WO2014126369A1 - 비정형 구조의 전지셀 - Google Patents
비정형 구조의 전지셀 Download PDFInfo
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- WO2014126369A1 WO2014126369A1 PCT/KR2014/001102 KR2014001102W WO2014126369A1 WO 2014126369 A1 WO2014126369 A1 WO 2014126369A1 KR 2014001102 W KR2014001102 W KR 2014001102W WO 2014126369 A1 WO2014126369 A1 WO 2014126369A1
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- Prior art keywords
- electrode
- battery cell
- electrode assembly
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Images
Classifications
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
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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
- H01M10/04—Construction or manufacture in general
- H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0436—Small-sized flat cells or batteries for portable equipment
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
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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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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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
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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
- H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
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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
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0082—Organic polymers
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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
- H01M50/557—Plate-shaped terminals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the present invention relates to a battery cell having an amorphous structure, and more particularly, an electrode assembly having a structure in which a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode are stacked is embedded in a battery case. It relates to a battery cell, characterized in that the inlet is formed in one side and / or the other side of the outer surface of the electrode assembly facing each other adjacent to the electrode terminal is increased in size in the outward direction of the electrode assembly.
- Lithium secondary batteries are largely classified into cylindrical batteries, square batteries, pouch-type batteries, and the like according to their appearance, and may be classified into lithium ion batteries, lithium ion polymer batteries, lithium polymer batteries, and the like depending on the type of electrolyte.
- a pouch type battery refers to a battery in which an electrode assembly and an electrolyte are sealed inside a pouch type case of a laminate sheet composed of a resin layer and a metal layer.
- the electrode assembly accommodated in the battery case has a structure of jelly-roll type (winding type), stacking type (lamination type), or composite type (stack / folding type).
- FIG. 1 schematically illustrates a structure of a pouch type secondary battery including a stacked electrode assembly.
- the pouch type secondary battery 10 may include an electrode assembly 30, electrode tabs 40 and 50 extending from the electrode assembly 30, and electrodes welded to the electrode tabs 40 and 50. And a battery case 20 accommodating the leads 60 and 70 and the electrode assembly 30.
- the electrode assembly 30 is a power generator in which a positive electrode and a negative electrode are sequentially stacked in a state where a separator is interposed therebetween, and has a stack type or a stack / fold type structure.
- the electrode tabs 40, 50 extend from each pole plate of the electrode assembly 30, and the electrode leads 60, 70 are welded, for example, with a plurality of electrode tabs 40, 50 extending from each pole plate. Each is electrically connected to each other, and part of the battery case 20 is exposed to the outside.
- an insulating film 80 is attached to a portion of the upper and lower surfaces of the electrode leads 60 and 70 in order to increase the sealing degree with the battery case 20 and to secure an electrical insulating state.
- the battery case 20 is made of an aluminum laminate sheet, provides a space for accommodating the electrode assembly 30, and has a pouch shape as a whole.
- the plurality of positive electrode tabs 40 and the plurality of negative electrode tabs 50 may be coupled together to the electrode leads 60 and 70.
- the upper end is spaced apart from the electrode assembly 30.
- the battery cells are configured to include the electrode assembly of the same size or capacity, in order to make a new structure in consideration of the design of the device to which the battery cell is applied, to reduce the capacity of the battery cell or larger There is a problem in that the design of the device must be changed in size.
- some prior art may configure a battery pack by stacking battery cells of different sizes.
- a battery pack has a structure in which battery cells are stacked, so that the electrochemical reactions are not shared between the stacked battery cells, and as a result, the battery pack becomes thick and the battery capacity may be reduced due to the thickness.
- the present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.
- an object of the present invention is to design a structure that can be mounted in the shape and space of a variety of devices, to maximize the utilization of the internal space of the device, and to move away from the external structure of the device having a generally rectangular structure and various appearances
- the present invention provides a battery cell that can be efficiently mounted in a device.
- a battery cell according to the present invention for achieving the above object is a battery cell in which an electrode assembly having a structure in which a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode is stacked is built in a battery case,
- the outer surface is formed of a structure in which the inlet is formed to increase in the outward direction of the electrode assembly on one side and / or the other side of the opposite sides adjacent to the electrode terminal.
- the battery cell according to the present invention is formed in the inlet of the specific structure on the outer surface of the electrode assembly, it is applicable to the shape of the device of the curved or protruding structure, based on the specific structure as described above, Since it can be manufactured as a battery cell having a size, it is possible to maximize the utilization of the internal space of the device.
- an opposite sides adjacent to the electrode terminal means, for example, both sides facing each other while facing each other when the electrode assembly is a hexahedral structure and the electrode terminal is formed on one side thereof. . Therefore, when the electrode assembly has a rectangular parallelepiped structure and the electrode terminals are formed on one surface having a relatively narrow width, the both sides may be a front surface and a rear surface having the largest area while contacting the one surface.
- the electrode assembly is stacked two or more electrode groups stacked in the order of the first electrode / separator / second electrode in the state that the separator is interposed, at least one of the electrode groups to form an inlet It is made of a structure in which an opening for drilling is perforated.
- the electrode assembly is a structure in which a base electrode group having no opening is punched and at least one punctured electrode group having a hole opening are stacked. More specifically, the electrode assembly is a base electrode group. It may have a structure in which two or more puncture electrode groups are included, and the puncture electrode groups are stacked in order of increasing size of the opening on the base electrode group.
- the size of the openings is determined by the size of the maximum inner diameter passing through the center of the opening, and the perforated electrode groups are perforated in the size range of 5 to 80% based on the area of one surface of the basic electrode group.
- the shape of the opening in the punctured electrode groups may be selected in consideration of the corresponding shape of the device. Specifically, the shape of the opening may be circular, elliptical, or polygonal in plan view, but is not limited thereto.
- the arrangement of the openings of the puncture electrode groups is not particularly limited.
- the openings of the puncture electrode groups may have a structure in which the central axes of the openings are stacked in a matching arrangement. .
- the central axis of the openings may be inclined with respect to the vertical through axis of the electrode assembly, or may be a structure in which one end of the inner surface of the openings is stacked in a matching arrangement.
- each of the punctured electrodes may include openings of various shapes, and in detail, at least two of the punctured electrode groups of the punctured electrode groups may have a structure including openings of different shapes. have.
- various indentations can be formed, for example, in the arrangement in which the openings have the same shape and the central axes of the openings coincide with each other.
- the indentation may have a structure having a shape of a size gradient in which the size increase in the outward direction is sequentially increased, or the indentation may have a shape of a size gradient in which the size increase in the outward direction is sequentially reduced.
- the battery cell can be flexibly applied to the corresponding shape of the device, it is possible to save the internal space as large as the size of the inlet, and to further vary the design of the device have.
- the battery case is easy to correspond to the shape of the electrode assembly having the inlets, and in detail, the battery case may be a laminate sheet or a metal can including a resin layer and a metal layer, It is not limited.
- the electrode assembly accommodating portion of the battery case made of the laminate sheet or the metal is formed to deform to correspond to the indentation of the electrode assembly to form a battery cell.
- the outer shape of the battery case may be formed in various ways.
- an electrode assembly having stacked electrodes according to the present invention may be inserted into an accommodating part of a battery case, and vacuum may be applied to the accommodating part to form an outer shape of the battery case.
- the outer shape of the battery case can be formed by pressing a mold (punch or the like) corresponding to the indentation shape of the electrode assembly by pressing the upper end of the electrode assembly in which the indentation is formed.
- the electrode assembly includes a structure including electrodes including openings and an indentation hole formed by stacking electrodes.
- the electrode assembly is mounted on an accommodating part of a battery case, and vacuum or compression is applied to the accommodating part. When applied, the battery case is deformed while being deformed to correspond to the outer shape of the electrode assembly.
- the battery cell may be a lithium ion battery or a lithium ion polymer battery cell, but is not limited thereto.
- a lithium secondary battery is composed of a positive electrode, a negative electrode, a separator, and a lithium salt-containing nonaqueous electrolyte.
- the positive electrode is prepared by, for example, applying a mixture of a positive electrode active material, a conductive material, and a binder to a positive electrode current collector, followed by drying, and optionally, a filler is further added to the mixture.
- the conductive material is typically added in an amount of 1 to 30 wt% based on the total weight of the mixture including the positive electrode active material.
- a conductive material is not particularly limited as long as it has conductivity without causing chemical change in the battery, and examples thereof include graphite such as natural graphite and artificial graphite; Carbon blacks such as carbon black, acetylene black, Ketjen black, channel black, furnace black, lamp black, and summer black; Conductive fibers such as carbon fibers and metal fibers; Metal powders such as carbon fluoride powder, aluminum powder and nickel powder; Conductive whiskeys such as zinc oxide and potassium titanate; Conductive metal oxides such as titanium oxide; Conductive materials such as polyphenylene derivatives and the like can be used.
- the binder is a component that assists the bonding of the active material and the conductive material to the current collector, and is generally added in an amount of 1 to 30 wt% based on the total weight of the mixture including the positive electrode active material.
- binders include polyvinylidene fluoride, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene , Polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene butylene rubber, fluorine rubber, various copolymers and the like.
- the filler is optionally used as a component for inhibiting expansion of the positive electrode, and is not particularly limited as long as it is a fibrous material without causing chemical change in the battery.
- the filler include olefinic polymers such as polyethylene and polypropylene; Fibrous materials, such as glass fiber and carbon fiber, are used.
- the negative electrode is manufactured by coating and drying a negative electrode active material on a negative electrode current collector, and optionally, the components as described above may optionally be further included.
- carbon such as hardly graphitized carbon and graphite type carbon
- the separator is interposed between the anode and the cathode, and an insulating thin film having high ion permeability and mechanical strength is used.
- the pore diameter of the separator is generally from 0.01 to 10 ⁇ m ⁇ m, thickness is generally 5 ⁇ 300 ⁇ m.
- a separator for example, olefin polymers such as chemical resistance and hydrophobic polypropylene; Sheets or non-woven fabrics made of glass fibers or polyethylene are used.
- a solid electrolyte such as a polymer
- the solid electrolyte may also serve as a separator.
- the lithium salt-containing non-aqueous electrolyte solution consists of a polar organic electrolyte solution and a lithium salt.
- a non-aqueous liquid electrolyte an organic solid electrolyte, an inorganic solid electrolyte, and the like are used.
- N-methyl- 2-pyrrolidinone a propylene carbonate, ethylene carbonate, butylene carbonate, dimethyl carbonate, diethyl carbonate, gamma
- Butyl lactone 1,2-dimethoxy ethane, tetrahydroxy franc, 2-methyl tetrahydrofuran, dimethylsulfoxide, 1,3-dioxorone, formamide, dimethylformamide, dioxorone , Acetonitrile, nitromethane, methyl formate, methyl acetate, phosphate triester, trimethoxy methane, dioxorone derivatives, sulfolane, methyl sulfolane, 1,3-dimethyl-2-imidazolidinone, propylene carbo Aprotic organic solvents such as nate derivatives, tetrahydrofuran derivatives, ethers, methyl pyroionate and ethyl
- organic solid electrolyte examples include polyethylene derivatives, polyethylene oxide derivatives, polypropylene oxide derivatives, phosphate ester polymers, polyedgetion lysine, polyester sulfides, polyvinyl alcohols, polyvinylidene fluorides, Polymers containing ionic dissociating groups and the like can be used.
- Examples of the inorganic solid electrolyte include Li 3 N, LiI, Li 5 NI 2 , Li 3 N-LiI-LiOH, LiSiO 4 , LiSiO 4 -LiI-LiOH, Li 2 SiS 3 , Li 4 SiO 4 , Nitrides, halides, sulfates and the like of Li, such as Li 4 SiO 4 -LiI-LiOH, Li 3 PO 4 -Li 2 S-SiS 2 , and the like, may be used.
- the lithium salt is a good material to be dissolved in the non-aqueous electrolyte, for example, LiCl, LiBr, LiI, LiClO 4 , LiBF 4 , LiB 10 Cl 10 , LiPF 6 , LiCF 3 SO 3 , LiCF 3 CO 2 , LiAsF 6, LiSbF 6, LiAlCl 4, CH 3 SO 3 Li, CF 3 SO 3 Li, (CF 3 SO 2) 2 NLi, chloroborane lithium, lower aliphatic carboxylic acid lithium, lithium tetraphenyl borate and imide have.
- the non-aqueous electrolyte solution includes, for example, pyridine, triethyl phosphite, triethanolamine, cyclic ether, ethylene diamine, n-glyme, hexaphosphate triamide, and the like.
- halogen-containing solvents such as carbon tetrachloride and ethylene trifluoride may be further included, and carbon dioxide gas may be further included to improve high temperature storage characteristics.
- the present invention also provides a device including the battery cell as a power source, the device is a mobile phone, portable computer, smartphone, tablet PC, smart pad, netbook, LEV (Light Electronic Vehicle), electric vehicle, It may be selected from a hybrid electric vehicle, a plug-in hybrid electric vehicle, and a power storage device.
- the device is a mobile phone, portable computer, smartphone, tablet PC, smart pad, netbook, LEV (Light Electronic Vehicle), electric vehicle, It may be selected from a hybrid electric vehicle, a plug-in hybrid electric vehicle, and a power storage device.
- the present invention also provides a battery pack containing two or more of the battery cells as a unit battery. That is, a battery pack having a structure in which two or more battery cells are connected in series and / or in parallel as a unit battery, and the battery pack is a mobile phone, a portable computer, a smartphone, a tablet PC, a smart pad, a netbook, a LEV. Light electronic vehicles, electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, and power storage devices.
- FIG. 1 is a schematic diagram of a conventional battery cell
- FIG. 2 is a schematic view of a battery cell including an electrode assembly formed with an indentation according to the present invention
- FIG. 3 is a schematic diagram of electrode groups according to one embodiment of the present invention.
- FIG. 4 is a schematic diagram showing electrode groups and a stacked form
- FIG. 5 is a schematic view of an electrode assembly according to one embodiment of the present invention and a cross-sectional view (A-A ') of the electrode assembly;
- FIG. 6 is a schematic view of the electrode assembly according to another embodiment of the present invention and a cross-sectional view (A-A ') of the electrode assembly;
- FIG. 7 is a schematic view of the electrode assembly according to another embodiment of the present invention and a cross-sectional view (A-A ') of the electrode assembly;
- FIG. 8 is a schematic view of the electrode assembly according to another embodiment of the present invention and a cross-sectional view (A-A ') of the electrode assembly;
- FIG. 9 is a schematic view of the electrode assembly according to another embodiment of the present invention and a cross-sectional view (A-A ') of the electrode assembly;
- FIG. 10 is a schematic view of an electrode assembly according to another embodiment of the present invention.
- FIG. 2 schematically illustrates a battery cell structure including an electrode assembly having an indentation according to the present invention.
- the battery cell 100 includes an electrode assembly 222 having an indentation 220 having a size increased in an outward direction in a pouch-type battery case 120, and having positive and negative electrode tabs 130 thereof. , 140 and two electrode leads 132 and 142 electrically connected to each other, are sealed to be exposed to the outside.
- FIG. 3 illustrates a plan view of electrode groups according to an exemplary embodiment of the present invention
- FIG. 4 schematically illustrates electrode groups and a stacked form.
- the basic electrode group 200 has a structure in which a separator 190 is interposed between the first electrode 160 and the second electrode 162.
- the openings 203 having the same size are punctured in the first electrode 170 and the second electrode 172, and the first electrode 170 and the second electrode 172 are separated from each other.
- the separator 191 is interposed between the structure is made.
- an opening 205 having a size wider than that of the opening 203 of the first electrode group 200 is punctured in the first electrode 180 and the second electrode 182.
- the separator 192 is interposed between the electrode 180 and the second electrode 182.
- the first punctured electrode group 202 and the second punctured electrode group 204 are sequentially arranged such that the sizes of the openings 203 and 205 increase in the stacking direction.
- the first punctured electrode group 202 is stacked in a state where a separator (not shown) is disposed on the upper surface of the basic electrode group 200, and the separator is disposed on the upper surface of the first punctured electrode group 202.
- the second punctured electrode group 204 is stacked.
- FIG. 5 is a schematic view of the electrode assembly according to an embodiment of the present invention and a cross-sectional view in the transverse direction (A-A ') of the electrode assembly.
- the electrode assembly 222 may include a center axis of the openings in which the first punctured electrode group 202 and the second punctured electrode group 204 have the same shape, and a vertical through axis C of the electrode assembly.
- the inlet 220 is stacked in a matching arrangement with each other, and the inlet 220 is stacked with the first punctured electrode group 202 and the second punctured electrode group 204 in an increasing order of size, It forms a size gradient (G) in the outward direction of the electrode assembly 222 has a structure in which the size increase is large at a constant rate.
- FIG. 6 is a schematic view of the electrode assembly according to another embodiment of the present invention and a cross-sectional view (A-A ') of the electrode assembly is shown.
- the central axes C1 and C2 of the openings in which the first punctured electrode group 302 and the second punctured electrode group 304 have the same shape as each other are vertically penetrated through the electrode assembly.
- the structure is stacked in a shape inclined with a constant gradient G1 with respect to the axis C, and steps 306 are formed on both outer sides of the electrode assembly to form the same slope as the gradient G1.
- FIG. 7 is a schematic view of an electrode assembly according to another embodiment of the present invention and a cross-sectional view in the transverse direction (A-A ') of the electrode assembly is shown.
- one end of the inner surface of the openings having the same shape as the first punctured electrode group 402 and the second punctured electrode group 404 may be based on the vertical through axis H. It consists of a structure stacked in a matching arrangement with each other.
- FIG. 8 is a schematic view of an electrode assembly according to another embodiment of the present invention and a cross-sectional view in the transverse direction (A-A ') of the electrode assembly is shown.
- the punctured electrode groups 502 are stacked in an arrangement in which the center axis of the openings and the vertical through axis C of the electrode assembly coincide with each other to form the inlet 520.
- the indentation 520 forms a size gradient G2 in the outward direction of the electrode assembly 522 as the perforated electrode groups 502 are stacked in the order of increasing the size of the opening, and the increase in size is sequentially performed. The structure is getting smaller.
- FIG. 9 is a schematic view of the electrode assembly according to another embodiment of the present invention and a cross-sectional view (A-A ') of the electrode assembly is shown.
- the electrode assembly 622 is formed by stacking the punctured electrode groups 602 in an arrangement in which the center axis of the openings and the vertical through axis C of the electrode assembly coincide with each other to form the indentation 620.
- the inlet 620 forms a size gradient G3 in the outward direction of the electrode assembly 622 as the perforated electrode groups 602 are stacked in the order of increasing the size of the opening. The structure is growing.
- FIG. 10 is a schematic view of an electrode assembly according to another embodiment of the present invention.
- the electrode assembly 722 has a structure consisting of a stack of punched electrode groups including a circular opening 720 and a punched electrode group including a polygonal opening 721.
- the battery cell according to the present invention can be made of a battery cell having a variety of inlet sizes, not only can be easily mounted to the space where the conventional battery cell was difficult to mount, but also of the device Depending on the internal structure, cells with larger capacity can be mounted in a limited space, maximizing the utilization of the device's internal space.
- the battery cell according to the present invention is formed in the inlet opening to increase the size of the outside thereof, can be applied to various shapes of the device, it is possible to further secure the mounting space of the battery cell In addition, it is possible to maximize the utilization of the internal space of the device, as well as the use of a high capacity battery cell in the device, there is an effect that can further downsize the device.
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Abstract
Description
Claims (20)
- 양극, 음극, 및 상기 양극과 음극 사이에 개재된 분리막이 적층된 구조의 전극조립체가 전지케이스에 내장되어 있는 전지셀로서,상기 전극조립체의 외면들 중에서 전극단자에 인접한 상호 대향하는 양면들 중에서 일면 및/또는 타면에 전극조립체의 외측 방향으로 크기가 증가하는 만입구가 형성되어 있는 것을 특징으로 하는 전지셀.
- 제 1 항에 있어서, 상기 전극조립체는 제 1 전극/분리막/제 2 전극의 순으로 적층된 전극군이 분리막이 개재된 상태에서 둘 이상 적층되어 있고, 전극군들 중에서 적어도 하나에는 만입구를 형성하기 위한 개구가 천공되어 있는 것을 특징으로 하는 전지셀.
- 제 2 항에 있어서, 상기 전극조립체는, 개구가 천공되어 있지 않은 기본 전극군과, 개구가 천공되어 있는 하나 이상의 천공 전극군이 적층되어 있는 것을 특징으로 하는 전지셀.
- 제 3 항에 있어서, 상기 전극조립체는 기본 전극군과 2개 이상의 천공 전극군들을 포함하고 있고, 상기 기본 전극군 상에 개구의 크기가 증가하는 순서로 천공 전극군들이 적층되어 있는 것을 특징으로 하는 전지셀.
- 제 2 항에 있어서, 상기 천공 전극군들의 개구의 형상은 평면상으로 원형, 타원형, 또는 다각형인 것을 특징으로 하는 전지셀.
- 제 4 항에 있어서, 상기 천공 전극들은 동일한 형상의 개구들을 포함하고 있고, 개구들의 중심 축이 일치하는 배열로 적층되어 있는 것을 특징으로 하는 전지셀.
- 제 4 항에 있어서, 상기 천공 전극들은 동일한 형상의 개구들을 포함하고 있고, 개구들의 중심 축이 전극조립체의 수직 관통 축에 대해 기울어진 형상으로 적층되어 있는 것을 특징으로 하는 전지셀.
- 제 4 항에 있어서, 상기 천공 전극들은 동일한 형상의 개구들을 포함하고 있고, 개구들의 내면 일측 단부가 일치하는 배열로 적층되어 있는 것을 특징으로 하는 전지셀.
- 제 4 항에 있어서, 상기 천공 전극군들 중의 적어도 2개의 천공 전극군들은 서로 다른 형상의 개구들을 포함하고 있는 것을 특징으로 하는 전지셀.
- 제 4 항에 있어서, 상기 개구들의 크기는 개구의 중심을 지나는 최대 내경의 크기에 의해 결정되는 것을 특징으로 하는 전지셀.
- 제 4 항에 있어서, 상기 천공 전극군들은 기본 전극군의 일면의 면적을 기준으로 5 내지 80% 크기 범위에서 개구가 천공되어 있는 것을 특징으로 하는 전지셀.
- 제 1 항에 있어서, 상기 만입구는 외측 방향으로의 크기 증가가 일정한 크기 구배의 형상을 가진 것을 특징으로 하는 전지셀.
- 제 1 항에 있어서, 상기 만입구는 외측 방향으로의 크기 증가가 순차적으로 커지는 크기 구배의 형상을 가진 것을 특징으로 하는 전지셀.
- 제 1 항에 있어서, 상기 만입구는 외측 방향으로의 크기 증가가 순차적으로 작아지는 크기 구배의 형상을 가진 것을 특징으로 하는 전지셀.
- 제 1 항에 있어서, 상기 전지케이스에서 수지층과 금속층을 포함하는 라미네이트 시트 또는 금속 캔으로 이루어진 것을 특징으로 하는 전지셀.
- 제 1 항에 있어서, 상기 전지케이스의 전극조립체 수납부는 전극조립체의 만입부에 대응하여 변형되어 있는 것을 특징으로 하는 전지셀.
- 제 1 항에 있어서, 상기 전지셀은 리튬이온 전지셀 또는 리튬이온 폴리머 전지셀인 것을 특징으로 하는 전지셀..
- 제 1 항 내지 제 17 항 중 어느 하나에 따른 전지셀을 단위전지로서 둘 이상 포함하고 있는 것을 특징으로 하는 전지팩.
- 제 18 항에 따른 전지팩을 전원으로 포함하고 있는 디바이스.
- 제 19 항에 있어서, 상기 디바이스는 휴대폰, 휴대용 컴퓨터, 스마트폰, 태플릿 PC, 스마트 패드, 넷북, LEV(Light Electronic Vehicle), 전기자동차, 하이브리드 전기자동차, 플러그-인 하이브리드 전기자동차, 및 전력저장장치로 이루어진 군에서 선택되는 것을 특징으로 하는 디바이스.
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EP14751464.0A EP2922135B1 (en) | 2013-02-13 | 2014-02-11 | Battery cell having amorphous structure |
CN201480003313.0A CN104838532B (zh) | 2013-02-13 | 2014-02-11 | 具有不规则结构的电池单元 |
US14/440,734 US9666869B2 (en) | 2013-02-13 | 2014-02-11 | Battery cell of irregular structure |
JP2015541704A JP6037587B2 (ja) | 2013-02-13 | 2014-02-11 | 非定型構造の電池セル |
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CN107750407A (zh) * | 2015-06-18 | 2018-03-02 | 儒特杰德公司 | 锂离子二次电池 |
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WO2018131344A1 (ja) * | 2017-01-13 | 2018-07-19 | 株式会社村田製作所 | 二次電池の製造方法 |
US11942597B2 (en) * | 2018-03-28 | 2024-03-26 | Honda Motor Co., Ltd. | Solid-state battery and solid-state battery module |
US11522225B2 (en) * | 2018-08-08 | 2022-12-06 | Prologium Technology Co., Ltd. | Horizontal composite electricity supply element group |
CN111384362B (zh) * | 2018-12-28 | 2022-06-28 | 北京好风光储能技术有限公司 | 电极片生产设备、生产线及电极片加工方法 |
JP7099989B2 (ja) * | 2019-05-22 | 2022-07-12 | プライムアースEvエナジー株式会社 | 二次電池及び二次電池の製造方法 |
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Also Published As
Publication number | Publication date |
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EP2922135B1 (en) | 2018-04-11 |
CN104838532B (zh) | 2017-12-05 |
KR20140102379A (ko) | 2014-08-22 |
CN104838532A (zh) | 2015-08-12 |
KR101573683B1 (ko) | 2015-12-03 |
US9666869B2 (en) | 2017-05-30 |
EP2922135A1 (en) | 2015-09-23 |
US20150340700A1 (en) | 2015-11-26 |
JP6037587B2 (ja) | 2016-12-07 |
JP2016501423A (ja) | 2016-01-18 |
EP2922135A4 (en) | 2015-12-23 |
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