Film wrapping system and inspection method therefor

Abstract

The present application provides a film wrapping system and an inspection method therefor. The film wrapping system comprises a conveying assembly, a plurality of image acquisition devices, and a superordinate computer; the conveying assembly is used for conveying a dummy battery cell on a conveying path in a film wrapping process when a film wrapping device needs to be inspected; the plurality of image acquisition devices are used for acquiring a target image of a target surface of the dummy battery cell when determining that the dummy battery cell reaches an inspection site on the conveying path in the film wrapping process; and the superordinate computer is used for inspecting the plurality of image acquisition devices on the basis of the target image to obtain inspection results of the plurality of image acquisition devices.

Description

Coating system and inspection method of coating system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202410073848.0, filed on January 18, 2024, entitled “Encapsulation system and inspection method of envelope system,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a membrane coating system and a method for inspecting the membrane coating system. Background Art

[0004] With the development of the electric vehicle industry, battery packs, as a crucial component of electric vehicles, are receiving increasing attention. The quality of battery cells, as a crucial component of battery packs, is also receiving increasing attention. The coating process, a crucial step in battery cell manufacturing, requires spot inspections of the coating system before and after coating. Only after passing these inspections can coating proceed.

[0005] Currently, spot checks on the film coating system during the coating process involve first using an image acquisition device to capture an image of the battery cell. Manual verification is then performed to confirm the grayscale values ​​of the image match those of the film film on the actual battery cell. This comparison is then used to confirm the inspection results. This approach is inefficient for spot checks on the film coating system, and the inspection results are inaccurate.

[0006] Summary of the Invention

[0007] In view of the above problems, the present application provides a membrane coating system and a method for inspecting the membrane coating system to achieve accurate inspection of the membrane coating system.

[0008] In a first aspect, an embodiment of the present application provides a coating system, which includes: a conveying component, multiple image acquisition devices and a host computer; the conveying component is used to convey the profiled battery cell on the conveying path of the coating process when the coating system needs to be inspected; multiple image acquisition devices are used to capture a target image of the target surface of the profiled battery cell when it is determined that the profiled battery cell has arrived at the inspection position in the conveying path of the coating process; the target image includes a first image and a second image; the host computer is used to detect the multiple image acquisition devices based on the target image to obtain detection results of the multiple image acquisition devices; the target surface of the profiled battery cell is provided with a spot inspection piece; the host computer is specifically used to calculate the information to be inspected of the spot inspection piece in any one of the first image and the second image, compare the information to be inspected of the spot inspection piece in the image with the reference spot inspection information of the spot inspection piece to obtain the comparison result of the image, and determine the detection result of the image acquisition device according to the comparison result corresponding to the first image and the comparison result corresponding to the second image.

[0009] In the above technical solution, the coating system includes: a conveyor assembly for conveying the shaped battery cell along the conveyor path of the coating process when the coating system needs to be inspected; multiple image acquisition devices for capturing target images of the target surface of the shaped battery cell upon determining that the shaped battery cell has reached the inspection location in the conveyor path of the coating process; and a host computer for detecting the multiple image acquisition devices based on the target images to obtain detection results from the multiple image acquisition devices. Because the inspection is performed using shaped batteries that resemble the real batteries instead of real batteries, the shaped batteries can be repeatedly photographed without damaging the real batteries. Furthermore, the shaped batteries have a single size, ensuring consistency during each inspection. This eliminates the need for manpower to adjust the image acquisition device's shooting parameters during each inspection, saving manpower. Furthermore, the inspection results are determined by the host computer, eliminating the need for manual verification and improving the accuracy of the inspection results.

[0010] In some embodiments of the present application, multiple image acquisition devices include a first image acquisition device and a second image acquisition device, the inspection site includes a first inspection site and a second inspection site, the first image acquisition device is located at the first inspection site, and the second image acquisition device is located at the second inspection site; the first image acquisition device is used to capture a first image of the first surface of the target surface of the contoured cell before being coated when it is determined that the contoured cell has arrived at the first inspection site; the second image acquisition device is used to capture a second image of the first surface of the contoured cell after being coated when it is determined that the contoured cell has arrived at the second inspection site; wherein, the target surface of the contoured cell is the other surfaces of the contoured cell except the top surface.

[0011] In the above technical solution, when it is determined that the contoured cell has arrived at the first inspection position, the first image acquisition device acquires the first image of the first surface of the target surface of the contoured cell; when the contoured cell has arrived at the second inspection position, the second image acquisition device acquires the second image of the first surface of the contoured cell. In this way, the images of the first surface of the contoured cell at the first inspection position and the second inspection position can be acquired respectively, and then the image acquisition device at the first inspection position and the image acquisition device at the second inspection position can be inspected respectively.

[0012] In some embodiments of the present application, the host computer is also used to send an image acquisition signal to the controller; the system also includes: a controller, used to generate a control instruction when the image acquisition signal is received; and a transmission component, specifically used to transmit the contoured battery cell on the transmission path of the coating process based on the control instruction.

[0013] In the above technical solution, the host computer sends an image acquisition signal to the controller. When the controller receives the image acquisition signal, it generates a control instruction. Then, the conveying component can transmit the contoured battery cell on the conveying path of the coating process based on the control instruction. In this way, the contoured battery cell is transported only when the image acquisition signal is received, saving the loss of the inspection system.

[0014] In some embodiments of the present application, the host computer includes a graphic code, and the host computer is specifically used to send an image acquisition signal to the controller in response to the user's target operation on the target control displayed on the host computer; wherein, the target control is the control displayed on the host computer after the scanning terminal scans the graphic code.

[0015] In the above technical solution, the target control can be displayed by scanning the graphic code using a code scanning terminal, and then an image acquisition signal is sent to the controller in response to the user's target operation on the target control displayed on the host computer. In this way, the user only needs to scan the code to start the inspection program for the coating equipment, thereby improving the efficiency of the inspection.

[0016] In a second aspect, an embodiment of the present application provides a method for inspecting a coating system, the method comprising: upon determining that a contoured cell has arrived at an inspection position in a conveying path of a coating process, obtaining a target image of a target surface of the contoured cell sent by a plurality of image acquisition devices, wherein the target surface of the contoured cell is provided with an inspection piece; the target image comprises a first image and a second image; based on the target image, a plurality of image acquisition devices are detected to obtain inspection results of the plurality of image acquisition devices; the detecting of the plurality of image acquisition devices based on the target image to obtain inspection results of the plurality of image acquisition devices comprises: for any one of the first image and the second image, calculating information to be inspected of the inspection piece in the image; for any one of the first image and the second image, comparing the information to be inspected of the inspection piece in the image with the reference inspection information of the inspection piece to obtain a comparison result of the image; and determining the inspection results of the plurality of image acquisition devices according to the comparison result corresponding to the first image and the comparison result corresponding to the second image.

[0017] In the above technical solution, by determining the inspection position in the conveying path of the contoured battery cell arriving at the coating process, the target images of the target surface of the contoured battery cell sent by multiple image acquisition devices are obtained, and then the multiple image acquisition devices are inspected based on the target images, the inspection results of the multiple image acquisition devices can be obtained. In this way, there is no need for manual inspection, which improves the efficiency and accuracy of the inspection.

[0018] In some embodiments of the present application, multiple image acquisition devices include a first image acquisition device and a second image acquisition device, the inspection site includes a first inspection site and a second inspection site, the first image acquisition device is located at the first inspection site, the second image acquisition device is located at the second inspection site, and the target image includes a first image and a second image; the target surface of the contoured battery cell is the other surfaces of the contoured battery cell except the top surface; obtaining the target images of the target surface of the contoured battery cell sent by multiple image acquisition devices includes: obtaining a first image of the first surface of the target surface of the contoured battery cell before being wrapped, which is collected by the first image acquisition device when it is determined that the contoured battery cell has arrived at the first inspection site, and the first surface is any one of the other surfaces of the contoured battery cell except the top surface; obtaining a second image of the first surface of the contoured battery cell after being wrapped, which is collected by the second image acquisition device when it is determined that the contoured battery cell has arrived at the second inspection site.

[0019] In the above technical solution, by respectively acquiring images of the first surface of the contoured cell at the first inspection location and the second inspection location, the image acquisition device at the first inspection location and the image acquisition device at the second inspection location can be inspected respectively.

[0020] In some embodiments of the present application, the information to be inspected includes grayscale values ​​and size information, and the reference inspection information includes reference grayscale values ​​and reference size information; the information to be inspected of the inspection piece in the image is compared with the reference inspection information of the inspection piece to obtain the image comparison result, including: comparing the grayscale value of the inspection piece in the image with the reference grayscale value of the inspection piece, and comparing the size information of the inspection piece in the image with the reference size information of the inspection piece to obtain the image comparison result.

[0021] In the above technical solution, by comparing the grayscale value of the spot inspection piece in the image with the reference grayscale value of the spot inspection piece, and comparing the size information of the spot inspection piece in the image with the reference size information of the spot inspection piece, the image comparison result can be accurately obtained, thereby realizing accurate detection of the image acquisition device.

[0022] In some embodiments of the present application, the spot inspection film includes at least one area, each area includes a preset graphic; calculating the information to be inspected of the spot inspection film in the image, including: respectively calculating the size information of each preset graphic in the spot inspection film in the image, and the average value of the grayscale value of the target area in at least one area in the spot inspection film in the image, wherein the target area in each area is the area in the area excluding the preset graphic; comparing the grayscale value of the spot inspection film in the image with the reference grayscale value of the spot inspection film, including: determining a first difference between the size information of each preset graphic in the spot inspection film in the image and the reference size information of each preset graphic in the spot inspection film; comparing the size information of the spot inspection film in the image with the reference size information of the spot inspection film, including: determining a second difference between the average value and the average value of the reference grayscale value of the target area in at least one area in the spot inspection film.

[0023] In the above technical solution, by respectively calculating the size information of each preset graphic in the spot inspection film in the image and the average value of the grayscale value of the target area in at least one area in the spot inspection film in the image, and then determining the first difference between the size information of each preset graphic in the spot inspection film in the image and the reference size information of each preset graphic in the spot inspection film, and the second difference between the average value and the average value of the reference grayscale value of the target area in at least one area in the spot inspection film, the information to be inspected in the spot inspection film in the image can be accurately compared with the reference inspection information of the spot inspection film, and the comparison result of the image can be accurately obtained.

[0024] In some embodiments of the present application, the detection results of multiple image acquisition devices are determined based on the comparison results corresponding to the first image and the comparison results corresponding to the second image, including: for the comparison results of any one of the first image and the second image, when it is determined that the comparison result is that the first difference is less than the first preset difference threshold, and the second difference is less than the second preset difference threshold, the detection result of the image acquisition device corresponding to the image is determined to be a passed detection; when it is determined that the comparison result is that the first difference is not less than the first preset difference threshold, and / or the comparison result is that the second difference is not less than the second preset difference threshold, the detection result of the image acquisition device corresponding to the image is determined to be a failed detection.

[0025] In the above technical solution, for the first difference and the second difference calculated based on the image captured by any image acquisition device, based on the relationship between the first difference and the first preset difference threshold, and the second difference and the second preset difference threshold, it can be accurately determined whether the detection of the image acquisition device has passed.

[0026] In some embodiments of the present application, after determining that the comparison result is that the first difference is not less than the first preset difference threshold, the method further includes: outputting adjustment information of the target object so that after the target object is adjusted, the comparison result is that the first difference is less than the first preset difference threshold and the second difference is less than the second preset difference threshold; wherein the target object includes at least one of the following: the position of the contoured battery cell; the position of multiple image acquisition devices; and the light sources corresponding to the multiple image acquisition devices.

[0027] In the above technical solution, after determining that the comparison result is that the first difference is not less than the first preset difference threshold, the adjustment information of the target object can also be output, so that after the target object is adjusted, the comparison result corresponding to the first image is that the first difference is less than the first preset difference threshold and the comparison result corresponding to the second image is that the second difference is less than the second preset difference threshold. In this way, the image acquisition device can be detected by continuously adjusting the target object, thereby improving the detection accuracy of the image acquisition device.

[0028] In some embodiments of the present application, when it is determined that the comparison result is that the second difference is not less than the second preset difference threshold, the detection result of the image acquisition device corresponding to the image is determined to be a detection failure, including: when it is determined that the comparison result is that the second difference is not less than the second preset difference threshold, returning to execute the step of calculating the grayscale value and size information of the spot inspection piece based on the spot inspection piece in the image, comparing the grayscale value with the reference grayscale value of the spot inspection piece, and comparing the size information with the reference size information of the spot inspection piece to obtain the comparison result; when it is determined that the comparison result is that the second difference is not less than the second preset difference threshold the number of times reaches the preset number, determining that the detection result of the image acquisition corresponding to the image is a detection failure.

[0029] In the above technical solution, when it is determined that the comparison result is that the second difference is not less than the second preset difference threshold, repeated inspections can be performed to determine whether the second difference is not less than the second preset difference threshold, thereby improving the detection accuracy of the image acquisition device.

[0030] In some embodiments of the present application, obtaining a first image of the first surface of the target surface of the profiled cell, which is collected when the profiled cell is determined to have arrived at the first inspection location and sent by the first image acquisition device, includes: obtaining a first sub-image and a second sub-image of the first surface of the target surface of the profiled cell, which are collected when the profiled cell is determined to have arrived at the first inspection location and sent by the first image acquisition device, wherein the first sub-image and the second sub-image both include partial areas of the first surface, and the partial area of ​​the first surface in the first sub-image and the partial area of ​​the first surface in the second sub-image constitute the entire area of ​​the target surface; and fusing the first sub-image and the second sub-image to obtain a first image.

[0031] In the above technical solution, by obtaining the first sub-image and the second sub-image of the first surface of the target surface of the profiled battery cell sent by the first image acquisition device when it is determined that the profiled battery cell has arrived at the first inspection position, the first sub-image and the second sub-image are fused to obtain the first image. In this way, the first surface can occupy a relatively large area in the first image, which is convenient for calculation of the first image, improves the size information of the preset graphics in the first image, and improves the calculation accuracy of the average grayscale value of the target area, thereby improving the detection accuracy of the image acquisition device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0033] FIG1 is a schematic structural diagram of a spot inspection system for a film coating device provided in one embodiment of the present application;

[0034] FIG2 is a schematic diagram of a coating process according to an embodiment of the present application;

[0035] FIG3 is a schematic structural diagram of a contoured battery cell provided in one embodiment of the present application;

[0036] FIG4 is a schematic diagram of a configuration of an image acquisition device according to an embodiment of the present application;

[0037] FIG5 is a schematic flow chart of a method for inspecting a film coating device according to an embodiment of the present application;

[0038] FIG6 is a schematic flow chart of a method for inspecting a film coating device according to an embodiment of the present application;

[0039] FIG7 is a schematic flow chart of a method for inspecting a film coating device according to an embodiment of the present application;

[0040] FIG8 is a schematic flow chart of a method for inspecting a film coating device according to another embodiment of the present application;

[0041] FIG9 is a flow chart of a method for inspecting a film coating device according to another embodiment of the present application. DETAILED DESCRIPTION

[0042] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0043] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0045] In addition, the technical terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0046] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0047] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0048] Before introducing the technical solutions of the embodiments of the present application, the background technology of the embodiments of the present application is first introduced:

[0049] The current process for spot inspections of the coating system is as follows: an image of the actual battery cell is acquired using an image acquisition device. The grayscale values ​​of the image are then manually verified at fixed intervals to ensure consistency with the grayscale values ​​of the film on the actual battery cell. The inspection results of the coating system are then confirmed based on the comparison results. Because each side of the battery cell must be photographed, meaning the actual battery cell must be photographed repeatedly and manually verified, the above solution is inefficient for spot inspections of the coating system, and the inspection results are inaccurate. Furthermore, because the battery cells used for inspection are different each time, and the size of each cell is different, professionals are required to adjust the shooting parameters of the image acquisition device each time the cell is photographed. Only after the adjustments are completed can the inspection be performed. This increases labor costs and results in a decrease in the consistency of each inspection.

[0050] To address the aforementioned issues, embodiments of the present application provide a coating system and a method for inspecting the coating system. The coating system includes: a conveyor assembly for conveying a profiled cell along a conveyor path of a coating process when the coating system needs to be inspected; multiple image acquisition devices for capturing target images of target surfaces of the profiled cell upon determining that the profiled cell has reached an inspection location in the conveyor path of the coating process; and a host computer for inspecting the multiple image acquisition devices based on the target images to obtain inspection results from the multiple image acquisition devices. Because the inspection uses profiled cells that resemble the real cells instead of real cells, the profiled cells can be repeatedly photographed without damaging the real cells. Furthermore, the profiled cells have a single size, ensuring consistency across inspections. This eliminates the need for labor-intensive adjustments to the image acquisition device's shooting parameters during each inspection, saving labor. Furthermore, the inspection results are determined by the host computer, eliminating the need for manual verification and improving the accuracy of the inspection results.

[0051] The encapsulation system provided in the embodiment of the present application is described in detail below with reference to FIG1 .

[0052] FIG1 shows a schematic structural diagram of a film encapsulation system provided by one embodiment of the present application. The film encapsulation system may specifically include a transmission component 110 , a plurality of image acquisition devices 120 and a host computer 130 .

[0053] The conveyor assembly 110 is used to convey the shaped battery cells on the conveying path of the coating process when the coating system needs to be inspected;

[0054] A plurality of image acquisition devices 120 for acquiring target images of target surfaces of the profiling cells when it is determined that the profiling cells have reached a spot inspection location in a conveying path of the coating process;

[0055] The host computer 130 is configured to detect multiple image acquisition devices based on the target image and obtain detection results of the multiple image acquisition devices.

[0056] The coating process can be a process of coating the battery cells in the battery cell manufacturing process. The specific coating process can be shown in Figure 2. In the upper half of Figure 2, the direction indicated by the arrow is the logistics direction of the coating process. First, the material is loaded and buffered at station A, the core is loaded and assembled at station B, then the coating is hot-melted at station C, the glue is applied at station D, the shell is inserted at station E, and finally the material is unloaded at station F.

[0057] The stencil cell can be a cell made by imitating a real cell. The appearance of the stencil cell is completely consistent with the real cell. The stencil cell can be understood as a structure that has the same appearance as the real cell but is hollow inside, as shown in FIG3 .

[0058] It should be noted that, referring to FIG3 , the shaped cell may be a rectangular parallelepiped structure, and the top surface of the shaped cell may include a fixing member 31 , which may be used to fix the top surface 32 . The top surface 32 of the shaped cell may be detachable. As shown in FIG3 , there may be multiple fixing members 31 .

[0059] The image acquisition device may be a device for performing image acquisition, such as a camera.

[0060] The inspection site may be a site where the coating equipment needs to be inspected, and the site may be site G and site H in FIG2 , that is, there is an inspection site before and after the workstation C respectively.

[0061] The target surface may be the surface of the profiled cell to be collected, and specifically may be the other surfaces of the profiled cell except the top surface, ie, the other five surfaces except the top surface 32 in FIG. 3 .

[0062] It should be noted that when collecting images of the other five surfaces except the top surface 32, each surface has a corresponding image acquisition device, so the image collected from each surface can be used to detect the image acquisition device corresponding to the surface.

[0063] Specifically, for each surface to be captured, the corresponding image capture device configuration is shown in FIG4 . In FIG4 , the side camera M and the side camera N are respectively used to capture the two side surfaces of the profiled cell P, namely, side surface 33 in FIG3 and the other side surface opposite side surface 33 (not shown in the figure). For example, the side camera M may be used to capture an image of side surface 33, and the side camera N may be used to capture an image of the other side surface opposite side surface 33. The two large-surface cameras 43 are respectively used to capture the two large surfaces of the profiled cell P, namely, large surface 34 in FIG3 and the other large surface surface opposite large surface 34 (not shown in the figure). For example, one large-surface camera 43 may be used to capture an image of large surface 34, and the other large-surface camera 43 may be used to capture an image of the other large surface opposite large surface 34. The bottom camera 44 is used to capture the bottom surface of the profiled cell P in FIG3 , namely, the other surface opposite top surface 32 (not shown in the figure).

[0064] It should be noted that the side cameras K and L in FIG4 capture two side surfaces of another contoured battery cell Q that is different from the contoured battery cell P.

[0065] Continuing with reference to FIG2 , the lower half of FIG2 is a top view of the upper half of FIG2 , wherein 20 is a magnetic levitation guide rail, which is equivalent to a conveying assembly. The side camera M and the side camera N in station G in FIG2 are respectively used to photograph the two side faces of the contoured cell P, and the two large-surface cameras 43 are respectively used to photograph the two large faces of the contoured cell P. Correspondingly, the side camera M and the side camera N in station H in FIG2 are respectively used to photograph the two side faces of the contoured cell Q, and the two large-surface cameras 43 are respectively used to photograph the two large faces of the contoured cell Q. In FIG2 , the bottom cameras in stations G and H are not shown because they are obscured by their corresponding side cameras. Taking station G as an example, the bottom camera in station G is obscured by the side camera M and is therefore not shown.

[0066] In addition, it should be noted that, in FIG2 , the magnetic levitation guide rail is controlled by a controller 21 , and the controller 21 is connected to a host computer 22 . The specific functions of the controller 21 and the host computer 22 will be described in detail later.

[0067] In an embodiment of the present application, the coating system includes: a conveyor assembly for conveying a profiled cell along a conveyor path of the coating process when a spot inspection of the coating equipment is required; multiple image acquisition devices for capturing target images of a target surface of the profiled cell upon determining that the profiled cell has reached an inspection location in the conveyor path of the coating process; and a host computer for detecting the multiple image acquisition devices based on the target images to obtain detection results from the multiple image acquisition devices. Because the spot inspection uses profiled cells that resemble the real cells instead of real cells, the profiled cells can be repeatedly photographed without damaging the real cells. Furthermore, the profiled cells have only one size, ensuring consistency during each spot inspection. This eliminates the need for labor-intensive adjustments to the image acquisition device's shooting parameters during each spot inspection, saving labor. Furthermore, the spot inspection results are determined by the host computer, eliminating the need for manual verification and improving the accuracy of the spot inspection results.

[0068] In some embodiments of the present application, the plurality of image acquisition devices include a first image acquisition device and a second image acquisition device, the inspection location includes a first inspection location and a second inspection location, the first image acquisition device is located at the first inspection location, the second image acquisition device is located at the second inspection location, and the target image includes a first image and a second image;

[0069] A first image acquisition device is used to acquire a first image of a first surface of a target surface of the profiling cell before being coated when it is determined that the profiling cell has arrived at the first inspection location;

[0070] The second image acquisition device is used to acquire a second image of the first surface of the contoured battery cell after being wrapped when it is determined that the contoured battery cell has arrived at the second inspection location.

[0071] There may be at least one first image acquisition device and at least one second image acquisition device.

[0072] The first inspection site and the second inspection site may be two sites before and after the encapsulation, respectively. For example, the first inspection site and the second inspection site may be the workstation G and the workstation H in FIG. 2 , respectively.

[0073] The first image may be an image of the profiled cell captured at the first inspection location, i.e., an image of the profiled cell captured before encapsulation. The second image may be an image of the profiled cell captured at the second inspection location, i.e., an image of the profiled cell captured after encapsulation.

[0074] The first surface may be any surface among the target surfaces, that is, the first surface may be any surface except the top surface of the contoured battery cell.

[0075] In some embodiments of the present application, when it is determined that the contoured battery cell has arrived at the first inspection location, a first image acquisition device can be used to capture a first image of the first surface of the target surface of the contoured battery cell before being wrapped, and when the contoured battery cell has arrived at the second inspection location, a second image acquisition device can be used to capture a second image of the first surface of the contoured battery cell after being wrapped.

[0076] It should be noted that multiple image acquisition devices for capturing target images of the target surface are respectively provided at the first inspection site and the second inspection site. The settings of the image acquisition devices at the first inspection site and the second inspection site are as shown in Figure 4, that is, the first inspection site and the second inspection site are both provided with two side cameras, two large-surface cameras and one bottom camera, that is, the setting method of the image acquisition device at the first inspection site and the setting method of the image acquisition device at the second inspection site are consistent.

[0077] In an embodiment of the present application, when it is determined that the contoured cell has arrived at the first inspection position, the first image acquisition device captures the first image of the target surface of the contoured cell before being coated. When the contoured cell has arrived at the second inspection position, the second image acquisition device captures the second image of the first surface of the contoured cell after being coated. In this way, the images of the first surface of the contoured cell at the first inspection position and the second inspection position can be captured respectively, and then the image acquisition device at the first inspection position and the image acquisition device at the second inspection position can be inspected respectively.

[0078] In some embodiments of the present application, a spot inspection sheet is provided on the target surface of the profiling cell, that is, a spot inspection sheet is provided on all five surfaces of the profiling cell except the top surface, such as the spot inspection sheet 35 in Figure 3. The spot inspection sheet here can be a structure for spot inspection, for example, a film sheet.

[0079] The host computer is specifically used to calculate the information to be inspected of the inspection piece in the image for any one of the first image and the second image, compare the information to be inspected of the inspection piece in the image with the reference inspection information of the inspection piece to obtain the comparison result of the image, and determine the detection result of the image acquisition device based on the comparison result corresponding to the first image and the comparison result corresponding to the second image.

[0080] The information to be inspected may be information to be inspected, and specifically may be grayscale value and size information of a film.

[0081] The reference inspection information may be reference information for comparison with the information to be inspected. The reference inspection information may be a preset reference standard for the information to be inspected. The reference inspection information may be reference grayscale value and reference size information of the film.

[0082] In some embodiments of the present application, for any one of the first image and the second image, the information to be inspected of the film in the image can be compared with the reference inspection information of the inspection film to obtain the image comparison result, and the detection result of the image acquisition device can be determined based on the comparison result corresponding to the first image and the comparison result corresponding to the second image. Specifically, how to compare the information to be inspected of the film in the image with the reference inspection information of the inspection film to obtain the image comparison result, and how to determine the detection result of the image acquisition device based on the comparison result corresponding to the first image and the comparison result corresponding to the second image will be introduced in detail in the following embodiments.

[0083] In an embodiment of the present application, for any one of the first image and the second image, the information to be inspected in the inspection film in the image can be compared with the reference inspection information of the inspection film to obtain the image comparison result, and then the detection result of the image acquisition device can be accurately determined based on the comparison result corresponding to the first image and the comparison result corresponding to the second image.

[0084] In some embodiments of the present application, the host computer is further configured to send an image acquisition signal to the controller;

[0085] The above-mentioned system may further include:

[0086] A controller, configured to generate a control instruction upon receiving an image acquisition signal;

[0087] The conveying component is specifically used to transport the shaped battery cells on the conveying path of the coating process based on control instructions.

[0088] The image acquisition signal may be a signal for prompting the user to acquire an image of the profiling cell. The image acquisition signal may be generated by a host computer. The specific generation method will be described in detail in the following embodiments.

[0089] The control instruction may be an instruction generated by the controller when the image acquisition signal is received and used to control the transportation of the contoured battery cell.

[0090] In an embodiment of the present application, the host computer sends an image acquisition signal to the controller, and the controller generates a control instruction when receiving the image acquisition signal. Then, the conveying component can transmit the contoured battery cell on the conveying path of the coating process based on the control instruction. In this way, the contoured battery cell is transported only when the image acquisition signal is received, saving the loss of the inspection system.

[0091] In some embodiments of the present application, the host computer may include a graphic code. After the user scans the graphic code using a code scanning terminal, a target control can be displayed on the host computer. The host computer is then specifically used to send an image acquisition signal to the controller in response to the user's target operation on the target control displayed on the host computer.

[0092] The graphic code may be a QR code, and the scanning terminal may be, but is not limited to, a personal computer (PC), a smart phone, a tablet computer, or a personal digital assistant (PDA).

[0093] The target control may be a control generated after scanning the image code.

[0094] The target operation may be an operation performed on the target control, and the target operation may be, for example, a click operation.

[0095] In some embodiments of the present application, the user can use a code scanning terminal to scan a graphic code displayed on the host computer, and then display a target control on the host computer. The user then clicks the target control to generate an image acquisition signal and send the image acquisition signal to the controller.

[0096] In an embodiment of the present application, the target control can be displayed by scanning a graphic code using a code scanning terminal, and then an image acquisition signal is sent to the controller in response to the user's target operation on the target control displayed on the host computer. In this way, the user only needs to scan the code to start the inspection program for the coating equipment, thereby improving the efficiency of the inspection.

[0097] Based on the same inventive concept as the above-mentioned coating system, an embodiment of the present application also provides a method for inspecting a coating system. The coating system here is the coating system shown in Figure 1 in the above-mentioned embodiment. Figure 5 shows a flow chart of a method for inspecting a coating system provided by an embodiment of the present application. The method for inspecting the coating system can be applied to the host computer in the above-mentioned coating system. As shown in Figure 5, the method for inspecting the coating system can specifically include steps 510-520.

[0098] It should be noted that the professional terms involved in the embodiments of the present application and those in the above embodiments have the same meanings and will not be repeated here.

[0099] Step 510 : When it is determined that the contoured cell has reached the inspection position in the conveying path of the coating process, target images of the target surface of the contoured cell sent by multiple image acquisition devices are acquired.

[0100] Step 520: Detect multiple image acquisition devices based on the target image to obtain detection results of the multiple image acquisition devices.

[0101] In an embodiment of the present application, by determining the inspection position in the conveying path of the contoured battery cell arriving at the coating process, obtaining the target image of the target surface of the contoured battery cell sent by multiple image acquisition devices, and then inspecting the multiple image acquisition devices based on the target image, the inspection results of the multiple image acquisition devices can be obtained. In this way, there is no need for manual inspection, which improves the efficiency and accuracy of the inspection.

[0102] In some embodiments of the present application, the multiple image acquisition devices include a first image acquisition device and a second image acquisition device, the inspection location includes a first inspection location and a second inspection location, the first image acquisition device is located at the first inspection location, the second image acquisition device is located at the second inspection location, and the target image includes a first image and a second image.

[0103] Referring to FIG6 , step 510 may specifically include steps 5101 and 5102:

[0104] Step 5101: Acquire a first image of a first surface of a target surface of a contoured cell before being coated, which is sent by a first image acquisition device and is acquired when it is determined that the contoured cell has arrived at a first inspection location.

[0105] Step 5102: Obtain a second image of the first surface of the contoured cell after being coated, which is sent by a second image acquisition device when it is determined that the contoured cell has arrived at a second inspection location.

[0106] In an embodiment of the present application, by respectively acquiring images of the first surface of the contoured cell at the first inspection location and the second inspection location, the image acquisition device at the first inspection location and the image acquisition device at the second inspection location can be inspected respectively.

[0107] When using an image acquisition device to capture an image of a certain surface of a contoured battery cell, it is necessary to determine the area occupied by that surface in the image to facilitate subsequent calculation of the size information of a preset pattern based on the image. However, due to the large size of the contoured battery cell or the camera's inherent shooting capabilities, if the entire surface is captured in one image, the area occupied by that surface in the image is relatively small, making subsequent calculations inconvenient.

[0108] To solve the above problem, step 5101 may specifically include:

[0109] Acquire a first sub-image and a second sub-image of a first surface of a target surface of the profiled battery cell, which are captured by the first image capture device when it is determined that the profiled battery cell has reached a first inspection location;

[0110] The first sub-image and the second sub-image are fused to obtain a first image.

[0111] Among them, the first sub-image and the second sub-image can be images of the first surface taken, and the first sub-image and the second sub-image can both include partial areas of the first surface, and the partial area of ​​the first surface in the first sub-image and the partial area of ​​the first surface in the second sub-image constitute the entire area of ​​the first surface.

[0112] In some embodiments of the present application, when photographing the first surface, two images are taken of the first surface, each image contains a partial area of ​​the first surface, for example, both images may still contain two-thirds of the first surface, and then the two images can be spliced ​​into the complete area of ​​the first surface.

[0113] In one example, continuing to refer to Figures 3 and 4, taking the image of the side 33 as an example, the side camera M can take two images of the side 33, namely Image 1 and Image 2. Image 1 has two-thirds of the side 33, and Image 2 has two-thirds of the side 33. The side in Image 1 and the side in Image 2 can be spliced ​​into a complete side 33.

[0114] In some embodiments of the present application, for other surfaces in the target surface, the corresponding images can also be obtained in the same manner as the first surface described above, which will not be repeated here.

[0115] In an embodiment of the present application, by obtaining the first sub-image and the second sub-image of the first surface of the target surface of the profiled battery cell sent by the first image acquisition device when it is determined that the profiled battery cell has arrived at the first inspection position, the first sub-image and the second sub-image are fused to obtain a first image. In this way, the first surface can occupy a relatively large area in the first image, which facilitates calculation of the first image, improves the size information of the preset graphics in the first image, and improves the calculation accuracy of the average grayscale value of the target area, thereby improving the detection accuracy of the image acquisition device.

[0116] In some embodiments of the present application, a detection piece is provided on the target surface of the contoured battery cell.

[0117] Referring to FIG. 7 , step 520 may specifically include steps 5201 to 5203:

[0118] Step 5201: For any one of the first image and the second image, calculate the information to be inspected of the inspection slice in the image.

[0119] Step 5202: For any one of the first image and the second image, compare the information to be inspected of the inspection piece in the image with the reference inspection information of the inspection piece to obtain an image comparison result.

[0120] Step 5203: Determine detection results of multiple image acquisition devices based on the comparison result corresponding to the first image and the comparison result corresponding to the second image.

[0121] In an embodiment of the present application, for any one of the first image and the second image, the information to be inspected in the inspection film in the image can be compared with the reference inspection information of the inspection film to obtain the image comparison result, and then the detection result of the image acquisition device can be accurately determined based on the comparison result corresponding to the first image and the comparison result corresponding to the second image.

[0122] In some embodiments of the present application, the information to be inspected may include grayscale values ​​and size information, and the reference inspection information may include reference grayscale values ​​and reference size information.

[0123] Step 5202 may specifically include:

[0124] The grayscale value of the spot inspection piece in the image is compared with the reference grayscale value of the spot inspection piece, and the size information of the spot inspection piece in the image is compared with the reference size information of the spot inspection piece to obtain the comparison result of the image.

[0125] In an embodiment of the present application, by comparing the grayscale value of the spot inspection piece in the image with the reference grayscale value of the spot inspection piece, and comparing the size information of the spot inspection piece in the image with the reference size information of the spot inspection piece, the image comparison result can be accurately obtained, thereby achieving accurate detection of the image acquisition device.

[0126] In some embodiments of the present application, the inspection sheet may include at least one area, and each area may include a preset pattern, which may be, but is not limited to, a square, a rectangle, a circle, or a sector.

[0127] In one example, continuing to refer to FIG3 , taking the preset graphic as a circle as an example, the inspection sheet 35 includes four areas, namely area A, area B, area C and area D, and each of area A, area B, area C and area D has a circle.

[0128] Step 5201 may specifically include:

[0129] Calculating the size information of each preset graphic in the spot inspection slice in the image and the average value of the grayscale value of the target area in at least one area in the spot inspection slice in the image respectively;

[0130] The comparing the grayscale value of the spot inspection piece in the image with the reference grayscale value of the spot inspection piece may specifically include:

[0131] Determine a first difference between size information of each preset pattern in the spot inspection film and reference size information of each preset pattern in the spot inspection film in the image;

[0132] The comparing the size information of the spot inspection piece in the image with the reference size information of the spot inspection piece may specifically include:

[0133] A second difference between the average value and the average value of the reference grayscale value of the target area in at least one area of ​​the spot inspection film is determined.

[0134] In some embodiments of the present application, for each preset graphic, the size information of the preset graphic may be calculated, and specifically, the size information of the preset graphic may be measured using a measuring tool.

[0135] For each preset graphic, the first difference may be a difference between size information of the preset graphic and reference size information.

[0136] It should be noted that, for the film, the grayscale value of each area of ​​the film and the size information of the preset graphics on the film are all pre-set, that is, the above-mentioned reference size information and reference grayscale value are both known.

[0137] In some embodiments of the present application, after measuring the size information of each preset graphic, for the preset graphic in any area, the measured size information of the preset graphic in the area can be subtracted from the reference size information of the preset graphic in the area to obtain a first difference.

[0138] In one example, continuing to refer to FIG. 3 , taking region A as an example, after the size information of a circle in region A is measured and obtained, the difference between the size information and the reference size information of the circle may be used as the first difference.

[0139] Similarly, by using the same calculation method as the first difference between the size information of the measured circle in area A and the reference size information of the circle, the first difference between the size information of the measured circle in area B, area C and area D and the reference size information of the circle can be obtained respectively, which will not be repeated here.

[0140] For any area, the target area of ​​the area can be other areas in the area except the preset graphics. As shown in FIG3 , taking area A as an example, the target area of ​​area A is other areas in the area A except the circle.

[0141] The second difference value may be a difference between an average value of grayscale values ​​of the target area in at least one area in the spot inspection patch in the image and an average value of reference grayscale values ​​of the target area in at least one area in the spot inspection patch.

[0142] In some embodiments of the present application, the average grayscale value of the target area of ​​at least one area in the spot inspection film may be the average grayscale value of the target area of ​​each area in the spot inspection film, or the average grayscale value of the target area of ​​these multiple areas.

[0143] In one example, continuing to refer to Figure 3, the average value of the grayscale value of the target area of ​​at least one area in the spot inspection film can be the average value of the grayscale value of the target area of ​​each area in area A, area B, area C and area D, that is, the average value of the grayscale value of the target area of ​​at least one area in the spot inspection film is multiple, namely the average value of the grayscale value of the target area of ​​area A, the average value of the grayscale value of the target area of ​​area B, the average value of the grayscale value of the target area of ​​area C and the average value of the grayscale value of the target area of ​​area D.

[0144] The average grayscale value of the target area of ​​at least one area in the spot inspection film may also be the average grayscale value of the target areas of four areas: area A, area B, area C, and area D. The average grayscale value of the target area of ​​at least one area in the spot inspection film is one.

[0145] For example, the average grayscale value of the target area in area A is 132, the average grayscale value of the target area in area B is 135, the average grayscale value of the target area in area C is 130, and the average grayscale value of the target area in area D is 137. Then the average grayscale value of the target area in at least one area in the inspection film can be 132, 135, 130 and 137, or (132+135+130+137) / 4=133.5.

[0146] In some embodiments of the present application, when the average value of the grayscale value of the target area in at least one area in the spot inspection film is the average value of the grayscale value of the target area in each area in the spot inspection film, each area has a corresponding second difference value. For a certain area, the second difference value of the area is the difference between the average value of the grayscale value of the target area of ​​the area and the reference grayscale value of the area.

[0147] When the average value of the grayscale value of the target area in at least one area in the inspection film is the average value of the grayscale values ​​of the target areas of these multiple areas, the second difference is the difference between the average value of the grayscale values ​​of the target areas of these multiple areas and the average value of the reference grayscale values ​​of the target areas of these multiple areas.

[0148] In an embodiment of the present application, by respectively calculating the size information of each preset graphic in the spot inspection film in the image and the average value of the grayscale value of the target area in at least one area in the spot inspection film in the image, and then determining the first difference between the size information of each preset graphic in the spot inspection film in the image and the reference size information of each preset graphic in the spot inspection film, and the second difference between the average value and the average value of the reference grayscale value of the target area in at least one area in the spot inspection film, the information to be inspected in the spot inspection film in the image can be accurately compared with the reference inspection information of the spot inspection film, and the comparison result of the image can be accurately obtained.

[0149] In some embodiments of the present application, step 5203 may specifically include:

[0150] For the comparison result of either the first image or the second image, if it is determined that the first difference is less than a first preset difference threshold and the second difference is less than a second preset difference threshold, determining that the detection result of the image acquisition device corresponding to the image is a passed detection;

[0151] When it is determined that the comparison result is that the first difference is not less than the first preset difference threshold, and / or the comparison result is that the second difference is not less than the second preset difference threshold, the detection result of the image acquisition device corresponding to the image is determined to be detection failure.

[0152] The first preset difference threshold may be a preset threshold value of the first difference. The second preset difference threshold may be a preset threshold value of the second difference. The first preset difference threshold and the second preset difference threshold may both be set according to user needs and are not limited in the embodiments of the present application.

[0153] In some embodiments of the present application, for either the first image or the second image, if the comparison result corresponding to the image is that the first difference is less than a first preset difference threshold, and the second difference is less than a second preset difference threshold, then it is determined that the image acquisition device that acquired the image has passed the inspection. If the comparison result corresponding to the image is that the first difference is not less than the first preset difference threshold, and / or the second difference is not less than the second preset difference threshold, then it is determined that the image acquisition device that acquired the image has failed the inspection.

[0154] In one example, with continued reference to Figures 2, 3, and 4, several cameras are provided at station G in Figure 2, as shown in Figure 4. A side camera M is used to capture an image of side 33, and a side camera N is used to capture an image of another side opposite side 33. If the comparison result of the captured image of side 33 is that the first difference is less than a first preset difference threshold, and the second difference is less than a second preset difference threshold, then the inspection by side camera M is determined to have passed. If the comparison result of the captured image of side 33 is that the first difference is not less than the first preset difference threshold, and / or the second difference is not less than the second preset difference threshold, then the inspection by side camera M is determined to have failed.

[0155] In an embodiment of the present application, for the first difference and the second difference calculated based on the image captured by any image acquisition device, based on the relationship between the first difference and the first preset difference threshold, and the second difference and the second preset difference threshold, it can be accurately determined whether the detection of the image acquisition device has passed.

[0156] In some embodiments of the present application, after determining that the comparison result is that the first difference is not less than the first preset difference threshold, the above method further includes:

[0157] Adjustment information of the target object is outputted so that after the target object is adjusted, the comparison result corresponding to the first image is that the first difference is less than the first preset difference threshold and the comparison result corresponding to the second image is that the second difference is less than the second preset difference threshold.

[0158] The target object may be an object for adjustment, and the target object may include at least one of the following:

[0159] Position of the contoured cell;

[0160] the locations of multiple image acquisition devices;

[0161] Light sources corresponding to multiple image acquisition devices.

[0162] In some embodiments of the present application, if it is determined that the comparison result is that the first difference is not less than the first preset difference threshold, it may be that the image acquisition device or the contour cell is placed crookedly, or the light source of the image acquisition device is not very good, then the adjustment information of the target object can be output, specifically, the position of the contour cell, the positions of multiple image acquisition devices, and the light sources corresponding to the multiple image acquisition devices can be adjusted.

[0163] It should be noted that when adjusting the positions of multiple image capture devices, it is possible to adjust only the positions of image capture devices whose comparison results show a first difference value not less than the first preset difference threshold, without adjusting the positions of every image capture device. Similarly, when adjusting the light sources of multiple image capture devices, it is possible to adjust only the light sources of image capture devices whose comparison results show a first difference value not less than the first preset difference threshold, without adjusting the light sources of every image capture device.

[0164] In an embodiment of the present application, after determining that the comparison result is that the first difference is not less than the first preset difference threshold, adjustment information of the target object can also be output, so that after the target object is adjusted, the comparison result corresponding to the first image is that the first difference is less than the first preset difference threshold and the comparison result corresponding to the second image is that the second difference is less than the second preset difference threshold. In this way, the image acquisition device can be detected by continuously adjusting the target object, thereby improving the detection accuracy of the image acquisition device.

[0165] In some embodiments of the present application, when it is determined that the comparison result shows that the second difference is not less than the second preset difference threshold, determining that the detection result of the image acquisition device corresponding to the image is a detection failure may specifically include:

[0166] If it is determined that the comparison result shows that the second difference is not less than the second preset difference threshold, returning to the step of calculating the grayscale value and size information of the spot inspection piece based on the spot inspection piece in the image, comparing the grayscale value with the reference grayscale value of the spot inspection piece, and comparing the size information with the reference size information of the spot inspection piece to obtain a comparison result;

[0167] When it is determined that the comparison result shows that the second difference is not less than the second preset difference threshold value a number of times reaching a preset number, the detection result of the image acquisition corresponding to the image is determined to be detection failure.

[0168] Among them, the preset number of times can be a preset threshold for the number of times the comparison result is determined to be the second difference not less than the second preset difference threshold. The preset number of times can be set according to user needs and is not limited in the embodiment of this application.

[0169] In some embodiments of the present application, when it is determined that the comparison result of a certain image is that the second difference is not less than the second preset difference threshold, the grayscale value and size information of the spot inspection piece are recalculated based on the spot inspection piece in the image, the grayscale value is compared with the reference grayscale value of the spot inspection piece, and the size information is compared with the reference size information of the spot inspection piece to obtain a comparison result. If the number of spot inspections reaches the preset number of times and the result of each spot inspection is that the second difference is not less than the second preset difference threshold, it can be determined that the detection result of the image acquisition corresponding to the image is that the detection failed.

[0170] In an embodiment of the present application, when it is determined that the comparison result is that the second difference is not less than the second preset difference threshold, repeated inspections can be performed to determine whether the second difference is not less than the second preset difference threshold, thereby improving the detection accuracy of the image acquisition device.

[0171] In some embodiments of the present application, in order to facilitate a clear understanding of the inspection method of the coating system provided in the embodiments of the present application, another implementable method of the inspection method of the coating system provided in the embodiments of the present application is provided, as shown in Figure 8, and the inspection method of the coating system includes steps 810-880.

[0172] Step 810: Place the contoured battery cell.

[0173] Step 820: Pass through the inspection points in sequence.

[0174] In step 820 , the shaped battery cell may be transported by a conveying assembly through a first inspection location and a second inspection location in sequence.

[0175] Step 830: trigger the image acquisition device to take a photo.

[0176] When it is determined that the contoured cell reaches the first inspection position, the first image acquisition device is triggered to capture the first image of the target surface of the contoured cell. When it is determined that the contoured cell reaches the second inspection position, the second image acquisition device is triggered to capture the second image of the target surface of the contoured cell.

[0177] Step 840: Inspection completed.

[0178] Step 850 , determine whether the inspection has passed. If not, execute step 860 . If the inspection has passed, execute step 870 .

[0179] Step 860: put into normal production and use.

[0180] If the inspection results are confirmed to be passed, it means that the image acquisition equipment can be put into normal use.

[0181] Step 870: Find the cause and re-inspect.

[0182] If the inspection result fails, it is necessary to find the cause and then adjust the coating system. For example, at least one of the position of the contoured cell, the position of the image acquisition device, and the light source corresponding to the image acquisition device can be adjusted. After the adjustment is completed, re-inspection is performed.

[0183] As shown in FIG9 , an embodiment of the present application provides another implementable method for spot inspection of a film packaging system. As shown in FIG9 , the spot inspection method of the film packaging system includes steps 910 to 970 .

[0184] Step 910: The host computer starts a one-key inspection program in response to the user's target operation on the target control displayed on the host computer.

[0185] In this step, the user can scan the graphic code in the host computer through the code scanning terminal, and then display the target control. By operating the target control, an image acquisition signal can be generated, thereby triggering the inspection program.

[0186] Step 920: The host computer sends an image acquisition signal to the controller.

[0187] Step 930: The controller generates a control instruction.

[0188] In this step, the controller may generate a control instruction according to the image acquisition signal.

[0189] Step 940: The conveying component controls the movement of the contoured battery cell.

[0190] In this step, the conveying component can control the movement of the contoured battery cell according to the control instruction.

[0191] Step 950: Move the contoured cell to the first inspection position and photograph the target surface.

[0192] In this step, after determining that the contoured cell has moved to the first inspection position, the large surface of the contoured cell can be photographed first. After the two large surfaces are photographed, the host computer replies to the controller with an instruction that the large surface has been photographed. The controller then generates a control instruction based on the instruction. The transmission component controls the contoured cell to move at the first inspection position based on the control instruction. Specifically, it can be moved to a position for photographing the side of the contoured cell, and then the side camera is used to photograph the two side surfaces of the contoured cell. After the two side surfaces are photographed, the host computer replies to the controller with an instruction that the side has been photographed. The controller then generates a control instruction based on the instruction. The transmission component controls the contoured cell to move at the first inspection position based on the control instruction. Specifically, it can be moved to a position for photographing the bottom surface of the contoured cell, and then the side camera is used to photograph the bottom surface of the contoured cell. After the bottom surface of the contoured cell is photographed, the host computer replies to the controller with an instruction that the bottom surface has been photographed. The controller then generates a control instruction based on the instruction. The transmission component controls the contoured cell to move to the second inspection position based on the control instruction.

[0193] Step 960: Move the contoured cell to the second inspection position and photograph the target surface.

[0194] The photographing process in this step is the same as the photographing process of the first inspection position mentioned above, and will not be repeated here.

[0195] Step 970: The host computer detects multiple image acquisition devices based on the target image of the target surface to obtain detection results of the multiple image acquisition devices.

[0196] It should be understood that the present application is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, a detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and illustrated as examples. However, the method process of the present application is not limited to the specific steps described and illustrated. Those skilled in the art can make various changes, modifications, and additions, or change the order of the steps after understanding the spirit of the present application.

[0197] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium that can store or transmit information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0198] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps. In other words, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0199] Aspects of the present application have been described above with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present application. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed via the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. This processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor or a field programmable logic circuit. It is also understood that each box in the block diagram and / or the flowchart and the combination of the boxes in the block diagram and / or the flowchart can also be implemented by the dedicated hardware that performs the specified function or action, or can be implemented by the combination of dedicated hardware and computer instructions.

[0200] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A coating system, the system comprising: A transfer component, multiple image acquisition devices, and a host computer; The transfer component is used to transfer a profiling battery cell on the transfer path of the film wrapping process when the film wrapping system needs to be inspected; The multiple image acquisition devices are used to acquire a target image of the target surface of the profiling battery cell when it is determined that the profiling battery cell reaches the inspection point in the transfer path of the film wrapping process; the target image includes a first image and a second image; The host computer is used to detect the multiple image acquisition devices based on the target image to obtain the detection results of the multiple image acquisition devices; A inspection piece is arranged on the target surface of the profiling battery cell; Specifically, the host computer is used to calculate the information to be inspected of the inspection piece in the image for any one of the first image and the second image, compare the information to be inspected of the inspection piece in the image with the reference inspection information of the inspection piece to obtain the comparison result of the image, and determine the detection result of the image acquisition device according to the comparison result corresponding to the first image and the comparison result corresponding to the second image.

2. The system according to claim 1, wherein, The multiple image acquisition devices include a first image acquisition device and a second image acquisition device, the inspection points include a first inspection point and a second inspection point, the first image acquisition device is located at the first inspection point, and the second image acquisition device is located at the second inspection point; The first image acquisition device is used to acquire a first image of the first surface of the target surface of the profiling battery cell before film wrapping when it is determined that the profiling battery cell reaches the first inspection point; The second image acquisition device is used to acquire a second image of the first surface of the profiling battery cell after film wrapping when it is determined that the profiling battery cell reaches the second inspection point; The target surface of the profiling battery cell is other surfaces of the profiling battery cell except the top surface, and the first surface is any one of the other surfaces of the profiling battery cell except the top surface; 3. The system according to any one of claims 1-2, wherein, The host computer is further used to send an image acquisition signal to the controller; The system further includes: The controller is used to generate a control instruction when receiving the image acquisition signal; Specifically, the transfer component is used to transfer the profiling battery cell on the transfer path of the film wrapping process based on the control instruction.

4. The system according to claim 3, wherein The host computer includes a graphic code. Specifically, the host computer is used to send an image acquisition signal to the controller in response to a target operation of the user on a target control displayed on the host computer; The target control is a control displayed on the host computer after the code scanning terminal scans the graphic code.

5. An inspection method for a film wrapping system, the method includes: When it is determined that the profiling battery cell reaches the inspection point in the transfer path of the film wrapping process, obtain the target image of the target surface of the profiling battery cell sent by multiple image acquisition devices; a inspection piece is arranged on the target surface of the profiling battery cell; the target image includes a first image and a second image; Detect the multiple image acquisition devices based on the target image to obtain the detection results of the multiple image acquisition devices; Detecting the multiple image acquisition devices based on the target image to obtain the detection results of the multiple image acquisition devices, including: For any one of the first image and the second image, calculating the information to be inspected of the inspection piece in the image; For any one of the first image and the second image, comparing the information to be inspected of the inspection piece in the image with the reference inspection information of the inspection piece to obtain the comparison result of the image; Determining the detection results of the multiple image acquisition devices according to the comparison result corresponding to the first image and the comparison result corresponding to the second image.

6. The method according to claim 5, wherein, The multiple image acquisition devices include a first image acquisition device and a second image acquisition device, the inspection points include a first inspection point and a second inspection point, the first image acquisition device is located at the first inspection point, the second image acquisition device is located at the second inspection point, the target image includes a first image and a second image; the target surface of the profiled battery cell is other surfaces of the profiled battery cell except the top surface; The obtaining the target images of the target surfaces of the profiled battery cells sent by the multiple image acquisition devices includes: Obtaining the first image of the first surface of the target surface of the profiled battery cell before film wrapping collected by the first image acquisition device when it is determined that the profiled battery cell reaches the first inspection point; the first surface is any one of the other surfaces of the profiled battery cell except the top surface; Obtaining the second image of the first surface of the profiled battery cell after film wrapping collected by the second image acquisition device when it is determined that the profiled battery cell reaches the second inspection point condition.

7. The method according to claim 5, wherein The information to be inspected includes a gray value and dimension information, and the reference inspection information includes a reference gray value and reference dimension information; The comparing the information to be inspected of the inspection piece in the image with the reference inspection information of the inspection piece to obtain the comparison result of the image includes: Comparing the gray value of the inspection piece in the image with the reference gray value of the inspection piece, and comparing the dimension information of the inspection piece in the image with the reference dimension information of the inspection piece to obtain the comparison result of the image.

8. The method according to claim 7, wherein The inspection piece includes at least one area, and each area includes a preset pattern; The calculating the information to be inspected of the inspection piece in the image includes: Respectively calculating the dimension information of each preset pattern in the inspection piece in the image, and the average value of the gray values of the target areas in the at least one area of the inspection piece in the image, wherein the target area in each area is the area except the preset pattern in the area; The comparing the gray value of the inspection piece in the image with the reference gray value of the inspection piece includes: Determining the first difference between the dimension information of each preset pattern in the inspection piece in the image and the reference dimension information of each preset pattern in the inspection piece; Comparing the dimension information of the inspection piece in the image with the reference dimension information of the inspection piece includes: Determining a second difference between the average value and the average value of the reference gray values of the target areas in at least one area of the inspection piece.

9. The method according to claim 8, wherein Determining the detection results of the multiple image acquisition devices according to the comparison results corresponding to the first image and the comparison results corresponding to the second image includes: For the comparison result of any one of the first image and the second image, when it is determined that the first difference is less than the first preset difference threshold and the second difference is less than the second preset difference threshold, determining that the detection result of the image acquisition device corresponding to the image is a pass; When it is determined that the comparison result is that the first difference is not less than the first preset difference threshold, and / or, When the comparison result is that the second difference is not less than the second preset difference threshold, determining that the detection result of the image acquisition device corresponding to the image is a failure.

10. The method according to claim 9, wherein, After it is determined that the comparison result is that the first difference is not less than the first preset difference threshold, the method further includes: Outputting adjustment information of the target object so that after the target object is adjusted, the comparison result is that the first difference is less than the first preset difference threshold and the second difference is less than the second preset difference threshold; The target object includes at least one of the following: The position of the profiling battery cell; The positions of the multiple image acquisition devices; The light sources corresponding to the multiple image acquisition devices.

11. The method according to claim 9, wherein When it is determined that the comparison result is that the second difference is not less than the second preset difference threshold, determining that the detection result of the image acquisition device corresponding to the image is a failure, includes: When it is determined that the comparison result is that the second difference is not less than the second preset difference threshold, returning to execute the steps of calculating the gray value and dimension information of the inspection piece based on the inspection piece in the image, comparing the gray value with the reference gray value of the inspection piece, and comparing the dimension information with the reference dimension information of the inspection piece to obtain a comparison result; When the number of times that the comparison result is that the second difference is not less than the second preset difference threshold reaches the preset number of times, determining that the detection result of the corresponding image acquisition is a failure.

12. The method according to claim 6, wherein, Obtaining the first image of the first surface of the target surface of the profiling battery cell collected by the first image acquisition device when it is determined that the profiling battery cell reaches the first inspection point includes: Obtaining the first sub-image and the second sub-image of the first surface of the target surface of the profiling battery cell collected by the first image acquisition device when it is determined that the profiling battery cell reaches the first inspection point, where both the first sub-image and the second sub-image include partial areas of the first surface, and the partial areas of the first surface in the first sub-image and the partial areas of the first surface in the second sub-image form all areas of the target surface; Fusing the first sub-image and the second sub-image to obtain the first image.

Images