# US 12,224,403 B2 · All-solid-state battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,403 B2 - Document ID: US12224403B2 - Status: Granted - Kind: B2 - Application number: 17/436,158 - Filed: 2020-03-09 - Published: 2022-05-05 - Granted: 2025-02-11 - Earliest claimed: 2019-03-07 - Assignees: TDK Corporation - Applicants: TDK Corporation - Inventors: Kazumasa Tanaka; Tetsuya Ueno - Web page: https://patentgrep.com/patent/US12224403B2 ## CPC - H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators - H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof - H01M 10/0562: Solid materials - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 2004/021: {Physical characteristics, e.g. porosity, surface area} - H01M 2004/027: {Negative electrodes} - H01M 2004/028: {Positive electrodes} - 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 This all-solid-state battery includes a laminate in which a positive electrode layer and a negative electrode layer are alternately laminated with a solid electrolyte layer interposed therebetween. The positive electrode layer includes a first positive electrode end portion exposed on a first side surface of the laminate. The negative electrode layer includes a second negative electrode end portion not exposed on the first side surface of the laminate. The all-solid-state battery includes a first uneven part formed on the first side surface of the laminate. ## Claims ### Claim 1 An all-solid-state battery comprising a laminate in which: a positive electrode layer including a positive electrode current collector layer and a positive electrode active material layer; and a negative electrode layer including a negative electrode current collector layer and a negative electrode active material layer, are alternately laminated with a solid electrolyte layer interposed therebetween, wherein the positive electrode layer includes a first positive electrode end portion exposed on a first side surface of the laminate and a second positive electrode end portion not exposed on a second side surface on a side opposite to the first side surface, the negative electrode layer includes a first negative electrode end portion exposed on the second side surface of the laminate and a second negative electrode end portion not exposed on the first side surface of the laminate, and the laminate includes at least one of a first uneven part formed on the first side surface of the laminate and a second uneven part formed on the second side surface of the laminate, the laminate includes a third side surface positioned to a lateral side of the first side surface and the second side surface, the positive electrode layer includes a third positive electrode end portion positioned to a lateral side of the first positive electrode end portion and the second positive electrode end portion and configured to be exposed on the third side surface, the negative electrode layer includes a third negative electrode end portion positioned to a lateral side of the first negative electrode end portion and the second negative electrode end portion and configured to be exposed on the third side surface, and a third uneven part is provided to be formed on the third side surface of the laminate. ### Claim 2 (depends on 1) The all-solid-state battery according to claim 1, wherein the laminate further includes: a positive electrode margin layer disposed between the second positive electrode end portion and the second side surface and interposed between two solid electrolyte layers adjacent to each other; and a negative electrode margin layer disposed between the second negative electrode end portion and the first side surface and interposed between two solid electrolyte layers adjacent to each other. ### Claim 3 (depends on 2) The all-solid-state battery according to claim 2, wherein a ten-point average roughness Rzjis of the first side surface is 1.0 μm or more in a lamination direction of the laminate. ### Claim 4 (depends on 3) The all-solid-state battery according to claim 3, wherein the ten-point average roughness Rzjis of the first side surface is 12.0 μm or less in the lamination direction of the laminate. ### Claim 5 (depends on 2) The all-solid-state battery according to claim 2, wherein a first protruding part of the first uneven part is formed by the first positive electrode end portion, and a first recessed part of the first uneven part is formed by the solid electrolyte layer and the negative electrode margin layer. ### Claim 6 (depends on 2) The all-solid-state battery according to claim 2, wherein a first protruding part of the first uneven part is formed by the solid electrolyte layer and the negative electrode margin layer, and a first recessed part of the first uneven part is formed by the first positive electrode end portion. ### Claim 7 (depends on 2) The all-solid-state battery according to claim 2, wherein a ten-point average roughness Rzjis of the second side surface is 1.0 μm or more in the lamination direction of the laminate. ### Claim 8 (depends on 7) The all-solid-state battery according to claim 7, wherein the ten-point average roughness Rzjis of the second side surface is 12.0 μm or less in the lamination direction of the laminate. ### Claim 9 (depends on 2) The all-solid-state battery according to claim 2, wherein a second protruding part of the second uneven part is formed by the first negative electrode end portion, and a second recessed part of the second uneven part is formed by the solid electrolyte layer and the positive electrode margin layer. ### Claim 10 (depends on 2) The all-solid-state battery according to claim 2, wherein a second protruding part of the second uneven part is formed by the solid electrolyte layer and the positive electrode margin layer, and a second recessed part of the second uneven part is formed by the first negative electrode end portion. ### Claim 11 (depends on 1) The all-solid-state battery according to claim 1, wherein a ten-point average roughness Rzjis of the first side surface is 1.0 μm or more in a lamination direction of the laminate. ### Claim 12 (depends on 11) The all-solid-state battery according to claim 11, wherein the ten-point average roughness Rzjis of the first side surface is 12.0 μm or less in the lamination direction of the laminate. ### Claim 13 (depends on 1) The all-solid-state battery according to claim 1, wherein a first protruding part of the first uneven part is formed by the first positive electrode end portion, and a first recessed part of the first uneven part is formed by the solid electrolyte layer. ### Claim 14 (depends on 1) The all-solid-state battery according to claim 1, wherein a first protruding part of the first uneven part is formed by the solid electrolyte layer, and a first recessed part of the first uneven part is formed by the first positive electrode end portion. ### Claim 15 (depends on 1) The all-solid-state battery according to claim 1, wherein a ten-point average roughness Rzjis of the second side surface is 1.0 μm or more in the lamination direction of the laminate. ### Claim 16 (depends on 15) The all-solid-state battery according to claim 15, wherein the ten-point average roughness Rzjis of the second side surface is 12.0 μm or less in the lamination direction of the laminate. ### Claim 17 (depends on 1) The all-solid-state battery according to claim 1, wherein a second protruding part of the second uneven part is formed by the first negative electrode end portion, and a second recessed part of the second uneven part is formed by the solid electrolyte layer. ### Claim 18 (depends on 1) The all-solid-state battery according to claim 1, wherein a second protruding part of the second uneven part is formed by the solid electrolyte layer, and a second recessed part of the second uneven part is formed by the first negative electrode end portion. ### Claim 19 (depends on 1) The all-solid-state battery according to claim 1, wherein a ten-point average roughness Rzjis of the third side surface is 1.0 μm or more in the lamination direction of the laminate. ### Claim 20 (depends on 19) The all-solid-state battery according to claim 19, wherein a ten-point average roughness Rzjis of the third side surface is 12.0 μm or less in the lamination direction of the laminate. ### Claim 21 (depends on 1) The all-solid-state battery according to claim 1, wherein a third protruding part of the third uneven part is formed by at least one of the third positive electrode end portion and the third negative electrode end portion, and a third recessed part of the third uneven part is formed by the solid electrolyte layer. ### Claim 22 (depends on 1) The all-solid-state battery according to claim 1, wherein a third protruding part of the third uneven part is formed by the solid electrolyte layer, and a third recessed part of the third uneven part is formed by at least one of the third positive electrode end portion and the third negative electrode end portion.