# US 12,602,766 B2 · Method, apparatus, device, medium and product for detecting alignment of battery electrode plates > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,602,766 B2 - Document ID: US12602766B2 - Status: Granted - Kind: B2 - Application number: 18/364,711 - Filed: 2023-08-03 - Published: 2023-11-23 - Granted: 2026-04-14 - Earliest claimed: 2022-04-12 - Assignees: Contemporary Amperex Technology (Hong Kong) Limited - Applicants: Contemporary Amperex Technology (Hong Kong) Limited - Inventors: Pengfei Duan; Hongyuan Li; Qian Wu; Dajun Ni; Canbin Chen - Web page: https://patentgrep.com/patent/US12602766B2 ## CPC - G06T 7/0006: {using a design-rule based approach} - G01B 11/272: {using photoelectric detection means} - G06T 7/564: from contours - H01M 10/0404: {Machines for assembling 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 - G01B 11/0608: {Height gauges} - G06T 2207/10028: Range image; Depth image; 3D point clouds - G06T 2207/30136: Metal - Y02E 60/10: Energy storage using batteries - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS - 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 ## Abstract A method, an apparatus, a device, a medium and a product for detecting alignment of battery electrode plates are provided. The method includes: obtaining depth distances of a target cross section of the battery electrode plates after lamination molding, wherein the target cross section is perpendicular to an electrode plate setting direction of the battery electrode plates, and the depth distances of the target cross section includes the depth distance corresponding to each of the electrode plates; and determining an alignment detection result of the battery electrode plates based on the depth distances of the target cross section. According to embodiments of the present application, the depth distances of the target cross section of the battery electrode plates can be obtained after lamination molding of the battery electrode plates, the depth distances of the target cross section may include the corresponding depth distance of each electrode plate. ## Claims ### Claim 1 A method for detecting alignment of lamination molded battery electrode plates by an alignment detecting apparatus, wherein the alignment detecting apparatus comprises a light sensing device and a data processing device connected to the light sensing device, the method comprising: obtaining, by the light sensing device, depth distances of a target cross section of the battery electrode plates, wherein the target cross section is perpendicular to an electrode plate setting direction of the battery electrode plates, and each of the depth distances of the target cross section is corresponding to one of the electrode plates; and determining, by the data processing device, an alignment detection result of the battery electrode plates based on the depth distances of the target cross section obtained by the light sensing device; wherein determining the alignment detection result of the battery electrode plates based on the depth distances of the target cross section comprises: based on depth distances of N mark points comprised in the target cross section, determining peak points and trough points among the N mark points, to obtain P peak points and Q trough points, wherein the N mark points correspond to N electrode plates one to one, N is an integer greater than 1, and P and Q are both positive integers; and determining the alignment detection result of the battery electrode plates based on position information of the P peak points and the Q trough points. ### Claim 2 (depends on 1) The method of claim 1, wherein determining the peak points and the trough points among the N mark points, to obtain the P peak points and the Q trough points based on the depth distances of the N mark points comprised in the target cross section comprises: dividing the target cross section into M regions, wherein each of the M regions comprises a mark point corresponding to at least one positive electrode plate and a mark point corresponding to at least one negative electrode plate, respectively; and determining the peak point and the trough point in each of the M regions to obtain the P peak points and the Q trough points based on the depth distances of the mark points in each of the M regions. ### Claim 3 (depends on 1) The method of claim 1, wherein after determining the peak points and the trough points among the N mark points, to obtain P peak points and Q trough points based on the depth distances of the N mark points comprised in the target cross section, the method further comprises: determining a target peak point and a target trough point whose depth distance meets a preset depth condition among the P peak points and the Q trough points; and wherein determining the alignment detection result of the battery electrode plates based on the position information of the P peak points and the Q trough points comprises: determining the alignment detection result of the battery electrode plates based on position information of the target peak point and the target trough point. ### Claim 4 (depends on 3) The method of claim 3, wherein determining the target peak point and the target trough point whose depth distances meet the preset depth condition among the P peak points and the Q trough points comprises: determining the target peak point among the P peak points, the depth distance of the target peak point being in a first depth distance interval; and determining the target trough point among the Q trough points, the depth distance of the target trough point being in a second depth distance interval, a minimum value of the second depth distance interval being greater than a maximum value of the first depth distance interval. ### Claim 5 (depends on 1) The method of claim 1, wherein determining the alignment detection result of the battery electrode plates based on the position information of the P peak points and the Q trough points comprises: determining whether the P peak points and the Q trough points are arranged according to a preset rule based on the position information of the P peak points and the Q trough points; and determining that the alignment detection result of the battery electrode plates is qualified under a condition that the P peak points and the Q trough points are arranged according to the preset rule. ### Claim 6 (depends on 5) The method of claim 5, wherein determining that the alignment detection result of the battery electrode plates is qualified under the condition that the P peak points and the Q trough points are arranged according to the preset rule comprises: under the condition that the P peak points and the Q trough points are arranged according to the preset rule, determining whether the P peak points and the Q trough points meet a preset offset condition based on the depth distances of the P peak points and the Q trough points; and under a condition that the P peak points and the Q trough points meet the preset offset condition, determining that the alignment detection result of the battery electrode plates is qualified. ### Claim 7 (depends on 6) The method of claim 6, wherein under the condition that the P peak points and the Q trough points are arranged according to the preset rule, determining whether the P peak points and the Q trough points meet the preset offset condition based on the depth distances of the P peak points and the Q trough points comprises: under the condition that the P peak points and the Q trough points are arranged according to the preset rule, obtaining an offset amount of the depth distances between the mark point corresponding to an i-th electrode plate and the mark point corresponding to a (i+1)th electrode plate, wherein i is a positive integer; and under a condition that the offset amount is in a preset offset interval, determining that the P peaks points and the Q trough points meet the preset offset condition. ### Claim 8 (depends on 5) The method of claim 5, wherein before determining the alignment detection result of the battery electrode plates based on the position information of the P peak points and the Q trough points, the method further comprises: obtaining a peak line by fitting based on the position information of the P peak points; and calculating an inclination amount of the battery electrode plates based on the peak line; wherein under the condition that the P peak points and the Q trough points are arranged according to the preset rule, determining that the alignment detection result of the battery electrode plates is qualified comprises: under a condition that the inclination amount is less than or equal to a preset threshold, and the P peak points and the Q trough points are arranged according to the preset rule, determining that the alignment detection result of the battery electrode plates is qualified. ### Claim 9 (depends on 1) The method of claim 1, wherein obtaining the depth distances of the target cross section of the battery electrode plates comprises: under a condition that lamination completion information of the battery electrode plates is received, controlling a photographing device to move along a first direction, and taking an image of the battery electrode plates, the first direction being parallel to the electrode plate setting direction of the battery electrode plates; and determining the depth distance of the target cross section of the battery electrode plates based on the image. ### Claim 10 (depends on 1) The method according to claim 1, wherein the light sensing device comprises a photo sensor or a photographing device; the data processing device comprises a processor and a memory coupled with the processor; and the memory is configured to store program instructions for execution by the processor. ### Claim 11 An apparatus for detecting alignment of lamination molded battery electrode plates, comprising: a light sensing device, and a data processing device connected to the light sensing device; wherein the light sensing device is configured to obtain depth distances of a target cross section of the battery electrode plates, wherein the target cross section is perpendicular to an electrode plate setting direction of the battery electrode plates, and each of the depth distances of the target cross section is corresponding to one of the electrode plates; and wherein the data processing device is configured to determine an alignment detection result of the battery electrode plates based on the depth distances of the target cross section obtained by the light sensing device; wherein in determining the alignment detection result of the battery electrode plates based on the depth distances of the target cross section, the data processing device is configured to: based on the depth distances of N mark points comprised in the target cross section, determine peak points and trough points among the N mark points to obtain P peak points and Q trough points, wherein the N mark points correspond to N electrode plates one to one, N is an integer greater than 1, and P and Q are both positive integers; and determine the alignment detection result of the battery electrode plates based on position information of the P peak points and the Q trough points. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein in determining the peak points and the trough points among the N mark points, to obtain the P peak points and the Q trough points based on the depth distances of the N mark points comprised in the target cross section, the data processing device is configured to: divide the target cross section into M regions, wherein each of the M regions comprises a mark point corresponding to at least one positive electrode plate and a mark point corresponding to at least one negative electrode plate, respectively; and determine the peak point and the trough point in each of the M regions to obtain the P peak points and the Q trough points based on the depth distances of the mark points in each of the M regions. ### Claim 13 (depends on 11) The apparatus of claim 11, wherein after determining the peak points and the trough points among the N mark points, to obtain P peak points and Q trough points based on the depth distances of the N mark points comprised in the target cross section, the data processing device is further configured to: determine a target peak point and a target trough point whose depth distances meet a preset depth condition among the P peak points and the Q trough points, and wherein in determining the alignment detection result of the battery electrode plates based on the position information of the P peak points and the Q trough points, the data processing device is configured to: determine the alignment detection result of the battery electrode plates based on position information of the target peak point and the target trough point. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein in determining the target peak point and the target trough point whose depth distances meet the preset depth condition among the P peak points and the Q trough points, the data processing device is configured to: determine the target peak point among the P peak points, the depth distance of the target peak point being in a first depth distance interval; and determine the target trough point among the Q trough points, the depth distance of the target trough point being in a second depth distance interval, a minimum value of the second depth distance interval being greater than a maximum value of the first depth distance interval. ### Claim 15 (depends on 11) The apparatus of claim 11, wherein in determining the alignment detection result of the battery electrode plates based on the position information of the P peak points and the Q trough points, the data processing device is configured to: determine whether the P peak points and the Q trough points are arranged according to a preset rule based on the position information of the P peak points and the Q trough points; and determine that the alignment detection result of the battery electrode plates is qualified under a condition that the P peak points and the Q trough points are arranged according to the preset rule. ### Claim 16 (depends on 15) The apparatus of claim 15, wherein in determining that the alignment detection result of the battery electrode plates is qualified under the condition that the P peak points and the Q trough points are arranged according to the preset rule, the data processing device is configured to: under the condition that the P peak points and the Q trough points are arranged according to the preset rule, determine whether the P peak points and the Q trough points meet a preset offset condition based on the depth distances of the P peak points and the Q trough points; and under a condition that the P peak points and the Q trough points meet the preset offset condition, determine that the alignment detection result of the battery electrode plates is qualified. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein under the condition that the P peak points and the Q trough points are arranged according to the preset rule, in determining whether the P peak points and the Q trough points meet the preset offset condition based on the depth distances of the P peak points and the Q trough points, the data processing device is configured to: under the condition that the P peak points and the Q trough points are arranged according to the preset rule, obtain an offset amount of the depth distances between the mark point corresponding to an i-th electrode plate and the mark point corresponding to a (i+1)th electrode plate, wherein i is a positive integer; and under a condition that the offset amount is in a preset offset interval, determine that the P peaks points and the Q trough points meet the preset offset condition. ### Claim 18 (depends on 15) The apparatus of claim 15, wherein before determining the alignment detection result of the battery electrode plates based on the position information of the P peak points and the Q trough points, the data processing device is further configured to: obtain a peak line by fitting based on the position information of the P peak points; and calculate an inclination amount of the battery electrode plates based on the peak line; and wherein under the condition that the P peak points and the Q trough points are arranged according to the preset rule, in determining that the alignment detection result of the battery electrode plates is qualified, the data processing device is configured to: under a condition that the inclination amount is less than or equal to a preset threshold, and the P peak points and the Q trough points are arranged according to the preset rule, determine that the alignment detection result of the battery electrode plates is qualified. ### Claim 19 (depends on 11) The apparatus of claim 11, wherein in obtaining the depth distances of the target cross section of the battery electrode plates, the light sensing device is configured to: under a condition that lamination completion information of the battery electrode plates is received, control a photographing device to move along a first direction, and taking an image of the battery electrode plates, the first direction being parallel to the electrode plate setting direction of the battery electrode plates; and determine the depth distance of the target cross section of the battery electrode plates based on the image. ### Claim 20 (depends on 11) The apparatus according to claim 11, wherein the light sensing device comprises a photo sensor or a photographing device; the data processing device comprises a processor and a memory coupled with the processor; and the memory is configured to store program instructions for execution by the processor.