# US 2019/0296322 A1 · Method and apparatus for manufacturing an electrode sheet > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0296322 A1 - Document ID: US20190296322A1 - Status: Published application - Kind: A1 - Application number: 16/247,751 - Filed: 2019-01-15 - Published: 2019-09-26 - Earliest claimed: 2018-03-20 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Tomofumi Hirukawa - Web page: https://patentgrep.com/patent/US20190296322A1 ## CPC - H01M 4/0435: {Rolling or calendering} - H01M 4/139: Processes of manufacture - H01M 2004/021: {Physical characteristics, e.g. porosity, surface area} - 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 A method for manufacturing an electrode sheet including an electrode layer on both surfaces of a current collecting foil includes: feeding out an original electrode sheet including an unfinished electrode layer on each surface of the foil from a feeding part; causing a press roll pair to contact with the original sheet fed out to form the unfinished layers into electrode layers; receiving the sheet having passed through the roll pair by a sheet receiving part; and rotating rolls of the roll pair in a feeding direction. The feeding part, roll pair, and receiving part are placed such that the original sheet and the electrode sheet are to be wound on one of the rolls. The rolls are rotated such that a moving speed of cylindrical surface of one roll placed in a position where the sheets are wound thereon is higher than that of the other roll. ## Claims ### Claim 1 A method for manufacturing an electrode sheet, the electrode sheet including an electrode layer on both surfaces of a current collecting foil, the method comprising the steps of: feeding out an original electrode sheet from an original sheet feeding part, the original electrode sheet including an unfinished electrode layer on each of the surfaces of the current collecting foil; causing a press roll pair including a pair of rolls to contact with the original electrode sheet from both sides, the original electrode sheet being fed out from the original sheet feeding part, to form the unfinished electrode layers into electrode layers; receiving the electrode sheet having passed through the press roll pair by an electrode sheet receiving part; and causing a driving part to rotate each of the rolls of the press roll pair in a feeding direction of the original electrode sheet and the electrode sheet, wherein the original sheet feeding part, the press roll pair, and the electrode sheet receiving part are placed in a positional relationship such that the original electrode sheet and the electrode sheet are to be wound on one of the rolls of the press roll pair, and the rolls of the press roll pair are driven by the driving part to rotate such that a moving speed of cylindrical surface of an inner roll corresponding to one of the rolls, the inner roll being placed in a position where the original electrode sheet and the electrode sheet are wound on the inner roll, is higher than a moving speed of cylindrical surface of an outer roll corresponding to the other roll. ### Claim 2 (depends on 1) The method for manufacturing an electrode sheet according to claim 1, wherein the moving speed of the cylindrical surface of the outer roll is set within a range of 1.03 to 1.05 times higher than the moving speed of the cylindrical surface of the inner roll. ### Claim 3 (depends on 1) The method for manufacturing an electrode sheet according to claim 1, wherein the original electrode sheet and the electrode sheet are to be wound on the inner roll at a winding angle set in a range of 30° to 120°. ### Claim 4 (depends on 2) The method for manufacturing an electrode sheet according to claim 2, wherein the original electrode sheet and the electrode sheet are to be wound on the inner roll at a winding angle set in a range of 30° to 120°. ### Claim 5 (depends on 1) The method for manufacturing an electrode sheet according to claim 1, wherein an original electrode sheet in which the unfinished electrode layers corresponding to both surfaces are different in density from each other is fed out from the original sheet feeding part such that the unfinished electrode layer with a higher density than the other unfinished electrode layer faces the inner roll in the press roll pair. ### Claim 6 (depends on 2) The method for manufacturing an electrode sheet according to claim 2, wherein an original electrode sheet in which the unfinished electrode layers corresponding to both surfaces are different in density from each other is fed out from the original sheet feeding part such that the unfinished electrode layer with a higher density than the other unfinished electrode layer faces the inner roll in the press roll pair. ### Claim 7 (depends on 3) The method for manufacturing an electrode sheet according to claim 3, wherein an original electrode sheet in which the unfinished electrode layers corresponding to both surfaces are different in density from each other is fed out from the original sheet feeding part such that the unfinished electrode layer with a higher density than the other unfinished electrode layer faces the inner roll in the press roll pair. ### Claim 8 (depends on 4) The method for manufacturing an electrode sheet according to claim 4, wherein an original electrode sheet in which the unfinished electrode layers corresponding to both surfaces are different in density from each other is fed out from the original sheet feeding part such that the unfinished electrode layer with a higher density than the other unfinished electrode layer faces the inner roll in the press roll pair. ### Claim 9 An apparatus for manufacturing an electrode sheet including an electrode layer on both surfaces of a current collecting foil, the apparatus comprising: an original sheet feeding part configured to feed out an original electrode sheet including an unfinished electrode layer on each of the surfaces of the current collecting foil; a press roll pair including a pair of rolls and configured to contact with the original electrode sheet from both sides, the original electrode sheet being fed out from the original sheet feeding part, to form the unfinished electrode layers into electrode layers; an electrode sheet receiving part configured to receive the electrode sheet having passed through the press roll pair; and a driving part configured to rotate each of the rolls of the press roll pair in a feeding direction of the original electrode sheet and the electrode sheet, wherein the original sheet feeding part, the press roll pair, and the electrode sheet receiving part are placed in a positional relationship such that the original electrode sheet and the electrode sheet are to be wound on one of the rolls of the press roll pair, and the rolls of the press roll pair are driven by the driving part to rotate such that a moving speed of cylindrical surface of an inner roll corresponding to one of the rolls, the inner roll being placed in a position where the original electrode sheet and the electrode sheet are wound on the inner roll, is higher than a moving speed of cylindrical surface of an outer roll corresponding to the other roll. ### Claim 10 (depends on 9) The apparatus for manufacturing an electrode sheet according to claim 9, wherein the driving part is configured to set the moving speed of the cylindrical surface of the outer roll within a range of 1.03 to 1.05 times higher than the moving speed of the cylindrical surface of the inner roll. ### Claim 11 (depends on 9) The apparatus for manufacturing an electrode sheet according to claim 9, wherein the original sheet feeding part, the press roll pair, and the electrode sheet receiving part are placed in a positional relationship to set a winding angle of the original electrode sheet and the electrode sheet on the inner roll in a range of 30° to 120°. ### Claim 12 (depends on 10) The apparatus for manufacturing an electrode sheet according to claim 10, wherein the original sheet feeding part, the press roll pair, and the electrode sheet receiving part are placed in a positional relationship to set a winding angle of the original electrode sheet and the electrode sheet on the inner roll in a range of 30° to 120°. ### Claim 13 (depends on 9) The apparatus for manufacturing an electrode sheet according to claim 9, wherein the original sheet feeding part feeds out the original electrode sheet in which the unfinished electrode layers corresponding to both surfaces are different in density from each other such that the unfinished electrode layer with a higher density than the other unfinished electrode layer faces the inner roll in the press roll pair. ### Claim 14 (depends on 10) The apparatus for manufacturing an electrode sheet according to claim 10, wherein the original sheet feeding part feeds out the original electrode sheet in which the unfinished electrode layers corresponding to both surfaces are different in density from each other such that the unfinished electrode layer with a higher density than the other unfinished electrode layer faces the inner roll in the press roll pair. ### Claim 15 (depends on 11) The apparatus for manufacturing an electrode sheet according to claim 11, wherein the original sheet feeding part feeds out the original electrode sheet in which the unfinished electrode layers corresponding to both surfaces are different in density from each other such that the unfinished electrode layer with a higher density than the other unfinished electrode layer faces the inner roll in the press roll pair. ### Claim 16 (depends on 12) The apparatus for manufacturing an electrode sheet according to claim 12, wherein the original sheet feeding part feeds out the original electrode sheet in which the unfinished electrode layers corresponding to both surfaces are different in density from each other such that the unfinished electrode layer with a higher density than the other unfinished electrode layer faces the inner roll in the press roll pair.