# US 11,444,331 B2 · Battery cell 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 11,444,331 B2 - Document ID: US11444331B2 - Status: Granted - Kind: B2 - Application number: 16/652,521 - Filed: 2020-01-21 - Published: 2021-07-15 - Granted: 2022-09-13 - Earliest claimed: 2019-02-26 - Assignees: Ningde Amperex Technology Limited - Applicants: Ningde Amperex Technology Limited - Inventors: Dongyang Yan; Liangzhen Xiao - Web page: https://patentgrep.com/patent/US11444331B2 ## CPC - H01M 10/058: Construction or manufacture - H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators - H01M 10/0413: {Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes} - H01M 10/0436: {Small-sized flat cells or batteries for portable equipment} - H01M 50/102: characterised by their shape or physical structure - H01M 50/183: Sealing members - H01M 50/463: Separators, membranes or diaphragms characterised by their shape - H01M 50/105: Pouches or flexible bags - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY ## Abstract The present application relates to a battery cell and an electronic device. The battery cell according to an embodiment comprises: an electrode assembly, including an electrode plate; and a shell, receiving the electrode assembly and including a first edge seal, a second edge seal and a circular edge seal connecting the first edge seal and the second edge seal, wherein the circular edge seal defines a virtual circular arc region with a radius R and a radian angle Ø, wherein the electrode plate has a first edge, a second edge, and a third edge connecting the first edge and the second edge, and a virtual extension line of the first edge and a virtual extension line of the second edge intersect to form a virtual intersection point A; a point on the third edge has a minimum distance L relative to the virtual intersection point A; and the virtual extension lines of the first edge and the second edge form a corner at the virtual intersection point A toward the third edge, and an angle of the corner is greater than 0 degrees and less than 180 degrees. The battery cell and the electronic device provided by the present application have higher safety performance, a higher space utilization ratio and a higher energy density. ## Claims ### Claim 1 A battery cell, comprising: an electrode assembly, including an electrode plate; and a shell, receiving the electrode assembly and including a first edge seal, a second edge seal and a circular edge seal connecting the first edge seal and the second edge seal, wherein the circular edge seal defines a virtual circular arc region with a radius R and a radian angle Ø, wherein, the electrode plate has a first edge, a second edge and a third edge connecting the first edge and the second edge, and a virtual extension line of the first edge and a virtual extension line of the second edge intersect to form a virtual intersection point A; a point on the third edge has a minimum distance L relative to the virtual intersection point A; and the virtual extension line of the first edge and the virtual extension line of the second edge form a corner at the virtual intersection point A toward the third edge, and an angle of the corner is greater than 0 degrees and less than 180 degrees, wherein the virtual intersection point A is located in the virtual circular arc region, and the minimum distance L is ( R - D ⁢ 1 ) 2 + ( R - D ⁢ 2 ) 2 2 , wherein D1 is a vertical distance from the first edge to the first edge seal, and D2 is a vertical distance from the second edge to the second edge seal, or the virtual intersection point A is located outside the virtual circular arc region, a vertical distance from the first edge to the first edge seal is D1, and a vertical distance from the second edge to the second edge seal is D2; and a minimum distance from the virtual intersection point A to the third edge is L2, and L2 is equal to the smaller one of D1 and D2. ### Claim 2 (depends on 1) The battery cell according to claim 1, wherein the third edge comprises a circular arc, a straight line or an irregular curve. ### Claim 3 (depends on 1) The battery cell according to claim 1, wherein the third edge is a circular arc with a radius greater than R, and the third edge is convex toward the circular edge seal. ### Claim 4 (depends on 1) The battery cell according to claim 1, wherein an angle of the radian angle Ø is greater than or equal to 0 degrees and less than or equal to 180 degrees. ### Claim 5 (depends on 1) The battery cell according to claim 1, wherein an angle of the radian angle Ø is greater than or equal to 0 degrees and less than or equal to 90 degrees. ### Claim 6 (depends on 1) The battery cell according to claim 1, wherein the electrode plate comprises a first electrode plate and a second electrode plate; and a separator is disposed between the first electrode plate and the second electrode plate. ### Claim 7 (depends on 6) The battery cell according to claim 6, wherein the separator is configured to fit a shape of the electrode plate, and the separator extends beyond edges of the electrode plate. ### Claim 8 An electronic device, comprising a battery cell, the battery cell comprises: an electrode assembly, including an electrode plate; and a shell, receiving the electrode assembly and including a first edge seal, a second edge seal and a circular edge seal connecting the first edge seal and the second edge seal, wherein the circular edge seal defines a virtual circular arc region with a radius R and a radian angle Ø, wherein, the electrode plate has a first edge, a second edge and a third edge connecting the first edge and the second edge, and a virtual extension line of the first edge and a virtual extension line of the second edge intersect to form a virtual intersection point A; a point on the third edge has a minimum distance L relative to the virtual intersection point A; and the virtual extension line of the first edge and the virtual extension line of the second edge form a corner at the virtual intersection point A toward the third edge, and an angle of the corner is greater than 0 degrees and less than 180 degrees, wherein the virtual intersection point A is located in the virtual circular arc region, and the minimum distance L is ( R - D ⁢ 1 ) 2 + ( R - D ⁢ 2 ) 2 2 , wherein D1 is a vertical distance from the first edge to the first edge seal, and D2 is a vertical distance from the second edge to the second edge seal, or the virtual intersection point A is located outside the virtual circular arc region, a vertical distance from the first edge to the first edge seal is D1, and a vertical distance from the second edge to the second edge seal is D2; and a minimum distance from the virtual intersection point A to the third edge is L2, and L2 is equal to the smaller one of D1 and D2. ### Claim 9 (depends on 8) The electronic device according to claim 8, wherein the third edge comprises a circular arc, a straight line or an irregular curve. ### Claim 10 (depends on 8) The electronic device according to claim 8, wherein the third edge is a circular arc with a radius greater than R, and the third edge is convex toward the circular edge seal. ### Claim 11 (depends on 8) The electronic device according to claim 8, wherein an angle of the radian angle Ø is greater than or equal to 0 degrees and less than or equal to 180 degrees. ### Claim 12 (depends on 8) The electronic device according to claim 8, wherein an angle of the radian angle Ø is greater than or equal to 0 degrees and less than or equal to 90 degrees. ### Claim 13 (depends on 8) The electronic device according to claim 8, wherein the electrode plate comprises a first electrode plate and a second electrode plate; and a separator is disposed between the first electrode plate and the second electrode plate. ### Claim 14 (depends on 13) The electronic device according to claim 13, wherein the separator is configured to fit a shape of the electrode plate, and the separator extends beyond edges of the electrode plate.