WO2024117876A1 - 이차 전지 - Google Patents
이차 전지 Download PDFInfo
- Publication number
- WO2024117876A1 WO2024117876A1 PCT/KR2023/019726 KR2023019726W WO2024117876A1 WO 2024117876 A1 WO2024117876 A1 WO 2024117876A1 KR 2023019726 W KR2023019726 W KR 2023019726W WO 2024117876 A1 WO2024117876 A1 WO 2024117876A1
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- WO
- WIPO (PCT)
- Prior art keywords
- frame
- secondary battery
- electrode assembly
- area
- folding
- 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
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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
- H01M50/102—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
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- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/114—Single butt joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/303—Particular design of joint configurations the joint involving an anchoring effect
- B29C66/3032—Particular design of joint configurations the joint involving an anchoring effect making use of protrusions or cavities belonging to at least one of the parts to be joined
- B29C66/30325—Particular design of joint configurations the joint involving an anchoring effect making use of protrusions or cavities belonging to at least one of the parts to be joined making use of cavities belonging to at least one of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
- B29C66/543—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow articles
- B29C66/5432—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow articles joining hollow covers and hollow bottoms to open ends of container bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
- B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
- B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
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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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
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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
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/154—Lid or cover comprising an axial bore for receiving a central current collector
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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
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
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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
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
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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
- H01M50/183—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
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
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- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
- B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
- B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
- B29K2705/02—Aluminium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
- B29K2705/08—Transition metals
- B29K2705/12—Iron
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29L2012/00—Frames
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3468—Batteries, accumulators or fuel cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a secondary battery including an electrode assembly and an exterior sheet.
- types of secondary batteries include nickel cadmium batteries, nickel hydrogen batteries, lithium ion batteries, and lithium ion polymer batteries. These secondary batteries are used not only for small products such as digital cameras, P-DVDs, MP3Ps, mobile phones, PDAs, portable game devices, power tools, and e-bikes, but also for large products requiring high output such as electric vehicles and hybrid vehicles, as well as for surplus power generation. It is also applied and used in power storage devices that store power or renewable energy and backup power storage devices.
- the electrode active material slurry is first applied to the positive electrode current collector and the negative electrode current collector to manufacture the positive and negative electrodes, and then an electrode assembly of a predetermined shape is formed by interposing a separator on both sides. form Then, the electrode assembly is stored in the battery case, and the electrolyte is injected and sealed.
- Secondary batteries are classified into pouch type and can type, etc., depending on the material of the case that accommodates the electrode assembly.
- the pouch type accommodates the electrode assembly in a pouch made of flexible polymer material.
- the can type accommodates the electrode assembly in a case made of materials such as metal or plastic.
- a pouch-type battery case is manufactured by performing press processing on a flexible laminate sheet to form a cup portion. Then, when the cup portion is formed, the electrode assembly is stored inside the cup portion and the sides are sealed to manufacture a secondary battery.
- drawing forming is performed by inserting a laminated sheet into a forming device such as a press equipment and applying pressure to the laminated sheet with a punch to stretch the laminated sheet.
- a portion of the sealing portion is double side folded (DSF) to form a wing folding portion.
- DSF double side folded
- One problem that the present invention seeks to solve is to provide a secondary battery that has no thickness restrictions on the electrode assembly and does not require separate cup molding.
- a secondary battery includes an electrode assembly; a frame surrounding the electrode assembly to accommodate the electrode assembly and having an insulating material; and a pair of exterior sheets sealed with the frame on both sides of the frame to cover the electrode assembly.
- a groove facing the outside of the frame may be formed in the frame to increase the sealing area between the exterior sheet and the frame.
- the height of the electrode assembly may correspond to the height of the frame.
- the groove may extend along the frame.
- the groove may be formed of a plurality of lines parallel to each other.
- An opening through which an electrode lead connected to the electrode assembly passes may be formed in the frame.
- An insulating member surrounding a portion of the electrode lead may be sealed between the pair of exterior sheets on the outside of the opening.
- At least one vent hole located on a side different from the side where the opening is formed may be formed in the frame.
- the frame includes an inner peripheral surface facing the electrode assembly; an outer circumferential surface located on the opposite side of the inner circumferential surface; And it may include a connection surface connecting the inner circumferential surface and the outer circumferential surface.
- a thickness between the outer circumferential surface and the inner circumferential surface may be smaller than the height of the frame.
- the exterior sheet includes a cover area that covers the electrode assembly; and an edge area located around the cover area and sealed with the connection surface.
- the cover area and edge area may form the same plane.
- At least one of the pair of exterior sheets may further include a folding area that is folded at the edge area and sealed with the outer peripheral surface.
- the folding areas of the pair of exterior sheets may not overlap each other.
- At least one vent hole covered by the folding area may be formed in the frame.
- the exterior sheet may further include a sealing area connected to the edge area, and the sealing areas of the pair of exterior sheets may be sealed to each other.
- An opening through which an electrode lead connected to the electrode assembly passes is formed in the frame, and the sealing area may cover the opening.
- the sealing area of at least one of the pair of exterior sheets includes a first folding portion folded from the edge area toward the outer peripheral surface; and a second folding part folded from the first folding part in a direction opposite to the folding direction of the first folding part.
- the first folding part may be sealed on the outer circumferential surface.
- a large sealing area between the frame and the exterior sheet can be secured, thereby strengthening the sealing force between the frame and the exterior sheet.
- the exterior quality of the secondary battery can be improved.
- vent holes can be formed in the frame, it is possible to design more freely with regard to the formation location, size, number, etc. of the vent holes. As a result, gases and flames generated by fires in secondary batteries can be vented to the intended location and direction, and the spread of flames or thermal runaway between secondary batteries can be delayed.
- Figure 1 is a perspective view showing the appearance of a secondary battery according to an embodiment of the present invention.
- Figure 2 is an exploded perspective view of a secondary battery according to an embodiment of the present invention.
- FIG. 3 is a cross-sectional view taken along line A-A' of FIG. 1.
- Figure 4 is a cross-sectional view taken along line B-B' in Figure 1.
- Figure 5 is a plan view of a frame according to another embodiment of the present invention.
- Figure 6 is a side view of a frame according to another embodiment of the present invention.
- Figure 7 is a partial cross-sectional view taken along line C-C' of Figure 5.
- FIG. 1 is a perspective view showing the exterior of a secondary battery according to an embodiment of the present invention
- FIG. 2 is an exploded perspective view of a secondary battery according to an embodiment of the present invention
- FIG. 3 is a line A-A' of FIG. 1. This is a cross-sectional view
- FIG. 4 is a cross-sectional view taken along line B-B' of FIG. 1.
- the secondary battery 1 includes an electrode assembly 10, a frame 20 surrounding the electrode assembly 10 to accommodate the electrode assembly 10, and the electrode assembly 10. ) may include a pair of exterior sheets 30 that are sealed with the frame 20 on both sides of the frame 20 to cover the area.
- the electrode assembly 10 may include an anode, a cathode, and a separator interposed between the anode plate and the cathode plate to insulate them.
- the type of electrode assembly 10 is not limited.
- the electrode assembly 10 may be a stacked electrode assembly in which an anode and a cathode are alternately stacked with a separator in between.
- the electrode assembly 10 may be a jelly roll-type electrode assembly in which a sheet-shaped anode and a cathode are wound together with a separator in between.
- the electrode assembly 10 may be provided with an electrode tab protruding in the direction of its overall length.
- the electrode tab may include a positive electrode tab connected to the positive electrode and a negative electrode tab connected to the negative electrode.
- the electrode lead 12 may be connected to the electrode assembly 10.
- the electrode lead 12 may be connected to the electrode tab of the electrode assembly 10.
- electrode leads 12 may be welded to the electrode tabs.
- a pair of electrode leads 12 may be provided, and the pair of electrode leads 12 may include a positive electrode lead connected to the positive electrode tab and a negative electrode lead connected to the negative electrode tab.
- the insulating member 13 may surround a portion of the electrode lead 12.
- the insulating member 13 may include an insulating tape.
- the insulating member 13 may insulate the electrode lead 12 and the exterior sheet 30.
- a pair of electrode leads 12 may extend parallel to each other from one end of the electrode assembly 10. However, it is not limited to this, and it is also possible for a pair of electrode leads 12 to extend in opposite directions from both ends of the electrode assembly 10.
- the frame 20 may have an insulating material.
- the frame 20 may be made of plastic. As a result, the electrode assembly 10 and the frame 20 can maintain insulation.
- the frame 20 may have higher rigidity than the exterior sheet 30.
- the frame 20 may have a closed loop shape extending along the circumference of the electrode assembly 10 . That is, the frame 20 may form an internal space in which the electrode assembly 10 is accommodated, and the internal space is located on both sides with respect to the height direction (for example, the direction parallel to the Z-axis direction) of the electrode assembly 10. can be opened as
- the frame 20 may have a substantially square frame shape.
- the frame 20 has a pair of long sides parallel to the full-length direction of the electrode assembly 10 (e.g., a direction parallel to the Y axis) and a pair of long sides parallel to the full-width direction of the electrode assembly 10 (e.g., It may include a pair of short sides parallel to the X-axis (direction parallel to the X-axis). That is, the frame 20 may include four sides.
- the frame 20 is preferably formed as a single piece, but is not limited thereto.
- the height of the electrode assembly 10 and the height h of the frame 20 may correspond to each other.
- the height of the electrode assembly 10 and the height h of the frame 20 may be the same or similar to each other.
- the cross section of the frame 20 may have a square shape.
- the frame 20 has an inner peripheral surface 21 facing the electrode assembly 10, an outer peripheral surface 22 located on the opposite side of the inner peripheral surface 21, and an inner peripheral surface 21. And it may include a connection surface 23 connecting the outer circumferential surface 22.
- the connection surface 21 may be the top and bottom surfaces of the frame 20.
- the thickness (t) between the inner peripheral surface 21 and the outer peripheral surface 22 of the frame 20 may be smaller than the height (h) of the frame 20. That is, the cross section of the frame 20 may be approximately rectangular in shape, elongating vertically. As a result, the volume unnecessarily occupied by the frame 20 can be reduced, and the lowering of the energy density of the secondary battery 1 due to the frame 20 can be minimized.
- An opening 24 through which the electrode lead 12 passes may be formed in the frame 20 .
- the opening 24 may be formed penetrating from the inner peripheral surface 21 to the outer peripheral surface 22 of the frame 20.
- the opening portion 24 may be open to one side (eg, the lower side) in the height direction of the frame 20, but is not limited thereto.
- a pair of electrode leads 12 may pass through a single opening 24. However, it is not limited to this, and of course, it is also possible to form a pair of openings 24 spaced apart from each other in the frame 20 to allow the pair of electrode leads 12 to pass through.
- the opening portion 24 is located on one of the four sides of the frame 20. It can be formed in either one.
- the openings 24 may be formed on both sides of the four sides of the frame 20 that face each other.
- the insulating member 13 surrounding a portion of the electrode lead 12 may be sealed between a pair of exterior sheets 30 on the outside of the opening portion 24.
- a pair of exterior sheets 30 may be sealed to each other on the outside of the side where the open portion 24 is formed among the four sides of the frame 20, and some of them may be sealed with the insulating member 13. You can.
- the exterior sheet 30 may be heat-sealed to the frame 20 on both sides in the height direction of the frame 20.
- a pair of exterior sheets 30 may be provided.
- the pair of exterior sheets 30 includes a first exterior sheet 30a sealed on one side (e.g., upper side) of the frame 20, and a first exterior sheet 30a sealed on the other side (e.g., lower side) of the frame 20. ) may include a second exterior sheet 30b that is sealed.
- the exterior sheet 30 may be a laminated sheet including a first resin layer 41, a second resin layer 42, and a metal layer 43.
- the first resin layer 41 may be the outermost layer of the exterior sheet 30.
- the first resin layer 41 can protect the secondary battery 1 from friction and collision with the outside and electrically insulate the electrode assembly 10 from the outside.
- the first resin layer 41 may include polyethylene terephthalate (PET).
- the second resin layer 42 may be the innermost layer of the exterior sheet 30.
- the second resin layer 42 may be sealed to the frame 20 and may be in contact with or adjacent to the electrode assembly 10 . Therefore, the second resin layer 42 must have insulating properties and must have corrosion resistance because it is in contact with the electrolyte.
- the second resin layer 42 and the frame 20 must have excellent thermal bonding strength.
- the second resin layer 42 may include polypropylene (PP) or polyethylene (PE).
- the metal layer 43 may be located between the first resin layer 41 and the second resin layer 42.
- the metal layer 43 secures the mechanical strength of the exterior sheet 30, blocks gas or moisture from entering and exiting the secondary battery 1, and prevents electrolyte leakage.
- the metal layer 43 may include aluminum (AL) or stainless steel (STS).
- each layer 41, 42, and 43 of the exterior sheet 30 is not limited to the above example and may be appropriately selected.
- the laminate sheet is drawn and molded to form a cup portion in which the electrode assembly is accommodated.
- the cup portion is not formed in the exterior sheet 30 according to an embodiment of the present invention. Accordingly, there is no need for a molding process for the cup portion, there is no risk of cracks occurring because the laminated sheet is not stretched, there are no thickness restrictions on the electrode assembly 10, and the external quality of the secondary battery 1 is improved.
- each exterior sheet 30 has a cover area 31 that covers the electrode assembly 10, and an edge area located around the cover area 31 and sealed with the connection surface 23 of the frame 20. (32) may be included.
- the cover area 31 and the edge area 32 may form the same plane.
- the cover area 31 and the edge area 32 may be formed to be flat.
- the cover area 31 may overlap the electrode assembly 10 in the height direction of the secondary battery 1.
- the cover area 31 may cover an open area in the frame 20 .
- the cover area 31 may be in contact with or adjacent to the electrode assembly 10 .
- the edge area 32 may extend from the cover area 31 .
- the edge area 32 may overlap the frame 20 in the height direction of the secondary battery 1.
- the edge area 32 may be bonded and sealed to the frame 20, more specifically, the connection surface 23.
- At least one of the pair of exterior sheets 30 may further include a folding area 33 that is folded at the edge area 32 and sealed with the outer peripheral surface 22 of the frame 20.
- the folding area 33 may be folded from the edge area 32 toward the outer peripheral surface 22 of the frame 20.
- the folding area 33 may be folded at approximately 90 degrees with respect to the edge area 32 . Therefore, compared to the case where the sealing part of the conventional secondary battery pouch is folded close to 180 degrees by double side folding (DSF), the risk of the innermost layer of the laminate sheet, that is, the second resin layer 42, being broken can be reduced. there is.
- the folding area 33 may be sealed by being joined to the frame 20, more specifically, the outer peripheral surface 22.
- the sealing strength between the exterior sheet 30 and the frame 20 can be significantly increased while hardly reducing the energy density of the secondary battery 1.
- the folding area 33 may be folded around a portion of the edge area 32 .
- the folding area 33 may be folded and sealed toward the outer peripheral surface 22 of the side of the frame 20 where the open portion 24 is not formed.
- the folding area 33 is formed on at least one of the remaining three sides of the frame 20. It can be folded toward and sealed.
- the folding area 33 can be folded and sealed toward at least one of the remaining two sides of the frame 20. there is.
- each exterior sheet 30 includes a folding area 33
- the folding areas 33 of a pair of exterior sheets 30 may not overlap each other.
- the folding area 33 of the first exterior sheet 30a may be sealed to a portion of the upper portion of the outer peripheral surface 22 of the frame 20, and the folding area 33 of the second exterior sheet 30b may be sealed. ) may be sealed on a portion of the lower side of the outer peripheral surface 22 of the frame 20. That is, the end of the folding area 33 of the first exterior sheet 30a and the end of the folding area 33 of the second exterior sheet 30b may be at a predetermined distance from each other or may be in contact with each other. As a result, the exterior sheet 30 does not need to be made unnecessarily large, thereby reducing manufacturing costs.
- the folding area 33 of the first exterior sheet 30a and the folding area 33 of the second exterior sheet 30b may overlap and seal each other.
- Each exterior sheet 30 may further include a sealing area 34 connected to the edge area 32.
- the folding area 33 may be folded around a portion of the edge area 32, and the sealing area 34 may be connected to another portion of the perimeter of the edge area 32.
- the sealing area 34 may be formed to correspond to a side of the frame 20 where the open portion 24 is formed.
- the sealing area 34 may be formed to correspond to the one side.
- the sealing area 34 may be formed to correspond to the two sides.
- the sealing areas 34 of the pair of exterior sheets 30 may be sealed to each other.
- the electrode lead 12 may protrude outward through a space between the sealing areas 34 of the pair of exterior sheets 30 .
- the insulating member 13 attached to the electrode lead 12 may be sealed between the sealing areas 34 of the pair of exterior sheets 30.
- At least one sealing area 34 of the pair of exterior sheets 30 may be folded twice.
- at least one sealing area 34 of the pair of exterior sheets 30 includes a first folding portion 34a folded from the edge area 32 toward the outer peripheral surface 22 of the frame 20. ) and a second folding part 34b folded from the first folding part 34a in a direction opposite to the folding direction of the first folding part 34a.
- the sealing area 34 of the pair of exterior sheets 30 may each be folded twice.
- the sum of the heights of the first folding portions 34a of the pair of sealing areas 34 may correspond to the height of the frame 20.
- the second folding portions 34b of the pair of sealing areas 34 may be sealed to each other.
- the electrode lead 12 may protrude outward through the pair of second folding portions 34b, and the insulating member 13 may be sealed between the pair of second folding portions 34b. there is.
- the sealing area 34 of the first exterior sheet 30a is folded twice, and the sealing area 34 of the second exterior sheet 30b is folded into the edge area 32. It can be formed flat and on the same plane.
- the height of the first folding portion 34a of the sealing area 34 of the first exterior sheet 30a may correspond to the height of the frame 20.
- the second folding portion 34b of the sealing area 34 of the first exterior sheet 30a may be sealed with the sealing area 34 of the second exterior sheet 30b.
- the electrode lead 12 may protrude outward through the second folding portion 34b of the first exterior sheet 30a and the sealing area 34 of the second exterior sheet 30b, and the insulating member 13 ) can be sealed between the second folding portion 34b of the first exterior sheet 30a and the sealing area 34 of the second exterior sheet 30b.
- the sealing area 34 may cover the opening 24 formed in the frame 20.
- the first folding portion 34a of the sealing area 34 may be sealed with the outer peripheral surface 22 of the frame 20.
- the sealing force between the exterior sheet 30 and the frame 20 can be further strengthened.
- FIG. 5 is a plan view of a frame according to another embodiment of the present invention
- FIG. 6 is a side view of a frame according to another embodiment of the present invention
- FIG. 7 is a partial cross-sectional view taken along line C-C' of FIG. 5.
- a groove 25 facing the outside of the frame 20' may be formed to increase the sealing area with the exterior sheet 30.
- the groove 25 may extend along the frame 20'.
- the groove 25 may extend along the circumferential direction of the frame 20'.
- the groove 25 may be formed obliquely to form a predetermined angle with the extension direction of the frame 20'.
- the groove 25 may be formed of a plurality of lines parallel to each other.
- the portion between the plurality of protrusions can be interpreted as a groove 25.
- the groove 25 may face the outside of the frame 20'.
- the groove 25 may be formed on the connecting surface 23 and/or the outer peripheral surface 22 of the frame. Accordingly, the exterior sheet 30 can easily cover the groove 25 facing the outside of the frame 20' from the outside.
- the groove 25 may be formed on the connection surface 23 of the frame 20'.
- the groove 25 formed in the connection surface 23 may be sealed with the edge area 32 of the exterior sheet 30.
- the groove 25 may be formed on the outer peripheral surface 22 of the frame 20'.
- the groove 25 formed on the outer peripheral surface 22 may be sealed with the folding area 33 of the exterior sheet 30 or with the first folding portion 34a of the sealing area 34.
- the sealing force between the frame 20 and the exterior sheet 30 can be further strengthened.
- At least one vent hole 26 may be formed in the frame 20' located on a side different from the side where the opening 24 (see FIG. 2) is formed.
- the vent hole 26 may be formed penetrating from the inner peripheral surface 21 to the outer peripheral surface 22 of the frame 20.
- the vent hole 26 may be covered by the folding area 33 of the exterior sheet 30.
- the peripheral portion of the vent hole 26 may be sealed with the folding area 33 of the exterior sheet 30. Accordingly, during normal operation of the secondary battery 1, the vent hole 26 may be blocked.
- the internal pressure of the secondary battery 1 increases due to the gas, and the sealing around the vent hole 26 takes priority. It can be released. Accordingly, the gas can be easily vented to the outside of the secondary battery 1 through the vent hole 26.
- the portion of the folding area 33 of the exterior sheet 30 that is sealed around the vent hole 26 may include a weakly sealed portion or an unsealed portion.
- the sealing area can be reduced by reducing the gap between the end of the folding area 33 and the vent hole 26. It is not limited to this, and is not limited as long as the sealing around the vent hole 26 can be released preferentially.
- vent hole 26 By forming the vent hole 26 on a side different from the side on which the opening 24 (see FIG. 2) is formed, venting of gas and flame containing dust toward the electrode lead 12 can be delayed. As a result, it is possible to prevent fire from spreading or thermal runaway from occurring in a battery module or battery pack containing a plurality of secondary batteries 1.
- Electrode lead 13 Insulating member
- vent hole 30 exterior sheet
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Cell Separators (AREA)
Abstract
Description
Claims (18)
- 전극 조립체;상기 전극 조립체를 수용하도록 상기 전극 조립체의 둘레를 둘러싸며 절연 재질을 갖는 프레임; 및상기 전극 조립체를 커버하도록 상기 프레임의 양측에서 상기 프레임과 실링되는 한 쌍의 외장 시트를 포함하고,상기 프레임에는, 상기 외장 시트와 상기 프레임 사이의 실링 면적이 증가하도록, 상기 프레임의 외부를 향하는 홈이 형성된 이차 전지.
- 제 1 항에 있어서,상기 전극 조립체의 높이와 상기 프레임의 높이는 서로 대응되는 이차 전지.
- 제 1 항에 있어서,상기 홈은, 상기 프레임을 따라 연장되는 이차 전지.
- 제 3 항에 있어서,상기 홈은 서로 나란한 복수개의 라인으로 형성되는 이차 전지.
- 제 1 항에 있어서,상기 프레임에는 상기 전극 조립체에 연결된 전극 리드가 통과하는 개방부가 형성되는 이차 전지.
- 제 5 항에 있어서,상기 전극 리드의 일부를 감싸는 절연 부재는 상기 개방부의 외측에서 상기 한 쌍의 외장 시트의 사이에 실링되는 이차 전지.
- 제 5 항에 있어서,상기 프레임에는, 상기 개방부가 형성된 변과 다른 변에 위치한 적어도 하나의 벤트홀이 형성되는 이차 전지.
- 제 1 항에 있어서,상기 프레임은,상기 전극 조립체를 마주보는 내둘레면;상기 내둘레면의 반대편에 위치한 외둘레면; 및상기 내둘레면과 외둘레면을 연결하는 연결면을 포함하는 이차 전지.
- 제 8 항에 있어서,상기 외둘레면과 상기 내둘레면 사이의 두께는, 상기 프레임의 높이보다 작은 이차 전지.
- 제 8 항에 있어서,상기 외장 시트는,상기 전극 조립체를 커버하는 커버 영역; 및상기 커버 영역의 둘레에 위치하며 상기 연결면과 실링되는 가장자리 영역을 포함하는 이차 전지.
- 제 10 항에 있어서,상기 커버 영역 및 가장자리 영역은 동일 평면을 이루는 이차 전지.
- 제 10 항에 있어서,상기 한 쌍의 외장 시트 중 적어도 하나는,상기 가장자리 영역에서 폴딩되어 상기 외둘레면과 실링되는 폴딩 영역을 더 포함하는 이차 전지.
- 제 12 항에 있어서,상기 한 쌍의 외장 시트의 상기 폴딩 영역은 서로 비 중첩되는 이차 전지.
- 제 12 항에 있어서,상기 프레임에는, 상기 폴딩 영역에 의해 커버되는 적어도 하나의 벤트홀이 형성된 이차 전지.
- 제 10 항에 있어서,상기 외장 시트는, 상기 가장자리 영역에 연결된 실링 영역을 더 포함하고,상기 한 쌍의 외장 시트의 상기 실링 영역은 서로 실링되는 이차 전지.
- 제 15 항에 있어서,상기 프레임에는, 상기 전극 조립체에 연결된 전극 리드가 통과하는 개방부가 형성되고,상기 실링 영역은 상기 개방부를 커버하는 이차 전지.
- 제 15 항에 있어서,상기 한 쌍의 외장 시트 중 적어도 하나의 상기 실링 영역은,상기 가장자리 영역에서 상기 외둘레면을 향해 폴딩된 제1폴딩부; 및상기 제1폴딩부에서 상기 제1폴딩부의 폴딩 방향과 반대 방향으로 폴딩된 제2폴딩부를 포함하는 이차 전지.
- 제 15 항에 있어서,상기 제1폴딩부는 상기 외둘레면에 실링되는 이차 전지.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23898399.3A EP4625640A4 (en) | 2022-12-02 | 2023-12-01 | SECONDARY BATTERY |
| CN202380081162.XA CN120266325A (zh) | 2022-12-02 | 2023-12-01 | 二次电池 |
| JP2025531174A JP2025539169A (ja) | 2022-12-02 | 2023-12-01 | 二次電池 |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20220166857 | 2022-12-02 | ||
| KR10-2022-0166857 | 2022-12-02 | ||
| KR1020230170861A KR102807655B1 (ko) | 2022-12-02 | 2023-11-30 | 이차 전지 |
| KR10-2023-0170861 | 2023-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024117876A1 true WO2024117876A1 (ko) | 2024-06-06 |
Family
ID=91324642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2023/019726 Ceased WO2024117876A1 (ko) | 2022-12-02 | 2023-12-01 | 이차 전지 |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4625640A4 (ko) |
| JP (1) | JP2025539169A (ko) |
| CN (1) | CN120266325A (ko) |
| WO (1) | WO2024117876A1 (ko) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4723320A1 (en) * | 2024-09-03 | 2026-04-08 | Samsung Sdi Co., Ltd. | Secondary battery including central structure and manufacturing method thereof |
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| KR20110006524A (ko) * | 2009-07-14 | 2011-01-20 | 삼성에스디아이 주식회사 | 이차전지 |
| KR101112450B1 (ko) * | 2006-03-08 | 2012-02-20 | 주식회사 엘지화학 | 밀봉성이 향상된 이차전지 |
| JP2016506608A (ja) * | 2013-11-27 | 2016-03-03 | エルジー ケム. エルティーディ. | 二次電池用パウチ及びこれを含む二次電池 |
| KR20160055600A (ko) * | 2014-11-10 | 2016-05-18 | 주식회사 엘지화학 | 이차전지용 파우치 및 이를 포함하는 파우치형 이차전지 |
| KR20220158642A (ko) * | 2021-05-24 | 2022-12-01 | 주식회사 엘지에너지솔루션 | 전지 셀 및 이를 포함하는 전지 모듈 |
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| US20110311862A1 (en) * | 2010-06-21 | 2011-12-22 | Samsung Sdi Co., Ltd. | Secondary battery |
| KR102234704B1 (ko) * | 2014-09-04 | 2021-04-01 | 삼성에스디아이 주식회사 | 이차전지 |
| US10700323B2 (en) * | 2017-08-23 | 2020-06-30 | Ford Global Technologies, Llc | Apparatus for directed vent gas expulsion in battery cells |
| HUE073149T2 (hu) * | 2018-11-13 | 2026-01-28 | Lg Energy Solution Ltd | Tasakburkolat és eljárás ilyen tasakburkolattal ellátott tasak típusú szekunder akkumulátor elõállítására |
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2023
- 2023-12-01 CN CN202380081162.XA patent/CN120266325A/zh active Pending
- 2023-12-01 JP JP2025531174A patent/JP2025539169A/ja active Pending
- 2023-12-01 WO PCT/KR2023/019726 patent/WO2024117876A1/ko not_active Ceased
- 2023-12-01 EP EP23898399.3A patent/EP4625640A4/en active Pending
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| KR20220158642A (ko) * | 2021-05-24 | 2022-12-01 | 주식회사 엘지에너지솔루션 | 전지 셀 및 이를 포함하는 전지 모듈 |
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| EP4723320A1 (en) * | 2024-09-03 | 2026-04-08 | Samsung Sdi Co., Ltd. | Secondary battery including central structure and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4625640A1 (en) | 2025-10-01 |
| CN120266325A (zh) | 2025-07-04 |
| JP2025539169A (ja) | 2025-12-03 |
| EP4625640A4 (en) | 2025-12-10 |
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