WO2024106900A1 - 열압착 마감 테이프 - Google Patents
열압착 마감 테이프 Download PDFInfo
- Publication number
- WO2024106900A1 WO2024106900A1 PCT/KR2023/018233 KR2023018233W WO2024106900A1 WO 2024106900 A1 WO2024106900 A1 WO 2024106900A1 KR 2023018233 W KR2023018233 W KR 2023018233W WO 2024106900 A1 WO2024106900 A1 WO 2024106900A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- adhesive layer
- adhesive
- protective member
- finishing tape
- substrate
- 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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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/403—Adhesives in the form of films or foils characterised by release liners characterised by the structure of the release feature
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/405—Adhesives in the form of films or foils characterised by release liners characterised by the substrate of the release liner
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
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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
- H01M50/197—Sealing members characterised by the material having a layered 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
- H01M50/19—Sealing members characterised by the material
- H01M50/198—Sealing members characterised by the material characterised by physical properties, e.g. adhesiveness or hardness
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/33—Applications of adhesives in processes or use of adhesives in the form of films or foils for batteries or fuel cells
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
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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 heat-compressed finishing tape.
- secondary batteries refer to batteries that can be charged and discharged, unlike primary batteries that cannot be recharged. These secondary batteries are widely used in the field of advanced electronic devices such as phones, laptop computers, and camcorders.
- the stability of secondary batteries can be ensured through a stability test that measures internal short circuits by compressing one side with a press.
- secondary batteries include cylindrical batteries and square batteries in which the electrode assembly is built into a cylindrical or square metal can, and pouch case-type batteries in which the electrode assembly is built in a pouch case-type case of aluminum laminate sheet. are classified.
- the electrode assembly In a pouch-type lithium-ion secondary battery (polymer battery), the electrode assembly is placed in a pouch-shaped battery case. When an impact is applied to the battery due to a drop, etc., the electrode assembly flows within the pouch, which causes the electrode to bend, causing short circuit, ignition, etc. Phenomenon such as explosion may occur. Accordingly, a finishing tape with a special function must be placed between the electrode assembly and the pouch to prevent the electrode assembly from moving within the pouch even if an impact is applied to the battery.
- the finishing tape used in pouch-type secondary batteries is an adhesive coated with an acrylic pressure sensitive adhesive (PSA) and a hot melt adhesive on both sides of a polypropylene (PP) or polyethylene terephthalate (PET) film substrate, respectively. It includes a layer and an adhesive layer. Additionally, the finishing tape may have a protective tape attached to one side of each of the adhesive layer and the adhesive layer to protect the adhesive layer and the adhesive layer.
- PSA acrylic pressure sensitive adhesive
- PET polyethylene terephthalate
- the protective tape attached to one side of the adhesive layer is removed to adhere the finishing tape to the electrode assembly, and then the protective tape attached to one side of the adhesive layer is removed to adhere the adhesive layer and the pouch.
- the present invention seeks to provide a heat-compression finishing tape that prevents the external shape of the electrode assembly from being deformed.
- One embodiment of the present invention is described; An adhesive layer laminated on one side of the substrate; An adhesive layer laminated on the other side of the substrate; A first protective member provided on one side of the adhesive layer to face the substrate and a second protective member provided on one side of the adhesive layer to face the substrate, wherein the second protective member is located on at least one end of the adhesive layer.
- thermo-compression finishing tape in which the first protective member and the second protective member include a porous film, and one surface of the porous film is subjected to a release treatment.
- One embodiment of the present invention provides a heat-compression finishing tape in which an auxiliary adhesive layer is laminated on a side of the second protective member opposite to the adhesive layer.
- the second protective member includes an adhesive portion in direct contact with the adhesive layer and a protrusion protruding outward from an end of the adhesive layer, and the protrusion extends once toward the center of the second protective member.
- a heat-compressed finishing tape that can be folded as described above.
- One embodiment of the present invention provides a heat-pressed finishing tape in which a portion of the adhesive portion in contact with an edge of the adhesive layer is detached from the second protective member.
- One embodiment of the present invention provides a heat-pressed finishing tape in which the adhesive layer is at least one selected from the group consisting of a rubber adhesive, an acrylic adhesive, and a silicone adhesive.
- thermocompression finishing tape in which the melting temperature of the adhesive layer is less than 140°C.
- One embodiment of the present invention provides a heat-compression finishing tape in which the adhesive layer includes any one or more of a hot melt adhesive, a heat-activated adhesive, and a pressure-sensitive adhesive.
- One embodiment of the present invention provides a heat-compression finishing tape in which the substrate has insulating properties.
- the substrate includes a polymer resin film
- the polymer resin is polyethylene (PE), polyphenylene ether (PPE), polyimide (PI), polypropylene (PP), and polyethylene terephthalate ( Provides a heat-compression finishing tape containing one or more of PET).
- the protective member located on one side of the adhesive layer is provided with a length or width wider than the adhesive layer, the base material, and the adhesive layer, so that the protective member can be easily removed.
- the protective member includes a porous structure, the adhesive force with the adhesive layer can be reduced, making it easier to remove the protective member.
- Figure 1 is a cross-sectional view showing a thermocompression finishing tape according to an exemplary embodiment of the present invention.
- Figure 2 is a plan view showing an electrode assembly to which a thermocompression finishing tape is attached according to an exemplary embodiment of the present invention.
- Figure 3 is a flowchart showing a process of attaching a thermocompression finishing tape to an electrode assembly according to an embodiment of the present invention.
- Figure 4 is a cross-sectional view showing an electrode assembly according to an exemplary embodiment of the present invention.
- Figure 5 is a perspective view showing a secondary battery according to an exemplary embodiment of the present invention.
- Figure 1 is a cross-sectional view showing a heat-compression finishing tape 300 according to an embodiment of the present invention
- Figure 2 is an electrode assembly 100 to which the heat-compression finishing tape 300 according to an embodiment of the present invention is attached.
- FIG. 4 is a cross-sectional view showing the electrode assembly 100 according to an exemplary embodiment of the present invention
- FIG. 5 is a perspective view showing a secondary battery 1000 according to an exemplary embodiment of the present invention.
- the thermocompression finishing tape 300 includes a base material 310, an adhesive layer 320, an adhesive layer 330, a first protective member 340, and a second protective member 350.
- the thermo-compression finishing tape 300 may have an adhesive layer 320 and an adhesive layer 330 applied to both sides of the substrate with the substrate 310 interposed therebetween.
- the substrate 310 may be provided in the form of a plate or film.
- the substrate 310 may have insulating properties to prevent the electrode assembly 100 and the case 200 from being electrically conductive through the thermocompression finishing tape 300 .
- the substrate 310 may include a polymer resin film, and the polymer resin may include polyethylene (PE), polyphenylene ether (PPE), polyimide (PI), polypropylene (PP), and polyethylene terephthalate ( PET) may be included.
- the substrate 310 may include the same material as the separator 130 of the electrode assembly 100.
- the adhesive layer 320 is formed by applying an adhesive material to one surface of the substrate 310, and can adhere the heat-compression finishing tape 300 to the electrode assembly 100 by directly contacting the electrode assembly 100.
- the adhesive layer 320 includes a pressure-sensitive adhesive.
- the pressure-sensitive adhesive may be one or more selected from the group consisting of rubber-based adhesives, acrylic adhesives, and silicone adhesives.
- the adhesive layer may include an acrylic adhesive.
- acrylic adhesives include butyl acrylate, ethyl acrylate, methyl methacrylate, vinyl acrylate, 2-ethylhexyl acrylate, hydroxyethyl acrylate, hydroxyethylmethyl acrylate, and glycidyl methacrylate. , triethylene glycol dimethacrylate, and acrylic acid.
- the adhesive layer 330 is formed by applying an adhesive material to the other side of the substrate 310, that is, the side of both sides of the substrate 310 on which the adhesive layer 320 is not applied.
- the adhesive layer 330 and the adhesive layer 320 are provided at opposing positions with the substrate 310 sandwiched between them.
- the adhesive layer 330 can directly contact the inner surface of the case 200 to adhere the heat-compression finishing tape 300 to the case 200.
- the adhesive layer 330 may include a material having thermal adhesiveness depending on the sealing temperature of the case 200.
- the adhesive layer 330 may include one or more of a hot melt adhesive, a heat-activated adhesive, and a pressure-sensitive adhesive.
- the adhesive layer 330 may include a hot melt adhesive.
- the adhesive layer 330 may be made of thermoplastic resin to exert adhesive force using heat.
- thermoplastic resins include polyolefin-based resin, polyvinylchloride-based resin, EVA (Ethylene-Vinyl Acetate copolymer-based) resin, polyamide-based resin, polyester-based resins, silicone rubbers, and copolymers containing them; and a thermoplastic resin having an ionomer structure.
- the melting temperature of the adhesive layer 330 may be less than 140°C.
- the melting temperature of the adhesive layer 330 is less than 130°C, more preferably less than 100°C.
- the secondary battery 1000 according to the present invention is made by inserting the electrode assembly 100 into the lower case 210, covering the lower case 210 with the upper case 220, and heating and pressurizing (or thermocompressing) the case 200. ) can be sealed. At this time, the thermocompression temperature of the case 200 is 100°C to 130°C.
- the adhesive layer 330 is melted in a liquid state by the heat compression temperature of the case 200, and after heat compression, it cools and solidifies by dissipating heat to the surroundings, thereby exerting adhesive force.
- the melting temperature of the adhesive layer 330 is measured by measuring the force (adhesion force) required when peeling the finishing tape specimen from the pouch at 180° at a speed of 300 ⁇ 30 mm/min using a universal testing machine (UTM) to determine whether the adhesion force is reduced or The temperature that did not appear was measured.
- UPM universal testing machine
- the heat compression finishing tape 300 is cut to 1 inch in width and 1500 mm in length, and the adhesive layer 330 is attached to the aluminum electrode plate, and then heat attached to the aluminum electrode plate with a block heated to less than 140°C.
- the pressing finishing tape was pressed.
- the force (adhesion) required to peel the finishing tape specimen from the pouch at 180° at a speed of 300 ⁇ 30 mm/min was measured using a universal testing machine (UTM).
- the first protective member 340 is laminated on one side of the adhesive layer 320 and is provided at a position opposite to the substrate 310.
- the second protection member 350 is laminated on one side of the adhesive layer 330 and is provided at a position opposite to the substrate 310.
- one side of the adhesive layer 320 and one side of the adhesive layer 330 refer to the side of the adhesive layer 330 on which the substrate 310 is not located.
- the first protective member 340 and the second protective member 350 can protect the adhesive layer 320 and the adhesive layer 330.
- the first protective member 340 and the second protective member 350 are used to secure the adhesive layer 320 and the adhesive layer 330 to the inner surfaces of the electrode assembly 100 and the case 200, respectively. ) and must be easy to separate from the adhesive layer 330.
- the first protective member 340 and the second protective member 350 may be subjected to release treatment on the surfaces facing the adhesive layer 320 and the adhesive layer 330. Release treatment may mean that a physical and/or chemical surface treatment is applied to the surface.
- the surface of the protective film may have an uneven surface or may be coated with a silicone-based release agent together or independently.
- the first protective member 340 and the second protective member 350 reduce the adhesive/adhesion force with the adhesive layer 320 and the adhesive layer 330, It may include a porous structure to facilitate detachment. That is, the first protective member 340 and the second protective member 350 may include a porous film, and the porous film may be subjected to a release treatment on one side.
- the second protection member 350 may be provided to protrude outward from one end of the adhesive layer 330.
- the laminate of the adhesive layer 320, the substrate 310, and the adhesive layer 330 is provided in a square (square or rectangular) shape, and the second protective member 350 is located on one of the four sides of the laminate. It may protrude outward from the side.
- the outer direction means the direction opposite to the direction from the edge of the laminate to the center of the laminate.
- the second protection member 350 may protrude from the stack in the direction in which the ends of the positive electrode tab 111 and the negative electrode tab 121 of the electrode assembly 100 are located.
- the second protection member 350 may include an adhesive portion 351 in direct contact with the adhesive layer 330 and a protrusion 352 that protrudes outward from an end of the adhesive layer 330.
- the length refers to the length in the direction of the surface on which the positive electrode tab 111 and the negative electrode tab 121 are located in the electrode assembly 100 and the surface provided at a position opposite to the surface
- the width refers to the length perpendicular to the length. It means length in direction.
- the protrusion 352 may protrude 0.5 cm to 8 cm outward from the boundary with the adhesive portion 351. In other words, the protrusion 352 may protrude 0.5 cm to 8 cm in the outward direction from one end of the stack. Preferably, the protrusion 352 may protrude outwardly by 1 cm to 5 cm, more preferably by 1 cm to 3 cm.
- the second protection member 350 includes the protrusion 352, the second protection member 350 can be easily separated from the adhesive layer 330.
- the protrusion 352 of the second protection member 350 may be folded one or more times to increase ease of removal.
- the protrusion 352 may be folded and protruded one or more times toward the center of the second protection member 350.
- the protrusion 352 may form a certain angle with the other surface of the second protective member 350, that is, the surface on which the adhesive layer 330 is not located, and therefore, the thermocompression finishing tape 300 is attached to the electrode assembly 100.
- a detachment mechanism (not shown) that attaches to and detaches the second protection member 350 can easily grasp the second protection member 350.
- a portion of the adhesive portion 351 of the second protection member 350 that is in contact with the edge of the adhesive layer 330 may be detached.
- the second protection member 350 is separated from the adhesive layer 330 for a certain length from the boundary between the adhesive portion 351 and the protruding portion 352 toward the center of the second protection member 350, that is, toward the center of the laminate. It can be.
- the second protective member 350 may further include an auxiliary adhesive layer (not shown) coated with an adhesive material on a surface opposite to the adhesive layer 330, that is, a surface opposite to the surface in contact with the adhesive layer 330. there is.
- the auxiliary adhesive layer may include the same adhesive material as the adhesive layer 320.
- the auxiliary adhesive layer may increase the adhesion between the detachment mechanism and the second protective member 350, thereby increasing the ease of detachment of the second protective member 350. That is, the adhesive force between the second protective member 350 and the detachment mechanism may be greater than the adhesive force between the second protective member 350 and the adhesive layer 330.
- the electrode assembly 100 is a power generating element that includes an anode 110, a cathode 120, and a separator 130 located between the anode 110 and the cathode 120 and is capable of charging and discharging.
- the electrode assembly 100 may include a stacking/folding structure in which an anode 110 and a cathode 120 are sequentially stacked on a separator 130 folded in a zigzag shape.
- the positive electrode 110 may include a positive electrode current collector, a positive electrode active material portion, and a positive electrode tab.
- the positive electrode current collector is a thin metal plate with excellent conductivity and may include, for example, aluminum (Al) foil.
- the positive electrode 110 is coated with a positive active material on one or both sides of a plate-shaped positive current collector, and the uncoated portion not coated with the positive active material can be cut into a positive electrode tab shape to form the positive electrode tab 111.
- the positive electrode active material is lithium cobalt oxide with high operating voltage and excellent capacity characteristics, lithium nickel oxide with high reversible capacity and easy to implement large-capacity batteries, lithium nickel cobalt oxide in which part of nickel is replaced with cobalt, part of nickel in manganese, It may include lithium nickel cobalt metal oxide substituted with cobalt or aluminum, lithium manganese-based oxide with excellent thermal stability and low cost, and lithium iron phosphate with excellent stability.
- the negative electrode 120 may include a negative electrode current collector, a negative electrode active material portion, and a negative electrode uncoated portion.
- the negative electrode current collector may include a thin metal plate with excellent conductivity, for example, copper (Cu) or nickel (Ni) foil.
- the negative electrode 120 is formed by coating a negative electrode active material on one or both sides of a negative electrode current collector.
- the negative electrode active material portion is formed by coating or applying a negative electrode active material, and the negative electrode uncoated portion is cut into a negative electrode tab shape without coating or applying a negative electrode active material.
- a negative electrode tab 121 may be formed.
- the negative electrode active material may be, for example, crystalline carbon, amorphous carbon, carbon composite, carbon material such as carbon fiber, lithium metal, or lithium alloy.
- the negative electrode active material may further include, for example, non-graphite SiO (silica) or SiC (silicon carbide) for high capacity design.
- the positive electrode tab 111 and the negative electrode tab 121 transfer electrons collected in the current collector to an external circuit and may protrude in opposite directions or in the same direction from the electrode assembly of the stacked/folding structure.
- the area of the cathode 120 included in the electrode assembly according to the present invention may be larger than that of the anode 110. Therefore, by setting the area of the cathode 120 to be larger than the area of the corresponding anode 110, lithium can be prevented from precipitating on the cathode 120.
- the separator 130 prevents an internal short circuit that may occur when the anode 110 and the cathode 120 come into contact, and may include a porous material to facilitate the movement of ions between electrodes.
- the separator 130 may include a base layer made of a porous material.
- the base layer includes, for example, any one selected from the group consisting of polyethylene (PE), polystyrene (PS), polypropylene (PP), and a copolymer of polyethylene (PE) and polypropylene (PP). can do.
- the separator 130 may include a Safety Reinforced Separator (SRS) separator. That is, the separator 130 may include a base layer made of a porous material and a coating layer formed by applying a mixed slurry of inorganic particles and a binder polymer coated on the base layer. Preferably, the coating layer has a uniform pore structure formed by the pore structure included in the separator substrate itself, including ceramic particles, as well as the interstitial volume between the ceramic particles that are active layer components.
- SRS Safety Reinforced Separator
- the coating layer may include ceramic particles containing at least one selected from the group consisting of alumina, silica, TiO 2 , SiC, and MgAl 2 O 4 . By including such a coating layer, the safety of the electrode assembly can be enhanced. And, the coating layer may further include lithium salt.
- the electrode assembly 100 may include an internal anode 110a and an external anode 110b.
- the electrode assembly 100 may have a structure in which an external anode 110b is stacked on the outermost layer of a stack in which an anode and a cathode are stacked between separators 130 folded in a zigzag shape.
- the anode located between the separators 130 folded in a zigzag shape is the internal anode 110a
- the anode located at the top and bottom of the stack 101 is the external anode 110b.
- the internal positive electrode 110a may be coated with a positive active material on both sides of the positive electrode current collector
- the external positive electrode 110b may be coated with a positive active material on only one side of the positive current collector.
- the external anode 110b may have the same area as the internal anode 110a or may be smaller.
- the external positive electrode 110b includes a first surface coated with the positive electrode active material and a second surface not coated with the positive electrode active material.
- the external positive electrode 110b may include a first insulating member 112 located on the first side and covering the positive electrode active material and the positive electrode tab 111, and a second insulating member 113 located on the second side.
- thermocompression finishing tape 300 may be positioned on the second side of the external anode 110b located at the top of the laminate 101.
- the secondary battery 1000 includes an electrode assembly 100, a case 200, and a heat-compression finishing tape 300.
- Case 200 includes a lower case 210 in which the electrode assembly 100 is accommodated, and an upper case 220 coupled to the lower case 210.
- the case 200 can be divided into an upper case 220 and a lower case 210 by bending the middle of the rectangular pouch membrane formed as one piece.
- a receiving groove 211 to accommodate the electrode assembly 100 is formed in the lower case 210 through press processing, etc.
- a sealing portion 212 is formed for sealing with the upper case 220.
- the sealing portion 212 may be formed along one side and the remaining three sides where the upper case 220 and the lower case 210 are in integral contact.
- the case 200 includes two long sides where the upper case 220 and the lower case 210 face each other, and two short sides that face each other perpendicularly to the two long sides.
- first electrode lead 140 and the second electrode lead 150 of the electrode assembly 100 have the short side of the two short sides opposite the short side where the upper case 220 and the lower case 210 are connected. is withdrawn through At this time, insulating members (not shown) are attached to the first and second electrode leads 140 and 150, respectively, to prevent short circuits between the first and second electrode leads 140 and 150 and the case 200. can do.
- Figure 3 is a flowchart showing a secondary battery manufacturing process including an electrode assembly 100 to which a thermocompression finishing tape 300 is adhered according to an embodiment of the present invention.
- the secondary battery manufacturing process includes removing the first protective member 340 (S10), attaching the adhesive layer 320 to the electrode assembly 100, specifically the external anode 110b laminated on the top of the stack 101.
- a step of adhering to the second side of the electrode (S20), a step of detaching the second protection member 350 (S30), and the thermocompression finishing tape 300 is adhered to the receiving groove 211 of the lower case 210.
- the lower case 210 and the upper case 220 are combined to bond the adhesive layer 330 to the inner surface of the upper case 220 (S40), and the lower case 210 and the upper case are bonded to each other.
- a step of sealing the case 220 by thermocompression may be included (S50).
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Adhesive Tapes (AREA)
- Cell Separators (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
Claims (10)
- 기재;상기 기재 일면에 적층된 점착제층;상기 기재 타면에 적층된 접착제층;상기 점착제층 일면에 상기 기재와 대향하여 구비된 제1 보호 부재 및상기 접착제층 일면에 상기 기재와 대향하여 구비된 제2 보호 부재를 포함하고,상기 제2 보호 부재는 상기 접착제층의 적어도 일단부에서 외부 방향으로 돌출되어 구비된 열압착 마감 테이프.
- 제1항에 있어서, 상기 제1 보호 부재 및 상기 제2 보호 부재는 다공성 필름을 포함하고, 상기 다공성 필름 일면에 이형 처리가 되어 있는 것인 열압착 마감 테이프.
- 제1항에 있어서, 상기 제2 보호 부재는 상기 접착제층과 대향되는 면에 보조 점착층이 적층되는 것인 열압착 마감 테이프.
- 제1항에 있어서, 상기 제2 보호 부재는 상기 접착제층과 직접 접하는 접착부 및 상기 접착제층의 단부에서 외부로 돌출된 돌출부를 포함하고,상기 돌출부는 상기 제2 보호 부재의 중심 방향으로 한 번 이상 접히는 것인 열압착 마감 테이프.
- 제4항에 있어서, 상기 제2 보호 부재는 상기 접착제층의 가장자리와 접하는 상기 접착부의 일부가 탈리된 것인 열압착 마감 테이프.
- 제1항에 있어서, 상기 점착제층은 고무계 점착제, 아크릴 점착제 및 실리콘 점착제로 이루어진 군에서 선택된 하나 이상을 포함하는 것인 열압착 마감 테이프.
- 제1항에 있어서, 상기 접착제층의 용융 온도는 140℃ 미만인 것인 열압착 마감 테이프.
- 제7항에 있어서, 상기 접착제층은 핫 멜트(hot melt) 접착제, 열활성화 접착제 및 감압 접착제 중 어느 하나 이상을 포함하는 것인 열압착 마감 테이프.
- 제1항에 있어서, 상기 기재는 절연성을 갖는 것인 열압착 마감 테이프.
- 제9항에 있어서, 상기 기재는 고분자 수지 필름을 포함하고,상기 고분자 수지는 폴리에틸렌(PE), 폴리페닐렌에테르(PPE), 폴리이미드(PI), 폴리프로필렌(PP) 및 폴리에틸렌테레프탈레이트(PET) 중 어느 하나 이상을 포함하는 것인 열압착 마감 테이프.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2025525768A JP2025537720A (ja) | 2022-11-15 | 2023-11-14 | 熱圧着仕上げテープ |
| EP23891967.4A EP4588987A4 (en) | 2022-11-15 | 2023-11-14 | THERMAL COMPRESSION FINISHING TAPE |
| CN202380079522.2A CN120239734A (zh) | 2022-11-15 | 2023-11-14 | 热压终止胶带 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2022-0152836 | 2022-11-15 | ||
| KR1020220152836A KR20240071104A (ko) | 2022-11-15 | 2022-11-15 | 열압착 마감 테이프 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024106900A1 true WO2024106900A1 (ko) | 2024-05-23 |
Family
ID=91084882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2023/018233 Ceased WO2024106900A1 (ko) | 2022-11-15 | 2023-11-14 | 열압착 마감 테이프 |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4588987A4 (ko) |
| JP (1) | JP2025537720A (ko) |
| KR (1) | KR20240071104A (ko) |
| CN (1) | CN120239734A (ko) |
| WO (1) | WO2024106900A1 (ko) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000303031A (ja) * | 1999-04-21 | 2000-10-31 | Yahiro Rino | 積層粘着テ−プ |
| KR20120044199A (ko) * | 2010-10-27 | 2012-05-07 | 도레이첨단소재 주식회사 | 전자부품용 접착 조성물 및 전자부품용 접착 테이프 |
| KR20160143058A (ko) * | 2015-06-04 | 2016-12-14 | 주식회사 테이팩스 | 열압착 마감 테이프, 그 제조 방법 및 이를 포함하는 리튬이차전지 |
| KR20180087598A (ko) * | 2017-01-25 | 2018-08-02 | 김성철 | 돌출 파지부를 갖은 이형 테이프를 포함하는 필름 |
| KR20190098046A (ko) * | 2018-02-13 | 2019-08-21 | 닛토덴코 가부시키가이샤 | 점착 시트 및 점착 시트 적층체 |
| KR20220152836A (ko) | 2021-05-10 | 2022-11-17 | 덕산네오룩스 주식회사 | 수지, 수지 조성물 및 이를 이용한 표시장치 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6162534A (en) * | 1998-08-31 | 2000-12-19 | 3M Innovative Properties Company | Stretch release adhesive article with secondary release member |
| JP5852427B2 (ja) * | 2011-12-06 | 2016-02-03 | 日東電工株式会社 | 両面粘着シート |
| JP2013149603A (ja) * | 2011-12-20 | 2013-08-01 | Nitto Denko Corp | 電池用粘着テープ、及び該粘着テープを使用した電池 |
| JP7801219B2 (ja) * | 2020-06-23 | 2026-01-16 | Zacros株式会社 | 封止フィルム、電極リード線部材および電池 |
-
2022
- 2022-11-15 KR KR1020220152836A patent/KR20240071104A/ko active Pending
-
2023
- 2023-11-14 CN CN202380079522.2A patent/CN120239734A/zh active Pending
- 2023-11-14 WO PCT/KR2023/018233 patent/WO2024106900A1/ko not_active Ceased
- 2023-11-14 JP JP2025525768A patent/JP2025537720A/ja active Pending
- 2023-11-14 EP EP23891967.4A patent/EP4588987A4/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000303031A (ja) * | 1999-04-21 | 2000-10-31 | Yahiro Rino | 積層粘着テ−プ |
| KR20120044199A (ko) * | 2010-10-27 | 2012-05-07 | 도레이첨단소재 주식회사 | 전자부품용 접착 조성물 및 전자부품용 접착 테이프 |
| KR20160143058A (ko) * | 2015-06-04 | 2016-12-14 | 주식회사 테이팩스 | 열압착 마감 테이프, 그 제조 방법 및 이를 포함하는 리튬이차전지 |
| KR20180087598A (ko) * | 2017-01-25 | 2018-08-02 | 김성철 | 돌출 파지부를 갖은 이형 테이프를 포함하는 필름 |
| KR20190098046A (ko) * | 2018-02-13 | 2019-08-21 | 닛토덴코 가부시키가이샤 | 점착 시트 및 점착 시트 적층체 |
| KR20220152836A (ko) | 2021-05-10 | 2022-11-17 | 덕산네오룩스 주식회사 | 수지, 수지 조성물 및 이를 이용한 표시장치 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP4588987A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2025537720A (ja) | 2025-11-20 |
| CN120239734A (zh) | 2025-07-01 |
| KR20240071104A (ko) | 2024-05-22 |
| EP4588987A4 (en) | 2025-12-31 |
| EP4588987A1 (en) | 2025-07-23 |
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