# US 10,873,103 B2 · Electrode assembly and rechargeable battery including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,103 B2 - Document ID: US10873103B2 - Status: Granted - Kind: B2 - Application number: 16/276,743 - Filed: 2019-02-15 - Published: 2019-08-22 - Granted: 2020-12-22 - Earliest claimed: 2018-02-20 - Assignees: Samsung SDI Co., Ltd. - Applicants: Samsung SDI Co., Ltd. - Inventors: Youngsan Ko; Kijun Kim; Yuhyun Kim; Junsik Lee; Woonsuk Jang - Web page: https://patentgrep.com/patent/US10873103B2 ## CPC - H01M 10/0431: {Cells with wound or folded electrodes (H01M10/045 takes precedence)} - H01M 10/045: {Cells or batteries with folded plate-like electrodes} - H01M 4/0404: {by coating on electrode collectors} - H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof - H01M 4/139: Processes of manufacture - H01M 10/0436: {Small-sized flat cells or batteries for portable equipment} - 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 10/0587: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators - H01M 50/497: Ionic conductivity - H01M 50/534: characterised by the material of the leads or tabs - H01M 50/536: characterised by the method of fixing the leads to the electrodes, e.g. by welding - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - 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 ## Abstract An electrode assembly and rechargeable battery, the electrode assembly including a first electrode including a first sub-electrode in which an active material is on both surfaces of a base substrate, a second sub-electrode in which the active material is on one surface of the base substrate, and a first electrode uncoated region extending from the first sub-electrode; a second electrode including a third sub-electrode in which an active material is on both surfaces of a base substrate, a fourth sub-electrode in which the active material is on one surface of the base substrate, and a second electrode uncoated region extending from the third sub-electrode; and a separator between the electrodes, wherein the active material at the third sub-electrode includes a protruding portion protruding therefrom, and a distance from the end of the active material at sides based on the third sub-electrode to the protruding portion is 0 to 3 mm. ## Claims ### Claim 1 An electrode assembly that is spiral-wound about a winding axis, the electrode assembly comprising: a first electrode including: a first sub-electrode portion in which a first active material layer is respectively formed on both surfaces of a first base substrate, a second sub-electrode portion in which the first active material layer is formed on only one surface of the first base substrate, and a first electrode uncoated region extending from the first sub-electrode portion; a second electrode including: a third sub-electrode portion in which a second active material layer is respectively formed on both surfaces of a second base substrate, a fourth sub-electrode portion in which the second active material layer is formed on only one surface of the second base substrate, and a second electrode uncoated region extending from the third sub-electrode portion; and a separator between the first electrode and the second electrode, wherein: the second active material layer at the third sub-electrode portion includes a protruding portion protruding therefrom, and a lateral distance from the end of the first active material layer, disposed at either a top side or a bottom side of the third sub-electrode portion, to an inner boundary of the protruding portion is greater than 0 and less than 3 mm. ### Claim 2 (depends on 1) The electrode assembly as claimed in claim 1, wherein the third sub-electrode portion is at an end of the second electrode that is proximate to the winding axis. ### Claim 3 (depends on 1) The electrode assembly as claimed in claim 1, wherein: the protruding portion includes a first protruding portion and a second protruding portion respectively at opposite sides of the second base substrate, and a center line of the first protruding portion and a center line of the second protruding portion in a direction penetrating the second base substrate are on a same line or are laterally offset by a distance of less than 3 mm. ### Claim 4 (depends on 3) The electrode assembly as claimed in claim 3, wherein the center line of the first protruding portion and the center line of the second protruding portion are on the same line. ### Claim 5 (depends on 1) The electrode assembly as claimed in claim 1, wherein the second electrode is a negative electrode. ### Claim 6 (depends on 1) The electrode assembly as claimed in claim 1, wherein the protruding portion is at a flat portion of the electrode assembly. ### Claim 7 (depends on 1) A rechargeable battery, comprising: the electrode assembly as claimed in claim 1; a case receiving the electrode assembly; and an electrolyte solution in the case. ### Claim 8 (depends on 7) The rechargeable battery as claimed in claim 7, wherein the third sub-electrode portion is at an end of the second electrode that is proximate to the winding axis. ### Claim 9 (depends on 7) The rechargeable battery as claimed in claim 7, wherein: the protruding portion includes a first protruding portion and a second protruding portion respectively at opposite sides of the second base substrate, and a center line of the first protruding portion and a center line of the second protruding portion in a direction penetrating the second base substrate are on a same line or are laterally offset by a distance of less than 3 mm. ### Claim 10 (depends on 9) The rechargeable battery as claimed in claim 9, wherein the center line of the first protruding portion and the center line of the second protruding portion are on the same line. ### Claim 11 (depends on 7) The rechargeable battery as claimed in claim 7, wherein the second electrode is a negative electrode. ### Claim 12 (depends on 7) The rechargeable battery as claimed in claim 7, wherein the protruding portion is at a flat portion of the electrode assembly.