CN117740792B

CN117740792B - Bare cell detection system and point detection method thereof

Info

Publication number: CN117740792B
Application number: CN202410187401.6A
Authority: CN
Inventors: 祁磊; 姜平; 吴汉国
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-02-20
Filing date: 2024-02-20
Publication date: 2024-07-23
Anticipated expiration: 2044-02-20
Also published as: CN117740792A

Abstract

The application discloses a bare cell detection system and a spot detection method of the bare cell detection system. A bare cell detection system comprising: a conveying line; a main body detection assembly; the first inner tab detection assembly; the outer tab detection assembly and the second inner tab detection assembly; the conveying line is used for conveying a profiling block, and the profiling block is matched with the structure of the bare cell; the upper computer is used for detecting a large-area image, a top surface image, a bottom surface image, a cathode lug inner surface image, a cathode lug outer surface image, an anode lug outer surface image and an anode lug inner surface image to obtain a surface detection result of the bare cell. According to the embodiment of the application, the efficiency and the accuracy of the detection result of each surface of the bare cell can be effectively improved.

Description

Bare cell detection system and point detection method thereof

Technical Field

The application relates to the technical field of batteries, in particular to a bare cell detection system and a spot inspection method of the bare cell detection system.

Background

With the development of new energy technology, the application of the battery is more and more widespread, and the quality state of the bare cell is more and more important because the bare cell is taken as an important component of the battery. At present, whether the surface of the bare cell is qualified or not is generally detected in a visual detection mode, but as a plurality of surfaces of the bare cell are required to be detected, different cameras are required to be configured on each surface of the bare cell respectively in order to adapt to the conditions of different surfaces, so that the number and the variety of required cameras are large, the positions of the cameras are scattered, and whether the surface of the bare cell is qualified or not is easily caused, and the efficiency and the accuracy of detection results are low.

Disclosure of Invention

In view of the above problems, the present application provides a bare cell detection system and a spot inspection method of the bare cell detection system, which can effectively improve the efficiency and accuracy of the detection result of each surface of the bare cell.

In a first aspect, an embodiment of the present application provides a bare cell detection system, including:

The conveying line is used for conveying the bare cell to pass through the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly and the second inner tab detection assembly of the bare cell, and the bare cell comprises a main body, and a cathode tab and an anode tab which extend out of the top surface of the main body;

the main body detection assembly is used for shooting the large surface of the main body, the top surface of the main body and the bottom surface of the main body under the condition that the bare cell reaches the bare cell main body detection station to obtain a large surface image, a top surface image and a bottom surface image;

The first inner tab detection assembly is used for shooting the inner side surface of the cathode tab of the bare cell under the condition that the bare cell reaches a first inner tab detection station to obtain an inner surface image of the cathode tab;

The outer electrode lug detection assembly is used for shooting the outer side surface of the cathode electrode lug and the outer side surface of the anode electrode lug of the bare cell under the condition that the bare cell reaches the electrode lug detection station, so as to obtain an outer surface image of the cathode electrode lug and an outer surface image of the anode electrode lug;

The second inner tab detection assembly is used for shooting the inner side surface of the anode tab under the condition that the bare cell reaches a second inner tab detection station to obtain an image of the inner surface of the anode tab;

The upper computer is used for detecting a large-area image, a top surface image, a bottom surface image, a cathode lug inner surface image, a cathode lug outer surface image, an anode lug outer surface image and an anode lug inner surface image to obtain a surface detection result of the bare cell.

Based on this, under the condition that needs to detect the surface of naked electric core, the transfer chain can carry naked electric core to main part detection component, first interior utmost point ear detection component, outer utmost point ear detection component and second interior utmost point ear detection component respectively. Each detection component can be automatically aligned to the corresponding surface of the bare cell, so that the surface image of the bare cell is automatically collected, and finally, the detection result of the surface of the battery can be generated by identifying the surface image of each surface of the bare cell through an upper computer. Based on this, can effectively use manpower sparingly, and confirm the testing result through the host computer, can also improve detection efficiency to and the accuracy of testing result.

In some implementations of the first aspect, the conveyor line is further configured to convey a profiling block through the body detection assembly, the first inner tab detection assembly, the outer tab detection assembly, and the second inner tab detection assembly, the profiling block including a profiling body, and a cathode profiling tab and an anode profiling tab extending out of a top surface of the profiling body;

The profiling block is matched with the structure of the bare cell, and comprises a profiling large surface corresponding to the large surface of the bare cell, a profiling top surface corresponding to the top surface of the bare cell, a profiling bottom surface corresponding to the bottom surface of the bare cell, a profiling cathode tab inner surface corresponding to the inner side surface of the cathode tab, a profiling cathode tab outer surface corresponding to the outer side surface of the cathode tab, a profiling anode tab inner surface corresponding to the inner side surface of the anode tab and a profiling anode tab outer surface corresponding to the inner side surface of the anode tab;

The profile modeling large surface, the profile modeling top surface, the profile modeling bottom surface, the profile modeling cathode tab inner surface, the profile modeling cathode tab outer surface, the profile modeling anode tab inner surface and the profile modeling anode tab outer surface are all provided with calibration pieces, wherein the calibration pieces positioned on different profile modeling surfaces of the profile modeling block are similar in shape and different in area;

Any one of the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly and the second inner tab detection assembly is also used for shooting an image of the corresponding profiling surface of the detection assembly to obtain a spot detection image under the condition that the profiling block reaches a detection station corresponding to the detection assembly;

The upper computer is also used for generating a spot inspection result of each detection component according to each spot inspection image.

Based on the above, the calibration piece for checking each checking working point is integrated on the surface of the profiling block consistent with the shape and the size of the real bare cell, so that on one hand, each calibration piece is convenient to store, on the other hand, the checking process of the bare cell can be automatically simulated, the labor cost is saved, and the checking result is more referential.

In some implementations of the first aspect, the calibration piece of the contoured surface includes at least one gray area within any one of the contoured large surface, the contoured top surface, the contoured bottom surface, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab outer surface, and the contoured anode tab inner surface, and in the case where the number of gray areas is a plurality of the gray areas, the gray levels of the plurality of gray areas are different;

The upper computer is specifically configured to obtain, for a point detection image captured by each detection component, a first area image corresponding to each gray area in the point detection image, determine gray information of each first area image, compare the gray information of each first area image with reference gray information of each gray area, and generate a point detection result of a first capturing parameter of each detection component.

Based on the comparison result, the comparison result of the image can be accurately obtained by comparing the gray level information of the gray level region in the image with the reference gray level information of the gray level region, and further whether each detection assembly can acquire reliable image data or not can be accurately judged.

In some implementations of the first aspect, in any one of the contoured large face, the contoured top face, the contoured bottom face, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab inner surface, the calibration piece of the contoured surface includes at least one patterned area, where the number of patterned areas is a plurality of the patterned areas are similar in shape and different in area size;

the upper computer is specifically configured to obtain, for each of the point detection images captured by each of the detection assemblies, a second area image corresponding to each of the graphic areas in the point detection image, determine area information of each of the second area images, compare the area information of each of the second area images with reference area information of each of the graphic areas, and generate a point detection result of the second capturing parameters of each of the detection assemblies.

Based on the comparison, the comparison result of the images can be accurately obtained by comparing the area information of the second area image with the reference area information of each graphic area, and whether each detection assembly can acquire reliable image data or not can be accurately judged.

In some implementations of the first aspect, the bare cell detection system further includes a lower computer;

the upper computer is also used for sending an image acquisition instruction to the lower computer;

The lower computer is used for responding to the image acquisition instruction and generating a control instruction;

And the conveying line is also used for responding to the control instruction and conveying the bare cell or the profiling block among the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly and the second inner tab detection assembly.

Based on this, realize the linkage of host computer, lower computer, transfer chain, improve naked electric core detecting system's detection process's degree of automation, moreover, the transfer chain just transports naked electric core or profile modeling piece when receiving the image acquisition instruction, reduces naked electric core detecting system's loss.

In a second aspect, an embodiment of the present application provides a spot inspection method of a bare cell detection system, including:

Under the condition that the profiling block is conveyed to a detection station corresponding to the main body detection assembly through the conveying line, the main body detection assembly shoots a profiling large surface, a profiling top surface and a profiling bottom surface of the profiling block, and a profiling block large surface image, a profiling block top surface image and a profiling block bottom surface image are obtained;

under the condition that the profiling block is conveyed to a detection station of a first inner tab detection assembly through a conveying line, the inner surface of a profiling cathode tab of the profiling block is shot through the first inner tab detection assembly, and a first image is obtained;

Under the condition that the profiling block is conveyed to a detection station of the outer lug detection assembly through the conveying line, the outer lug detection assembly shoots the outer surface of the profiling cathode lug and the outer surface of the profiling anode lug of the profiling block, and a second image of the outer surface of the profiling cathode lug and a third image of the outer surface of the profiling anode lug are obtained;

Under the condition that the profiling block is conveyed to a detection station of a second inner tab detection assembly through a conveying line, the inner surface of a profiling anode tab of the profiling block is shot through the second inner tab detection assembly to obtain a fourth image, wherein calibration pieces are arranged on a profiling large surface, a profiling top surface, a profiling bottom surface, the inner surface of a profiling cathode tab, the outer surface of the profiling cathode tab, the inner surface of the profiling anode tab and the outer surface of the profiling anode tab, and the calibration pieces positioned on different profiling surfaces of the profiling block are similar in shape and different in area;

And when the upper computer receives any point detection image of the profiling block large-surface image, the profiling block top surface image, the profiling block bottom surface image, the first image, the second image, the third image and the fourth image, generating a point detection result of the point detection image corresponding to the detection assembly according to the point detection image.

Based on the method, under the condition that the fixed profiling block reaches the detection station of each detection assembly through acquiring each detection station, each detection station can shoot to obtain an image of the profiling surface corresponding to each detection station, then the upper computer can judge the spot detection result of each detection station based on the image of the profiling surface corresponding to each detection station, the labor participation amount in the whole process is small, and spot detection efficiency and spot detection accuracy are effectively improved.

In some implementations of the second aspect, when the point detection result of the main body detection assembly is not passing, the upper computer outputs first adjustment information of the main body detection assembly, and returns to the step of capturing the profiling large surface, the profiling top surface and the profiling bottom surface of the profiling block through the main body detection assembly, so as to obtain a profiling block large surface image, a profiling block top surface image and a profiling block bottom surface image, wherein the first adjustment information includes at least one of the following: the position of the profiling block, the position of the main body detection assembly and shooting parameters of the main body detection assembly;

Outputting second adjustment information of the first inner tab detection assembly through the upper computer under the condition that the spot detection result of the first inner tab detection assembly is not passed, and returning to the step of shooting the inner surface of the profiling cathode tab of the profiling block through the first inner tab detection assembly to obtain a first image, wherein the second adjustment information comprises at least one of the following: the position of the profiling block, the position of the first inner tab detection assembly and shooting parameters of the first inner tab detection assembly;

Outputting third adjustment information of the outer tab detection assembly through the upper computer under the condition that the spot detection result of the outer tab detection assembly is not passed, and returning to the step of shooting the outer surface of the profiling cathode tab and the outer surface of the profiling anode tab of the profiling block through the outer tab detection assembly to obtain a second image of the outer surface of the profiling cathode tab and a third image of the outer surface of the profiling anode tab, wherein the third adjustment information comprises at least one of the following: the position of the profiling block, the position of the outer lug detection assembly and shooting parameters of the outer lug detection assembly;

Outputting fourth adjustment information of the second inner tab detection assembly through the upper computer under the condition that the spot detection result of the second inner tab detection assembly is not passed, and returning to the step of shooting the inner surface of the profiling anode tab of the profiling block through the second inner tab detection assembly to obtain a fourth image, wherein the fourth adjustment information comprises at least one of the following: the position of the profiling block, the position of the second inner tab detection assembly and shooting parameters of the second inner tab detection assembly.

The detection assembly can be conveniently debugged and spot detected until the detection assembly passes the spot detection, so that the detection accuracy of the bare cell detection system can be effectively improved.

In some implementations of the second aspect, the calibration piece of the contoured surface includes at least one gray area within any one of the contoured large surface, the contoured top surface, the contoured bottom surface, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab outer surface, and the contoured anode tab inner surface, and in the case where the number of gray areas is a plurality of the gray areas, the gray levels of the plurality of gray areas are different;

generating a spot inspection result of each detection component according to each spot inspection image, wherein the spot inspection result comprises:

acquiring a first area image corresponding to each gray area in a point detection image by using an upper computer aiming at the point detection image shot by each detection assembly, and determining gray information of each first area image;

And comparing the gray level information of each first area image with the reference gray level information of each gray level area to generate a point detection result of the first shooting parameter of each detection assembly.

In some implementations of the second aspect, in any one of the contoured large face, the contoured top face, the contoured bottom face, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab inner surface, the calibration piece of the contoured surface includes at least one patterned area, where the number of patterned areas is a plurality of the patterned areas are similar in shape and different in area size;

acquiring second area images corresponding to each graphic area in the point detection images by aiming at the point detection images shot by each detection assembly through the upper computer, and determining area information of each second area image;

comparing the area information of each second area image with the reference area information of each graphic area to generate a spot inspection result of the second shooting parameters of each detection assembly.

In some implementations of the second aspect, generating a spot check result for each detection component from each spot check image includes:

Under the condition that the spot inspection result of the first shooting parameter and the spot inspection result of the second shooting parameter are both passing detection, the spot inspection result of the detection station is passing detection;

And under the condition that at least one of the spot inspection result of the first shooting parameter and the spot inspection result of the second shooting parameter is the detection failure, the detection result of the detection station is the detection failure.

In a third aspect, the present application provides a method for detecting a bare cell, including:

Under the condition that the bare cell is conveyed to a detection station corresponding to the main body detection assembly through the conveying line, the main body detection assembly shoots the large surface of the main body of the bare cell, the top surface of the main body and the bottom surface of the main body to obtain a large-surface image, a top surface image and a bottom surface image, wherein the bare cell further comprises a cathode tab and an anode tab extending out of the top surface of the main body;

under the condition that the bare cell is conveyed to a detection station of the first inner tab detection assembly through the conveying line, the inner side surface of the cathode tab of the bare cell is shot through the first inner tab detection assembly, and an outer surface image of the cathode tab is obtained;

Under the condition that the bare cell is conveyed to a detection station of the outer lug detection assembly through the conveying line, the outer side surface of the cathode lug and the outer side surface of the anode lug of the bare cell are shot through the outer lug detection assembly, and an outer surface image of the cathode lug and an outer surface image of the anode lug are obtained;

Under the condition that the bare cell is conveyed to a detection station of the second inner tab detection assembly through the conveying line, the inner side surface of the anode tab is shot through the second inner tab detection assembly, and an image of the inner surface of the anode tab is obtained;

and detecting the large-area image, the top-surface image, the bottom-surface image, the cathode lug inner surface image, the cathode lug outer surface image, the anode lug outer surface image and the anode lug inner surface image by an upper computer to obtain the surface detection result of the bare cell.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

fig. 1 is a schematic structural diagram of a bare cell detection system according to some embodiments of the present application;

fig. 2 is a schematic flow chart of a bare cell detection method according to some embodiments of the present application;

fig. 3 is a schematic diagram illustrating an arrangement of a bare cell detection station according to some embodiments of the present application;

FIG. 4 is a schematic block diagram of some embodiments of the present application;

FIG. 5 is a schematic diagram of another block configuration according to some embodiments of the present application;

FIG. 6 is a schematic diagram of a block configuration according to still another embodiment of the present application;

fig. 7 is a schematic flow chart of a spot inspection method of a bare cell detection system according to some embodiments of the present application;

FIG. 8 is a flow chart of a spot inspection method of another bare cell detection system according to some embodiments of the present application;

FIG. 9 is a flow chart of a spot inspection method of a bare cell inspection system according to some embodiments of the present application;

Fig. 10 is a schematic structural diagram of a calibration member according to some embodiments of the present application.

Reference numerals in the specific embodiments are as follows:

41. Profiling a large surface; 42. profiling the top surface; 43. profiling the bottom surface;

44. Profiling the inner surface of the cathode lug; 45. profiling the outer surface of the cathode lug;

46. profiling the inner surface of the anode tab; 47. profiling the outer surface of the anode tab.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

The term "and/or" in the present application is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In the present application, the character "/" generally indicates that the front and rear related objects are an or relationship.

In the embodiments of the present application, the same reference numerals denote the same components, and detailed descriptions of the same components are omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are merely illustrative and should not be construed as limiting the application in any way.

The term "plurality" as used herein refers to two or more (including two).

The term "parallel" in the present application includes not only the case of absolute parallelism but also the case of substantially parallelism as is conventionally recognized in engineering; meanwhile, "vertical" includes not only the case of absolute vertical but also the case of substantially vertical as conventionally recognized in engineering.

With the development of new energy technology, the battery is increasingly widely applied, for example, to mobile phones, notebook computers, battery cars, electric automobiles, electric airplanes, electric ships, electric toy automobiles, electric toy ships, electric toy airplanes, electric tools and the like. The bare cell is taken as an important component of the battery, and the quality state of the bare cell is also more and more important.

At present, whether the surface of the bare cell is qualified or not is generally detected in a visual detection mode, but as a plurality of surfaces of the bare cell are required to be detected, different cameras are required to be configured on each surface of the bare cell respectively in order to adapt to the conditions of different surfaces, so that the number and the variety of required cameras are large, the positions of the cameras are scattered, and whether the surface of the bare cell is qualified or not is easily caused, and the efficiency and the accuracy of detection results are low.

For example, a bare cell may serve as an electrode assembly, wherein the battery cell generally includes an electrode assembly. The bare cell includes a positive electrode, a negative electrode, and a separator. During the charge and discharge of the battery cell, active ions (e.g., lithium ions) are inserted and extracted back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, can play a role in preventing the positive electrode and the negative electrode from being short-circuited, and can enable active ions to pass through. The bare cell can be a winding structure, and an anode plate and a cathode plate in the bare cell are wound into the winding structure by way of example. The bare cell can also be a lamination structure, and for example, a plurality of positive plates and negative plates in the bare cell can be respectively arranged, and a plurality of positive plates and a plurality of negative plates are alternately laminated.

In the related art, in order to improve the detection accuracy of the surface of the bare cell, a manual inspection mode is often adopted to detect or spot check the surface of the bare cell one by one. However, with the increasing requirements of the surface production process of the bare cell on quality and the increasing of production speed, the manual inspection mode not only brings great working pressure to the detection personnel, but also can have the problems of undetected detection, low working efficiency and the like, and accordingly, the labor cost is higher.

Based on the above consideration, in order to improve efficiency and accuracy of a surface detection result of a bare cell, the embodiment of the application provides a bare cell detection system, which comprises a conveying line, a main body detection component of the bare cell, a first inner tab detection component, an outer tab detection component, a second inner tab detection component and an upper computer. Under the condition that the surface of the bare cell needs to be detected, the conveying line can convey the bare cell to the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly and the second inner tab detection assembly respectively. Each detection component can be automatically aligned to the corresponding surface of the bare cell, so that the surface image of the bare cell is automatically collected, and finally, the detection result of the surface of the battery can be generated by identifying the surface image of each surface of the bare cell through an upper computer. Based on this, can effectively use manpower sparingly, and confirm the testing result through the host computer, can also improve detection efficiency to and the accuracy of testing result.

The following first describes a bare cell detection system according to an embodiment of the present application in detail with reference to fig. 1. Referring to fig. 1, a conveyor line 10 is configured to convey a bare cell through a main body detection assembly, a first inner tab detection assembly, an outer tab detection assembly, and a second inner tab detection assembly of the bare cell, where the bare cell includes a main body, and a cathode tab and an anode tab extending out of a top surface of the main body;

The main body detection assembly 21 is used for shooting a large surface of the main body, a top surface of the main body and a bottom surface of the main body under the condition that the bare cell reaches a bare cell main body detection station to obtain a large surface image, a top surface image and a bottom surface image;

The first inner tab detection assembly 22 is configured to capture an inner surface of a cathode tab of the bare cell when the bare cell reaches the first inner tab detection station, so as to obtain an inner surface image of the cathode tab;

The outer tab detection component 23 is used for shooting the outer side surface of the cathode tab and the outer side surface of the anode tab of the bare cell under the condition that the bare cell reaches a tab detection station, so as to obtain an outer surface image of the cathode tab and an outer surface image of the anode tab;

the second inner tab detection assembly 24 is configured to capture an inner surface of the anode tab when the bare cell reaches the second inner tab detection station, so as to obtain an image of the inner surface of the anode tab;

the upper computer 30 is configured to detect a large-area image, a top-surface image, a bottom-surface image, an inner-surface image of the cathode tab, an outer-surface image of the anode tab, and an inner-surface image of the anode tab, and obtain a surface detection result of the bare cell.

For example, a conveying path of the conveying line may be preconfigured in the bare cell detection system, and a main body detection station corresponding to the main body component, a first inner tab detection station corresponding to the first inner tab detection component, an outer tab detection station corresponding to the outer tab detection component, and a second inner tab detection station corresponding to the second inner tab detection component are set on the conveying path.

Under the condition that the bare cell reaches the main body detection station, the main body detection assembly can shoot the large surface of the main body, the top surface of the main body and the bottom surface of the main body, and a large-surface image, a top surface image and a bottom surface image are obtained.

Optionally, the main body detection assembly may include three cameras corresponding to the large surface, the top surface and the bottom surface respectively, and after the bare cell reaches the main body detection station, the three cameras may be controlled by the lower computer to perform shooting, so that a large surface image, a top surface image and a bottom surface image of the bare cell may be obtained. After the main body detection assembly shoots, the main body detection assembly can send the shot large-area image, the shot top-surface image and the shot bottom-surface image to the upper computer.

The bare cell further comprises a cathode tab and an anode tab extending out of the top surface of the main body, wherein the anode tab and the cathode tab are arranged on the top surface of the bare cell along the length direction of the bare cell, the inner side surface of the cathode tab is opposite to the inner side surface of the anode tab along the length direction of the bare cell, and the outer side surface of the cathode tab is opposite to the outer side surface of the anode tab along the length direction of the bare cell.

Under the condition that the bare cell reaches the first inner tab detection station, the first inner tab detection can shoot the inner side surface of the cathode tab. Optionally, the first inner tab detecting assembly may include a camera for photographing an inner side surface of the cathode tab.

After the first inner tab detection assembly finishes shooting, the shot inner surface image of the cathode tab can be sent to the upper computer.

Under the condition that the bare cell reaches the outer lug detection station, the outer lug detection can shoot the outer side surface of the cathode lug and the outer side surface of the anode lug. Alternatively, the outer tab detecting assembly may include a camera for photographing an outer side surface of the cathode tab and a camera for photographing an outer side surface of the anode tab.

After the outer lug detection assembly finishes shooting, the shot outer surface image of the cathode lug and the shot outer surface image of the anode lug can be sent to an upper computer.

Under the condition that the bare cell reaches the second inner tab detection station, the second inner tab detection can shoot the inner side surface of the anode tab. Optionally, a camera for photographing the inner side surface of the anode tab may be included in the second inner tab detecting assembly.

After the second inner tab detection assembly finishes shooting, the shot inner side surface of the cathode tab can be shot by the first inner tab detection under the condition that the bare cell reaches the first inner tab detection station. Optionally, the first inner tab detecting assembly may include a camera for photographing an inner side surface of the cathode tab.

In some embodiments, the upper computer may be a device including a processor and memory storing computer program instructions. The computer program instructions may be a neural network model for identifying an image, or may be instructions for performing a logical operation on image data. A central processing unit, or a specific integrated circuit, may be included in a processor, or may be configured to implement one or more integrated circuits of embodiments of the present application. The memory may include mass storage for information or instructions. Alternatively, the memory may be internal or external to the host computer. The processor reads and executes the computer program instructions stored in the memory, so that the large-area image, the top surface image, the bottom surface image, the cathode lug inner surface image, the cathode lug outer surface image, the anode lug outer surface image and the anode lug inner surface image are respectively identified, and the surface detection result of the bare cell is obtained.

According to the embodiment of the application, under the condition that the surface of the bare cell needs to be detected, the conveyor line can respectively convey the bare cell to the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly and the second inner tab detection assembly. Each detection component can be automatically aligned to the corresponding surface of the bare cell, so that the surface image of the bare cell is automatically collected, and finally, the detection result of the surface of the battery can be generated by identifying the surface image of each surface of the bare cell through an upper computer. Based on this, can effectively use manpower sparingly, and confirm the testing result through the host computer, can also improve detection efficiency to and the accuracy of testing result.

Fig. 2 is a flow chart of a method for detecting a bare cell according to an embodiment of the present application, and with reference to fig. 2, the method for detecting a bare cell may include steps 201 to 205.

Step 201, under the condition that a bare cell is conveyed to a detection station corresponding to a main body detection assembly through a conveying line, shooting a large surface of the main body of the bare cell, a top surface of the main body and a bottom surface of the main body through the main body detection assembly to obtain a large surface image, a top surface image and a bottom surface image, wherein the bare cell further comprises a cathode tab and an anode tab extending out of the top surface of the main body;

step 202, under the condition that a bare cell is conveyed to a detection station of a first inner tab detection assembly through a conveying line, shooting the inner side surface of a cathode tab of the bare cell through the first inner tab detection assembly to obtain an outer surface image of the cathode tab;

Step 203, under the condition that a bare cell is conveyed to a detection station of an outer tab detection assembly through a conveying line, shooting the outer side surface of a cathode tab and the outer side surface of an anode tab of the bare cell through the outer tab detection assembly to obtain an outer surface image of the cathode tab and an outer surface image of the anode tab;

Step 204, under the condition that the bare cell is conveyed to a detection station of a second inner tab detection assembly through a conveying line, shooting the inner side surface of the anode tab through the second inner tab detection assembly to obtain an image of the inner surface of the anode tab;

And 205, detecting the large-area image, the top-surface image, the bottom-surface image, the inner surface image of the cathode tab, the outer surface image of the anode tab and the inner surface image of the anode tab by an upper computer to obtain a surface detection result of the bare cell.

Fig. 3 is a schematic setting diagram of a bare cell detection station according to an embodiment of the present application, and with reference to fig. 3, the first station 1 is a detection station corresponding to a main body detection component, the second station 2 is a detection station of a first inner tab detection component, the third station 3 is a detection station of a tab detection component, and the fourth station 4 is a detection station of a second inner tab detection component, where it is understood that positions of the stations may be set according to actual detection requirements, and the present application is not limited thereto.

Optionally, steps 201 to 204 are used to indicate that the conveyor line may respectively convey the bare cells to the detection stations corresponding to the main body detection assembly, the first inner tab detection assembly, and the second inner tab detection assembly of the outer tab detection assembly, respectively, instead of specifically limiting the conveying sequence. The conveying sequence of the detection stations respectively corresponding to the main body detection assembly, the first inner tab detection assembly and the outer tab detection assembly can be determined according to the actual sequence of the detection stations respectively corresponding to the main body detection assembly, the first inner tab detection assembly and the outer tab detection assembly in the bare cell.

According to the embodiment of the application, the conveyor line can respectively convey the bare cell to the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly and the second inner tab detection assembly. Each detection component can be automatically aligned to the corresponding surface of the bare cell, so that the surface image of the bare cell is automatically collected, and finally, the detection result of the surface of the battery can be generated by identifying the surface image of each surface of the bare cell through an upper computer. Based on this, can effectively use manpower sparingly, and confirm the testing result through the host computer, can also improve detection efficiency to and the accuracy of testing result.

In some embodiments, in order to improve the accuracy of the detection result of the output die surface of the die cell detection system, each detection component in the die cell detection system may also be spot-detected before the die cell detection system performs detection, or according to a preset detection period.

Specifically, fig. 4 is a schematic structural view of a profiling block provided by an embodiment of the present application, fig. 5 is a schematic structural view of another profiling block provided by an embodiment of the present application, fig. 6 is a schematic structural view of yet another profiling block provided by an embodiment of the present application, and as shown in fig. 4, 5 and 6, the profiling block is matched with the structure of a bare cell, and includes a profiling large surface corresponding to the large surface of the bare cell, a profiling top surface corresponding to the top surface of the bare cell, a profiling bottom surface corresponding to the bottom surface of the bare cell, a profiling cathode tab inner surface corresponding to the inner side surface of the cathode tab, a profiling anode tab inner surface corresponding to the inner side surface of the anode tab, and a profiling anode tab outer surface corresponding to the inner side surface of the anode tab.

Continuing to refer to fig. 4,5 and 6, the contoured large surface 41, the contoured top surface 42, the contoured bottom surface 43, the contoured cathode tab inner surface 44, the contoured cathode tab outer surface 45, the contoured anode tab inner surface 46 and the contoured anode tab outer surface 47 are all provided with calibration pieces, wherein the calibration pieces positioned on different contoured surfaces of the contoured block are similar in shape and different in area.

In the bare cell detection system, the conveying line is also used for conveying the profiling block through the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly and the second inner tab detection assembly, and the profiling block comprises a profiling main body, and a cathode profiling tab and an anode profiling tab which extend out of the top surface of the profiling main body;

By way of example, the profiling block may be a product made to imitate a real die, the shape of the profiling block being consistent with the shape of the real die, the size of the profiling block being consistent with the size of the real die. For example, the main body part of the real bare cell is rectangular, and the main body part of the profiling block is rectangular; the top surface of the main body of the real bare cell extends out of an anode tab and a cathode tab, and the top surface of the main body of the profiling block extends out of a profiling anode tab and a profiling cathode tab.

For example, the outline dimension of the profiling block can be designed according to the dimension of the blue-book cell drawing, the thickness of the profiling block is designed according to the length of the anode diaphragm, the problem that the pole lug inner measuring prism collides with the spot inspection block is avoided, the step is designed according to the dimension of the narrowest pole lug, the step is designed according to the width of the pole lug of the blue-book cell, the dissolution pattern of the camera is convenient to check, and the piece attaching space is designed according to the dimension of the checking piece on each profiling surface of the profiling block, for example, after the piece attaching space attached to the profiling surface corresponds to each checking piece, the checking piece can be reserved with 2-3mm space redundancy in the piece attaching space, and the checking piece is convenient to replace and attach again.

In the bare cell detection system, the output line can respectively convey the bare cell to the main body detection assembly, the first inner tab detection assembly, and detection stations respectively corresponding to the outer tab detection assembly and the second inner tab detection assembly, so that each detection station can shoot the profiling block.

Specifically, the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly and the second inner tab detection assembly can respectively shoot and obtain images of each profiling surface of the profiling block.

After the upper computer acquires the images of the profiling surfaces of the profiling blocks, the upper computer can identify whether the images comprise calibration pieces or not and detect the positions of the calibration pieces so as to determine whether the positions of all detection assemblies need to be corrected, and the upper computer can also identify image data such as gray values of the calibration pieces in the images so as to determine whether parameters of cameras in all detection assemblies need to be adjusted or not.

According to the embodiment of the application, the calibration piece for checking each checking working point is integrated on the surface of the profiling block which is consistent with the shape and the size of the real bare cell, so that on one hand, each calibration piece is convenient to store, and on the other hand, the checking process of the bare cell can be automatically simulated, the labor cost is saved, the checking result is more referential, and the checking of each checking component can be executed in the running process of the bare cell system, so that the equipment loss caused by the shutdown of the bare cell checking system can be effectively reduced.

In some embodiments, the calibration piece comprises at least one gray area within any one of the contoured large surface, the contoured top surface, the contoured bottom surface, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab outer surface, and the contoured anode tab inner surface, and in the case where the number of gray areas is a plurality, the gray levels of the plurality of gray areas are different;

Fig. 10 is a schematic structural diagram of a calibration piece according to an embodiment of the present application, and in combination with fig. 10, a plurality of gray scale regions with different gray scales may be included in the calibration piece. For example, a gradation region 501, a gradation region 502, a gradation region 503, and a gradation region 504. It can be seen that the gray values differ between the gray region 501, the gray region 502, the gray region 503, and the gray region 504.

Alternatively, the gray scales (0-255) of the plurality of gray scale regions may be distributed in a percentage gradient from shallow to deep, and adjacent two gray scale tolerances may differ by 20 gray scale values. The upper computer determines the gray information of each first area image by acquiring the first area image corresponding to each gray area, so that the gray information of each first area image is compared with the reference gray information of each gray area, and a point detection result of the first shooting parameter of each detection assembly is generated. The first photographing parameter may include a white balance parameter of the camera.

According to the embodiment of the application, the gray level information of the gray level region in the image is compared with the reference gray level information of the gray level region, so that the comparison result of the image can be accurately obtained, and whether each detection assembly can acquire reliable image data or not can be accurately judged.

In some embodiments, the calibration piece of the profiling surface comprises at least one pattern area in any one profiling surface of the profiling large surface, the profiling top surface, the profiling bottom surface, the profiling cathode tab inner surface, the profiling cathode tab outer surface, the profiling anode tab outer surface and the profiling anode tab inner surface, and in the case that the number of the pattern areas is a plurality of the pattern areas, the shapes of the pattern areas are similar, and the areas are different in size;

Alternatively, in the calibration piece, the positional relationship of the pattern region and the gradation region may be completely overlapped, partially overlapped, or misaligned without limitation. A plurality of graphic areas may also be included in the calibration piece. Alternatively, the graphical region includes, but is not limited to, a regular shape such as a circle, triangle, rectangle, pentagon, etc., and may also include an irregular shape.

Alternatively, the gradation areas and the pattern areas may be provided in one-to-one correspondence in each of the calibration pieces. For ease of understanding, the description below will take a circular example, with continued reference to fig. 10, where the graphic region is located within the grayscale region, i.e., the grayscale region coincides with the graphic region and the grayscale region coincides with the geometric center of the graphic region. Continuing with the illustration of FIG. 10, graphical region 505, graphical region 506, graphical region 507, and graphical region 508. It can be seen that the areas between graphic region 505, graphic region 506, graphic region 507, and graphic region 508 are different.

Optionally, the calibration piece may include an outer frame and a main body portion, the outer frame is disposed around the main body portion, and the gray scale area and the graphic area are disposed in the main body portion.

In some embodiments, multiple pattern areas of different area sizes may be included in the calibration piece. For example, as shown in connection with fig. 10, the difference in diameter between adjacent two patterned areas may be 0.2 millimeters.

And corresponding to each detection component, the upper computer generates a spot inspection result of the second shooting parameter of each detection component by identifying the graphic region in the calibration piece and comparing the area information of the graphic region with the reference area information of the graphic region. Illustratively, the second photographing parameter is, for example, a camera lens distortion parameter, a pixel millimeter conversion ratio, or the like.

According to the embodiment of the application, the comparison result of the images can be accurately obtained by comparing the area information of the second area image with the reference area information of each graphic area, so that whether each detection assembly can acquire reliable image data or not can be accurately judged.

In some embodiments of the application, the bare cell detection system further comprises a lower computer; specifically, the upper computer is also used for sending an image acquisition instruction to the lower computer; the lower computer is used for responding to the image acquisition instruction and generating a control instruction; and the conveying line is also used for responding to the control instruction and conveying the bare cell or the profiling block among the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly and the second inner tab detection assembly.

Specifically, the upper computer sends an image acquisition instruction to the lower computer, the lower computer generates a control instruction under the condition that the lower computer receives the image acquisition instruction, and then the conveying line can convey the bare cell or the profiling block to a detection station corresponding to the target detection assembly based on the control instruction. Therefore, the linkage of the upper computer, the lower computer and the conveying line is realized, the automation degree of the detection process of the bare cell detection system is improved, and the conveying line conveys the bare cell or the profiling block when receiving the image acquisition instruction, so that the loss of the bare cell detection system is reduced.

Based on the same inventive concept as the bare cell detection system provided by the embodiment of the application, the embodiment of the application also provides a spot detection method of the bare cell detection system. Fig. 7 is a schematic flow chart of a spot inspection method of a bare cell detection system according to an embodiment of the present application, and with reference to fig. 7, the spot inspection method of the bare cell detection system may include steps 301 to 305.

Step 301, when the profiling block is conveyed to a detection station corresponding to the main body detection assembly through the conveying line, the main body detection assembly shoots a profiling large surface, a profiling top surface and a profiling bottom surface of the profiling block, and a profiling block large surface image, a profiling block top surface image and a profiling block bottom surface image are obtained;

Step 302, under the condition that the profiling block is conveyed to a detection station of a first inner tab detection assembly through a conveying line, the inner surface of a profiling cathode tab of the profiling block is shot through the first inner tab detection assembly, and a first image is obtained;

step 303, under the condition that the profiling block is conveyed to a detection station of the outer lug detection assembly through a conveying line, the outer lug detection assembly shoots the outer surface of the profiling cathode lug and the outer surface of the profiling anode lug of the profiling block, and a second image of the outer surface of the profiling cathode lug and a third image of the outer surface of the profiling anode lug are obtained;

Step 304, under the condition that the profiling block is conveyed to a detection station of a second inner tab detection assembly through a conveying line, the inner surface of a profiling anode tab of the profiling block is shot through the second inner tab detection assembly to obtain a fourth image, wherein calibration pieces are arranged on the profiling large surface, the profiling top surface, the profiling bottom surface, the inner surface of the profiling cathode tab, the outer surface of the profiling cathode tab, the inner surface of the profiling anode tab and the outer surface of the profiling anode tab, and the calibration pieces positioned on different profiling surfaces of the profiling block are similar in shape and different in area;

In step 305, when the upper computer receives any one of the spot inspection images of the large-area image of the copying block, the top-surface image of the copying block, the bottom-surface image of the copying block, the first image, the second image, the third image and the fourth image, the upper computer generates a spot inspection result of the spot inspection image corresponding to the detection component according to the spot inspection image.

In some embodiments, when the point detection result of the main body detection assembly is not passing, the upper computer outputs first adjustment information of the main body detection assembly, and returns to the step of shooting the profiling large surface, the profiling top surface and the profiling bottom surface of the profiling block through the main body detection assembly to obtain a profiling block large surface image, a profiling block top surface image and a profiling block bottom surface image, wherein the first adjustment information comprises at least one of the following: the position of the profiling block, the position of the main body detection assembly and shooting parameters of the main body detection assembly;

Based on this, in the case that the spot inspection result of each detection component is not passed, it is explained that the spot inspection component needs to be debugged, and optionally, the object of debugging includes, but is not limited to, the position of the profiling block, the position of the detection component, the shooting parameters of the detection component, and the like.

According to the embodiment of the application, the detection assembly can be conveniently debugged and spot-detected until the detection assembly passes the spot-detection, so that the detection accuracy of the bare cell detection system can be effectively improved.

In some embodiments, the calibration piece of the profiling surface comprises at least one gray area in any one profiling surface of the profiling large surface, the profiling top surface, the profiling bottom surface, the profiling cathode tab inner surface, the profiling cathode tab outer surface, the profiling anode tab outer surface and the profiling anode tab inner surface, and in the case that the number of the gray areas is a plurality of, gray levels of the gray areas are different;

In some embodiments, generating a spot result for each detection component from each spot image includes: under the condition that the spot inspection result of the first shooting parameter and the spot inspection result of the second shooting parameter are both passing detection, the spot inspection result of the detection station is passing detection; and under the condition that at least one of the spot inspection result of the first shooting parameter and the spot inspection result of the second shooting parameter is the detection failure, the detection result of the detection station is the detection failure.

Specifically, after each spot inspection image is obtained by the upper computer, each spot inspection image can be input into the recognition model, and a spot inspection result of a first shooting parameter and a spot inspection result of a second shooting parameter can be generated corresponding to each spot inspection image, wherein the spot inspection result of the first shooting parameter can be passed or not passed, and the spot inspection result of the second shooting parameter can be passed or not passed.

Based on the embodiment of the application, the detection assemblies are verified by combining the two verification features of the profiling surface, so that whether each detection assembly can acquire reliable image data can be accurately judged.

In order to more clearly illustrate the point inspection process of the detection component in the bare cell detection system according to the embodiment of the present application, the point inspection method is described below with reference to a specific embodiment.

Fig. 8 is a flowchart of a spot inspection method of another die-core detection system according to an embodiment of the present application, and fig. 9 is a flowchart of a spot inspection method of another die-core detection system according to an embodiment of the present application, where, in combination with fig. 8 and fig. 9, the spot inspection method may include steps 701 to 721.

Step 701, conveying the profiling block to a main body detection assembly through a lower computer control conveying line;

Step 702, a main body detection assembly is controlled by a lower computer to shoot a large profiling surface, a top profiling surface and a surface profiling of a profiling block, so as to obtain a large profiling block image, a top profiling block image and a bottom profiling block image;

Step 703, determining, by the host computer, each gray scale region in each of the contoured block large-area image, the contoured block top-surface image, and the contoured block bottom-surface image, and each pattern region in each contoured surface;

Step 704, generating a spot inspection result of the main body detection assembly through an upper computer according to the gray scale area in each profiling surface image and the reference gray scale information of each gray scale area and according to the reference area information of each graph area and each graph area in each profiling surface;

If the point detection result of the main body detection component is not passing, step 705 is entered;

If the click result of the main body detection component is passing, step 706 is entered;

step 705, outputting the first adjustment information through the upper computer, and returning to step 702;

The first adjustment information may include at least one of: the position of the profiling block, the position of the main body detection assembly and shooting parameters of the main body detection assembly.

Step 706, conveying the profiling block to the first inner tab detection assembly through a lower computer control conveying line;

step 707, controlling the first inner tab detection assembly to shoot the inner side surface of the profiling cathode tab through the lower computer to obtain a first image;

step 708, determining a gray area in the first image by the upper computer, and determining each graphic area in the first image;

Step 709, generating a spot inspection result of the first inner tab detection assembly by the upper computer according to the gray scale area in the first image and the reference gray scale information of each gray scale area and according to each graphic area in the first image and the reference area information of each graphic area;

Step 710 is entered when the spot detection result of the first inner tab detection assembly is not passing;

if the spot detection result of the first inner tab detection component is passing, the method proceeds to step 711;

step 710, outputting second adjustment information through the upper computer, and returning to step 707;

the second adjustment information may include at least one of: the position of the profiling block, the position of the first inner pole detection assembly and shooting parameters of the first inner pole detection assembly.

Continuing to combine with the illustration of fig. 8, in step 711, the copying block is conveyed to the outer tab detection assembly by the lower computer control conveying line;

step 712, controlling the outer ear detection assembly to shoot the outer side surface of the profiling cathode electrode lug through the lower computer to obtain a second image, and shooting the outer surface of the profiling anode electrode lug to obtain a third image;

step 713, determining, by the host computer, a gray scale region in each of the second image and the third image, and determining each of the graphic regions in each of the second image and the third image;

step 714, generating, by the upper computer, a spot inspection result of the outer tab detection assembly according to the gray scale area in each of the second image and the third image and the reference gray scale information of each of the gray scale areas and according to the reference area information of each of the graphic areas in each of the second image and the third image;

if the spot detection result of the outer tab detection component is not passing, step 715 is entered;

if the spot detection result of the outer tab detection assembly is passing, step 716 is entered;

step 715, outputting third adjustment information through the upper computer, and returning to step 712;

the third adjustment information may include at least one of: the position of the profiling block, the position of the outer electrode detection assembly and shooting parameters of the outer electrode detection assembly.

Step 716, conveying the profiling block to a second inner tab detection assembly through a lower computer control conveying line;

step 717, the lower computer controls the second inner ear detection assembly to shoot the inner side surface of the profiling anode electrode lug, so as to obtain a fourth image;

Step 718, determining, by the host computer, a gray scale region in the fourth image, and determining each graphic region in the fourth image;

Step 719, generating, by the upper computer, a spot inspection result of the second inner tab detection component according to the gray scale region in the fourth image and the reference gray scale information of each gray scale region, and according to each graphic region in the fourth image and the reference area information of each graphic region;

Step 720 is entered when the spot detection result of the second inner tab detection assembly is not passing;

If the point detection result of the second inner tab detection component is passing, step 721 is entered;

step 720, outputting fourth adjustment information through the upper computer, and returning to step 717;

The fourth adjustment information may include at least one of: the position of the profiling block, the position of the second inner pole detection assembly and shooting parameters of the second inner pole detection assembly.

And 721, conveying the profiling block out of the bare cell detection system through a lower computer control conveying line.

According to the embodiment of the application, under the condition that the fixed profiling block of each detection station reaches the detection station of each detection assembly, each detection station can shoot to obtain the image of the corresponding profiling surface of each detection station, and then the upper computer can judge the spot detection result of each detection station based on the image of the corresponding profiling surface of each detection station, so that the labor participation in the whole process is less, and the spot detection efficiency and the spot detection accuracy are effectively improved.

It is understood that when the "detection component" is separately present in the embodiment of the present application, it may refer to any one of the main body detection component, the first inner tab detection component, the outer tab detection component, and the second inner tab detection component.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective 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 encompasses all technical solutions falling within the scope of the claims.

Claims

1. A bare cell detection system, comprising:

The conveying line is used for conveying the bare cell to pass through a main body detection assembly, a first inner tab detection assembly, an outer tab detection assembly and a second inner tab detection assembly of the bare cell, wherein the bare cell comprises a main body, and a cathode tab and an anode tab which extend out of the top surface of the main body;

The main body detection assembly is used for shooting a large surface of the main body, the top surface of the main body and the bottom surface of the main body under the condition that the bare cell reaches a bare cell main body detection station to obtain a large surface image, a top surface image and a bottom surface image;

The outer tab detection assembly is used for shooting the outer side surface of the cathode tab and the outer side surface of the anode tab of the bare cell under the condition that the bare cell reaches an outer tab detection station, so as to obtain an outer surface image of the cathode tab and an outer surface image of the anode tab;

The upper computer is used for detecting the large-area image, the top-surface image, the bottom-surface image, the cathode lug inner surface image, the cathode lug outer surface image, the anode lug outer surface image and the anode lug inner surface image to obtain a surface detection result of the bare cell;

The conveying line is further used for conveying a profiling block to pass through the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly and the second inner tab detection assembly, and the profiling block comprises a profiling main body, and a cathode profiling tab and an anode profiling tab which extend out of the top surface of the profiling main body;

The profiling block is matched with the structure of the bare cell, and comprises a profiling large surface corresponding to the large surface of the bare cell, a profiling top surface corresponding to the top surface of the bare cell, a profiling bottom surface corresponding to the bottom surface of the bare cell, a profiling cathode tab inner surface corresponding to the inner side surface of a cathode tab, a profiling cathode tab outer surface corresponding to the outer side surface of the cathode tab, a profiling anode tab inner surface corresponding to the inner side surface of an anode tab and a profiling anode tab outer surface corresponding to the inner side surface of the anode tab;

The profiling large surface, the profiling top surface, the profiling bottom surface, the profiling cathode lug inner surface, the profiling cathode lug outer surface, the profiling anode lug inner surface and the profiling anode lug outer surface are all provided with calibration pieces, wherein the calibration pieces positioned on different profiling surfaces of the profiling block are similar in shape and different in area;

any one of the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly and the second inner tab detection assembly is further used for shooting an image of a corresponding profiling surface of the detection assembly to obtain a spot detection image under the condition that the profiling block reaches a detection station corresponding to the detection assembly;

The upper computer is further used for generating a spot inspection result of each detection component according to each spot inspection image.

2. The system of claim 1, wherein the system further comprises a controller configured to control the controller,

In any one of the profiling large surface, the profiling top surface, the profiling bottom surface, the profiling cathode tab inner surface, the profiling cathode tab outer surface, the profiling anode tab outer surface and the profiling anode tab inner surface, a calibration piece in the profiling surface comprises at least one gray scale area, and when the number of the gray scale areas is a plurality of the gray scale areas, the gray scale levels of the gray scale areas are different;

The upper computer is specifically configured to obtain, for the spot inspection image captured by each detection component, a first area image corresponding to each gray area in the spot inspection image, determine gray information of each first area image, compare the gray information of each first area image with reference gray information of each gray area, and generate a spot inspection result of a first capturing parameter of each detection component.

3. The system of claim 1, wherein the system further comprises a controller configured to control the controller,

In any one of the profiling large surface, the profiling top surface, the profiling bottom surface, the profiling cathode tab inner surface, the profiling cathode tab outer surface, the profiling anode tab outer surface and the profiling anode tab inner surface, a calibration piece in the profiling surface comprises at least one graph area, and when the number of the graph areas is a plurality of the graph areas, the shapes of the graph areas are similar, and the areas are different in size;

The upper computer is specifically configured to obtain, for each of the spot inspection images captured by the detection component, a second area image corresponding to each of the graphic areas in the spot inspection image, determine area information of each of the second area images, compare the area information of each of the second area images with reference area information of each of the graphic areas, and generate a spot inspection result of a second capturing parameter of each of the detection components.

4. The system of claim 1, wherein the bare cell detection system further comprises a lower computer;

The conveying line is further used for responding to the control instruction and conveying the bare cell or the profiling block among the main body detection assembly, the first inner tab detection assembly, the outer tab detection assembly and the second inner tab detection assembly.

5. A spot inspection method of a bare cell detection system, the method comprising:

Under the condition that the profiling block is conveyed to a detection station of an outer lug detection assembly through a conveying line, the outer lug detection assembly shoots the outer surface of the profiling cathode lug and the outer surface of the profiling anode lug of the profiling block, and a second image of the outer surface of the profiling cathode lug and a third image of the outer surface of the profiling anode lug are obtained;

Under the condition that the profiling block is conveyed to a detection station of a second inner tab detection assembly through a conveying line, the inner surface of a profiling anode tab of the profiling block is shot through the second inner tab detection assembly to obtain a fourth image, wherein calibration pieces are arranged on the profiling large surface, the profiling top surface, the profiling bottom surface, the profiling cathode tab inner surface, the profiling cathode tab outer surface, the profiling anode tab inner surface and the profiling anode tab outer surface, and the calibration pieces positioned on different profiling surfaces of the profiling block are similar in shape and different in area;

And under the condition that the upper computer receives any point detection image of the profiling block large-area image, the profiling block top surface image, the profiling block bottom surface image, the first image, the second image, the third image and the fourth image, generating a point detection result of a point detection image corresponding to a detection component according to the point detection image.

6. The method of claim 5, wherein the method further comprises:

Outputting, by the upper computer, first adjustment information of the main body detection assembly when the spot inspection result of the main body detection assembly is not passed, and returning to the step of capturing, by the main body detection assembly, the profile modeling large surface, the profile modeling top surface and the profile modeling bottom surface of the profile modeling block to obtain a profile modeling block large surface image, a profile modeling block top surface image and a profile modeling block bottom surface image, wherein the first adjustment information includes at least one of the following: the position of the profiling block, the position of the main body detection assembly and shooting parameters of the main body detection assembly;

outputting third adjustment information of the outer tab detection assembly through the upper computer under the condition that the spot detection result of the outer tab detection assembly is not passed, and returning to the step of shooting the outer surface of the profiling cathode tab and the outer surface of the profiling anode tab of the profiling block through the outer tab detection assembly to obtain a second image of the outer surface of the profiling cathode tab and a third image of the outer surface of the profiling anode tab, wherein the third adjustment information comprises at least one of the following: the position of the profiling block, the position of the outer tab detection assembly and shooting parameters of the outer tab detection assembly;

Outputting fourth adjustment information of the second inner tab detection assembly through the upper computer under the condition that the spot detection result of the second inner tab detection assembly is not passed, and returning to the step of shooting the inner surface of the profiling anode tab of the profiling block through the second inner tab detection assembly to obtain a fourth image, wherein the fourth adjustment information comprises at least one of the following: the position of the profiling block, the position of the second inner tab detection assembly and the shooting parameters of the second inner tab detection assembly.

7. The method of claim 5, wherein the step of determining the position of the probe is performed,

In any one of the profiling large surface, the profiling top surface, the profiling bottom surface, the profiling cathode tab inner surface, the profiling cathode tab outer surface, the profiling anode tab outer surface and the profiling anode tab inner surface, a calibration piece of the profiling surface comprises at least one gray scale region, and when the number of the gray scale regions is a plurality of the gray scale regions, the gray scales of the gray scale regions are different;

Generating a spot inspection result of each detection component according to each spot inspection image, wherein the spot inspection result comprises the following steps:

acquiring a first area image corresponding to each gray area in the spot inspection image by the upper computer aiming at the spot inspection image shot by each detection assembly, and determining gray information of each first area image;

and comparing the gray level information of each first area image with the reference gray level information of each gray level area to generate a spot inspection result of the first shooting parameter of each detection assembly.

8. The method of claim 7, wherein the calibration piece of the contoured surface includes at least one patterned area within any one of the contoured large face, the contoured top face, the contoured bottom face, the contoured cathode tab inner surface, the contoured cathode tab outer surface, the contoured anode tab inner surface, and where the number of patterned areas is a plurality, the patterned areas are similar in shape and different in area size;

Acquiring second area images corresponding to each graphic area in the spot inspection images by the upper computer aiming at the spot inspection images shot by each detection assembly, and determining area information of each second area image;

Comparing the area information of each second area image with the reference area information of each graphic area to generate a spot inspection result of the second shooting parameter of each detection assembly.

9. The method of claim 8, wherein generating a spot result for each of the detection components from each of the spot images comprises:

And under the condition that at least one of the spot detection result of the first shooting parameter and the spot detection result of the second shooting parameter is the detection failure, the detection result of the detection station is the detection failure.

10. A method for detecting a bare cell, the method comprising:

Under the condition that the bare cell is conveyed to a detection station corresponding to a main body detection assembly through a conveying line, shooting a large surface of a main body of the bare cell, a top surface of the main body and a bottom surface of the main body through the main body detection assembly to obtain a large surface image, a top surface image and a bottom surface image, wherein the bare cell further comprises a cathode tab and an anode tab extending out of the top surface of the main body;

under the condition that the bare cell is conveyed to a detection station of a first inner tab detection assembly through a conveying line, the inner side surface of a cathode tab of the bare cell is shot through the first inner tab detection assembly, and an image of the inner surface of the cathode tab is obtained;

Under the condition that a bare cell is conveyed to a detection station of an outer lug detection assembly through a conveying line, the outer side surface of a cathode lug and the outer side surface of an anode lug of the bare cell are shot through the outer lug detection assembly, and a cathode lug outer surface image and an anode lug outer surface image are obtained;

Under the condition that the bare cell is conveyed to a detection station of a second inner tab detection assembly through a conveying line, the inner side surface of the anode tab is shot through the second inner tab detection assembly, and an image of the inner surface of the anode tab is obtained;

Detecting the large-area image, the top-surface image, the bottom-surface image, the cathode lug inner surface image, the cathode lug outer surface image, the anode lug outer surface image and the anode lug inner surface image by an upper computer to obtain a surface detection result of the bare cell;