# US 2010/0167113 A1 · Rechargeable battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0167113 A1 - Document ID: US20100167113A1 - Status: Published application - Kind: A1 - Application number: 12/643,964 - Filed: 2009-12-21 - Published: 2010-07-01 - Earliest claimed: 2008-12-30 - Assignees: Samsung SDI Co., Ltd.; Robert Bosch GmbH - Inventors: Dong-Hyun Lee; Sang-Eun Cheon; Tatsuya Hashimoto; Seok-Yoon Yoo; Chi-Young Lee - Web page: https://patentgrep.com/patent/US20100167113A1 ## CPC - H01M 10/0431: {Cells with wound or folded electrodes (H01M10/045 takes precedence)} - H01M 10/0413: {Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes} - H01M 10/0463: {Cells or batteries with horizontal or inclined electrodes} - H01M 10/0587: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators - H01M 10/125: {Cells or batteries with wound or folded electrodes} - H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence) - H01M 50/107: having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) - 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 A rechargeable battery includes an electrode assembly comprising a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode wound together and a case housing the electrode assembly, wherein the electrode assembly has an inner surface and an outer surface having a concave portion. ## Claims ### Claim 1 A rechargeable battery, comprising: an electrode assembly comprising a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode wound together; and a case housing the electrode assembly, wherein the electrode assembly has an inner surface and an outer surface, the outer surface having a concave portion. ### Claim 2 (depends on 1) The rechargeable battery of claim 1, wherein the outer surface has a convex portion facing a first direction, and wherein the concave portion faces a second direction substantially opposite to the first direction. ### Claim 3 (depends on 1) The rechargeable battery of claim 1, wherein the electrode assembly is folded. ### Claim 4 (depends on 1) The rechargeable battery of claim 1, wherein the positive electrode includes a first coated portion coated with an active material and a first uncoated portion absent the active material and extending from the first coated portion in a third direction; and wherein the negative electrode includes a second coated portion coated with an active material and a second uncoated portion absent the active material and extending from the second coated portion in a fourth direction substantially opposite to the third direction. ### Claim 5 (depends on 1) The rechargeable battery of claim 1, wherein the electrode assembly has a first end extending into a space defined by the concave portion. ### Claim 6 (depends on 1) The rechargeable battery of claim 1, wherein the electrode assembly has a first end and a second end facing the first end. ### Claim 7 (depends on 1) The rechargeable battery of claim 1, further comprising a support rod contacting the concave portion. ### Claim 8 (depends on 1) The rechargeable battery of claim 1, wherein the case has a cylindrical shape and wherein the inner surface is folded. ### Claim 9 (depends on 1) The rechargeable battery of claim 1, wherein the outer surface has a first portion and a second portion contacting each other at an interface. ### Claim 10 (depends on 1) The rechargeable battery of claim 1, wherein the electrode assembly has a C shape. ### Claim 11 (depends on 1) The rechargeable battery of claim 1, wherein the outer surface has a spiral shape. ### Claim 12 (depends on 1) The rechargeable battery of claim 1, wherein a first expansion space is defined by the concave surface of the outer surface and wherein a second expansion space is defined by the inner surface. ### Claim 13 (depends on 1) The rechargeable battery of claim 1, wherein the electrode assembly has an outer circumferential length greater than an outer circumferential length of the case. ### Claim 14 (depends on 1) The rechargeable battery of claim 1, wherein the outer surface is folded such that a first section of the outer surface contacts a second section of the outer surface. ### Claim 15 (depends on 14) The rechargeable battery of claim 14, wherein the case has a quadrangular shape. ### Claim 16 (depends on 1) The rechargeable battery of claim 1, wherein the inner surface is in tension. ### Claim 17 A rechargeable battery, comprising: an electrode assembly comprising a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode wound together; and a case housing the electrode assembly, wherein the electrode assembly has an inner surface and an outer surface, the outer surface having a first portion and a second portion, wherein an expansion space is defined between the first portion and the second portion. ### Claim 18 (depends on 17) The rechargeable battery of claim 17, wherein the electrode assembly has a first end adjacent the expansion space.