Roller-pressed pole piece detection method, device, electronic equipment and computer storage medium

Abstract

The present application relates to the field of image processing technology, and more particularly to a method, device, electronic device and computer storage medium for detecting rolled pole pieces, which performs positioning detection on a target rolled pole piece to obtain a first detection result, detects the leakage foil area of ​​the target rolled pole piece to obtain a second detection result, detects the foil alignment of the target rolled pole piece to obtain a third detection result, and generates a qualified detection report of the target rolled pole piece based on the first detection result, the second detection result and the third detection, thereby realizing automatic detection and improving detection accuracy and detection efficiency.

Description

Technical Field

[0001] The present application relates to the field of image processing technology, and in particular to a method, device, electronic equipment and computer storage medium for detecting rolled pole pieces. Background Art

[0002] Rolling electrode sheets is an important step in the manufacture of lithium-ion batteries, which involves compacting electrode materials through a roller press to improve the electrical properties and density of the materials. In this process, it is crucial to control the thickness, uniformity and surface quality of the materials, which directly affects the capacity, cycle life and safety of the battery.

[0003] Because the traditional roll-pressed electrode inspection method often relies on manual inspection, which is slow and prone to human error. In modern manufacturing, especially battery manufacturing, the production speed is fast and high precision is required, so online inspection is an important means to improve production efficiency and quality. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a method, device, electronic equipment and computer storage medium for detecting a rolled pole piece, which can realize automatic detection and improve detection accuracy and detection efficiency.

[0005] The first aspect of the present application provides a method for detecting a rolled pole piece, the method comprising:

[0006] Performing positioning detection on the target rolled pole piece to obtain a first detection result;

[0007] Detecting the leaking foil area of ​​the target rolled electrode sheet to obtain a second detection result;

[0008] Detecting the foil alignment of the target rolled electrode sheet to obtain a third detection result;

[0009] A test report on the quality of the target rolled electrode sheet is generated based on the first test result, the second test result and the third test result.

[0010] In an optional embodiment, the performing positioning detection on the target rolled electrode sheet to obtain the first detection result includes:

[0011] When it is detected that the target rolled electrode sheet arrives at the first station, acquiring a first image of the target rolled electrode sheet;

[0012] Determine the rolled electrode sheet edge of the target rolled electrode sheet and the aluminum plate edge of the production line edge of the first station according to the first image;

[0013] The first detection result is determined based on the rolled electrode edge and the production line edge aluminum plate edge.

[0014] In an optional embodiment, determining the first detection result according to the rolled electrode edge and the aluminum plate edge at the production line edge includes:

[0015] Measuring a first spacing distance between the edge of the rolled electrode and the edge of the aluminum plate at the edge of the production line;

[0016] Comparing the first interval distance with a first preset threshold;

[0017] When it is determined that the first spacing distance does not meet the first preset threshold, the first detection result is obtained that the positioning detection of the target rolled electrode piece is qualified;

[0018] When it is determined that the first spacing distance satisfies the first preset threshold, the first detection result is obtained as failure in the positioning detection of the target rolled electrode piece.

[0019] In an optional embodiment, the detecting the leakage foil area of ​​the target rolled electrode sheet to obtain the second detection result includes:

[0020] When it is detected that the target rolled electrode sheet arrives at the second station, acquiring a second image of the target rolled electrode sheet;

[0021] Determine the foil leakage area of ​​the target rolled electrode sheet in the second image;

[0022] Comparing the foil leakage area of ​​the foil leakage region with a second preset threshold;

[0023] When it is determined that the leaking foil area does not meet the second preset threshold, the second detection result is obtained as the leaking foil area detection of the target rolled electrode sheet is qualified;

[0024] When it is determined that the leaking foil area meets the second preset threshold, the second detection result is obtained that the leaking foil area detection of the target rolled electrode sheet is unqualified.

[0025] In an optional embodiment, the detecting the foil alignment of the target rolled electrode sheet to obtain a third detection result includes:

[0026] When it is detected that the target rolled electrode sheet arrives at the third station, acquiring a third image of the target rolled electrode sheet;

[0027] The third detection result is determined according to the second image and the third image.

[0028] In an optional implementation, determining the third detection result according to the second image and the third image includes:

[0029] Determine a second spacing distance between an edge of the composite rolled electrode sheet of the target rolled electrode sheet on the first direction surface and an edge of the aluminum plate at the production line edge of the third station according to the third image;

[0030] Determine a third spacing distance between an edge of the composite rolled electrode sheet of the target rolled electrode sheet on the second direction surface and an edge of the aluminum plate of the production line edge of the second station according to the second image;

[0031] Calculating a distance difference between the second interval distance and the third interval distance;

[0032] Comparing the distance difference with a third preset threshold;

[0033] When it is determined that the distance difference does not meet the third preset threshold, the third detection result is obtained that the foil alignment detection of the target rolled electrode sheet is qualified;

[0034] When it is determined that the distance difference satisfies the third preset threshold, the third detection result is obtained that the foil alignment detection of the target rolled electrode sheet is unqualified.

[0035] In an optional embodiment, the method further comprises:

[0036] When the first detection result is that the positioning detection of the target rolled electrode piece is unqualified, obtaining first offset data of the target rolled electrode piece, and correcting the rolling equipment according to the first offset data;

[0037] When the second detection result is that the leakage foil area detection of the target rolled electrode sheet is unqualified, obtaining second offset data of the target rolled electrode sheet, and correcting the rolling equipment according to the second offset data;

[0038] When the third detection result is that the foil alignment detection of the target rolled electrode sheet is unqualified, third offset data of the target rolled electrode sheet is obtained, and the rolling equipment is corrected according to the third offset data.

[0039] A second aspect of the present application provides a rolled pole piece detection device, the device comprising:

[0040] A first detection module is used to perform positioning detection on a target rolled pole piece to obtain a first detection result;

[0041] A second detection module is used to detect the leakage foil area of ​​the target rolled electrode sheet to obtain a second detection result;

[0042] A third detection module is used to detect the foil alignment of the target rolled electrode sheet to obtain a third detection result;

[0043] A generation module is used to generate a qualification test report of the target rolled electrode sheet based on the first test result, the second test result and the third test.

[0044] A third aspect of the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the rolled pole piece detection method when executing the computer program.

[0045] A fourth aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the above-mentioned rolled pole piece detection method are implemented.

[0046] In summary, the method, device, electronic device and computer storage medium for detecting rolled pole pieces provided in the present application perform positioning detection on the rolled pole pieces, detect the leakage foil area of ​​the rolled pole pieces, and detect the foil alignment of the rolled pole pieces. The entire detection process is automated. Compared with manual detection of rolled pole pieces, the detection accuracy and efficiency are greatly improved, time and human resources are saved, and production is facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is a schematic diagram of a roll-pressed pole piece detection system shown in an embodiment of the present application;

[0048] Figure 2 is a flow chart of a method for detecting a rolled pole piece shown in an embodiment of the present application;

[0049] Figure 3 is a schematic diagram of a detection station for roller-pressed pole piece detection shown in an embodiment of the present application;

[0050] Figure 4 is a schematic diagram of a first station of a roll-pressed pole piece detection shown in an embodiment of the present application;

[0051] Figure 5 is a schematic diagram of a second station for rolling pole piece detection shown in an embodiment of the present application;

[0052] Figure 6 is a schematic diagram of a third station for roller pressing pole piece detection shown in an embodiment of the present application;

[0053] Figure 7 It is a flow chart of a method for detecting the size of a rolled pole piece shown in an embodiment of the present application;

[0054] Figure 8 is a functional module diagram of a rolled pole piece detection device shown in an embodiment of the present application;

[0055] Fig. 9 It is a structural schematic diagram of an electronic device shown in an embodiment of the present application. DETAILED DESCRIPTION

[0056] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0057] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the invention can be combined interchangeably without conflicting with each other.

[0058] Reference Figure 1 , which is a schematic diagram of a rolled pole piece detection system shown in an embodiment of the present application.

[0059] In some embodiments, the rolled electrode sheet detection system 1 includes a first workstation 10, a second workstation 20 and a third workstation 30. The first workstation 10 (hereinafter referred to as workstation 1), the second workstation 20 (hereinafter referred to as workstation 2) and the third workstation 30 (hereinafter referred to as workstation 3) are all used to detect rolled electrode sheets.

[0060] During the production process of rolled electrode sheets, when it is necessary to inspect the rolled electrode sheets to determine whether they meet the requirements, the conveyor belt on the production line drives the rolled electrode sheets through stations 1, 2 and 3 respectively. Station 1 is used to detect the positioning of the rolled electrode sheets, station 2 is used to detect the leakage foil area of ​​the rolled electrode sheets, and station 3 is used to detect the foil alignment of the rolled electrode sheets. For details, please refer to Figure 3 When the roll-pressed pole piece needs to be inspected, first configure the global industrial camera and telecentric lens, and use the corresponding light source to illuminate the roll-pressed pole piece so that a clear image can be obtained later.

[0061] In some embodiments, when the conveyor belt transfers the rolled pole sheet to station 1, station 1 performs a positioning detection on the rolled pole sheet; when it is determined that the detection result of the positioning detection of the rolled pole sheet is qualified, the rolled pole sheet that has passed the positioning detection is transferred to station 2 via the conveyor belt, so that station 2 detects the leakage foil area of ​​the rolled pole sheet; when it is determined that the detection result of the leakage foil area of ​​the rolled pole sheet is passed, the rolled pole sheet that has passed the leakage foil area detection is transferred to station 3 via the conveyor belt, so that station 3 detects the foil alignment of the rolled pole sheet; when it is determined that the detection result of the foil alignment of the rolled pole sheet is qualified, it can be determined that the detection result of the rolled pole sheet is qualified, that is, only when the detection results of stations 1, 2 and 3 are all qualified can it be determined that the rolled pole sheet meets the requirements. In other embodiments, a conveyor belt can be used to transport the rolled electrode sheet through station 1, station 2 and station 3 respectively, and the rolled electrode sheet can be inspected in turn by station 1, station 2 and station 3. If the inspection result of any station is unqualified, the inspection result of the rolled electrode sheet can be determined as unqualified. Only when the inspection results of station 1, station 2 and station 3 are all qualified, can the inspection result of the rolled electrode sheet be determined as qualified.

[0062] Reference Figure 2 , which is a flow chart of a method for detecting a rolled pole piece according to an embodiment of the present application, and the method for detecting a rolled pole piece includes the following steps.

[0063] S21, performing positioning detection on the target rolled electrode sheet to obtain a first detection result.

[0064] The target rolled electrode piece refers to any rolled electrode piece that needs to be tested. Figure 4 , at workstation 1, a 5-megapixel global industrial camera (first industrial camera, hereinafter referred to as CCD1) is configured with a resolution of 2448×2048 and a field of view of 38.4mm×32.3mm to ensure that enough details of the roll-pressed pole piece can be captured, and a telecentric lens is used on CCD1 to reduce image distortion caused by distance changes and improve measurement accuracy. In addition, a ring light source can be used to illuminate the roll-pressed pole piece on the production line to achieve clear and uniform lighting effects and reduce shadows and reflections. Then a light source controller with a 4-channel digital controller and a 5-meter-long light source extension cable are equipped to flexibly adjust the light source position and brightness on the production line. It should be noted that in order for CCD1 to capture a clear image of the roll-pressed pole piece, ensure that the working distance from the CCD1 lens to the roll-pressed pole piece is between 210mm and 250mm; at the same time, adjust the distance from the light source to the roll-pressed pole piece to between 130mm and 170mm to obtain the best imaging effect.

[0065] When it is detected that the target rolled electrode sheet arrives at station 1, CCD1 is started, and an image (first image) including the target rolled electrode sheet is captured through a telecentric lens. Specifically, after starting CCD1, the pulse signal or digital signal output by the encoder is read, and the signal output by the encoder is counted. Each time a valid pulse signal or digital signal is received, the counter value increases by 1. When the counter value reaches a preset trigger value (such as 100), the shooting instruction is executed. After receiving the shooting instruction, CCD1 starts to expose and capture the first image.

[0066] After acquiring the first image, CCD1 can send the first image to the terminal electronic device so that the electronic device processes the first image, such as performing noise elimination and contrast enhancement on the first image. Specifically, CCD1 can use filtering algorithms (such as Gaussian filtering, median filtering, etc.) to remove noise in the first image, improve the signal-to-noise ratio of the first image, and provide clean image data for subsequent processing. Then, the contrast of the first image is enhanced by methods such as histogram equalization and contrast stretching, so that the positioning features (such as edges, textures, etc.) of the rolled electrode sheet are more prominent, which is convenient for subsequent target recognition and positioning. Further, the electronic device can use image processing technology (such as edge detection, contour extraction, etc.) to perform edge detection on the pre-processed first image to extract the edge features of the rolled electrode sheet and the edge features of the production line of the first station, that is, the rolled electrode sheet edge of the target rolled electrode sheet and the aluminum plate edge of the production line edge of the first station. In addition, the electronic device can also use contour search algorithms (such as Hough transform, chain code tracking, etc.) to further determine the accurate contours of the rolled electrode sheet edge and the aluminum plate edge of the production line edge. During the edge contouring process, the electronic device can select representative points (such as the endpoints and intersections of the edges) as measurement reference points, and record the coordinate values ​​of the measurement reference points in the image coordinate system. It should be noted that before measuring the distance (first spacing distance) between the edge of the rolled pole piece and the edge of the aluminum plate at the edge of the production line, it is necessary to calibrate the camera of CCD1, establish a mapping relationship between the image coordinate system and the world coordinate system, substitute the coordinates of the measurement reference point in the image coordinate system into the mapping relationship, and calculate the coordinate value of the measurement reference point in the world coordinate system (ie, the actual physical coordinate system). Then, the first spacing distance between the edge of the rolled pole piece and the edge of the aluminum plate at the edge of the production line is calculated based on the coordinate value.

[0067] Further, the electronic device may compare the first spacing distance with a preset threshold (first preset threshold) to determine whether the first spacing distance satisfies the first preset threshold. When it is determined that the first spacing distance is greater than the first preset threshold, it can be determined that the first spacing distance satisfies the first preset threshold, and further determines that the first detection result is that the positioning detection of the target rolled electrode sheet is unqualified. Otherwise, the first detection result is determined that the positioning detection of the target rolled electrode sheet is qualified. In some embodiments, the electronic device can determine the value of the first preset threshold according to the product specifications, production requirements, etc. of the rolled electrode sheet.

[0068] In other embodiments, when CCD1 captures the first image, CCD1 may directly process the first image according to the same embodiment as above to obtain a first detection result.

[0069] Through the above optional implementation, the high-precision global industrial camera combined with a telecentric lens, annular light source and precision control can achieve accurate positioning detection of the target rolled pole piece. By optimizing the camera configuration and light source layout, image distortion and shadows can be effectively reduced, and image quality can be improved. Combined with image processing technology, edge features are automatically extracted and key spacing is calculated, achieving efficient and accurate positioning detection. In addition, by comparing the preset threshold, it is possible to quickly determine whether the pole piece positioning is qualified, thereby improving the intelligence level of the production line and the product quality control capabilities.

[0070] In some embodiments, when it is determined that the first detection result is that the positioning detection of the target rolled pole piece is unqualified, that is, when the first spacing distance exceeds the first preset threshold value, indicating that the position of the target rolled pole piece is offset, the electronic device can determine the first offset data based on the difference between the first spacing distance and the first preset threshold value, and send a correction signal to the correction controller of the rolling equipment based on the first offset data to adjust the mechanical structure or control system of the rolling equipment to correct the position offset of the rolled pole piece.

[0071] After the positioning detection of the target rolled electrode sheet is completed at station 1 and the first detection result is qualified, the target rolled electrode sheet is transferred to the next station through the production line for rolled electrode sheet compounding, and the target rolled electrode sheet that meets the completion is transferred to station 2 through the conveyor belt on the production line, so that station 2 can detect the leaking foil area of ​​the target rolled electrode sheet.

[0072] It should be noted that station 1 is used to test rolled electrode sheets that have not undergone roll-pressed electrode sheet composite, while stations 2 and 3 are used to test rolled electrode sheets that have undergone roll-pressed electrode sheet composite. Roll-pressed electrode sheet composite refers to pressing two or more (usually including positive electrode sheets and negative electrode sheets, corresponding to the front and back sides of rolled electrode sheets) together through a rolling process to form a composite rolled electrode sheet.

[0073] S22, detecting the leaking foil area of ​​the target rolled electrode sheet to obtain a second detection result.

[0074] In some embodiments, reference is made to Figure 5 , on station 2, a 5-megapixel global industrial camera (the second industrial camera, hereinafter referred to as CCD2) is also configured, with a resolution of 2448×2048 and a field of view of 59.5mm×50mm, and a telecentric lens is used on CCD2 to reduce image distortion caused by distance changes and improve measurement accuracy. In addition, the open-hole surface light source can also be used to illuminate the roll-pressed pole pieces on the production line to achieve clear and uniform lighting effects and reduce shadows and reflections. Then, a light source controller with a 4-channel digital controller and a 5-meter-long light source extension cable are equipped to flexibly adjust the position and brightness of the light source on the production line. It should be noted that in order for CCD2 to capture a clear image of the roll-pressed pole piece, ensure that the working distance from the CCD2 lens to the roll-pressed pole piece is between 208mm and 248mm; at the same time, adjust the distance from the light source to the roll-pressed pole piece to between 217.5mm to obtain the best imaging effect.

[0075] According to the same embodiment as step S21, when it is detected that the target rolled electrode sheet arrives at station 2, CCD2 is started, and an image (second image) including the target rolled electrode sheet is captured through a telecentric lens. After acquiring the second image, CCD2 can send the second image to a terminal electronic device so that the electronic device can filter and denoise the second image. Specifically, the electronic device can use a filtering algorithm (such as Gaussian filtering, median filtering, etc.) to remove noise and fine particles in the second image, further remove random noise in the second image, improve the signal-to-noise ratio of the second image, and provide a high-quality image for subsequent processing.

[0076] Since the leaking foil area will reveal the color of the aluminum plate below, which contrasts with the color of the surrounding materials, the electronic device can use a spot analysis method to detect whether there is a leaking foil area in the target rolled electrode. Specifically, the electronic device can convert the second image into a binary image according to a preset threshold. In a binary image, a spot detection algorithm (such as connected domain analysis, morphological operations, etc.) is used to identify areas that are different from the surrounding pixel color or brightness, that is, the leaking foil area. In some embodiments, since there may be noise or other non-leaking foil spots in the binary image, the electronic device can screen the detected spots by analyzing the size, shape, position and other characteristics of the spots, and exclude spots that do not meet the conditions.

[0077] When it is determined that there is a leaking foil area in the target rolled electrode, the pixel points of the leaking foil area are then extracted. Among them, the pixel points represent the actual position, shape and size of the leaking foil. Then, according to the number of pixels in the extracted leaking foil area, the leaking foil area of ​​the leaking foil area is obtained by calculating the product of the pixels in the x direction and the y direction. Further, the electronic device can compare the calculated leaking foil area with a preset threshold (a second preset threshold) to determine whether the leaking foil area meets the second preset threshold. When it is determined that the leaking foil area is greater than the second preset threshold, it can be determined that the leaking foil area meets the second preset threshold, and the second detection result is further determined to be that the leaking foil detection of the target rolled electrode is unqualified, otherwise, the second detection result is determined to be that the leaking foil detection of the target rolled electrode is qualified.

[0078] In other embodiments, when CCD2 captures the second image, CCD2 may directly process the second image according to the same embodiment as described above to obtain a second detection result.

[0079] Through the above optional implementation, by configuring a telecentric lens and a suitable light source, the image acquisition quality is improved and distortion and interference are reduced. Secondly, the spot analysis method is used to accurately identify the leaking foil area and calculate the area, and the detection result is determined after comparing it with the preset threshold, which effectively improves the quality control capability and detection efficiency of the production line.

[0080] In some embodiments, when it is determined that the second detection result is that the leakage foil area detection of the target rolled electrode sheet is unqualified, that is, the leakage foil area exceeds the second preset threshold, the electronic device can determine the second offset data according to the position and area size of the leakage foil area, and send a correction signal to the correction controller of the rolling equipment based on the second offset data to adjust the coating parameters, rolling pressure, etc. of the rolling equipment to ensure the quality of the subsequently produced rolled electrode sheets.

[0081] When the leakage foil area detection of the target rolled electrode sheet is completed at workstation 2, and the second detection result is qualified, the target rolled electrode sheet is flipped over through the production line, and the flipped target rolled electrode sheet is transferred to workstation 3 through the conveyor belt of the production line, so that workstation 3 performs foil alignment detection on the target rolled electrode sheet.

[0082] S23, detecting the foil alignment of the target rolled electrode sheet to obtain a third detection result.

[0083] In some embodiments, reference is made to Figure 6, on station 3, a 5-megapixel full-industrial camera (the third industrial camera, hereinafter referred to as CCD3) is also configured, with a resolution of 2448×2048 and a field of view of 59.5mm×50mm, and a telecentric lens is used on CCD3 to reduce image distortion caused by distance changes and improve measurement accuracy. In addition, the open-hole surface light source can also be used to illuminate the roll-pressed pole pieces on the production line to achieve clear and uniform lighting effects and reduce shadows and reflections. Then, a light source controller with a 4-channel digital controller and a 5-meter-long light source extension cable are equipped to flexibly adjust the position and brightness of the light source on the production line. It should be noted that in order for CCD3 to capture a clear image of the roll-pressed pole piece, ensure that the working distance from the CCD3 lens to the roll-pressed pole piece is between 208mm and 248mm; at the same time, adjust the distance from the light source to the roll-pressed pole piece to between 217.5mm to obtain the best imaging effect. Among them, the working distance from the CCD3 lens to the rolled pole piece, and the distance from the light source to the rolled pole piece can be fine-tuned to obtain the best imaging effect.

[0084] According to the same embodiment as step S21, when it is detected that the target rolled electrode sheet arrives at station 3, CCD3 is started, and an image (third image) including the target rolled electrode sheet is captured through a telecentric lens, wherein the third image includes the first direction surface of the target rolled electrode sheet (hereinafter referred to as surface A), so the electronic device can determine the distance between the composite rolled electrode sheet edge of the target rolled electrode sheet on surface A and the edge of the aluminum plate at the edge of the production line based on the third image, which is called the second spacing distance. Specifically, the electronic device can first pre-process the third image, for example, using a filtering algorithm (such as Gaussian filtering, median filtering, etc.) to remove noise and fine particles in the third image, further remove random noise in the third image, improve the signal-to-noise ratio of the third image, and provide a high-quality image for subsequent processing. Then, the electronic device can use an edge detection algorithm (such as a Canny edge detector, a Sobel operator, etc.) to identify the edge contours of the composite rolled electrode sheet edge and the edge of the aluminum plate at the edge of the production line in the third image, and use a contour extraction algorithm (such as Hough transform, chain code tracking, etc.) to extract the detected edge contours to obtain complete edge lines. On the extracted contour, the electronic device can select representative points (such as edge endpoints, intersections, etc.) as measurement reference points, and convert the coordinates of the measurement reference points in the image coordinate system into coordinates in the world coordinate system. Based on the converted coordinate values, the actual distance between the edge of the composite roll-pressed electrode sheet on the A surface and the edge of the aluminum plate at the edge of the production line can be calculated, that is, the second spacing distance.

[0085] Since the second image acquired by station 2 includes the second direction surface of the target rolled electrode sheet (hereinafter referred to as surface B), the electronic device can determine the distance between the composite rolled electrode sheet edge of the target rolled electrode sheet on surface B and the edge of the aluminum plate at the edge of the production line based on the second image, which is called the third spacing distance. The third spacing distance can be determined according to the same embodiment as the above-mentioned determination of the second spacing distance.

[0086] After determining the second spacing distance and the third spacing distance, the electronic device can calculate the distance difference between the second spacing distance and the third spacing distance, and compare the distance difference with a preset threshold (third preset threshold) to determine whether the distance difference meets the third preset threshold. When it is determined that the distance difference is greater than the third preset threshold, it can be determined that the distance difference meets the third preset threshold, and further determine that the third detection result is that the foil alignment test of the target rolled electrode piece is unqualified. Otherwise, the third detection result is determined that the foil alignment test of the target rolled electrode piece is qualified.

[0087] In other embodiments, after CCD2 captures the third image, CCD3 may directly process the third image according to the same embodiment as above to obtain a third detection result.

[0088] Through the above optional implementation, the alignment of the rolled electrode foil is accurately detected by high-precision industrial cameras, telecentric lenses and image processing algorithms. Secondly, by calculating the distance difference between the edge of the A side and the B side and the edge of the production line, and comparing it with the preset threshold, it is effectively determined whether the alignment is qualified, which improves the detection accuracy, reduces human errors, ensures the quality control of the production line, and improves the product yield.

[0089] In some embodiments, when it is determined that the third detection result is that the foil alignment detection of the target rolled electrode sheet is unqualified, that is, the distance difference exceeds the third preset threshold, the electronic device can determine the alignment deviation between the foils based on the distance difference, that is, the third offset data, and adjust the alignment mechanism or control system of the rolling equipment based on the third offset data to correct the alignment deviation between the foils.

[0090] S24, generating a test report on the quality of the target rolled electrode sheet based on the first test result, the second test result and the third test result.

[0091] In some embodiments, when the electronic device determines the first test result, the second test result, and the third test result, it summarizes them to form a complete test data record, that is, when the first spacing distance is less than the first preset threshold, it indicates that the positioning test of the target rolled pole piece is qualified, when the leakage foil area is less than the second preset threshold, it indicates that the leakage foil area test of the target rolled pole piece is qualified, and when the distance difference between the second spacing distance and the third spacing distance is less than the third preset threshold, it indicates that the alignment test of the target rolled pole piece is qualified. A qualification test report is generated based on the qualified positioning test, qualified leakage foil area test, and qualified alignment test of the target rolled pole piece.

[0092] In an alternative embodiment, referring to Figure 7 , the electronic device can obtain the encoder pulse signal output by the encoder, and trigger the camera to capture the image of the current position including the rolled pole piece according to the encoder pulse signal. The encoder can be installed on a moving part (such as a conveyor belt or a robotic arm) on the production line, and the encoder generates a corresponding pulse signal as the part moves. Specifically, after receiving the encoder pulse signal, the electronic device can send a shooting instruction to the camera according to a preset trigger condition (such as receiving a certain number of pulse signals each time), so that the camera captures the image of the rolled pole piece on the current production line after receiving the instruction, and the captured image is stored in the buffer for subsequent processing. Further, the electronic device can use image processing software or algorithms to analyze the image stored in the buffer, for example, it can identify the rolled pole piece in the image by edge detection, feature extraction and other methods, and measure its size and position. When it is determined that the position of the rolled pole piece deviates from the preset standard, a correction signal is calculated and sent to the correction device. At the same time, the electronic device can also use image processing algorithms (such as image transformation, pixel remapping, etc.) to adjust the position of the rolled pole piece in the image to eliminate or reduce the position deviation, and calculate the specific pixel value of the misalignment of the rolled pole piece, and correct the wrong position in the image. Next, the electronic device sends the correction signal or the corrected image data to the actuator (such as a servo motor, cylinder, etc.) on the production line, so that the actuator adjusts the position of the rolled pole piece on the production line according to the received correction signal to ensure the accuracy and consistency of the product. In addition, the corrected image, the measured size and position information, and the calculated misaligned pixel value and other data are stored in a database or file to facilitate subsequent statistical analysis, quality traceability or troubleshooting. In addition, users can also obtain real-time images and position information on the production line based on the human-computer interaction interface provided by the electronic device, and allow users to query historical data based on time, object type and other conditions, and perform statistical analysis or generate reports to achieve real-time monitoring and correction of the position of objects on the production line, ensuring accuracy and consistency in the product manufacturing process.

[0093] Reference Figure 8, which is a functional module diagram of a rolled pole piece detection device shown in an embodiment of the present application.

[0094] In some embodiments, the rolled pole piece detection device 80 may include a plurality of functional modules composed of computer program segments. The computer program of each program segment of the rolled pole piece detection device 80 may be stored in a memory of an electronic device and executed by at least one processor to perform rolled pole piece detection (see Figure 2 Description).

[0095] In this embodiment, the rolled pole piece detection device 80 can be divided into multiple functional modules according to the functions it performs. The functional modules may include: a first detection module 801, a second detection module 802, a third detection module 803, a generation module 804 and a correction module 805. The module referred to in this application refers to a series of computer program segments that can be executed by at least one processor and can complete fixed functions, which are stored in a memory. In this embodiment, the functions of each module will be described in detail in subsequent embodiments.

[0096] The first detection module 801 performs positioning detection on the target rolled electrode sheet to obtain a first detection result.

[0097] The second detection module 802 detects the leaking foil area of ​​the target rolled electrode sheet to obtain a second detection result.

[0098] The third detection module 803 detects the foil alignment of the target rolled electrode sheet to obtain a third detection result.

[0099] The generating module 804 generates a test report on the quality of the target rolled electrode sheet based on the first test result, the second test result and the third test result.

[0100] The first detection module 801 is also specifically used for: when it is detected that the target rolled electrode sheet arrives at the first workstation, obtaining a first image of the target rolled electrode sheet; determining the rolled electrode sheet edge of the target rolled electrode sheet and the production line edge aluminum sheet edge of the first workstation according to the first image; and determining the first detection result according to the rolled electrode sheet edge and the production line edge aluminum sheet edge.

[0101] The first detection module 801 is also specifically used to: measure a first spacing distance between the edge of the rolled pole piece and the edge of the aluminum plate at the edge of the production line; compare the first spacing distance with a first preset threshold; when it is determined that the first spacing distance does not meet the first preset threshold, the first detection result is obtained that the positioning detection of the target rolled pole piece is qualified; when it is determined that the first spacing distance meets the first preset threshold, the first detection result is obtained that the positioning detection of the target rolled pole piece is unqualified.

[0102] The second detection module 802 is also specifically used to: when it is detected that the target rolled electrode sheet arrives at the second workstation, obtain a second image of the target rolled electrode sheet; determine the leaking foil area of ​​the target rolled electrode sheet in the second image; compare the leaking foil area of ​​the leaking foil area with a second preset threshold; when it is determined that the leaking foil area does not meet the second preset threshold, obtain the second detection result that the leaking foil area detection of the target rolled electrode sheet is qualified; when it is determined that the leaking foil area meets the second preset threshold, obtain the second detection result that the leaking foil area detection of the target rolled electrode sheet is unqualified.

[0103] The third detection module 803 is further specifically used for: acquiring a third image of the target rolled electrode sheet when it is detected that the target rolled electrode sheet arrives at the third station; and determining the third detection result according to the second image and the third image.

[0104] The third detection module 803 is also specifically used to: determine the second spacing distance between the edge of the composite roll-pressed electrode sheet of the target roll-pressed electrode sheet on the first direction plane and the edge of the aluminum plate of the production line edge of the third station according to the third image; determine the third spacing distance between the edge of the composite roll-pressed electrode sheet of the target roll-pressed electrode sheet on the second direction plane and the edge of the aluminum plate of the production line edge of the second station according to the second image; calculate the distance difference between the second spacing distance and the third spacing distance; compare the distance difference with a third preset threshold; when it is determined that the distance difference does not meet the third preset threshold, the third detection result is obtained as the foil alignment detection of the target roll-pressed electrode sheet is qualified; when it is determined that the distance difference meets the third preset threshold, the third detection result is obtained as the foil alignment detection of the target roll-pressed electrode sheet is unqualified.

[0105] The correction module 805 is used to: when the first detection result is that the positioning detection of the target rolled electrode sheet is unqualified, obtain the first offset data of the target rolled electrode sheet, and correct the rolling equipment according to the first offset data; when the second detection result is that the leakage foil area detection of the target rolled electrode sheet is unqualified, obtain the second offset data of the target rolled electrode sheet, and correct the rolling equipment according to the second offset data; when the third detection result is that the foil alignment detection of the target rolled electrode sheet is unqualified, obtain the third offset data of the target rolled electrode sheet, and correct the rolling equipment according to the third offset data.

[0106] It should be understood that the various variations and specific embodiments of the rolled pole sheet detection method provided in the above-mentioned embodiments are also applicable to the rolled pole sheet detection device of the present embodiment. Through the above-mentioned detailed description of the rolled pole sheet detection method, those skilled in the art can clearly know the implementation method of the rolled pole sheet detection device in the present embodiment. For the sake of brevity of the specification, it will not be described in detail here.

[0107] See also Fig. 9 FIG. 1 is a schematic diagram of the structure of an electronic device according to an embodiment of the present application. In a preferred embodiment of the present application, the electronic device 9 includes a memory 91 , at least one processor 92 and at least one communication bus 93 .

[0108] Those skilled in the art should understand that Fig. 9 The structure of the electronic device shown does not constitute a limitation of the embodiments of the present application, and may be either a bus structure or a star structure. The electronic device 9 may also include more or less other hardware or software than shown in the figure, or a different component arrangement.

[0109] In some embodiments, the electronic device 9 is a device that can automatically perform numerical calculations and / or information processing according to pre-set or stored instructions, and its hardware includes but is not limited to microprocessors, application-specific integrated circuits, programmable gate arrays, digital processors, and embedded devices. The electronic device 9 may also include user equipment, which includes but is not limited to any electronic product that can interact with a user through a keyboard, mouse, remote control, touchpad, or voice control device, such as a personal computer, tablet computer, smart phone, digital camera, etc.

[0110] In the above embodiments provided in the present application, it should be understood that the disclosed methods, devices, computer-readable storage media, and electronic devices can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as multiple components or modules can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or components or modules, which can be electrical, mechanical or other forms.

[0111] The components described as separate components may or may not be physically separated, and the components shown as components may or may not be physical modules, that is, they may be located in one place or distributed on multiple network modules. Some or all of the components may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0112] In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each component may exist physically separately, or two or more modules may be integrated into one module. The above integrated modules may be implemented in the form of hardware or in the form of software functional modules.

[0113] If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0114] It should be noted that, for the convenience of description, the aforementioned method embodiments are all described as a series of action combinations, but those skilled in the art should be aware that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0115] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0116] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A method for detecting a rolled pole piece, characterized in that: The method comprises: Performing positioning detection on a target rolled electrode sheet that has not been rolled electrode sheet composited to obtain a first detection result, including: when it is detected that the target rolled electrode sheet arrives at the first station, acquiring a first image of the target rolled electrode sheet; determining the rolled electrode sheet edge of the target rolled electrode sheet and the production line edge aluminum sheet edge of the first station according to the first image; measuring a first spacing distance between the rolled electrode sheet edge and the production line edge aluminum sheet edge; comparing the first spacing distance with a first preset threshold; when it is determined that the first spacing distance does not satisfy the first preset threshold, obtaining the first detection result that the positioning detection of the target rolled electrode sheet is qualified; when it is determined that the first spacing distance satisfies the first preset threshold, obtaining the first detection result that the positioning detection of the target rolled electrode sheet is unqualified; Detecting the leaking foil area of ​​the target rolled electrode sheet after the rolled electrode sheet is compounded to obtain a second detection result, including: when it is detected that the target rolled electrode sheet arrives at the second station, acquiring a second image of the target rolled electrode sheet; The foil alignment of the target rolled electrode sheet after the rolled electrode sheet composite is detected to obtain a third detection result, including: when it is detected that the target rolled electrode sheet arrives at the third station, a third image of the target rolled electrode sheet is obtained; according to the third image, a second spacing distance between the composite rolled electrode sheet edge of the target rolled electrode sheet on the first direction surface and the aluminum plate edge of the production line edge of the third station is determined; according to the second image, a third spacing distance between the composite rolled electrode sheet edge of the target rolled electrode sheet on the second direction surface and the aluminum plate edge of the production line edge of the second station is determined; the distance difference between the second spacing distance and the third spacing distance is calculated; the distance difference is compared with a third preset threshold; when it is determined that the distance difference does not meet the third preset threshold, the third detection result is obtained that the foil alignment detection of the target rolled electrode sheet is qualified; when it is determined that the distance difference meets the third preset threshold, the third detection result is obtained that the foil alignment detection of the target rolled electrode sheet is unqualified; A test report on the quality of the target rolled electrode sheet is generated based on the first test result, the second test result and the third test result.

2. The method for detecting rolled pole pieces according to claim 1, characterized in that: After acquiring the second image of the target rolled electrode sheet, the method further includes: Determine the foil leakage area of ​​the target rolled electrode sheet in the second image; Comparing the foil leakage area of ​​the foil leakage region with a second preset threshold; When it is determined that the leaking foil area does not meet the second preset threshold, the second detection result is obtained as the leaking foil area detection of the target rolled electrode sheet is qualified; When it is determined that the leaking foil area meets the second preset threshold, the second detection result is obtained that the leaking foil area detection of the target rolled electrode sheet is unqualified.

3. The method for detecting rolled pole pieces according to any one of claims 1 to 2, characterized in that: The method further comprises: When the first detection result is that the positioning detection of the target rolled electrode piece is unqualified, obtaining first offset data of the target rolled electrode piece, and correcting the rolling equipment according to the first offset data; When the second detection result is that the leakage foil area detection of the target rolled electrode sheet is unqualified, obtaining second offset data of the target rolled electrode sheet, and correcting the rolling equipment according to the second offset data; When the third detection result is that the foil alignment detection of the target rolled electrode sheet is unqualified, third offset data of the target rolled electrode sheet is obtained, and the rolling equipment is corrected according to the third offset data.

4. A roller-pressed pole piece detection device, characterized in that: The device comprises: The first detection module is used to perform positioning detection on the target rolled electrode sheet that has not been rolled electrode sheet composited, and obtain a first detection result, including: when it is detected that the target rolled electrode sheet arrives at the first station, obtaining a first image of the target rolled electrode sheet; determining the rolled electrode sheet edge of the target rolled electrode sheet and the production line edge aluminum sheet edge of the first station according to the first image; measuring the first spacing distance between the rolled electrode sheet edge and the production line edge aluminum sheet edge; comparing the first spacing distance with a first preset threshold; when it is determined that the first spacing distance does not meet the first preset threshold, obtaining the first detection result that the positioning detection of the target rolled electrode sheet is qualified; when it is determined that the first spacing distance meets the first preset threshold, obtaining the first detection result that the positioning detection of the target rolled electrode sheet is unqualified; The second detection module is used to detect the leakage foil area of ​​the target rolled electrode sheet after the rolled electrode sheet is compounded to obtain a second detection result, including: when it is detected that the target rolled electrode sheet arrives at the second station, obtaining a second image of the target rolled electrode sheet; The third detection module is used to detect the foil alignment of the target rolled electrode sheet after the rolled electrode sheet is composited to obtain a third detection result, including: when it is detected that the target rolled electrode sheet arrives at the third station, obtaining a third image of the target rolled electrode sheet; determining a second spacing distance between the composite rolled electrode sheet edge of the target rolled electrode sheet on the first direction surface and the aluminum plate edge of the production line edge of the third station according to the third image; determining a third spacing distance between the composite rolled electrode sheet edge of the target rolled electrode sheet on the second direction surface and the aluminum plate edge of the production line edge of the second station according to the second image; calculating the distance difference between the second spacing distance and the third spacing distance; comparing the distance difference with a third preset threshold; when it is determined that the distance difference does not meet the third preset threshold, obtaining the third detection result that the foil alignment detection of the target rolled electrode sheet is qualified; when it is determined that the distance difference meets the third preset threshold, obtaining the third detection result that the foil alignment detection of the target rolled electrode sheet is unqualified; A generation module is used to generate a qualification test report of the target rolled electrode sheet based on the first test result, the second test result and the third test.

5. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the rolled pole piece detection method according to any one of claims 1 to 3 when executing the computer program.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the rolled pole piece detection method according to any one of claims 1 to 3 are implemented.

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