# US 12,191,530 B2 · Energy-storage device, electrical apparatus, and winding method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,191,530 B2 - Document ID: US12191530B2 - Status: Granted - Kind: B2 - Application number: 18/388,480 - Filed: 2023-11-09 - Published: 2024-05-16 - Granted: 2025-01-07 - Earliest claimed: 2022-11-11 - Assignees: Shenzhen Hithium Energy Storage Technology Co., Ltd.; Xiamen Hithium Energy Storage Technology Co., Ltd. - Applicants: Shenzhen Hithium Energy Storage Technology Co., Ltd.; Xiamen Hithium Energy Storage Technology Co., Ltd. - Inventors: Jinyun Liang; Liangliang Zhang; Wancai Zhang; Ming Yang - Web page: https://patentgrep.com/patent/US12191530B2 ## CPC - H01M 50/533: characterised by the shape of the leads or tabs - H01M 10/0431: {Cells with wound or folded electrodes (H01M10/045 takes precedence)} - H01M 10/0587: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators - H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence) - H01M 50/15: for prismatic or rectangular cells (H01M50/153 takes precedence) - H01M 50/531: Electrode connections inside a battery casing - H01M 50/536: characterised by the method of fixing the leads to the electrodes, e.g. by welding - H01M 50/538: Connection of several leads or tabs of wound or folded electrode stacks - H01M 10/052: Li-accumulators - 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 An energy-storage device, an electrical apparatus, and a winding method are provided in the disclosure. The energy-storage device includes an electrode and a separator, where the electrode and the separator are stacked and wound to form a cell. The electrode is connected with a tab at an end of the electrode in a width direction of the electrode, where the tab includes a first tab and at least one second tab. The first tab is positioned adjacent to an end of the electrode in a length direction of the electrode, and the first tab defines a U-shaped notch. The U-shaped notch is configured to indicate a winding end position of the electrode, facilitating identification and winding automation. ## Claims ### Claim 1 An energy-storage device, comprising an electrode and a separator, wherein the electrode and the separator are stacked and wound to form a cell, the electrode is connected with a tab at an end of the electrode in a width direction of the electrode, wherein the tab comprises a first tab and at least one second tab, and wherein the first tab is positioned adjacent to an end of the electrode in a length direction of the electrode, and the first tab defines a U-shaped notch for identification; the first tab has a first end away from the electrode, the U-shaped notch extends from the first end toward the electrode, the first tab has a round that protrudes outwards and is connected between an internal side wall of the U-shaped notch and the first end, wherein the first end of the first tab has a surface that is farther away from the electrode than the U-shaped notch in the width direction of the electrode, the internal side wall has an end that is farther away from the electrode than the rest of the internal side wall in the width direction of the electrode, and the round is connected between the surface of the first end of the first tab and the end of the internal side wall of the U-shaped notch; a ratio of a radius of the round to a width of the U-shaped notch is greater than 0.15 and less than 0.2, and a ratio of the radius of the round to a depth of the U-shaped notch is greater than 0.05 and less than 0.15; in the width direction of the electrode, the first tab has a width less than a width of each of the at least one second tab, a ratio of the width of the first tab to the width of each of the at least one second tab is greater than 0.5 and less than 1; and the energy-storage device further comprises a housing and a cover, wherein the cell is received in the housing, the cover is provided with an adaptor piece, and the tab is stacked and welded with the adaptor piece; the tab has a tab root at one side of the tab close to the electrode, and a distance that the adaptor piece extends beyond an end of each of the at least one second tab away from the tab root in the width direction is greater than or equal to 2 mm. ### Claim 2 (depends on 1) The energy-storage device of claim 1, wherein a ratio of the width of the U-shaped notch to the depth of the U-shaped notch is equal to or greater than 1.5 and less than 2. ### Claim 3 (depends on 1) The energy-storage device of claim 1, wherein a difference between the width of the first tab and the width of each of the at least one second tab is greater than or equal to 2 mm. ### Claim 4 (depends on 1) The energy-storage device of claim 1, wherein the first tab is provided with at least one of an indentation with identification information, an adhesive member with identification information, a coating pattern with identification information, or a printing pattern with identification information. ### Claim 5 (depends on 1) The energy-storage device of claim 1, wherein the electrode and the separator are wound to form the cell, the tab is disposed through stacking, and the first tab is located at one side of the tab away from a center of the tab in a thickness direction of the cell. ### Claim 6 (depends on 5) The energy-storage device of claim 5, wherein the tab is welded with the adaptor piece at a welding zone, and wherein on the first tab, a distance between the U-shaped notch and the welding zone is greater than 0.5 mm. ### Claim 7 (depends on 6) The energy-storage device of claim 6, wherein a distance between the welding zone and one side of the adaptor piece close to the tab root is greater than or equal to 2mm, and a distance between the welding zone and one side of the adaptor piece away from the tab root is greater than or equal to 10 mm. ### Claim 8 An electrical apparatus, comprising at least one energy-storage device configured to power the electrical apparatus, wherein each of the at least one energy-storage device comprises an electrode and a separator, wherein the electrode and the separator are stacked and wound to form a cell, the electrode is connected with a tab at an end of the electrode in a width direction of the electrode, wherein the tab comprises a first tab and at least one second tab, and wherein the first tab is positioned adjacent to an end of the electrode in a length direction of the electrode, and the first tab defines a U-shaped notch for identification; the first tab has a first end away from the electrode, the U-shaped notch extends from the first end toward the electrode, the first tab has a round that protrudes outwards and is connected between an internal side wall of the U-shaped notch and the first end, wherein the first end of the first tab has a surface that is farther away from the electrode than the U-shaped notch in the width direction of the electrode, the internal side wall has an end that is farther away from the electrode than the rest of the internal side wall in the width direction of the electrode, and the round is connected between the surface of the first end of the first tab and the end of the internal side wall of the U-shaped notch; a ratio of a radius of the round to a width of the U-shaped notch is greater than 0.15 and less than 0.2, and a ratio of the radius of the round to a depth of the U-shaped notch is greater than 0.05 and less than 0.15; in the width direction of the electrode, the first tab has a width less than a width of each of the at least one second tab, a ratio of the width of the first tab to the width of each of the at least one second tab is greater than 0.5 and less than 1; and the energy-storage device further comprises a housing and a cover, wherein the cell is received in the housing, the cover is provided with an adaptor piece, and the tab is stacked and welded with the adaptor piece; the tab has a tab root at one side of the tab close to the electrode, and a distance that the adaptor piece extends beyond an end of each of the at least one second tab away from the tab root in the width direction is greater than or equal to 2 mm. ### Claim 9 (depends on 8) The electrical apparatus of claim 8, wherein a ratio of the width of the U-shaped notch to the depth of the U-shaped notch is equal to or greater than 1.5 and less than 2. ### Claim 10 (depends on 8) The electrical apparatus of claim 8, wherein a difference between the width of the first tab and the width of each of the at least one second tab is greater than or equal to 2 mm. ### Claim 11 (depends on 8) The electrical apparatus of claim 8, wherein the first tab is provided with at least one of an indentation with identification information, an adhesive member with identification information, a coating pattern with identification information, or a printing pattern with identification information. ### Claim 12 (depends on 8) The electrical apparatus of claim 8, wherein the electrode and the separator are wound to form the cell, the tab is disposed through stacking, and the first tab is located at one side of the tab away from a center of the tab in a thickness direction of the cell. ### Claim 13 (depends on 12) The electrical apparatus of claim 12, wherein the tab is welded with the adaptor piece at a welding zone, and wherein on the first tab, a distance between the U-shaped notch and the welding zone is greater than 0.5 mm. ### Claim 14 (depends on 13) The electrical apparatus of claim 13, wherein a distance between the welding zone and one side of the adaptor piece close to the tab root is greater than or equal to 2 mm, and a distance between the welding zone and one side of the adaptor piece away from the tab root is greater than or equal to 10 mm.