# US 12,183,929 B2 · Energy storage device and method for 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 12,183,929 B2 - Document ID: US12183929B2 - Status: Granted - Kind: B2 - Application number: 17/281,897 - Filed: 2019-10-04 - Published: 2021-12-09 - Granted: 2024-12-31 - Earliest claimed: 2018-10-05 - Assignees: GS Yuasa International Ltd. - Applicants: GS Yuasa International Ltd. - Inventors: Satoru Kawakami; Hironori Aida; Koki Maeda; Yudai Kato - Web page: https://patentgrep.com/patent/US12183929B2 ## CPC - H01G 11/12: Stacked hybrid or EDL capacitors - H01M 4/64: Carriers or collectors - H01G 11/76: specially adapted for integration in multiple or stacked hybrid or EDL capacitors - H01G 11/82: Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations - H01M 4/04: Processes of manufacture in general - H01M 50/538: Connection of several leads or tabs of wound or folded electrode stacks - H01M 50/54: Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges - H01M 50/543: Terminals - H01G 11/78: Cases; Housings; Encapsulations; Mountings - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 50/531: Electrode connections inside a battery casing - Y02E 60/10: Energy storage using batteries - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10) - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An energy storage device includes a positive electrode terminal, an electrode assembly, and a positive electrode current collector connecting the positive electrode terminal and the electrode assembly, in which the positive electrode current collector has a terminal connecting portion connected to the positive electrode terminal, an electrode connecting portion connected to the electrode assembly in the first direction, and an intermediate portion connecting the terminal connecting portion and the electrode connecting portion, the intermediate portion is arranged at a position overlapping the terminal connecting portion when viewed in the first direction, and the electrode connecting portion and the terminal connecting portion are arranged on one side of the intermediate portion in the first direction. ## Claims ### Claim 1 An energy storage device comprising an electrode terminal, an electrode assembly, and a current collector connecting the electrode terminal and the electrode assembly, wherein the current collector includes a terminal connecting portion connected to the electrode terminal, an electrode connecting portion connected to the electrode assembly in a first direction, and an intermediate portion that connects the terminal connecting portion and the electrode connecting portion, wherein the intermediate portion is arranged at a position overlapping the terminal connecting portion when viewed in the first direction, and wherein the electrode connecting portion and the terminal connecting portion are arranged on one side of the intermediate portion in the first direction. ### Claim 2 (depends on 1) The energy storage device according to claim 1, wherein the electrode connecting portion is arranged at a position that does not overlap the terminal connecting portion when viewed in the first direction. ### Claim 3 (depends on 1) The energy storage device according to claim 1, wherein the electrode connecting portion is arranged in a second direction intersecting with the first direction of the intermediate portion, and the intermediate portion is connected to an end portion of the terminal connecting portion in a third direction intersecting with the first direction and the second direction. ### Claim 4 (depends on 1) The energy storage device according to claim 1, wherein the intermediate portion includes a bent portion that is bent or curved toward the electrode connecting portion at a connection part with the electrode connecting portion, and the bent portion is arranged at a position overlapping the terminal connecting portion when viewed in the first direction. ### Claim 5 (depends on 1) The energy storage device according to claim 1, further comprising a regulating portion that regulates at least one of the electrode connecting portion and the intermediate portion from moving in a direction away from the terminal connecting portion in the first direction. ### Claim 6 (depends on 1) The energy storage device according to claim 1, wherein the intermediate portion physically connects the terminal connecting portion to the electrode connecting portion. ### Claim 7 (depends on 1) The energy storage device according to claim 1, wherein the intermediate portion directly connects the terminal connecting portion to the electrode connecting portion. ### Claim 8 (depends on 1) The energy storage device according to claim 1, wherein the terminal connecting portion is not physically connected to the electrode connecting portion. ### Claim 9 (depends on 1) The energy storage device according to claim 1, wherein the terminal connecting portion is not directly connected to the electrode connecting portion. ### Claim 10 (depends on 1) The energy storage device according to claim 1, wherein the intermediate portion includes a first surface positioned close to the electrode assembly and a second surface opposite to the first surface in the first direction, and wherein the one side is a direction toward the second surface from the first surface in the first direction. ### Claim 11 (depends on 1) The energy storage device according to claim 1, wherein the electrode connecting portion connected to the electrode assembly in the first direction, the first direction comprises an arrangement direction of the current collector and the electrode assembly. ### Claim 12 A method for manufacturing an energy storage device including an electrode terminal, an electrode assembly, and a current collector connecting the electrode terminal and the electrode assembly, the current collector including a terminal connecting portion connected to the electrode terminal, an electrode connecting portion connected to the electrode assembly in a first direction, and an intermediate portion that connects the terminal connecting portion and the electrode connecting portion, the method for manufacturing the energy storage device comprising a bending step of bending the current collector so as to arrange the intermediate portion at a position overlapping the terminal connecting portion when viewed in the first direction, and arrange the electrode connecting portion and the terminal connecting portion on one side of the intermediate portion in the first direction. ### Claim 13 (depends on 12) The method for manufacturing the energy storage device according to claim 12, wherein in the bending step, the current collector is bent in two steps in an order of a first bending step and a second bending step, in the first bending step, the terminal connecting portion is brought close to the intermediate portion while supporting at least one of the electrode connecting portion and the intermediate portion from both sides in the first direction, and in the second bending step, the terminal connecting portion is brought closer to the intermediate portion while supporting at least one of the electrode connecting portion and the intermediate portion from a side opposite to the terminal connecting portion in the first direction. ### Claim 14 (depends on 12) The method for manufacturing the energy storage device according to claim 12, wherein the first direction comprises an arrangement direction of the current collector and the electrode assembly. ### Claim 15 (depends on 12) The method for manufacturing the energy storage device according to claim 12, wherein the intermediate portion physically connects the terminal connecting portion to the electrode connecting portion. ### Claim 16 (depends on 12) The method for manufacturing the energy storage device according to claim 12, wherein the intermediate portion directly connects the terminal connecting portion to the electrode connecting portion. ### Claim 17 (depends on 12) The method for manufacturing the energy storage device according to claim 12, wherein the terminal connecting portion is not physically connected to the electrode connecting portion. ### Claim 18 (depends on 12) The method for manufacturing the energy storage device according to claim 12, wherein the terminal connecting portion is not directly connected to the electrode connecting portion. ### Claim 19 (depends on 12) The method for manufacturing the energy storage device according to claim 12, wherein the intermediate portion includes a first surface positioned close to the electrode assembly and a second surface opposite to the first surface in the first direction, and wherein the one side is a direction toward the second surface from the first surface in the first direction. ### Claim 20 (depends on 12) The method for manufacturing the energy storage device according to claim 12, wherein from the bending step, the intermediate portion includes a bent portion that is bent or curved toward the electrode connecting portion at a connection part with the electrode connecting portion, and the bent portion is arranged at a position overlapping the terminal connecting portion when viewed in the first direction.