WO2023133836A1 - 极片表面贴胶检测方法、装置、设备及极片贴胶机 - Google Patents

极片表面贴胶检测方法、装置、设备及极片贴胶机 Download PDF

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Publication number
WO2023133836A1
WO2023133836A1 PCT/CN2022/072117 CN2022072117W WO2023133836A1 WO 2023133836 A1 WO2023133836 A1 WO 2023133836A1 CN 2022072117 W CN2022072117 W CN 2022072117W WO 2023133836 A1 WO2023133836 A1 WO 2023133836A1
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WIPO (PCT)
Prior art keywords
color
surface image
adhesive paper
tab
preset value
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PCT/CN2022/072117
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English (en)
French (fr)
Inventor
李晨峰
黄靖华
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宁德时代新能源科技股份有限公司
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Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to EP22919486.5A priority Critical patent/EP4358207A1/en
Priority to CN202280019640.XA priority patent/CN117178399A/zh
Priority to PCT/CN2022/072117 priority patent/WO2023133836A1/zh
Priority to KR1020247004341A priority patent/KR20240032094A/ko
Publication of WO2023133836A1 publication Critical patent/WO2023133836A1/zh
Priority to US18/410,358 priority patent/US20240153067A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G06T7/0004—Industrial image inspection
    • G06T7/0008—Industrial image inspection checking presence/absence
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0481—Compression means other than compression means for stacks of electrodes and separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10024—Color image
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4285—Testing apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the technical field of batteries, in particular to a method, device, equipment and a pole piece glue-gluing detection method on the surface of pole pieces.
  • batteries are mainly used as power in electric vehicles.
  • the batteries have the characteristics of high capacity, high output voltage, and good charge-discharge cycle performance.
  • it is generally necessary to wind the anode pole piece, the cathode pole piece, and the diaphragm into a core.
  • the present application provides a pole piece surface glue detection method, device, equipment and pole piece glue machine, which can accurately detect whether the glue paper set on the pole piece surface is pasted to increase the safety of the battery.
  • the present application provides a method for detecting glue on the surface of a pole piece.
  • the pole piece has a first surface and a second surface, and a first adhesive paper and a second adhesive paper are respectively pasted on the first surface and the second surface.
  • the detection method includes: acquiring a first surface image and a second surface image, wherein the first surface image includes an image of the first adhesive paper, the second surface image includes an image of the second adhesive paper, and the first surface image is far away from the tab.
  • the color distance between the background color of the side and the color of the first adhesive paper is greater than or equal to the first preset value, and the color distance between the background color of the side away from the ear and the color of the second adhesive paper in the second surface image is greater than Or equal to the second preset value, according to the first surface image and the second surface image, determine whether the pasting of the first adhesive paper and the second adhesive paper is qualified.
  • the second surface The color distance between the background color of the image away from the ear side and the color of the second adhesive paper is greater than or equal to the second preset value, so that the first adhesive paper and the second adhesive paper are significantly different from the corresponding background colors, thereby , the shape of the first adhesive paper and the position relative to the pole piece can be recognized according to the first surface image detection, and the shape of the second adhesive paper and the position relative to the pole piece can be recognized according to the second surface image detection, so that the first surface image can be accurately judged Whether the first adhesive tape and the second adhesive tape are pasted up to standard, thereby increasing the safety of the battery.
  • the color distance between the color of the first adhesive paper and the color of the second adhesive paper is greater than or equal to a third preset value.
  • the color of the first adhesive paper and the color of the second adhesive paper are limited.
  • the degree of distinction between the colors so that the outcrop boundary of the first adhesive paper can be clearly determined from the first surface image, and the outcrop boundary of the second adhesive paper can be clearly determined from the second surface image, which is conducive to improving the adhesion detection accuracy.
  • the first preset value is greater than the third preset value
  • the second preset value is greater than the third preset value
  • the first adhesive paper by setting the size relationship of the three grayscale thresholds of the first preset value, the second preset value and the third preset value, it is easy for the first adhesive paper to be extracted from the first surface image.
  • the recognition and detection in the background and the second adhesive tape are easy to recognize and detect from the background of the second surface image, which is beneficial to improving the accuracy of the adhesive tape detection.
  • the background color of the side away from the tab in the first surface image is white, and/or, the background color of the side away from the tab in the second surface image is white.
  • the first surface image can be clearly set off.
  • the adhesive tape and the second adhesive tape are clearly distinguished from the background, so that the first adhesive tape and the second adhesive tape can be clearly identified and detected, which is beneficial to improving the accuracy of pasting qualified inspection of the adhesive tape.
  • the aforementioned "according to the first surface image and the second surface image, determine whether the first adhesive tape and the second adhesive tape are qualified for pasting" includes: according to the first surface image, obtaining the second A first distance vector from the first end of the adhesive paper away from the tab to the coating boundary on the pole piece away from the tab; according to the second surface image, obtain the first end of the second adhesive paper away from the tab to the coating on the pole piece away from the tab The second distance vector of the layer boundary; according to the first distance vector and the second distance vector, it is determined whether the pasting of the first adhesive paper and the second adhesive paper is qualified.
  • the first distance vector and the second distance vector are obtained by identifying and detecting the first surface image and the second surface image, and then based on the magnitude and direction of the first distance vector and the second distance vector , can accurately determine whether the first glued paper and the second glued paper are pasted up to standard.
  • the aforementioned "according to the first distance vector and the second distance vector, determine whether the first adhesive tape and the second adhesive tape are qualified for pasting" includes: taking the direction toward the tab as positive direction, if the first distance vector is greater than 0 and the second distance vector is greater than 0, it is determined that the pasting of the first adhesive tape and the second adhesive tape is qualified.
  • the aforementioned "according to the first distance vector and the second distance vector, determine whether the first adhesive tape and the second adhesive tape are qualified for pasting" includes:
  • an insulating coating is provided between the coating boundary near the tab on the pole piece and the tab, and the color distance between the color of the insulating coating and the color of the first adhesive paper is greater than or equal to the fourth preset value, the distance between the color of the insulating coating and the color of the second adhesive paper is greater than or equal to the fifth preset value, the distance between the background color near the ear side in the first surface image and the color of the insulating coating The color distance is greater than or equal to the sixth preset value, and the color distance between the background color near the ear and the color of the insulating coating in the second surface image is greater than or equal to the sixth preset value.
  • the aforementioned "according to the first surface image and the second surface image, determine whether the first adhesive paper and the second adhesive paper are qualified for pasting” also includes: according to the first surface image, determine whether the second end of the first adhesive paper near the tab is Between the boundary of the insulating coating close to the tab and the boundary of the insulating coating away from the tab; according to the second surface image, determine whether the second end of the second adhesive tape close to the tab is between the boundary of the insulating coating close to the tab and Between the boundary of the insulating coating away from the tab; if the second end of the first adhesive paper close to the tab is between the boundary of the insulating coating close to the tab and the boundary of the insulating coating away from the tab, the second adhesive paper close to the pole If the second end of the ear is between the boundary of the insulating coating close to the tab and the boundary of the insulating coating away from the tab, it is determined that the pasting of the first adhesive paper and the second adhesive paper is qualified.
  • the color distance between the color of the insulating coating and the color of the first adhesive paper is greater than or equal to the fourth preset value, so that the color of the first adhesive paper and the color of the insulating coating
  • the difference between the colors is obvious, and it is easy to distinguish between the first adhesive tape and the insulating coating during image detection;
  • the color distance between the color of the insulating coating and the second adhesive tape is greater than or equal to the fifth preset value, so that the second adhesive tape
  • the difference between the color of the adhesive tape and the color of the insulating coating is obvious, and it is easy to identify and distinguish the second gummed paper and the insulating coating during image detection.
  • the side near the tab in the second surface image The color distance between the background color and the color of the insulating coating is set to be greater than or equal to a sixth preset value, so that the insulating coatings on the first surface and the second surface are clearly colored in the first surface image and the second surface image respectively , thus, when the first surface image is recognized and detected, the two boundaries of the insulating coating can be grasped more accurately, and when the second surface image is recognized and detected, the two boundaries of the insulating coating can be grasped more accurately. boundaries. From the above two aspects, the accuracy of gummed paper adhesion detection can be effectively improved.
  • the sixth preset value is greater than the fourth preset value, and/or, the sixth preset value is greater than the fifth preset value.
  • the insulating coating is easy to be removed from the background of the first surface image.
  • the recognition and detection in the center and the recognition and detection from the background of the second surface image are beneficial to improving the accuracy of adhesive paper detection.
  • the background color of the side near the ear in the first surface image is black, and/or, the background color of the side near the ear in the second surface image is black.
  • the present application provides a pole piece surface glue detection device, including an image acquisition module and a pasting qualification determination module.
  • the image acquisition module is used to acquire the first surface image and the second surface image, wherein the first surface image includes the image of the first adhesive paper, the second surface image includes the image of the second adhesive paper, and the first surface image is far away from
  • the color distance between the background color on the tab side and the color of the first adhesive paper is greater than or equal to the first preset value, and the color distance between the background color on the side away from the tab side and the color of the second adhesive paper in the second surface image The distance is greater than or equal to the second preset value.
  • the pasting qualification determination module is used to determine whether the pasting of the first adhesive paper and the second adhesive paper is qualified according to the first surface image and the second surface image.
  • the second surface The color distance between the background color of the image away from the ear side and the color of the second adhesive paper is greater than or equal to the second preset value, so that the first adhesive paper and the second adhesive paper are significantly different from the corresponding background colors, thereby , the shape of the first adhesive paper and the position relative to the pole piece can be recognized according to the first surface image detection, and the shape of the second adhesive paper and the position relative to the pole piece can be recognized according to the second surface image detection, so that the first surface image can be accurately judged Whether the first adhesive tape and the second adhesive tape are pasted up to standard, thereby increasing the safety of the battery.
  • the present application provides a pole piece glue detection device, the pole piece has a first surface and a second surface, the first surface and the second surface at the preset position of the pole piece are respectively pasted with the first glue paper and second gummed paper.
  • the pole piece glue detection equipment includes a first image acquisition device, a second image acquisition device, a processor and a memory.
  • the first image acquisition device is used to acquire the first surface image
  • the first surface image includes the image of the first adhesive paper, the color between the background color on the side away from the ear and the color of the first adhesive paper in the first surface image
  • the distance is greater than or equal to the first preset value.
  • the second image acquisition device is used to collect the second surface image, the second surface image includes the image of the second adhesive paper, and the color distance between the background color of the side away from the ear side and the color of the second adhesive paper in the second surface image is greater than or equal to the second preset value.
  • the processor is respectively connected in communication with the first image acquisition device and the second image acquisition device to acquire the first surface image and the second surface image.
  • the memory is connected in communication with the processor, the memory stores instructions executable by the processor, and the instructions are executed by the processor, so that the processor can execute the method in the first aspect.
  • the pole piece glue detection device can accurately detect whether the glue paper set on the surface of the pole piece is qualified.
  • the present application provides a pole piece gluing machine, including the pole piece gluing detection device as described in the third aspect.
  • the pole piece gluing machine has an accurate adhesive tape detection function, which is beneficial to ensure that the pole piece gluing is qualified.
  • Fig. 1 is the schematic diagram of winding core in some embodiments of the present application.
  • Fig. 2 is a schematic diagram of pole piece adhesive paper in some embodiments of the present application.
  • Fig. 3 is a schematic flow chart of a method for detecting glue on the surface of a pole piece in some embodiments of the present application
  • Figure 4(a) is a schematic diagram of shooting the first surface image in some embodiments of the present application.
  • Fig. 4(b) is a schematic diagram of shooting the second surface image in some embodiments of the present application.
  • FIG. 5 is a schematic diagram of a color space in some embodiments of the present application.
  • Fig. 6 is a schematic diagram of a sub-flow process of step S20 in the method shown in Fig. 3;
  • Fig. 7 is a schematic diagram of a first distance vector X and a second distance vector Y in some embodiments of the present application;
  • FIG. 8 is a schematic diagram of another sub-flow of step S20 in the method shown in FIG. 3;
  • FIG. 9 is a schematic structural diagram of a pole piece surface glue detection device 300 in some embodiments of the present application.
  • Fig. 10 is a schematic structural diagram of a pole piece glue detection device 400 in some embodiments of the present application.
  • multiple refers to more than two (including two), similarly, “multiple groups” refers to more than two groups (including two), and “multiple pieces” refers to More than two pieces (including two pieces).
  • a glue-applying process is introduced between the die-cutting and slitting process of the pole piece and the winding process, so that the glue paper is pasted on the corresponding places at the two corners of the innermost circle of the pole piece. It can effectively prevent lithium precipitation.
  • Figure 2 a glue-applying process is introduced between the die-cutting and slitting process of the pole piece and the winding process, so that the glue paper is pasted on the corresponding places at the two corners of the innermost circle of the pole piece. It can effectively prevent lithium precipitation.
  • Figure 2 please refer to Figure 2.
  • the first tab of the pole piece as a reference (when the pole piece is wound, the first tab is first rolled into the core ), locate the centerline position L1 of the first pair of adhesive tapes at a preset distance (for example, 51 ⁇ 2mm) from the first tab, and then the glue applicator pastes the first glue on the AB surface of the pole piece L1 Paper and the second adhesive paper; locate the centerline position L2 of the second pair of adhesives at another preset distance (for example, 250 ⁇ 2mm) from the first tab, then the gluer will be on the AB surface of the pole piece L2 Paste the first adhesive tape and the second adhesive tape respectively.
  • the AB planes here refer to the two surfaces of the pole piece respectively.
  • the state after glue application is: on the side close to the tab, the ends of the first adhesive tape and the second adhesive tape are between the two boundaries of the insulating coating, On the side away from the pole ear, the ends of the first adhesive paper and the second adhesive paper exceed the boundary of the pole piece by a certain length, for example, 2-3mm beyond the boundary of the pole piece. It can be understood that the specific length of the excess can be set according to the actual situation.
  • the ends of the first adhesive paper and the second adhesive paper can be "bonded", that is, they are put together and the ends overlap, so that the first adhesive paper and the second adhesive paper
  • the adhesive paper is not easy to fall off during the subsequent winding and passing of the pole piece, and can effectively prevent lithium deposition at the corners of the inner circle of the pole piece (ie, L1 and L2).
  • the adhesive tape After pasting the adhesive tape, it is first necessary to inspect the adhesive tape to determine whether the adhesive tape pasted on the surface of the pole piece is qualified. Generally, the pole piece is photographed by a camera, and then the captured image is processed to complete the qualified inspection of the adhesive tape, and the unqualified adhesive tape obtained from the detection is marked. However, the detection result is inaccurate because the adhesive tape is not easy to identify and distinguish during detection, that is, it is impossible to perform fool-proof monitoring on the peeling off of the adhesive tape.
  • the inventors of the present application have found through research that the color of the adhesive tape and the background color can be set so that the difference between the color of the adhesive tape and the background color is relatively large, so that it is easy to identify and distinguish the adhesive tape during image detection and recognition, so , can accurately detect whether the adhesive tape set on the surface of the pole piece is pasted up to standard, so as to increase the safety of the battery.
  • the pole piece has a first surface and a second surface, and a first adhesive paper and a second adhesive paper are pasted on the first surface and the second surface respectively.
  • a first surface image and a second surface image are acquired, wherein the first surface image includes an image of a first adhesive paper, and the second surface image includes an image of a second adhesive paper.
  • the color distance between the background color of the side away from the tab side in the first surface image and the color of the first adhesive paper is greater than or equal to the first preset value, and the background color of the side away from the tab side in the second surface image is different from the second color.
  • the color distance between the colors of the adhesive tape is greater than or equal to the second preset value.
  • the first surface image and the second surface image it is determined whether the pasting of the first adhesive paper and the second adhesive paper is qualified.
  • the color distance between the background color of the side away from the pole ear in the first surface image and the color of the first adhesive paper is set to be greater than or equal to the first preset value.
  • the color distance between the background color of the ear side and the color of the second adhesive paper is greater than or equal to the second preset value, so that the first adhesive paper and the second adhesive paper are respectively significantly different from the corresponding background colors, thus, according to the first
  • the first surface detection recognizes the shape of the first adhesive tape and the position relative to the pole piece, and the shape of the second adhesive paper and the position relative to the pole piece are recognized according to the second surface image detection, so that the first adhesive paper and the second adhesive tape can be accurately judged 2. Whether the adhesive tape is pasted up to standard, thereby increasing the safety of the battery.
  • the method provided in the embodiment of the present application relates to a method for detecting glue on the pole piece surface
  • the method can be applied to a pole piece glue detection device.
  • the pole piece gluing detection equipment can be applied to the pole piece gluing machine to provide the gluing detection function for the pole piece gluing machine. Therefore, the pole piece gluing machine includes pole piece gluing detection equipment.
  • FIG. 3 is a schematic flow diagram of a method for detecting glue on the surface of a pole piece provided by an embodiment of the present application.
  • the method S200 may specifically include the following steps:
  • S10 Acquiring a first surface image and a second surface image.
  • the pole piece has a first surface and a second surface.
  • the pole piece here can be a cathode pole piece or an anode pole piece.
  • the pole piece here is an anode pole piece during detection, therefore, the pole piece can be a cathode pole piece or an anode pole piece according to the actual situation, and there is no limitation here.
  • the pole piece is in the shape of a sheet, and the first surface and the second surface are the front and back sides of the pole piece, also called the AB surface. If the surface facing the central axis in the core is the front (or A side), and the surface away from the central axis is the back side (or B side), then when the first surface is the front side (or A side), the second surface is the back side (or B side), when the first surface is the reverse side (or B side), the second surface is the front side (or A side).
  • a first adhesive tape and a second adhesive tape are pasted on the first surface and the second surface respectively.
  • the first adhesive tape is pasted on the L1 and L2 of the first surface of the pole piece
  • the second adhesive tape is pasted on the L1 and L2 of the second surface of the pole piece.
  • the centerlines of the first adhesive paper and the second adhesive paper are approximately coincident with L1 or L2, thus, the projections of the first adhesive paper and the second adhesive paper in the direction perpendicular to the pole piece are also approximately coincident.
  • the first adhesive paper and the second adhesive paper both exceed the boundary of the pole piece away from the tab side, that is, both the first adhesive paper and the second adhesive paper have outcrops, and the outcrops are bonded together under electrostatic action.
  • the first surface image includes the image of the first adhesive paper
  • the second surface image includes the image of the second adhesive paper.
  • camera 1# can obtain the first surface image by shooting against the first surface, so that the first surface image includes the first adhesive tape
  • camera 2# faces the second surface
  • the photographing can obtain a second surface image, so that the second surface image includes the second adhesive tape.
  • the color distance between the background color on the side away from the ear and the color of the first adhesive paper in the first surface image is greater than or equal to a first preset value.
  • a background can be arranged under the pole piece, for example, the background can be a transmission platform, a roller, or a set background plate. Set the background color away from the pole ear side (i.e. the background color below the outcrop of the first adhesive paper) and the color of the first adhesive paper as two colors with large differences.
  • the color distance between the background color of the first surface image away from the ear side and the color of the first adhesive paper is greater than or equal to the first preset value, so that the difference between the color of the first adhesive paper and the background color below it Obviously, it is easy to identify and distinguish the first adhesive paper during image detection.
  • the color distance between the background color on the side away from the ear and the color of the second adhesive paper is greater than or equal to a second preset value.
  • a background can be arranged under the pole piece, for example, the background can be a transmission platform, a roller, or a set background plate. Set the background color away from the pole ear side (that is, the background color under the outcrop of the second adhesive paper) and the color of the second adhesive paper to two colors with a large difference.
  • the background color away from the pole ear side that is, the background color under the outcrop of the second adhesive paper
  • the color of the second adhesive paper to two colors with a large difference.
  • the color distance between the background color on the side away from the pole ear and the color of the second adhesive paper is greater than or equal to the second preset value, so that the difference between the color of the second adhesive paper and the background color below it is obvious , it is easy to identify and distinguish the second adhesive tape during image detection.
  • the first preset value and the second preset value are empirical values, which can be specifically set by those skilled in the art according to image detection requirements, without any limitation here.
  • the color space may be an RGB color space or a CMY color space, etc., without any limitation here.
  • the color distance is the distance between two colors in the color space.
  • the color distance may be calculated using three-channel grayscale values. Specifically, the color distance between color C1 and color C2 is calculated using the following formula;
  • ⁇ C 1 -C 2 ⁇ is the color distance between color C 1 and color C 2
  • C 1,R is the R channel gray value of color C 1
  • C 1,G is the G channel gray value of color C 1
  • B is the gray value of channel B of color C 1
  • C 2 R is the gray value of channel R of color C 2
  • C 2 G is the gray value of channel G of color C 2
  • C 2 B is the gray value of channel B of color C2 .
  • the gray value of a single channel can also be used to calculate the color distance, for example, the gray value of the R channel is used to calculate the color distance between color C1 and color C2 , the specific formula is as follows:
  • ⁇ C 1 -C 2 ⁇ is the color distance between color C 1 and color C 2
  • C 1,R is the R channel gray value of color C 1
  • C 2,R is the R channel gray value of color C 2 degree value.
  • S20 According to the first surface image and the second surface image, determine whether the pasting of the first adhesive paper and the second adhesive paper is qualified.
  • the existing image recognition algorithm or pixel can be used for the first surface image and the second surface image
  • the comparison algorithm obtains the shape and position of the first adhesive paper, and the shape and position of the second adhesive paper, thereby, by comparing the shapes and positions of the first adhesive paper and the second adhesive paper, determine the first adhesive paper and the second adhesive paper Whether the adhesive tape is pasted up to standard.
  • the distance in the second surface image is greater than or equal to the second preset value, so that the first adhesive paper and the second adhesive paper are significantly different from the corresponding background colors, thereby, according to The first surface image detection recognizes the shape of the first adhesive paper and the position relative to the pole piece, and the shape of the second adhesive paper and the position relative to the pole piece are recognized according to the second surface image detection, so that the first adhesive paper can be accurately judged And whether the adhesive tape of the second adhesive tape is pasted up to standard, thereby increasing the safety of the battery.
  • the color distance between the color of the first adhesive paper and the color of the second adhesive paper is greater than or equal to a third preset value.
  • the color of the first adhesive paper and the color of the second adhesive paper overlap.
  • the color of the first adhesive paper and the color of the second adhesive paper The color distance between the colors is set to be greater than or equal to a third preset value.
  • the third preset value is the set gray value threshold, which is used to define the degree of discrimination between the color of the first adhesive paper and the color of the second adhesive paper, which can be determined by those skilled in the art according to the actual situation. set up.
  • the first adhesive paper can be brown (the gray value of the R channel of brown is 80-90), the second adhesive paper can be blue (the gray value of the R channel of blue is 40-50),
  • the third preset value can be 20 or 30 and so on. Based on the high degree of discrimination between brown and blue, even if the first adhesive paper and the second adhesive paper overlap, the outcrop boundary of the first adhesive paper can be clearly determined from the first surface image, and the outcrop boundary of the first adhesive paper can be clearly determined from the second surface image. Two outcropping borders of gummed paper.
  • the outcrop boundary of the first adhesive paper can be clearly determined from the first surface image, and can be clearly determined from the second surface image.
  • the outcropping border of the second glued paper can be clearly determined from the first surface image, and can be clearly determined from the second surface image.
  • the difference between the color of the first gummed paper and the color of the second gummed paper is limited. Therefore, the outcropping boundary of the first adhesive paper can be clearly determined from the first surface image, and the outcropping boundary of the second adhesive paper can be clearly determined from the second surface image, which is conducive to improving the accuracy of adhesion detection.
  • the first preset value is greater than the third preset value
  • the second preset value is greater than the third preset value
  • the first preset value is used to define the degree of discrimination between the color of the first adhesive paper and the background color on the side away from the ear in the first surface image
  • the second preset value is used to define the degree of discrimination between the color of the second adhesive paper
  • the third preset value is used to define the degree of discrimination between the color of the first adhesive paper and the color of the second adhesive paper.
  • the first preset value is set to be greater than the third preset value, so that the color of the first adhesive paper and the background color of the first surface image away from the ear side
  • the degree of discrimination is higher than that between the color of the first adhesive paper and the color of the second adhesive paper, so that the first adhesive paper is easy to recognize and detect from the background of the first surface image
  • the second preset value is set to is greater than the third preset value, so that the distinction between the color of the second adhesive paper and the background color away from the ear side in the second surface image is higher than that between the color of the first adhesive paper and the color of the second adhesive paper
  • the degree of discrimination so that the second adhesive tape is easy to identify and detect from the background of the second surface image.
  • the background color of the side away from the tab in the first surface image is white, and/or, the background color of the side away from the tab in the second surface image is white.
  • rollers are set under the second surface of the pole piece, on the one hand, the pole piece can be transported, on the other hand, the roller can be used as Take the background of the first surface image.
  • the area where the edge of the pole piece away from the ear is projected on the roller is the background color of the side away from the ear in the first surface image, and the area where the edge of the pole piece away from the ear is projected on the roller is set to white.
  • a background plate is set under the second surface of the pole piece, and the area of the pole piece edge projected on the background plate away from the side of the pole ear is the first
  • the background color of the side away from the tab in the surface image, and the area of the edge of the tab away from the tab projected on the background plate is set to white.
  • the gray value based on white is around 255, which is clearly distinguished from the color of the pole piece (the pole piece is generally black), so that the edge of the pole piece can be clearly grasped.
  • white is also clearly distinguished from the color of the first adhesive tape, so that it can be clearly distinguished. Clearly identify the outcrop boundary where the first tape was detected.
  • rollers when taking the second surface image, based on the viewing angle of camera 2#, rollers are set under the first surface of the pole piece, on the one hand, the pole piece can be transported, on the other hand, the roller can As a background for taking the second surface image.
  • the area where the edge of the pole piece away from the ear is projected on the roller is the background color of the side away from the ear in the second surface image, and the area where the edge of the pole piece away from the ear is projected on the roller is set to white.
  • a background plate is set under the first surface of the pole piece, and the area projected on the background plate by the edge of the pole piece away from the ear side is the second
  • the background color of the side away from the tab in the surface image, and the area of the edge of the tab away from the tab projected on the background plate is set to white.
  • the grayscale value based on white is around 255, which is clearly distinguished from the color of the pole piece (the pole piece is generally black), so that the edge of the pole piece can be clearly grasped.
  • white is also clearly distinguished from the color of the second adhesive tape, so that it can be Clearly identify the outcrop boundary where the second adhesive tape was detected.
  • the first adhesive tape and the tab can be clearly set off.
  • the second adhesive tape is clearly distinguished from the background, so that the first adhesive tape and the second adhesive tape can be clearly identified and detected, which is beneficial to improving the accuracy of pasting qualified inspection of the adhesive tape.
  • step S20 specifically includes:
  • S23 According to the first distance vector and the second distance vector, determine whether the pasting of the first adhesive tape and the second adhesive tape is qualified.
  • the edge of the first adhesive paper can be obtained through the existing edge detection algorithm, so that the first end of the first adhesive paper far away from the tab can be obtained, that is, the first end of the first adhesive paper One piece of tape away from the end border of the tab.
  • the pole piece coating is coated on the first surface and the second surface of the pole piece, and the edge of the pole piece coating can be obtained through the existing edge detection algorithm, that is, grabbing the pole piece away from the pole piece coating border.
  • the distance from the first end of the first adhesive paper away from the tab to the coating boundary on the pole piece away from the tab can be converted The first distance vector X.
  • the edge of the second adhesive tape can be obtained through the existing edge detection algorithm, so that the first end of the second adhesive tape away from the tab can be obtained, that is, the first end of the second adhesive tape
  • the second adhesive tape is away from the end border of the tab.
  • the pole piece coating is coated on the first surface and the second surface of the pole piece, and the edge of the pole piece coating can be obtained through the existing edge detection algorithm, that is, grabbing the pole piece away from the pole piece coating border.
  • the distance from the first end of the second adhesive paper away from the tab to the coating boundary on the pole piece away from the tab can be converted The second distance vector Y.
  • first distance vector X and the second distance vector Y After obtaining the first distance vector X and the second distance vector Y, it can be determined whether the first adhesive paper and the second adhesive paper are pasted according to the magnitude and direction of the first distance vector X and the magnitude and direction of the second distance vector Y qualified. For example, if the first distance vector X and the second distance vector Y are both facing the direction of the tab, it means that the first end of the first adhesive paper away from the tab and the first end of the second adhesive paper away from the tab are both beyond the pole piece.
  • the coating boundary away from the lug that is, both the first adhesive paper and the second adhesive paper have outcrops, and the outcrops of the two can be combined together under the action of static electricity, so that it is not easy to fall off during the subsequent winding process.
  • the first distance vector and the second distance vector are obtained, and then based on the magnitude and direction of the first distance vector and the second distance vector, it is possible to accurately Determine whether the first adhesive tape and the second adhesive tape are pasted up to standard.
  • step S23 specifically includes:
  • the direction towards the tab is the positive direction, that is, the direction of the arrow e is the positive direction
  • the first distance vector is greater than 0 it means that the first distance vector is facing the positive direction
  • the first end of the first adhesive paper away from the tab exceeds the coating boundary on the pole piece away from the tab.
  • the second distance vector is greater than 0, it means that the second distance vector is facing the positive direction, and the first end of the second adhesive paper away from the tab exceeds the coating boundary on the pole piece away from the tab. That is, both the first adhesive paper and the second adhesive paper have outcrops, and the outcrops of the two can be combined together under the action of static electricity, so that they are not easy to fall off during the subsequent winding process.
  • step S23 specifically includes:
  • the absolute value of the difference between the first distance vector X and the second distance vector Y is
  • the preset range [0, N] is an empirical value set by those skilled in the art according to the outcropping of the adhesive tape, for example, N may be 3 mm.
  • an insulating coating is provided between the coating boundary near the tab on the pole piece and the tab. It is understood that the insulating coating is made of insulating material. The insulating coating prevents internal short circuits caused by adjacent pole piece coatings coming into contact with the pole piece foil.
  • the color distance between the color of the insulating coating and the color of the first adhesive paper is greater than or equal to a fourth preset value, and the color distance between the color of the insulating coating and the color of the second adhesive paper is greater than or equal to a fifth preset value.
  • the fourth preset value is a set gray threshold, which is used to define the degree of distinction between the color of the first adhesive tape and the color of the insulating coating.
  • the fifth preset value is a set gray threshold, which is used to define the degree of distinction between the color of the second gummed paper and the color of the insulating coating. It can be understood that the fourth preset value and the fifth preset value can be specifically set by those skilled in the art according to actual conditions, and in some embodiments, the fourth preset value can be the same or different.
  • the color distance between the color of the insulating coating and the color of the first adhesive paper is greater than or equal to a fourth preset value, so that the difference between the color of the first adhesive paper and the color of the insulating coating is obvious, It is easy to identify and distinguish the first adhesive tape and the insulating coating during image detection.
  • the distance between the color of the insulating coating and the color of the second adhesive paper is greater than or equal to the fifth preset value, so that the difference between the color of the second adhesive paper and the color of the insulating coating is obvious, and when the image is detected It is easy to identify and distinguish the second gummed paper and the insulating coating.
  • the color of the insulating coating can be white (with a gray value around 255), the first adhesive paper can be brown (the gray value of the brown R channel is 80-90), and the second adhesive paper can be Blue (the gray value of the R channel of blue is 40-50), the fourth preset value and the fifth preset value can be 100 or 150, etc. Based on the high degree of discrimination between brown and blue and white respectively, the first adhesive tape and the second adhesive tape on the insulating coating can be clearly detected.
  • the color distance between the background color on the side near the pole ear and the color of the insulating coating in the first surface image is greater than or equal to the sixth preset value, and in the second surface image near the pole A color distance between the background color of the ear and the color of the insulating coating is greater than or equal to a sixth preset value.
  • camera 1# can obtain the first surface image by shooting against the first surface, so that the first surface image includes the first adhesive tape, and camera 2# shoots against the second surface A second surface image can be obtained such that the second surface image includes a second adhesive.
  • the specific implementation of "the color distance between the background color near the ear side in the first surface image and the color of the insulating coating is greater than or equal to the sixth preset value" can be: when taking the first surface image, it can be A background is arranged under the pole piece, for example, the background can be a transmission table, a roller or a set background plate, etc. Set the background color near the ear side (that is, the background color under the insulating coating) and the color of the first adhesive paper to two colors whose color distance is greater than or equal to the sixth preset value.
  • the specific implementation of "the color distance between the background color near the pole ear and the color of the insulating coating in the second surface image is greater than or equal to the sixth preset value" can be: when taking the second surface image,
  • the background is arranged under the sheet, for example, the background can be a transmission table, a roller or a set background board, etc. Set the background color near the ear side (that is, the background color under the insulating coating) and the color of the second adhesive paper to two colors whose color distance is greater than or equal to the sixth preset value.
  • the two boundaries of the insulating coating can be grasped more accurately, and when the second surface image is recognized and detected, the two boundaries of the insulating coating can be grasped more accurately. boundary.
  • step S20 specifically also includes:
  • the existing image recognition algorithm or pixel comparison algorithm can be used for the first surface image to obtain the boundary and the boundary of the insulating coating near the tab.
  • the insulation coating is away from the border of the tab, and the first adhesive tape is obtained close to the second end of the tab. Therefore, through the positional relationship between the two boundaries of the insulating coating and the second end of the first adhesive paper, it can be determined whether the second end of the first adhesive paper close to the tab is in the same position as the boundary of the insulating coating near the tab and the insulating coating. between the layers away from the borders of the tabs.
  • the existing image recognition algorithm or pixel comparison algorithm can be used for the second surface image to obtain the boundary and the boundary of the insulating coating near the tab.
  • the insulating coating is away from the border of the tab, and the second adhesive tape is obtained close to the second end of the tab. Therefore, through the positional relationship between the two boundaries of the insulating coating and the second end of the second adhesive paper, it can be determined whether the second end of the second adhesive paper close to the tab is in the same position as the boundary of the insulating coating near the tab and the insulating coating. between the layers away from the borders of the tabs.
  • the color distance between the color of the insulating coating and the color of the first adhesive paper is greater than or equal to the fourth preset value, so that the color distance between the color of the first adhesive paper and the color of the insulating coating
  • the difference is obvious, and it is easy to identify and distinguish the first adhesive paper and the insulating coating during image detection;
  • the color distance between the color of the insulating coating and the second adhesive paper is greater than or equal to the fifth preset value, so that the color of the second adhesive paper and the insulating coating are greater than or equal to the fifth preset value.
  • the difference between the colors of the insulating coating is obvious, and it is easy to identify and distinguish the second gummed paper and the insulating coating during image detection.
  • the side near the tab in the second surface image The color distance between the background color and the color of the insulating coating is set to be greater than or equal to a sixth preset value, so that the insulating coatings on the first surface and the second surface are clearly colored in the first surface image and the second surface image respectively , thus, when the first surface image is recognized and detected, the two boundaries of the insulating coating can be grasped more accurately, and when the second surface image is recognized and detected, the two boundaries of the insulating coating can be grasped more accurately. boundaries. From the above two aspects, the accuracy of gummed paper adhesion detection can be effectively improved.
  • the sixth preset value is greater than the fourth preset value, and/or, the sixth preset value is greater than the fifth preset value.
  • the sixth preset value is used to define the degree of distinction between the background color near the tab side in the first surface image and the color of the insulating coating, and the background near the tab side in the second surface image The degree of discrimination between the color and the color of the insulating coating.
  • the fourth preset value is used to define the degree of distinction between the color of the first adhesive tape and the color of the insulating coating.
  • the fifth preset value is used to define the degree of discrimination between the color of the second gummed paper and the color of the insulating coating.
  • the sixth preset value is set to be greater than the fourth preset value, so that the background color near the ear side in the first surface image can be distinguished from the color of the insulating coating
  • the degree of discrimination is higher than that between the color of the first adhesive paper and the color of the insulating coating, so that when performing image detection on the first surface image, it is easier to accurately capture the two boundaries of the insulating coating, and the insulating coating
  • the two boundaries of the layer are used as a reference to determine the second end of the first adhesive tape, which is beneficial to improving the accuracy of adhesive tape detection.
  • the sixth preset value is set to be greater than the fifth preset value, so that the degree of discrimination between the background color near the ear side and the color of the insulating coating in the second surface image is higher than that of the second adhesive paper and the insulating coating.
  • the degree of discrimination between the colors of the layers so that when performing image detection on the second surface image, it is easier to accurately capture the two boundaries of the insulating coating, and determine the first adhesive paper with the two boundaries of the insulating coating as a reference
  • the second end is conducive to improving the accuracy of gummed paper detection.
  • the insulating coating is easy to identify and detect from the background of the first surface image And identifying and detecting from the background of the second surface image is beneficial to improving the accuracy of gummed paper detection.
  • the background color of the side near the ear in the first surface image is black
  • the background color of the side near the ear in the second surface image is black
  • rollers are set under the second surface of the pole piece, on the one hand, the pole piece can be transported, and on the other hand, the roller can be used as a background for taking the first surface image .
  • the area of the edge of the pole piece near the ear side projected on the roller is the background color of the side far away from the ear in the first surface image, and the area of the edge of the pole piece near the ear side projected on the roller is set to black.
  • a background plate is set under the second surface of the pole piece, and the area of the edge of the pole piece near the side of the pole projected on the background plate is the area near the side of the pole piece in the first surface image Set the background color of the pole piece edge near the pole side to black on the background plate.
  • the gray value based on black is around 0, which is clearly distinguished from the color of the insulating coating on the pole piece (the insulating coating is generally white), so that the two boundaries of the insulating coating can be clearly grasped.
  • a method for detecting glue on the surface of a pole piece is provided, and the pole piece to be tested has a first surface and a second surface.
  • a first adhesive tape and a second adhesive tape are pasted on the first surface and the second surface respectively, the first adhesive tape is brown, and the second adhesive tape is blue.
  • the color distance between brown and blue is greater than 40 (third preset value).
  • the pole piece surface glue detection method is applied between the die-cutting and stripping process and the winding process.
  • the method includes:
  • Both the first surface and the second surface of the pole piece are coated with a black electrochemical coating material, and a white insulating coating is arranged between the coating boundary near the tab and the tab.
  • the background is a black and white roller
  • one end of the black and white roller is black
  • the other end is white.
  • the pole piece is transported on the black and white roller
  • camera 1# captures the image of the pole segment on the black and white roller
  • the edge of the pole piece away from the ear side falls on the white area on the black and white roller
  • the edge of the pole piece near the ear side falls On the black area on the black and white roller.
  • the first end of the first adhesive paper and the first end of the second adhesive paper fall on the white area on the black and white roller, based on the color distance between white and brown is approximately 170 (greater than the first preset value), white and brown
  • the color distance of blue is approximately 200 (greater than the second preset value), so the first end of the brown first adhesive tape and the first end of the blue second adhesive tape are easy to distinguish and identify against a white background.
  • the second end of the first gummed paper and the second end of the second gummed paper land on the white insulating coating, and the white insulating coating lands on the black area on the black and white roller, based on the color distance between white and black is approximately 255 (greater than the sixth preset value), the color distance between white and brown is roughly 170 (greater than the fourth preset value), and the color distance between white and blue is roughly 200 (greater than the fifth preset value). Therefore, white The insulating coating is easy to distinguish and identify on a black background, and the second end of the first adhesive tape and the second end of the second adhesive paper are easy to distinguish and identify on a white background.
  • the distance in the second surface image is greater than or equal to the second preset value, so that the first adhesive paper and the second adhesive paper are significantly different from the corresponding background colors, thereby, according to The first surface image detection recognizes the shape of the first adhesive paper and the position relative to the pole piece, and the shape of the second adhesive paper and the position relative to the pole piece are recognized according to the second surface image detection, so that the first adhesive paper can be accurately judged And whether the adhesive tape of the second adhesive tape is pasted up to standard, thereby increasing the safety of the battery.
  • the color distance between the color of the insulating coating and the color of the first adhesive paper is greater than or equal to the fourth preset value, so that the difference between the color of the first adhesive paper and the color of the insulating coating is obvious. It is easy to identify and distinguish the first adhesive paper and the insulating coating; the color distance between the color of the insulating coating and the second adhesive paper is greater than or equal to the fifth preset value, so that the distance between the color of the second adhesive paper and the color of the insulating coating The difference is obvious, and it is easy to distinguish between the second gummed paper and the insulating coating during image detection.
  • the background color near the tab side in the second surface image is set to be greater than or equal to the sixth preset value, so that the insulating coatings on the first surface and the second surface are clearly colored in the first surface image and the second surface image, thereby , when the first surface image is recognized and detected, the two boundaries of the insulating coating can be grasped more accurately, and when the second surface image is recognized and detected, the two boundaries of the insulating coating can be grasped more accurately . From the above three aspects, the accuracy of glued paper adhesion detection can be effectively improved.
  • the present application also provides a pole piece surface adhesive detection device 300 , including an image acquisition module 301 and a pasting qualification determination module 302 .
  • the image acquiring module 301 is used to acquire a first surface image and a second surface image, wherein the first surface image includes the image of the first adhesive paper, the second surface image includes the image of the second adhesive paper, and the first surface image is far away from the pole.
  • the color distance between the background color on the ear side and the color of the first adhesive paper is greater than or equal to the first preset value, and the color distance between the background color on the side away from the ear side and the color of the second adhesive paper in the second surface image greater than or equal to the second preset value.
  • the pasting qualification determination module is used to determine whether the pasting of the first adhesive paper and the second adhesive paper is qualified according to the first surface image and the second surface image.
  • the distance in the second surface image is greater than or equal to the second preset value, so that the first adhesive paper and the second adhesive paper are significantly different from the corresponding background colors, thereby, according to The first surface image detection recognizes the shape of the first adhesive paper and the position relative to the pole piece, and the shape of the second adhesive paper and the position relative to the pole piece are recognized according to the second surface image detection, so that the first adhesive paper can be accurately judged And whether the adhesive tape of the second adhesive tape is pasted up to standard, thereby increasing the safety of the battery.
  • the present application also provides a pole piece glue detection device 400, the pole piece has a first surface and a second surface, and the first surface at the preset position of the pole piece The surface and the second surface are respectively pasted with a first adhesive tape and a second adhesive tape.
  • the pole piece glue detection device 400 includes a first image acquisition device 401 , a second image acquisition device 402 , a processor 403 and a memory 404 .
  • the first image acquisition device 401 is used to acquire the first surface image
  • the first surface image includes the image of the first adhesive paper
  • the distance between the background color on the side away from the ear and the color of the first adhesive paper in the first surface image is The color distance is greater than or equal to the first preset value.
  • the second image acquisition device 402 is used to collect the second surface image, the second surface image includes the image of the second adhesive paper, the color distance between the background color on the side away from the ear and the color of the second adhesive paper in the second surface image greater than or equal to the second preset value.
  • the processor 403 is respectively connected in communication with the first image acquisition device 401 and the second image acquisition device 402 to acquire the first surface image and the second surface image.
  • the memory 404 is connected in communication with the processor 403, and the memory 404 stores instructions executable by the processor 403, and the instructions are executed by the processor 403, so that the processor 403 can execute the method for detecting glue on the pole piece surface in the embodiment of the present application.
  • the memory 404 may include a read-only memory and a random access memory, and provides instructions and data to the processor. A part of the memory 404 may also include a non-volatile random access memory (non-volatile random accedd memory, NVRAM).
  • the memory 404 stores operating instructions, executable modules or data structures, or a subset thereof, or an extension thereof.
  • the processor 403 may be an integrated circuit chip and has a signal processing capability. In the implementation process, each step of the method for detecting glue on the pole piece surface in the embodiment of the present application can be completed by an integrated logic circuit of hardware in the processor 403 or instructions in the form of software.
  • the above-mentioned processor 403 can be a general-purpose processor, a digital signal processor (digital signal processing, DSP), a microprocessor or a microcontroller, and can further include an application specific integrated circuit (ASIC), field programmable Field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • the processor can implement or execute the method for detecting glue on the surface of the pole piece in the embodiment of the present application.
  • each operation can also refer to the corresponding description of the above embodiment of the pole piece glue detection method; the processor 403 can also cooperate with other functional hardware to execute other operations in the above pole piece glue detection method embodiment.
  • the present application also provides a pole piece gluing machine, including the aforementioned pole piece gluing detection device.
  • the pole piece adhesive detection device can accurately detect whether the adhesive paper provided on the surface of the pole piece is qualified.
  • the pole piece gluing detection equipment when performing pole piece gluing detection, is set on the periphery of the pole piece gluing machine or on the machine piece gluing machine, and is used in conjunction with the machine piece gluing machine, so that the pole piece can be
  • the glue detection equipment is applied to the pole piece glue sticking machine to provide the glue sticking detection function for the pole piece glue sticking machine.
  • the pole piece gluing machine includes the function of pole piece gluing detection equipment.

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Abstract

一种极片表面贴胶检测方法、装置(300)、设备(400)及极片贴胶机，获取第一表面图像和第二表面图像，通过将第一表面图像中远离极耳侧的背景颜色与第一胶纸的颜色之间的颜色距离设置为大于或等于第一预设值，将第二表面图像中远离极耳侧的背景颜色与第二胶纸的颜色之间的颜色距离大于或等于第二预设值，使得第一胶纸和第二胶纸分别与对应的背景颜色差异明显，从而，能够根据第一表面图像检测识别出第一胶纸的形状以及相对于极片的位置，根据第二表面图像检测识别出第二胶纸的形状以及相对于极片的位置，从而，能够准确判断第一胶纸和第二胶纸是否粘贴合格，进而增加电池的安全性。

Description

极片表面贴胶检测方法、装置、设备及极片贴胶机 技术领域
本申请涉及电池技术领域，具体涉及一种极片表面贴胶检测方法、装置、设备及极片贴胶机。
背景技术
目前电动汽车上主要使用电池作为动力，电池具有高容量、输出电压高、较好的充放电循环性能等特点。在电池的生产过程中，一般需要将阳极极片、阴极极片、隔膜卷绕成卷芯。
然而，随着电池的循环充放电使用，在卷芯内圈拐角处容易出现严重析锂现象，严重时甚至会导致燃爆，对电池的安全性影响极大。
发明内容
鉴于上述问题，本申请提供一种极片表面贴胶检测方法、装置、设备及极片贴胶机，能够准确检测设置于极片表面上的胶纸是否粘贴合格，以增加电池的安全性。
第一方面，本申请提供了一种极片表面贴胶检测方法，极片具有第一表面和第二表面，在第一表面和第二表面分别粘贴有第一胶纸和第二胶纸。该检测方法包括：获取第一表面图像和第二表面图像，其中，第一表面图像包括第一胶纸的图像，第二表面图像包括第二胶纸的图像，第一表面图像中远离极耳侧的背景颜色与第一胶纸的颜色之间的颜色距离大于或等于第一预设值，第二表面图像中远离极耳侧的背景颜色与第二胶纸的颜色之间的颜色距离大于或等于第二预设值，根据第一表面图像和第二表面图像，确定第一胶纸和第二胶纸是否粘贴合格。
本申请实施例的技术方案中，通过将第一表面图像中远离极耳侧的背景颜色与第一胶纸的颜色之间的颜色距离设置为大于或等于第一预设值，将第二表面图像中远离极耳侧的背景颜色与第二胶纸的颜色之间的颜色距离大于或等于第二预设值，使得第一胶纸和第二胶纸分别与对应的背景颜色差异明显，从而，能够根据第一表面图像检测识别出第一胶纸的形状以 及相对极片的位置，根据第二表面图像检测识别出第二胶纸的形状以及相对极片的位置，从而，能够准确判断第一胶纸和第二胶纸胶纸是否粘贴合格，进而增加电池的安全性。
在第一方面的一种可能实现方式中，第一胶纸的颜色和第二胶纸的颜色之间的颜色距离大于或等于第三预设值。
本申请实施例的技术方案中，通过设置第一胶纸的颜色和第二胶纸的颜色之间的颜色距离大于或等于第三预设值，限定第一胶纸的颜色和第二胶纸的颜色之间的区分度，从而，能够从第一表面图像中清晰确定第一胶纸的露头边界，从第二表面图像中清晰确定第二胶纸的露头边界，有利于提高粘合检测的准确性。
在第一方面的一种可能实现方式中，第一预设值大于第三预设值，第二预设值大于第三预设值。
本申请实施例的技术方案中，通过设置第一预设值、第二预设值和第三预设值这三个灰度阈值的大小关系，使得第一胶纸易于从第一表面图像的背景中识别检测以及第二胶纸易于从第二表面图像的背景中识别检测，有利于提高胶纸检测的准确性。
在第一方面的一种可能实现方式中，第一表面图像中远离极耳侧的背景颜色为白色，和/或，第二表面图像中远离极耳侧的背景颜色为白色。
本申请实施例的技术方案中，通过将第一表面图像中远离极耳侧的背景颜色设置为白色，将第二表面图像中远离极耳侧的背景颜色设置为白色，能够清晰衬托出第一胶纸和第二胶纸，与背景区分明显，从而能够清楚识别检测到第一胶纸和第二胶纸，有利于提高胶纸粘贴合格检测的准确性。
在第一方面的一种可能实现方式中，前述“根据第一表面图像和第二表面图像，确定第一胶纸和第二胶纸是否粘贴合格”，包括：根据第一表面图像，获取第一胶纸远离极耳的第一端至极片上远离极耳的涂层边界的第一距离向量；根据第二表面图像，获取第二胶纸远离极耳的第一端至极片上远离极耳的涂层边界的第二距离向量；根据第一距离向量和第二距离向量，确定第一胶纸和第二胶纸是否粘贴合格。
本申请实施例的技术方案中，通过对第一表面图像和第二表面图像进行识别检测，得到第一距离向量和第二距离向量，然后基于第一距离向量 和第二距离向量的大小和方向，能够准确确定第一胶纸和第二胶纸是否粘贴合格。
在第一方面的一种可能实现方式中，前述“根据第一距离向量和第二距离向量，确定第一胶纸和第二胶纸是否粘贴合格”，包括：以朝向极耳的方向为正方向，若第一距离向量大于0且第二距离向量大于0，则确定第一胶纸和第二胶纸粘贴合格。
本申请实施例的技术方案中，通过第一距离向量和第二距离向量的方向，即可准确确定第一胶纸和第二胶纸是否粘贴合格。
在第一方面的一种可能实现方式中，前述“根据第一距离向量和第二距离向量，确定第一胶纸和第二胶纸是否粘贴合格”，包括：
若第一距离向量和第二距离向量之间的差的绝对值在预设范围内，则确定第一胶纸和第二胶纸粘贴合格。
本申请实施例的技术方案中，通过将第一距离向量和第二距离向量之间的差的绝对值与预设范围进行比较，即可准确确定第一胶纸和第二胶纸是否粘贴合格。
在第一方面的一种可能实现方式中，极片上靠近极耳的涂层边界与极耳之间设置有绝缘涂层，绝缘涂层的颜色与第一胶纸的颜色之间的颜色距离大于或等于第四预设值，绝缘涂层的颜色与第二胶纸的颜色距离大于或等于第五预设值，第一表面图像中靠近极耳侧的背景颜色与绝缘涂层的颜色之间的颜色距离大于或等于第六预设值，第二表面图像中靠近极耳的背景颜色与绝缘涂层的颜色之间的颜色距离大于或等于所述第六预设值。
前述“根据第一表面图像和第二表面图像，确定第一胶纸和第二胶纸是否粘贴合格”，还包括：根据第一表面图像，确定第一胶纸靠近极耳的第二端是否在绝缘涂层靠近极耳的边界和绝缘涂层远离极耳的边界之间；根据第二表面图像，确定第二胶纸靠近极耳的第二端是否在绝缘涂层靠近极耳的边界和绝缘涂层远离极耳的边界之间；若第一胶纸靠近极耳的第二端在绝缘涂层靠近极耳的边界和绝缘涂层远离极耳的边界之间、第二胶纸靠近极耳的第二端在绝缘涂层靠近极耳的边界和绝缘涂层远离极耳的边界之间，则确定第一胶纸和第二胶纸粘贴合格。
本申请实施例的技术方案中，一方面，绝缘涂层的颜色与第一胶纸的 颜色之间的颜色距离大于或等于第四预设值，使得第一胶纸的颜色与绝缘涂层的颜色之间的差异明显，在图像检测时容易识别区分第一胶纸和绝缘涂层；绝缘涂层的颜色与第二胶纸的颜色距离大于或等于第五预设值，使得第二胶纸的颜色与绝缘涂层的颜色之间的差异明显，在图像检测时容易识别区分第二胶纸和绝缘涂层。另一方面，通过将第一表面图像中靠近极耳侧的背景颜色与绝缘涂层的颜色之间的颜色距离设置为大于或等于第六预设值，将第二表面图像中靠近极耳的背景颜色与绝缘涂层的颜色之间的颜色距离设置为大于或等于第六预设值，使得第一表面和第二表面上绝缘涂层分别在第一表面图像和第二表面图像中颜色明显，从而，在对第一表面图像进行识别检测时，能够更加准确地抓取绝缘涂层的两个边界，在对第二表面图像进行识别检测时，能够更加准确地抓取绝缘涂层的两个边界。从上述两个方面，可以有效提高胶纸粘合检测的准确性。
在第一方面的一种可能实现方式中，第六预设值大于第四预设值，和/或，第六预设值大于第五预设值。
本申请实施例的技术方案中，通过设置第四预设值、第五预设值和第六预设值这三个灰度阈值的大小关系，使得绝缘涂层易于从第一表面图像的背景中识别检测以及从第二表面图像的背景中识别检测，有利于提高胶纸检测的准确性。
在第一方面的一种可能实现方式中，第一表面图像中靠近极耳侧的背景颜色为黑色，和/或，第二表面图像中靠近极耳侧的背景颜色为黑色。
本申请实施例的技术方案中，通过将第一表面图像中靠近极耳侧的背景颜色设置为黑色，将第二表面图像中靠近极耳侧的背景颜色设置为黑色，使得极片上绝缘涂层与背景区分明显，从而能够清楚抓取到绝缘涂层的两个边界，有利于提高胶纸粘贴合格检测的准确性。
第二方面，本申请提供了一种极片表面贴胶检测装置，包括图像获取模块和粘贴合格确定模块。其中，图像获取模块用于获取第一表面图像和第二表面图像，其中，第一表面图像包括第一胶纸的图像，第二表面图像包括第二胶纸的图像，第一表面图像中远离极耳侧的背景颜色与第一胶纸的颜色之间的颜色距离大于或等于第一预设值，第二表面图像中远离极耳侧的背景颜色与第二胶纸的颜色之间的颜色距离大于或等于第二预设值。 粘贴合格确定模块用于根据第一表面图像和第二表面图像，确定第一胶纸和第二胶纸是否粘贴合格。
本申请实施例的技术方案中，通过将第一表面图像中远离极耳侧的背景颜色与第一胶纸的颜色之间的颜色距离设置为大于或等于第一预设值，将第二表面图像中远离极耳侧的背景颜色与第二胶纸的颜色之间的颜色距离大于或等于第二预设值，使得第一胶纸和第二胶纸分别与对应的背景颜色差异明显，从而，能够根据第一表面图像检测识别出第一胶纸的形状以及相对极片的位置，根据第二表面图像检测识别出第二胶纸的形状以及相对极片的位置，从而，能够准确判断第一胶纸和第二胶纸胶纸是否粘贴合格，进而增加电池的安全性。
第三方面，本申请提供了一种极片贴胶检测设备，极片具有第一表面和第二表面，在极片的预设位置处的第一表面和第二表面分别粘贴有第一胶纸和第二胶纸。该极片贴胶检测设备包括第一图像采集装置、第二图像采集装置、处理器和存储器。
其中，第一图像采集装置用于采集第一表面图像，第一表面图像包括第一胶纸的图像，第一表面图像中远离极耳侧的背景颜色与第一胶纸的颜色之间的颜色距离大于或等于第一预设值。第二图像采集装置用于采集第二表面图像，第二表面图像包括第二胶纸的图像，第二表面图像中远离极耳侧的背景颜色与第二胶纸的颜色之间的颜色距离大于或等于第二预设值。处理器分别与第一图像采集装置和第二图像采集装置通信连接，以获取第一表面图像和第二表面图像。存储器与处理器通信连接，存储器存储有可被处理器执行的指令，指令被处理器执行，以使处理器能够执行如第一方面中的方法。
本申请实施例的技术方案中，极片贴胶检测设备能够准确检测设置于极片表面上的胶纸是否粘贴合格。
第四方面，本申请提供了一种极片贴胶机，包括如第三方面所述的极片贴胶检测设备。
本申请实施例的技术方案中，极片贴胶机具有准确的胶纸检测功能，有益于确保极片贴胶合格。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的 技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
通过阅读对下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在全部附图中，用相同的附图标号表示相同的部件。在附图中：
图1为本申请一些实施例中卷芯的示意图；
图2为本申请一些实施例中极片贴胶纸的示意图；
图3为本申请一些实施例中极片表面贴胶检测方法的流程示意图；
图4(a)为本申请一些实施例中第一表面图像的拍摄示意图；
图4(b)为本申请一些实施例中第二表面图像的拍摄示意图；
图5为本申请一些实施例中颜色空间的示意图；
图6为图3所示方法中步骤S20的一子流程示意图；
图7为本申请一些实施例中第一距离向量X和第二距离向量Y的示意图；
图8为图3所示方法中步骤S20的另一子流程示意图；
图9为本申请一些实施例中极片表面贴胶检测装置300的结构示意图；
图10为本申请一些实施例中极片贴胶检测设备400的结构示意图。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
随着绿色能源的发展，电池的应用越来越广泛，尤其是在近年来兴起 的新能源汽车领域、信息家电领域或光伏发电领域，电池都作为重要的储能供电设备，例如，为新能源汽车或终端设备等供电，为太阳能板储能。随着电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
然而，随着电池的循环充放电使用，在卷芯最内圈拐角处容易出现严重析锂现象，严重时甚至会导致燃爆，对电池的安全性影响极大。
目前，请参阅图1，一般在极片的模切分条工序和卷绕工序之间引入贴胶工序，使得在卷芯最内圈极片的两个拐角处对应的地方贴上胶纸，能够有效防止析锂。具体地，请参阅图2，在极片模切分条完成后，以极片的第一个极耳为参照(在极片卷绕时，第一个极耳最先被卷入卷芯内)，在距离第一个极耳一预设距离(例如51±2mm)处定位第一对胶纸的中心线位置L1，则贴胶机在极片L1处的AB面上分别贴第一胶纸和第二胶纸；在距离第一个极耳另一预设距离(例如250±2mm)处定位第二对胶的中心线位置L2，则贴胶机在极片L2处的AB面上分别贴第一胶纸和第二胶纸。可以理解的是，这里的AB面分别是指极片的两个表面。
对于卷芯最内圈一拐角处，例如L1处，贴胶后的状态是：在靠近极耳侧，第一胶纸和第二胶纸的端头在绝缘涂层的两个边界之间，在远离极耳侧，第一胶纸和第二胶纸的端头超出极片边界一定长度，例如超出极片边界2～3mm，可以理解的是，具体超出长处可以根据实际情况设置。从而，可以保证，在极片的远离极耳侧，第一胶纸和第二胶纸的端头能“粘合”，即搭在一起、端头有重叠，这样第一胶纸和第二胶纸在极片后续的卷绕过棍过程中不易脱落，能有效防止极片内圈拐角处(即L1和L2处)析锂。
在贴完胶纸后，首先需要对胶纸进行检测，以判断极片表面所贴的胶纸是否粘贴合格。一般是通过相机对极片进行拍照，然后对拍摄的图像进行处理来完成对胶纸的粘贴合格检测，并将检测得出的不合格胶纸进行标注。然而，在检测时因胶纸不容易识别区分而导致检测结果不准确，即无法对胶纸脱落的情况进行防呆监控。
基于以上考虑，本申请发明人经过研究发现，可以设置胶纸颜色与背景颜色，使得胶纸颜色与背景颜色之间的差异较大，从而，在图像检测识别时，易于识别区分胶纸，因此，能够准确检测设置于极片表面上的胶纸是否粘贴合格，以增加电池的安全性。
具体地，极片具有第一表面和第二表面，在第一表面和第二表面分别粘贴有第一胶纸和第二胶纸。首先，获取第一表面图像和第二表面图像，其中，第一表面图像包括第一胶纸的图像，第二表面图像包括第二胶纸的图像。其中，第一表面图像中远离极耳侧的背景颜色与第一胶纸的颜色之间的颜色距离大于或等于第一预设值，第二表面图像中远离极耳侧的背景颜色与第二胶纸的颜色之间的颜色距离大于或等于第二预设值。
然后，根据第一表面图像和第二表面图像，确定第一胶纸和第二胶纸是否粘贴合格。
基于第一表面图像中远离极耳侧的背景颜色与第一胶纸的颜色之间的颜色距离大于或等于第一预设值，使得第一胶纸的颜色与其下面的背景颜色之间的差异明显，在图像检测时容易识别区分第一胶纸。
基于第二表面图像中远离极耳侧的背景颜色与第二胶纸的颜色之间的颜色距离大于或等于第二预设值，使得第二胶纸的颜色与其下面的背景颜色之间的差异明显，在图像检测时容易识别区分第二胶纸。
在上述方案中，通过将第一表面图像中远离极耳侧的背景颜色与第一胶纸的颜色之间的颜色距离设置为大于或等于第一预设值，将第二表面图像中远离极耳侧的背景颜色与第二胶纸的颜色之间的颜色距离大于或等于第二预设值，使得第一胶纸和第二胶纸分别与对应的背景颜色差异明显，从而，能够根据第一表面检测识别出第一胶纸的形状以及相对极片的位置，根据第二表面图像检测识别出第二胶纸的形状以及相对极片的位置，从而，能够准确判断第一胶纸和第二胶纸胶纸是否粘贴合格，进而增加电池的安全性。
由于本申请实施例提供的方法涉及极片表面贴胶检测方法，该方法可以应用于极片贴胶检测设备。
可以理解的是，在进行贴胶检测时，即在模切分条工序和卷绕工序之间引入的贴胶工序被执行时进行贴胶检测，极片贴胶检测设备设置于极片贴胶机上，从而，可以将极片贴胶检测设备应用于极片贴胶机，为极片贴胶机提供贴胶检测功能。从而，极片贴胶机包括极片贴胶检测设备。
根据本申请的一些实施例，请参照图3，图3为本申请实施例提供的极片表面贴胶检测方法的流程示意图，该方法S200具体可以包括如下步 骤：
S10：获取第一表面图像和第二表面图像。
可以理解的是，极片具有第一表面和第二表面。这里的极片可以是阴极极片或阳极极片，例如需要在阴极极片上贴胶纸并进行胶纸检测时这里的极片为阴极极片，需要在阳极极片上贴胶纸并进行胶纸检测时这里的极片为阳极极片，因此，极片可以根据实际情况是阴极极片或阳极极片，在此，不进行任何限制。
极片呈片状结构，第一表面和第二表面为极片的正反面，也称为AB面。若在卷芯中朝中心轴的表面为正面(或A面)，远离中心轴的表面为反面(或B面)，则当第一表面为正面(或A面)时，第二表面为反面(或B面)，当第一表面为反面(或B面)时，第二表面为正面(或A面)。
在第一表面和第二表面分别粘贴有第一胶纸和第二胶纸。请再次参阅图2，如图2所示，在极片的第一表面的L1和L2处贴有第一胶纸，在极片的第二表面的L1和L2处贴有第二胶纸。对于L1或L2处，第一胶纸和第二胶纸的中心线均与L1或L2大致重合，从而，第一胶纸和第二胶纸在垂直于极片方向的投影也是大致重合的。并且，第一胶纸和第二胶纸均超出极片远离极耳侧的边界，即第一胶纸和第二胶纸均存在露头，并且露头在静电作用下是粘合在一起的。
其中，第一表面图像包括第一胶纸的图像，第二表面图像包括第二胶纸的图像。请参阅图4，例如，在极片传输的过程中，相机1#对着第一表面拍摄可以获得第一表面图像，从而第一表面图像包括第一胶纸，相机2#对着第二表面拍摄可以获得第二表面图像，从而第二表面图像包括第二胶纸。
第一表面图像中远离极耳侧的背景颜色与第一胶纸的颜色之间的颜色距离大于或等于第一预设值。可以理解的是，在拍摄第一表面图像时，可以在极片下方布置背景，例如背景可以为传输台面、辊轮或设置的背景板等。将远离极耳侧的背景颜色(即第一胶纸的露头下方的背景颜色)与第一胶纸的颜色设置为差异大的两颜色，具体地，如图5所示，在颜色空间中，第一表面图像中远离极耳侧的背景颜色与第一胶纸的颜色之间的颜色距离大于或等于第一预设值，使得使得第一胶纸的颜色与其下面的背景颜 色之间的差异明显，在图像检测时容易识别区分第一胶纸。
第二表面图像中远离极耳侧的背景颜色与第二胶纸的颜色之间的颜色距离大于或等于第二预设值。可以理解的是，在拍摄第二表面图像时，可以在极片下方布置背景，例如背景可以为传输台面、辊轮或设置的背景板等。将远离极耳侧的背景颜色(即第二胶纸的露头下方的背景颜色)与第二胶纸的颜色设置为差异大的两颜色，具体地，请再次参阅图5，在颜色空间中，第二表面图像中远离极耳侧的背景颜色与第二胶纸的颜色之间的颜色距离大于或等于第二预设值，使得第二胶纸的颜色与其下面的背景颜色之间的差异明显，在图像检测时容易识别区分第二胶纸。
可以理解的是，第一预设值和第二预设值是经验值，具体可由本领域技术人员根据图像检测需求而设置，在此不做任何限制。其中，颜色空间可以为RGB颜色空间或CMY颜色空间等，在此不做任何限制。颜色距离为两种颜色在颜色空间中的距离。
在一些实施例中，当第一表面图像和第二表面图像为三通道彩色图像时，颜色距离可以采用三通道的灰度值进行计算。具体地，采用如下公式计算颜色C 1和颜色C 2之间的颜色距离；
Figure PCTCN2022072117-appb-000001
其中，‖C 1-C 2‖为颜色C 1和颜色C 2之间的颜色距离，C 1,R为颜色C 1的R通道灰度值，C 1,G为颜色C 1的G通道灰度值，C 1,B为颜色C 1的B通道灰度值，C 2,R为颜色C 2的R通道灰度值，C 2,G为颜色C 2的G通道灰度值，C 2,B为颜色C 2的B通道灰度值。
在一些实施例中，也可以采用单通道的灰度值计算颜色距离，例如，采用R通道的灰度值计算颜色C 1和颜色C 2之间的颜色距离，具体公式如下：
Figure PCTCN2022072117-appb-000002
其中，‖C 1-C 2‖为颜色C 1和颜色C 2之间的颜色距离，C 1,R为颜色C 1的R通道灰度值，C 2,R为颜色C 2的R通道灰度值。
可以理解的是，颜色距离越大说明两种颜色的色差越大，越容易区分，颜色距离越小说明两种颜色的色差越小，不容易区分。
S20：根据第一表面图像和第二表面图像，确定第一胶纸和第二胶纸 是否粘贴合格。
在获取到易于区分第一胶纸的第一表面图像和易于区分第二胶纸的第二表面图像后，从而，可以对第一表面图像和第二表面图像采用现有的图像识别算法或像素对比算法，获取第一胶纸的形状和位置，以及，第二胶纸的形状和位置，从而，通过对比第一胶纸和第二胶纸的形状、位置，确定第一胶纸和第二胶纸是否粘贴合格。
在此实施例中，通过将第一表面图像中远离极耳侧的背景颜色与第一胶纸的颜色之间的颜色距离设置为大于或等于第一预设值，将第二表面图像中远离极耳侧的背景颜色与第二胶纸的颜色之间的颜色距离大于或等于第二预设值，使得第一胶纸和第二胶纸分别与对应的背景颜色差异明显，从而，能够根据第一表面图像检测识别出第一胶纸的形状以及相对极片的位置，根据第二表面图像检测识别出第二胶纸的形状以及相对极片的位置，从而，能够准确判断第一胶纸和第二胶纸胶纸是否粘贴合格，进而增加电池的安全性。
根据本申请的一些实施例，可选地，第一胶纸的颜色和第二胶纸的颜色之间的颜色距离大于或等于第三预设值。
在粘贴合格的情况下，第一胶纸的露头和第二胶纸的露头有重叠，为了更好地区分第一胶纸和第二胶纸，将第一胶纸的颜色和第二胶纸的颜色之间的颜色距离设置为大于或等于第三预设值。可以理解的是，第三预设值为设置的灰度值阈值，用于限定第一胶纸的颜色和第二胶纸的颜色之间的区分度，具体可由本领域技术人员根据实际情况而设置。
在一些实施例中，第一胶纸可以为棕色(棕色的R通道灰度值为80-90)，第二胶纸可以为蓝色(蓝色的R通道灰度值为40-50)，第三预设值可以为20或30等。基于棕色和蓝色区分度高，从而，即使第一胶纸和第二胶纸重叠，也能从第一表面图像中清晰确定第一胶纸的露头边界，从第二表面图像中清晰确定第二胶纸的露头边界。
可以理解的是，在一些实施例中，基于第一胶纸和第二胶纸很薄，具有一定的透光性，所以第一胶纸的露头和第二胶纸的露头即使重叠在一起，重叠部分颜色会变深，使得第一胶纸的露头边界和第二胶纸的露头边界清晰且容易区分。因此，在此实施例中，即使第一胶纸和第二胶纸的颜色相 近或相同，也能从第一表面图像中清晰确定第一胶纸的露头边界，从第二表面图像中清晰确定第二胶纸的露头边界。
在上述实施例中，通过设置第一胶纸的颜色和第二胶纸的颜色之间的颜色距离大于或等于第三预设值，限定第一胶纸的颜色和第二胶纸的颜色之间的区分度，从而，能够从第一表面图像中清晰确定第一胶纸的露头边界，从第二表面图像中清晰确定第二胶纸的露头边界，有利于提高粘合检测的准确性。
根据本申请的一些实施例，可选地，第一预设值大于第三预设值，第二预设值大于第三预设值。
可以理解的是，第一预设值用于限定第一胶纸的颜色和第一表面图像中远离极耳侧的背景颜色之间的区分度；第二预设值用于限定第二胶纸的颜色和第二表面图像中远离极耳侧的背景颜色之间的区分度；第三预设值用于限定第一胶纸的颜色和第二胶纸的颜色之间的区分度。
基于灰度阈值越大、区分度越高，将第一预设值设置为大于第三预设值，使得第一胶纸的颜色和第一表面图像中远离极耳侧的背景颜色之间的区分度高于第一胶纸的颜色和第二胶纸的颜色之间的区分度，从而第一胶纸易于从第一表面图像的背景中识别检测；同理，将第二预设值设置为大于第三预设值，使得第二胶纸的颜色和第二表面图像中远离极耳侧的背景颜色之间的区分度高于第一胶纸的颜色和第二胶纸的颜色之间的区分度，从而第二胶纸易于从第二表面图像的背景中识别检测。
在此实施例中，通过设置第一预设值、第二预设值和第三预设值这三个灰度阈值的大小关系，使得第一胶纸易于从第一表面图像的背景中识别检测以及第二胶纸易于从第二表面图像的背景中识别检测，有利于提高胶纸检测的准确性。
根据本申请的一些实施例，可选地，第一表面图像中远离极耳侧的背景颜色为白色，和/或，第二表面图像中远离极耳侧的背景颜色为白色。
例如，请再次参阅图4，在拍摄第一表面图像时，基于相机1#的视角，在极片的第二表面下方设置辊轮，一方面可以传输极片，另一方面，辊轮可以作为拍摄第一表面图像的背景。远离极耳侧的极片边缘投影在辊轮上的区域为第一表面图像中远离极耳侧的背景颜色，将远离极耳侧的极片边 缘投影在辊轮上的区域设置为白色。
可以理解的是，在拍摄第一表面图像时，基于相机1#的视角，在极片的第二表面下方设置背景板，远离极耳侧的极片边缘投影在背景板上的区域为第一表面图像中远离极耳侧的背景颜色，将远离极耳侧的极片边缘投影在背景板上的区域设置为白色。
基于白色的灰度值为255附近，与极片颜色(极片一般为黑色)区分明显，从而能够清楚抓取到极片边缘，另外，白色还与第一胶纸的颜色区分明显，从而能够清楚识别检测到第一胶纸的露头边界。
同理，在一些实施例中，在拍摄第二表面图像时，基于相机2#的视角，在极片的第一表面下方设置辊轮，一方面可以传输极片，另一方面，辊轮可以作为拍摄第二表面图像的背景。远离极耳侧的极片边缘投影在辊轮上的区域为第二表面图像中远离极耳侧的背景颜色，将远离极耳侧的极片边缘投影在辊轮上的区域设置为白色。
可以理解的是，在拍摄第二表面图像时，基于相机2#的视角，在极片的第一表面下方设置背景板，远离极耳侧的极片边缘投影在背景板上的区域为第二表面图像中远离极耳侧的背景颜色，将远离极耳侧的极片边缘投影在背景板上的区域设置为白色。
基于白色的灰度值为255附近，与极片颜色(极片一般为黑色)区分明显，从而能够清楚抓取到极片边缘，另外，白色还与第二胶纸的颜色区分明显，从而能够清楚识别检测到第二胶纸的露头边界。
在此实施例中，通过将第一表面图像中远离极耳侧的背景颜色设置为白色，将第二表面图像中远离极耳侧的背景颜色设置为白色，能够清晰衬托出第一胶纸和第二胶纸，与背景区分明显，从而能够清楚识别检测到第一胶纸和第二胶纸，有利于提高胶纸粘贴合格检测的准确性。
根据本申请的一些实施例，可选地，请参阅图6，上述步骤S20具体包括：
S21：根据第一表面图像，获取第一胶纸远离极耳的第一端至极片上远离极耳的涂层边界的第一距离向量。
S22：根据第二表面图像，获取第二胶纸远离极耳的第一端至极片上远离极耳的涂层边界的第二距离向量。
S23：根据第一距离向量和第二距离向量，确定第一胶纸和第二胶纸是否粘贴合格。
如图7(a)所示，在第一表面图像中，通过现有的边缘检测算法，可以获取第一胶纸的边缘，从而可以获取第一胶纸远离极耳的第一端，即第一胶纸远离极耳的端部边界。可以理解的是，极片的第一表面和第二表面上均涂覆有极片涂层，通过现有的边缘检测算法，可以获取极片涂层的边缘，即抓取极片上远离极耳的涂层边界。通过第一胶纸远离极耳的端部边界至极片上远离极耳的涂层边界的像素距离，即可换算得到第一胶纸远离极耳的第一端至极片上远离极耳的涂层边界的第一距离向量X。
如图7(b)所示，在第二表面图像中，通过现有的边缘检测算法，可以获取第二胶纸的边缘，从而可以获取第二胶纸远离极耳的第一端，即第二胶纸远离极耳的端部边界。可以理解的是，极片的第一表面和第二表面上均涂覆有极片涂层，通过现有的边缘检测算法，可以获取极片涂层的边缘，即抓取极片上远离极耳的涂层边界。通过第二胶纸远离极耳的端部边界至极片上远离极耳的涂层边界的像素距离，即可换算得到第二胶纸远离极耳的第一端至极片上远离极耳的涂层边界的第二距离向量Y。
可以理解的是，在图7(a)和图7(b)中，为了清楚标示出第一距离向量X和第二距离向量Y，调整了实际的比例，即图7(a)和图7(b)中的比例对本申请不构成任何限制。
在获取到第一距离向量X和第二距离向量Y之后，可以根据第一距离向量X的大小和方向以及第二距离向量Y的大小和方向，确定第一胶纸和第二胶纸是否粘贴合格。例如，若第一距离向量X和第二距离向量Y均朝向极耳方向，则说明第一胶纸远离极耳的第一端和第二胶纸远离极耳的第一端均超出了极片上远离极耳的涂层边界，即第一胶纸和第二胶纸均存在露头，并且两者的露头还能在静电作用下结合在一起，从而后续的卷绕过棍过程中不易脱落。
在此实施例中，通过对第一表面图像和第二表面图像进行识别检测，得到第一距离向量和第二距离向量，然后基于第一距离向量和第二距离向量的大小和方向，能够准确确定第一胶纸和第二胶纸是否粘贴合格。
根据本申请的一些实施例，可选地，上述步骤S23具体包括：
以朝向极耳的方向为正方向，若第一距离向量大于0且第二距离向量大于0，则确定第一胶纸和第二胶纸粘贴合格。
请再次参阅图7(a)和图7(b)，以朝向极耳的方向为正方向，即箭头e的方向为正方向，若第一距离向量大于0，说明第一距离向量朝向正方向，第一胶纸远离极耳的第一端超出了极片上远离极耳的涂层边界。若第二距离向量大于0，说明第二距离向量朝向正方向，第二胶纸远离极耳的第一端超出了极片上远离极耳的涂层边界。即第一胶纸和第二胶纸均存在露头，并且两者的露头还能在静电作用下结合在一起，从而后续的卷绕过棍过程中不易脱落。
在此实施例中，通过第一距离向量和第二距离向量的方向，即可准确确定第一胶纸和第二胶纸是否粘贴合格。
根据本申请的一些实施例，可选地，上述步骤S23具体包括：
若第一距离向量和第二距离向量之间的差的绝对值在预设范围内，则确定第一胶纸和第二胶纸粘贴合格。
其中，第一距离向量X和第二距离向量Y之间的差的绝对值为|X-Y|。预设范围[0,N]为本领域技术人员根据胶纸的露头情况而设置的经验值，例如N可以为3mm。
若0≤|X-Y|≤N，则说明第一胶纸远离极耳的第一端超出了极片上远离极耳的涂层边界，第二胶纸远离极耳的第一端超出了极片上远离极耳的涂层边界，即第一胶纸和第二胶纸均存在露头，粘贴合格。可以理解的是，若|X-Y|＞3，则说明出现“不合理情况”，例如“不合理情况”可能包括第一胶纸的露头量为3mm，则第二胶纸没有露头，或第二胶纸面胶的露头量大于6mm，与设置的不符，也说明胶纸粘贴不合格。
在此实施例中，通过将第一距离向量和第二距离向量之间的差的绝对值与预设范围进行比较，即可准确确定第一胶纸和第二胶纸是否粘贴合格。
根据本申请的一些实施例，可选地，请参阅图7，极片上靠近极耳的涂层边界与极耳之间设置有绝缘涂层。可以理解的是，绝缘涂层由绝缘材料制成。绝缘涂层能够防止因相邻的极片涂层与极片箔材接触而引起的内部短路。
绝缘涂层的颜色与第一胶纸的颜色之间的颜色距离大于或等于第四预设值，绝缘涂层的颜色与第二胶纸的颜色距离大于或等于第五预设值。
其中，第四预设值为设置的灰度阈值，用于限定第一胶纸的颜色和绝缘涂层的颜色之间的区分度。第五预设值为设置的灰度阈值，用于限定第二胶纸的颜色和绝缘涂层的颜色之间的区分度。可以理解的是，第四预设值和第五预设值具体可由本领域技术人员根据实际情况而设置，在一些实施例中，第四预设值可以相同，也可以不相同。
可以理解的是，颜色距离越大说明两种颜色的色差越大，越容易区分，颜色距离越小说明两种颜色的色差越小，不容易区分。
在颜色空间中，绝缘涂层的颜色与第一胶纸的颜色之间的颜色距离大于或等于第四预设值，使得第一胶纸的颜色与绝缘涂层的颜色之间的差异明显，在图像检测时容易识别区分第一胶纸和绝缘涂层。
在颜色空间中，绝缘涂层的颜色与第二胶纸的颜色距离大于或等于第五预设值，使得第二胶纸的颜色与绝缘涂层的颜色之间的差异明显，在图像检测时容易识别区分第二胶纸和绝缘涂层。
在一些实施例中，绝缘涂层的颜色可以为白色(灰度值在255附近)，第一胶纸可以为棕色(棕色的R通道灰度值为80-90)，第二胶纸可以为蓝色(蓝色的R通道灰度值为40-50)，第四预设值和第五预设值可以为100或150等。基于棕色和蓝色分别与白色的区分度高，从而，能够清晰检测出绝缘涂层上的第一胶纸和第二胶纸。
为了更好地区分绝缘涂层和背景，第一表面图像中靠近极耳侧的背景颜色与绝缘涂层的颜色之间的颜色距离大于或等于第六预设值，第二表面图像中靠近极耳的背景颜色与绝缘涂层的颜色之间的颜色距离大于或等于第六预设值。
请再次参阅图4，在极片传输的过程中，相机1#对着第一表面拍摄可以获得第一表面图像，从而第一表面图像包括第一胶纸，相机2#对着第二表面拍摄可以获得第二表面图像，从而第二表面图像包括第二胶纸。
“第一表面图像中靠近极耳侧的背景颜色与绝缘涂层的颜色之间的颜色距离大于或等于第六预设值”的具体实现方式可以是：在拍摄第一表面图像时，可以在极片下方布置背景，例如背景可以为传输台面、辊轮或设 置的背景板等。将靠近极耳侧的背景颜色(即绝缘涂层下方的背景颜色)与第一胶纸的颜色设置为颜色距离大于或等于第六预设值的两颜色。
“第二表面图像中靠近极耳的背景颜色与绝缘涂层的颜色之间的颜色距离大于或等于第六预设值”的具体实现方式可以是：在拍摄第二表面图像时，可以在极片下方布置背景，例如背景可以为传输台面、辊轮或设置的背景板等。将靠近极耳侧的背景颜色(即绝缘涂层下方的背景颜色)与第二胶纸的颜色设置为颜色距离大于或等于第六预设值的两颜色。
从而，在对第一表面图像进行识别检测时，能够更加准确地抓取绝缘涂层的两个边界，在对第二表面图像进行识别检测时，能够更加准确地抓取绝缘涂层的两个边界。
请参阅图8，上述步骤S20具体还包括：
S24：根据第一表面图像，确定第一胶纸靠近极耳的第二端是否在绝缘涂层靠近极耳的边界和绝缘涂层远离极耳的边界之间。
在获取到易于区分第一胶纸和绝缘涂层的第一表面图像后，从而，可以对第一表面图采用现有的图像识别算法或像素对比算法，获取绝缘涂层靠近极耳的边界和绝缘涂层远离极耳的边界，以及获取第一胶纸靠近极耳的第二端。因此，通过绝缘涂层的两边界和第一胶纸的第二端之间的位置关系即可确定第一胶纸靠近极耳的第二端是否在绝缘涂层靠近极耳的边界和绝缘涂层远离极耳的边界之间。
S25：根据第二表面图像，确定第二胶纸靠近极耳的第二端是否在绝缘涂层靠近极耳的边界和绝缘涂层远离极耳的边界之间。
在获取到易于区分第二胶纸和绝缘涂层的第二表面图像后，从而，可以对第二表面图采用现有的图像识别算法或像素对比算法，获取绝缘涂层靠近极耳的边界和绝缘涂层远离极耳的边界，以及获取第二胶纸靠近极耳的第二端。因此，通过绝缘涂层的两边界和第二胶纸的第二端之间的位置关系即可确定第二胶纸靠近极耳的第二端是否在绝缘涂层靠近极耳的边界和绝缘涂层远离极耳的边界之间。
S26：若第一胶纸靠近极耳的第二端在绝缘涂层靠近极耳的边界和绝缘涂层远离极耳的边界之间、第二胶纸靠近极耳的第二端在绝缘涂层靠近极耳的边界和绝缘涂层远离极耳的边界之间，则确定第一胶纸和第二胶纸 粘贴合格。
请再次参阅图7，对于第一胶纸的第二端和第二胶纸的第二端，向极耳方向延伸，应该超出绝缘涂层远离极耳的边界1#，且未超出绝缘涂层靠近极耳的边界2#，说明第一胶纸和第二胶纸粘贴合格。
在此实施例中，一方面，绝缘涂层的颜色与第一胶纸的颜色之间的颜色距离大于或等于第四预设值，使得第一胶纸的颜色与绝缘涂层的颜色之间的差异明显，在图像检测时容易识别区分第一胶纸和绝缘涂层；绝缘涂层的颜色与第二胶纸的颜色距离大于或等于第五预设值，使得第二胶纸的颜色与绝缘涂层的颜色之间的差异明显，在图像检测时容易识别区分第二胶纸和绝缘涂层。另一方面，通过将第一表面图像中靠近极耳侧的背景颜色与绝缘涂层的颜色之间的颜色距离设置为大于或等于第六预设值，将第二表面图像中靠近极耳的背景颜色与绝缘涂层的颜色之间的颜色距离设置为大于或等于第六预设值，使得第一表面和第二表面上绝缘涂层分别在第一表面图像和第二表面图像中颜色明显，从而，在对第一表面图像进行识别检测时，能够更加准确地抓取绝缘涂层的两个边界，在对第二表面图像进行识别检测时，能够更加准确地抓取绝缘涂层的两个边界。从上述两个方面，可以有效提高胶纸粘合检测的准确性。
根据本申请的一些实施例，可选地，第六预设值大于第四预设值，和/或，第六预设值大于第五预设值。
可以理解的是，第六预设值用于限定第一表面图像中靠近极耳侧的背景颜色与绝缘涂层的颜色之间的区分度，以及，第二表面图像中靠近极耳侧的背景颜色与绝缘涂层的颜色之间的区分度。第四预设值用于用于限定第一胶纸的颜色和绝缘涂层的颜色之间的区分度。第五预设值用于限定第二胶纸的颜色和绝缘涂层的颜色之间的区分度。
基于灰度阈值越大、区分度越高，将第六预设值设置为大于第四预设值，使得第一表面图像中靠近极耳侧的背景颜色与绝缘涂层的颜色之间的区分度高于第一胶纸的颜色和绝缘涂层的颜色之间的区分度，从而，在对第一表面图像进行图像检测时，更容易准确抓取绝缘涂层的两个边界，以绝缘涂层的两个边界为参考确定第一胶纸的第二端，有利于提高胶纸检测的准确性。将第六预设值设置为大于第五预设值，使得第二表面图像中靠 近极耳侧的背景颜色与绝缘涂层的颜色之间的区分度高于第二胶纸的颜色和绝缘涂层的颜色之间的区分度，从而，在对第二表面图像进行图像检测时，更容易准确抓取绝缘涂层的两个边界，以绝缘涂层的两个边界为参考确定第一胶纸的第二端，有利于提高胶纸检测的准确性。
在此实施例中，通过设置第四预设值、第五预设值和第六预设值这三个灰度阈值的大小关系，使得绝缘涂层易于从第一表面图像的背景中识别检测以及从第二表面图像的背景中识别检测，有利于提高胶纸检测的准确性。
根据本申请的一些实施例，可选地，第一表面图像中靠近极耳侧的背景颜色为黑色，和/或，第二表面图像中靠近极耳侧的背景颜色为黑色。
例如，请再次参阅图4，在拍摄第一表面图像时，在极片的第二表面下方设置辊轮，一方面可以传输极片，另一方面，辊轮可以作为拍摄第一表面图像的背景。靠近极耳侧的极片边缘投影在辊轮上的区域为第一表面图像中远靠近耳侧的背景颜色，将靠近极耳侧的极片边缘投影在辊轮上的区域设置为黑色。
可以理解的是，在拍摄第一表面图像时，在极片的第二表面下方设置背景板，靠近极耳侧的极片边缘投影在背景板上的区域为第一表面图像中靠近极耳侧的背景颜色，将靠近极耳侧的极片边缘投影在背景板上的区域设置为黑色。
基于黑色的灰度值为0附近，与极片上绝缘涂层的颜色(绝缘涂层一般为白色)区分明显，从而能够清楚抓取到绝缘涂层的两个边界。
在此实施例中，通过将第一表面图像中靠近极耳侧的背景颜色设置为黑色，将第二表面图像中靠近极耳侧的背景颜色设置为黑色，使得极片上绝缘涂层与背景区分明显，从而能够清楚抓取到绝缘涂层的两个边界，有利于提高胶纸粘贴合格检测的准确性。
根据本申请的一些实施例，提供一种极片表面贴胶检测方法，被检测的极片具有第一表面和第二表面。在第一表面和第二表面分别粘贴有第一胶纸和第二胶纸，第一胶纸为棕色，第二胶纸为蓝色。棕色和蓝色之间的颜色距离大于40(第三预设值)。
该极片表面贴胶检测方法应用于模切分条工序和卷绕工序之间。该方 法包括：
(1)如图4所示，采用相机1#获取第一表面图像，采用相机2#获得第二表面图像，第一表面图像包括第一胶纸的图像，第二表面图像包括第二胶纸的图像，在图4中未示出第一胶纸和第二胶纸。
极片的第一表面和第二表面均涂覆有黑色的电化学涂层材料，在靠近极耳的涂层边界与极耳之间设置有白色的绝缘涂层。粘贴合格时，第一胶纸的第一端和第二胶纸的第一端应该超出极片上远离极耳侧的涂层边界，第一胶纸的第二端和第二胶纸的第二端超出绝缘涂层远离极耳的边界且未超出绝缘涂层靠近极耳的边界。
其中，相机1#在拍摄第一表面图像时，背景为一黑白辊轮，黑白辊轮的一端为黑色，另一端为白色。极片在黑白辊轮上传输，相机1#获取该黑白辊轮上极片段的图像，极片远离极耳侧的边缘落于黑白辊轮上的白色区域，极片靠近极耳侧的边缘落于黑白辊轮上的黑色区域。因此，第一胶纸的第一端和第二胶纸的第一端落于黑白辊轮上的白色区域，基于白色和棕色的颜色距离大致为170(大于第一预设值)，白色和蓝色的颜色距离大致为200(大于第二预设值)，从而，棕色的第一胶纸的第一端和蓝色的第二胶纸的第一端在白色背景下易于区分识别。第一胶纸的第二端和第二胶纸的第二端落于白色的绝缘涂层上，白色的绝缘涂层落于黑白辊轮上的黑色区域，基于白色和黑色的颜色距离大致为255(大于第六预设值)，白色和棕色的颜色距离大致为170(大于第四预设值)，白色和蓝色的颜色距离大致为200(大于第五预设值)从而，白色的绝缘涂层在黑色背景下易于区分识别，第一胶纸的第二端和第二胶纸的第二端在白色背景下易于区分识别。
(2)根据第一表面图像进行像素值对比，得到第一胶纸的粘贴情况(形状和位置)，同理，根据第二表面图像进行像素值对比，得到第二胶纸的粘贴情况(形状和位置)，进而可以判断出第一胶纸和第二胶纸是否粘贴合格。
在此实施例中，通过将第一表面图像中远离极耳侧的背景颜色与第一胶纸的颜色之间的颜色距离设置为大于或等于第一预设值，将第二表面图像中远离极耳侧的背景颜色与第二胶纸的颜色之间的颜色距离大于或等于 第二预设值，使得第一胶纸和第二胶纸分别与对应的背景颜色差异明显，从而，能够根据第一表面图像检测识别出第一胶纸的形状以及相对极片的位置，根据第二表面图像检测识别出第二胶纸的形状以及相对极片的位置，从而，能够准确判断第一胶纸和第二胶纸胶纸是否粘贴合格，进而增加电池的安全性。
其次，绝缘涂层的颜色与第一胶纸的颜色之间的颜色距离大于或等于第四预设值，使得第一胶纸的颜色与绝缘涂层的颜色之间的差异明显，在图像检测时容易识别区分第一胶纸和绝缘涂层；绝缘涂层的颜色与第二胶纸的颜色距离大于或等于第五预设值，使得第二胶纸的颜色与绝缘涂层的颜色之间的差异明显，在图像检测时容易识别区分第二胶纸和绝缘涂层。
最后，通过将第一表面图像中靠近极耳侧的背景颜色与绝缘涂层的颜色之间的颜色距离设置为大于或等于第六预设值，将第二表面图像中靠近极耳的背景颜色与绝缘涂层的颜色之间的颜色距离设置为大于或等于第六预设值，使得第一表面和第二表面上绝缘涂层分别在第一表面图像和第二表面图像中颜色明显，从而，在对第一表面图像进行识别检测时，能够更加准确地抓取绝缘涂层的两个边界，在对第二表面图像进行识别检测时，能够更加准确地抓取绝缘涂层的两个边界。从上述三个方面，可以有效提高胶纸粘合检测的准确性。
根据本申请的一些实施例，请参阅图9，本申请还提供了一种极片表面贴胶检测装置300，包括图像获取模块301和粘贴合格确定模块302。
图像获取模块301用于获取第一表面图像和第二表面图像，其中，第一表面图像包括第一胶纸的图像，第二表面图像包括第二胶纸的图像，第一表面图像中远离极耳侧的背景颜色与第一胶纸的颜色之间的颜色距离大于或等于第一预设值，第二表面图像中远离极耳侧的背景颜色与第二胶纸的颜色之间的颜色距离大于或等于第二预设值。
粘贴合格确定模块，用于根据第一表面图像和第二表面图像，确定第一胶纸和第二胶纸是否粘贴合格。
需要说明的是，图9对应的实施例中未提及的内容可参见上述极片贴胶检测方法实施例的描述，这里不再赘述。
在此实施例中，通过将第一表面图像中远离极耳侧的背景颜色与第一 胶纸的颜色之间的颜色距离设置为大于或等于第一预设值，将第二表面图像中远离极耳侧的背景颜色与第二胶纸的颜色之间的颜色距离大于或等于第二预设值，使得第一胶纸和第二胶纸分别与对应的背景颜色差异明显，从而，能够根据第一表面图像检测识别出第一胶纸的形状以及相对极片的位置，根据第二表面图像检测识别出第二胶纸的形状以及相对极片的位置，从而，能够准确判断第一胶纸和第二胶纸胶纸是否粘贴合格，进而增加电池的安全性。
根据本申请的一些实施例，请参阅图10，本申请还提供了一种极片贴胶检测设备400，极片具有第一表面和第二表面，在极片的预设位置处的第一表面和第二表面分别粘贴有第一胶纸和第二胶纸。
极片贴胶检测设备400包括第一图像采集装置401、第二图像采集装置402、处理器403和存储器404。其中，第一图像采集装置401用于采集第一表面图像，第一表面图像包括第一胶纸的图像，第一表面图像中远离极耳侧的背景颜色与第一胶纸的颜色之间的颜色距离大于或等于第一预设值。第二图像采集装置402用于采集第二表面图像，第二表面图像包括第二胶纸的图像，第二表面图像中远离极耳侧的背景颜色与第二胶纸的颜色之间的颜色距离大于或等于第二预设值。
处理器403分别与第一图像采集装置401和第二图像采集装置402通信连接，以获取第一表面图像和第二表面图像。存储器404与处理器403通信连接，存储器404存储有可被处理器403执行的指令，指令被处理器403执行，以使处理器403能够执行本申请实施例中的极片表面贴胶检测方法。
其中，存储器404可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器404的一部分还可以包括非易失性随机存取存储器(non-volatile random accedd memory，NVRAM)。存储器404存储有操作指令、可执行模块或者数据结构，或者它们的子集，或者它们的扩展集。
处理器403可以是一种集成电路芯片，具有信号的处理能力。在实现过程中，本申请实施例中的极片表面贴胶检测方法的各步骤可以通过处理器403中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器 403可以是通用处理器、数字信号处理器(diginal signal processing，DSP)、微处理器或微控制器，还可进一步包括专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field-programmable gate array，FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。该处理器可实现或者执行本申请实施例中的极片表面贴胶检测方法。
需要说明的是，各个操作的实现还可以对应参照上述极片贴胶检测方法实施例的相应描述；处理器403还可以其他功能硬件配合执行上述极片贴胶检测方法实施例中的其他操作。
根据本申请的一些实施例，本申请还提供了一种极片贴胶机，包括前述极片贴胶检测设备。
在上述实施例中，极片贴胶检测设备能够准确检测设置于极片表面上的胶纸是否粘贴合格。
可以理解的是，在进行极片贴胶检测时，极片贴胶检测设备设置于极片贴胶机周边或机片贴胶机上，与机片贴胶机配合使用，从而，可以将极片贴胶检测设备应用于极片贴胶机，为极片贴胶机提供贴胶检测功能。从而，极片贴胶机包括极片贴胶检测设备的功能。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (13)

  1. 一种极片表面贴胶检测方法，其特征在于，所述极片具有第一表面和第二表面，在所述第一表面和所述第二表面分别粘贴有第一胶纸和第二胶纸；
    所述检测方法包括：
    获取第一表面图像和第二表面图像，其中，所述第一表面图像包括所述第一胶纸的图像，所述第二表面图像包括所述第二胶纸的图像，所述第一表面图像中远离极耳侧的背景颜色与所述第一胶纸的颜色之间的颜色距离大于或等于第一预设值，所述第二表面图像中远离极耳侧的背景颜色与所述第二胶纸的颜色之间的颜色距离大于或等于第二预设值；
    根据所述第一表面图像和所述第二表面图像，确定所述第一胶纸和所述第二胶纸是否粘贴合格。
  2. 根据权利要求1所述的检测方法，其特征在于，所述第一胶纸的颜色和所述第二胶纸的颜色之间的颜色距离大于或等于第三预设值。
  3. 根据权利要求2所述的检测方法，其特征在于，所述第一预设值大于所述第三预设值，所述第二预设值大于所述第三预设值。
  4. 根据权利要求1-3任意一项所述的检测方法，其特征在于，所述第一表面图像中远离极耳侧的背景颜色为白色，和/或，所述第二表面图像中远离极耳侧的背景颜色为白色。
  5. 根据权利要求1-4任意一项所述的检测方法，其特征在于，所述根据所述第一表面图像和所述第二表面图像，确定所述第一胶纸和所述第二胶纸是否粘贴合格，包括：
    根据所述第一表面图像，获取所述第一胶纸远离极耳的第一端至所述极片上远离极耳的涂层边界的第一距离向量；
    根据所述第二表面图像，获取所述第二胶纸远离极耳的第一端至所述极片上远离极耳的涂层边界的第二距离向量；
    根据所述第一距离向量和所述第二距离向量，确定所述第一胶纸和所述第二胶纸是否粘贴合格。
  6. 根据权利要求5所述的检测方法，其特征在于，所述根据所述第一距离向量和所述第二距离向量，确定所述第一胶纸和所述第二胶纸是否粘 贴合格，包括：
    以朝向极耳的方向为正方向，若所述第一距离向量大于0且所述第二距离向量大于0，则确定所述第一胶纸和所述第二胶纸粘贴合格。
  7. 根据权利要求5所述的检测方法，其特征在于，所述根据所述第一距离向量和所述第二距离向量，确定所述第一胶纸和所述第二胶纸是否粘贴合格，包括：
    若所述第一距离向量和所述第二距离向量之间的差的绝对值在预设范围内，则确定所述第一胶纸和所述第二胶纸粘贴合格。
  8. 根据权利要求1所述的检测方法，其特征在于，所述极片上靠近极耳的涂层边界与极耳之间设置有绝缘涂层，所述绝缘涂层的颜色与所述第一胶纸的颜色之间的颜色距离大于或等于第四预设值，所述绝缘涂层的颜色与所述第二胶纸的颜色距离大于或等于第五预设值，所述第一表面图像中靠近极耳侧的背景颜色与所述绝缘涂层的颜色之间的颜色距离大于或等于第六预设值，所述第二表面图像中靠近极耳的背景颜色与所述绝缘涂层的颜色之间的颜色距离大于或等于所述第六预设值；
    所述根据所述第一表面图像和所述第二表面图像，确定所述第一胶纸和所述第二胶纸是否粘贴合格，还包括：
    根据所述第一表面图像，确定所述第一胶纸靠近极耳的第二端是否在所述绝缘涂层靠近极耳的边界和所述绝缘涂层远离极耳的边界之间；
    根据所述第二表面图像，确定所述第二胶纸靠近极耳的第二端是否在所述绝缘涂层靠近极耳的边界和所述绝缘涂层远离极耳的边界之间；
    若所述第一胶纸靠近极耳的第二端在所述绝缘涂层靠近极耳的边界和所述绝缘涂层远离极耳的边界之间、所述第二胶纸靠近极耳的第二端在所述绝缘涂层靠近极耳的边界和所述绝缘涂层远离极耳的边界之间，则确定所述第一胶纸和所述第二胶纸粘贴合格。
  9. 根据权利要求8所述的检测方法，其特征在于，所述第六预设值大于所述第四预设值，和/或，所述第六预设值大于所述第五预设值。
  10. 根据权利要求8或9所述的检测方法，其特征在于，所述第一表面图像中靠近极耳侧的背景颜色为黑色，和/或，所述第二表面图像中靠近极耳侧的背景颜色为黑色。
  11. 一种极片表面贴胶检测装置，其特征在于，包括：
    图像获取模块，用于获取第一表面图像和第二表面图像，其中，所述第一表面图像包括所述第一胶纸的图像，所述第二表面图像包括所述第二胶纸的图像，所述第一表面图像中远离极耳侧的背景颜色与所述第一胶纸的颜色之间的颜色距离大于或等于第一预设值，所述第二表面图像中远离极耳侧的背景颜色与所述第二胶纸的颜色之间的颜色距离大于或等于第二预设值；
    粘贴合格确定模块，用于根据所述第一表面图像和所述第二表面图像，确定所述第一胶纸和所述第二胶纸是否粘贴合格。
  12. 一种极片贴胶检测设备，其特征在于，所述极片具有第一表面和第二表面，在所述极片的预设位置处的第一表面和第二表面分别粘贴有第一胶纸和第二胶纸；
    所述极片贴胶检测设备包括：
    第一图像采集装置，用于采集第一表面图像，所述第一表面图像包括所述第一胶纸的图像，所述第一表面图像中远离极耳侧的背景颜色与所述第一胶纸的颜色之间的颜色距离大于或等于第一预设值；
    第二图像采集装置，用于采集第二表面图像，所述第二表面图像包括所述第二胶纸的图像，所述第二表面图像中远离极耳侧的背景颜色与所述第二胶纸的颜色之间的颜色距离大于或等于第二预设值；
    处理器，所述处理器分别与所述第一图像采集装置和所述第二图像采集装置通信连接，以获取所述第一表面图像和所述第二表面图像；
    存储器，所述存储器与所述处理器通信连接，所述存储器存储有可被所述处理器执行的指令，所述指令被所述处理器执行，以使所述处理器能够执行如权利要求1-10中任意一项所述的方法。
  13. 一种极片贴胶机，其特征在于，包括如权利要求11所述的极片贴胶检测设备。
PCT/CN2022/072117 2022-01-14 2022-01-14 极片表面贴胶检测方法、装置、设备及极片贴胶机 WO2023133836A1 (zh)

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