WO2022191509A1 - 부식 방지층의 제조 방법 및 원통형 이차전지 - Google Patents
부식 방지층의 제조 방법 및 원통형 이차전지 Download PDFInfo
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- WO2022191509A1 WO2022191509A1 PCT/KR2022/003053 KR2022003053W WO2022191509A1 WO 2022191509 A1 WO2022191509 A1 WO 2022191509A1 KR 2022003053 W KR2022003053 W KR 2022003053W WO 2022191509 A1 WO2022191509 A1 WO 2022191509A1
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- Prior art keywords
- corrosion
- battery
- layer
- resin
- secondary battery
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- 239000011347 resin Substances 0.000 claims abstract description 54
- 229920005989 resin Polymers 0.000 claims abstract description 54
- 229910052751 metal Inorganic materials 0.000 claims abstract description 43
- 239000002184 metal Substances 0.000 claims abstract description 43
- 238000007747 plating Methods 0.000 claims abstract description 43
- 238000003466 welding Methods 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 10
- 238000004804 winding Methods 0.000 claims abstract description 10
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 7
- 238000005260 corrosion Methods 0.000 claims description 102
- 230000007797 corrosion Effects 0.000 claims description 65
- 238000005536 corrosion prevention Methods 0.000 claims description 39
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 8
- 239000004593 Epoxy Substances 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 229920001296 polysiloxane Polymers 0.000 claims description 8
- 239000004925 Acrylic resin Substances 0.000 claims description 7
- 229920000178 Acrylic resin Polymers 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 145
- 230000008569 process Effects 0.000 description 13
- 230000000704 physical effect Effects 0.000 description 6
- 238000001994 activation Methods 0.000 description 5
- 239000012528 membrane Substances 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001678 irradiating effect Effects 0.000 description 3
- 239000006183 anode active material Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000006182 cathode active material Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000007641 inkjet printing Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000011344 liquid material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
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- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/571—Methods or arrangements for affording protection against corrosion; Selection of materials therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- 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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- H01M10/0431—Cells with wound or folded electrodes
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- H—ELECTRICITY
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
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- H01M50/10—Primary casings; Jackets or wrappings
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- H01M50/145—Primary casings; Jackets or wrappings for protecting against damage caused by external factors for protecting against corrosion
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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
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Definitions
- the present invention relates to a method for manufacturing a corrosion protection layer and a cylindrical secondary battery, and more particularly, to a method for manufacturing a corrosion protection layer capable of preventing corrosion of a battery can and a cylindrical secondary battery.
- a conventional cylindrical secondary battery has a structure in which a tab connecting a jelly-roll electrode assembly and an external terminal is welded to the foil of the jelly-roll electrode assembly.
- the cylindrical secondary battery having this structure has a problem in that the current path is limited and the resistance of the jelly-roll electrode assembly itself is high.
- the outside of the battery can of the cylindrical secondary battery is usually made of a metal plating layer, and the welding process of the electrode is laser welding.
- the metal plating layer may be damaged.
- the surface may be exposed to the air, and the battery can may be corroded.
- one object of the present invention is to provide a method for manufacturing a corrosion-preventing layer and a cylindrical secondary battery.
- the present invention provides a method and a secondary battery for manufacturing a corrosion protection layer according to the following aspects.
- a jelly-roll type electrode assembly having a structure in which a first electrode, a second electrode, and a separator interposed therebetween are wound in one direction with respect to a winding axis, accommodating the electrode assembly and using a metal
- a method for manufacturing a corrosion prevention layer of a cylindrical secondary battery comprising: a battery can including a plating layer; and a connection lead plate for bonding the battery can and an electrode assembly;
- the resin for the anti-corrosion layer includes one or more liquid substances,
- the one or more liquid substances are UV-curable and have a viscosity of 1cP or more and 5000cP or less.
- a method for manufacturing a corrosion protection layer is provided.
- a jelly-roll type electrode assembly having a structure in which a first electrode, a second electrode, and a separator interposed therebetween are wound in one direction with respect to a winding axis;
- a battery can accommodating the electrode assembly and including a metal plating layer
- connection lead plate for bonding the battery can and the electrode assembly
- Corrosion prevention layer prepared by the method of manufacturing the corrosion protection layer described above
- It provides a cylindrical secondary battery comprising a.
- a jelly-roll type electrode assembly having a structure in which a first electrode, a second electrode, and a separator interposed therebetween are wound in one direction with respect to a winding axis;
- a battery can accommodating the electrode assembly and including a metal plating layer
- connection lead plate for bonding the battery can and the electrode assembly
- Corrosion prevention layer in which a corrosion prevention layer is disposed at a portion where the outer surface of the battery can is damaged in a welding portion formed by melting the connection lead plate on the outer bottom surface of the battery can and the battery can
- It provides a cylindrical secondary battery comprising a.
- the method for manufacturing a corrosion protection layer and a cylindrical secondary battery according to an aspect of the present invention prevent corrosion of the battery can due to the damaged portion of the metal plating layer generated by welding on the battery can, thereby preventing product defects .
- the resin for the corrosion protection layer is easily cured by ultraviolet rays, so the process is simple.
- the metal plating layer existing on the outside of the battery can is prevented from being exposed to corrosion factors such as air and moisture, thereby preventing corrosion of the battery can and improving the safety of the battery. have.
- a method for manufacturing a corrosion-resistant layer and a cylindrical secondary battery according to an aspect of the present invention are deformed under an activation process (usually, left for about 24 hours under conditions of high temperature and high humidity (temperature of about 65° C. or more, humidity of about 90% or more)) It can provide advantages that are not available.
- FIGS. 1 and 2 are schematic diagrams illustrating an embodiment of the present invention.
- first, second, A, and B may be used to describe various elements, but the elements should not be limited by the terms.
- the above terms are used only for the purpose of distinguishing one component from another.
- a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.
- a term such as “and/or” includes a combination of a plurality of related items or a part of a plurality of related items.
- the term 'battery can' may have an opening, a cylindrical side and a bottom (or bottom), and may be usually made of a material of metal or alloy.
- the battery can is made of nickel-plated iron (a battery can containing a nickel-containing metal plating layer and iron).
- the 'battery can' is an object in which the electrode assembly of the secondary battery is accommodated.
- the battery can may have a cylindrical shape, and may have a diameter of 30 mm to 55 mm and a height of 60 mm to 120 mm at both ends.
- the circular diameter x height of the cylindrical battery can may be 40 mm x 60 mm, 40 mm x 80 mm, or 40 mm x 90 mm, 40 mm x 120 mm.
- the term 'secondary battery' refers to a battery that can be used repeatedly for a long time through recharging.
- the secondary battery may be classified into a nickel-cadmium secondary battery, a lithium ion secondary battery, and the like according to an electrode active material.
- the term 'cylindrical secondary battery' refers to a secondary battery having a cylindrical shape or a shape similar thereto.
- Cylindrical secondary batteries are widely used in large-capacity electronic and electric devices due to their high energy density per volume, and a plurality of them may be combined to form a battery pack.
- the cylindrical secondary battery may have a structure in which a rivet inserted through the bottom opposite to the opening is used as a cathode and the battery can itself is used as an anode.
- first electrode' may be a cathode and the term 'second electrode' may be an anode, or vice versa.
- the term 'cathode' includes a cathode current collector and a cathode active material applied to at least one surface of the cathode current collector.
- the cathode current collector may be aluminum or an alloy, but is not limited thereto.
- the cathode active material may be a lithium-containing transition metal oxide, but is not limited thereto.
- the term 'anode' includes an anode current collector and an anode active material applied to at least one surface of the anode current collector.
- the anode current collector may be copper or an alloy, but is not limited thereto.
- the anode active material may be a carbon material, but is not limited thereto.
- the term 'separation membrane' is a membrane interposed between the cathode and the anode, and serves to facilitate the movement of ions required to block the circuit while separating the cathode and the anode.
- An example of the separation membrane may be a microporous film composed of a polyolefin-based membrane, but is not limited thereto.
- liquid material' refers to a material that maintains a liquid state at room temperature (about 25 o C).
- 'ultraviolet curable' refers to a property that is cured by ultraviolet rays.
- a material when a material is 'ultraviolet curable', it refers to a material that is hardened and cured by ultraviolet rays.
- the term 'metal plating layer' refers to a layer applied to the outer surface of a battery can, and includes a metal plating material.
- a metal plating material for example, it may be a nickel plating layer.
- the term 'damaged site' refers to a region in which the outside of the battery can (including the metal plating layer, when applied as a metal plating layer) is damaged by a welding process.
- the welding process is typically performed outside the bottom of the cell can.
- the metal plating layer may be damaged by such a welding process. Accordingly, the electrolyte may leak by being easily exposed to a corrosive environment such as air and moisture.
- a jelly-roll type electrode assembly having a structure in which the first electrode, the second electrode, and a separator interposed therebetween are wound in one direction with respect to a winding axis, accommodating the electrode assembly and
- a method for manufacturing a corrosion prevention layer of a cylindrical secondary battery comprising: a battery can including a metal plating layer; and a connection lead plate for bonding the battery can and an electrode assembly;
- the resin for the anti-corrosion layer includes one or more liquid substances,
- the one or more liquid substances are UV-curable and have a viscosity of 1cP or more and 5000cP or less.
- a method for manufacturing a corrosion protection layer is provided.
- the resin for the corrosion protection layer may have a viscosity of 1cP or more, 200cP or more, 400cP or more, 600cP or more, 800cP or more, 1000cP or more, 1200cP or more, 1400cP or more, 1600cP or more, 1800cP or more, 2000cP or more, 2200cP or more, or 2400cP or more.
- the resin for the corrosion protection layer has a viscosity of 5000cP or less, 4800cP or less, 4600cP or less, 4400cP or less, 4200cP or less, 4000cP or less, 3800cP or less, 3600cP or less, 34OOcP or less, 3200cP or less, 3000cP or less, 2800cP or less, or 2600cP or less.
- 5000cP or less 4800cP or less, 4600cP or less, 4400cP or less, 4200cP or less, 4000cP or less, 3800cP or less, 3600cP or less, 34OOcP or less, 3200cP or less, 3000cP or less, 2800cP or less, or 2600cP or less.
- the resin 4 for the corrosion protection layer is cured by the ultraviolet light 7 to form the corrosion protection layer 6 .
- the above-described resin 4 for the anti-corrosion layer is sprayed and applied on the battery can 1, and referring to FIG. 2(C), ultraviolet rays 7 ) by irradiating the resin (4) for the corrosion prevention layer is a cured form, that is, the process of forming the corrosion prevention layer (6) is shown.
- the injection method is according to a conventional method.
- the resin for the anti-corrosion layer used in the above embodiment prevents corrosion by blocking corrosion factors such as air or moisture contact with the damaged part of the battery can.
- a resin for the anti-corrosion layer characterized by UV curability and low viscosity is used.
- the corrosion prevention layer formed of such a resin may have a uniform thickness, may prevent bubbles generated in the corrosion prevention layer, and may provide excellent physical properties in terms of heat resistance and heat transfer properties.
- the corrosion prevention layer formed of the resin for the corrosion prevention layer is not deformed by the activation process (typically, left for about 24 hours under conditions of high temperature and high humidity (temperature of about 65° C. or more, humidity of about 90% or more)).
- the coating method of the resin for the anti-corrosion layer may be performed by an appropriate method in the art.
- the injection may be performed through equipment such as the nozzle 5, and the discharge amount and discharge pressure applied to the nozzle may be selected within an appropriate range in the art.
- the ultraviolet (7) irradiation may be performed by equipment such as the UV lamp (8), and the wavelength of light applied to the light source of the UV lamp may be selected within an appropriate range in the art.
- the manufacturing method of the corrosion protection layer according to the embodiment uses one or more UV-curable liquid materials in the above-described resin for the corrosion protection layer, thereby providing the simplicity of the process.
- one or more liquid substances having a low viscosity of 1 cP or more and 5000 cP or less are used, the corrosion prevention layer formed of the resin for the corrosion prevention layer can be formed with a uniform thickness, and bubbles generated in the corrosion prevention layer can be prevented, and heat resistance , it is possible to provide excellent physical properties in terms of heat transfer properties and the like.
- the corrosion prevention layer formed by the above manufacturing method blocks corrosion factors such as air or moisture contact with the metal plating layer to prevent corrosion of the battery can.
- the corrosion prevention layer formed of the resin for the corrosion prevention layer according to the embodiment is formed by a subsequent activation process (usually, left for about 24 hours under conditions of high temperature and high humidity (temperature of about 65° C. or more, humidity of about 90% or more)) not deformed
- the resin for the anti-corrosion layer further comprises a light-emitting material
- (C) provides a method of manufacturing a corrosion protection layer further comprising the step of confirming the coating state of the resin for the corrosion protection layer on the battery can with ultraviolet light.
- the manufacturing method according to the embodiment confirms the coating state of the resin for the corrosion prevention layer on the damaged portion of the outer surface of the battery can with a light emitting material on the resin for the corrosion prevention layer, so that corrosion prevention is more efficiently achieved.
- an opening valve may be provided in the battery can to discharge the internal gas to the outside.
- the step of forming the anti-corrosion layer by avoiding the opening valve may be further included.
- the resin for the anti-corrosion layer provides a method of manufacturing the anti-corrosion layer comprising at least one selected from an epoxy-based, acrylate-based, silicone-based and urethane-based acrylic resin.
- the above-described epoxy-based, acrylate-based, silicone-based, and urethane-acrylic resins are sprayed with the resin 4 for the corrosion prevention layer including at least one selected from the group consisting of a battery can. (1) applied on top, and referring to FIG. 2(C), the process of forming the corrosion-preventing layer 6 in a cured form, that is, the corrosion-preventing layer 6 by irradiating ultraviolet rays 7, is shown. have.
- the method for manufacturing a corrosion protection layer according to the embodiment includes one or more selected from epoxy-based, acrylate-based, silicone-based and urethane-acrylic resins having UV curability and low viscosity properties in the above-described resin for the corrosion protection layer, so the corrosion protection layer
- the process is simple, the thickness of the corrosion protection layer can be uniformly formed, bubbles generated in the corrosion protection layer can be prevented, and excellent physical properties can be provided in terms of heat resistance and heat transfer properties.
- the curing time of step (B) provides a method for producing a corrosion protection layer that is 5 seconds or more and 30 seconds or less.
- the curing time may be 5 seconds or more, 10 seconds or more, or 15 seconds or more.
- the curing time may be 30 seconds or less, 25 seconds or less, or 20 seconds or less.
- the above-described resin 4 for the anti-corrosion layer is sprayed and applied on the battery can 1 .
- Figure 2 (C) by irradiating the ultraviolet rays 7 for 5 seconds or more and 30 seconds or less to cure the resin 4 for the corrosion prevention layer, the process of forming the corrosion prevention layer 6 is shown .
- the method for manufacturing the corrosion protection layer according to the embodiment provides a speedy process due to a short curing time of 5 seconds or more and 30 seconds or less, and a secondary battery satisfying the above range can secure safety.
- the battery can provides a method for manufacturing a corrosion protection layer comprising iron.
- the metal plating layer provides a method of manufacturing a corrosion protection layer comprising nickel.
- corrosion of the battery can may be primarily prevented by providing a metal plating layer (or including nickel).
- a metal plating layer or including nickel
- the surface of the battery can may be exposed while the metal plating layer is also melted.
- after welding of the battery can including the metal plating layer it is possible to prevent the surface of the battery can from being exposed by disposing a corrosion-preventing layer on a portion damaged by welding.
- the thickness of the anti-corrosion layer is more than 1 ⁇ m and less than 10 ⁇ m to provide a method for producing a corrosion protection layer.
- the thickness of the corrosion protection layer may be greater than 1 ⁇ m, greater than 2 ⁇ m, greater than 3 ⁇ m, greater than 4 ⁇ m, or greater than 5 ⁇ m.
- the thickness of the anti-corrosion layer may be less than 10 ⁇ m, less than 9 ⁇ m, less than 8 ⁇ m, less than 7 ⁇ m, or less than 6 ⁇ m.
- a corrosion protection layer prepared according to the manufacturing method of any one of the above embodiments.
- the corrosion protection layer 6 is a resin for the corrosion protection layer provided to the welding part 3 located on the metal plating layer 2 applied to the battery can 1 . is formed by curing by ultraviolet (7).
- the anti-corrosion layer according to the embodiment prevents corrosion of the battery can by blocking corrosion factors such as air or moisture contact with the metal plating layer. Since the resin for the anti-corrosion layer uses one or more liquid substances having UV curability and low viscosity, the corrosion-preventing layer formed using the same has a uniform thickness, almost no bubble generation, and has excellent physical properties in terms of heat resistance and heat transfer properties. can In addition, the anti-corrosion layer is not deformed by the activation process (typically, left for about 24 hours under conditions of high temperature and high humidity (temperature of about 65° C. or more, humidity of about 90% or more)).
- the anti-corrosion layer can also solve the problem that the coating layer formed by the conventional inkjet printing method is peeled off and corrosion occurs.
- a jelly-roll type electrode assembly having a structure in which a first electrode, a second electrode, and a separator interposed therebetween are wound in one direction with respect to a winding axis;
- a battery can accommodating the electrode assembly and including a metal plating layer
- connection lead plate for bonding the battery can and the electrode assembly
- Corrosion prevention layer prepared by any one of the above-described methods for manufacturing the corrosion protection layer
- It provides a cylindrical secondary battery comprising a.
- a jelly-roll type electrode assembly having a structure in which the first electrode, the second electrode, and a separator interposed therebetween are wound in one direction with respect to a winding axis;
- a battery can accommodating the electrode assembly and including a metal plating layer
- connection lead plate for bonding the battery can and the electrode assembly
- Corrosion prevention layer disposed at a portion where the outer surface of the battery can is damaged in a welding portion formed by melting the connection lead plate on the outer bottom surface of the battery can and the battery can
- It provides a cylindrical secondary battery comprising a.
- an electrode assembly (not shown) and a battery having a structure in which a first electrode, a separator, and a second electrode are sequentially stacked and wound A corrosion protection layer 6 is shown located on a weld 3 located on a metal plating layer 2 applied to the outer bottom surface 1 of the can.
- the secondary battery according to the embodiment includes a corrosion prevention layer that prevents corrosion of the battery can by blocking corrosion factors such as air or moisture contact with the metal plating layer, has a uniform thickness, hardly generates bubbles, heat resistance, It includes a corrosion prevention layer having excellent physical properties in terms of heat transfer properties and the like. In addition, it includes an anti-corrosion layer that is not deformed by an activation process (typically, left for about 24 hours under conditions of high temperature and high humidity (temperature of about 65° C. or more, humidity of about 90% or more)). Accordingly, the cylindrical secondary battery including the corrosion prevention layer has stability and/or safety. In addition, when the corrosion prevention layer is included, the defect rate of the cylindrical secondary battery can be minimized.
- an opening valve may be provided in the battery can to discharge the internal gas to the outside.
- the anti-corrosion layer can be formed by avoiding the opening valve.
- the anti-corrosion layer comprises a resin for the anti-corrosion layer
- the resin for the anti-corrosion layer provides a cylindrical secondary battery that is at least one selected from epoxy-based, acrylate-based, silicone-based and urethane-based acrylic resins.
- the above-described epoxy-based, acrylate-based, silicone-based, and urethane-acrylic resins are sprayed with the resin 4 for the corrosion prevention layer including at least one selected from the group consisting of a battery can.
- the application on (1) is shown.
- the cylindrical battery according to the embodiment includes one or more selected from epoxy-based, acrylate-based, silicone-based and urethane-acrylic resins having ultraviolet curability and low-viscosity properties as a resin for the corrosion-preventing layer.
- This is simple, the thickness of the corrosion prevention layer can be uniformly formed, it is possible to prevent bubbles generated in the corrosion prevention layer, and it is possible to provide excellent physical properties in terms of heat resistance and heat transfer properties.
- the resin for the anti-corrosion layer provides a cylindrical secondary battery that further comprises a light emitting material.
- corrosion prevention is more efficiently achieved by checking the coating state of the resin for the corrosion prevention layer in the area where the outer surface of the battery can is damaged as a light emitting material in the resin for the corrosion prevention layer.
- the battery can provides a cylindrical secondary battery including iron.
- the metal plating layer provides a cylindrical secondary battery including nickel.
- corrosion of a battery can containing iron may be primarily prevented by providing a metal plating layer (or containing nickel).
- a metal plating layer or containing nickel
- the surface of the battery can may be exposed while the metal plating layer is also melted.
- after welding of the battery can including the metal plating layer it is possible to prevent the surface of the battery can from being exposed by disposing a corrosion-preventing layer on a portion damaged by welding.
- the thickness of the anti-corrosion layer provides a cylindrical secondary battery that is greater than 1 ⁇ m and less than 10 ⁇ m.
- the thickness of the corrosion protection layer may be greater than 1 ⁇ m, greater than 2 ⁇ m, greater than 3 ⁇ m, greater than 4 ⁇ m, or greater than 5 ⁇ m.
- the thickness of the anti-corrosion layer may be less than 10 ⁇ m, less than 9 ⁇ m, less than 8 ⁇ m, less than 7 ⁇ m, or less than 6 ⁇ m.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
Claims (14)
- 제1 전극, 제2 전극 및 이들 사이에 개재된 분리막이 권취 축을 기준으로 일 방향으로 권취된 구조를 갖는 젤리-롤 타입의 전극 조립체, 상기 전극 조립체를 수용하고 금속 도금층을 포함하는 전지 캔 및 상기 전지 캔과 전극 조립체를 접합하는 접속 리드판을 포함하는 원통형 이차전지의 부식 방지층의 제조 방법에 있어서,(A) 상기 전지 캔의 외부 바닥면의 용접 시, 상기 접속 리드판과 상기 전지 캔이 용융되어 형성되는 용접부에서 상기 금속 도금층이 손상된 부위에 부식 방지층용 수지를 도포하는 단계; 및(B) 상기 부식 방지층용 수지를 자외선에 의해 경화하여 부식 방지층을 형성하는 단계를 포함하고,상기 부식 방지층용 수지는 1 이상의 액상물질을 포함하며,상기 1 이상의 액상물질은 자외선 경화성이고, 1cP 이상 5000cP 이하의 점도를 갖는 것인부식 방지층의 제조 방법.
- 청구항 1에 있어서,상기 부식 방지층용 수지는 발광물질을 더 포함하고,(C) 자외선으로 상기 전지 캔 상에 부식 방지층용 수지의 도포 상태를 확인하는 단계를 더 포함하는 부식 방지층의 제조 방법.
- 청구항 1에 있어서,상기 부식 방지층용 수지는 에폭시계, 아크릴레이트계, 실리콘계 및 우레탄아크릴계 수지 중에서 선택되는 하나 이상인 것인 부식 방지층의 제조 방법.
- 청구항 1에 있어서,상기 (B) 단계의 경화 시간은 5초 이상 30초 이하인 것인 부식 방지층의 제조 방법.
- 청구항 1에 있어서,상기 전지 캔은 철을 포함하는 것인 부식 방지층의 제조 방법.
- 청구항 1에 있어서,상기 금속 도금층은 니켈을 포함하는 것인 부식 방지층의 제조 방법.
- 청구항 1에 있어서,상기 부식 방지층의 두께는 1μm 초과 10μm 미만인 것인 부식 방지층의 제조 방법.
- 제1 전극, 제2 전극 및 이들 사이에 개재된 분리막이 권취 축을 기준으로 일 방향으로 권취된 구조를 갖는 젤리-롤 타입의 전극 조립체;상기 전극 조립체를 수용하고 금속 도금층을 포함하는 전지 캔;상기 전지 캔과 전극 조립체를 접합하는 접속 리드판; 및청구항 1 내지 7 중 어느 한 항에 따른 부식 방지층의 제조 방법으로 제조된 부식 방지층을 포함하는 원통형 이차전지.
- 제1 전극, 제2 전극 및 이들 사이에 개재된 분리막이 권취 축을 기준으로 일 방향으로 권취된 구조를 갖는 젤리-롤 타입의 전극 조립체;상기 전극 조립체를 수용하고 금속 도금층을 포함하는 전지 캔;상기 전지 캔과 전극 조립체를 접합하는 접속 리드판; 및상기 전지 캔의 외부 바닥면의 상기 접속 리드판과 상기 전지 캔이 용융되어 형성되는 용접부에서 상기 전지 캔의 외부 표면이 손상된 부위에 배치되는 부식 방지층을 포함하는 원통형 이차전지.
- 청구항 8에 있어서,상기 부식 방지층은 부식 방지층용 수지를 포함하고,상기 부식 방지층용 수지는 에폭시계, 아크릴레이트계, 실리콘계 및 우레탄아크릴계 수지 중에서 선택되는 하나 이상인 것인 원통형 이차전지.
- 청구항 10에 있어서,상기 부식 방지층용 수지는 발광물질을 더 포함하는 것인 원통형 이차전지.
- 청구항 8에 있어서,상기 전지 캔은 철을 포함하는 것인 원통형 이차전지.
- 청구항 8에 있어서,상기 금속 도금층은 니켈을 포함하는 것인 원통형 이차전지.
- 청구항 8에 있어서,상기 부식 방지층의 두께는 1μm 초과 10μm 미만인 것인 원통형 이차전지.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP22767405.8A EP4307464A1 (en) | 2021-03-08 | 2022-03-03 | Method for manufacturing corrosion-preventing layer, and cylindrical secondary battery |
US18/267,027 US20240313371A1 (en) | 2021-03-08 | 2022-03-03 | Method for manufacturing corrosion-preventing layer, and cylindrical secondary battery |
JP2023533603A JP2023552982A (ja) | 2021-03-08 | 2022-03-03 | 腐食防止層の製造方法および円筒型二次電池 |
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KR20210030319 | 2021-03-08 | ||
KR10-2021-0030319 | 2021-03-08 |
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WO2022191509A1 true WO2022191509A1 (ko) | 2022-09-15 |
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US (1) | US20240313371A1 (ko) |
EP (1) | EP4307464A1 (ko) |
JP (1) | JP2023552982A (ko) |
KR (1) | KR20220126221A (ko) |
CN (2) | CN217691371U (ko) |
WO (1) | WO2022191509A1 (ko) |
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KR20210030319A (ko) | 2018-10-26 | 2021-03-17 | 삼성전자주식회사 | 스위칭 레귤레이터를 이용하여 복수의 증폭기들에 선택적으로 전압을 공급하는 방법 및 장치 |
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2022
- 2022-03-02 CN CN202220453133.4U patent/CN217691371U/zh active Active
- 2022-03-02 CN CN202210203120.6A patent/CN115051086A/zh active Pending
- 2022-03-03 EP EP22767405.8A patent/EP4307464A1/en active Pending
- 2022-03-03 US US18/267,027 patent/US20240313371A1/en active Pending
- 2022-03-03 KR KR1020220027745A patent/KR20220126221A/ko unknown
- 2022-03-03 JP JP2023533603A patent/JP2023552982A/ja active Pending
- 2022-03-03 WO PCT/KR2022/003053 patent/WO2022191509A1/ko active Application Filing
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JP3124021B2 (ja) * | 1989-07-13 | 2001-01-15 | アクゾ ナームローゼ フェンノートシャップ | 耐酸腐食性コーティング |
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JP2015170395A (ja) * | 2014-03-05 | 2015-09-28 | 日立オートモティブシステムズ株式会社 | 円筒形二次電池 |
KR20210030319A (ko) | 2018-10-26 | 2021-03-17 | 삼성전자주식회사 | 스위칭 레귤레이터를 이용하여 복수의 증폭기들에 선택적으로 전압을 공급하는 방법 및 장치 |
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EP4307464A1 (en) | 2024-01-17 |
JP2023552982A (ja) | 2023-12-20 |
CN217691371U (zh) | 2022-10-28 |
KR20220126221A (ko) | 2022-09-15 |
US20240313371A1 (en) | 2024-09-19 |
CN115051086A (zh) | 2022-09-13 |
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