Detection systems, methods, apparatus, devices, storage media and program products

Abstract

The application relates to a detection system, method, device, equipment, storage medium and program product. A shooting device shoots a target object at a current station to obtain a shooting image, and sends the shooting image to a detection equipment. The detection equipment determines at least one lithium precipitation type of a strip-shaped lithium precipitation, a line-shaped lithium precipitation, a bubble-shaped lithium precipitation and a point-shaped lithium precipitation of a lithium precipitation area on an anode pole piece according to the shooting image. The target object comprises the anode pole piece obtained after disassembling an electric core. The lithium precipitation area on the anode pole piece is detected without manual visual inspection, and the detection efficiency of the lithium precipitation type of the lithium precipitation area on the anode pole piece obtained after disassembling the electric core is improved.

Description

Technical Field

[0001] This application relates to the field of electrode testing technology, and in particular to a testing system, method, apparatus, equipment, storage medium, and program product. Background Technology

[0002] Lithium-ion batteries, with their advantages of high energy density and long cycle life, have been widely used in key areas such as new energy vehicles and energy storage systems. Among them, wound cells have become the mainstream configuration due to their compact structure and high production efficiency. However, batteries can fail under complex operating conditions such as overcharging and thermal runaway. Therefore, studying the failure mechanisms of failed batteries is a core aspect of optimizing battery design.

[0003] In failure mechanism research, lithium deposition on the anode electrode of a battery is prone to occur under complex operating conditions, leading to battery failure. Therefore, the type of lithium deposition on the anode electrode has become a core and critical aspect of the entire testing process. Currently, manual visual inspection is used to determine the type of lithium deposition on the anode electrode after cell disassembly; however, this method suffers from low efficiency in lithium deposition detection. Summary of the Invention

[0004] Therefore, it is necessary to provide a detection system, method, apparatus, equipment, storage medium, and program product that can improve the detection efficiency of lithium plating type in the lithium plating region on the anode electrode obtained from disassembled battery cells, in order to address the above-mentioned technical problems.

[0005] In a first aspect, this application provides a detection system, which includes:

[0006] The imaging device is used to capture images of the target object at the current workstation and send the images to the testing equipment; the target object includes the anode sheet obtained after disassembling the battery cell;

[0007] The detection equipment is used to determine the type of lithium deposition in the lithium deposition area on the anode electrode based on the captured images; the lithium deposition type includes at least one of strip-shaped lithium deposition, linear lithium deposition, bubble-shaped lithium deposition, and dot-shaped lithium deposition;

[0008] The detection system also includes:

[0009] The controller is used to send control commands to the drive unit after the shooting device has finished shooting at the current workstation;

[0010] A driving device is used to respond to control commands and drive the imaging device to move a preset distance along the first direction of the anode sheet to the next station; the length of the anode sheet in the first direction is greater than the length of the anode sheet in the second direction.

[0011] The imaging device is also used to capture images of the anode sheet at the next work station to obtain the next captured image.

[0012] In this embodiment, the imaging device captures an image of the target object at the current workstation and sends the image to the detection device. Based on the image, the detection device determines at least one type of lithium plating on the anode electrode, including strip-shaped lithium plating, linear lithium plating, bubble-shaped lithium plating, and dot-shaped lithium plating. The target object includes the anode electrode obtained after disassembling the battery cell. This eliminates the need for manual visual inspection of the lithium plating area on the anode electrode, improving the efficiency of detecting the lithium plating type on the anode electrode obtained from disassembled battery cells. Furthermore, in response to control commands sent by the controller, the driving device moves the imaging device a preset distance along the first direction of the anode electrode to the next workstation. At the next workstation, the imaging device captures an image of the anode electrode, achieving imaging of the entire length of the anode electrode along the first direction. This facilitates subsequent analysis of images of any region of the anode electrode to obtain the lithium plating area, and then determines the lithium plating type based on the lithium plating area, achieving comprehensive detection of the entire lithium plating area of ​​the anode electrode.

[0013] In one embodiment, the detection system further includes a frame, and the driving device includes:

[0014] The transmission mechanism includes a first mating component and a second mating component that engage in meshing transmission. The first mating component is mounted on the frame and extends along the first direction.

[0015] A driving component is slidably fitted to the frame along the first direction. The shooting device is mounted on the driving component. The driving component is connected to the second fitting component and is used to drive the second fitting component to rotate, so that the driving component and the second fitting component move along the first direction.

[0016] In this embodiment, a driving device including a transmission mechanism and a driving component can drive the imaging device to move along the first direction, thereby enabling the imaging device to capture images of different areas of the anode sheet in the first direction at different work positions.

[0017] In one embodiment, the imaging device includes:

[0018] A light source assembly, which is connected to a driver, is used to provide illumination to the shooting environment in which the shooting device is located;

[0019] A camera assembly connected to the drive unit is used to take pictures of a target object when illuminated by a light source assembly; the target object also includes at least one of the following: the surfaces of a battery cell, the surfaces of a bare battery cell obtained after peeling off the outer casing of the battery cell, and a cathode electrode and a separator obtained after disassembling the battery cell.

[0020] In this embodiment, the shooting environment of the shooting device can be illuminated by the light source component, so that the camera component can take pictures of the target object under the illumination of the light source component, thereby obtaining a clearer image. This makes it easier to obtain more accurate analysis results by using the clear image.

[0021] In one embodiment, the camera component includes:

[0022] A range sensor, which is connected to the zoom lens of the camera assembly, is used to measure the distance between the zoom lens and the target object;

[0023] A zoom lens is used to adjust the focus position of the zoom lens on the target object according to the distance.

[0024] Indicator lights are used to create a light spot on the target object; the light spot is used to indicate the focus position of the zoom lens.

[0025] In this embodiment, the zoom lens can automatically adjust its focus position on the target object, thereby making the captured image clearer. In addition, an indicator light can form a light spot on the target object to indicate the focus position of the zoom lens, making it easy for staff to judge whether the zoom lens has completed autofocus based on the position of the light spot.

[0026] In one embodiment, the light source assembly includes:

[0027] The outer cover is connected to the drive unit, and the cavity formed by the outer cover is used to house the light source body;

[0028] The light source body is connected to the light source controller located outside the cavity via a cable assembly that passes through a through hole provided on the outer casing.

[0029] A cable assembly, comprising a cable and a cable entry assembly, the cable entry assembly being used to clamp the cable and seal gaps at through-holes.

[0030] The light source component in this embodiment not only provides illumination for the imaging environment, but is also suitable for application in the detection environment where the detection system is located.

[0031] In one embodiment, a detection device is used to determine the type of lithium plating on the anode electrode based on captured images and a detection model.

[0032] In this embodiment, the detection model can identify the type of lithium plating on the captured image of the anode electrode. Because the detection model has high accuracy, the accuracy of the obtained lithium plating type on the anode electrode can be improved.

[0033] In one embodiment, the detection device is used to acquire image samples of anode electrode samples obtained after disassembling the battery cell sample, as well as actual lithium plating type samples corresponding to the image samples. Based on the image samples and actual lithium plating type samples, an initial detection model is trained to obtain a detection model. The actual lithium plating type samples include at least one of strip-shaped lithium plating samples, linear lithium plating samples, bubble-shaped lithium plating samples, and dot-shaped lithium plating samples.

[0034] In this embodiment, the detection device acquires image samples of the anode electrode samples obtained after disassembling the battery cell samples, as well as actual lithium plating type samples corresponding to the image samples. Based on the image samples and actual lithium plating type samples, an initial detection model is trained to obtain a detection model, which improves the detection accuracy of the detection model. This improves the accuracy of the detection model in detecting the lithium plating type of the lithium plating region obtained from the captured images.

[0035] In one embodiment, the detection device is used to input image samples into an initial detection model, obtain the predicted lithium plating type output by the initial detection model, determine the difference between the predicted lithium plating type and the actual lithium plating type samples, and train the initial detection model based on the difference to obtain a detection model.

[0036] In this embodiment, an initial detection model is trained based on the difference between the predicted lithium plating type and the actual lithium plating type samples to obtain a detection model. The actual lithium plating type samples provide a clear learning objective and quantitative feedback for the detection model, enabling the detection model to efficiently learn the mapping relationship between input and output, thereby outputting a more accurate lithium plating type in actual detection.

[0037] In one embodiment, the detection device is used to determine the lithium plating area of ​​each lithium plating region, determine the total lithium plating area based on the lithium plating area of ​​each lithium plating region corresponding to the same lithium plating type, and determine the lithium plating level of the anode electrode area corresponding to the captured image based on the total number of lithium plating regions corresponding to the same lithium plating type, the total lithium plating area, and the maximum lithium plating area among the lithium plating areas corresponding to the same lithium plating type.

[0038] In this embodiment, the detection device determines the lithium plating area of ​​each lithium plating region, and determines the total lithium plating area based on the lithium plating area of ​​each lithium plating region corresponding to the same lithium plating type. Based on the total number of lithium plating regions corresponding to the same lithium plating type, the total lithium plating area, and the maximum lithium plating area among the lithium plating areas corresponding to the same lithium plating type, the lithium plating level of the anode electrode region corresponding to the captured image is determined. This allows the severity of lithium plating in the anode electrode region corresponding to the captured image to be known, so as to trace the battery cell based on the severity of lithium plating and improve the performance of the battery cell.

[0039] In one embodiment, the detection device is used to stitch together the images of the anode plates acquired at each station to obtain a stitched image. Based on the quotient obtained by dividing the position coordinates of the image with lithium plating in the stitched image by the total length of the anode plate, the number of turns of the image with lithium plating in the cell is determined.

[0040] In this embodiment, the detection device stitches together the images of the anode plates acquired at each workstation to obtain a stitched image. Based on the quotient obtained by dividing the position coordinates of the image with the lithium plating region in the stitched image by the total length of the anode plate, the number of winding turns of the image with the lithium plating region in the cell is determined, which facilitates the rapid tracing of the position of the lithium plating region in the stitched image based on the number of winding turns.

[0041] Secondly, this application also provides a detection method, which is applied to a detection device in a detection system, and the detection method includes:

[0042] Receive images of the target object sent by the imaging device in the detection system; the images are images obtained by the imaging device at the current workstation of the target object, and the target object includes the anode plate obtained after disassembling the battery cell;

[0043] Based on the captured images, determine the type of lithium deposition in the lithium deposition area on the anode electrode; the lithium deposition type includes at least one of strip-shaped lithium deposition, linear lithium deposition, bubble-shaped lithium deposition, and dot-shaped lithium deposition;

[0044] The method also includes:

[0045] When the imaging device completes imaging at the current station, it sends an imaging completion signal to the controller in the detection system. The imaging completion signal is used to instruct the controller to send a control command to the drive device in the detection system. The control command is used to instruct the drive device to control the imaging device to move a preset distance along the first direction of the anode sheet and then reach the next station of the current station. The anode sheet is then imaged at the next station to obtain the next image.

[0046] Receive the next image sent by the shooting device.

[0047] Thirdly, this application also provides a detection device. The detection device is disposed within the detection equipment of a detection system, and the detection device includes:

[0048] The receiving module is used to receive images of the target object sent by the imaging device in the detection system; the image is the image obtained by the imaging device at the current station of the target object, and the target object includes the anode plate obtained after the battery cell is disassembled;

[0049] The first determining module is used to determine the lithium deposition type of the lithium deposition area on the anode electrode based on the captured image; the lithium deposition type includes at least one of strip-shaped lithium deposition, linear lithium deposition, bubble-shaped lithium deposition, and dot-shaped lithium deposition;

[0050] The sending module is used to send a shooting completion signal to the controller in the detection system when the shooting device finishes shooting at the current station. The shooting completion signal is used to instruct the controller to send a control command to the drive device in the detection system. The control command is used to instruct the drive device to drive the shooting device to move a preset distance along the first direction of the anode sheet and then to the next station of the current station, where the anode sheet is shot to obtain the next image.

[0051] The receiving module is also used to receive the next captured image sent by the shooting device.

[0052] Fourthly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the steps of any of the methods described above.

[0053] Fifthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, the computer program being executed by a processor using the steps of any of the methods described above.

[0054] Sixthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, implements the steps of any of the methods described above.

[0055] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0056] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0057] Figure 1 This is a schematic diagram of the structure of a detection system provided in an embodiment of this application;

[0058] Figure 2 This is a schematic diagram of another detection system provided in an embodiment of this application;

[0059] Figure 3This is a schematic diagram of the overall structure of a driving device and a shooting device provided in an embodiment of this application;

[0060] Figure 4 This is a schematic diagram of the structure of a camera component from one perspective provided in an embodiment of this application;

[0061] Figure 5 This is a schematic diagram of the camera assembly from another perspective provided in an embodiment of this application;

[0062] Figure 6 This is a schematic diagram of the structure of a light source assembly provided in an embodiment of this application;

[0063] Figure 7 This is a schematic flowchart of a detection method provided in an embodiment of this application;

[0064] Figure 8 This is a schematic diagram of the structure of a detection device provided in an embodiment of this application;

[0065] Figure 9 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0066] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0067] Unless otherwise defined, 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 pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0068] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0069] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0070] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0071] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0072] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0073] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0074] Lithium-ion batteries, with their advantages of high energy density and long cycle life, have been widely used in key areas such as new energy vehicles and energy storage systems. Among them, wound cells have become the mainstream configuration due to their compact structure and high production efficiency. However, batteries can fail under complex operating conditions such as overcharging and thermal runaway. Therefore, studying the failure mechanisms of failed batteries is a core aspect of optimizing battery design.

[0075] In failure mechanism research, lithium deposition on the anode electrode in batteries under complex operating conditions easily leads to battery failure. Disassembling failed or used batteries, extracting electrodes, and analyzing electrode interface characteristics are crucial steps in revealing the root cause of failure. Among these, the Overcharge Resistance Test Interface Classification (ORT) is a core evaluation indicator. ORT is essentially a scientific classification system based on the degree of damage to the electrode / electrolyte interface under overcharge conditions. Its core lies in quantifying interface failure risk through multi-dimensional electrochemical, physical, and chemical characteristic parameters, providing key decision support for safety assessment, failure tracing, and recycling throughout the battery's entire lifecycle.

[0076] Currently, the lithium plating information on the anode plates obtained after disassembling the battery cell is analyzed manually by visual inspection, and the type of lithium plating is estimated based on the lithium plating information. However, there is a problem of low detection efficiency for lithium plating type.

[0077] To address the aforementioned problems, embodiments of this application provide a detection system, such as... Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a detection system provided in an embodiment of this application. The detection system includes an imaging device 11 and a detection equipment 12; the detection equipment can be a computer device.

[0078] The imaging device 11 is used to capture images of the target object at the current workstation and send the captured images to the detection device 12; the target object includes the anode plate obtained after disassembling the battery cell;

[0079] The detection device 12 is used to determine the type of lithium deposition in the lithium deposition area on the anode plate based on the captured image; the lithium deposition type includes at least one of strip-shaped lithium deposition, linear lithium deposition, bubble-shaped lithium deposition, and dot-shaped lithium deposition.

[0080] After the battery cell is disassembled, the anode sheet obtained is relatively long in the first direction. The field of view of the imaging device cannot cover the entire area along this length. That is, the imaging device can only capture a portion of the anode sheet along the first direction at the current station, resulting in a partial image of the anode sheet. After capturing images at the current station, the imaging device can be moved to the next station to capture the anode sheet again, continuing until the entire area along the first direction has been captured. If the length of the anode sheet in the first direction is greater than its length in the second direction, the imaging device can be moved to the next station manually or controlled by a drive mechanism.

[0081] The detection equipment can identify lithium plating regions in the captured images using the Canny edge detection method or the Otsu threshold segmentation method. If the lithium plating region meets the preset conditions corresponding to the preset lithium plating type, the lithium plating type of the lithium plating region is determined to be the preset lithium plating type.

[0082] Preset lithium plating types can include bar-shaped lithium plating, linear lithium plating, bubble-shaped lithium plating, and dot-shaped lithium plating.

[0083] For example, if the preset condition for the bubble-like lithium plating in the preset lithium plating type is that the diameter is not less than 0.1 mm and the lithium plating area is bulging with bubbles, and the diameter of a certain lithium plating area is not less than 0.1 mm and the lithium plating area is bulging with bubbles, then the lithium plating area meets the preset condition for the bubble-like lithium plating, and the lithium plating type of the lithium plating area can be determined to be bubble-like lithium plating.

[0084] If the preset conditions for point-like lithium deposition in the preset lithium deposition type are that the diameter is not less than 0.05 mm and not more than 0.1 mm and is in the form of discrete dots, and the diameter of a certain lithium deposition area is not less than 0.05 mm and not more than 0.1 mm, then the lithium deposition area meets the preset conditions for point-like lithium deposition, and the lithium deposition type of the lithium deposition area can be determined to be point-like lithium deposition.

[0085] If the preset conditions for the strip-shaped lithium plating type are a width of not less than 0.05 mm and a length of not less than 0.5 mm, and a certain lithium plating area has a width of not less than 0.05 mm, a length of not less than 0.5 mm, and is strip-shaped, then the lithium plating area meets the preset conditions for the strip-shaped lithium plating, and the lithium plating type of the lithium plating area can be determined to be strip-shaped lithium plating.

[0086] If the preset conditions for linear lithium plating in the preset lithium plating type are a width of not less than 0.02 mm and not more than 0.05 mm, and a length of not less than 1 mm, and a lithium plating region has a width of not less than 0.02 mm and not more than 0.05 mm, a length of not less than 1 mm, and is in the shape of a thin line, then the lithium plating region meets the preset conditions for linear lithium plating, and the lithium plating type of the lithium plating region can be determined to be linear lithium plating.

[0087] like Figure 1 and Figure 2 As shown, Figure 2 This is a schematic diagram of another detection system provided in an embodiment of this application. The detection system may further include:

[0088] The controller 13 is used to send control commands to the drive device 21 when the shooting device 11 has completed shooting at the current workstation.

[0089] Drive device 21 is used to respond to control commands to drive imaging device 11 to move a preset distance along the first direction of the anode sheet to the next station; the length of the anode sheet in the first direction is greater than the length of the anode sheet in the second direction.

[0090] The imaging device 11 is also used to capture the anode sheet at the next work station to obtain the next captured image.

[0091] The controller 13 can be a programmable logic controller (PLC). After the imaging device completes its capture, it can send the captured image to the detection device. The detection device determines that the imaging device has completed its capture based on the received image and sends a capture completion signal to the controller 13. The controller determines that the imaging device has completed its capture at the current workstation based on the capture completion signal. When the imaging device has completed its capture at the current workstation, the controller 13 sends control commands to the drive device.

[0092] Alternatively, after the camera finishes shooting, it sends a shooting completion signal to the controller. The controller responds to the shooting completion signal to determine that the camera has completed shooting at the current workstation. When the camera has completed shooting at the current workstation, the controller sends a control command to the drive device.

[0093] When the current workstation of the shooting device is the starting workstation, the controller can receive a shooting command triggered by the user and control the shooting device to start shooting in response to the shooting command.

[0094] When the shooting device finishes shooting at the current workstation, the controller can control the movement of the shooting device through the drive device. The controller can determine whether the distance the shooting device moves is equal to the preset distance. If the distance the shooting device moves is equal to the preset distance, the controller determines that the shooting device has reached the shooting workstation. If the controller determines that the shooting device has reached the shooting workstation, it controls the shooting device to start shooting.

[0095] For example, if the shooting device takes a picture every 0.5 meters, then when the controller controls the shooting device to move 0.5 meters through the drive device, it controls the shooting device to stop moving, determines that the shooting device has reached the next station, that is, the shooting device has reached the shooting station, and controls the shooting device to start shooting.

[0096] When photographing anode or cathode electrodes, the sharpness of the resulting image can be improved by controlling the flatness of the electrodes to ensure that all points on the electrode surface are within the depth of field of the imaging device. For example, the flatness of the electrode should be ≤2 mm.

[0097] In this embodiment, the imaging device captures an image of the target object at the current workstation and sends the image to the detection device. Based on the image, the detection device determines at least one type of lithium plating on the anode electrode, including strip-shaped lithium plating, linear lithium plating, bubble-shaped lithium plating, and dot-shaped lithium plating. The target object includes the anode electrode obtained after disassembling the battery cell. This eliminates the need for manual visual inspection of the lithium plating area on the anode electrode, improving the efficiency of detecting the lithium plating type on the anode electrode obtained from disassembled battery cells. Furthermore, in response to control commands sent by the controller, the driving device moves the imaging device a preset distance along the first direction of the anode electrode to the next workstation. At the next workstation, the imaging device captures an image of the anode electrode, achieving imaging of the entire length of the anode electrode along the first direction. This facilitates subsequent analysis of images of any region of the anode electrode to obtain the lithium plating area, and then determines the lithium plating type based on the lithium plating area, achieving comprehensive detection of the entire lithium plating area of ​​the anode electrode.

[0098] In one embodiment, a schematic diagram of the overall structure of the driving device and the imaging device is also provided. Figure 3 This is a schematic diagram of the overall structure of a driving device and a shooting device provided in an embodiment of this application. Figure 2 and 3 As shown, the detection system also includes a frame 23, and the driving device includes:

[0099] The transmission mechanism includes a first mating component and a second mating component that engage in a meshing transmission. The first mating component is mounted on the frame 23 and extends along the first direction.

[0100] A driving component is slidably fitted to the frame 23 along the first direction. The shooting device is mounted on the driving component. The driving component is connected to the second fitting component and is used to drive the second fitting component to rotate, so that the driving component and the second fitting component move along the first direction.

[0101] The shooting device can be directly connected to the driving component, allowing the shooting device to be mounted on the driving component. Alternatively, the driving component may also include a support member 31, to which the shooting device can be connected, and the driving component can be connected to the support member 31, allowing the shooting device to be mounted on the driving component.

[0102] The driving component can be an electric motor, rotary cylinder, etc., such as Figure 3The motor 32 shown can be mounted on the support member 31. The motor 32 is connected to the second mating member and is used to drive the second mating member to rotate, so that the driving member and the second mating member move along the first direction, thereby driving the shooting device to move along the first direction. The support member 31 may be provided with a slider, and the frame 23 is provided with a slide rail extending along the first direction. The slider and the slide rail slide in cooperation along the first direction, thereby enabling the shooting device to move along the first direction when the driving member and the second mating member move along the first direction.

[0103] The structure of the slider and the slide rail can also be replaced by a slider groove, or a guide sleeve and a guide rod, etc.

[0104] For example, such as Figure 2 As shown, the transmission mechanism may include a rack 22 as the first mating component and a gear as the second mating component. The gear meshes with the rack 22, and the motor 32 drives the gear to rotate, so that the motor 32 and the gear move in a first direction, thereby driving the shooting device to move in the first direction. Alternatively, the transmission mechanism may include a chain as the first mating component and a sprocket as the second mating component.

[0105] In one embodiment, the driving component can be fixedly installed on the frame 23, and the shooting device can be connected to the rack 22. The driving component drives the gear to rotate, thereby driving the rack and the shooting device to move in the first direction.

[0106] It should be noted that the shooting device can also be moved by a drive component via a belt drive structure or by a drive component via a lead screw structure.

[0107] In this embodiment, a driving device including a transmission mechanism and a driving component can drive the imaging device to move along the first direction, thereby enabling the imaging device to capture images of different areas of the anode sheet in the first direction at different work positions.

[0108] In one embodiment, such as Figure 3 As shown, the shooting device includes:

[0109] The light source assembly 33 is connected to the support member 31 and is used to provide illumination for the shooting environment where the shooting device is located.

[0110] The camera assembly 34 is used to take pictures of the target object when the light source assembly 33 provides illumination; the target object also includes each surface of the battery cell, each surface of the bare battery cell obtained after peeling off the outer casing of the battery cell, and at least one of the cathode electrode and the separator obtained after disassembling the battery cell.

[0111] The camera can be a line scan camera or a charge-coupled device (CCD) camera. Higher camera resolution can be used for shooting, improving single-pixel accuracy. Furthermore, when using a line scan camera, the entire length of the electrode can be captured at a single workstation, eliminating the need to stitch together multiple images to obtain a complete image of the electrode's length.

[0112] In the battery cell packaging process, a blue insulating protective film, often simply referred to as the blue film, wraps around the outside of the battery cell body. It is an original packaging component when the battery cell leaves the factory and, when not peeled off, forms the external protective structure of the battery cell together with the outer casing. Using the detection system provided in this application, images of each surface of the battery cell, including the outer casing and the blue film, can be captured. After capturing images of each surface of the battery cell with the outer casing and blue film, the outer casing can be peeled off to obtain the bare battery cell. Images of each surface of the bare battery cell can then be captured.

[0113] After obtaining the bare battery cell, it can be further disassembled to obtain the anode plate, cathode plate, and separator. The anode plate, cathode plate, and separator can then be photographed to obtain images.

[0114] All the images obtained above can be saved in the file corresponding to the battery cell for later analysis.

[0115] In this embodiment, the shooting environment of the shooting device can be illuminated by the light source component, so that the camera component can take pictures of the target object under the illumination of the light source component, thereby obtaining a clearer image. This makes it easier to obtain more accurate analysis results by using the clear image.

[0116] In one embodiment, such as Figure 4 and 5 As shown, Figure 4 This is a schematic diagram of the structure of a camera component with one viewpoint provided in an embodiment of this application. Figure 5 This is a schematic diagram of the camera assembly from another perspective provided in an embodiment of this application. Camera assembly 34 includes:

[0117] The range sensor 51 is connected to the zoom lens 52 of the camera assembly and is used to measure the distance between the zoom lens 52 and the target object.

[0118] Zoom lens 52 is used to adjust the focus position of zoom lens 52 on the target object according to the distance;

[0119] Indicator light 53 is used to form a light spot on the target object; the light spot is used to indicate the focus position of zoom lens 52.

[0120] In this embodiment, the camera assembly 34 may include a camera and a zoom lens 52. The zoom lens 52 may be a motorized zoom lens, and the range sensor may be an infrared range sensor. The zoom lens 52 can automatically adjust its focus based on the distance between the target object and the zoom lens 52 to achieve clear imaging. The principle is that the infrared light emitted by the range sensor at the front of the zoom lens 52 reaches the target object and returns to the range sensor. The range sensor can determine the time between emitting the infrared light and receiving the signal returned from the target object. Based on the product of the time and the speed of light, the distance between the target object and the zoom lens 52 can be determined. The motor mechanism inside the zoom lens 52 can adjust the focus ring to a position where the lens can achieve clear imaging at that distance, thus realizing automatic focusing.

[0121] Indicator light 53 can be a red indicator light or an indicator light of other colors.

[0122] The zoom lens 52 can be connected to the camera in the camera assembly 34 via interface 41, and the range sensor and indicator light can be located at the front of the zoom lens.

[0123] In this embodiment, the zoom lens can automatically adjust its focus position on the target object, thereby making the captured image clearer. In addition, an indicator light can form a light spot on the target object to indicate the focus position of the zoom lens, making it easy for staff to judge whether the zoom lens has completed autofocus based on the position of the light spot.

[0124] In one embodiment, such as Figure 6 As shown, Figure 6 This is a schematic diagram of a light source assembly provided in an embodiment of this application. The light source assembly includes:

[0125] The outer cover is connected to the drive unit, and the cavity formed by the outer cover is used to accommodate the light source body 63;

[0126] The light source body 63 is connected to the light source controller located outside the cavity through a cable assembly that passes through a through hole provided on the outer cover;

[0127] A cable assembly, comprising a cable and a cable entry assembly 64, the cable entry assembly 64 being used to clamp the cable and seal gaps at through-holes.

[0128] The outer casing may include a first explosion-proof outer casing 61 and a second explosion-proof outer casing 62 arranged along a first direction. The first explosion-proof outer casing 61 and the second explosion-proof outer casing 62 are two end faces of the outer casing along the first direction, which is the length direction of the outer casing. The first explosion-proof outer casing 61 and the second explosion-proof outer casing 62 can be made of high-strength metal materials and can withstand the internal explosion pressure specified by standards without permanent deformation or damage. The mating surfaces, which connect the outer casing cover and the main body, have strict processing requirements and extremely high precision requirements to achieve the quenching effect when the flame passes through the gap. This is mainly determined by the gap length and the maximum gap. Among them, the other surfaces of the outer casing, except for the two end faces along the first direction, can be made of ordinary materials or high-strength metal materials.

[0129] The light source body 63 can be an LED, preferably an LED with high photoelectric conversion efficiency and low heat generation. A large-area metal heat sink is designed for heat dissipation to meet explosion-proof requirements. A polarizer can be placed close to the light outlet of the light source body along the light emission path; the polarizer can act as a filter.

[0130] A light source controller can be a component of a light source assembly or a controller independent of the light source assembly, used to control whether the light source itself emits light.

[0131] Cable entry assembly 64 may include an explosion-proof flexible conduit and an explosion-proof cable seal. The through-holes for power and signal cables entering the housing are vulnerable points; using certified explosion-proof cable seals ensures the cables are securely clamped and sealed. Cables can be inserted into the explosion-proof flexible conduit, which isolates the cables and extends their lifespan.

[0132] The light source component in this embodiment not only provides illumination for the imaging environment, but is also suitable for application in the detection environment where the detection system is located.

[0133] In one embodiment, a detection device is used to determine the type of lithium plating on the anode electrode based on captured images and a detection model.

[0134] The detection model can include, but is not limited to, Convolutional Neural Networks (CNN) models, Recurrent Neural Networks (RNN) models, and Fully Convolutional Neural Networks (FCN) models. For example, it can include the You Only Look Once Version 8 (YOLOv8) model, a single-stage real-time object detection algorithm.

[0135] In this embodiment, the detection model can identify the type of lithium plating on the captured image of the anode electrode. Because the detection model has high accuracy, the accuracy of the obtained lithium plating type on the anode electrode can be improved.

[0136] In one embodiment, the detection device is used to acquire image samples of anode electrode samples obtained after disassembling the battery cell sample, and actual lithium plating type samples corresponding to the image samples. Based on the image samples and actual lithium plating type samples, an initial detection model is trained to obtain a detection model. The actual lithium plating type samples include at least one of strip-shaped lithium plating samples, linear lithium plating samples, bubble-shaped lithium plating samples, and dot-shaped lithium plating samples.

[0137] Image samples can be input into an initial detection model to obtain a lithium plating type prediction result. The difference between the predicted lithium plating type and the actual lithium plating type samples can be determined. Based on the difference, the parameters of the initial detection model are optimized to obtain the detection model. By training the initial detection model to obtain the detection model, the accuracy of the detection model in detecting the lithium plating type of the captured images can be improved.

[0138] In this embodiment, the detection device acquires image samples of the anode electrode samples obtained after disassembling the battery cell samples, as well as actual lithium plating type samples corresponding to the image samples. Based on the image samples and actual lithium plating type samples, an initial detection model is trained to obtain a detection model, which improves the detection accuracy of the detection model. This improves the accuracy of the detection model in detecting the lithium plating type of the lithium plating region obtained from the captured images.

[0139] In one embodiment, the detection device is used to input image samples into an initial detection model, obtain the predicted lithium plating type output by the initial detection model, determine the difference between the predicted lithium plating type and the actual lithium plating type samples, and train the initial detection model based on the difference to obtain a detection model.

[0140] In this embodiment, an initial detection model is trained based on the difference between the predicted lithium plating type and the actual lithium plating type samples to obtain a detection model. The actual lithium plating type samples provide a clear learning objective and quantitative feedback for the detection model, enabling the detection model to efficiently learn the mapping relationship between input and output, thereby outputting a more accurate lithium plating type in actual detection.

[0141] In one embodiment, the detection device is used to determine the lithium plating area of ​​each lithium plating region, determine the total lithium plating area based on the lithium plating area of ​​each lithium plating region corresponding to the same lithium plating type, and determine the lithium plating level of the anode electrode area corresponding to the captured image based on the total number of lithium plating regions corresponding to the same lithium plating type, the total lithium plating area, and the maximum lithium plating area among the lithium plating areas corresponding to the same lithium plating type.

[0142] For bubbly lithium plating, the total number of lithium plating regions, the total lithium plating area, and the maximum lithium plating area among the lithium plating areas of bubbly lithium plating regions in the captured image obtained at a workstation can be determined.

[0143] For example, if the total number of lithium deposits is less than or equal to a first preset number, the total lithium plating area is less than or equal to a first preset area, and the maximum lithium plating area is less than or equal to a first preset lithium plating area, then the degree of lithium plating of the bubble-like lithium in the captured image can be determined to be at the first level. If the total number of lithium deposits is greater than a first preset number but not greater than a second preset number, the total lithium plating area is greater than a first preset area but not greater than a second preset area, and the maximum lithium plating area is greater than a first preset area but not greater than a second preset area, then the degree of lithium plating of the bubble-like lithium in the captured image can be determined to be at the second level. If the total number of lithium deposits is greater than a second preset number, the total lithium plating area is greater than a second preset area, and the maximum lithium plating area is greater than a second preset area, then the degree of lithium plating of the bubble-like lithium in the captured image can be determined to be at the third level.

[0144] In this embodiment, the detection device determines the lithium plating area of ​​each lithium plating region, and determines the total lithium plating area based on the lithium plating area of ​​each lithium plating region corresponding to the same lithium plating type. Based on the total number of lithium plating regions corresponding to the same lithium plating type, the total lithium plating area, and the maximum lithium plating area among the lithium plating areas corresponding to the same lithium plating type, the lithium plating level of the anode electrode region corresponding to the captured image is determined. This allows the severity of lithium plating in the anode electrode region corresponding to the captured image to be known, so as to trace the battery cell based on the severity of lithium plating and improve the performance of the battery cell.

[0145] In one embodiment, the detection device is used to stitch together the images of the anode plates acquired at each workstation to obtain a stitched image. Based on the quotient obtained by dividing the position coordinates of the image with lithium plating in the stitched image by the total length of the anode plate, the number of turns of the image with lithium plating in the cell is determined.

[0146] If the quotient is an integer, it is determined to be the number of winding turns. If the quotient is not an integer, it is rounded up to obtain the integer result, which is determined to be the number of winding turns. Alternatively, if the quotient is not an integer, it is rounded down to obtain the integer result, which is determined to be the number of winding turns. Alternatively, if the quotient is not an integer, it is rounded down to obtain a first rounding result, and then rounded up to obtain a second rounding result, which are determined to be the number of winding turns.

[0147] In this embodiment, the detection device stitches together the images of the anode plates acquired at each workstation to obtain a stitched image. Based on the quotient obtained by dividing the position coordinates of the image with the lithium plating region in the stitched image by the total length of the anode plate, the number of winding turns of the image with the lithium plating region in the cell is determined, which facilitates the rapid tracing of the position of the lithium plating region in the stitched image based on the number of winding turns.

[0148] It can save all captured images of the target object, along with the corresponding test results, forming a complete quality traceability system. This provides data support for subsequent quality analysis, process improvement, and optimization of the test model. The test results can include the number of winding turns, the lithium plating level of the anode electrode area corresponding to the captured image, and the type of lithium plating in the lithium plating area. It can also store all captured images of the target object corresponding to the battery cell, along with the corresponding test results, in a file corresponding to the battery cell's identification code. The battery cell identification code can be obtained by scanning the identification code on the battery cell using a barcode scanner.

[0149] In one embodiment, such as Figure 7 As shown, Figure 7 This is a flowchart illustrating a detection method provided in an embodiment of this application. The detection method is applied to a detection device in a detection system and includes the following steps:

[0150] S701 receives a captured image of the target object sent by the imaging device in the detection system; the captured image is an image obtained by the imaging device capturing the target object at the current workstation, and the target object includes the anode plate obtained after disassembling the battery cell.

[0151] S702, Based on the captured image, determine the type of lithium deposition in the lithium deposition area on the anode electrode; the lithium deposition type includes at least one of strip-shaped lithium deposition, linear lithium deposition, bubble-shaped lithium deposition, and dot-shaped lithium deposition;

[0152] S703, when the imaging device completes imaging at the current station, it sends an imaging completion signal to the controller in the detection system; the imaging completion signal is used to instruct the controller to send a control command to the drive device in the detection system, and the control command is used to instruct the drive device to drive the imaging device to move a preset distance along the first direction of the anode sheet to the next station after the current station, and to take an image of the anode sheet at the next station to obtain the next image.

[0153] S704 receives the next captured image sent by the shooting device.

[0154] In one embodiment, S702, determining the type of lithium plating in the lithium plating region on the anode electrode based on the captured image can be achieved in the following way:

[0155] Based on the captured images and detection model of the anode electrode, the type of lithium plating on the anode electrode is determined.

[0156] In one embodiment, the detection method further includes:

[0157] Image samples of anode electrode samples obtained after disassembling battery cell samples, and actual lithium plating type samples corresponding to the image samples; based on the image samples and actual lithium plating type samples, an initial detection model is trained to obtain a detection model; the actual lithium plating type samples include at least one of strip-shaped lithium plating samples, linear lithium plating samples, bubble-shaped lithium plating samples, and dot-shaped lithium plating samples.

[0158] In one embodiment, determining the lithium plating type of the lithium plating region on the anode electrode based on the captured image in S702 above can be achieved in the following way:

[0159] The target image is obtained by preprocessing the captured image of the anode electrode; the lithium plating region in the target image is determined; if the lithium plating region meets the preset conditions corresponding to the preset lithium plating type, the lithium plating type of the lithium plating region is determined to be the preset lithium plating type.

[0160] The captured image can be preprocessed by at least one of the following: noise reduction, grayscale conversion, and grayscale enhancement, to obtain the target image.

[0161] For example, Gaussian filtering can be used to denoise the captured image to obtain a denoised image, the denoised image can be converted to grayscale to obtain a grayscale image, the grayscale image can be enhanced to obtain an enhanced image, and the enhanced image can be determined as the target image.

[0162] The Canny edge detection method or the Otsu threshold segmentation method can be used to identify the lithium plating region in the target image. If the lithium plating region meets the preset conditions corresponding to the preset lithium plating type, the lithium plating type of the lithium plating region is determined to be the preset lithium plating type.

[0163] In one embodiment, the detection method further includes:

[0164] Determine the lithium plating area of ​​each lithium plating region, and determine the total lithium plating area based on the lithium plating area of ​​each lithium plating region corresponding to the same lithium plating type; determine the lithium plating grade of the anode electrode based on the total number of lithium plating regions corresponding to the same lithium plating type, the total lithium plating area, and the maximum lithium plating area among the lithium plating areas corresponding to the same lithium plating type.

[0165] In one embodiment, the method may further include the following steps:

[0166] Images of the anode plates acquired at each workstation are stitched together to obtain a stitched image. The number of turns of the image with lithium plating in the cell is determined by dividing the position coordinates of the image with lithium plating in the stitched image by the total length of the anode plate.

[0167] In one embodiment, the quotient obtained by dividing the position coordinates of the captured image with lithium plating in the stitched image by the total length of the anode electrode sheet, and determining the number of turns of the captured image with lithium plating in the cell, can be achieved in the following way:

[0168] If the quotient is an integer, the quotient is determined to be the number of winding turns; if the quotient is not an integer, the quotient is rounded up to obtain the integer result, which is then determined to be the number of winding turns.

[0169] In one embodiment, a detection method is also provided, the method comprising the following steps:

[0170] The testing equipment receives a reset completion signal from the imaging device; the barcode scanner scans the identification code on the battery cell to obtain the battery cell identification code and sends it to the testing equipment; the PLC confirms that the target object has reached the designated shooting position, the zoom lens automatically zooms, and once automatic zooming is complete, the PLC controls the imaging device to take a picture of the target object at the current station to obtain an image, which is then sent to the testing equipment. The testing equipment, based on the captured image of the anode electrode, determines the lithium plating type of the lithium-plated area on the anode electrode and stores the captured image of the target object and the lithium plating type of the lithium-plated area on the anode electrode in the file corresponding to the battery cell identification code.

[0171] When the anode sheet is the target object, after the imaging device completes its imaging at the current station, it can send the captured image to the inspection equipment. The inspection equipment, based on the received image, determines that the imaging device has completed its imaging and sends an imaging completion signal to the controller. The controller, based on the imaging completion signal, confirms that the imaging device has completed its imaging at the current station. Upon confirmation that the imaging device has completed its imaging at the current station, the controller sends a control command to the drive device. Responding to the control command, the drive device moves the imaging device a preset distance along the first direction of the anode sheet to the next station. At the next station, the imaging device captures an image of the anode sheet to obtain the next captured image.

[0172] While the imaging device is capturing images at the current workstation, the detection equipment can inspect the images captured at the previous workstation to determine the type of lithium plating in the lithium plating areas of the previous image. This allows for simultaneous imaging and detection, thereby improving detection efficiency.

[0173] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0174] Based on the same inventive concept, this application also provides a detection apparatus for implementing the detection method described above. The solution provided by this apparatus is similar to the implementation scheme described in the above method; therefore, the specific limitations in one or more detection apparatus embodiments provided below can be found in the limitations of the detection method described above, and will not be repeated here.

[0175] In one embodiment, such as Figure 8 As shown, Figure 8 This is a schematic diagram of a detection device provided in an embodiment of this application. The detection device 800 is disposed in the detection equipment of the detection system, and the detection device 800 includes:

[0176] The receiving module 801 is used to receive the captured image of the target object sent by the imaging device in the detection system; the captured image is the image obtained by the imaging device at the current station of the target object, and the target object includes the anode plate obtained after the battery cell is disassembled;

[0177] The first determining module 802 is used to determine the lithium deposition type of the lithium deposition region on the anode electrode based on the captured image; the lithium deposition type includes at least one of strip-shaped lithium deposition, linear lithium deposition, bubble-shaped lithium deposition, and dot-shaped lithium deposition;

[0178] The sending module 803 is used to send a shooting completion signal to the controller in the detection system when the shooting device finishes shooting at the current station. The shooting completion signal is used to instruct the controller to send a control command to the drive device in the detection system. The control command is used to instruct the drive device to drive the shooting device to move a preset distance along the first direction of the anode sheet and then to the next station of the current station, so as to shoot the anode sheet at the next station to obtain the next image.

[0179] The receiving module 801 is also used to receive the next captured image sent by the shooting device.

[0180] In one embodiment, the first determining module 802 is specifically used to determine the type of lithium plating on the anode electrode based on the captured image and detection model of the anode electrode.

[0181] In one embodiment, the detection device 800 may further include:

[0182] The acquisition module is used to acquire image samples of anode electrode samples obtained after disassembling the battery cell samples, as well as the actual lithium plating type samples corresponding to the image samples;

[0183] The training module is used to train an initial detection model based on image samples and actual lithium plating type samples to obtain a detection model; the actual lithium plating type samples include at least one of strip-shaped lithium plating samples, linear lithium plating samples, bubble-shaped lithium plating samples, and dot-shaped lithium plating samples.

[0184] In one embodiment, the first determining module 802 specifically preprocesses the captured image of the anode electrode to obtain a target image; determines the lithium plating region in the target image; and determines the lithium plating type of the lithium plating region as the preset lithium plating type if the lithium plating region meets the preset conditions corresponding to the preset lithium plating type.

[0185] In one embodiment, the detection device 800 may further include:

[0186] The second determining module is used to determine the lithium plating area of ​​each lithium plating region, determine the total lithium plating area based on the lithium plating area of ​​each lithium plating region corresponding to the same lithium plating type, and determine the lithium plating grade of the anode electrode based on the total number of lithium plating regions corresponding to the same lithium plating type, the total lithium plating area, and the maximum lithium plating area among the lithium plating areas corresponding to the same lithium plating type.

[0187] In one embodiment, the detection device 800 may further include:

[0188] The stitching module is used to stitch together the images of the anode plates captured at each workstation to obtain a stitched image.

[0189] The third determining module is used to determine the number of turns of the image with lithium plating in the cell based on the quotient obtained by dividing the position coordinates of the image with lithium plating in the stitched image by the total length of the anode electrode.

[0190] In one embodiment, the third determining module is specifically used to determine the quotient as the number of winding turns when the quotient is an integer; and to round up the quotient to obtain the rounded result when the quotient is not an integer, and to determine the rounded result as the number of winding turns.

[0191] Each module in the aforementioned detection device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the operations corresponding to each module.

[0192] In one embodiment, a detection device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 9 As shown, the testing device includes a processor, memory, communication interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides the environment for the operation of the operating system and computer programs in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a testing method. The display screen can be an LCD screen or an e-ink display screen. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad on the device's casing, or an external keyboard, touchpad, or mouse.

[0193] Those skilled in the art will understand that Figure 9 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the testing equipment to which the present application is applied. Specific testing equipment may include more or fewer components than those shown in the figure, or may combine certain components, or may have different component arrangements.

[0194] In one embodiment, a detection device is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps of any of the above method embodiments. The technical principles and effects are similar and will not be repeated here.

[0195] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps of any of the above method embodiments. The technical principles and effects are similar and will not be repeated here.

[0196] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of any of the above method embodiments. The technical principles and effects are similar and will not be repeated here.

[0197] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0198] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0199] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0200] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A detection system, characterized in that, The detection system includes: A photographing device is used to photograph a target object at the current workstation to obtain a photographed image, and to send the photographed image to a detection device; the target object includes the anode plate obtained after disassembling a battery cell; The detection device is used to determine the lithium plating type of the lithium plating region on the anode electrode based on the captured image; the lithium plating type includes at least one of strip-shaped lithium plating, linear lithium plating, bubble-shaped lithium plating, and dot-shaped lithium plating. The detection system also includes: The controller is used to send control commands to the drive device when the shooting device completes shooting at the current workstation; The driving device is used to respond to the control command and drive the imaging device to move a preset distance along the first direction of the anode plate to the next working position; the length of the anode plate in the first direction is greater than the length of the anode plate in the second direction. The imaging device is also used to capture the anode sheet at the next working position to obtain the next captured image; The detection equipment is used to stitch together the images of the anode sheet acquired at each work station to obtain a stitched image. Based on the quotient obtained by dividing the position coordinates of the image with lithium plating in the stitched image by the total length of the anode sheet, the number of turns of the image with lithium plating in the cell is determined. The detection device is used to determine the lithium plating area of ​​each of the lithium plating regions, and to determine the total lithium plating area based on the lithium plating area of ​​each lithium plating region corresponding to the same lithium plating type; and to determine the lithium plating level of the anode electrode region corresponding to the captured image based on the total number of lithium plating regions corresponding to the same lithium plating type, the total lithium plating area, and the maximum lithium plating area among the lithium plating areas corresponding to the same lithium plating type.

2. The detection system according to claim 1, characterized in that, The detection system further includes a frame, and the driving device includes: The transmission mechanism includes a first mating component and a second mating component that engage in meshing transmission. The first mating component is mounted on the frame and extends along the first direction. A driving component is slidably fitted to the frame along the first direction. The shooting device is mounted on the driving component. The driving component is connected to the second fitting component and is used to drive the second fitting component to rotate, so that the driving component and the second fitting component move along the first direction.

3. The detection system according to claim 2, characterized in that, The imaging device includes: A light source assembly, connected to the driving component, is used to provide illumination for the shooting environment in which the shooting device is located; A camera assembly connected to the drive unit for taking pictures of the target object when the light source assembly provides illumination; the target object also includes at least one of the surfaces of the battery cell, the surfaces of the bare battery cell obtained after peeling off the outer casing of the battery cell, and the cathode electrode and the separator obtained after disassembling the battery cell.

4. The detection system according to claim 3, characterized in that, The camera assembly includes: A ranging sensor, connected to the zoom lens of the camera assembly, is used to measure the distance between the zoom lens and the target object; The zoom lens is used to adjust the focusing position of the zoom lens on the target object according to the distance; An indicator light is used to form a light spot on the target object; the light spot is used to indicate the focus position of the zoom lens.

5. The detection system according to claim 3 or 4, characterized in that, The light source assembly includes: An outer cover, which is connected to the drive unit, forms a cavity for accommodating the light source body; The light source body is connected to the light source controller located outside the cavity via a cable assembly that passes through a through hole provided on the outer cover. The cable assembly includes a cable and a cable entry assembly, the cable entry assembly being used to clamp the cable and seal the gap at the through hole.

6. The detection system according to any one of claims 1-4, characterized in that, The detection equipment is used to determine the type of lithium plating on the anode electrode based on the captured images and detection models.

7. The detection system according to claim 6, characterized in that, The detection device is used to acquire image samples of anode electrode samples obtained after disassembling the battery cell sample, and actual lithium plating type samples corresponding to the image samples. Based on the image samples and the actual lithium plating type samples, an initial detection model is trained to obtain the detection model. The actual lithium plating type samples include at least one of strip-shaped lithium plating samples, linear lithium plating samples, bubble-shaped lithium plating samples, and dot-shaped lithium plating samples.

8. The detection system according to claim 7, characterized in that, The detection device is used to input the image sample into the initial detection model, obtain the predicted lithium plating type output by the initial detection model, determine the difference between the predicted lithium plating type and the actual lithium plating type sample, and train the initial detection model based on the difference to obtain the detection model.

9. A detection method, characterized in that, The detection method is applied to the detection equipment in the detection system, and the detection method includes: Receive the captured image of the target object sent by the imaging device in the detection system; the captured image is the image obtained by the imaging device at the current workstation of the target object, and the target object includes the anode plate obtained after disassembling the battery cell; Based on the captured images, the lithium plating type of the lithium plating region on the anode electrode is determined; the lithium plating type includes at least one of strip-shaped lithium plating, linear lithium plating, bubble-shaped lithium plating, and dot-shaped lithium plating. The method further includes: When the imaging device completes imaging at the current workstation, it sends an imaging completion signal to the controller in the detection system. The imaging completion signal is used to instruct the controller to send a control command to the drive device in the detection system. The control command is used to instruct the drive device to control the imaging device to move a preset distance along the first direction of the anode sheet and then reach the next workstation of the current workstation, where the anode sheet is imaged at the next workstation to obtain the next image. Receive the next captured image sent by the capturing device; The images of the anode sheet acquired at each workstation are stitched together to obtain a stitched image; the number of turns of the image with the lithium plating region in the battery cell is determined by dividing the position coordinates of the image with the lithium plating region in the stitched image by the total length of the anode sheet. Determine the lithium plating area of ​​each lithium plating region, and determine the total lithium plating area based on the lithium plating area of ​​each lithium plating region corresponding to the same lithium plating type; The lithium plating grade of the anode electrode is determined based on the total number of lithium plating regions corresponding to the same lithium plating type, the total lithium plating area, and the largest lithium plating area among the lithium plating areas corresponding to the same lithium plating type.

10. The detection method according to claim 9, characterized in that, Determining the lithium plating type in the lithium plating region on the anode electrode based on the captured image includes: Based on the captured images and detection model of the anode electrode, the type of lithium plating on the anode electrode is determined.

11. The detection method according to claim 10, characterized in that, The detection method further includes: Obtain image samples of anode electrode samples obtained after disassembling battery cell samples, and the actual lithium plating type samples corresponding to the image samples; Based on the image samples and the actual lithium plating type samples, an initial detection model is trained to obtain the detection model; the actual lithium plating type samples include at least one of strip-shaped lithium plating samples, linear lithium plating samples, bubble-shaped lithium plating samples, and dot-shaped lithium plating samples.

12. The detection method according to claim 9, characterized in that, Determining the lithium plating type in the lithium plating region on the anode electrode based on the captured image includes: The target image is obtained by preprocessing the captured image of the anode electrode. Identify the lithium plating region in the target image; If the lithium plating region meets the preset conditions corresponding to the preset lithium plating type, the lithium plating type of the lithium plating region is determined to be the preset lithium plating type.

13. The detection method according to claim 9, characterized in that, The determination of the number of turns of the image with lithium plating in the cell based on the quotient obtained by dividing the position coordinates of the image with lithium plating in the stitched image by the total length of the anode sheet includes: If the quotient is an integer, the quotient is determined to be the number of winding turns; If the quotient is not an integer, the quotient is rounded up to obtain the rounded result, and the rounded result is determined to be the number of winding turns.

14. A detection device, characterized in that, The detection device is installed in the detection equipment of the detection system, and the detection device includes: The receiving module is used to receive the captured image of the target object sent by the imaging device in the detection system; the captured image is the image obtained by the imaging device at the current workstation of the target object, and the target object includes the anode plate obtained after disassembling the battery cell; The first determining module is used to determine the lithium plating type of the lithium plating region on the anode electrode based on the captured image; the lithium plating type includes at least one of strip-shaped lithium plating, linear lithium plating, bubble-shaped lithium plating, and dot-shaped lithium plating. The sending module is used to send a shooting completion signal to the controller in the detection system when the shooting device completes shooting at the current station; the shooting completion signal is used to instruct the controller to send a control command to the drive device in the detection system, the control command is used to instruct the drive device to drive the shooting device to move a preset distance along the first direction of the anode sheet to the next station of the current station, and to shoot the anode sheet at the next station to obtain the next image. The receiving module is also used to receive the next captured image sent by the shooting device; The detection device further includes: The second determining module is used to determine the lithium plating area of ​​each lithium plating region, determine the total lithium plating area based on the lithium plating area of ​​each lithium plating region corresponding to the same lithium plating type, and determine the lithium plating grade of the anode electrode based on the total number of lithium plating regions corresponding to the same lithium plating type, the total lithium plating area, and the maximum lithium plating area among the lithium plating areas corresponding to the same lithium plating type. The stitching module is used to stitch together the images of the anode plates captured at each workstation to obtain a stitched image. The third determining module is used to determine the number of turns of the image with lithium plating in the cell based on the quotient obtained by dividing the position coordinates of the image with lithium plating in the stitched image by the total length of the anode electrode.

15. A detection device, comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 9 to 13.

16. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 9 to 13.

17. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 9 to 13.

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