# US 2025/0095140 A1 · Liquid leakage detection method, apparatus, and device, and computer-readable storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0095140 A1 - Document ID: US20250095140A1 - Status: Published application - Kind: A1 - Application number: 18/964,272 - Filed: 2024-11-29 - Published: 2025-03-20 - Earliest claimed: 2022-12-06 - Assignees: Contemporary Amperex Technology (Hong Kong) Limited - Applicants: Contemporary Amperex Technology (Hong Kong) Limited - Inventors: Zhongbao HUANG; Zhongyang WANG; Xinghua WANG - Web page: https://patentgrep.com/patent/US20250095140A1 ## CPC - G06T 7/001: {using an image reference approach} - G06T 7/0006: {using a design-rule based approach} - G06T 7/62: of area, perimeter, diameter or volume - G06T 7/74: {involving reference images or patches} - G06V 10/28: Quantising the image, e.g. histogram thresholding for discrimination between background and foreground patterns - H01M 10/4228: {Leak testing of cells or batteries} - G06T 2207/30164: Workpiece; Machine component - Y02E 60/10: Energy storage using batteries - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING - 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 liquid leakage detection method comprises: acquiring an image to be processed of a battery; recognizing the image to be processed to obtain an adapter piece image and a top cover image; and determining whether there is liquid leakage in the battery according to the adapter piece image and the top cover image. ## Claims ### Claim 1 A liquid leakage detection method, comprising: acquiring a target image of a battery; recognizing the target image to obtain an adapter piece image and a top cover image; and determining whether there is liquid leakage in the battery according to the adapter piece image and the top cover image. ### Claim 2 (depends on 1) The liquid leakage detection method of claim 1, wherein recognizing the target image to obtain the adapter piece image and the top cover image comprises: performing grayscale processing on the target image to obtain a grayscale image; and obtaining the adapter piece image and the top cover image according to a grayscale difference between an adapter piece and a top cover in the grayscale image. ### Claim 3 (depends on 2) The liquid leakage detection method of claim 2, wherein: the adapter piece comprises a piece body and a protrusion provided on the piece body, and the adapter piece image comprises a piece body image and a protrusion image; and obtaining the adapter piece image and the top cover image according to a grayscale difference between the adapter piece and the top cover in the grayscale image comprises: obtaining the piece body image, the protrusion image and the top cover image according to grayscale differences between the piece body, the protrusion and the top cover in the grayscale image. ### Claim 4 (depends on 1) The liquid leakage detection method of claim 1, wherein determining whether there is liquid leakage in the battery according to the adapter piece image and the top cover image comprises: obtaining a positional offset between the adapter piece and the top cover according to the adapter piece image and the top cover image; and determining whether there is liquid leakage in the battery according to the positional offset. ### Claim 5 (depends on 4) The liquid leakage detection method of claim 4, wherein obtaining the positional offset between the adapter piece and the top cover according to the adapter piece image and the top cover image comprises: determining a detection region for an adapter piece in the adapter piece image and a detection region for a top cover in the top cover image according to the adapter piece image and the top cover image; and acquiring a positional offset between the detection region for the adapter piece in the adapter piece image and the detection region for the top cover in the top cover image to obtain a positional offset between the adapter piece and the top cover. ### Claim 6 (depends on 5) The liquid leakage detection method of claim 5, wherein: the detection region for the adapter piece comprises a center of the protrusion of the adapter piece, and the detection region for the top cover in the top cover image comprises a center of a terminal post hole of the top cover; and determining the detection region for an adapter piece in the adapter piece image and the detection region for the top cover in the top cover image according to the adapter piece image and the top cover image comprises: determining an outline of the adapter piece in the adapter piece image and an outline of the top cover in the top cover image according to the adapter piece image and the top cover image; determining the center of the protrusion in the adapter piece image according to the outline of the adapter piece in the adapter piece image; determining a middle line and an identification region for the top cover in the top cover image according to the outline of the top cover in the top cover image; and determining the center of the terminal post hole of the top cover in the top cover image according to the middle line of the top cover in the top cover image and a relative positional relationship between the center of the terminal post hole of the top cover and the identification region. ### Claim 7 (depends on 6) The liquid leakage detection method of claim 6, wherein acquiring the positional offset between the detection region for the adapter piece in the adapter piece image and the detection region for the top cover in the top cover image to obtain a positional offset between the adapter piece and the top cover comprises: acquiring a distance between the center of the protrusion in the adapter piece image and the center of the terminal post hole in the top cover image to obtain a positional offset between the adapter piece and the top cover. ### Claim 8 (depends on 7) The liquid leakage detection method of claim 7, wherein determining whether there is liquid leakage in the battery according to the positional offset comprises: obtaining a first value of distance between the protrusion and the top cover according to an outer diameter design value of a protrusion opening of the adapter piece and an outer diameter design value of the terminal post hole; obtaining a second value of distance between the protrusion and the top cover according to a lower plastic thickness design value of the top cover and a protrusion draft angle design value; determining a preset specification value according to the first value of distance and the second value of distance; and determining that there is liquid leakage in the battery if the positional offset does not match the preset specification value. ### Claim 9 (depends on 7) The liquid leakage detection method of claim 7, wherein determining whether there is liquid leakage in the battery according to the positional offset comprises: obtaining a first value of distance between the protrusion and the top cover according to an inner diameter design value of a protrusion bottom of the adapter piece and an outer diameter design value of the terminal post hole; obtaining a second value of distance between the protrusion and the top cover according to a lower plastic thickness design value of the top cover and a protrusion draft angle design value; determining a preset specification value according to the first value of distance and the second value of distance; and determining that there is liquid leakage in the battery if the positional offset does not match the preset specification value. ### Claim 10 (depends on 6) The liquid leakage detection method of claim 6, wherein acquiring the positional offset between the detection region for the adapter piece in the adapter piece image and the detection region for the top cover in the top cover image to obtain the positional offset between the adapter piece and the top cover comprises: acquiring a horizontal coordinate difference and a vertical coordinate difference between the center of the protrusion in the adapter piece image and the center of the terminal post hole in the top cover image to obtain the positional offset between the adapter piece and the top cover. ### Claim 11 (depends on 10) The liquid leakage detection method of claim 10, wherein determining whether there is liquid leakage in the battery according to the positional offset comprises: acquiring design values of the horizontal coordinate difference and the vertical coordinate difference between the center of the protrusion and the center of the terminal post hole to obtain a preset specification value; and determining that there is liquid leakage in the battery if the positional offset does not match the preset specification value. ### Claim 12 (depends on 5) The liquid leakage detection method of claim 5, wherein: acquiring the target image of the battery comprise acquiring the target image of the battery by a camera; and acquiring the positional offset between the detection region for the adapter piece in the adapter piece image and the detection region for the top cover in the top cover image to obtain the positional offset between the adapter piece and the top cover comprises: obtaining a positional offset between the adapter piece and the top cover in a world coordinate system according to positions of the detection region for the adapter piece in the adapter piece image and the detection region for the top cover in the top cover image in a camera coordinate system and a predetermined relative positional relationship of the same site in the camera coordinate system and the world coordinate system. ### Claim 13 (depends on 12) The liquid leakage detection method of claim 12, further comprising, before acquiring the target image of the battery by the camera: acquiring an image of a calibration plate at a preset position by the camera; and determining the relative positional relationship of the same site in the camera coordinate system and the world coordinate system according to positions of the same site in the image of the calibration plate and in the calibration plate. ### Claim 14 (depends on 4) The liquid leakage detection method of claim 4, further comprising: obtaining and outputting, if there is no liquid leakage in the battery, a liquid leakage risk assessment result of the battery according to the positional offset. ### Claim 15 (depends on 14) The liquid leakage detection method of claim 14, wherein obtaining and outputting, if there is no liquid leakage in the battery, the liquid leakage risk assessment result of the battery according to the positional offset comprises: acquiring, if there is no liquid leakage in the battery, a difference between the positional offset and a preset specification value; and determining, according to the difference, a liquid leakage risk level of the battery and outputting the liquid leakage risk assessment result characterizing the liquid leakage risk level, wherein the difference is positively correlated with the liquid leakage risk level. ### Claim 16 (depends on 1) A liquid leakage detection device, comprising: a memory storing a computer program; and a processor configured to execute the computer program to implement the liquid leakage detection method of claim 1. ### Claim 17 (depends on 1) A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, causes the processor to implement the liquid leakage detection method of claim 1. ### Claim 18 A liquid leakage detection apparatus, comprising: an image acquisition unit for acquiring a target image of a battery; an image recognition unit for recognizing the target image to obtain an adapter piece image and a top cover image; and a liquid leakage detection unit for determining whether there is liquid leakage in the battery according to the adapter piece image and the top cover image.