# US 12,224,392 B2 · Electrode assembly and method of manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,392 B2 - Document ID: US12224392B2 - Status: Granted - Kind: B2 - Application number: 17/877,353 - Filed: 2022-07-29 - Published: 2022-11-17 - Granted: 2025-02-11 - Earliest claimed: 2018-11-19 - Assignees: Samsung SDI Co., Ltd. - Applicants: Samsung SDI Co., Ltd. - Inventors: Kyoungheon Heo; Kwanseop Song; Jinho So - Web page: https://patentgrep.com/patent/US12224392B2 ## CPC - H01M 10/0431: {Cells with wound or folded electrodes (H01M10/045 takes precedence)} - H01M 10/052: Li-accumulators - H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators - H01M 50/417: Polyolefins - H01M 50/461: {with adhesive layers between electrodes and separators} - H01M 50/474: characterised by their position inside the cells - H01M 50/486: Organic material - 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 An electrode assembly includes: a plurality of positive electrodes and a plurality of negative electrodes, alternately and repeatedly stacked; a separator between the positive electrodes and the negative electrodes, respectively, to protrude from the positive electrodes and the negative electrodes and stacked such that surfaces at edges of the separator face each other; and a fixing member including an adhesive layer adhered to the surfaces of the separator. ## Claims ### Claim 1 An electrode assembly comprising: a plurality of positive electrodes and a plurality of negative electrodes, alternately and repeatedly stacked; a separator between the positive electrodes and the negative electrodes, respectively, to protrude from the positive electrodes and the negative electrodes and stacked such that surfaces at edges of the separator face each other; and a fixing member comprising an adhesive layer adhered to the surfaces of the separator at an end where an uncoated region of the positive electrodes and the negative electrodes is formed, the adhesive layer being arranged at opposite sides of the electrode assembly. ### Claim 2 (depends on 1) The electrode assembly of claim 1, wherein the fixing member comprises at least two fixing members, and a length of each of the fixing members is 20 mm or more along a longitudinal direction in a plan view. ### Claim 3 (depends on 1) The electrode assembly of claim 1, wherein the adhesive layer is spaced apart from ends of the positive electrodes and the negative electrodes. ### Claim 4 (depends on 1) The electrode assembly of claim 1, wherein the adhesive layer surrounds ends of the separator. ### Claim 5 (depends on 1) The electrode assembly of claim 1, wherein the fixing member further comprises an insulating member adhered to an upper surface of the separator and a lower surface of the separator. ### Claim 6 (depends on 1) The electrode assembly of claim 1, wherein the adhesive layer is arranged at a regular interval along the edges of the separator. ### Claim 7 (depends on 1) The electrode assembly of claim 1, wherein the adhesive layer is continuously linear in a direction in which the separator overlaps. ### Claim 8 (depends on 7) The electrode assembly of claim 7, wherein the adhesive layer is inclined with respect to the direction in which the separator overlaps. ### Claim 9 (depends on 1) The electrode assembly of claim 1, wherein the separator comprises a polyolefin series, and the fixing member comprises a polyolefin grafted with maleic anhydride. ### Claim 10 A manufacturing method of an electrode assembly, the manufacturing method comprising: forming an electrode assembly by alternately and repeatedly stacking positive electrodes, a separator, and negative electrodes; applying a solution-type adhesive to a sidewall of the electrode assembly; and forming an adhesive layer at opposite sides of the electrode assembly by curing the solution-type adhesive, wherein the solution-type adhesive is applied in a direction in which the separator overlaps by using a nozzle-type applicator. ### Claim 11 (depends on 10) The manufacturing method of claim 10, wherein the adhesive layer comprises a plurality of adhesive layers arranged at a regular interval. ### Claim 12 (depends on 10) The manufacturing method of claim 10, wherein the adhesive layer has an area of 95% or less with respect to an area of the sidewall. ### Claim 13 (depends on 10) The manufacturing method of claim 10, further comprising, after the forming of the adhesive layer, attaching an insulating member onto the adhesive layer, wherein the insulating member is attached to contact upper and lower surfaces of the electrode assembly. ### Claim 14 (depends on 10) The manufacturing method of claim 10, wherein, in the applying of the solution-type adhesive, the solution-type adhesive is coated to be spaced apart from ends of the positive electrodes and the negative electrodes. ### Claim 15 (depends on 10) The manufacturing method of claim 10, wherein, in the forming of the adhesive layer, the curing comprises thermosetting or UV curing. ### Claim 16 A manufacturing method of an electrode assembly, the manufacturing method comprising: forming an electrode assembly by alternately and repeatedly stacking positive electrodes, a separator, and negative electrodes; arranging a fixing member comprising an adhesive layer at opposite sides of the electrode assembly and an insulating member on a sidewall of the electrode assembly; and melting and then curing the adhesive layer, wherein the adhesive layer comprises a hot melt adhesive. ### Claim 17 (depends on 16) The manufacturing method of claim 16, wherein the fixing member comprises a plurality of fixing members arranged at a regular interval. ### Claim 18 (depends on 16) The manufacturing method of claim 16, wherein, in the curing, the adhesive layer is spaced apart from ends of the positive electrodes and the negative electrodes.