WO2022085991A1 - 이차 전지 - Google Patents
이차 전지 Download PDFInfo
- Publication number
- WO2022085991A1 WO2022085991A1 PCT/KR2021/013589 KR2021013589W WO2022085991A1 WO 2022085991 A1 WO2022085991 A1 WO 2022085991A1 KR 2021013589 W KR2021013589 W KR 2021013589W WO 2022085991 A1 WO2022085991 A1 WO 2022085991A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- terminal
- cap plate
- conductive member
- plate
- examples
- 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.)
- Ceased
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
- H01M50/572—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
- H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
-
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- 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
-
- 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
- H01M50/184—Sealing members characterised by their shape or structure
-
- 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
- H01M50/531—Electrode connections inside a battery 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
- H01M50/50—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
- 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
- H01M2200/00—Safety devices for primary or secondary batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- An embodiment of the present invention relates to a secondary battery.
- 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.
- an alloy eg, lithium aluminum (LiAl) alloy
- LiAl lithium aluminum
- an embodiment of the present invention provides a secondary battery in which the positive electrode charging member is not deformed or damaged by an external welding heat source (ie, durability is improved) by forming the positive electrode charging member by a double injection method.
- the positive electrode charging member since the positive electrode charging member has protrusions and grooves, external foreign substances do not flow into the inside of the case and internal foreign substances of the case do not flow out, and the mutual coupling force between the positive electrode charging member and the case is increased.
- An improved secondary battery is provided.
- a secondary battery 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 charging member interposed between the cap plate and the terminal, wherein the charging member includes a conductive member interposed between the cap plate and the terminal and between the conductive member, the cap plate and the terminal. It may include an intervening insulating member.
- the conductive member may include a polymer and a conductive filler, wherein the polymer is polyphenylene sulfide (PPS), polyacetylene (PA), polyphenylene vinylene (PPV), polypyrrole (PPY), polyaniline (PANI), polythiophene (PT), or PEDOT. (poly3,4-etylenedioxythiophene), and the conductive filler may include carbon black, carbon fibers, or carbon nanotubes.
- PPS polyphenylene sulfide
- PA polyacetylene
- PV polyphenylene vinylene
- PY polypyrrole
- PANI polyaniline
- PT polythiophene
- PEDOT PEDOT
- the electrical resistance of the conductive member may be 1 k ⁇ to 1000 M ⁇ .
- the insulating member may include a polymer, wherein the polymer may include polycarbonate (PC), polyphenylene sulfide (PPS), polysulfone (PSF), polyethersulfone (PES), polyamide imide (PAI), or polyimide (PI).
- PC polycarbonate
- PPS polyphenylene sulfide
- PSF polysulfone
- PES polyethersulfone
- PAI polyamide imide
- PI polyimide
- the heat resistance temperature of the insulating member may be 120 °C to 300 °C.
- the terminal may include a terminal pole electrically connected to the electrode assembly and penetrating the cap plate, and a terminal plate coupled to the terminal pole and positioned on the cap plate, wherein the conductive member includes the cap plate; It may contact the terminal pole and the terminal plate.
- the insulating member may contact the conductive member, the cap plate, and the terminal plate.
- the device may further include a seal gasket interposed between the terminal pole and the cap plate, wherein the conductive member may contact the seal gasket.
- the cap plate may further include a first groove, and the conductive member may further include a first protrusion coupled to the first groove.
- the cap plate may further include a second recess, the conductive member may further include a second projection coupled to the second recess, and the insulating member may include a first projection coupled to the second recess. may include more.
- the cap plate may further include a first protrusion
- the conductive member may further include a first concave groove coupled to the first protrusion
- the conductive member may further include a second recess, and the insulating member may further include a second protrusion coupled to the second recess.
- an alloy eg, lithium aluminum (LiAl) alloy
- LiAl lithium aluminum
- the embodiment of the present invention can provide a secondary battery in which the positive electrode charging member is not deformed or damaged by an external welding heat source (ie, durability is improved) by forming the positive electrode charging member by a double injection method.
- the positive electrode charging member since the positive electrode charging member has protrusions and grooves, external foreign substances do not flow into the inside of the case and internal foreign substances of the case do not flow out, and the mutual coupling force between the positive electrode charging member and the case is increased.
- An improved secondary battery may be provided.
- FIG. 1 is a perspective view illustrating an exemplary secondary battery according to an embodiment of the present invention.
- FIG. 2A and 2B are cross-sectional views illustrating the exemplary secondary battery shown in FIG. 1 .
- 3A and 3B are perspective and cross-sectional views illustrating an exemplary positive electrode terminal and an exemplary positive electrode charging member of an exemplary secondary battery according to an embodiment of the present invention.
- 4A, 4B, and 4C are a top perspective view, a top plan view, and a bottom plan view illustrating an exemplary positive electrode charging member of an exemplary secondary battery according to an embodiment of the present invention.
- 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”.
- the secondary batteries 100 and 200 include electrode assemblies 110 and 210 (refer to FIGS. 2A and 2B ), a first terminal 120 , a second terminal 130 , a can 140 , and a cap assembly. (150).
- first and second terminals 120 may penetrate through the cap assembly 150 and be exposed upwardly.
- first terminal 120 may include or be referred to as a negative terminal
- second terminal 130 may include or be referred to as a positive terminal.
- the upper insulating member 163 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 to each other (ie, connected), and accordingly, the can 140 may be charged with, for example, a positive electrode (or a negative electrode). .
- the can 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 can 140 has 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.
- can 140 may include or be referred to as a case, housing, or enclosure.
- the cap assembly 150 may include a cap plate 151 , a plug 152 , and a safety vent 153 . This will be explained again below.
- the secondary battery 100 may include the electrode assembly 110 in which the winding axis is in a horizontal direction (ie, a direction substantially parallel to the longitudinal direction of the cap assembly 150 ), as shown in FIG. 2B .
- the secondary battery 200 may include the electrode assembly 210 having a winding axis in a vertical direction (ie, a direction substantially perpendicular 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 stack 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
- the second electrode plate 112 may serve as an anode.
- the reverse is also possible.
- 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.
- the first terminal 120 and the second terminal 130 electrically connected to the first electrode plate 111 and the second electrode plate 112, respectively, may be positioned at both ends of the electrode assembly 110 as described above. there is.
- the electrode assembly 110 may be accommodated in the can 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).
- 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.
- the first current collecting plate 121 may be formed in an approximately ' ⁇ ' shape, and a terminal hole 121a may be formed in the upper portion.
- the first terminal pole 122 may be inserted into the terminal hole 121a to be riveted and/or welded.
- 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 electrically connected to the first current collector plate 121 under the cap plate 151 .
- the first terminal pole 122 protrudes and extends to an upper portion of the cap plate 151 by a predetermined length, and at the same time, a flange for preventing the first terminal pole 122 from falling out of the lower portion of the cap plate 151 . (122a) may be included.
- the region positioned below the flange 122a of the first terminal post 122 may be inserted into the first terminal hole 121a of the first current collecting plate 121 and then riveted and/or welded.
- 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. In some examples, an interface between the first terminal pole 122 exposed upward and the first terminal plate 123 may be welded to each other.
- 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 post 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 ' ⁇ ' shape, and a terminal hole 131a may be formed in the upper portion.
- the second terminal pole 132 is fitted and coupled to the terminal hole 131a.
- 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 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 .
- the region positioned under the flange 132a of the second terminal post 132 may be inserted into the second terminal hole 131a of 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 in 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, the boundary region of the second terminal post 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 can 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 can 140 .
- cap assembly 150 may include or be referred to as cap plate 151 .
- the cap plate 151 seals the space of the can 140 , and may be formed of the same material as the can 140 .
- the cap plate 151 may be coupled to the can 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 can 140 may have the same polarity.
- the cap plate 151 may include a first through hole 151a through which the first terminal pillar 122 passes and a second through hole 151b through which the second terminal pillar 132 passes. .
- 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 in the can 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 can 140 becomes higher than the set pressure, the high-pressure gas inside can be discharged to the outside.
- the safety vent After the 153 is coupled to the vent hole 151d, it may be laser-welded to the cap plate 151 .
- an insulating sealing gasket 161 may be interposed between the first terminal post 122 and the first through hole 151a of the cap plate 151 .
- the lower insulating member 162 may be interposed between the first current collecting plate 121 and the cap plate 151 .
- the upper insulating member 163 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 second through hole 151b of the cap plate 151 .
- the lower insulating member 172 may be interposed between the second current collecting plate 131 and the cap plate 151 .
- 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 secondary battery 200 shown in FIG. 2B will be described.
- the secondary battery 200 has a structure different from that of the secondary battery 100 of the above-described embodiment in the electrode assembly 220 and the connection relationship between the electrode assembly 220 and the terminals 120 and 130 .
- a first electrode tab 211a may be interposed between the electrode assembly 210 and the first terminal 120
- a second electrode tab 212a may be interposed between the electrode assembly 210 and the second terminal 130 .
- the first electrode tab 211a may extend from the upper end of the electrode assembly 210 toward the lower end of the first terminal post 122 to be electrically connected to or welded to the first terminal post 122 .
- the second electrode tab 212a may extend from the upper end of the electrode assembly 210 toward the lower end of the second terminal post 132 to be electrically connected to or welded to the second terminal post 132 .
- the first electrode tab 211a may be the first uncoated portion itself to which the first active material is not applied among the first electrode plates 211 of the electrode assembly 210 or a separate member connected to the first uncoated portion.
- the material of the first uncoated part is the same as that of the first electrode plate, and the material of the separate member may be one selected from nickel, nickel alloy, copper, copper alloy, aluminum, aluminum alloy, and equivalents thereof.
- the second electrode tab 212a is the second uncoated portion itself to which the second active material is not applied among the second electrode plates 212 of the electrode assembly 210 , or a separate portion connected to the second uncoated portion. may be the absence of
- the material of the second uncoated portion is the same as that of the second electrode plate, and the material of the separate member may be one selected from aluminum, aluminum alloy, nickel, nickel alloy, copper, copper alloy, and equivalents thereof.
- 3A and 3B are perspective and cross-sectional views illustrating an exemplary positive electrode terminal 130 and an exemplary positive electrode charging member 180 of the exemplary secondary battery 100 according to an embodiment of the present invention. This structure may be applied to the exemplary secondary battery 200 in the same or similar manner.
- the positive charging member 180 may be interposed between the cap plate 151 and the positive terminal 130 .
- the charging member 180 includes a conductive member 181 interposed between the cap plate 151 and the positive terminal 130 , the conductive member 181 , the cap plate 151 , and the positive terminal 130 . may include an insulating member 183 interposed therebetween.
- the conductive member 181 may include a polymer and a conductive filler.
- the polymer may include polyphenylene sulfide (PPS), polyacetylene (PA), polyphenylene vinylene (PPV), polypyrrole (PPY), polyaniline (PANI), polythiophene (PT), or poly3,4-etylenedioxythiophene (PEDOT).
- the conductive filler may include carbon black, carbon fibers, or carbon nanotubes.
- the electrical resistance of the conductive member 181 may be between approximately 1 k ⁇ and approximately 1000 M ⁇ . In some examples, when the polymer itself is conductive, the conductive filler may be omitted. In some examples, when the conductive filler is dispersed in the polymer, the conductive member 181 may be black.
- the insulating member 183 includes a polymer, wherein the polymer includes polycarbonate (PC), polyphenylene sulfide (PPS), polysulfone (PSF), polyethersulfone (PES), polyamide imide (PAI), or polyimide (PI). can do.
- the heat resistance temperature of the insulating member 183 may be about 120° C. to about 300° C. higher than the heat resistance temperature of the conductive member 181 .
- the insulating member 183 may be transparent or opaque.
- the conductive member 181 may be first formed by an injection mold, and then the insulating member 183 may be formed by the injection mold while surrounding the conductive member 181 .
- the charging member 180 may be formed by a double injection method.
- the cap plate 151 and the can 140 may be positively charged. Therefore, an alloy (eg, lithium aluminum (LiAl) alloy) is not formed on the inner surface of the can 140 by the electrolyte containing lithium ions, so that corrosion on the inner surface of the can 140 is prevented.
- the positive charging member 180 since the positive charging member 180 has a relatively high electrical resistance, even if the negative terminal 120 is short-circuited to the positive can 140 , the positive charging member 180 mainly consumes a short-circuit current. In some examples, when the negative terminal 120 is short-circuited to the can 140 of the positive electrode, the positive charging member 180 mainly consumes energy of the battery 100 , thereby preventing the battery 100 from igniting. there is.
- the insulating member 183 having a relatively high heat resistance temperature wraps the conductive member 181 , the conductive member 181 is not deformed or damaged by the external welding heat source.
- the plug 152 may be welded to the cap plate 151 , and the heat generated at this time is applied to the insulating member 183 . is blocked so that it is not transmitted to the conductive member 181 . Accordingly, the positive electrode charging member 180 is not damaged or deformed by heat generated during the welding process of the plug 152 positioned between the safety vent 153 and the positive electrode terminal 130 .
- the conductive member 181 may contact the cap plate 151 , the terminal pole 132 , and the terminal plate 133 . In some examples, the conductive member 181 may contact the flange 132a. In some examples, the conductive member 181 may further contact the seal gasket 171 . In some examples, the insulating member 183 may contact the cap plate 151 , the conductive member 181 , and the terminal plate 133 .
- the cap plate 151 may further include a first recess 154a formed on the upper surface, and the conductive member 181 further includes a first protrusion 181a coupled to the first recess 154a. can do.
- the cap plate 151 may further include a second groove 154b formed on the upper surface as an outside of the first groove 154a, and the conductive member 181 is coupled to the second groove 154b.
- a second protrusion 181b may be further included, and the insulating member 183 may further include a first protrusion 183a coupled to the second concave groove 154b.
- the second protrusion 181b of the conductive member 181 and the first protrusion 183a of the insulating member 183 are in contact with each other and are coupled to the second recess 154b of the cap plate 151 at the same time can be
- the cap plate 151 may further include a first protrusion 155a formed between the first recess 154a and the second recess 154b, and the conductive member 181 may include the cap plate 151 .
- ) may further include a first groove (181c) coupled to the first projection (155a).
- the conductive member 181 may further include a second recess 181d formed on the upper surface, and the insulating member 183 further includes a second protrusion 183b coupled to the second recess 181d. can do.
- the insulating member 183 may further include a third protrusion 183c formed on the upper surface, and the third protrusion 183c may contact the outer surface of the terminal plate 133 .
- the first and second concave grooves 154a and 154b and the first protrusion 155a are provided on the cap plate 151
- the first and second protrusions 181a and 181b and the first protrusion 181b and the first protrusion 181b are provided on the conductive member 181 .
- the groove 181c is provided
- the first protrusion 183a is provided on the insulating member 183 , so that the movement path of the foreign material is lengthened, so that the foreign material does not flow into the inside of the can 140 and the inside of the can 140 . Foreign matter is not leaked to the outside.
- a second concave groove 181d is provided on the upper surface of the conductive member 181
- a second protrusion 183b is provided on the lower surface of the insulating member 183 to be coupled to each other, so that the conductive member 181 and the insulating member are provided. (183) can improve the mutual bonding force.
- the cap plate 151 may further include a second protrusion 155b formed on a lower surface
- the lower insulating member 172 may further include a recess 172a formed on the upper surface.
- the groove 172a of the lower insulating member 172 is coupled to the second protrusion 155b of the cap plate 151 to improve the coupling force between the cap plate 151 and the lower insulating member 172 . there is.
- FIGS. 4A, 4B, and 4C are a top perspective view, a top plan view, and a bottom plan view illustrating an exemplary positive electrode charging member 180 of an exemplary secondary battery 100 according to an embodiment of the present invention.
- the positive charging member 180 may be applied in the same or similar manner to the above-described secondary battery 200 .
- the positive electrode charging member 180 may further include a through hole 182 formed in the center of the conductive member 181 .
- the terminal pole 132 may pass through the through hole 182 of the conductive member 181 and may contact the inner surface of the through hole 182 .
- the insulating member 183 may further include fourth protrusions 183d formed on opposite sides thereof.
- the fourth protrusion 183d may have a shape protruding inward from the third protrusion 183c (ie, the perimeter of the square) of the insulating member 183 .
- the fourth protrusion 183d of the insulating member 183 is coupled to a recess (not shown) formed on the lower surface of the terminal plate 133 to prevent mutual rotation of the terminal plate 133 and the insulating member 183 . do.
- the first concave groove 181c formed in the conductive member 181 may have a substantially rectangular line shape.
- a first protrusion 181a may be formed inside the first concave groove 181c, and a second protrusion 181b may be formed outside the first concave groove 181c.
- the first protrusion 183a of the insulating member 183 may have a substantially rectangular line shape by wrapping the outside of the second protrusion 181b of the conductive member 181 .
- the positive charging member 180 having such a structure is coupled to the first and second recesses 154a and 154b and the first protrusion 155a of the cap plate 151, so that the positive charging member 180 is formed on the cap plate 151. 180) can be prevented from rotating.
Landscapes
- 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)
Abstract
Description
Claims (12)
- 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 플레이트와 상기 단자의 사이에 개재된 대전 부재를 포함하되, 상기 대전 부재는 상기 캡 플레이트와 상기 단자의 사이에 개재된 도전성 부재와, 상기 도전성 부재, 상기 캡 플레이트 및 상기 단자의 사이에 개재된 절연성 부재를 포함하는, 이차 전지.
- 제 1 항에 있어서,상기 도전성 부재는 폴리머와 도전성 필러를 포함하되, 상기 폴리머는 PPS(polyphenylene sulfide), PA(polyacetylene), PPV(polyphenylene vinylene), PPY(polypyrrole), PANI(polyaniline), PT(polythiophene) 또는 PEDOT(poly3,4-etylenedioxythiophene)을 포함하고, 상기 도전성 필러는 카본블랙, 탄소섬유 또는 탄소나노튜브를 포함하는, 이차 전지.
- 제 1 항에 있어서,상기 도전성 부재의 전기 저항은 1kΩ 내지 1000MΩ인, 이차 전지.
- 제 1 항에 있어서,상기 절연성 부재는 폴리머를 포함하되, 상기 폴리머는 PC(polycarbonate), PPS(polyphenylene sulfide), PSF(polysulfone), PES(polyethersulfone), PAI(polyamide imide) 또는 PI(polyimide)를 포함하는, 이차 전지.
- 제 1 항에 있어서,상기 절연성 부재의 내열 온도는 120℃ 내지 300℃인, 이차 전지.
- 제 1 항에 있어서,상기 단자는 상기 전극 조립체에 전기적으로 연결되고 상기 캡 플레이트를 관통하는 단자 기둥과, 상기 단자 기둥에 결합되고 상기 캡 플레이트 상에 위치되는 단자 플레이트를 포함하되, 상기 도전성 부재는 상기 캡 플레이트, 상기 단자 기둥 및 상기 단자 플레이트에 접촉하는, 이차 전지.
- 제 6 항에 있어서,상기 절연성 부재는 상기 도전성 부재, 상기 캡 플레이트 및 상기 단자 플레이트에 접촉하는, 이차 전지.
- 제 6 항에 있어서,상기 단자 기둥과 상기 캡 플레이트의 사이에 개재된 시일 가스켓을 더 포함하되, 상기 도전성 부재는 상기 시일 가스켓에 접촉하는, 이차 전지.
- 제 1 항에 있어서,상기 캡 플레이트는 제1요홈을 더 포함하되, 상기 도전성 부재는 상기 제1요홈에 결합되는 제1돌기를 더 포함하는, 이차 전지.
- 제 1 항에 있어서,상기 캡 플레이트는 제2요홈을 더 포함하되, 상기 도전성 부재는 상기 제2요홈에 결합되는 제2돌기를 더 포함하고, 상기 절연성 부재는 상기 제2요홈에 결합되는 제1돌기를 더 포함하는, 이차 전지.
- 제 1 항에 있어서,상기 캡 플레이트는 제1돌기를 더 포함하되, 상기 도전성 부재는 상기 제1돌기에 결합되는 제1요홈을 더 포함하는, 이차 전지.
- 제 1 항에 있어서,상기 도전성 부재는 제2요홈을 더 포함하되, 상기 절연성 부재는 상기 제2요홈에 결합되는 제2돌기를 더 포함하는, 이차 전지.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202180031870.3A CN115461929B (zh) | 2020-10-23 | 2021-10-05 | 二次电池 |
| US17/999,702 US12580285B2 (en) | 2020-10-23 | 2021-10-05 | Secondary battery |
| EP21883063.6A EP4235948A4 (en) | 2020-10-23 | 2021-10-05 | SECONDARY BATTERY |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020200138684A KR20220054130A (ko) | 2020-10-23 | 2020-10-23 | 이차 전지 |
| KR10-2020-0138684 | 2020-10-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022085991A1 true WO2022085991A1 (ko) | 2022-04-28 |
Family
ID=81290665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2021/013589 Ceased WO2022085991A1 (ko) | 2020-10-23 | 2021-10-05 | 이차 전지 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US12580285B2 (ko) |
| EP (1) | EP4235948A4 (ko) |
| KR (1) | KR20220054130A (ko) |
| CN (1) | CN115461929B (ko) |
| WO (1) | WO2022085991A1 (ko) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115149164A (zh) * | 2022-07-15 | 2022-10-04 | 东莞正力新能电池技术有限公司 | 一种塑胶件及其制备方法与电池盖体组件 |
| CN115173003A (zh) * | 2022-07-19 | 2022-10-11 | 东莞凯德新能源有限公司 | 锂离子电池及电池组 |
| CN116014317A (zh) * | 2023-02-09 | 2023-04-25 | 深圳海润新能源科技有限公司 | 端盖组件、储能装置及用电设备 |
| EP4191760A1 (en) * | 2021-12-03 | 2023-06-07 | Samsung SDI Co., Ltd. | Secondary battery |
| WO2024077491A1 (zh) * | 2022-10-11 | 2024-04-18 | 宁德时代新能源科技股份有限公司 | 壳组件、电池单体、电池及用电装置 |
| EP4336629A3 (en) * | 2022-09-07 | 2024-09-11 | SK On Co., Ltd. | Battery cell |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024164250A1 (zh) * | 2023-02-09 | 2024-08-15 | 深圳海润新能源科技有限公司 | 端盖组件、储能装置及用电设备 |
| CN222813744U (zh) * | 2024-06-18 | 2025-04-29 | 惠州亿纬动力电池有限公司 | 电池顶盖以及方形电池 |
| JP2026019303A (ja) * | 2024-07-26 | 2026-02-05 | プライムプラネットエナジー&ソリューションズ株式会社 | 蓄電デバイス及び蓄電デバイスの製造方法 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110137005A (ko) * | 2010-06-16 | 2011-12-22 | 에스비리모티브 주식회사 | 이차 전지 |
| KR20140078812A (ko) * | 2012-12-18 | 2014-06-26 | 주식회사 엘지화학 | 밀봉성이 향상된 캡 어셈블리 및 이를 포함하는 전지셀 |
| US20140178744A1 (en) * | 2011-08-29 | 2014-06-26 | Byd Company Limited | Battery terminal, battery cover plate assembly, battery and battery pack |
| KR20150144600A (ko) * | 2014-06-17 | 2015-12-28 | 삼성에스디아이 주식회사 | 이차 전지 |
| KR20170000442A (ko) * | 2015-06-23 | 2017-01-03 | 삼성에스디아이 주식회사 | 이차 전지 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5271498B2 (ja) | 2007-01-26 | 2013-08-21 | 三菱重工業株式会社 | リチウム二次電池及び組電池 |
| KR101036070B1 (ko) | 2010-01-26 | 2011-05-19 | 에스비리모티브 주식회사 | 이차 전지 |
| US10367186B2 (en) | 2013-01-18 | 2019-07-30 | Samsung Sdi Co., Ltd. | Secondary battery including an insulating member |
| KR20150045737A (ko) | 2013-10-21 | 2015-04-29 | 삼성에스디아이 주식회사 | 배터리 모듈 |
| KR102226513B1 (ko) * | 2014-06-02 | 2021-03-11 | 삼성에스디아이 주식회사 | 이차 전지 |
| KR102408823B1 (ko) | 2015-08-27 | 2022-06-13 | 삼성에스디아이 주식회사 | 이차 전지 |
| KR102524471B1 (ko) * | 2015-09-18 | 2023-04-24 | 삼성에스디아이 주식회사 | 이차전지 |
| KR102578862B1 (ko) * | 2016-03-22 | 2023-09-13 | 삼성에스디아이 주식회사 | 이차전지 |
| KR102611656B1 (ko) * | 2016-08-30 | 2023-12-08 | 삼성에스디아이 주식회사 | 이차 전지 |
| CN108695451B (zh) | 2017-04-07 | 2021-02-09 | 宁德时代新能源科技股份有限公司 | 二次电池的顶盖组件以及二次电池 |
| KR102454791B1 (ko) * | 2017-06-13 | 2022-10-14 | 삼성에스디아이 주식회사 | 양극 단자와 멤브레인 일체형 캡 플레이트를 갖는 이차 전지 |
| CN111799404B (zh) * | 2017-08-30 | 2021-05-07 | 宁德时代新能源科技股份有限公司 | 二次电池的顶盖组件、二次电池以及电池模组 |
| CN110034269B (zh) * | 2018-01-11 | 2024-04-05 | 宁德时代新能源科技股份有限公司 | 电池顶盖组件、二次电池及电池模组 |
-
2020
- 2020-10-23 KR KR1020200138684A patent/KR20220054130A/ko active Pending
-
2021
- 2021-10-05 WO PCT/KR2021/013589 patent/WO2022085991A1/ko not_active Ceased
- 2021-10-05 US US17/999,702 patent/US12580285B2/en active Active
- 2021-10-05 EP EP21883063.6A patent/EP4235948A4/en active Pending
- 2021-10-05 CN CN202180031870.3A patent/CN115461929B/zh active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110137005A (ko) * | 2010-06-16 | 2011-12-22 | 에스비리모티브 주식회사 | 이차 전지 |
| US20140178744A1 (en) * | 2011-08-29 | 2014-06-26 | Byd Company Limited | Battery terminal, battery cover plate assembly, battery and battery pack |
| KR20140078812A (ko) * | 2012-12-18 | 2014-06-26 | 주식회사 엘지화학 | 밀봉성이 향상된 캡 어셈블리 및 이를 포함하는 전지셀 |
| KR20150144600A (ko) * | 2014-06-17 | 2015-12-28 | 삼성에스디아이 주식회사 | 이차 전지 |
| KR20170000442A (ko) * | 2015-06-23 | 2017-01-03 | 삼성에스디아이 주식회사 | 이차 전지 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4235948A4 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4191760A1 (en) * | 2021-12-03 | 2023-06-07 | Samsung SDI Co., Ltd. | Secondary battery |
| US12573696B2 (en) | 2021-12-03 | 2026-03-10 | Samsung Sdi Co., Ltd. | Secondary battery |
| CN115149164A (zh) * | 2022-07-15 | 2022-10-04 | 东莞正力新能电池技术有限公司 | 一种塑胶件及其制备方法与电池盖体组件 |
| CN115173003A (zh) * | 2022-07-19 | 2022-10-11 | 东莞凯德新能源有限公司 | 锂离子电池及电池组 |
| EP4336629A3 (en) * | 2022-09-07 | 2024-09-11 | SK On Co., Ltd. | Battery cell |
| WO2024077491A1 (zh) * | 2022-10-11 | 2024-04-18 | 宁德时代新能源科技股份有限公司 | 壳组件、电池单体、电池及用电装置 |
| CN116014317A (zh) * | 2023-02-09 | 2023-04-25 | 深圳海润新能源科技有限公司 | 端盖组件、储能装置及用电设备 |
| US12046762B1 (en) | 2023-02-09 | 2024-07-23 | Shenzhen Hithium Energy Storage Technology Co., Ltd. | End cover assembly, energy-storage device, and electricity-consumption device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4235948A4 (en) | 2025-06-18 |
| EP4235948A1 (en) | 2023-08-30 |
| CN115461929B (zh) | 2025-05-13 |
| KR20220054130A (ko) | 2022-05-02 |
| CN115461929A (zh) | 2022-12-09 |
| US12580285B2 (en) | 2026-03-17 |
| US20230299439A1 (en) | 2023-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2022085991A1 (ko) | 이차 전지 | |
| WO2021241939A1 (ko) | 이차전지 | |
| WO2021020743A1 (ko) | 이차 전지 | |
| WO2020235916A1 (ko) | 이차 전지 | |
| WO2022203196A1 (ko) | 이차 전지 | |
| WO2018155853A2 (ko) | 대칭형 멀티탭을 갖는 이차 전지 | |
| WO2021162330A1 (ko) | 전극 조립체 및 이를 포함하는 이차전지 | |
| WO2018043879A1 (ko) | 이차 전지 | |
| WO2018212447A1 (ko) | 이차 전지 | |
| WO2018216902A1 (ko) | 이차 전지 | |
| WO2022108244A1 (ko) | 이차 전지 | |
| WO2019050180A1 (ko) | 이차 전지 | |
| WO2018164389A1 (ko) | 이차 전지 | |
| WO2023113424A1 (ko) | 이차 전지 | |
| WO2023085538A1 (ko) | 이차 전지 | |
| WO2023080361A1 (ko) | 이차 전지 | |
| EP4354599A1 (en) | Secondary battery | |
| WO2017222199A1 (ko) | 이차 전지 | |
| WO2022108139A1 (ko) | 이차 전지 | |
| WO2022035043A1 (ko) | 이차 전지 | |
| WO2022196938A1 (ko) | 이차 전지 | |
| KR20210147593A (ko) | 이차 전지 | |
| WO2025121548A1 (ko) | 이차전지 | |
| WO2018012788A1 (ko) | 이차 전지 | |
| WO2023085537A1 (ko) | 이차 전지 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21883063 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 2021883063 Country of ref document: EP Effective date: 20230523 |
|
| WWG | Wipo information: grant in national office |
Ref document number: 202180031870.3 Country of ref document: CN |
|
| WWG | Wipo information: grant in national office |
Ref document number: 17999702 Country of ref document: US |