# US 2025/0167409 A1 · Electrochemical device and electronic device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0167409 A1 - Document ID: US20250167409A1 - Status: Published application - Kind: A1 - Application number: 19/027,953 - Filed: 2025-01-17 - Published: 2025-05-22 - Earliest claimed: 2022-08-01 - Assignees: Ningde Amperex Technology Limited - Applicants: Ningde Amperex Technology Limited - Inventors: Dongyang YAN - Web page: https://patentgrep.com/patent/US20250167409A1 ## CPC - H01M 50/536: characterised by the method of fixing the leads to the electrodes, e.g. by welding - H01M 10/0587: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators - H01M 50/533: characterised by the shape of the leads or tabs - H01M 50/586: inside the batteries, e.g. incorrect connections of electrodes - H01M 50/595: Tapes - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - 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 electrochemical device includes a first electrode plate and a first conductive plate. The first electrode plate includes a first current collector and a first conductive material layer. The first conductive material layer is disposed on a first surface of the first current collector. The first conductive material layer is provided with a first opening, where a first region of the first surface exposed at the first opening. The first conductive plate is connected to the first region. The first electrode plate includes a first end edge, and the first end edge is provided with a first recess. When viewed from a first direction, the first recess is spaced apart from the first region. The first conductive plate covers a part of the first region, a part of the first conductive material layer, and a part of the first recess. ## Claims ### Claim 1 An electrochemical device, comprising an electrode assembly and a first conductive plate, wherein the electrode assembly comprises a first electrode plate, the first electrode plate comprises a first current collector and a first conductive material layer, the first current collector comprises a first surface, and the first conductive material layer is disposed on the first surface; wherein, the first conductive material layer is provided with a first opening, the first surface comprises a first region, the first region is configured to be a region of the first surface exposed at the first opening, and the first conductive plate is connected to the first region; and when viewed from a first direction, the first electrode plate comprises a first end edge and a second end edge disposed opposite to each other in a second direction, and the first electrode plate is provided with a first recess at the first end edge; when viewed from the first direction, the first recess is spaced apart from the first region; when viewed from the second direction, the first recess overlaps with the first region; when viewed from the first direction, the first conductive plate covers a part of the first region, the first conductive plate covers a part of the first conductive material layer, and the first conductive plate covers a part of the first recess; the first direction is perpendicular to the first region; and the second direction is perpendicular to the first direction. ### Claim 2 (depends on 1) The electrochemical device according to claim 1, wherein, when viewed from the first direction, the first recess comprises a first recess edge and a second recess edge disposed opposite to each other in a third direction, a third recess edge connecting the first recess edge and the second recess edge; the first recess edge, the second recess edge, and the third recess edge surround the first recess; and the third direction is perpendicular to both the first direction and the second direction. ### Claim 3 (depends on 2) The electrochemical device according to claim 2, wherein, when viewed from the first direction, the first end edge comprises a first connecting edge connecting to the first recess edge; the third recess edge and the first connecting edge both extend along the third direction; the first region comprises a fifth edge and a sixth edge disposed opposite to each other in the second direction, the fifth edge is disposed closer to the first recess than the sixth edge from the first recess; in the second direction, a distance from the first connecting edge to the third recess edge is a first distance L1, a distance from the third recess edge to the fifth edge is a second distance L2, and the first distance L1 is greater than the second distance L2. ### Claim 4 (depends on 3) The electrochemical device according to claim 3, wherein, 1 mm≤L1≤6 mm, and 0.3 mm≤L2≤4 mm. ### Claim 5 (depends on 4) The electrochemical device according to claim 4, wherein, 0.1≤L2/L1<1. ### Claim 6 (depends on 2) The electrochemical device according to claim 2, wherein, when viewed from the first direction, the first recess further comprises a fourth recess edge and a fifth recess edge; the fourth recess edge connects the first recess edge and the third recess edge; the fifth recess edge connects the second recess edge and the third recess edge; the fourth recess edge has a curved shape; and the fifth recess edge has a curved shape. ### Claim 7 (depends on 1) The electrochemical device according to claim 1, wherein, in the first direction, a thickness of the first conductive plate is less than a thickness of the first conductive material layer. ### Claim 8 (depends on 2) The electrochemical device according to claim 2, wherein, the first conductive plate comprises a first side and a second side disposed opposite to each other in the third direction, the first side is disposed closer to the first recess edge than the second side from the first recess edge; when viewed from the first direction, in the third direction, a distance from the first side to the first recess edge is a third distance L3, a distance from the second side to the second recess edge is a fourth distance L4, and the third distance L3 is not equal to the fourth distance L4. ### Claim 9 (depends on 2) The electrochemical device according to claim 2, wherein, the first electrode plate further comprises a second conductive material layer; the first current collector further comprises a second surface disposed opposite to the first surface in the first direction; the second conductive material layer is disposed on the second surface; the second conductive material layer is provided with a second opening; the second surface comprises a second region; the second region a region of the second surface exposed at the second opening; the first region overlaps with the second region in the first direction; and when viewed from the second direction, the second region overlaps with the first recess. ### Claim 10 (depends on 9) The electrochemical device according to claim 9, wherein, the second region is spaced apart from the first recess in the second direction. ### Claim 11 (depends on 10) The electrochemical device according to claim 10, wherein, when viewed from the first direction, the first region comprises a first edge and a second edge disposed opposite to each other in the third direction; the first edge and the first recess edge are located on a first side of the first conductive plate; the second edge and the second recess edge are located on a second side of the first conductive plate opposite to the first side; when viewed from the first direction, the second region comprises a third edge and a fourth edge disposed opposite to each other in the third direction; the first edge and the third edge are located on the first side of the first conductive plate; the second edge and the fourth edge are located on the second side of the first conductive plate; and when viewed from the first direction, the first edge and the third edge are staggered with each other in the third direction, and/or the second edge and the fourth edge are staggered with each other in the third direction. ### Claim 12 (depends on 11) The electrochemical device according to claim 11, wherein, when viewed from the first direction, the second region fully covers the first region. ### Claim 13 (depends on 9) The electrochemical device according to claim 9, wherein, the second region connects to the first recess. ### Claim 14 (depends on 1) The electrochemical device according to claim 1, wherein, the electrochemical device further comprises a first layer containing a first insulating material; the first layer is adhered to the first region; and the first conductive plate is disposed between the first region and the first layer. ### Claim 15 (depends on 14) The electrochemical device according to claim 14, wherein, when viewed from the first direction, the first layer fully covers the first opening and the first recess; and the first layer extends beyond the first end edge in the second direction. ### Claim 16 (depends on 1) The electrochemical device according to claim 1, wherein, the first conductive plate is welded to the first region. ### Claim 17 (depends on 1) The electrochemical device according to claim 1, wherein, the electrode assembly is a wound structure, and the first electrode plate is a positive electrode plate. ### Claim 18 An electronic device, comprising an electrochemical device, wherein the electrochemical device comprises an electrode assembly and a first conductive plate, the electrode assembly comprises a first electrode plate, the first electrode plate comprises a first current collector and a first conductive material layer, the first current collector comprises a first surface, and the first conductive material layer is disposed on the first surface; wherein, the first conductive material layer is provided with a first opening, the first surface comprises a first region, the first region is configured to be a region of the first surface exposed at the first opening, and the first conductive plate is connected to the first region; and when viewed from a first direction, the first electrode plate comprises a first end edge and a second end edge disposed opposite to each other in a second direction, and the first electrode plate is provided with a first recess at the first end edge; when viewed from the first direction, the first recess is spaced apart from the first region; when viewed from the second direction, the first recess overlaps with the first region; when viewed from the first direction, the first conductive plate covers a part of the first region, the first conductive plate covers a part of the first conductive material layer, and the first conductive plate covers a part of the first recess; the first direction is perpendicular to the first region; and the second direction is perpendicular to the first direction. ### Claim 19 (depends on 18) The electronic device according to claim 18, wherein, when viewed from the first direction, the first recess comprises a first recess edge and a second recess edge disposed opposite to each other in a third direction, a third recess edge connecting the first recess edge and the second recess edge; the first recess edge, the second recess edge, and the third recess edge surround the first recess; and the third direction is perpendicular to both the first direction and the second direction. ### Claim 20 (depends on 19) The electronic device according to claim 19, wherein, when viewed from the first direction, the first end edge comprises a first connecting edge connecting to the first recess edge; the third recess edge and the first connecting edge both extend along the third direction; the first region comprises a fifth edge and a sixth edge disposed opposite to each other in the second direction, the fifth edge is disposed closer to the first recess than the sixth edge from the first recess; in the second direction, a distance from the first connecting edge to the third recess edge is a first distance L1, a distance from the third recess edge to the fifth edge is a second distance L2, and the first distance L1 is greater than the second distance L2.