WO2024014942A1 - 파우치형 전지셀 및 그 제조방법 - Google Patents
파우치형 전지셀 및 그 제조방법 Download PDFInfo
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- WO2024014942A1 WO2024014942A1 PCT/KR2023/095027 KR2023095027W WO2024014942A1 WO 2024014942 A1 WO2024014942 A1 WO 2024014942A1 KR 2023095027 W KR2023095027 W KR 2023095027W WO 2024014942 A1 WO2024014942 A1 WO 2024014942A1
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- Prior art keywords
- metal
- pouch
- battery cell
- type battery
- pair
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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
- H01M50/191—Inorganic 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/206—Laser sealing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/244—Overlap seam welding
-
- 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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/36—Bending and joining, e.g. for making hollow articles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/049—Processes for forming or storing electrodes in the battery container
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
- H01M50/136—Flexibility or foldability
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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
- H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
-
- 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 is an electrode assembly between a pair of cases including a first resin layer forming the innermost layer, a second resin layer forming the outermost layer, and a metal layer laminated between the first resin layer and the second resin layer. This relates to the accepted pouch-type battery cell and its manufacturing method.
- Lithium secondary batteries can be classified into can-type, square-type, and pouch-type depending on the shape of the exterior material.
- pouch-type secondary batteries are widely used in medium to large-sized battery modules due to their advantages of high energy density and ease of stacking.
- a pouch-type battery cell has a structure in which an electrode assembly is accommodated in a pouch-type battery case and a sealing portion is formed at the edge of the battery case.
- TP heat transfer
- One problem that the present invention aims to solve is to provide a pouch-type battery cell with a sealing portion having high heat resistance and sealing strength, and a method of manufacturing the same.
- the pouch-type battery cell includes a first resin layer forming the innermost layer, a second resin layer forming the outermost layer, and a metal layer laminated between the first resin layer and the second resin layer.
- An electrode assembly may be accommodated between a pair of cases.
- the pouch-type battery cell includes a cup portion formed in at least one of the pair of cases and accommodating the electrode assembly; an insulating sealing portion sealing the first resin layers of the pair of cases; a folded portion in which an edge of one case of the pair of cases is folded to surround an edge of the other case; and a metal sealing part formed in the folded portion and sealing the metal layers of the pair of cases with each other.
- the metal sealing part may be located outside the insulating sealing part.
- the metal sealing part may include: a first metal sealing part in which one surface of the metal layer of the other case is sealed with the metal layer of the one case; and a second metal sealing portion in which the other surface of the metal layer of the other case is sealed with the metal layer of the one case.
- the first resin layer and the second resin layer may be excluded from the metal sealing portion.
- the first resin layer may be excluded from the metal sealing portion, and the second resin layer may be excluded from either outer surfaces of both sides of the folded portion.
- the metal layer may include stainless steel.
- a method of manufacturing a pouch-type battery cell includes the steps of accommodating the electrode assembly in a cup portion formed in at least one of the pair of cases; Sealing the first resin layers of the pair of cases with each other; forming a folded portion by folding an edge of one of the pair of cases to surround an edge of the other case; and sealing the metal layers with each other at the folded portion.
- the first resin layers When sealing the first resin layers together, the first resin layers may be heat-sealed to each other, and when sealing the metal layers together, the metal layers may be laser welded to each other.
- the edge portion of the pair of cases includes an exposed area where the first resin layer is excluded and the metal layer is exposed to the inside, and when forming the folded portion, the exposed area of the one case is the exposed area of the other case. can be wrapped.
- the laser may be irradiated to one side of the outer surfaces of both sides of the folded portion from which the second resin layer is excluded.
- the sealing of the pouch-type battery cell can be maintained even at high temperature and high pressure and can have high sealing strength.
- thermal propagation (TP) from occurring to other battery cells can be prevented or sufficiently delayed.
- the insulating sealing part is formed inside the metal sealing part, the case can be maintained in an insulated state with respect to the electrode assembly and the electrolyte solution.
- the sealing strength of the metal sealing part can be further increased.
- the ratio of the gap between metal layers to the thickness of the folded portion becomes smaller, so the quality of laser welding can be improved.
- Figure 1 is a perspective view showing a case and an electrode assembly of a pouch-type battery cell according to a first embodiment of the present invention.
- Figure 2 is a cross-sectional view of a pouch-type battery cell according to the first embodiment of the present invention.
- Figure 3 is a cross-sectional view of a pouch-type battery cell according to a second embodiment of the present invention.
- Figure 4 is an enlarged cross-sectional view of the folded portion of the pouch-type battery cell according to the third embodiment of the present invention.
- Figure 5 is a cross-sectional view of a pouch-type battery cell according to a comparative example.
- Figure 6 is a flowchart of a method for manufacturing a pouch-type battery cell according to a fourth embodiment of the present invention.
- Figure 1 is a perspective view showing a case and an electrode assembly of a pouch-type battery cell according to a first embodiment of the present invention
- Figure 2 is a cross-sectional view of a pouch-type battery cell according to a first embodiment of the present invention.
- the pouch-type battery cell 10 may include a pair of cases 100 and an electrode assembly 200 accommodated between the pair of cases 100.
- the pair of cases 100 may be sealed to accommodate the electrode assembly 200 together with the electrolyte to form a pouch-type battery cell 10.
- the electrode assembly 200 may include an anode, a cathode, and a separator interposed between the anode and the cathode to insulate them.
- the type of electrode assembly 10 is not limited.
- the electrode assembly 200 may be a stacked electrode assembly in which an anode and a cathode are alternately stacked with a separator in between.
- the electrode assembly 200 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 pair of cases 100 provide a storage space for accommodating the electrode assembly 200 and may have an overall pouch shape.
- One side of the pair of cases 100 is connected to each other, and the connected portion may form the folding portion 105. That is, the pair of cases 100 can be integrally connected by the folding portion 105. However, it is not limited to this, and of course, it is possible for the pair of cases 100 to be separate members.
- Each case 100 may include a first resin layer 101, a second resin layer 102, and a metal layer 103. That is, the case 100 can be manufactured by molding a laminate film including the first resin layer 101, the second resin layer 102, and the metal layer 103.
- the first resin layer 101 may form the innermost layer of the case 100.
- the first resin layer 101 located in the cup portion 110 of the pair of cases 100 may be in direct contact with or adjacent to the electrode assembly 200 and the electrolyte solution. Therefore, the first resin layer 101 can have high insulation and corrosion resistance.
- the first resin layer 101 may include polypropylene (PP) material.
- PP polypropylene
- the first resin layer 101 located on the edge portion 120 of the pair of cases 100 may be sealed to each other to form an insulating sealing portion 140. This will be explained in detail later.
- the second resin layer 102 may form the outermost layer of the case 100.
- the second resin layer 102 can protect the pouch-type battery cell 10 from friction and collision with the outside and electrically insulate the electrode assembly 200 from the outside.
- the second resin layer 102 may include polyethylene terephthalate (PET).
- PET polyethylene terephthalate
- the metal layer 103 may be laminated between the first resin layer 101 and the second resin layer 102.
- the metal layer 103 can secure the mechanical strength of the case 100, block the entry and exit of external gas or moisture, and prevent electrolyte leakage.
- the metal layer 103 may include stainless steel (STS) material. Since the melting point of stainless steel is approximately 1400°C, it can have high heat resistance compared to aluminum (Al) used in conventional pouch-type battery cells.
- STS stainless steel
- the metal layers 103 located on the edge portion 120 of the pair of cases 100 may be sealed to each other to form the metal sealing portion 150. This will be explained in detail later.
- a cup portion 110 that accommodates the electrode assembly 200 may be formed in at least one of the pair of cases 100 .
- the cup portion 110 may be recessed and molded into a laminate film, which is the base material of the case 100.
- a cup portion 110 may be formed in each of the pair of cases 100.
- the electrode assembly 200 may be accommodated in a receiving space formed by a pair of cup parts 110 communicating with each other.
- the pair of cases 100 may include an edge portion 120 located around the cup portion 110.
- the edge portion 120 may be referred to as a terrace portion.
- the edge portions 120 of the pair of cases 100 may be sealed in a state of contact with each other, and thus the electrode assembly 200 may be sealed within the pair of cases 100 .
- the folding portion 105 may be folded so that the edge portions 120 of the pair of cases 100 come into contact with each other.
- the edges 120 in contact with each other may form three sides of the pouch-type battery cell 10, and the folding part 105 may form the remaining side.
- the pouch-type battery cell 10 may have sealing portions 140 and 150 formed on three sides.
- the edge portions 120 of the pair of cases 100 may be arranged to contact each other.
- the edge portions 120 that come into contact with each other may form four sides of the pouch-type battery cell 10.
- the pouch-type battery cell 10 may have sealing portions 140 and 150 formed on four sides.
- the pouch-type battery cell 10 has a folded portion 130 in which the edge 120 of one case 100A of the pair of cases 100 is folded to surround the edge 120 of the other case 100B. ) may include.
- the edge portion 120 of one case 100A may be hemmed along the end of the edge portion 120 of the other case 100B. To this end, the edge portion 120 of one case 100A may be formed to be wider than the edge portion 120 of the other case 100B. In more detail, the edge portion 120 of one case 100A may be formed to be longer in the full length and full width directions than the edge portion 120 of the other case 100B.
- the first line (L1) and the second line (L2) shown in FIG. 1 are exemplary indications of lines folded in hemming processing.
- the first line L1 may be parallel to the full-length direction of the pouch-type battery cell 10
- the second line L2 may be parallel to the full-width direction of the pouch-type battery cell 10.
- the first line L1 and the second line L2 may correspond to the ends of the edge portion 120 of the other case 100B.
- the first line (L1) and the second line (L2) can be folded sequentially or in reverse order.
- the corner portion of the edge portion 120 of the case 100A where the first line L1 and the second line L2 overlap may be double folded. However, it is not limited to this, and a person skilled in the art will be able to cut the corner portion into an appropriate shape.
- the pouch-type battery cell 10 may include an insulating sealing part 140 and a metal sealing part 150.
- the insulating sealing portion 140 may be formed by sealing the first resin layers 101 of the pair of cases 100 with each other.
- the first resin layer 101 of the edge portion 120 of the pair of cases 100 may be heat-sealed to each other to form the insulating sealing portion 140.
- the insulating sealing portion 140 may be formed inside the folded portion 130 or may overlap a portion of the inner side of the folded portion 130.
- the insulating sealing portion 140 may be formed long along the edge portion 120 of the pair of cases 100 .
- the insulating sealing part 140 may be connected to the first resin layer 101 in the cup part 110. Accordingly, the electrode assembly 200 and the electrolyte solution within the cup portion 110 can be sealed in an insulated state by the insulating sealing portion 140.
- the metal sealing portion 150 may be formed by sealing the metal layers 103 of a pair of cases 100 with each other.
- the metal layers 103 of the edge portion 120 of the pair of cases 100 may be welded to each other to form the metal sealing portion 150.
- the metal sealing portion 150 may be formed to be long along the folded portion 130 .
- the metal sealing part 150 may be located outside the insulating sealing part 140.
- the metal sealing portion 150 is welded to the metal layers 103, it may have a higher sealing strength than the insulating sealing portion 140 in which the first resin layers 101 are fused together. As a result, the sealing strength of the pouch-type battery cell 10 can be significantly increased.
- the metal sealing part 150 may be formed in the folded part 130.
- the metal sealing portion 150 may be formed by laser welding the metal layers 103 of the folded portion 130 to each other while the folded portion 130 is formed. Accordingly, the metal sealing portion 150 can be double sealed.
- the laser beam for forming the metal sealing portion 150 may be irradiated from one side of the folded portion 130, and the irradiation direction is not limited.
- the laser beam may be irradiated from the upper or lower side of the folded portion 130.
- the metal sealing part 150 is a first metal sealing part in which one surface (for example, the upper surface) of the metal layer 103 of another case 100B is sealed with the metal layer 103 of one case 100A. (151) and the other surface (e.g., lower surface) of the metal layer 103 of the other case 100B may include a second metal sealing portion 152 sealed with the metal layer 103 of one case 100A. there is.
- the metal sealing portion 150 is double formed on the folded portion 130, so that the sealing strength of the pouch-type battery cell 10 can be further increased. Additionally, compared to the case where the folded portion 130 is not formed, the ratio of the gap between the metal layers 103 to the thickness of the folded portion 130 is reduced, so there is an advantage that the quality of laser welding can be improved.
- the first resin layer 101 and the second resin layer 102 may be excluded from the metal sealing portion 150.
- the edge 120 of the pair of cases 100 forming the folded portion 130 excludes the first resin layer 101 and the second resin layer 102, and the metal layer 103 is formed on the inner and inner sides. It may include an exposed area exposed to the outside.
- the folded portion 130 may be formed by folding the exposed area of one case 100A to surround the exposed area of the other case 100B. That is, the folded portion 130 may be formed by folding the metal layer 103 of one case 100A to surround the metal layer 103 of the other case 100B.
- Figure 3 is a cross-sectional view of a pouch-type battery cell according to a second embodiment of the present invention.
- the cup portion 110 may not be formed in one of the pair of cases 100.
- the cup portion may not be formed in one case 100A, and the cup portion 110 may be formed in the other case 100B.
- the edge portion 120 of one case 100A may be located around a portion facing the cup portion 110 of the other case 100B.
- the edge portion 120 of one case 100A may be folded to surround the edge portion 120 of the other case 100B to form the folded portion 130.
- it is not limited to this, and of course, it is also possible to form the folded portion 130 by folding the edge portion 120 of another case 100B to surround the edge portion 120 of one case 100A.
- first resin layer 101 of the edge portion 120 of the pair of cases 100 may be heat-sealed to each other to form the insulating sealing portion 140, and the metal layer 103 of the folded portion 130 may be formed. may be welded together to form the metal sealing portion 150.
- the sealing portions 140 and 150 the content described above is used.
- Figure 4 is an enlarged cross-sectional view of the folded portion of the pouch-type battery cell according to the third embodiment of the present invention.
- the second resin layer 102 may be excluded from either outer surface of the folded portion 130 on either side.
- the second resin layer 102 may be excluded from one side including the end of one case 100A (the upper side with respect to FIG. 4) among both outer surfaces of the folded portion 130, and the second resin layer 102 may be excluded from the opposite side.
- the lower surface may include a second resin layer 102. That is, while in the first embodiment described above, the second resin layer 102 is excluded from both outer surfaces of the folded portion 130, in the present embodiment, the second resin layer is present on either outer surface of the folded portion 130. The difference is that 102 is included.
- the laser beam for forming the metal sealing portion 150 may be irradiated to one side of both outer surfaces of the folded portion 130 from which the second resin layer 102 is excluded. Accordingly, damage to the second resin layer 102 can be minimized during the process of forming the metal sealing portion 150 by welding the metal layers 103 of the folded portion 130 to each other.
- Figure 5 is a cross-sectional view of a pouch-type battery cell according to a comparative example.
- the pouch-type battery cell 10' according to the comparative example includes an insulating sealing portion 140 in which the first resin layer 101 of the edge portion 120 of the pair of cases 100 is heat-fused to each other, and a metal layer. (103) The metal sealing portion 150 welded together may not be included.
- the insulating sealing portion 140 is formed by heat fusion of the first resin layers 101, it may be vulnerable to high temperatures.
- the first resin layer 101 includes polypropylene (PP)
- the insulating sealing portion 140 may melt at a temperature of approximately 150°C. Accordingly, if the critical temperature is exceeded due to abnormal heat generation of the electrode assembly 200, the temperature rapidly rises to approximately 1000°C or higher, and there is a risk that the seal of the pouch-type battery cell 10' may be destroyed due to this.
- PP polypropylene
- the pouch-type battery cell 10 includes a double-sealed metal sealing portion 150 at the folded portion 130, so even if the insulating sealing portion 140 melts, the pouch-type battery cell 10 ) sealing can be maintained.
- the metal sealing part 150 may have a higher sealing strength than the insulating sealing part 140.
- the metal sealing part 150 when the metal layer 103 forming the metal sealing part 150 includes a stainless steel material, the metal sealing part 150 can maintain sealing without melting up to a temperature of approximately 1400°C. As a result, it is possible to prevent or sufficiently delay the occurrence of thermal propagation (TP) to other battery cells around the pouch-type battery cell 10.
- TP thermal propagation
- Figure 6 is a flowchart of a method for manufacturing a pouch-type battery cell according to a fourth embodiment of the present invention.
- the pouch-type battery cell manufacturing method according to the fourth embodiment of the present invention may be the method of manufacturing the pouch-type battery cell 10 described above.
- the pouch-type battery cell manufacturing method includes a step (S10) of accommodating the electrode assembly 200 in the cup portion 110 formed in at least one of a pair of cases 100 (hereinafter, accommodating step), and a pair of cases 100.
- a step (S20) of sealing the first resin layer 101 of (100) hereinafter, an insulating sealing step
- a step (S30) of forming a folded portion 130 by folding it to surround the edge portion 120 of 100B hereinafter referred to as a processing step
- a step (S40) of sealing the metal layers 103 in the folded portion 130 may be included.
- the edge portions 120 of the pair of cases 100 may come into contact with each other while the electrode assembly 200 is accommodated in the cup portion 110. As a result, the electrode assembly 200 can be accommodated between the pair of cases 100.
- the first resin layer 101 of the edge portion 120 of the pair of cases 100 may be heat-sealed to each other to form the insulating sealing portion 140.
- the exposed area of one case 100A may be folded to surround the exposed area of the other case 100B.
- the exposed area may refer to an area where the first resin layer 101 is excluded from the edge portion 120 of each case 100 and the metal layer 103 is exposed inward. Additionally, the second resin layer 102 may be excluded from at least a portion of the exposed area and the metal layer 103 may be exposed to the outside.
- the processing step (S30) may include a process of compressing the double folded corner portion. This can prevent the corner portion from becoming unnecessarily thick.
- the metal layers 103 of the folded portion 130 may be laser welded to each other to form the metal sealing portion 150.
- the laser may be irradiated to one side of both outer surfaces of the folded portion 130 from which the second resin layer 102 is excluded.
- the metal sealing portion 150 includes a first metal sealing portion 151 in which one surface (e.g., the upper surface) of the metal layer 103 of the other case 100B is sealed with the metal layer 103 of one case 100A.
- the other surface (eg, lower surface) of the metal layer 103 of the other case 100B may be formed to include a second metal sealing portion 152 sealed with the metal layer 103 of one case 100A.
- processing step (S30) and the metal sealing step (S40) may be performed sequentially. However, the order in which the insulation sealing step (S20) is performed may be changed as needed.
- the insulation sealing step (S20), the processing step (S30), and the metal sealing step (S40) may be performed sequentially.
- the insulation sealing step (S20) may be performed after the processing step (S30) and the metal sealing step (S40).
- the insulation sealing step (S20) may be performed between the processing step (S30) and the metal sealing step (S40).
- first resin layer 102 second resin layer
- first metal sealing part 152 second metal sealing part
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Optics & Photonics (AREA)
- Inorganic Chemistry (AREA)
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- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
Claims (10)
- 최내층을 이루는 제1수지층, 최외층을 이루는 제2수지층 및 상기 제1수지층과 제2수지층의 사이에 적층된 금속층을 포함하는 한 쌍의 케이스 사이에 전극 조립체가 수용된 파우치형 전지셀에 있어서,상기 한 쌍의 케이스 중 적어도 하나에 형성되며 상기 전극 조립체를 수용하는 컵부;상기 한 쌍의 케이스의 상기 제1수지층끼리 실링된 절연 실링부;상기 한 쌍의 케이스 중 일 케이스의 가장자리부가 타 케이스의 가장자리부를 감싸도록 접힌 접힘부; 및상기 접힘부에 형성되며 상기 한 쌍의 케이스의 상기 금속층끼리 실링된 금속 실링부를 포함하는 파우치형 전지셀.
- 제 1 항에 있어서,상기 금속 실링부는 상기 절연 실링부보다 외측에 위치하는 파우치형 전지셀.
- 제 1 항에 있어서,상기 금속 실링부는,상기 타 케이스의 금속층의 일면이 상기 일 케이스의 금속층과 실링된 제1금속 실링부; 및상기 타 케이스의 금속층의 타면이 상기 일 케이스의 금속층과 실링된 제2금속 실링부를 포함하는 파우치형 전지셀.
- 제 1 항에 있어서,상기 금속 실링부에는 상기 제1수지층 및 제2수지층이 배제된 파우치형 전지셀.
- 제 1 항에 있어서,상기 금속 실링부에서 상기 제1수지층은 배제되고,상기 제2수지층은, 상기 접힘부의 양측 외면 중 어느 하나에서 배제된 파우치형 전지셀.
- 제 1 항에 있어서,상기 금속층은 스테인리스 스틸 재질을 포함하는 파우치형 전지셀.
- 최내측의 제1수지층, 최외측의 제2수지층 및 상기 제1수지층과 제2수지층의 사이에 적층된 금속층을 포함하는 한 쌍의 케이스 사이에 전극 조립체가 수용된 파우치형 전지셀의 제조 방법에 있어서,상기 한 쌍의 케이스 중 적어도 하나에 형성된 컵부에 상기 전극 조립체를 수용하는 단계;상기 한 쌍의 케이스의 상기 제1수지층끼리 실링하는 단계;상기 한 쌍의 케이스 중 일 케이스의 가장자리부를 타 케이스의 가장자리부를 감싸도록 접어 접힘부를 형성하는 단계; 및상기 접힘부에서 상기 금속층끼리 실링하는 단계를 포함하는 파우치형 전지셀 제조 방법.
- 제 7 항에 있어서,상기 제1수지층끼리 실링하는 단계 시, 상기 제1수지층은 서로 열융착되고상기 금속층끼리 실링하는 단계 시, 상기 금속층은 서로 레이저 용접되는 파우치형 전지셀 제조 방법.
- 제 7 항에 있어서,상기 한 쌍의 케이스의 가장자리부는, 상기 제1수지층이 배제되고 상기 금속층이 내측으로 노출되는 노출 영역을 포함하고,상기 접힘부를 형성하는 단계 시 상기 일 케이스의 노출 영역이 상기 타 케이스의 노출 영역을 감싸는 파우치형 전지셀 제조 방법.
- 제 7 항에 있어서상기 금속층끼리 실링하는 단계 시, 레이저는 상기 접힘부의 양측 외면 중 상기 제2수지층이 배제된 일 면에 조사되는 파우치형 전지셀 제조 방법.
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| JP2025501673A JP2025525532A (ja) | 2022-07-15 | 2023-07-12 | パウチ型電池セル及びその製造方法 |
| EP23840033.7A EP4539220A4 (en) | 2022-07-15 | 2023-07-12 | POCKET-TYPE BATTERY ELEMENT AND ITS MANUFACTURING PROCESS |
| CA3261428A CA3261428A1 (en) | 2022-07-15 | 2023-07-12 | POCKET-TYPE BATTERY ELEMENT AND ITS MANUFACTURING PROCESS |
| CN202380052158.0A CN119631229A (zh) | 2022-07-15 | 2023-07-12 | 软包型电池单体和该软包型电池单体的制造方法 |
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| KR1020220087829A KR102655291B1 (ko) | 2022-07-15 | 2022-07-15 | 파우치형 전지셀 및 그 제조방법 |
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| EP (1) | EP4539220A4 (ko) |
| JP (1) | JP2025525532A (ko) |
| KR (1) | KR102655291B1 (ko) |
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| WO2026066085A1 (zh) * | 2024-09-29 | 2026-04-02 | 宁德时代新能源科技股份有限公司 | 固态电池单体及其制造方法 |
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| KR20250154804A (ko) * | 2024-04-22 | 2025-10-29 | 주식회사 엘지에너지솔루션 | 전지 셀 및 그 제조 방법 |
| KR20260027554A (ko) * | 2024-08-21 | 2026-03-03 | 주식회사 엘지에너지솔루션 | 이차전지 및 이의 제조방법 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000223090A (ja) * | 1999-02-02 | 2000-08-11 | Matsushita Electric Ind Co Ltd | 電 池 |
| JP2004095217A (ja) * | 2002-08-29 | 2004-03-25 | Nissan Motor Co Ltd | 電池外装用ラミネート材、電池およびその製造方法、ならびに組電池、組電池モジュール |
| KR20140133569A (ko) * | 2012-03-05 | 2014-11-19 | 신닛테츠스미킹 마테리알즈 가부시키가이샤 | 수지 금속 복합 실 용기 및 그의 제조 방법 |
| KR20150110983A (ko) * | 2014-03-24 | 2015-10-05 | 에스케이이노베이션 주식회사 | 방습성이 개선된 이차전지용 파우치 |
| KR20200114385A (ko) * | 2019-03-28 | 2020-10-07 | 주식회사 엘지화학 | 파우치형 이차전지 및 그 제조방법 |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3070035U (ja) | 1999-12-28 | 2000-07-14 | パイオニクス株式会社 | カ―ド型二次電池のケ―シング |
| JP2004055154A (ja) | 2002-07-16 | 2004-02-19 | Nissan Motor Co Ltd | 積層型電池の密封構造および密封処理方法 |
| KR20040048295A (ko) | 2002-12-02 | 2004-06-07 | 히다치 막셀 가부시키가이샤 | 전지 |
| JP2005045180A (ja) | 2003-07-25 | 2005-02-17 | Tdk Corp | 電気化学素子 |
| KR100879893B1 (ko) * | 2006-07-10 | 2009-01-21 | 주식회사 엘지화학 | 실링부의 안전성이 향상된 이차전지 |
| JP5303974B2 (ja) | 2008-03-14 | 2013-10-02 | 日本電気株式会社 | 組電池 |
| KR101002468B1 (ko) | 2008-07-01 | 2010-12-17 | 삼성에스디아이 주식회사 | 파우치형 리튬 이차전지 |
| KR101216422B1 (ko) * | 2010-10-15 | 2012-12-28 | 주식회사 엘지화학 | 실링부의 절연성이 향상된 이차전지 |
| US20150118543A1 (en) * | 2012-05-14 | 2015-04-30 | Eig Ltd. | Pouch-type battery with improved safety by coating sealing unit with flame retardant and heat resistant resin composition prepared by mixing flame retardant material and heat resistant material to thermoplastic resin or thermosetting resin and production method thereof |
| KR101884410B1 (ko) | 2012-08-07 | 2018-08-02 | 에스케이이노베이션 주식회사 | 전지팩 |
| KR20140110444A (ko) | 2013-03-08 | 2014-09-17 | 현대모비스 주식회사 | 차량의 외부 배터리팩의 결합구조 및 방법 |
| KR102023736B1 (ko) | 2016-01-05 | 2019-09-20 | 주식회사 엘지화학 | 파우치 외장재, 이를 포함하는 이차전지, 및 이의 제조방법 |
| KR102178726B1 (ko) | 2016-07-29 | 2020-11-13 | 주식회사 엘지화학 | 이차전지용 파우치 외장 부재 및 이를 포함하는 파우치형 이차전지 |
| WO2018235516A1 (ja) | 2017-06-19 | 2018-12-27 | 株式会社村田製作所 | 二次電池 |
| KR102143627B1 (ko) | 2017-11-21 | 2020-08-11 | 삼성에스디아이 주식회사 | 파우치 타입 이차 전지 |
| CN111989794B (zh) | 2018-04-19 | 2023-03-24 | 株式会社村田制作所 | 二次电池 |
| WO2022124310A1 (ja) | 2020-12-07 | 2022-06-16 | 大日本印刷株式会社 | 蓄電デバイス用外装材、その製造方法、及び蓄電デバイス |
-
2022
- 2022-07-15 KR KR1020220087829A patent/KR102655291B1/ko active Active
-
2023
- 2023-07-12 WO PCT/KR2023/095027 patent/WO2024014942A1/ko not_active Ceased
- 2023-07-12 US US18/221,102 patent/US12009530B2/en active Active
- 2023-07-12 CA CA3261428A patent/CA3261428A1/en active Pending
- 2023-07-12 JP JP2025501673A patent/JP2025525532A/ja active Pending
- 2023-07-12 CN CN202380052158.0A patent/CN119631229A/zh active Pending
- 2023-07-12 EP EP23840033.7A patent/EP4539220A4/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000223090A (ja) * | 1999-02-02 | 2000-08-11 | Matsushita Electric Ind Co Ltd | 電 池 |
| JP2004095217A (ja) * | 2002-08-29 | 2004-03-25 | Nissan Motor Co Ltd | 電池外装用ラミネート材、電池およびその製造方法、ならびに組電池、組電池モジュール |
| KR20140133569A (ko) * | 2012-03-05 | 2014-11-19 | 신닛테츠스미킹 마테리알즈 가부시키가이샤 | 수지 금속 복합 실 용기 및 그의 제조 방법 |
| KR20150110983A (ko) * | 2014-03-24 | 2015-10-05 | 에스케이이노베이션 주식회사 | 방습성이 개선된 이차전지용 파우치 |
| KR20200114385A (ko) * | 2019-03-28 | 2020-10-07 | 주식회사 엘지화학 | 파우치형 이차전지 및 그 제조방법 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4539220A4 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2026066085A1 (zh) * | 2024-09-29 | 2026-04-02 | 宁德时代新能源科技股份有限公司 | 固态电池单体及其制造方法 |
Also Published As
| Publication number | Publication date |
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| CN119631229A (zh) | 2025-03-14 |
| US12009530B2 (en) | 2024-06-11 |
| EP4539220A4 (en) | 2025-11-12 |
| KR20240010354A (ko) | 2024-01-23 |
| EP4539220A1 (en) | 2025-04-16 |
| JP2025525532A (ja) | 2025-08-05 |
| KR102655291B1 (ko) | 2024-04-08 |
| US20240021927A1 (en) | 2024-01-18 |
| CA3261428A1 (en) | 2025-04-24 |
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