# US 9,040,189 B2 · Cable-type secondary battery and preparation thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,040,189 B2 - Document ID: US9040189B2 - Status: Granted - Kind: B2 - Application number: 14/479,856 - Filed: 2014-09-08 - Published: 2014-12-25 - Granted: 2015-05-26 - Earliest claimed: 2013-05-07 - Assignees: LG Chem, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Yo-Han Kwon; Byung-Hun Oh; Hye-Ran Jung; Je-Young Kim - Web page: https://patentgrep.com/patent/US9040189B2 ## CPC - H01M 10/0587: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators - H01M 4/02: Electrodes composed of, or comprising, active material - H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof - H01M 4/622: {being polymers} - H01M 4/623: {fluorinated polymers} - H01M 4/624: {Electric conductive fillers} - H01M 4/625: {Carbon or graphite} - H01M 4/64: Carriers or collectors - H01M 4/66: Selection of materials - H01M 4/667: {in the form of layers, e.g. coatings} - H01M 4/70: characterised by shape or form - H01M 4/74: Meshes or woven material; Expanded metal - H01M 10/0422: {Cells or battery with cylindrical casing} - H01M 10/0431: {Cells with wound or folded electrodes (H01M10/045 takes precedence)} - H01M 10/052: Li-accumulators - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 10/0565: Polymeric materials, e.g. gel-type or solid-type - H01M 10/0567: characterised by the additives - H01M 10/0568: characterised by the solutes - H01M 10/0569: characterised by the solvents - H01M 10/058: Construction or manufacture - H01M 50/107: having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) - H01M 50/414: Synthetic resins, e.g. thermoplastics or thermosetting resins - H01M 50/454: comprising a non-fibrous layer and a fibrous layer superimposed on one another - H01M 4/485: of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) - H01M 10/125: {Cells or batteries with wound or folded electrodes} - H01M 10/286: {Cells or batteries with wound or folded electrodes} - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop - H01M 2300/0037: Mixture of solvents - H01M 2300/0082: Organic polymers - H01M 2300/0085: Immobilising or gelification of electrolyte - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y10T 29/49115: including coating or impregnating - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The present disclosure provides a cable-type secondary battery, comprising: an inner electrode; and a sheet-form laminate of separation layer-outer electrode, spirally wound to surround the outer surface of the inner electrode, the laminate being formed by carrying out compression for the integration of a separation layer for preventing a short circuit, and an outer electrode. According to the present disclosure, the electrodes and the separation layer are compressed and integrated to minimize ununiform spaces between the separation layer and the outer electrode and reduce the thickness of a battery to be prepared, thereby decreasing resistance and improving ionic conductivity within the battery. Also, the separation layer coming into contact with the electrodes absorbs an electrolyte solution to induce the uniform supply of the electrolyte solution into the outer electrode active material layer, thereby enhancing the stability and performances of the cable-type secondary battery. ## Claims ### Claim 1 A cable-type secondary battery, comprising: an inner electrode; and a sheet-form laminate of separation layer-outer electrode, helically wound to surround an outer surface of the inner electrode, the laminate being formed by carrying out compression for the integration of a separation layer for preventing a short circuit and an outer electrode, wherein the separation layer is an electrolyte layer or a separator. ### Claim 2 (depends on 1) The cable-type secondary battery according to claim 1, wherein the electrolyte layer comprises an electrolyte selected from a gel polymer electrolyte using PEO, PVdF, PMMA, PVdF-HFP, PAN, or PVAc; and a solid electrolyte using PEO, polypropylene oxide (PPO), polyether imine (PEI), polyethylene sulphide (PES), or polyvinyl acetate (PVAc). ### Claim 3 (depends on 1) The cable-type secondary battery according to claim 1, wherein the electrolyte layer further comprises a lithium salt. ### Claim 4 (depends on 3) The cable-type secondary battery according to claim 3, wherein the lithium salt is selected from the group consisting of LiCl, LiBr, LiI, LiClO4, LiBF4, LiB10Cl10, LiPF6, LiCF3SO3, LiCF3CO2, LiAsF6, LiSbF6, LiAlCl4, CH3SO3Li, CF3SO3Li, (CF3SO2)2NLi, lithium chloroborate, lower aliphatic lithium carbonate, lithium tetraphenylborate, and a mixture thereof. ### Claim 5 (depends on 1) The cable-type secondary battery according to claim 1, wherein the separator is a porous polymer substrate made of a polyolefin-based polymer selected from the group consisting of ethylene homopolymers, propylene homopolymers, ethylene-butene copolymers, ethylene-hexene copolymers, and ethylene-methacrylate copolymers; a porous polymer substrate made of a polymer selected from the group consisting of polyesters, polyacetals, polyamides, polycarbonates, polyimides, polyether ether ketones, polyether sulfones, polyphenylene oxides, polyphenylene sulfides and polyethylene naphthalates; a porous substrate made of a mixture of inorganic particles and a binder polymer; or a separator having a porous coating layer formed on at least one surface of the porous polymer substrate and comprising inorganic particles and a binder polymer. ### Claim 6 (depends on 5) The cable-type secondary battery according to claim 5, wherein the porous polymer substrate is a porous polymer film substrate or a porous non-woven fabric substrate. ### Claim 7 A cable-type secondary battery, comprising: an inner electrode; a sheet-form laminate of separation layer-outer electrode, helically wound to surround an outer surface of the inner electrode, the laminate being formed by carrying out compression for the integration of a separation layer for preventing a short circuit and an outer electrode; and a protection coating surrounding an outer surface of the sheet-form laminate of separation layer-outer electrode. ### Claim 8 (depends on 7) The cable-type secondary battery according to claim 7, wherein the protection coating is made of a polymer resin. ### Claim 9 (depends on 8) The cable-type secondary battery according to claim 8, wherein the polymer resin comprises any one selected from the group consisting of PET, PVC, HDPE, an epoxy resin and a mixture thereof. ### Claim 10 (depends on 8) The cable-type secondary battery according to claim 8, wherein the protection coating further comprises a moisture-blocking layer. ### Claim 11 (depends on 10) The cable-type secondary battery according to claim 10, wherein the moisture-blocking layer is made of aluminum or a liquid-crystalline polymer. ### Claim 12 A method of preparing a cable-type secondary battery, comprising (S1) winding a wire-form inner current collector together with an inner electrode active material layer formed on a surface of the inner current collector to obtain a hollow inner electrode whose central part is empty; (S2) compressing a sheet of a separation layer for preventing a short circuit with a sheet of an outer electrode having an outer current collector and an outer electrode active material layer formed on one surface of the outer current collector for the integration thereof to obtain a laminate of separation layer-outer electrode; (S3) helically winding the laminate of separation layer-outer electrode on an outer surface of the inner electrode to obtain an electrode assembly; (S4) forming a protection coating on an outer surface of the electrode assembly; and (S5) introducing an electrolyte solution in the empty central part of the inner electrode to form a core for supplying lithium ions. ### Claim 13 A method of preparing a cable-type secondary battery, comprising (S1) forming a core for supplying lithium ions; (S2) winding a wire-form inner current collector together with an inner electrode active material layer formed on a surface of the inner current collector, on an outer surface of the core for supplying lithium ions, to obtain an inner electrode; (S3) compressing a sheet of a separation layer for preventing a short circuit with a sheet of an outer electrode having an outer current collector and an outer electrode active material layer formed on one surface of the outer current collector for the integration thereof to obtain a laminate of separation layer-outer electrode; (S4) helically winding the laminate of separation layer-outer electrode on an outer surface of the inner electrode to obtain an electrode assembly; and (S5) forming a protection coating on an outer surface of the electrode assembly.