# US 2014/0193699 A1 · Electrode assembly and secondary battery having the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0193699 A1 - Document ID: US20140193699A1 - Status: Published application - Kind: A1 - Application number: 14/205,310 - Filed: 2014-03-11 - Published: 2014-07-10 - Earliest claimed: 2007-10-30 - Assignees: Samsung SDI Co., Ltd. - Applicants: Samsung SDI Co., Ltd. - Inventors: Jong-Ku Kim; Yoo-Eup Hyung - Web page: https://patentgrep.com/patent/US20140193699A1 ## CPC - H01M 50/461: {with adhesive layers between electrodes and separators} - H01M 4/0404: {by coating on electrode collectors} - H01M 4/64: Carriers or collectors - H01M 4/765: {Tubular type or pencil type electrodes; tubular or multitubular sheaths or covers of insulating material for said tubular-type electrodes} - H01M 10/0431: {Cells with wound or folded electrodes (H01M10/045 takes precedence)} - H01M 10/14: Assembling a group of electrodes or separators - H01M 10/4235: {Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence)} - H01M 50/40: Separators; Membranes; Diaphragms; Spacing elements inside cells - H01M 50/474: characterised by their position inside the cells - 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 and a secondary battery having the same improve efficiency and stability of the secondary battery. The electrode assembly includes: a positive electrode plate having a positive electrode collector on which a positive electrode coating portion and a positive electrode non-coating portion are formed; a negative electrode plate having a negative electrode collector on which a negative electrode coating portion and a negative electrode non-coating portion are formed; a separator disposed between the positive electrode plate and the negative electrode plate; and an insulating member disposed on one side of the positive or negative electrode non-coating portion, and formed adjacent to at least one of the ends of the positive electrode coating portion and/or at least one of the end of the negative electrode coating portion. The electrode assembly at least prevents damage to a separator generated due to non-uniformity of the ends of the electrode coating portion. ## Claims ### Claim 1 A secondary battery, comprising: an outer casing; and an electrode assembly accommodated in the outer casing, the electrode assembly comprising: a positive electrode plate including a positive electrode collector on which a positive electrode coating portion and a positive electrode non-coating portion are formed; a negative electrode plate including a negative electrode collector on which a negative electrode coating portion and a negative electrode non-coating portion are formed; a separator disposed between the positive electrode plate and the negative electrode plate; and an insulating member disposed at the positive or negative electrode non-coating portion and formed adjacent to at least one of the ends of the positive electrode coating portion and/or at least one of the ends of the negative electrode coating portion. ### Claim 2 (depends on 1) The battery of claim 1, wherein the outer casing has a cylinder shape, a prismatic shape, or a pillar shape having rounded corners. ### Claim 3 (depends on 2) The battery of claim 2, further comprising a cap assembly disposed in an opening at one end of the outer casing. ### Claim 4 (depends on 1) The battery of claim 1, wherein the outer casing is formed in a pouch shape. ### Claim 5 (depends on 1) The battery of claim 1, wherein the insulating member is spaced 3.5 mm or less from the end of the positive electrode coating portion or the negative electrode coating portion. ### Claim 6 (depends on 1) The battery of claim 1, wherein the thickness of the insulating member is more than 24 μm and less than a thickness of an adjacent one of the positive electrode coating portion or the negative electrode coating portion. ### Claim 7 (depends on 1) The battery of claim 1, wherein the insulating member comprises an adhesive layer disposed on the positive or negative electrode collector and an insulating film adhered to a surface of the adhesive layer opposite the positive or negative electrode collector. ### Claim 8 (depends on 7) The battery of claim 7, wherein the adhesive layer is not in contact with the positive electrode coating portion or the negative electrode coating portion. ### Claim 9 (depends on 1) The battery of claim 1, wherein the positive electrode coating portion and the negative electrode coating portion each comprise a uniform region in which slurry for the positive or negative electrode is uniformly applied, and non-uniform regions in which slurry for the positive or negative electrode is not uniformly applied. ### Claim 10 (depends on 9) The battery of claim 9, wherein the distance between the insulating member and the positive electrode coating portion or the negative electrode coating portion is the same as width of the non-uniform regions or less. ### Claim 11 (depends on 9) The battery of claim 9, wherein the insulating member comprises an adhesive layer and an insulating film adhered to one surface of the adhesive layer, and the insulating film covers an adjacent non-uniform region. ### Claim 12 (depends on 9) The battery of claim 9, wherein the non-uniform regions comprise a starting part in which the application of the slurry for the positive or negative electrode starts and an ending part in which the application of the slurry for the positive or negative electrode is terminated. ### Claim 13 (depends on 12) The battery of claim 12, wherein the starting part is thicker than the uniform region, and the ending part is thinner than the uniform region. ### Claim 14 (depends on 12) The battery of claim 12, wherein the thickness of the insulating member adjacent to the starting part is the same as that of the starting part.