# US 10,122,010 B2 · Secondary battery and electronic device 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 10,122,010 B2 - Document ID: US10122010B2 - Status: Granted - Kind: B2 - Application number: 14/751,443 - Filed: 2015-06-26 - Published: 2016-01-14 - Granted: 2018-11-06 - Earliest claimed: 2014-07-11 - Assignees: Semiconductor Energy Laboratory Co., Ltd. - Applicants: Semiconductor Energy Laboratory Co., LTD. - Inventors: Ryota Tajima; Yuugo Goto; Yumiko Yoneda; Junya Goto; Takuya Miwa; Masaaki Hiroki - Web page: https://patentgrep.com/patent/US10122010B2 ## CPC - 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 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 2004/021: {Physical characteristics, e.g. porosity, surface area} - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop - Y02E 60/10: Energy storage using 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 ## Abstract An electronic device having a novel structure, specifically, an electronic device having a novel structure that can be changed into various appearances is provided. Specifically, after an active material layer is formed on one or both surfaces of a current collector, the active material layer in a bent region is partly removed. The removed region of the active material layer can be in a linear shape, a dot shape, or a matrix shape, for example. After the active material layer is formed on one or both surfaces of the current collector, laser processing for removing part of the active material layer in an irradiation region is performed using laser light or the like. On the region where the surface of the current collector is exposed, the active material layer is not provided, and this region is a region that does not function as a battery. Owing to this region, a secondary battery with a wide movable region can be achieved. ## Claims ### Claim 1 A secondary battery comprising: a current collector; a plurality of active material layers in contact with the current collector; and an electrolyte solution in contact with the current collector and the plurality of active material layers, wherein the current collector comprises a meandering portion, wherein the meandering portion includes two or more portions having a small width, and at least one of the two or more portions overlaps with a boundary between adjacent active material layers of the plurality of active material layers, wherein a first active material layer of the plurality of active material layers is adjacent to a second active material layer of the plurality of active material layers, wherein a third active material layer of the plurality of active material layers is adjacent to the second active material layer of the plurality of active material layers, wherein the first to third active material layers each are in contact with the same surface of the current collector, and wherein a distance between the first active material layer and the second active material layer is different from a distance between the second active material layer and the third active material layer. ### Claim 2 (depends on 1) The secondary battery according to claim 1, wherein the active material layer comprises a positive electrode active material or a negative electrode active material. ### Claim 3 (depends on 1) The secondary battery according to claim 1, wherein the active material layer comprises lithium. ### Claim 4 (depends on 1) The secondary battery according to claim 1, further comprising an exterior body, wherein the exterior body is a film, and wherein the current collector is surrounded by the exterior body. ### Claim 5 (depends on 1) The secondary battery according to claim 1, wherein the current collector is a metal foil containing any one of gold, platinum, iron, nickel, copper, aluminum, titanium, tantalum, and manganese. ### Claim 6 (depends on 1) The secondary battery according to claim 1, wherein the meandering portion is a bendable portion of the secondary battery. ### Claim 7 (depends on 1) The secondary battery according to claim 1, wherein the plurality of active material layers are arranged in either a long-side direction or a short-side direction of the current collector with a distance provided therebetween. ### Claim 8 (depends on 1) The secondary battery according to claim 1, wherein a fourth active material layer of the plurality of active material layers is overlapped with the first and second active material layers through the current collector. ### Claim 9 (depends on 1) The secondary battery according to claim 1, wherein a fourth active material layer of the plurality of active material layers is overlapped with the first active material layer through the current collector, wherein a fifth active material layer of the plurality of active material layers is overlapped with the second active material layer through the current collector, and wherein a distance between the fourth active material layer and the fifth active material layer is the same as the distance between the first active material layer and the second active material layer. ### Claim 10 A secondary battery comprising: a current collector; a plurality of active material layers in contact with one surface of the current collector; and an electrolyte solution in contact with the current collector and the plurality of active material layers, wherein the current collector comprises a meandering portion, wherein the meandering portion includes two or more portions having a small width, and at least one of the two or more portions overlaps with a boundary between adjacent active material layers of the plurality of active material layers, wherein a first active material layer of the plurality of active material layers is adjacent to a second active material layer of the plurality of active material layers, wherein a third active material layer of the plurality of active material layers is adjacent to the second active material layer of the plurality of active material layers, and wherein a distance between the first active material layer and the second active material layer is different from a distance between the second active material layer and the third active material layer. ### Claim 11 (depends on 10) The secondary battery according to claim 10, wherein the active material layer comprises a positive electrode active material or a negative electrode active material. ### Claim 12 (depends on 10) The secondary battery according to claim 10, wherein the active material layer comprises lithium. ### Claim 13 (depends on 10) The secondary battery according to claim 10, further comprising an exterior body, wherein the exterior body is a film, and wherein the current collector is surrounded by the exterior body. ### Claim 14 (depends on 10) The secondary battery according to claim 10, wherein the current collector is a metal foil containing any one of gold, platinum, iron, nickel, copper, aluminum, titanium, tantalum, and manganese. ### Claim 15 (depends on 10) The secondary battery according to claim 10, wherein the meandering portion is a bendable portion of the secondary battery. ### Claim 16 (depends on 10) The secondary battery according to claim 10, wherein the plurality of active material layers are arranged in either a long-side direction or a short-side direction of the current collector with a distance provided therebetween.