# US 2018/0323418 A1 · Cable-type secondary battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0323418 A1 - Document ID: US20180323418A1 - Status: Published application - Kind: A1 - Application number: 15/772,300 - Filed: 2017-02-06 - Published: 2018-11-08 - Earliest claimed: 2016-02-05 - Assignees: LG Chem, Ltd. - Applicants: LG Chem, Ltd. - Inventors: In-Sung Uhm; Je-Young Kim; Suk-In Noh; Young-Ji Yuk; Dong-Chan Lee - Web page: https://patentgrep.com/patent/US20180323418A1 ## CPC - H01M 4/75: Wires, rods or strips - H01M 4/139: Processes of manufacture - 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 50/126: comprising three or more layers - H01M 50/141: for protecting against humidity - H01M 50/46: Separators, membranes or diaphragms characterised by their combination with electrodes - H01M 50/469: tubular or cylindrical - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - 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 - 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 ## Abstract The present disclosure relates to a cable type secondary battery which includes: a cable type electrode assembly including an inner electrode, a separator layer formed to surround the outer surface of the inner electrode and preventing a short-circuit between electrodes, and an outer electrode formed to surround the separator layer; a taping layer formed by spirally winding a sheet type tape so that it surrounds the outer surface of the cable type electrode assembly; and a packaging formed to surround the outer surface of the taping layer. According to the present disclosure, it is possible to prevent separation of the separator layer or the outer electrode, and thus to reinforce the bending characteristics of the cable type secondary battery. ## Claims ### Claim 1 A cable type secondary battery which comprises: a cable type electrode assembly including an inner electrode, a separator layer formed to surround the outer surface of the inner electrode and preventing a short-circuit between electrodes, and an outer electrode formed to surround the separator layer; a taping layer formed by spirally winding a sheet type tape so that it surrounds the outer surface of the cable type electrode assembly; and a packaging formed to surround the outer surface of the taping layer. ### Claim 2 (depends on 1) The cable type secondary battery according to claim 1, wherein the sheet type tape has a strip structure extended in one direction. ### Claim 3 (depends on 1) The cable type secondary battery according to claim 1, wherein the sheet type tape is wound spirally with an overlap. ### Claim 4 (depends on 1) The cable type secondary battery according to claim 1, wherein the sheet type tape comprises any one selected from the group consisting of polyethylene terephthalate, polypropylene, thermoplastic polyurethane and Teflon, or a combination of two or more of them. ### Claim 5 (depends on 1) The cable type secondary battery according to claim 1, wherein the sheet type tape comprises a bonding layer so that it may retain its adhesion after the impregnation with an electrolyte. ### Claim 6 (depends on 5) The cable type secondary battery according to claim 5, wherein the bonding layer comprises any one selected from the group consisting of polyacrylate, polyimide, polyamide, polyacrylonitrile, cyanoacrylate and epoxy, or a combination of two or more of them. ### Claim 7 (depends on 1) The cable type secondary battery according to claim 1, wherein the outer electrode is a sheet type outer electrode formed by spiral winding so that it surrounds the outer surface of the separator layer. ### Claim 8 (depends on 7) The cable type secondary battery according to claim 7, wherein the sheet type outer electrode has a strip structure extended in one direction. ### Claim 9 (depends on 7) The cable type secondary battery according to claim 7, wherein the sheet type tape is formed on the interface between the sheet type outer electrodes formed by spiral winding. ### Claim 10 (depends on 1) The cable type secondary battery according to claim 1, wherein the packaging is a sheet type packaging formed by spiral winding so that it surrounds the outer surface of the taping layer. ### Claim 11 (depends on 10) The cable type secondary battery according to claim 10, wherein the sheet type packaging has a strip structure extended in one direction. ### Claim 12 (depends on 10) The cable type secondary battery according to claim 10, wherein the sheet type packaging is formed by spiral winding with an overlap. ### Claim 13 (depends on 10) The cable type secondary battery according to claim 10, wherein the sheet type packaging is provided with a water barrier film, a first sealant polymer layer formed on one surface of the water barrier film, and a second sealant polymer layer formed on the other surface of the water barrier film. ### Claim 14 (depends on 13) The cable type secondary battery according to claim 13, wherein the first sealant polymer layer and the second sealant polymer layer comprise the same material. ### Claim 15 (depends on 13) The cable type secondary battery according to claim 13, wherein the sheet type packaging further comprises a mechanical support layer formed between the water barrier film and the first sealant polymer layer, or between the water barrier film and the second sealant polymer layer. ### Claim 16 (depends on 10) The cable type secondary battery according to claim 10, which further comprises a heat shrinking tube surrounding the whole outer surface of the sheet type packaging formed by spiral winding. ### Claim 17 (depends on 1) The cable type secondary battery according to claim 1, wherein the inner electrode is provided with a lithium ion-supplying core portion containing an electrolyte, an open structured inner current collector formed to surround the outer surface of the lithium ion-supplying core portion, and an inner electrode active material layer formed on the surface of the inner current collector. ### Claim 18 (depends on 17) The cable type secondary battery according to claim 17, wherein the open structured inner current collector is a wound wire type current collector, wound sheet type current collector or a mesh type current collector.