CN117593550B - Coating system and inspection method of coating system - Google Patents

Abstract

The application provides a coating system and a spot inspection method of the coating system, wherein the coating system comprises the following components: the system comprises a transmission assembly, a plurality of image acquisition devices and an upper computer; the conveying assembly is used for conveying the profiling battery cell on a conveying path of the coating procedure under the condition that spot inspection is required to be carried out on the coating equipment; the plurality of image acquisition devices are used for acquiring target images of target surfaces of the profiling battery cells under the condition that the profiling battery cells are determined to reach point detection points in a conveying path of the coating process; and the upper computer is used for detecting the plurality of image acquisition devices based on the target image to obtain detection results of the plurality of image acquisition devices. So as to realize accurate detection of the coating system.

Description

Coating system and inspection method of coating system

Technical Field

The present application relates to the field of battery technology, and in particular to a coating system and a method for inspecting the coating system.

Background technique

With the development of the electric vehicle industry, battery packs, as an important part of electric vehicles, have also received more and more attention. As an important part of the battery pack, the quality of the battery cell has also been increasingly valued. The coating process is an important part of battery cell manufacturing. Before and after coating, the coating system needs to be inspected. Only after the inspection is passed can the coating be carried out.

At present, the method of spot checking the film coating system in the film coating process is to first use an image acquisition device to obtain an image of the battery cell, and then manually confirm whether the grayscale value of the image is consistent with the grayscale value of the film on the actual battery cell. The inspection result of the film coating system is confirmed based on the comparison result. The above scheme is inefficient when spot checking the film coating system, and the inspection result is not accurate enough.

Summary of the invention

In view of the above problems, the present application provides a membrane encapsulation system and a method for spot inspection of the membrane encapsulation system to achieve accurate inspection of the membrane encapsulation system.

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 it is necessary to perform a spot inspection on the coating system; multiple image acquisition devices are used to collect a target image of a target surface of the profiled battery cell when it is determined that the profiled battery cell has arrived at a spot inspection position in the conveying path of the coating process; the target image includes a first image and a second image; a host computer is used to detect multiple image acquisition devices based on the target image to obtain detection results of multiple image acquisition devices; a spot inspection piece is set on the target surface of the profiled battery cell; 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.

In the above technical solution, the coating system includes: a conveying assembly for conveying the profiled battery cell on the conveying path of the coating process when the coating system needs to be inspected, multiple image acquisition devices for collecting target images of the target surface of the profiled battery cell when it is determined that the profiled battery cell has reached the inspection position in the conveying path of the coating process, and a host computer for detecting the multiple image acquisition devices based on the target image to obtain the detection results of the multiple image acquisition devices. Since the real battery cell is not used during the inspection, but the profiled battery cell with the real battery cell is used, the profiled battery cell can be photographed repeatedly without damaging the real battery cell, and the size of the profiled battery cell is only one size, so the consistency of each inspection can be ensured, and there is no need to spend manpower to adjust the shooting parameters of the image acquisition device during each inspection, which saves manpower, and the inspection results are determined by the host computer, without manual verification, which improves the accuracy of the inspection results.

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 coating 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 coating 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.

In the above technical scheme, when it is determined that the contoured cell has reached 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 reached 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.

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; a transmission component, specifically used to transmit the contoured battery cell on the transmission path of the coating process based on the control instruction.

In the above technical solution, 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.

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.

In the above technical solution, the target control can be displayed by scanning the graphic code with a 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 procedure for the coating equipment, thereby improving the efficiency of the inspection.

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

In the above technical solution, by determining the inspection position in the conveying path where the contoured battery cell reaches the coating process, the target image of the target surface of the contoured battery cell sent by multiple image acquisition devices is obtained, and then the multiple image acquisition devices are inspected 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.

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, 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 image 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 coating, which is collected by the first image acquisition device when it is determined that the contoured battery cell has reached 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 coating, which is collected by the second image acquisition device when it is determined that the contoured battery cell has reached the second inspection site.

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

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 comparison result of the image, 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 comparison result of the image.

In the above technical scheme, 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.

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 region 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.

In the above technical scheme, 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 spot inspection information of the spot inspection film, and the image comparison result can be accurately obtained.

In some embodiments of the present application, detection results of multiple image acquisition devices are determined based on the comparison result corresponding to the first image and the comparison result corresponding to the second image, including: for the comparison result 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 a first preset difference threshold, and the second difference is less than a 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.

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 is passed.

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 also 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.

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.

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.

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.

In some embodiments of the present application, obtaining a first image of a first surface in a target surface of a contoured cell that is captured by a first image acquisition device when determining that the contoured cell has arrived at a first inspection position includes: obtaining a first sub-image and a second sub-image of the first surface in the target surface of the contoured cell that are captured by the first image acquisition device when determining that the contoured cell has arrived at a first inspection position, wherein the first sub-image and the second sub-image both 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 constitute the entire area of the target surface; and fusing the first sub-image and the second sub-image to obtain a first image.

In the above technical solution, by acquiring the first sub-image and the second sub-image of the first surface of the target surface of the contoured battery cell sent by the first image acquisition device when it is determined that the contoured 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

Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

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

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

FIG3 is a schematic diagram of the structure of a contoured battery cell provided in one embodiment of the present application;

FIG4 is a schematic diagram of a configuration method of an image acquisition device provided in an embodiment of the present application;

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

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

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

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

FIG9 is a schematic flow chart of a method for inspecting a coating device according to another embodiment of the present application;

FIG. 10 is a schematic structural diagram of a spot inspection device for film coating equipment provided in another embodiment of the present application.

Detailed ways

The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

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.

In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

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

In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

In the description of the embodiments of the present application, unless otherwise clearly specified and 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. Moreover, a first feature being "above", "above" or "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 higher in level than the second feature. A first feature being "below", "below" or "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 lower in level than the second feature.

Before introducing the technical solution of the embodiment of the present application, the background technology of the embodiment of the present application is first introduced:

The current process of spot inspection of the coating system is as follows: use an image acquisition device to obtain an image of the real battery cell, and then manually confirm whether the grayscale value of the image is consistent with the grayscale value of the film on the real battery cell at a fixed time. According to the comparison result, the spot inspection result of the coating system is confirmed. Since each side of the battery cell needs to be photographed, that is, the real battery cell needs to be photographed repeatedly and manually checked, the above scheme is inefficient when inspecting the coating system, and the inspection results are not accurate enough. And because the inspection battery cell used each time is different, and the size of each inspection battery cell is different, each time the inspection battery cell is photographed, a professional needs to adjust the shooting parameters of the image acquisition device. After the adjustment is completed, the inspection can be carried out, which increases the labor cost and causes the consistency of each inspection to decrease.

In order to solve the above problems, the embodiment of the present application provides a coating system and a method for spot inspection of the coating system, wherein the coating system includes: a conveying assembly for conveying a profiled cell on a conveying path of a coating process when the coating system needs to be spot inspected, multiple image acquisition devices for collecting target images of a target surface of the profiled cell when it is determined that the profiled cell has reached a spot inspection position in the conveying path of the coating process, and a host computer for detecting multiple image acquisition devices based on the target image to obtain detection results of multiple image acquisition devices. Since during the spot inspection, instead of using a real cell, a profiled cell similar to the real cell is used, the profiled cell can be photographed repeatedly without damaging the real cell, and the size of the profiled cell has only one size, so the consistency of each spot inspection can be ensured, and there is no need to spend manpower to adjust the shooting parameters of the image acquisition device during each spot inspection, which saves manpower, and the spot inspection results are determined by the host computer without manual verification, which improves the accuracy of the spot inspection results.

The encapsulation system provided in the embodiment of the present application is described in detail below in conjunction with FIG. 1 .

FIG1 shows a schematic structural diagram of a film encapsulation system provided by an 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 .

The conveying assembly 110 is used to convey the contoured battery cell on the conveying path of the coating process when the coating system needs to be inspected;

A plurality of image acquisition devices 120, for acquiring a target image of a target surface of the profiling cell when it is determined that the profiling cell has reached a spot inspection position in a conveying path of the coating process;

The host computer 130 is used to detect multiple image acquisition devices based on the target image to obtain detection results of the multiple image acquisition devices.

The coating process may be a process of coating the battery cell in the battery cell manufacturing process. The specific coating process may be as shown in FIG2. In the upper part of FIG2, the direction indicated by the arrow is the logistics direction of the coating process. First, the material is loaded and cached at station A, the core is loaded at station B, and then the coating is hot-melted at station C, the glue is applied at station D, the shell is placed at station E, and finally the material is unloaded at station F.

The emulated battery cell can be a battery cell made by imitating a real battery cell. The appearance of the emulated battery cell is completely consistent with the real battery cell. The emulated battery cell can be understood as a structure that has the same appearance as the real battery cell but is empty inside, as shown in FIG. 3 .

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

The image acquisition device may be a device for performing image acquisition, for example, a camera.

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 FIG. 2 , that is, there is an inspection site before and after the workstation C, respectively.

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

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.

Specifically, for each surface to be captured, the corresponding image capture device is set as 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 profiling cell P, namely the side surface 33 in FIG3 and the other side surface opposite to the side surface 33 (not shown in the figure). For example, the side camera M can be used to capture the image of the side surface 33, and the side camera N can be used to capture the image of the other side surface opposite to the side surface 33. The two large surface cameras 43 are respectively used to capture the two large surfaces of the profiling cell P, namely the large surface 34 in FIG3 and the other large surface opposite to the large surface 34 (not shown in the figure). For example, one large surface camera 43 can be used to capture the image of the large surface 34, and the other large surface camera 43 can be used to capture the other large surface opposite to the large surface 34. The bottom surface camera 44 is used to capture the bottom surface of the profiling cell P in FIG3 , that is, the other surface opposite to the top surface 32 (not shown in the figure).

It should be noted that the side camera K and the side camera L in FIG. 4 photograph the two side surfaces of another contoured battery cell Q different from the contoured battery cell P.

Continuing to refer to FIG. 2 , the lower half of FIG. 2 is a top view of the upper half of FIG. 2 , wherein 20 is a magnetic suspension guide rail, which is equivalent to a conveying assembly. The side camera M and the side camera N in station G in FIG. 2 are respectively used to photograph the two side faces of the profiling cell P, and the two large-surface cameras 43 are respectively used to photograph the two large faces of the profiling cell P. Correspondingly, the side camera M and the side camera N in station H in FIG. 2 are respectively used to photograph the two side faces of the profiling cell Q, and the two large-surface cameras 43 are respectively used to photograph the two large faces of the profiling cell Q. In FIG. 2 , the bottom cameras in stations G and H are not shown because they are blocked by their corresponding side cameras. Taking station G as an example, the bottom camera in station G is blocked by the side camera M, so it is not shown.

In addition, it should be noted that, in FIG. 2 , the magnetic suspension 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.

In an embodiment of the present application, the coating system includes: a conveying assembly for conveying the profiled battery cell on the conveying path of the coating process when the coating equipment needs to be inspected, a plurality of image acquisition devices for collecting target images of the target surface of the profiled battery cell when it is determined that the profiled battery cell has reached the inspection position in the conveying path of the coating process, and a host computer for detecting the plurality of image acquisition devices based on the target image to obtain the detection results of the plurality of image acquisition devices. Since the real battery cell is not used during the inspection, but the profiled battery cell similar to the real battery cell is used, the profiled battery cell can be photographed repeatedly without damaging the real battery cell, and the size of the profiled battery cell is only one size, so the consistency of each inspection can be ensured, and there is no need to spend manpower to adjust the shooting parameters of the image acquisition device during each inspection, which saves manpower, and the inspection results are determined by the host computer, without manual verification, which improves the accuracy of the inspection results.

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 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;

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 the film is coated when it is determined that the profiling cell has reached a first inspection position;

The second image acquisition device is used to acquire a second image of the first surface of the contoured battery cell after being coated when it is determined that the contoured battery cell has reached the second inspection position.

Among them, the first image acquisition device and the second image acquisition device can each be at least one.

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 station G and the station H in FIG. 2 , respectively.

The first image may be an image of the profiling cell collected at the first inspection position, that is, an image of the profiling cell collected before encapsulation. The second image may be an image of the profiling cell collected at the second inspection position, that is, an image of the profiling cell collected after encapsulation.

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

In some embodiments of the present application, when it is determined that the contoured battery cell has reached a first inspection location, a first image acquisition device may be used to capture a first image of the first surface of the target surface of the contoured battery cell before being coated; and when the contoured battery cell has reached a second inspection location, a second image acquisition device may be used to capture a second image of the first surface of the contoured battery cell after being coated.

It should be noted that a plurality of image acquisition devices for acquiring target images of the target surface are respectively provided at the first inspection point and the second inspection point, and the setting methods of the image acquisition devices at the first inspection point and the second inspection point are as shown in FIG4 , that is, the first inspection point and the second inspection point are both provided with two side cameras, two large surface cameras and one bottom surface camera, that is, the setting method of the image acquisition device at the first inspection point and the setting method of the image acquisition device at the second inspection point are consistent.

In an embodiment of the present application, when it is determined that the contoured cell has reached the first inspection position, the first image acquisition device acquires a first image of the first surface of the target surface of the contoured cell before being coated. When the contoured cell has reached the second inspection position, the second image acquisition device acquires a 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 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.

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 the other five surfaces of the profiling cell except the top surface, such as the spot inspection sheet 35 in FIG3 . The spot inspection sheet here can be a structure for spot inspection, for example, a film sheet.

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 according to the comparison result corresponding to the first image and the comparison result corresponding to the second image.

The information to be inspected may be information to be inspected, and specifically may be grayscale value and size information of the film.

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, and the reference inspection information may be reference grayscale value and reference size information of the film.

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 comparison result of the image, 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 comparison result of the image, 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 described in detail in the following embodiments.

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 an 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.

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

The above-mentioned system may also include:

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

The conveying component is specifically used to transport the shaped battery cell on the conveying path of the coating process based on the control instruction.

The image acquisition signal may be a signal for prompting that an image of the profiling cell needs to be acquired. The image acquisition signal may be generated by a host computer. The specific generation method will be described in detail in the following embodiments.

The control instruction may be an instruction generated by the controller for controlling the transportation of the contoured battery cell when the controller receives the image acquisition signal.

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, thereby saving the loss of the inspection system.

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, the target control can be displayed on the host computer. The host computer then sends an image acquisition signal to the controller in response to the user's target operation on the target control displayed on the host computer.

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).

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

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

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

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 procedure for the coating equipment, thereby improving the efficiency of the inspection.

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

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.

Step 510: When it is determined that the contoured cell has reached the inspection position in the conveying path of the coating process, a target image of the target surface of the contoured cell sent by a plurality of image acquisition devices is acquired.

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

In an embodiment of the present application, by obtaining target images of the target surface of the contoured battery cell sent by multiple image acquisition devices when determining the inspection position in the conveying path where the contoured battery cell arrives at the coating process, 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. This eliminates the need for manual inspection, thereby improving the efficiency and accuracy of the inspection.

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 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.

Referring to FIG. 6 , step 510 may specifically include steps 5101 and 5102:

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 reached a first inspection position.

Step 5102: Acquire 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 reached a second inspection location.

In an embodiment of the present application, by respectively acquiring images of the first surface of the contoured battery 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.

When using an image acquisition device to capture an image of a certain side of a contoured battery cell, it is necessary to make the side occupy a relatively large area in the image, so as to facilitate the subsequent calculation of the size information of the preset graphic based on the image. However, due to the large size of the contoured battery cell or the shooting capability of the camera itself, if the side is completely captured in one image, the area occupied by the side in the image is relatively small, which is not convenient for subsequent calculations.

In order to solve the above problem, step 5101 may specifically include:

Acquire a first sub-image and a second sub-image of a first surface of a target surface of the profiling cell, which are sent by the first image acquisition device and acquired when it is determined that the profiling cell has reached a first inspection position;

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

Among them, the first sub-image and the second sub-image may be images of the first surface taken, and the first sub-image and the second sub-image may 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.

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

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 completed side 33.

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.

In an embodiment of the present application, by acquiring the first sub-image and the second sub-image of the first surface of the target surface of the contoured battery cell sent by the first image acquisition device when it is determined that the contoured 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.

In some embodiments of the present application, a detection sheet is provided on the target surface of the profiling cell.

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

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.

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 the comparison result of the image.

Step 5203: Determine the detection results of multiple image acquisition devices according to the comparison result corresponding to the first image and the comparison result corresponding to the second image.

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 an 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.

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.

Step 5202 may specifically include:

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.

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.

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

In one example, continuing to refer to FIG. 3 , taking the preset graphic as a circle as an example, the inspection piece 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.

Step 5201 may specifically include:

Calculating the size information of each preset figure in the spot inspection piece in the image and the average value of the grayscale value of the target area in at least one area in the spot inspection piece in the image respectively;

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:

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

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:

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.

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.

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

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 preset, that is, the above-mentioned reference size information and reference grayscale value are all known.

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

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.

Similarly, by using the same calculation method as the first difference between the size information of the measured circle in the above-mentioned 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.

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.

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

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 may be the average grayscale value of the target area of these multiple areas.

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.

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 area 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.

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.

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, and 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.

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

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 spot inspection information of the spot inspection film, and the image comparison result can be accurately obtained.

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

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 detection passed;

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.

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

In some embodiments of the present application, for any one of the first image and the second image, if the comparison result corresponding to the image 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, then it is determined that the detection of the image acquisition device that acquired the image has passed. 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 detection of the image acquisition device that acquired the image has failed.

In one example, with continued reference to FIG. 2 , FIG. 3 and FIG. 4 , the workstation G in FIG. 2 has several cameras as shown in FIG. 4 , wherein the side camera M is used to capture an image of the side 33 , and the side camera N is used to capture an image of another side opposite to the side 33 . If the comparison result of the captured image of the side 33 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, then it is determined that the detection of the side camera M has passed. If the comparison result of the captured image of the 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 it is determined that the detection of the side camera M has failed.

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, it can be accurately determined whether the detection of the image acquisition device is passed based on the relationship between the first difference and the first preset difference threshold, and the second difference and the second preset difference threshold.

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 involved further includes:

The 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.

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

Position of the contoured cell;

the locations of multiple image acquisition devices;

Light sources corresponding to multiple image acquisition devices.

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.

It should be noted that when adjusting the positions of multiple image acquisition devices, only the positions of image acquisition devices whose comparison results are the first difference not less than the first preset difference threshold can be adjusted, without adjusting the positions of each image acquisition device. Similarly, when adjusting the light sources of multiple image acquisition devices, only the light sources of image acquisition devices whose comparison results are the first difference not less than the first preset difference threshold can be adjusted, without adjusting the light sources of each image acquisition device.

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.

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, determining that the detection result of the image acquisition device corresponding to the image is a detection failure may specifically include:

If it is determined that the comparison result is 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 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 value for a number of times reaching a preset number of times, it is determined that the detection result of the image acquisition corresponding to the image is detection failure.

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 embodiments of the present application.

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 a 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, then it can be determined that the detection result of the image acquisition corresponding to the image is a detection failure.

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 spot checks 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.

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 FIG8 , and the inspection method of the coating system includes steps 810 to 880.

Step 810: Place the contoured battery cell.

Step 820: Pass through the inspection points in sequence.

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.

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

When it is determined that the profiling cell reaches the first inspection position, the first image acquisition device is triggered to acquire a first image of the target surface of the profiling cell. When it is determined that the profiling cell reaches the second inspection position, the second image acquisition device is triggered to acquire a second image of the target surface of the profiling cell.

Step 840: Inspection completed.

Step 850 , determine whether the spot check has passed. If not, execute step 860 ; if the spot check has passed, execute step 870 .

Step 860: put into normal production and use.

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

Step 870: Find the cause and re-check.

If the spot 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, re-inspection is performed.

As shown in FIG. 9 , the embodiment of the present application provides another implementable manner of a spot inspection method for a film packaging system. As shown in FIG. 9 , the spot inspection method for a film packaging system includes steps 910 to 970 .

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.

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.

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

Step 930: The controller generates a control instruction.

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

Step 940: The conveying assembly controls the movement of the contoured battery cell.

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

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

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

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

The photographing process in this step is the same as the photographing process of the first inspection position mentioned above, and will not be described in detail here.

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.

Based on the same inventive concept, the embodiment of the present application further provides a spot inspection device for a film coating system. The spot inspection device for a film coating system provided by the embodiment of the present application is described in detail below in conjunction with FIG.

FIG10 is a schematic diagram showing the structure of a spot inspection device for a film coating system provided by an embodiment of the present application. As shown in FIG10 , the spot inspection device for the film coating system may include:

A first acquisition module 1010 is used to acquire target images of target surfaces of the profiling cells sent by multiple image acquisition devices when it is determined that the profiling cells have reached the inspection position in the conveying path of the coating process;

The first detection module 1020 is used to detect the multiple image acquisition devices based on the target image to obtain detection results of the multiple image acquisition devices.

In an embodiment of the present application, by obtaining target images of the target surface of the contoured battery cell sent by multiple image acquisition devices when determining the inspection position in the conveying path where the contoured battery cell arrives at the coating process, 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. This eliminates the need for manual inspection, thereby improving the efficiency and accuracy of the inspection.

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 position includes a first inspection position and a second inspection position, the first image acquisition device is located at the first inspection position, the second image acquisition device is located at the second inspection position, 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;

The first acquisition module 1010 may specifically include:

A first acquisition unit is used to acquire a first image of a first surface of a target surface of the profiling cell before being coated, which is sent by the first image acquisition device and is acquired when it is determined that the profiling cell has reached the first inspection position;

The second acquisition unit is used to acquire the second image of the first surface of the contoured battery cell after being coated, which is sent by the second image acquisition device when it is determined that the contoured battery cell reaches the second inspection position.

In some embodiments of the present application, the target surface of the contoured battery cell is provided with a spot inspection sheet;

The first detection module 1020 may specifically include:

A first calculation unit, configured to calculate, for any one of the first image and the second image, the information to be inspected of the inspection slice in the image;

a first comparison unit, configured to compare, for any one of the first image and the second image, the information to be inspected of the inspection film in the image with the reference inspection information of the inspection film, to obtain a comparison result of the image;

The first determination unit is used to determine 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.

In some embodiments of the present application, the information to be inspected includes grayscale value and size information, and the reference inspection information includes reference grayscale value and reference size information;

The first comparison unit can be specifically used for:

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 a comparison result of the image.

In some embodiments of the present application, the spot inspection sheet includes at least one area, each area includes a preset pattern;

The first computing unit may be specifically configured to:

Calculating the size information of each preset figure in the spot inspection piece in the image and the average value of the grayscale value of the target area in the at least one area in the spot inspection piece in the image, respectively, wherein the target area in each area is the area in the area excluding the preset figure;

The first comparison unit can be specifically used for:

Determine a first difference between the size information of each of the preset figures in the spot inspection piece in the image and the reference size information of each of the preset figures in the spot inspection piece;

A second difference between the average value and an average value of reference grayscale values of a target area in at least one area of the spot inspection film is determined.

In some embodiments of the present application, the first determining unit may be specifically configured to:

For a comparison result 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 a first preset difference threshold, and the second difference is less than a second preset difference threshold, determining that a detection result of the image acquisition device corresponding to the image is detection passed;

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, it is determined that the detection result of the image acquisition device corresponding to the image is detection failure.

In some embodiments of the present application, the first detection module 1020 may further include:

an output unit, configured to output 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 contoured cell;

the locations of the plurality of image acquisition devices;

The multiple image acquisition devices correspond to light sources.

In some embodiments of the present application, the first determining unit may be specifically configured to:

If it is determined that the comparison result is that the second difference is not less than a 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;

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

In some embodiments of the present application, the first acquiring unit is specifically used to:

Acquire a first sub-image and a second sub-image of a first surface of a target surface of the profiling cell, which are acquired by the first image acquisition device when it is determined that the profiling cell has reached the first inspection position, wherein the first sub-image and the second sub-image both include a partial area 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;

The first sub-image and the second sub-image are fused to obtain the first image.

It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

The functional blocks shown in the structural block diagram described above can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments 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. "Machine-readable medium" may include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memory, 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.

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, that is, the steps can be performed in the order mentioned in the embodiments, or in a different order from the embodiments, or several steps can be performed simultaneously.

The above describes various aspects of the present application 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 a 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 by the processor of the computer or other programmable data processing device enable the implementation of the functions/actions specified in one or more boxes of the flowchart and/or block diagram. Such a 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 can also be understood that each box in the block diagram and/or flowchart and the combination of boxes in the block diagram and/or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (10)

1. A film encapsulation system, characterized in that the system comprises: a transmission component, a plurality of image acquisition devices and a host computer; The conveying assembly is used to convey the contoured battery cell on the conveying path of the coating process when the coating system needs to be inspected; The plurality of image acquisition devices are used to acquire a target image of a target surface of the profiling cell when it is determined that the profiling cell has reached a spot inspection position in a 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 profiling cell is provided with a spot inspection sheet; The host computer is specifically used to calculate the information to be inspected of the spot inspection piece in the image for 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; The plurality of 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 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 reached the first inspection position; The second image acquisition device is used to acquire a second image of the first surface of the contoured cell after being coated when it is determined that the contoured cell has reached the second inspection position; The target surface of the contoured battery cell is the other surfaces of the contoured battery cell except the top surface, and the first surface is any one of the other surfaces of the contoured battery cell except the top surface. 2. The system according to claim 1, characterized in that the host computer is also used to send an image acquisition signal to the controller; The system further comprises: The controller is used to generate a control instruction when receiving the image acquisition signal; The conveying component is specifically used to transport the shaped battery cell on the conveying path of the coating process based on the control instruction. 3. The system according to claim 2, characterized in that 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 a target operation of a target control displayed on the host computer by a user; The target control is a control displayed on the host computer after the code scanning terminal scans the graphic code. 4. A method for inspecting a coating system, characterized in that the method comprises: When it is determined that the profiling cell reaches the inspection position in the conveying path of the coating process, a target image of the target surface of the profiling cell sent by multiple image acquisition devices is obtained; the target surface of the profiling cell is provided with an inspection piece; the target image includes a first image and a second image; Detecting the multiple image acquisition devices based on the target image to obtain detection results of the multiple image acquisition devices; The detecting the multiple image acquisition devices based on the target image to obtain the detection results of the multiple image acquisition devices includes: For any one of the first image and the second image, calculating the information to be inspected of the inspection slice in the image; For any one of the first image and the second image, compare the information to be inspected of the inspection film in the image with the reference inspection information of the inspection film to obtain a comparison result of the image; Determining detection results of the plurality of image acquisition devices according to a comparison result corresponding to the first image and a comparison result corresponding to the second image; The multiple image acquisition devices include a first image acquisition device and a second image acquisition device, the inspection sites include 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, 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; The step of acquiring target images of target surfaces of the profiling cells sent by multiple image acquisition devices comprises: Acquire a first image of a first surface among target surfaces of the contoured cell before being coated, which is sent by the first image acquisition device and is acquired when it is determined that the contoured cell has reached the first inspection position; the first surface is any one of the surfaces of the contoured cell except the top surface; A second image of the first surface of the contoured battery cell after being coated is acquired when it is determined that the contoured battery cell reaches the second inspection position and sent by the second image acquisition device. 5. The method according to claim 4, characterized in that the information to be inspected includes grayscale value and size information, and the reference inspection information includes reference grayscale value and reference size information; The step of 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: 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 a comparison result of the image. 6. The method according to claim 5, characterized in that the spot inspection film includes at least one area, and each area includes a preset pattern; The calculating the information to be inspected of the inspection slice in the image includes: Calculating the size information of each preset figure in the spot inspection piece in the image and the average value of the grayscale value of the target area in the at least one area in the spot inspection piece in the image, respectively, wherein the target area in each area is the area in the area excluding the preset figure; The comparing the grayscale value of the spot inspection piece in the image with a reference grayscale value of the spot inspection piece includes: Determine a first difference between size information of each of the preset patterns in the spot inspection piece in the image and reference size information of each of the preset patterns in the spot inspection piece; The comparing the size information of the spot inspection piece in the image with the reference size information of the spot inspection piece includes: A second difference between the average value and an average value of a reference grayscale value of a target area in at least one area of the spot inspection film is determined. 7. The method according to claim 6, characterized in that determining the detection 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 comprises: For a comparison result 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 a first preset difference threshold, and the second difference is less than a second preset difference threshold, determining that a detection result of the image acquisition device corresponding to the image is detection passed; 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, it is determined that the detection result of the image acquisition device corresponding to the image is detection failure. 8. The method according to claim 7, characterized in that after determining that the comparison result is that the first difference is not less than the first preset difference threshold, the method further comprises: 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 contoured cell; the locations of the plurality of image acquisition devices; The multiple image acquisition devices correspond to light sources. 9. The method according to claim 7, characterized in that, when it is determined that the comparison result is that the second difference is not less than a second preset difference threshold, determining that the detection result of the image acquisition device corresponding to the image is a detection failure comprises: If it is determined that the comparison result is that the second difference is not less than a 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; When it is determined that the comparison result is that the second difference is not less than the second preset difference threshold value for a preset number of times, the detection result of the image acquisition corresponding to the image is determined to be detection failure. 10. The method according to claim 4, characterized in that acquiring the first image of the first surface of the target surface of the profiling cell, which is sent by the first image acquisition device and is acquired when it is determined that the profiling cell has reached the first inspection position, comprises: Acquire a first sub-image and a second sub-image of a first surface of a target surface of the profiling cell, which are acquired by the first image acquisition device when it is determined that the profiling cell has reached the first inspection position, wherein the first sub-image and the second sub-image both include a partial area 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; The first sub-image and the second sub-image are fused to obtain the first image.