# US 12,183,870 B2 · Method for producing a cathode apparatus, method for producing an electrode assembly, and battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,183,870 B2 - Document ID: US12183870B2 - Status: Granted - Kind: B2 - Application number: 17/291,801 - Filed: 2019-10-21 - Published: 2022-01-27 - Granted: 2024-12-31 - Earliest claimed: 2018-11-07 - Assignees: Volkswagen Aktiengesellschaft - Applicants: Volkswagen Aktiengesellschaft - Inventors: Alexander Tornow; Sven Rathmann; Kai Stuehm-Van Doren - Web page: https://patentgrep.com/patent/US12183870B2 ## CPC - H01M 10/0459: {Cells or batteries with folded separator between plate-like electrodes} - H01M 4/043: {involving compressing or compaction} - H01M 4/0435: {Rolling or calendering} - H01M 4/139: Processes of manufacture - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 10/0583: of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators - H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators - H01M 50/406: Moulding; Embossing; Cutting - H01M 50/46: Separators, membranes or diaphragms characterised by their combination with electrodes - H01M 2004/028: {Positive electrodes} - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - 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 The invention relates to a method for producing a cathode apparatus (16) for a battery (8), especially of a motor vehicle (2), whereby a cathode strip (20) is provided, whereby a cathode (16a) is cut out of the cathode strip (20), whereby the cathode (16a) is placed between two strip-shaped separator foils (16d), and whereby, in a joint step, the two separator foils (16d) are cut to size in an area that protrudes beyond the cathode (16a), thereby forming appropriate separator foil cutouts (16f), and these two separator foil cutouts (16f) are also joined to each other in this area, especially fused together. Furthermore, the invention relates to a method for producing a cathode apparatus (16), whereby a single strip-shaped separator foil (16d) is folded and arranged on the cathode (16a) in such a way that the folded edge of the separator foil (16d) adjoins a contact face (38) of the cathode (16a) and so that the cathode (16a) is covered on both sides by a separator foil section (16g) of the separator foil (16d). Furthermore, the invention relates to a method for producing an electrode assembly (12) having such a cathode apparatus (16), to a battery (8) having such an electrode assembly (12), as well as to a motor vehicle (2) having such a battery (8). ## Claims ### Claim 1 A method for producing a cathode apparatus for a battery, comprising: providing a cathode strip, cutting a cathode out of the cathode strip, placing the cathode between two strip-shaped separator foils, and in a joint step, cutting the two separator foils to size in an area that protrudes beyond the cathode, thereby forming corresponding separator foil cutouts, and joining the resulting two separator foil cutouts to each other in this area by fusing them together, wherein, in the joint step, a heated rotary blade is used to cut and to join the two separator foil cutouts. ### Claim 2 A method for producing a cathode apparatus for a battery, comprising: providing a cathode strip, cutting a cathode out of the cathode strip, folding and arranging a single strip-shaped separator foil on the cathode, thus creating a folded edge along a lengthwise direction of the strip, in such a way that the folded edge of the separator foil adjoins a contact face of the cathode and that the cathode is covered on both sides by a separator foil section of the separator foil, in a joint step, cutting the separator foil to size in an area of the faces of the cathode extending beyond the cathode, said area facing away from the contact face, and joining the resulting two separator foil sections to each other by fusing them together, wherein, in the joint step, a heated rotary blade is used to cut and to join the two separator foil cutouts. ### Claim 3 (depends on 2) The method according to claim 2, further comprising laminating the cathode with the separator foil sections in one single step before the separator foil is cut to size. ### Claim 4 (depends on 2) A method for producing an electrode assembly, comprising providing an anode, producing a cathode apparatus according to claim 2 which is cut to size in such a way that a dimension of its separator foil sections matches a dimension of the anode, and stacking and aligning the anode and the cathode apparatus relative to each other by means of a stop. ### Claim 5 (depends on 4) A battery having an electrode assembly produced according to claim 4. ### Claim 6 (depends on 5) A motor vehicle having a battery according to claim 5. ### Claim 7 (depends on 1) The method according to claim 1, further comprising laminating the cathode with the separator foil cutouts in one single step before the separator foils are cut to size. ### Claim 8 (depends on 1) A method for producing an electrode assembly, comprising providing an anode, producing a cathode apparatus according to claim 1 which is cut to size in such a way that a dimension of its separator foil cutouts matches a dimension of the anode, and stacking and aligning the anode and the cathode apparatus relative to each other by means of a stop. ### Claim 9 (depends on 8) A battery having an electrode assembly produced according to claim 8. ### Claim 10 (depends on 9) A motor vehicle having a battery according to claim 9.