irradiation with 120kGy of gamma rays.
[ bleeding characteristics (time required until bleeding reaches a certain amount) ]
The crosslinked insulating layer sheet was cut into a standard size and stored at room temperature for a certain period of time. The amount of crosslinking assistant which exudes to the surface of the sheet was determined by ATR-IR (Attenuated Total reflection-Infrared Spectroscopy). Specifically, the peak at the characteristic of the crosslinking assistant (1700 cm)-1) (ii) measurement of the peak height in the direct measurement of the filmA%), and the peak height (B%) measured after wiping the film surface with ethanol, the time required until a-B became 4% was determined. The product was judged to be acceptable when the number of weeks or more was 4 weeks. The experimental examples without crosslinking coagent are indicated as "none" in the table.
[ evaluation of Heat distortion residue Rate ]
The thermal deformation residue rate of the insulating layer sheet after crosslinking was evaluated. Specifically, the sheet sample was placed in a TMA (Thermal Mechanical Analysis) apparatus, the temperature was raised in a state where a load of 0.1MPa was applied to the probe, and the thickness at room temperature and the thickness at 200 ℃ were measured. The ratio of the thickness at 200 ℃ to the thickness at room temperature was defined as the heat distortion residual ratio (%). And (4) determining that more than 40% of the cases are qualified.
The results are shown in tables 1 and 2.
[ Table 1]
[ Table 2]
Examples 1 to 8 are sheets obtained by mixing an olefin crystalline-ethylene octene-olefin crystalline block polymer (CEOC) with a polypropylene resin or an acid-modified polypropylene resin and crosslinking it by gamma ray irradiation. In examples 1 to 5 and examples 7 and 8, although no crosslinking aid was added, the heat distortion residue rate as an index of the crosslinkability was 40% or more, and it was found that the crosslinking was favorably performed. In addition, in experimental example 6, 1 part of the crosslinking assistant was mixed with 100 parts by mass of the resin component, but the generation of the vapor of the crosslinking assistant during film formation was small, and the bleeding property of the crosslinking assistant also exceeded 4 weeks, which is a qualified value. In addition, all sheets can be formed at a speed of 20 m/min or more, and productivity is also good.
In experimental example 9, instead of the crystalline olefin-ethyleneoctene-olefin block polymer (CEOC), crystalline olefin-ethylenebutene-olefin block polymer (CEBC) was used. The generation of vapor of the crosslinking assistant during film formation was small, and the bleeding of the crosslinking assistant was acceptable, but the upper limit of the film formation rate was 15 m/min, and the film formation rate was inferior to those of examples 1 to 8. This is considered to be because the difference between the melting point of CEBC as low as 95 ℃ and the melting point of polypropylene resin (130 ℃) is large. In addition, compared with the same mixing ratio of experimental example 2, as a crosslinking index of heat distortion residual rate is low. From this, it is presumed that CEOC is easier to crosslink than CEBC.
Experimental examples 10 to 12 are sheets obtained by mixing a crosslinking aid into a polypropylene resin or an acid-modified polypropylene resin and crosslinking the same, without using an olefin crystalline-ethylene octene-olefin crystalline block polymer (CEOC). Although the heat distortion residue rate is 95%, the generation of steam of the crosslinking assistant during molding is large and the bleeding of the crosslinking assistant is also large.
In experimental example 13, a polypropylene resin monomer was used. The heat distortion residue rate was lower than that of the other examples, and it is estimated that the crosslinking reaction did not sufficiently occur. In experimental example 14, 1 part of a crosslinking assistant was mixed with 100 parts by mass of a polypropylene resin. Although the generation of the crosslinking assistant vapor was small and the rate of the heat distortion residue was also good, the film forming speed was slightly slow with an upper limit of 15 m/min.
Experimental examples 15 to 18 are sheets obtained by mixing a resin other than the olefin crystalline-ethylenebutylene-olefin crystalline block polymer (CEBC) with a polypropylene resin and crosslinking the mixture by gamma-ray irradiation. The rate of thermal deformation residue exceeds the acceptable value, and therefore, it is presumed that the crosslinking reaction occurs, but the film forming rate is slow and the workability is poor.
The presently disclosed embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is not limited to the constitution of the above-described embodiments, but is indicated by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.
[ description of symbols ]
1 nonaqueous electrolyte battery
2 packaging container
3 lead conductor
4a second insulating layer
4b first insulating layer
5 Metal layer
6 resin layer
7 resin layer
8-laminated film
9 sealing part
10 positive electrode current collector
11 negative electrode current collector
12 baffle plate
13 a non-aqueous electrolyte.
Claims (13)
1. A lead for a nonaqueous electrolyte battery, having: a lead conductor, a first insulating layer directly covering at least a portion of the lead conductor, and a second insulating layer covering the first insulating layer,
the second insulating layer is a crosslinked body of a resin composition containing an olefin crystalline-ethylene octene-olefin crystalline block polymer and polypropylene in a mass ratio of 10:90 to 40: 60.
2. The lead for a nonaqueous electrolyte battery according to claim 1, wherein a difference between a melting point of the olefin crystalline-ethylene octene-olefin crystalline block polymer and a melting point of the polypropylene is 50 ℃ or less.
3. The lead for a nonaqueous electrolyte battery according to claim 1, wherein a difference between a melting point of the olefin crystalline-ethylene octene-olefin crystalline block polymer and a melting point of the polypropylene is 40 ℃ or less.
4. The lead for a nonaqueous electrolyte battery according to claim 1, wherein a difference between a melting point of the olefin crystalline-ethylene octene-olefin crystalline block polymer and a melting point of the polypropylene is 25 ℃ or less.
5. The lead for a nonaqueous electrolyte battery according to any one of claims 1 to 4, wherein the first insulating layer contains an acid-modified polyolefin.
6. The lead for a nonaqueous electrolyte battery according to any one of claims 1 to 4, wherein the polypropylene is a random polypropylene or an acid-modified polypropylene.
7. The lead for a nonaqueous electrolyte battery according to any one of claims 1 to 4, wherein a total thickness of the first insulating layer and the second insulating layer is 30 μm or more and 200 μm or less.
8. The lead for a nonaqueous electrolyte battery according to claim 5, wherein the acid-modified polyolefin is a maleic anhydride-modified polyolefin.
9. The lead for a nonaqueous electrolyte battery according to claim 1, wherein the first insulating layer contains a maleic anhydride-modified polyolefin,
the polypropylene is random polypropylene or acid modified polypropylene.
10. The lead for a nonaqueous electrolyte battery according to any one of claims 1 to 4, wherein the olefin crystal is a crystalline polyethylene copolymer.
11. The lead for a nonaqueous electrolyte battery according to any one of claims 1 to 4,
the second insulating layer contains a crosslinking assistant,
the amount of the crosslinking assistant is 4 parts by mass or less with respect to 100 parts by mass of the resin component of the second insulating layer.
12. The lead for a nonaqueous electrolyte battery according to claim 11,
the crosslinking assistant is at least 1 or more selected from the group consisting of triallyl isocyanurate, trimethylolpropane trimethacrylate, and tris (2-acryloyloxyethyl) isocyanurate.
13. A nonaqueous electrolyte battery provided with the lead for a nonaqueous electrolyte battery according to any one of claims 1 to 12.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017235005 | 2017-12-07 | ||
| JP2017-235005 | 2017-12-07 | ||
| PCT/JP2018/040301 WO2019111592A1 (en) | 2017-12-07 | 2018-10-30 | Lead wire for non-aqueous electrolyte battery and non-aqueous electrolyte battery provided with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110419120A CN110419120A (en) | 2019-11-05 |
| CN110419120B true CN110419120B (en) | 2021-11-16 |
Family
ID=66751457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880015896.7A Active CN110419120B (en) | 2017-12-07 | 2018-10-30 | Lead wire for nonaqueous electrolyte battery and nonaqueous electrolyte battery provided with same |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7104269B2 (en) |
| KR (1) | KR102227239B1 (en) |
| CN (1) | CN110419120B (en) |
| WO (1) | WO2019111592A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021153777A1 (en) * | 2020-01-31 | 2021-08-05 | 住友電気工業株式会社 | Tab lead for batteries |
| WO2022049712A1 (en) * | 2020-09-03 | 2022-03-10 | 住友電気工業株式会社 | Lead wire for nonaqueous electrolyte batteries, nonaqueous electrolyte battery, and method for producing lead wire for nonaqueous electrolyte batteries |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1189924A (en) * | 1996-04-23 | 1998-08-05 | 住友电气工业株式会社 | Non-aqueous electrolyte cell |
| CN1324889A (en) * | 2000-05-19 | 2001-12-05 | 现代自动车株式会社 | Polypropylene resin composition |
| CN102986056A (en) * | 2010-07-27 | 2013-03-20 | 住友电气工业株式会社 | Electrical component, nonaqueous-electrolyte cell, and lead wire and sealable container both for use therein |
| CN204257745U (en) * | 2014-11-21 | 2015-04-08 | 住友电气工业株式会社 | Lug lead-in wire and electric energy storage device |
| CN104844880A (en) * | 2014-10-23 | 2015-08-19 | 青岛万力科技有限公司 | Anti-aging, toughening and reinforcing polyethylene powder |
| JP2016008260A (en) * | 2014-06-24 | 2016-01-18 | 三菱化学株式会社 | Thermoplastic elastomer composition, molded body, food appliance and sanitary fixture |
| CN105623073A (en) * | 2014-10-27 | 2016-06-01 | 中国石油天然气股份有限公司 | Method for improving properties of polypropylene material or product thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3114174B1 (en) | 1999-07-27 | 2000-12-04 | 住友電気工業株式会社 | Lead wires for non-aqueous electrolyte batteries |
| JP5402547B2 (en) | 2009-11-11 | 2014-01-29 | 住友電気工業株式会社 | Lead member, power storage device with lead member, and method of manufacturing lead member |
| JP6349986B2 (en) * | 2014-06-09 | 2018-07-04 | 凸版印刷株式会社 | Terminal film for power storage device and power storage device |
| KR20160060526A (en) * | 2014-11-20 | 2016-05-30 | 주식회사 폴 | Sealing member for lead tab of secondary battery |
| KR20160062870A (en) * | 2014-11-26 | 2016-06-03 | 주식회사 폴 | Sealing member for lead tab of secondary battery and method of sealing using the member |
| JP6484081B2 (en) | 2015-03-26 | 2019-03-13 | 株式会社カネカ | Multilayer film for tab lead |
| WO2018074090A1 (en) | 2016-10-17 | 2018-04-26 | 住友電気工業株式会社 | Lead wire for nonaqueous electrolyte batteries, and nonaqueous electrolyte battery comprising same |
-
2018
- 2018-10-30 WO PCT/JP2018/040301 patent/WO2019111592A1/en active Application Filing
- 2018-10-30 JP JP2019512324A patent/JP7104269B2/en active Active
- 2018-10-30 CN CN201880015896.7A patent/CN110419120B/en active Active
- 2018-10-30 KR KR1020197024290A patent/KR102227239B1/en active IP Right Grant
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1189924A (en) * | 1996-04-23 | 1998-08-05 | 住友电气工业株式会社 | Non-aqueous electrolyte cell |
| CN1324889A (en) * | 2000-05-19 | 2001-12-05 | 现代自动车株式会社 | Polypropylene resin composition |
| CN102986056A (en) * | 2010-07-27 | 2013-03-20 | 住友电气工业株式会社 | Electrical component, nonaqueous-electrolyte cell, and lead wire and sealable container both for use therein |
| JP2016008260A (en) * | 2014-06-24 | 2016-01-18 | 三菱化学株式会社 | Thermoplastic elastomer composition, molded body, food appliance and sanitary fixture |
| CN104844880A (en) * | 2014-10-23 | 2015-08-19 | 青岛万力科技有限公司 | Anti-aging, toughening and reinforcing polyethylene powder |
| CN105623073A (en) * | 2014-10-27 | 2016-06-01 | 中国石油天然气股份有限公司 | Method for improving properties of polypropylene material or product thereof |
| CN204257745U (en) * | 2014-11-21 | 2015-04-08 | 住友电气工业株式会社 | Lug lead-in wire and electric energy storage device |
Non-Patent Citations (1)
| Title |
|---|
| Adhesion of statistical and blocky ethylene–octene copolymers to polypropylene;P. Dias;《Polymer》;ELSEVIER;20080528;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019111592A1 (en) | 2019-06-13 |
| KR102227239B1 (en) | 2021-03-11 |
| JP7104269B2 (en) | 2022-07-21 |
| JPWO2019111592A1 (en) | 2020-11-19 |
| KR20190101482A (en) | 2019-08-30 |
| CN110419120A (en) | 2019-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101396635B1 (en) | Electrical component, nonaqueous-electrolyte cell, and lead wire and sealable container both for use therein | |
| CN108292733B (en) | Lead for nonaqueous electrolyte battery, and nonaqueous electrolyte battery comprising same | |
| US20210257625A1 (en) | Resin Current Collector and Laminated Type Resin Current Collector, and Lithium Ion Battery Comprising This | |
| JP3114174B1 (en) | Lead wires for non-aqueous electrolyte batteries | |
| JP7105114B2 (en) | Tab lead film and tab lead using the same | |
| CN110419120B (en) | Lead wire for nonaqueous electrolyte battery and nonaqueous electrolyte battery provided with same | |
| JP5375013B2 (en) | Electrical parts, non-aqueous electrolyte batteries, and lead wires and enclosures used for them | |
| JP7120502B1 (en) | Lead wire for non-aqueous electrolyte battery, insulating film and non-aqueous electrolyte battery | |
| JP2023097330A (en) | Lead wire for non-aqueous electrolyte battery, insulating film, and non-aqueous electrolyte battery | |
| CN116325309A (en) | Secondary battery | |
| JP7134853B2 (en) | Composite with composition layer and metal layer | |
| KR102048252B1 (en) | Lead sealant films and secondary batteries using the same | |
| CN113632312A (en) | Tab lead for battery | |
| JP7245570B1 (en) | Tab lead sealing film | |
| JP2016129105A (en) | Tab lead | |
| KR20200132517A (en) | Lead tab film for secondary battery and secondary battery comprising the same | |
| WO2023119721A1 (en) | Lead wire for nonaqueous electrolyte battery, insulating film, and nonaqueous electrolyte | |
| KR102048258B1 (en) | Lead sealant films and secondary batteries using the same | |
| JP2024505729A (en) | secondary battery | |
| KR20180092817A (en) | Lead sealant films and secondary batteries using the same | |
| CN115136395A (en) | Resin film for terminal and electricity storage device using same | |
| KR20200074359A (en) | Lead sealant films and secondary batteries using the same | |
| JP2013152829A (en) | Nonaqueous electrolyte battery lead wire and nonaqueous electrolyte battery using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |