# US 12,015,177 B2 · Electrode assembly with improved connection between current collector and electrode tab 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 12,015,177 B2 - Document ID: US12015177B2 - Status: Granted - Kind: B2 - Application number: 16/969,386 - Filed: 2019-04-15 - Published: 2020-12-24 - Granted: 2024-06-18 - Earliest claimed: 2018-06-20 - Assignees: LG Energy Solution, Ltd. - Applicants: LG Chem, Ltd. - Inventors: Kyung Min Kim - Web page: https://patentgrep.com/patent/US12015177B2 ## CPC - H01M 50/528: Fixed electrical connections, i.e. not intended for disconnection - H01M 50/581: in response to temperature - H01M 10/04: Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence) - H01M 10/0587: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators - H01M 50/531: Electrode connections inside a battery casing - H01M 50/534: characterised by the material of the leads or tabs - H01M 50/536: characterised by the method of fixing the leads to the electrodes, e.g. by welding - H01M 50/574: Devices or arrangements for the interruption of current - H01M 2200/106: PTC - 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 An electrode assembly with improved connection between current collectors and electrode tabs, and a method for manufacturing the same, for assuring safety with respect to overcharge, and battery capacity by improving a connection structure between the electrode tab and the current collector are provided. The electrode assembly for a rechargeable battery includes: an electrode current collector; an uncoated region in which an electrode active material layer is not formed, and provided on one side of the electrode current collector; an electrode tab disposed in the uncoated region; and a conductive adhesion portion that is disposed between the uncoated region and the electrode tab. The conductive adhesion portion comprises a positive temperature coefficient (PTC) material. ## Claims ### Claim 1 An electrode comprising: an electrode current collector having a coated region on which an electrode active material is formed on a first side thereof and an uncoated region on which the electrode active material layer is not formed on the first side; an electrode tab disposed on the uncoated region of the electrode current collector; and a conductive adhesion portion that is disposed between the uncoated region of the electrode current collector and the electrode tab, wherein the conductive adhesion portion comprises a positive temperature coefficient (PTC) material, wherein the electrode tab is provided as a metal band-type member having a width and a length, wherein the electrode tab comprises an electrode tab overlapping portion stacked on the uncoated region and an electrode tab extension portion extending from the electrode tab overlapping portion to an outside of the electrode current collector, wherein the conductive adhesion portion is formed with a same shape and area as the electrode tab overlapping portion, wherein the electrode tab is not welded to the uncoated region of the electrode current collector, wherein the electrode current collector has a coated region of the electrode current collector on a second side opposite the first side, and the second side does not have an uncoated region of the electrode current collector, wherein the conductive adhesion portion further comprises an adhesive material and a conductive material, and wherein the adhesive material, the conductive material, and the PTC material form the conductive adhesion portion in the form of a slurry. ### Claim 2 (depends on 1) The electrode of claim 1, wherein the PTC material is silicon rubber or polyethylene. ### Claim 3 (depends on 1) The electrode of claim 1, wherein the conductive adhesion portion has a thickness of 10 micrometers or less. ### Claim 4 (depends on 1) A rechargeable battery comprising the electrode of claim 1. ### Claim 5 An electrode comprising: an electrode current collector having a coated region on which an electrode active material is formed on a first side thereof and an uncoated region on which the electrode active material layer is not formed on the first side; an electrode tab disposed on the uncoated region of the electrode current collector; and a conductive adhesion portion that is disposed between the uncoated region of the electrode current collector and the electrode tab, wherein the conductive adhesion portion comprises a positive temperature coefficient (PTC) material, wherein the electrode tab is provided as a metal band-type member having a width and a length, wherein the electrode tab comprises an electrode tab overlapping portion stacked on the uncoated region and an electrode tab extension portion extending from the electrode tab overlapping portion to an outside of the electrode current collector, wherein the conductive adhesion portion is formed with a same shape and area as the electrode tab overlapping portion, and wherein the electrode current collector has a coated region of the electrode current collector on a second side opposite the first side, and the second side does not have an uncoated region of the electrode current collector.