WO2020130455A1 - 파우치형 이차전지 및 그 제조방법 - Google Patents
파우치형 이차전지 및 그 제조방법 Download PDFInfo
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- WO2020130455A1 WO2020130455A1 PCT/KR2019/017354 KR2019017354W WO2020130455A1 WO 2020130455 A1 WO2020130455 A1 WO 2020130455A1 KR 2019017354 W KR2019017354 W KR 2019017354W WO 2020130455 A1 WO2020130455 A1 WO 2020130455A1
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- Prior art keywords
- coating layer
- case
- lower case
- upper case
- sealing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
- H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
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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
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
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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
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/1245—Primary casings; Jackets or wrappings characterised by the material having a layered structure characterised by the external coating on the casing
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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
- H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
- H01M50/141—Primary casings; Jackets or wrappings for protecting against damage caused by external factors for protecting against humidity
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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
- H01M50/19—Sealing members characterised by the material
- H01M50/193—Organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2503/00—Polyurethanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2505/00—Polyamides
- B05D2505/50—Polyimides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2507/00—Polyolefins
- B05D2507/01—Polyethylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2507/00—Polyolefins
- B05D2507/02—Polypropylene
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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
- B29C66/03—After-treatments in the joint area
- B29C66/038—Covering the joint by a coating material
- B29C66/0382—Covering the joint by a coating material the coating material being in liquid or paste form
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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
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
- B29C66/133—Fin-type joints, the parts to be joined being flexible
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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
- B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
- B29C66/137—Beaded-edge joints or bead seals
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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
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
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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
- 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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- 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
- B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
- B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
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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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
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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
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7146—Battery-cases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
- F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
- F16J15/122—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement generally parallel to the surfaces
- F16J15/123—Details relating to the edges of the packing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a pouch type secondary battery and a method for manufacturing the same, and more specifically, to form an insulating coating layer including a conformal coating layer on the metal layer exposed on the cut surface of the battery case, to completely protect the metal layer from moisture or air. It relates to a pouch-type secondary battery and a method of manufacturing the same.
- Secondary batteries are classified into cylindrical batteries and rectangular batteries in which the electrode assembly is embedded in a cylindrical or square metal can, and pouch-shaped batteries in which the electrode assembly is embedded in a pouch-shaped case of an aluminum laminate sheet, depending on the shape of the battery case. .
- the electrode assembly embedded in the battery case is a power planter capable of charging and discharging, comprising a positive electrode, a negative electrode, and a separator structure interposed between the positive electrode and the negative electrode, by interposing a separator between a positive electrode and a negative electrode of a long sheet type coated with an active material. It is classified into a wound jelly-roll type and a stacked type sequentially stacked with a separator interposed between a plurality of positive and negative electrodes of a predetermined size. Among them, the jelly-roll electrode assembly has advantages of easy manufacturing and high energy density per weight.
- the electrode assembly 100 is housed inside the battery case 200, and the positive and negative tabs are welded to the two lead members 110, respectively, to provide a battery case 200. It is exposed outside.
- the battery case 200 for storing the electrode assembly 100 has a structure in which the lower case 220 and the upper case 210 covering the lower case 220 are integrally formed, and the lower case 220 and The surface in which the upper case 210 abuts is bent and folded. And these lower case 220 and the upper case 210 is a laminate structure consisting of an inner coating layer, a metal layer and an outer coating layer.
- the lower case 220 and the upper case 210 are cut. This process is accompanied, and the metal layer is exposed to the outside during this process, which causes a deterioration of the battery performance, such as promoting deterioration of the battery.
- Korean Patent Publication No. 2016-131706 storing an electrode assembly between an upper exterior member and a lower exterior member of a pouch, an upper exterior member and a lower exterior member of the pouch First sealing the outer region of the step, cutting the edges of the upper and lower sheath members of the sealed pouch, and squeezing the upper and lower ends of the upper and lower sheath members of the cut pouch for upper and lower parts.
- a method of manufacturing a pouch type secondary battery comprising forming an additional sealing portion on a surface of a cutting portion of an exterior member.
- the metal layer exposed portion is in contact with the pack-shaped metal material by forming an additional sealing portion on the surface of the cutting portion of the exterior member, but a part of the material of the inner resin layer is cut through compression. Since it forms an additional sealing part by flowing outward, the inner resin layer must be thickened, and thus the overall volume of the battery case increases. Also, since the additional sealing part is formed simply by pressing, a sealing part is formed on a part of the exposed surface of the metal layer. There is a problem that it is highly unlikely.
- the present invention in order to solve the above problems, in forming a coating layer covering the metal layer on the side of the sealing portion for combining the upper case and the lower case, the process is simple and the manufacturing method of the pouch type secondary battery having a low defect rate and An object of the present invention is to provide a pouch type secondary battery manufactured by the manufacturing method.
- Pouch type secondary battery according to the present invention for solving the above problems, a battery case made of a laminate sheet; And an electrode assembly accommodated in the battery case, wherein the battery case is composed of an upper case and a lower case made of a laminate sheet including an outer coating layer, a metal layer, and an inner coating layer, and the upper case and the lower case are mutually coupled. It is characterized in that a sealing portion for providing is provided on the outer periphery of the upper case and the lower case, and a conformal coating layer is formed on the side of the sealing portion to prevent exposure of the metal layer.
- a resin coating layer is further formed on a predetermined area of the outer surface of the conformal coating layer, and the resin coating layer may be formed by melting a part of the outer coating layer.
- a resin coating layer is further formed on a predetermined region of the inner surface of the conformal coating layer, and the resin coating layer may be formed by melting a part of the outer coating layer and/or the inner coating layer.
- a method of manufacturing a pouch type secondary battery according to a first preferred embodiment of the present invention is a first step of preparing a battery case composed of an upper case and a lower case by cutting a laminate sheet including an outer coating layer, a metal layer, and an inner coating layer. ; A second step of receiving an electrode assembly between the upper case and the lower case; A third step of adhering the sealing portion provided on the outer periphery of the upper case and the lower case; And it characterized in that it comprises a fourth step of forming a conformal (Conformal) coating layer on the side of the sealing portion to prevent exposure of the metal layer.
- a conformal (Conformal) coating layer on the side of the sealing portion to prevent exposure of the metal layer.
- the sealing portion of the upper case and the lower case is further heat-sealed to further include a fifth step of sealing the upper case and the lower case.
- a resin coating layer is formed on a predetermined area of the outer surface of the conformal coating layer, and the resin coating layer is formed as a part of the molten outer coating layer when the sealing portion is heat-sealed.
- a method of manufacturing a pouch-type secondary battery according to a second preferred embodiment of the present invention is a first step of preparing a battery case composed of an upper case and a lower case by cutting a laminate sheet including an outer coating layer, a metal layer, and an inner coating layer. ; A second step of receiving an electrode assembly between the upper case and the lower case; A third step of adhering the sealing portion provided on the outer periphery of the upper case and the lower case; A fourth step of sealing the upper case and the lower case by heat-sealing the sealing portion of the outer periphery of the upper case and the lower case; And a fifth step of forming a conformal coating layer on the sealing part side to prevent exposure of the metal layer.
- the resin coating layer is partially formed in a predetermined area on the side surface of the sealing portion, and the resin coating layer is formed as a part of the inner coating layer and/or the outer coating layer that is melted when the sealing portion is heat-sealed.
- the battery module according to the present invention is characterized in that the battery module including the pouch-type secondary battery.
- the battery pack according to the present invention is characterized in that the battery pack including the battery module.
- FIG. 1 is a perspective view of a pouch type secondary battery according to the prior art.
- FIG. 2 is a flowchart illustrating a method of manufacturing a pouch type secondary battery according to a first preferred embodiment of the present invention.
- FIG. 3 is a process diagram illustrating an assembly process of the upper case and the lower case according to the first embodiment.
- FIG. 4 is a flowchart illustrating a method of manufacturing a pouch type secondary battery according to a second preferred embodiment of the present invention.
- FIG. 5 is a process diagram illustrating an assembly process of the upper case and the lower case according to the second embodiment.
- FIG. 6 is a perspective view of a pouch type secondary battery manufactured according to the present invention.
- FIG. 2 is a flowchart illustrating a method of manufacturing a pouch type secondary battery according to a first preferred embodiment of the present invention
- FIG. 3 is a process diagram illustrating an assembly process of an upper case and a lower case according to the first embodiment.
- the manufacturing method of the pouch-type secondary battery according to the first embodiment of the present invention the first step of preparing the battery case 200 consisting of the upper case 210 and the lower case 220, the upper case 210 and the lower
- the battery case 200 is a case for receiving the electrode assembly 100, consisting of an outer coating layer 211, 221 / metal layer 212, 222 / inner coating layer (213, 223)
- a space portion capable of accommodating the electrode assembly 100 is formed using a laminate sheet.
- the inner coating layers 213 and 223 directly contact the electrode assembly 100, they must have insulation and electrolytic resistance. In addition, a high sealing property is required for sealing the inside and the outside of the pouch-type secondary battery, and the sealing portion where the inner layer of the upper case and the inner layer of the lower case are heat-sealed must have excellent heat adhesion strength.
- the material of the inner coating layers 213 and 223 may be selected from polyolefin-based resins such as polypropylene, polyethylene, polyethylene acrylic acid, and polybutylene, polyurethane resins, and polyimide resins having excellent chemical resistance and good sealing properties. It is not limited to this, and specifically, polypropylene having excellent mechanical properties and chemical resistance such as tensile strength, stiffness, surface hardness, and impact strength is most preferable.
- the metal layers 212 and 222 in contact with the inner coating layers 213 and 223 correspond to a barrier layer that prevents moisture or various gases from penetrating into the battery from the outside.
- a barrier layer that prevents moisture or various gases from penetrating into the battery from the outside.
- Aluminum thin films can be used.
- outer coating layers 211 and 221 are provided on the other side of the metal layers 212 and 222, and the outer coating layers 211 and 221 protect the electrode assembly 100 while maintaining heat resistance and chemical resistance.
- a heat-resistant polymer having excellent moisture permeability and air permeability and for example, nylon or polyethylene terephthalate may be used, but is not limited thereto.
- the electrode assembly 100 accommodated in the battery case 200 is a jelly-roll electrode assembly having a structure in which a separator is interposed between a long sheet-like positive electrode and a negative electrode, or a rectangular electrode and a negative electrode interposed between the separator.
- a stacked electrode assembly composed of unit cells of a structure stacked in one state, a stack-folding electrode assembly in which the unit cells are wound by a long separation film, or the unit cells are stacked with a separator interposed therebetween. It may be made of a lamination-stack electrode assembly attached to each other, but is not limited thereto.
- a lead member 110 composed of a positive electrode lead and a negative electrode lead is electrically connected to a positive electrode tab (not shown) and a negative electrode tab (not shown) attached to the top of the electrode assembly 100 to be welded to the positive electrode lead and the negative electrode lead, respectively. It is connected, and is made of a structure exposed to the outside of the battery case 200.
- a pair of insulating films (not shown) facing each other is located in the sealing portion 230 in which the positive electrode lead and the negative electrode lead are positioned so as to ensure insulation and sealing properties, and the lead member 110 is a pair of insulation It is arranged to pass between the films (not shown).
- the sealing portion 230 of the upper case 210 in a state in which the electrode assembly 100 is accommodated is simply in close contact.
- the sealing of the upper case 210 and the lower case 220 using a pair of sealing bars 300 located on the upper and lower sealing portions 230 of the upper case 210 and the lower case 220 The portion 230 is pressed with a predetermined force so that it can be in close contact.
- the sealing portion 230 is not heated, and thus the melting of the inner coating layers 213 and 223 or the outer coating layers 211 and 221 does not occur.
- the pair of sealing bars 300 are further provided with a bent portion 310 that is bent at a predetermined angle, and a wing portion 320 extending from the bent portion 310.
- one side of the sealing bar 300 in contact with the upper surface of the outer surface layer 211 of the upper case 210 extends a predetermined length in the direction of the cutting surface of the upper case 210 and then bends down to bend 310 ), and a wing portion 320 extending over a predetermined angle from the bent portion 310.
- the other side of the sealing bar 300 in contact with the lower surface of the outer surface layer 221 of the lower case 220 extends a predetermined length in the direction of the cutting surface of the lower case 220, and then the bent portion 310 is bent upward, and the bent portion It includes a wing portion 320 extending downward while being inclined at a predetermined angle at 310.
- the wing part 320 protects the sealing bar 300 from the sprayed Conformal coating resin and concentrates at a desired location. In order to ensure that the conformal (Conformal) coating layer 241 is seated. And the bending part 310 is to induce a portion of the resin of the melted outer coating layers 211 and 221 to move to a desired position when the sealing part 230 heated in the fifth step is heated.
- the fourth step is a step of forming a conformal coating layer 241 on the side of the sealing portion 230 corresponding to the cut surface of the laminate sheet, in more detail near the sealing portion 230.
- the upper case 210 and the lower case 220 constituting the battery case 200 are cut and formed of a laminate sheet composed of outer coating layers 211 and 221/metal layers 212 and 222/inner coating layers 213 and 223.
- the sealing portion 230 is heat-sealed, it is generally electrically vulnerable because some or all of the metal layers 212 and 222 are exposed to the outside.
- a conformal coating layer 241 is formed so that the cut surfaces of the metal layers 212 and 222 are not exposed to the outside.
- the conformal coating layer 241 may be formed on the metal layers 212 and 222 as well as the outer coating layers 211 and 221 and/or the inner coating layers 213 and 223.
- conformal (Conformal) coating is a process of forming a protective film with a predetermined resin on the surface of a completed PCB assembly by mounting electronic components on a printed circuit board (PCB). That is, when the PCB assembly is prepared, a protective coating is formed on the surface of the PCB assembly through various coating methods to form a protective film, and a spray coating method for discharging the resin for conformal coating, It can be formed through various methods such as a flow coating method, a dip coating method in which a part of a PCB assembly is immersed in a liquid solution for conformal coating, or a chemical vapor deposition method. have.
- a spray coating method is preferred, and the outer coating layers 211, 221 and/or adjacent to the metal layers 212, 222 or the metal layers 212, 222 exposed outside and/or This is because the inner coating layers 213 and 223 can be selectively coated.
- a film for conformal coating if a film can be formed on the metal layers 212 and 222, it is not particularly limited, and may be subjected to a cooling process for a predetermined time for curing after spray coating.
- the conformal coating layer 240 on the side of the sealing portion 230 formed through the above process perfectly coats the metal layers 212 and 222, corrosion caused by moisture or air contacting the metal layer, Causes of deterioration of battery performance such as insulation resistance can be fundamentally blocked.
- the fifth step is performed by sealing the upper case 210 and the lower case 220 by heat-sealing the sealing portion 230 of the outer circumference of the upper case 210 and the lower case 220.
- the sealing portions 230 provided along the periphery of the upper case 210 and the lower case 220 are heated to maintain the sealed state of the pouch-type secondary battery, and the inner covering layers 213 and 223 are then heated.
- the battery case 200 is sealed by bonding to each other.
- the resin coating layer 242 extends to the conformal coating layer 241 in a state of being connected to the outer coating layers 211 and 221, the conformal coating layer 241 is prevented from peeling and moisture Alternatively, the metal layers 212 and 222 can be more reliably protected from air or the like.
- the thickness of the outer coating layers 211 and 221 may be the same as the conventional thickness.
- FIG. 4 is a flowchart illustrating a method of manufacturing a pouch type secondary battery according to a second preferred embodiment of the present invention
- FIG. 5 is a process diagram illustrating an assembly process of the upper case and the lower case according to the second embodiment.
- the manufacturing method of the pouch-type secondary battery according to the second embodiment of the present invention includes the first step of preparing the battery case 200 including the upper case 210 and the lower case 220, the upper case 210 and the lower part
- the configuration of the first step to the third step is the same as the first step to the third step of the first embodiment described above, so a detailed description is omitted.
- the fourth and fifth steps different from the first embodiment will be described.
- the sealing state of the pouch-type secondary battery The battery case 200 is sealed by heating the sealing portions 230 provided along the periphery of the upper case 210 and the lower case 220 to maintain the inner cover layers 213 and 223 to be bonded to each other.
- the fifth step is a step of forming a conformal coating layer 241 on the side of the sealing portion 230 so that the cut surfaces of the metal layers 212 and 222 are not exposed to the outside.
- the conformal coating layer 241 Since a film is formed on all the metal layers 212 and 222, the metal layers 212 and 222 can be protected from moisture or air.
- the conformal coating layer 241 has been described in detail in the first embodiment and will be omitted.
- the pouch-type secondary battery manufactured according to the first or second embodiment of the present invention includes an outer coating layer 211, 221, a metal layer 212, 222, and an inner coating layer 213, 223
- the electrode assembly 100 is housed inside the battery case 200 composed of the upper case 210 and the lower case 220 made of a laminate sheet.
- a coating layer 240 for preventing exposure of the metal layer is additionally formed on the side of the sealing portion 230 for coupling the upper case 210 and the lower case 220.
- the resin coating layer 241 in which a part of the outer coating layers 211 and 221 is melted is a conformal coating layer 242 as described in FIG. 3.
- the coating layer 240 is formed in a shape that is additionally formed on a predetermined area of the outer surface.
- the resin coating layer 242 in which a part of the outer coating layers 211 and 221 and/or the inner coating layers 213 and 223 is melted The coating layer 240 is formed in a shape additionally formed in a predetermined region of the inner surface of the conformal coating layer 241.
- outer coating layer 212 metal layer
- the process forms an additional coating layer on the metal layer using a simple conformal coating method, the metal layer can be formed without using a thick laminate sheet with an inner coating layer or an outer coating layer. It is possible to completely block moisture or air.
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Abstract
Description
Claims (10)
- 라미네이트 시트로 이루어진 전지케이스; 및 상기 전지케이스에 수납되는 전극조립체를 포함하되,상기 전지케이스는, 외부 피복층, 금속층 및 내부 피복층을 포함하는 라미네이트 시트로 이루어진 상부케이스와 하부케이스로 구성되며,상기 상부케이스와 하부케이스를 상호 결합하기 위한 실링부가 상부케이스와 하부케이스 외주연부에 구비되고, 상기 실링부 측면에는 상기 금속층의 노출을 방지하기 위한 컨포멀(Conformal) 코팅층이 형성되어 있는 것을 특징으로 하는 파우치형 이차전지.
- 제1항에 있어서,상기 컨포멀(Conformal) 코팅층의 외측 표면 소정 영역에는 수지 코팅층이 더 형성되되,상기 수지 코팅층은 외부 피복층의 일부가 용융되어 형성된 것을 특징으로 하는 파우치형 이차전지.
- 제1항에 있어서,상기 컨포멀(Conformal) 코팅층의 내측 표면 소정 영역에는 수지 코팅층이 더 형성되되,상기 수지 코팅층은 외부 피복층 및/또는 내부 피복층의 일부가 용융되어 형성된 것을 특징으로 하는 파우치형 이차전지.
- 외부 피복층, 금속층 및 내부 피복층을 포함하는 라미네이트 시트를 절단하여 상부케이스와 하부케이스로 이루어진 전지케이스를 준비하는 제1 단계;상기 상부케이스와 하부케이스 사이에 전극조립체를 수납하는 제2단계;상기 상부케이스와 하부케이스의 외주연부에 구비된 실링부를 밀착하는 제3 단계; 및금속층의 노출을 방지할 수 있도록 상기 실링부 측면에 컨포멀(Conformal) 코팅층을 형성하는 제4 단계를 포함하는 것을 특징으로 하는 파우치형 이차전지의 제조방법.
- 제4항에 있어서,상기 상부케이스와 하부케이스의 실링부를 열융착시켜 상부케이스와 하부케이스를 밀봉하는 제5 단계를 더 포함하는 것을 특징으로 하는 파우치형 이차전지의 제조방법.
- 제5항에 있어서,상기 제5 단계에서는, 컨포멀(Conformal) 코팅층의 외측 표면 소정 영역에 수지 코팅층이 형성되되, 상기 수지 코팅층은 실링부 열융착시 용융된 외부 피복층의 일부로 형성되는 것을 특징으로 하는 파우치형 이차전지의 제조방법.
- 외부 피복층, 금속층 및 내부 피복층을 포함하는 라미네이트 시트를 절단하여 상부케이스와 하부케이스로 이루어진 전지케이스를 준비하는 제1 단계;상기 상부케이스와 하부케이스 사이에 전극조립체를 수납하는 제2단계;상기 상부케이스와 하부케이스의 외주연부에 구비된 실링부를 밀착하는 제3 단계;상기 상부케이스와 하부케이스의 외주연부의 실링부를 열융착시켜 상부케이스와 하부케이스를 밀봉하는 제4 단계; 및금속층의 노출을 방지할 수 있도록 상기 실링부 측면에 컨포멀(Conformal) 코팅층을 형성하는 제5 단계를 포함하는 것을 특징으로 하는 파우치형 이차전지의 제조방법.
- 제7항에 있어서,상기 제4 단계에서는, 실링부 측면의 소정 영역에 수지 코팅층이 부분적으로 형성되되, 상기 수지 코팅층은 실링부 열융착시 용융된 내부 피복층 및/또는 외부 피복층의 일부로 형성되는 것을 특징으로 하는 파우치형 이차전지의 제조방법.
- 제1항 내지 제3항 중 어느 한 항의 파우치형 이차전지를 포함하는 전지모듈.
- 제9항의 전지모듈을 포함하는 전지팩.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES19899199T ES3034960T3 (en) | 2018-12-18 | 2019-12-10 | Pouch-type secondary battery and method of manufacturing the same |
| EP19899199.4A EP3754741B1 (en) | 2018-12-18 | 2019-12-10 | Pouch-type secondary battery and method of manufacturing the same |
| CN201980009129.XA CN111630677B (zh) | 2018-12-18 | 2019-12-10 | 袋型二次电池及其制造方法 |
| US16/976,982 US12126035B2 (en) | 2018-12-18 | 2019-12-10 | Pouch-type secondary battery and method of manufacturing the same |
| JP2020532996A JP7048858B2 (ja) | 2018-12-18 | 2019-12-10 | パウチ型二次電池及びその製造方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020180163948A KR102384007B1 (ko) | 2018-12-18 | 2018-12-18 | 파우치형 이차전지 및 그 제조방법 |
| KR10-2018-0163948 | 2018-12-18 |
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| WO2020130455A1 true WO2020130455A1 (ko) | 2020-06-25 |
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| PCT/KR2019/017354 Ceased WO2020130455A1 (ko) | 2018-12-18 | 2019-12-10 | 파우치형 이차전지 및 그 제조방법 |
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|---|---|
| US (1) | US12126035B2 (ko) |
| EP (1) | EP3754741B1 (ko) |
| JP (1) | JP7048858B2 (ko) |
| KR (1) | KR102384007B1 (ko) |
| CN (1) | CN111630677B (ko) |
| ES (1) | ES3034960T3 (ko) |
| HU (1) | HUE072039T2 (ko) |
| WO (1) | WO2020130455A1 (ko) |
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| KR20230120513A (ko) * | 2022-02-09 | 2023-08-17 | 에스케이온 주식회사 | 이차전지용 케이스, 이를 포함하는 이차전지, 모듈 및 디바이스 |
| CN115579558A (zh) * | 2022-10-12 | 2023-01-06 | 上海国轩新能源有限公司 | 密封结构的密封方法、密封结构以及电池 |
| JP7794141B2 (ja) | 2023-02-06 | 2026-01-06 | トヨタ自動車株式会社 | ラミネート型電池、電池スタック及びラミネート型電池の製造方法 |
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| KR101797694B1 (ko) | 2015-02-24 | 2017-11-15 | 주식회사 엘지화학 | 보호회로 모듈을 포함하는 전지팩 |
| KR101883536B1 (ko) * | 2015-04-29 | 2018-07-30 | 주식회사 엘지화학 | 파우치형 이차전지 및 그 제조방법 |
| KR102006203B1 (ko) | 2015-06-29 | 2019-08-01 | 주식회사 엘지화학 | 절연성이 개선된 파우치 외장 부재 및 이를 포함하는 파우치형 이차 전지 |
| KR101883040B1 (ko) | 2016-01-08 | 2018-07-27 | 삼성전기주식회사 | 칩 저항 소자 |
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2018
- 2018-12-18 KR KR1020180163948A patent/KR102384007B1/ko active Active
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2019
- 2019-12-10 WO PCT/KR2019/017354 patent/WO2020130455A1/ko not_active Ceased
- 2019-12-10 EP EP19899199.4A patent/EP3754741B1/en active Active
- 2019-12-10 US US16/976,982 patent/US12126035B2/en active Active
- 2019-12-10 JP JP2020532996A patent/JP7048858B2/ja active Active
- 2019-12-10 HU HUE19899199A patent/HUE072039T2/hu unknown
- 2019-12-10 CN CN201980009129.XA patent/CN111630677B/zh active Active
- 2019-12-10 ES ES19899199T patent/ES3034960T3/es active Active
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| KR20080005627A (ko) * | 2006-07-10 | 2008-01-15 | 주식회사 엘지화학 | 실링부의 안전성이 향상된 이차전지 |
| KR20120060315A (ko) * | 2010-12-02 | 2012-06-12 | 주식회사 엘지화학 | 절연성이 향상된 이차전지 |
| KR20130139026A (ko) * | 2012-06-12 | 2013-12-20 | 주식회사 엘지화학 | 비노출 실링부를 구비한 파우치형 전지 |
| KR20140032710A (ko) * | 2012-09-07 | 2014-03-17 | 주식회사 엘지화학 | 파우치형 이차전지의 제조방법 |
| KR20160115191A (ko) * | 2015-03-26 | 2016-10-06 | 주식회사 엘지화학 | 파우치형 전지케이스의 엣지의 코팅 방법 및 그로부터 제조된 전지셀 |
| KR20160131706A (ko) | 2015-05-08 | 2016-11-16 | 주식회사 엘지화학 | 파우치형 이차전지 및 그의 제조 방법 |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR102384007B1 (ko) | 2022-04-07 |
| CN111630677A (zh) | 2020-09-04 |
| EP3754741B1 (en) | 2025-06-11 |
| US12126035B2 (en) | 2024-10-22 |
| ES3034960T3 (en) | 2025-08-27 |
| EP3754741A1 (en) | 2020-12-23 |
| JP7048858B2 (ja) | 2022-04-06 |
| US20210028417A1 (en) | 2021-01-28 |
| HUE072039T2 (hu) | 2025-10-28 |
| EP3754741A4 (en) | 2021-06-23 |
| JP2021510901A (ja) | 2021-04-30 |
| KR20200075362A (ko) | 2020-06-26 |
| CN111630677B (zh) | 2022-11-11 |
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