# US 2019/0173093 A1 · Current collector, electrode plate including the same and battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0173093 A1 - Document ID: US20190173093A1 - Status: Published application - Kind: A1 - Application number: 16/209,377 - Filed: 2018-12-04 - Published: 2019-06-06 - Earliest claimed: 2017-12-05 - Assignees: Contemporary Amperex Technology Co., Limited - Applicants: Contemporary Amperex Technology Co., Limited - Inventors: Chengdu LIANG; Huafeng HUANG; Zuyu WU; Qisen HUANG - Web page: https://patentgrep.com/patent/US20190173093A1 ## CPC - H01M 4/667: {in the form of layers, e.g. coatings} - H01M 4/0404: {by coating on electrode collectors} - H01M 4/661: {Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence)} - H01M 4/664: {Ceramic materials} - H01M 4/668: {Composites of electroconductive material and synthetic resins} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 4/662: {Alloys (collectors of lead alloys H01M4/685)} - H01M 4/663: {containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres} - H01M 10/052: Li-accumulators - H01M 2004/028: {Positive electrodes} - 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 The present disclosure provides a current collector, an electrode plate and a battery. The current collector includes an insulation layer and at least one conductive layer located on at least one surface of the insulation layer. The insulation layer is used to support the conductive layer, and the conductive layer is used to support an electrode active material layer. The conductive layer has a thickness of D2, and 300 nmD22 μm. The current collector further includes a protective layer provided on a surface of the conductive layer facing towards the insulation layer. The current collector according to the present disclosure can increase a short-circuit resistance in case of short circuit caused by the battery being abnormal, thereby resulting in protective effect on the conductive layer, and can also increase the bonding force between the insulation layer and the conductive layer, thereby increasing mechanical strength of the current collector. ## Claims ### Claim 1 A current collector, comprising an insulation layer; at least one conductive layer located above at least one surface of the insulation layer, wherein the insulation layer is used to support the at least one conductive layer, the at least one conductive layer is used to support an electrode active material layer, and the at least one conductive layer each has a thickness of D2, wherein 300 nmD22 μm; and a protective layer provided on a surface of each of the at least one conductive layer facing towards the insulation layer. ### Claim 2 (depends on 1) The current collector according to claim 1, wherein 500 nmD21.5 μm. ### Claim 3 (depends on 1) The current collector according to claim 1, wherein the at least one conductive layer is made of a material selected from at least one of a metallic conductive material and a carbon-based conductive material, wherein the metallic conductive material is preferably selected from a group consisting of aluminum, copper, nickel, titanium, silver, nickel-copper alloy, aluminum-zirconium alloy, or combinations thereof, and wherein the carbon-based conductive material is preferably selected from a group consisting of graphite, acetylene black, graphene, carbon nanotubes, or combinations thereof. ### Claim 4 (depends on 1) The current collector according to claim 1, wherein the insulation layer has a thickness of D1; wherein 1 μmD120 μm, preferably, 2 μmD110 μm, and more preferably, 2 μmD16 μm; and wherein preferably, the insulation layer is made of an organic polymer insulation material, which is preferably selected from a group consisting of polyamide, polyethylene terephthalate, polyimide, polyethylene, polypropylene, polystyrene, polyvinyl chloride, acrylonitrile butadiene styrene copolymers, polybutylene terephthalate, poly-p-phenylene terephthamide, ethylene propylene copolymer, polyformaldehyde, epoxy resin, phenol-formaldehyde resin, polytetrafluoroethylene, polyvinylidene fluoride, silicon rubber, polycarbonate, or combinations thereof. ### Claim 5 (depends on 1) The current collector according to claim 1, wherein the current collector is a positive current collector, and wherein the protective layer provided on the surface of the at least one conductive layer facing towards the insulation layer is made of a material selected from a group consisting of aluminum oxide, cobalt oxide, chromium oxide, nickel oxide, or combinations thereof. ### Claim 6 (depends on 5) The current collector according to claim 5, wherein the positive current collector further comprises a protective layer provided on a surface of the at least one conductive layer facing away from the insulation layer, and wherein the protective layer provided on the surface of the at least one conductive layer facing away from the insulation layer is made of a metallic material, which is selected from a group consisting of nickel, chromium, nickel-based alloy, copper-based alloy, or combinations thereof. ### Claim 7 (depends on 6) The current collector according to claim 6, wherein the protective layer provided on the surface of the at least one conductive layer facing towards the insulation layer has a thickness of D3, and D3 1/10 D2 and 1 nmD3200 nm, and preferably, 10 nmD350 nm; and wherein the protective layer provided on the surface of the at least one conductive layer facing away from the insulation layer has a thickness of D3′, and D3′ 1/10D2 and 1 nmD3′0.200 nm, preferably, 10 nD3′50 nm. ### Claim 8 (depends on 7) The current collector according to claim 7, wherein the thickness of the protective layer provided on the surface of the at least one conductive layer facing away from the insulation layer is larger than the thickness of the protective layer provided on the surface of the at least one conductive layer facing towards the insulation layer; and wherein ½ D3′D3⅘ D3′. ### Claim 9 An electrode plate, comprising a current collector and an electrode active material layer formed on the current collector, wherein the current collector comprises: an insulation layer; at least one conductive layer located above at least one surface of the insulation layer, wherein the insulation layer is used to support the at least one conductive layer, the at least one conductive layer is used to support the electrode active material layer, and the at least one conductive layer each has a thickness of D2, wherein 300 nmD22 μm; and a protective layer provided on a surface of each of the at least one conductive layer facing towards the insulation layer. ### Claim 10 (depends on 9) The electrode plate according to claim 9, wherein 500 nmD21.5 μm. ### Claim 11 (depends on 9) The electrode plate according to claim 9, wherein the at least one conductive layer is made of a material selected from at least one of a metallic conductive material and a carbon-based conductive material, wherein the metallic conductive material is preferably selected from a group consisting of aluminum, copper, nickel, titanium, silver, nickel-copper alloy, aluminum-zirconium alloy, or combinations thereof, and wherein the carbon-based conductive material is preferably selected from a group consisting of graphite, acetylene black, graphene, carbon nanotubes, or combinations thereof. ### Claim 12 (depends on 9) The electrode plate according to claim 9, wherein the insulation layer has a thickness of D1; wherein 1 μmD120 μm, preferably, 2 μmD110 μm, and more preferably, 2 μmD16 μm; and wherein preferably, the insulation layer is made of an organic polymer insulation material, which is preferably selected from a group consisting of polyamide, polyethylene terephthalate, polyimide, polyethylene, polypropylene, polystyrene, polyvinyl chloride, acrylonitrile butadiene styrene copolymers, polybutylene terephthalate, poly-p-phenylene terephthamide, ethylene propylene copolymer, polyformaldehyde, epoxy resin, phenol-formaldehyde resin, polytetrafluoroethylene, polyvinylidene fluoride, silicon rubber, polycarbonate, or combinations thereof. ### Claim 13 (depends on 9) The electrode plate according to claim 9, wherein the current collector is a positive current collector, and wherein the protective layer provided on the surface of the at least one conductive layer facing towards the insulation layer is made of a material selected from a group consisting of aluminum oxide, cobalt oxide, chromium oxide, nickel oxide, or combinations thereof. ### Claim 14 (depends on 13) The electrode plate according to claim 13, wherein the positive current collector further comprises a protective layer provided on a surface of the at least one conductive layer facing away from the insulation layer, and wherein the protective layer provided on the surface of the at least one conductive layer facing away from the insulation layer is made of a metallic material, which is selected from a group consisting of nickel, chromium, nickel-based alloy, copper-based alloy, or combinations thereof. ### Claim 15 A battery, comprising a positive electrode plate, a separator, and a negative electrode plate, wherein the positive electrode plate and/or the negative electrode plate is an electrode plate, wherein the electrode plate comprises a current collector and an electrode active material layer formed on the current collector, and the current collector comprises: an insulation layer; at least one conductive layer located above at least one surface of the insulation layer, wherein the insulation layer is used to support the at least one conductive layer, the at least one conductive layer is used to support the electrode active material layer, and the at least one conductive layer each has a thickness of D2, wherein 300 nmD212 μm; and a protective layer provided on a surface of each of the at least one conductive layer facing towards the insulation layer. ### Claim 16 (depends on 15) The battery according to claim 15, wherein 500 nmD212 μm. ### Claim 17 (depends on 15) The battery according to claim 15, wherein the at least one conductive layer is made of a material selected from at least one of a metallic conductive material and a carbon-based conductive material, wherein the metallic conductive material is preferably selected from a group consisting of aluminum, copper, nickel, titanium, silver, nickel-copper alloy, aluminum-zirconium alloy, or combinations thereof, and wherein the carbon-based conductive material is preferably selected from a group consisting of graphite, acetylene black, graphene, carbon nanotubes, or combinations thereof. ### Claim 18 (depends on 15) The battery according to claim 15, wherein the insulation layer has a thickness of D1; wherein 1 μmD120 μm, preferably, 2 μmD110 μm, and more preferably, 2 μmD16 μm; and wherein preferably, the insulation layer is made of an organic polymer insulation material, which is preferably selected from a group consisting of polyimide, polyethylene terephthalate, polyimide, polyethylene, polypropylene, polystyrene, polyvinyl chloride, acrylonitrile butadiene styrene copolymers, polybutylene terephthalate, poly-p-phenylene terephthamide, ethylene propylene copolymer, polyformaldehyde, epoxy resin, phenol-formaldehyde resin, polytetrafluoroethylene, polyvinylidene fluoride, silicon rubber, polycarbonate, or combinations thereof. ### Claim 19 (depends on 15) The battery according to claim 15, wherein the current collector is a positive current collector, and wherein the protective layer provided on the surface of the at least one conductive layer facing towards the insulation layer is made of a material selected from a group consisting of aluminum oxide, cobalt oxide, chromium oxide, nickel oxide, or combinations thereof. ### Claim 20 (depends on 19) The battery according to claim 19, wherein the positive current collector further comprises a protective layer provided on a surface of the at least one conductive layer facing away from the insulation layer, and wherein the protective layer provided on the surface of the at least one conductive layer facing away from the insulation layer is made of a metallic material, which is selected from a group consisting of nickel, chromium, nickel-based alloy, copper-based alloy, or combinations thereof.