WO2022108139A1 - 이차 전지 - Google Patents
이차 전지 Download PDFInfo
- Publication number
- WO2022108139A1 WO2022108139A1 PCT/KR2021/014898 KR2021014898W WO2022108139A1 WO 2022108139 A1 WO2022108139 A1 WO 2022108139A1 KR 2021014898 W KR2021014898 W KR 2021014898W WO 2022108139 A1 WO2022108139 A1 WO 2022108139A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- terminal
- cap plate
- protrusion
- plate
- coupled
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 12
- 239000011231 conductive filler Substances 0.000 claims description 8
- 229920000642 polymer Polymers 0.000 claims description 8
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 6
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 6
- 229920000553 poly(phenylenevinylene) Polymers 0.000 claims description 6
- 229920001197 polyacetylene Polymers 0.000 claims description 6
- 229920000767 polyaniline Polymers 0.000 claims description 6
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 6
- -1 polyphenylene vinylene Polymers 0.000 claims description 6
- 229920000128 polypyrrole Polymers 0.000 claims description 6
- 229920000123 polythiophene Polymers 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000002041 carbon nanotube Substances 0.000 claims description 3
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 description 9
- 229910000838 Al alloy Inorganic materials 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- JFBZPFYRPYOZCQ-UHFFFAOYSA-N [Li].[Al] Chemical compound [Li].[Al] JFBZPFYRPYOZCQ-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 239000007772 electrode material Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 2
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 229910003480 inorganic solid Inorganic materials 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000570 Cupronickel Inorganic materials 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000011245 gel electrolyte Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
Images
Classifications
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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
-
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
- H01M50/147—Lids or covers
-
- 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
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
-
- 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
- H01M50/172—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
-
- 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
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
- H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
-
- 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
-
- 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
-
- 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
-
- 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 secondary battery capable of withstanding the pressure of gas generated inside the cell.
- a secondary battery is a power storage system that provides excellent energy density for storing electrical energy in the form of chemical energy.
- secondary batteries are rechargeable and are widely used in IT devices such as smartphones, cellular phones, laptops, and tablet PCs.
- IT devices such as smartphones, cellular phones, laptops, and tablet PCs.
- high-capacity secondary batteries are being adopted for electric vehicles.
- Such secondary batteries are required to have characteristics such as high density, high output, and stability.
- the present invention provides a secondary battery capable of increasing durability, reinforcing the rigidity of a cap plate, and reducing cell weight.
- a secondary battery according to the present invention includes an electrode assembly; a case in which the electrode assembly is accommodated; a cap plate coupled to the case to seal the electrode assembly; a terminal connected to the electrode assembly and exposed through the cap plate; and a protrusion protruding toward the terminal may be formed in a region where the terminal is coupled to the cap plate.
- the protrusion of the cap plate may be formed along a periphery of the terminal passing through the cap plate.
- the charging member may include a first protrusion that protrudes downward and is coupled to an inner side of the protrusion of the cap plate.
- the first protrusion of the charging member may be coupled to the inside of the protrusion of the cap plate, and the terminal may be coupled into a through hole of the cap plate through which the terminal passes.
- the first protrusion of the charging member may include an inner surface in contact with the terminal or a sealing gasket formed around the terminal.
- the charging member may include a second protrusion protruding upward along the edge.
- the second protrusion of the charging member may cover a lower side of the terminal plate exposed from the upper portion of the terminal, thereby accommodating at least a portion of the terminal plate.
- the cap plate may include a groove corresponding to a height of the protrusion with respect to a lower region of the protrusion, and a sealing gasket coupled to the terminal may be coupled to the groove at a lower portion of the protrusion.
- the charging member includes a polymer and a conductive filler
- the polymer includes polyphenylene sulfide (PPS), polyacetylene (PA), polyphenylene vinylene (PPV), polypyrrole (PPY), polyaniline (PANI), polythiophene (PT), and PEDOT. (poly3,4-etylenedioxythiophene), or a combination thereof
- the conductive filler may include any one selected from carbon black, carbon fibers, and carbon nanotubes, or a combination thereof.
- an alloy eg, lithium aluminum (LiAl) alloy
- LiAl lithium aluminum
- the secondary battery according to the present invention forms a coupling protrusion on the cap plate to secure a rigid structure against bending and deformation of the cap plate.
- the secondary battery according to the present invention may reduce the thickness of the terminal plate, thereby reducing the cell weight.
- FIG. 1 is a perspective view illustrating an exemplary secondary battery according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view illustrating the exemplary secondary battery shown in FIG. 1 .
- FIG. 3 is an enlarged view of part A of FIG. 2 .
- FIG. 4 is a partial perspective view illustrating an exemplary secondary battery according to an embodiment of the present invention.
- FIG. 5 is an exploded perspective view of FIG. 4 ;
- first, second, etc. are used herein to describe various members, parts, regions, layers and/or parts, these members, parts, regions, layers, and/or parts are limited by these terms so that they It is self-evident that These terms are used only to distinguish one member, component, region, layer or portion from another region, layer or portion. Accordingly, a first member, component, region, layer, or portion described below may refer to a second member, component, region, layer or portion without departing from the teachings of the present invention.
- Space-related terms such as “beneath”, “below”, “lower”, “above”, and “upper” refer to an element or feature shown in the drawing It may be used to facilitate understanding of other elements or features. These space-related terms are for easy understanding of the present invention according to various process conditions or usage conditions of the present invention, and are not intended to limit the present invention. For example, if an element or feature in a figure is turned over, an element or feature described as “below” or “below” becomes “above” or “above”. Accordingly, “lower” is a concept encompassing “upper” or "below”.
- FIG. 1 is a perspective view illustrating an exemplary secondary battery according to an embodiment of the present invention.
- the secondary battery 100 includes electrode assemblies 110 and 210 (refer to FIGS. 3 and 4 ), a first terminal 120 , a second terminal 130 , a case 140 , and a cap assembly. (150).
- first and second terminals 120 and 130 may penetrate through the cap assembly 150 and be exposed upwardly.
- first terminal 120 may include or be referred to as a negative terminal and the second terminal 130 may include or be referred to as a positive terminal.
- the upper insulating member 162 may be interposed between the first terminal 120 and the cap assembly 150 , and the charging member 180 may be disposed between the second terminal 130 and the cap assembly 150 . ) may be interposed. Accordingly, the first terminal 120 and the cap assembly 150 may be electrically insulated (ie, separated) from each other. In addition, the second terminal 130 and the cap assembly 150 may be electrically connected (ie, connected) to each other, and accordingly, the case 140 may be charged with, for example, a positive electrode (or a negative electrode). .
- the case 140 may be formed by a deep drawing process using a metal plate or a bending and welding process using a metal plate, and may also accommodate the electrode assemblies 110 and 120 and the cap assembly 150 may be seated. It may be in the form of an approximately hexahedron with space.
- the case 140 includes a rectangular bottom portion 141 having a long side and a short side, long sides 142 and 143 bent and extended from each long side of the bottom portion 141 toward the cap assembly 150 , and a bottom; Short side portions 144 and 145 extending from each short side of the portion 141 toward the cap assembly 150 may be included.
- case 140 may include or be referred to as a case, housing, or exterior material.
- the cap assembly 150 may include a cap plate 151 , a plug 152 , and a safety vent 153 . This will be explained again below.
- FIG. 2 is a cross-sectional view illustrating the exemplary secondary battery shown in FIG. 1 .
- 3 is an enlarged view of part A of FIG. 2 .
- the secondary battery 100 may include an electrode assembly 110 having a winding axis in a horizontal direction (ie, a direction substantially parallel to the longitudinal direction of the cap assembly 150 ).
- the electrode assembly may include a stack type as well as a wound type.
- the electrode assembly 110 may be formed by winding or overlapping a laminate of the first electrode plate 111 , the separator 113 , and the second electrode plate 112 formed in a thin plate shape or a film shape.
- the first electrode plate 111 may serve as a cathode, and the second electrode plate 112 may serve as an anode.
- the first electrode plate 111 is formed by coating a first electrode active material such as graphite or carbon on a first electrode current collector formed of a metal foil such as copper, a copper alloy, nickel, or a nickel alloy, It may include a first electrode uncoated region 111a that is an area on which an electrode active material is not applied.
- the second electrode plate 112 is formed by coating a second electrode active material such as a transition metal oxide on a second electrode current collector formed of a metal foil such as aluminum or an aluminum alloy, and the second electrode active material is not applied.
- the second electrode uncoated region 112a may be included.
- the separator 113 is positioned between the first electrode plate 111 and the second electrode plate 112 to prevent a short circuit and to enable the movement of lithium ions, and is made of polyethylene, polypropylene, or poly It may include a composite film of ethylene and polypropylene.
- the separator 113 may include a functional film coated with an inorganic material layer on a porous polymer film.
- the separator 113 may be replaced with an inorganic solid electrolyte such as a sulfide-based, oxide-based or phosphate-based electrolyte that does not require a liquid or gel electrolyte.
- a first terminal 120 and a second terminal 130 electrically connected to each of the first electrode plate 111 and the second electrode plate 112 may be positioned at both ends of the electrode assembly 110 as described above. have.
- the electrode assembly 110 may be accommodated in the case 140 together with the electrolyte.
- the electrolyte may include a lithium salt such as LiPF 6 in an organic solvent such as ethylene carbonate (EC), dimethyl carbonate (DMC), diethyl carbonate (DEC), or ethyl-methyl carbonate (EMC).
- EC ethylene carbonate
- DMC dimethyl carbonate
- DEC diethyl carbonate
- EMC ethyl-methyl carbonate
- the electrolyte may be in a liquid or gel form. In some examples, when an inorganic solid electrolyte is used, the electrolyte may be omitted.
- the first terminal 120 may be formed of a metal and may be electrically connected to the first electrode plate 111 .
- the first terminal 120 may include a first current collecting plate 121 , a first terminal pole 122 , and a first terminal plate 123 .
- the first current collecting plate 121 may be in contact with the first electrode uncoated region 111a protruding from one end of the electrode assembly 110 . Substantially, the first current collecting plate 121 may be welded to the first electrode uncoated region 111a. In some examples, the first current collecting plate 121 may be formed in an approximately 'L' shape. In some examples, the first terminal pole 122 may be integrally formed with the first current collecting plate 121 , or the first terminal pole 122 may be separately provided to perform riveting and riveting on the first current collecting plate 121 . / or can be welded. In some examples, the first current collecting plate 121 may be made of copper or a copper alloy.
- the first terminal pole 122 protrudes and extends upward a predetermined length through a cap plate 151 to be described later, and is to be electrically connected to the first current collector plate 121 under the cap plate 151 .
- the first terminal pole 122 may include a flange 122a extending along the length direction of the cap plate 151 to prevent the first terminal pole 122 from falling out.
- the first terminal pole 122 may be integrally formed with the first current collecting plate 121 , or may be riveted and/or welded after being inserted into the first current collecting plate 121 .
- the first terminal pole 122 may be electrically insulated from the cap plate 151 .
- the first terminal pole 122 may be made of copper, a copper alloy, aluminum, or an aluminum alloy.
- the first terminal plate 123 may include a hole 123a, to which the first terminal pole 122 may be coupled and riveted and/or welded.
- an interface between the first terminal pole 122 exposed upward and the first terminal plate 123 may be welded to each other. For example, since a laser beam is provided to the boundary region between the first terminal post 122 and the first terminal plate 123 exposed upward, the boundary regions may be melted and then cooled and combined.
- a bus bar (not shown) formed of aluminum or an aluminum alloy is welded to the first terminal plate 123 , so that a plurality of secondary batteries may be connected in series or in parallel.
- the second terminal 130 is also formed of metal and may be electrically connected to the second electrode plate 112 .
- the second terminal 130 may include a second current collecting plate 131 , a second terminal pole 132 , and a second terminal plate 133 .
- the second current collecting plate 131 may be in contact with the second electrode uncoated region 112a protruding from one end of the electrode assembly 110 .
- the second current collecting plate 131 may be formed in an approximately 'L' shape.
- the second terminal pole 132 is integrally formed with the second current collector plate 131 , or the second terminal pole 132 is separately provided to be fitted and coupled to the second current collector plate 131 .
- the second current collector plate 131 may be made of, for example, but not limited to, aluminum or an aluminum alloy.
- the second terminal pole 132 may protrude and extend upward by a predetermined length through a cap plate 151 to be described later, and may also be electrically connected to the second current collector plate 131 under the cap plate 151 .
- the second terminal pole 132 may include a flange 132a that protrudes and extends to the upper portion of the cap plate 151 by a predetermined length and prevents the second terminal pole 132 from falling out of the lower portion of the cap plate 151 . can In the second terminal pole 132 , a region positioned below the flange 132a may be inserted into the second current collecting plate 131 and then riveted and/or welded.
- the second terminal pole 132 may be made of aluminum or an aluminum alloy.
- the second terminal plate 133 may include a hole 133a, and may be coupled to the second terminal pole 132 through the hole 133a. Also, the second terminal post 132 and the second terminal plate 133 may be riveted and/or welded to each other. In some examples, a boundary region of the second terminal pole 132 exposed upward and the second terminal plate 133 may be welded to each other. For example, as a laser beam is provided to the boundary area between the second terminal post 132 and the second terminal plate 133 exposed upward, the boundary area may be melted and cooled to be coupled to each other. In addition, by welding a bus bar (not shown) of aluminum or an aluminum alloy to the second terminal plate 133 , a plurality of secondary batteries may be connected in series or in parallel. In some examples, the second terminal plate 133 may be electrically connected to the cap plate 151 , so that the cap plate 151 and the case 140 to be described below have the same polarity ( For example, it may have an anode).
- the cap assembly 150 may be coupled to the case 140 .
- cap assembly 150 may include or be referred to as cap plate 151 .
- the cap plate 151 seals the space of the case 140 , and may be formed of the same material as the case 140 .
- the cap plate 151 may be coupled to the case 140 by laser welding.
- the cap plate 151 since the cap plate 151 may have the same polarity as the second terminal 130 as described above, the cap plate 151 and the case 140 may have the same polarity.
- the cap plate 151 may include a through hole through which the first terminal pole 122 and the second terminal pole 132 respectively pass.
- the cap plate 151 may further include an injection hole 151c in which the electrolyte is injected and a vent hole 151d in which a safety vent is installed.
- the plug 152 may block the injection hole 151c to prevent the electrolyte contained inside the case 140 from leaking.
- the plug 152 may be laser-welded to the cap plate 151 after being coupled to the injection hole 151c.
- the safety vent 153 blocks the vent hole 151d, and when the internal pressure of the case 140 is higher than the set pressure, the high-pressure gas inside may be discharged to the outside. In some examples, after the safety vent 153 is coupled to the vent hole 151d, laser welding may be performed to the cap plate 151 .
- an insulating seal gasket 161 may be interposed between the first terminal post 122 and the through hole of the cap plate 151 . That is, the seal gasket 161 may be formed inside the through hole of the cap plate 151 , and the first terminal pole 122 may protrude upward through the through hole of the seal gasket 161 .
- the lower insulating member 162 may be interposed between the first current collecting plate 121 and the cap plate 151 . Also, in some examples, the upper insulating member 162 may be interposed between the first terminal plate 123 and the cap plate 151 . Accordingly, the first terminal 120 may be electrically insulated (separated) from the cap plate 151 .
- an insulating seal gasket 171 may be interposed between the second terminal post 132 and the through hole of the cap plate 151 . That is, the seal gasket 171 may be formed inside the through hole of the cap plate 151 , and the second terminal pole 132 may protrude upward through the through hole 171a of the seal gasket 171 . Also, in some examples, the charging member 180 may be interposed between the second terminal plate 133 and the cap plate 151 . Accordingly, the second terminal 130 may be electrically connected to the cap plate 151 .
- the cap plate 151 may include protrusions 154 and 155 protruding upward with respect to the region where the first terminal 120 and the second terminal 130 are formed.
- the first protrusion 154 of the cap plate 151 may be formed to correspond to the insulating member 162 of the first terminal 120 .
- the first protrusion 154 may be formed along the periphery of the first terminal post 122 of the first terminal 120 , and may protrude upward from the cap plate 151 .
- an insulating member 162 is coupled to the upper portion of the first protrusion 154 , and the insulating member 162 is formed to contact the seal gasket 161 to maintain airtightness.
- the insulating member 162 is formed to surround the lower side of the upper first terminal plate 123 , and the insulating member 162 and the first terminal plate are coupled from the first protrusion 154 of the cap plate 151 . (123) may be firmly coupled.
- the cap plate 151 can secure a thickness in the region where the first terminal 120 is coupled through the first protrusion 154 , thereby preventing deformation or bending of the cap plate 151 . can
- the second protrusion 155 of the cap plate 151 may be formed to correspond to the charging member 180 of the second terminal 130 .
- the second protrusion 155 may be formed along the periphery of the second terminal post 132 of the second terminal 130 , and may protrude upward from the cap plate 151 .
- the charging member 180 is coupled to the upper portion of the second protrusion 155 , and the charging member 180 is formed to contact the seal gasket 171 to maintain airtightness.
- the charging member 180 is formed to surround the lower side of the upper second terminal plate 123 , and the charging member 180 and the second terminal plate are coupled from the second protrusion 155 of the cap plate 151 . (133) can be firmly coupled.
- the second protrusion 155 may be formed by forging the cap plate 151 .
- a groove corresponding to the protrusion height of the second protrusion 155 may be formed in the region of the cap plate 151 positioned under the second protrusion 155 . Also, when the seal gasket 171 is coupled to the corresponding groove, the fastening force of the second terminal 130 to the cap plate 151 may be improved.
- the cap plate 151 can secure a thickness in the region where the second terminal 130 is also coupled through the second protrusion 155 , thereby preventing deformation or bending of the cap plate 151 . can do.
- FIG. 4 is a partial perspective view illustrating an exemplary secondary battery according to an embodiment of the present invention.
- 5 is an exploded perspective view of FIG. 4 ;
- the charging member 180 may be interposed between the cap plate 151 and the positive electrode terminal 130 .
- the charging member 180 may also be referred to as a resistive positive terminal.
- the charging member 180 may include a polymer and a conductive filler.
- the charging member 180 may include polyphenylene sulfide (PPS), polyacetylene (PA), polyphenylene vinylene (PPV), polypyrrole (PPY), polyaniline (PANI), polythiophene (PT), and poly3,4-etylenedioxythiophene (PEDOT).
- a conductive filler including at least any one or a combination of carbon black, carbon fiber, and carbon nanotubes may be dispersedly formed with respect to the polymer including at least one or a combination thereof.
- the electrical resistance of the charging member 180 may be between approximately 1 k ⁇ and approximately 1000 M ⁇ .
- the conductive filler may be omitted.
- the charging member 180 may be black.
- the cap plate 151 and the case 140 may be positively charged. Therefore, an alloy (eg, lithium aluminum (LiAl) alloy) is not formed on the inner surface of the case 140 by the electrolyte containing lithium ions, so that corrosion on the inner surface of the case 140 is prevented.
- an alloy eg, lithium aluminum (LiAl) alloy
- the charging member 180 since the charging member 180 has a relatively high electrical resistance, even if the first terminal 120 of the negative electrode is short-circuited to the case 140 of the positive electrode, the charging member 180 mainly consumes a short-circuit current. will do In some examples, when the first terminal 120 is short-circuited to the case 140 of the positive electrode, the charging member 180 mainly consumes energy of the battery 100 , thereby preventing the secondary battery 100 from igniting. can be prevented
- the charging member 180 is positioned between the cap plate 151 and the second terminal 130 , and the first protrusion 181 inserted into the cap plate 150 and the terminal plate ( A second protrusion 183 surrounding the 133 may be included.
- the first protrusion 181 of the charging member 180 may be coupled in a form that penetrates between the seal gasket 171 and the second protrusion 155 , and the inner surface 182 is the seal gasket 171 . ) and maintain interview contact. Accordingly, the sealing property of the secondary battery 100 may be improved through the charging member 180 and the sealing gasket 171 .
- the second protrusion 183 has a shape that protrudes upward along the edge of the charging member 180 , and the second terminal plate 133 is inserted and accommodated in the inner region of the second protrusion 183 . can do. Also, in this case, since the lower side of the second terminal plate 133 is protected by being surrounded by the charging member 180 , the thickness required for rigidity can be reduced compared to the conventional one. Accordingly, it may be possible to reduce the weight of the secondary battery 100 by reducing the thickness of the second terminal plate 133 .
- the required thickness of the first terminal plate 123 is also reduced. It may be possible to reduce the weight of the secondary battery 100 .
- the present invention provides a secondary battery capable of increasing durability, reinforcing the rigidity of a cap plate, and reducing cell weight.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
Claims (10)
- 전극 조립체;상기 전극 조립체가 수용되는 케이스;상기 케이스에 결합되어 상기 전극 조립체를 밀봉하는 캡 플레이트;상기 전극 조립체에 연결되고 상기 캡 플레이트를 관통하여 노출된 단자; 및상기 캡 플레이트의 상기 단자가 결합되는 영역에는 상기 단자를 향해 돌출되는 돌기가 형성된 이차 전지.
- 제 1 항에 있어서,상기 캡 플레이트의 돌기는 상기 캡 플레이트를 관통하는 상기 단자의 주변을 따라 형성된 이차 전지.
- 제 1 항에 있어서,상기 캡 플레이트와 상기 단자의 사이에 개재된 대전 부재를 포함하는 이차 전지.
- 제 3 항에 있어서,상기 대전 부재는 하부로 돌출되어 상기 캡 플레이트의 돌기 내측과 결합되는 제 1 돌기를 포함하는 이차 전지.
- 제 4 항에 있어서,상기 대전 부재의 제 1 돌기는 상기 캡 플레이트의 돌기 내측에서, 상기 단자가 단자가 관통하는 상기 캡 플레이트의 관통홀 내에 결합되는 이차 전지.
- 제 4 항에 있어서,상기 대전 부재의 제 1 돌기는 상기 단자 또는 상기 단자 주변에 형성된 실링 가스켓과 접촉하는 내면을 포함하는 이차 전지.
- 제 3 항에 있어서,상기 대전 부재는 가장자리를 따라 상부로 돌출된 제 2 돌기를 포함하는 이차 전지.
- 제 7 항에 있어서,상기 대전 부재의 제 2 돌기는 상기 단자의 상부에서 노출되는 단자 플레이트의 측면 하부를 감싸서, 상기 단자 플레이트의 적어도 일부를 수용하는 이차 전지.
- 제 3 항에 있어서,상기 캡 플레이트는 상기 돌기의 하부 영역에 대해 상기 돌기의 높이에 대응하는 홈을 포함하고, 상기 단자에 결합되는 실링 가스켓은 상기 돌기의 하부에서 상기 홈에 결합되는 이차 전지.
- 제 3 항에 있어서,상기 대전 부재는 폴리머와 도전성 필러를 포함하고,상기 폴리머는 PPS(polyphenylene sulfide), PA(polyacetylene), PPV(polyphenylene vinylene), PPY(polypyrrole), PANI(polyaniline), PT(polythiophene) 및 PEDOT(poly3,4-etylenedioxythiophene) 중에서 선택된 어느 하나 또는 이들의 조합을 포함하고,상기 도전성 필러는 카본 블랙, 탄소 섬유 및 탄소 나노 튜브 중에서 선택된 어느 하나 또는 이들의 조합을 포함하는 이차 전지.
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CN202180078136.2A CN116569396A (zh) | 2020-11-19 | 2021-10-22 | 二次电池 |
US18/251,515 US20240006730A1 (en) | 2020-11-19 | 2021-10-22 | Secondary battery |
EP21894911.3A EP4250468A1 (en) | 2020-11-19 | 2021-10-22 | Secondary battery |
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KR1020200155852A KR20220068749A (ko) | 2020-11-19 | 2020-11-19 | 이차 전지 |
KR10-2020-0155852 | 2020-11-19 |
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WO2022108139A1 true WO2022108139A1 (ko) | 2022-05-27 |
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US (1) | US20240006730A1 (ko) |
EP (1) | EP4250468A1 (ko) |
KR (1) | KR20220068749A (ko) |
CN (1) | CN116569396A (ko) |
WO (1) | WO2022108139A1 (ko) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20090081197A (ko) * | 2008-01-23 | 2009-07-28 | 삼성에스디아이 주식회사 | 이차 전지 |
KR20110018260A (ko) * | 2009-08-17 | 2011-02-23 | 에스비리모티브 주식회사 | 이차 전지 |
KR20160042246A (ko) * | 2014-10-07 | 2016-04-19 | 삼성에스디아이 주식회사 | 이차 전지 |
KR20190098494A (ko) * | 2018-02-14 | 2019-08-22 | 삼성에스디아이 주식회사 | 이차 전지 |
KR20200032987A (ko) * | 2018-09-19 | 2020-03-27 | 삼성에스디아이 주식회사 | 이차 전지 |
-
2020
- 2020-11-19 KR KR1020200155852A patent/KR20220068749A/ko active Search and Examination
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2021
- 2021-10-22 EP EP21894911.3A patent/EP4250468A1/en active Pending
- 2021-10-22 US US18/251,515 patent/US20240006730A1/en active Pending
- 2021-10-22 CN CN202180078136.2A patent/CN116569396A/zh active Pending
- 2021-10-22 WO PCT/KR2021/014898 patent/WO2022108139A1/ko active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20090081197A (ko) * | 2008-01-23 | 2009-07-28 | 삼성에스디아이 주식회사 | 이차 전지 |
KR20110018260A (ko) * | 2009-08-17 | 2011-02-23 | 에스비리모티브 주식회사 | 이차 전지 |
KR20160042246A (ko) * | 2014-10-07 | 2016-04-19 | 삼성에스디아이 주식회사 | 이차 전지 |
KR20190098494A (ko) * | 2018-02-14 | 2019-08-22 | 삼성에스디아이 주식회사 | 이차 전지 |
KR20200032987A (ko) * | 2018-09-19 | 2020-03-27 | 삼성에스디아이 주식회사 | 이차 전지 |
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EP4250468A1 (en) | 2023-09-27 |
US20240006730A1 (en) | 2024-01-04 |
KR20220068749A (ko) | 2022-05-26 |
CN116569396A (zh) | 2023-08-08 |
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