# US 12,224,421 B2 · Method of rolling electrode > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,421 B2 - Document ID: US12224421B2 - Status: Granted - Kind: B2 - Application number: 17/493,272 - Filed: 2021-10-04 - Published: 2022-05-05 - Granted: 2025-02-11 - Earliest claimed: 2020-11-05 - Assignees: LG Energy Solution, Ltd. - Applicants: LG Energy Solution, Ltd. - Inventors: Young In Hu; Kyu Bok Yeon - Web page: https://patentgrep.com/patent/US12224421B2 ## CPC - H01M 4/0435: {Rolling or calendering} - B29C 55/18: by squeezing between surfaces, e.g. rollers - H01M 4/0404: {by coating on electrode collectors} - H01M 4/139: Processes of manufacture - H01M 10/0587: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators - 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 - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - 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 The present invention relates to a method of rolling an electrode including a speed-changing rolling section, including: a step of inputting an electrode to a rolling device including at least one pair of rolling rolls; and a step of automatically adjusting a space between the rolling rolls according to a space compensation value between the rolling rolls according to a rolling speed change. ## Claims ### Claim 1 A method for rolling an electrode including a speed-changing rolling section, comprising: inputting an electrode to a rolling device including at least one pair of rolling rolls; and automatically adjusting a space between the rolling rolls according to a space compensation value between the rolling rolls, wherein the space compensation value is determined from a rolling speed change. ### Claim 2 (depends on 1) The method of claim 1, wherein the step of automatically adjusting the space between the rolling rolls includes the step of determining the space compensation value from a rolling speed-rolling space compensation value table. ### Claim 3 (depends on 2) The method of claim 2, wherein in an acceleration section where a rolling speed of the rolling rolls increases, a space between the rolling rolls is made to decrease by a first space compensation value, and wherein in a deceleration section where the rolling speed of the rolling rolls decreases, the space between the rolling rolls is made to increase by a second space compensation value. ### Claim 4 (depends on 3) The method of claim 3, wherein the rolling speed-rolling space compensation value table includes space compensation values between rolling rolls for one or more acceleration sections and one or more deceleration sections of the rolling rolls. ### Claim 5 (depends on 2) The method of claim 2, wherein the rolling speed-rolling space compensation value table further includes a space compensation value between rolling rolls for rolling speed changes of the rolling rolls caused by a job performed during the rolling. ### Claim 6 (depends on 2) The method of claim 2, wherein the rolling speed-rolling space compensation value table further includes a space compensation value between the rolling rolls according to a model of an electrode. ### Claim 7 (depends on 6) The method of claim 6, wherein the electrode is different in at least any one of a temperature and dryness, a coating pattern of an electrode active material, a loading amount of the electrode active material, composition of an electrode active material layer, a thickness and porosity. ### Claim 8 (depends on 2) The method of claim 2, wherein the rolling speed-rolling space compensation value table further includes a space compensation value for the at least one pair of rolling rolls. ### Claim 9 (depends on 2) The method of claim 2, wherein the rolling speed-rolling space compensation value table is derived by: manufacturing an electrode sample; changing a rolling speed of the electrode sample while rolling the electrode sample; measuring a space between rolling rolls according to a rolling speed change and building a database therefrom; and setting a compensation value for obtaining a targeted space from the database. ### Claim 10 (depends on 9) The method of claim 9, further including a step of measuring a space between rolling rolls by changing the rolling speed, and building the database therefrom. ### Claim 11 (depends on 9) The method of claim 9, further including a step of manufacturing electrode samples by models of the electrode and setting a compensation value therefrom. ### Claim 12 (depends on 2) The method of claim 2, wherein the space compensation value between the rolling rolls is determined by selecting a rolling speed-rolling space compensation value table corresponding to a model of an electrode, and calculating compensation values according to rolling speeds before and after the rolling speed change in the rolling speed-rolling space compensation value table. ### Claim 13 (depends on 1) The method of claim 1, further including a step of correcting a space between the rolling rolls in a constant-speed rolling section of the electrode. ### Claim 14 (depends on 13) The method of claim 13, wherein the step of correcting the space between the rolling rolls in the constant-speed rolling section includes measuring a thickness of the electrode and correcting the space between the rolling rolls by a difference between the measured thickness and a targeted thickness when the measured thickness is different from the targeted thickness.