# US 2017/0256756 A1 · Secondary battery, electronic device, and vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0256756 A1 - Document ID: US20170256756A1 - Status: Published application - Kind: A1 - Application number: 15/596,161 - Filed: 2017-05-16 - Published: 2017-09-07 - Earliest claimed: 2014-08-08 - Assignees: Semiconductor Energy Laboratory Co., Ltd. - Applicants: Semiconductor Energy Laboratory Co., Ltd. - Inventors: Hiroyuki MIYAKE - Web page: https://patentgrep.com/patent/US20170256756A1 ## CPC - H01M 50/557: Plate-shaped terminals - H01M 50/105: Pouches or flexible bags - H01M 50/119: Metals - H01M 50/121: Organic material - H01M 50/124: having a layered structure - H01M 50/133: Thickness - H01M 50/178: for pouch or flexible bag cells - H01M 50/55: on the same side of the cell - H01M 50/562: characterised by the material - 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 - 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 Provided is a secondary battery suitable for a portable information terminal or a wearable device, or an electronic device having a novel structure with a variety of forms and a secondary battery that fits the form of the electronic device. The secondary battery is sealed using a film having projections that can reduce stress on the film caused when external force is applied. The film has a pattern of projections formed by pressing (e.g., embossing). A top portion of each of the projections has a region thicker than a bottom portion of each of the projections. The thickness of the top portion of each of the projections is 1.5 or more times, preferably 2 or more times, as large as that of the bottom portion of each of the projections, and is a thickness such that each of the projections has a convex space. ## Claims ### Claim 1 (canceled) ### Claim 2 A secondary battery comprising: a film comprising flat portions and curved portions, wherein the flat portions and the curved portions are alternately provided each other, wherein a thickness of a top portion of each of the curved portions is thicker than a thickness of the flat portions. ### Claim 3 (depends on 2) The secondary battery according to claim 2, wherein the thickness of the top portion of each of the curved portions is 1.5 or more times as large as the thickness of the flat portions. ### Claim 4 (depends on 2) The secondary battery according to claim 2, wherein the film comprises a metal film and an insulating film, and wherein the metal film is in contact with the insulating film. ### Claim 5 (depends on 2) The secondary battery according to claim 2, wherein at least a positive electrode active material layer, a negative electrode active material layer, and an electrolyte solution are surrounded by the film. ### Claim 6 (depends on 2) An electronic device comprising: the secondary battery according to claim 2; and a display device, a microphone, a speaker, an operation button, a housing, or a sensor. ### Claim 7 (depends on 2) A vehicle comprising: the secondary battery according to claim 2; and a display device of a speedometer. ### Claim 8 A secondary battery comprising: a film comprising flat portions and curved portions, wherein the flat portions and the curved portions are alternately provided each other, wherein a thickness of a top portion of each of the curved portions is thicker than a thickness of each a portion adjacent the flat portions. ### Claim 9 (depends on 8) The secondary battery according to claim 8, wherein the thickness of the top portion of each of the curved portions is 1.5 or more times as large as the thickness of the flat portions. ### Claim 10 (depends on 8) The secondary battery according to claim 8, wherein the film comprises a metal film and an insulating film, and wherein the metal film is in contact with the insulating film. ### Claim 11 (depends on 8) The secondary battery according to claim 8, wherein at least a positive electrode active material layer, a negative electrode active material layer, and an electrolyte solution are surrounded by the film. ### Claim 12 (depends on 8) An electronic device comprising: the secondary battery according to claim 8; and a display device, a microphone, a speaker, an operation button, a housing, or a sensor. ### Claim 13 (depends on 8) A vehicle comprising: the secondary battery according to claim 8; and a display device of a speedometer. ### Claim 14 A secondary battery comprising: a film comprising projections and depressions, wherein the projections and the depressions are alternately provided each other, wherein flat portions are each provided between the projections and the depressions, wherein a thickness of a top portion of each of the projections and a thickness of a bottom portion of each of the depressions are thicker than a thickness of the flat portions. ### Claim 15 (depends on 14) The secondary battery according to claim 14, wherein the thickness of the top portion of each of the projections and the thickness of the bottom portion of each of the depressions are 1.5 or more times as large as the thickness of the flat portions. ### Claim 16 (depends on 14) The secondary battery according to claim 14, wherein the film comprises a metal film and an insulating film, and wherein the metal film is in contact with the insulating film. ### Claim 17 (depends on 14) The secondary battery according to claim 14, wherein at least a positive electrode active material layer, a negative electrode active material layer, and an electrolyte solution are surrounded by the film. ### Claim 18 (depends on 14) An electronic device comprising: the secondary battery according to claim 14; and a display device, a microphone, a speaker, an operation button, a housing, or a sensor. ### Claim 19 (depends on 14) A vehicle comprising: the secondary battery according to claim 14; and a display device of a speedometer.