Tab state detection system and method, electronic equipment and storage medium

Abstract

The invention discloses a tab state detection system and method, electronic equipment and a storage medium. The tab state detection system comprises a combined light source and an image acquisition device, the combined light source is used for emitting irradiation light to the side surface of a to-be-detected tab at a plurality of different angles, so that the to-be-detected tab reflects reflected light containing side surface feature information of the to-be-detected tab; and the image acquisition device is used for acquiring reflected light of the irradiation light corresponding to each angle on the side surface of the to-be-detected tab and generating an image. According to the system, the tab can be irradiated at multiple different angles through the combined light source, so that the poor imaging quality of the tab in a slightly uneven or reflective state is avoided, the characteristic information of the tab at more levels can be obtained, the multi-angle characteristics of the tab are more obvious, and the tab folding detection accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the field of power batteries, and in particular to a tab state detection system, a tab state detection method, an electronic device and a non-volatile readable storage medium. Background Art

[0002] In the related art, the tab status detection system takes images and performs detection through a combination of two cameras on the top and the front and a light source. This solution uses a strip light source and a ring light source to emit light to the side of the tab to be tested. When the tab is slightly uneven or reflective, the imaging quality is poor, the light source cannot illuminate from different angles, and a single light source cannot make all the features of the tab obvious, resulting in low accuracy in detecting tab folding. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a tab state detection system, which can illuminate the tab at multiple different angles by combining light sources to avoid poor imaging quality when the tab is slightly uneven or reflective, and can obtain more levels of characteristic information of the tab, making the multi-angle characteristics of the tab more obvious, and improving the accuracy of detecting the tab folding.

[0004] The second object of the present invention is to provide a method for detecting the state of a tab.

[0005] The third objective of the present invention is to provide an electronic device.

[0006] A fourth objective of the present invention is to provide a non-volatile readable storage medium.

[0007] In order to solve the above problems, an embodiment of the first aspect of the present invention provides a pole lug status detection system, comprising at least one detection subsystem, wherein the detection subsystem comprises: a combined light source, wherein the combined light source is used to emit irradiation light to the side of the pole lug to be measured at multiple different angles, so that the pole lug to be measured reflects reflected light containing side feature information of the pole lug to be measured; an image acquisition device, wherein the image acquisition device is used to acquire the reflected light of the side of the pole lug to be measured corresponding to each angle of the irradiation light and generate an image.

[0008] According to the tab state detection system of an embodiment of the present invention, a combined light source is used to emit illumination light at multiple different angles to the side of the tab to be tested, and an image acquisition device collects the reflected light of the side of the tab to be tested corresponding to each angle of the illumination light and generates an image, thereby avoiding poor imaging quality when the tab is slightly uneven or reflective, and obtaining more levels of characteristic information of the tab, making the multi-angle features of the tab more obvious, thereby improving the accuracy of detecting the folding of the tab.

[0009] In some embodiments, the combined light source includes: a plurality of annular light sources, the plurality of annular light sources are arranged along a target direction, the plurality of annular light sources are concentrically arranged, wherein the target direction is a direction perpendicular to the side surface of the electrode lug to be measured.

[0010] In some embodiments, the radius of the multiple annular light sources decreases from the annular light source close to the pole lug to be measured to the annular light source far from the pole lug to be measured.

[0011] In some embodiments, a plurality of annular light sources emit light in sequence according to a preset order to provide emitted light at a plurality of different angles to the side of the electrode tab to be tested.

[0012] In some embodiments, the combined light source further includes: a coaxial light source, which is located on a side of the plurality of annular light sources away from the electrode ear to be measured and is configured to work when each of the annular light sources works to perform light compensation.

[0013] In some embodiments, the detection subsystem also includes: an optical path direction conversion device, which is located on the side of the combined light source away from the pole ear to be measured, and the optical path direction conversion device is at a preset angle to the image acquisition device. The reflected light of the pole ear to be measured passes through the combined light source and is incident on the optical path direction conversion device, and the optical path direction conversion device is used to refract the reflected light of the pole ear to be measured to the image acquisition device.

[0014] In some embodiments, the light path direction conversion device includes a prism.

[0015] In some embodiments, the tab status detection system includes a first detection subsystem and a second detection subsystem; the combined light source of the first detection subsystem is used to emit light to the first side of the positive pole tab to be tested, and the combined light source of the second detection subsystem is used to emit light to the second side of the positive pole tab to be tested, and the first side of the positive pole tab to be tested is opposite to the second side of the positive pole tab to be tested.

[0016] In some embodiments, the tab status detection system also includes a third detection subsystem and a fourth detection subsystem; the combined light source of the third detection subsystem is used to emit light to the first side of the negative pole tab to be tested, and the combined light source of the fourth detection subsystem is used to emit light to the second side of the negative pole tab to be tested, and the first side of the negative pole tab to be tested is opposite to the second side of the negative pole tab to be tested.

[0017] In some embodiments, the tab status detection system also includes: a supporting structure, the first detection subsystem, the second detection subsystem, the third detection subsystem and the fourth detection subsystem are all arranged on the supporting structure, the combined light source in the first detection subsystem is arranged relative to the combined light source in the second detection subsystem, and the combined light source in the third detection subsystem is arranged relative to the combined light source in the fourth detection subsystem.

[0018] In some embodiments, the support structure includes: a support platform and a support frame, the support frame is installed on the support platform, the support frame includes four vertical support rods arranged relatively at intervals, the first detection subsystem, the second detection subsystem, the third detection subsystem and the fourth detection subsystem are respectively arranged on the four vertical support rods, wherein the image acquisition device of each detection subsystem is located above the corresponding combined light source.

[0019] In some embodiments, the tab status detection system further includes: a placement structure, including a placement table, wherein the placement table is used to place a target battery cell including the tab to be tested, and the placement table is located in the middle of the four vertical support rods.

[0020] In some embodiments, the tab status detection system further includes: a data processing device connected to the image acquisition device, and configured to detect the status of the tab to be detected based on the image acquired by the image acquisition device.

[0021] A second aspect of the present invention provides a method for detecting the state of a pole lug, comprising: obtaining a fused image of multiple pole lug side images, wherein the multiple pole lug side images are generated based on reflected light corresponding to multiple different angles of illumination of the side of the pole lug to be tested, and the reflected light contains side feature information of the pole lug to be tested; determining the pole lug state of the pole lug to be tested based on the fused image.

[0022] According to the method for detecting the state of the pole lug in an embodiment of the present invention, the image acquisition device obtains a fused image of multiple side images of the pole lug, determines the state of the pole lug to be tested by the fused image, obtains more levels of characteristic information of the pole lug, makes the multi-angle features of the pole lug more obvious, and accurately detects the number of pole lug layers and whether the state of the pole lugs of all layers are folded.

[0023] In some embodiments, determining the state of the lug to be tested according to the fused image includes: obtaining a lug middle sub-image and a lug head sub-image in the fused image, wherein the lug to be tested includes a lug head away from a battery cell body and a lug root connected to the battery cell body, and the lug to be tested also includes a lug middle portion located between the lug head and the lug root; when the lug middle sub-image and / or the lug head sub-image meet the lug folding calibration morphology, determining the folded image area in the lug middle sub-image and / or the lug head sub-image.

[0024] In some embodiments, the folded image area is determined by a tab fold detection model; the tab fold detection model takes the tab middle sub-image and / or the tab head sub-image as input and the folded image area as output, and the tab fold detection model is constructed based on the data of the tab fold calibration morphology.

[0025] In some embodiments, the tab state of the tab to be tested includes whether the tab to be tested is folded; the folding of the tab to be tested includes that the area of ​​the folded image region is greater than a folding area threshold.

[0026] In some embodiments, the state of the pole lug to be tested includes whether the number of structural layers of the pole lug to be tested is consistent with the standard number of layers of the pole lug to be tested; the number of structural layers of the pole lug to be tested is obtained based on the sub-image of the pole lug root; the sub-image of the pole lug root is obtained from the fused image.

[0027] In some embodiments, the number of structural layers of the pole lug to be tested is obtained through a pole lug structural layer number detection model; the pole lug structural layer number detection model uses the pole lug root sub-image as input and the structural parameters of the pole lug to be tested as output, and the pole lug structural layer number detection model is constructed based on the pole lug calibration morphological data.

[0028] In some embodiments, the number of structural layers of the pole lug to be tested is the sum of the number of layers of all layer structural contours of the pole lug to be tested; the number of layers included in each layer structural contour is obtained by extracting the contour of the pole lug single-layer structure in the pole lug root sub-image by the pole lug structural layer number detection model and analyzing the structural contour of each layer.

[0029] In some embodiments, when the obtained structural profile includes a plurality of layers, the number of layers of the structural profile takes the maximum value among the plurality of layers.

[0030] In some embodiments, before obtaining the number of structural layers of the pole lug to be tested according to the pole lug root sub-image, the pole lug state detection method further includes: preprocessing the pole lug root sub-image through edge tracking and region growing algorithms to enhance edge features of each layer of the pole lug structure.

[0031] In some embodiments, the tab status detection method further includes: prompting the tab status of the tab to be detected.

[0032] A third aspect of the present invention provides an electronic device, comprising: at least one processor; a memory communicatively connected to the at least one processor; the memory storing a computer program executable by the at least one processor, wherein the at least one processor implements the lug status detection method described in the above embodiment when executing the computer program.

[0033] According to the electronic device of the embodiment of the present invention, the corresponding tab state detection program can be stored in the memory. When the tab state detection method is implemented, the processor runs the program in the memory, and the image acquisition device obtains a fused image of multiple tab side images, determines the tab state of the tab to be tested based on the fused image, and accurately detects the number of tab layers and whether the tab states of all layers are folded.

[0034] A fourth aspect of the present invention provides a non-volatile readable storage medium having a computer program stored thereon, wherein the computer program, when executed, implements the tab status detection method described in the above embodiment.

[0035] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a front view schematic diagram of a tab state detection system according to an embodiment of the present invention; Figure 2 is a front view schematic diagram of a structure of a tab state detection system according to an embodiment of the present invention; Figure 3 is a schematic top view of a tab state detection system according to an embodiment of the present invention; Figure 4 is a schematic top view of a structure of a tab state detection system according to an embodiment of the present invention; Figure 5 is a structural block diagram of a tab state detection system according to an embodiment of the present invention; Figure 6 is a schematic diagram of the installation of a tab state detection system according to an embodiment of the present invention; Figure 7 is a flow chart of a tab state detection method according to an embodiment of the present invention; Figure 8 is a flow chart of a tab folding detection algorithm according to an embodiment of the present invention; Fig. 9 is a flow chart of a tab layer number detection algorithm according to one embodiment of the present invention; Fig.10 is a schematic diagram of a tab state detection process according to an embodiment of the present invention; Fig.11 is a flow chart of tab detection according to one embodiment of the present invention; Fig.12 is a structural block diagram of an electronic device according to an embodiment of the present invention.

[0037] Reference numerals: Electronic device 300; Tab status detection system 200; Processor 301; memory 302; detection subsystem 100; first detection subsystem 101; second detection subsystem 102; third detection subsystem 103; fourth detection subsystem 104; Combined light source 110; image acquisition device 120; annular light source 111; coaxial light source 112; light path direction conversion device 130; prism 131; support structure 140; support table 141; support frame 142; placement structure 150; placement table 151; data processing device 160. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0039] In the prior art, the tab status detection system takes images and performs detection through a combination of two cameras and a light source on the top and the front. The image quality of the strip light source and the ring light source used is poor when the tab is slightly uneven and reflective, and a single light source cannot make all the features of the tab obvious, thus affecting visual detection.

[0040] In order to solve the above problems, an embodiment of the first aspect of the present invention provides a pole ear state detection system, which can illuminate the pole ear at multiple different angles by combining light sources to avoid poor imaging quality when the pole ear is slightly uneven or reflective, and can obtain more levels of characteristic information of the pole ear, making the multi-angle characteristics of the pole ear more obvious, thereby improving the accuracy of detecting the folding of the pole ear.

[0041] like Figure 1 As shown, the tab status detection system 200 according to the embodiment of the present invention includes: at least one detection subsystem 100 .

[0042] Among them, the detection subsystem 100 includes: a combined light source 110 and an image acquisition device 120; the combined light source 110 is used to emit irradiation light to the side of the pole ear to be tested at multiple different angles, so that the pole ear to be tested reflects reflected light containing side feature information of the pole ear to be tested; the image acquisition device is used to collect the reflected light of the side of the pole ear to be tested corresponding to each angle of the irradiation light and generate an image.

[0043] Specifically, the combined light source 110 can be composed of a plurality of light source units, which emit light at different angles and intensities, and illuminate the pole ear to be tested from multiple directions, ensuring that no matter how concave, convex or tilted the surface of the pole ear is, light can be directly irradiated and reflected, which helps to capture more details and avoid shadows and blind spots; after the combined light source 110 emits irradiation light at multiple different angles to the side of the pole ear to be tested, the pole ear to be tested reflects the reflected light containing the side feature information of the pole ear to be tested to the image acquisition device 120, and the image acquisition device 120 obtains the reflected light of the side of the pole ear to be tested corresponding to the irradiation light at each angle, and generates an image according to the reflected light from the side of the pole ear to be tested. The image acquisition device 120 includes an industrial camera and a telecentric lens, which are used in combination to achieve high-precision and high-stability image capture and processing.

[0044] According to the tab state detection system of an embodiment of the present invention, a combined light source is used to emit illumination light at multiple different angles to the side of the tab to be tested, and an image acquisition device collects the reflected light of the side of the tab to be tested corresponding to each angle of the illumination light and generates an image, thereby avoiding poor imaging quality when the tab is slightly uneven or reflective, and obtaining more levels of characteristic information of the tab, making the multi-angle features of the tab more obvious, thereby improving the accuracy of detecting the folding of the tab.

[0045] In some embodiments, Figure 2 As shown, the combined light source 110 includes: a plurality of annular light sources 111 .

[0046] The plurality of annular light sources 111 are arranged along a target direction, the plurality of annular light sources 111 are concentrically arranged, and the target direction is a direction perpendicular to the side surface of the electrode lug to be measured.

[0047] Specifically, Figure 2 As shown, multiple annular light sources 111 are arranged along the target direction, and the target direction is perpendicular to the direction of the side of the pole ear to be measured, ensuring that the light of the annular light source 111 can irradiate the pole ear to be measured; multiple annular light sources 111 are arranged along the target direction and concentrically arranged, which can ensure that the side of the pole ear to be measured is evenly and efficiently illuminated from multiple different angles, thereby minimizing the interference caused by shadows and reflections, and improving image quality and the accuracy of feature extraction.

[0048] In some embodiments, the radius of the multiple annular light sources decreases from the annular light source close to the pole lug to be measured to the annular light source far from the pole lug to be measured.

[0049] Specifically, Figure 2 The multiple annular light sources 111 shown are arranged along the target direction and are concentrically arranged, with the radius gradually decreasing from the annular light source 111 close to the pole ear to be measured to the annular light source 111 far from the pole ear to be measured; the annular light source 111 close to the pole ear to be measured has a larger radius, which can make the light more concentrated, thereby enhancing the lighting effect on the details of the side of the pole ear. Since the light source is reasonably distributed, the light is irradiated to the side of the pole ear from different angles, which helps to reduce the shadow area, avoid the strong reflection interference that may be caused by a single light source, and improve the image quality. By combining the annular light sources 111 to illuminate the side of the pole ear from different angles, the defects, scratches, deformation and other problems of the pole ear can be accurately detected.

[0050] In some embodiments, a plurality of annular light sources emit light in sequence according to a preset order to provide emitted light at a plurality of different angles to the side of the tab to be tested.

[0051] Specifically, Figure 2 The multiple annular light sources 111 shown emit light in sequence according to a preset order. The multiple annular light sources 111 are concentrically arranged around the pole ear to be measured. Each annular light source 111 has a different radius, so as to generate emitted light at different angles. The multiple annular light sources 111 emit light to the side of the pole ear to be measured in sequence according to a preset order. The multiple annular light sources 111 emit light individually or in combination to provide a unique illumination angle for the side of the pole ear to be measured.

[0052] In some embodiments, Figure 2 As shown, the combined light source 110 further includes a coaxial light source 112 .

[0053] The coaxial light source 112 is located on a side of the plurality of annular light sources 111 away from the electrode ear to be measured, and is used to work when each annular light source 111 works to perform light compensation.

[0054] Specifically, multiple annular light sources 111 emit light in sequence according to a preset order, providing multiple emitted light angles to the side of the pole ear to be tested. At the same time, a coaxial light source 112 is introduced, so that the coaxial light source 112 can remain in a working state to perform light compensation when each annular light source 111 is working, adjust or balance the light distribution of the entire combined light source 110, so as to reduce problems such as shadows and uneven lighting, and eliminate the influence of the reflection on the pole ear surface on the image effect through the combined light source 110.

[0055] In some embodiments, Figure 1 As shown, the detection subsystem 100 further includes: an optical path direction conversion device 130 .

[0056] Among them, the optical path direction conversion device 130 is located on the side of the combined light source 110 away from the pole ear to be measured, and the optical path direction conversion device 130 and the image acquisition device 120 are at a preset angle. The reflected light of the pole ear to be measured passes through the combined light source 110 and is incident on the optical path direction conversion device 120. The optical path direction conversion device 130 is used to refract the reflected light of the pole ear to be measured to the image acquisition device 120.

[0057] Specifically, Figure 1 As shown, the direction conversion device 130 is located on the side of the combined light source 110 away from the pole ear to be measured, and the light path direction conversion device 130 and the image acquisition device 120 are at a preset angle. The light path is changed by the light path direction conversion device 130 to greatly save installation space, so that the reflected light of the pole ear to be measured is incident on the light path direction conversion device 130, and the light path direction conversion device 130 refracts the reflected light of the pole ear to be measured to the image acquisition device 120. While transmitting the reflected light of the pole ear to be measured to the image acquisition device 120, the installation space is saved, and the detection of the pole ear status is convenient.

[0058] In some embodiments, Figure 2 As shown, the optical path direction conversion device 130 includes: a prism 131 .

[0059] Specifically, the prism 131 is usually made of transparent material and is a polyhedral structure. Its side is the plane where the light is incident and emitted, and the plane perpendicular to the side is called the main section. According to the shape of the main section, prisms can be divided into various types such as triangular prisms, right-angle prisms, and pentagonal prisms; the present invention selects a triangular prism to reflect light, and the main section of the triangular prism is a triangle, with two refractive surfaces, the angle between them is called the vertex angle, and the plane opposite to the vertex angle is the bottom surface. When the reflected light of the pole ear to be measured is incident on the prism 131, the prism 131 deflects the reflected light by 90 degrees, so that the reflected light of the pole ear to be measured passes through the combined light source 110 and is incident on the optical path direction conversion device 130. The optical path direction conversion device 130 refracts the reflected light of the pole ear to be measured to the image acquisition device 120, saving installation space.

[0060] In some embodiments, Figure 3 As shown, the tab state detection system 200 includes: a first detection subsystem 101 and a second detection subsystem 102 .

[0061] Among them, the combined light source of the first detection subsystem 101 is used to emit light to the first side of the positive electrode ear to be tested, and the combined light source of the second detection subsystem 102 is used to emit light to the second side of the positive electrode ear to be tested, and the first side of the positive electrode ear to be tested is opposite to the second side of the positive electrode ear to be tested.

[0062] Specifically, the first detection subsystem 101 and the second detection subsystem 102 are arranged at the positive electrode of the tab, and the first detection subsystem 101 and the second detection subsystem 102 are respectively located on both sides of the positive tab, that is, the first side and the second side of the positive tab, and the first side of the positive tab to be tested is opposite to the second side, and the first detection subsystem 101 and the second detection subsystem 102 can obtain image information on both sides of the positive tab.

[0063] In some embodiments, Figure 3 As shown, the tab status detection system 200 includes: a third detection subsystem 103 and a fourth detection subsystem 104 .

[0064] Among them, the combined light source of the third detection subsystem 103 is used to emit light to the first side of the negative electrode ear to be tested, and the combined light source of the fourth detection subsystem 104 is used to emit light to the second side of the negative electrode ear to be tested, and the first side of the negative electrode ear to be tested is opposite to the second side of the negative electrode ear to be tested.

[0065] Specifically, the third detection subsystem 103 and the fourth detection subsystem 104 are arranged at the negative pole of the tab, and the third detection subsystem 103 and the fourth detection subsystem 104 are respectively located on both sides of the negative pole tab, that is, the first side and the second side of the negative pole tab, and the first side of the negative pole tab to be tested is opposite to the second side, and the third detection subsystem 103 and the fourth detection subsystem 104 can obtain image information on both sides of the negative pole tab; the first detection subsystem 101, the second detection subsystem 102, the third detection subsystem 103 and the fourth detection subsystem 104 work simultaneously to obtain image information on both sides of the positive and negative pole tabs of the target battery cell.

[0066] In some embodiments, Figure 4 As shown, the tab status detection system 200 includes: a support structure 140 .

[0067] Among them, the first detection subsystem 101, the second detection subsystem 102, the third detection subsystem 103 and the fourth detection subsystem 104 are all arranged on the supporting structure 140, the combined light source in the first detection subsystem 101 is arranged relative to the combined light source in the second detection subsystem 102, and the combined light source in the third detection subsystem 103 and the combined light source in the fourth detection subsystem 104 are arranged relative to each other.

[0068] Specifically, the first detection subsystem 101 and the second detection subsystem 102 are relatively arranged on both sides of the positive electrode tab to be tested. Therefore, the combined light source in the first detection subsystem 101 is relatively arranged with the combined light source in the second detection subsystem 102, emitting light at different angles and intensities, and irradiating the two sides of the positive electrode tab to be tested from multiple directions; the third detection subsystem 103 and the fourth detection subsystem 104 are relatively arranged on both sides of the negative electrode tab to be tested. Therefore, the combined light source in the third detection subsystem 103 and the combined light source in the fourth detection subsystem 10104 are relatively arranged, emitting light at different angles and intensities, and irradiating the two sides of the negative electrode tab to be tested from multiple directions.

[0069] The existing tab status detection system takes images through a combination of two cameras and a light source, one on the top and one on the front. This makes the mechanical structure design more complicated and requires more profiles for fixation.

[0070] In order to solve the above problems, in some embodiments of the present application, Figure 2 As shown, the tab state detection system 200 adopts a support structure 140 and a placement structure 150 to simplify the mechanical structure design. The support structure 140 includes: a support table 141 and a support frame 142.

[0071] Specifically, the support frame 142 is installed on the support platform 141, and the support frame 142 includes four vertical support rods arranged relatively at intervals. The first detection subsystem 101, the second detection subsystem 102, the third detection subsystem 103 and the fourth detection subsystem 104 are respectively arranged on the four vertical support rods, wherein the image acquisition device of each detection subsystem 100 is located above the corresponding combined light source, saving installation space.

[0072] In some embodiments, Figure 2 As shown, the tab status detection system 200 includes: a placement architecture 150 .

[0073] Specifically, the placement structure 150 includes a placement platform 151, which is used to place the target battery cell including the tab to be tested. The placement platform 151 is located in the middle of four vertical support rods. Figure 4 As shown, the target battery cell is placed on the placement platform 151 in the middle of four vertical support rods.

[0074] For example, Figure 2 and Figure 4It is a top view and a front view of the structure 200 of the tab state detection system of the invention. The installation space is greatly saved by changing the optical path by using the prism 131, and the influence of the reflection on the surface of the metal tab on the image effect is eliminated by the combined light source 110. Among them, the tab state detection system structure 200 includes: the battery cell to be detected, the image acquisition device 120, and the image acquisition device 120 includes an industrial camera and a telecentric lens, a combined light source 110, and a prism 131.

[0075] In some embodiments, Figure 5 As shown, the tab status detection system 200 includes: a data processing device 160 .

[0076] The data processing device 160 is connected to the image acquisition device 120 and is used to detect the state of the tab to be tested according to the image acquired by the image acquisition device 120 .

[0077] Specifically, after the combined light source 110 emits irradiation light to the side of the pole ear to be tested at multiple different angles, the pole ear to be tested reflects reflected light containing side feature information of the pole ear to be tested to the image acquisition device 120. The image acquisition device 120 obtains the reflected light of the side of the pole ear to be tested corresponding to each angle of the irradiation light, generates an image based on the reflected light from the side of the pole ear to be tested, and sends the generated image to the data processing device 160. The processing device 160 detects the state of the pole ear to be tested based on the received image.

[0078] For example, see Figure 6 The hardware structure of the tab state detection system 200 is described, wherein the installation dimensions of the positive and negative tabs are consistent. Taking the negative tab as an example, the distance from the combined light source 110 to the pole core is 70±10mm, the light source thickness of the combined light source 110 is 164.1mm, the prism thickness is 100mm, and the working distance from the combined light source 110 to the image acquisition device 120 is 280±20mm.

[0079] With the vigorous development of new energy, power batteries have become an important part of the development of new energy. At present, most battery production processes connect the stacked tabs by ultrasonic welding. If the tabs are folded before welding, it will not only make the battery scrapped and increase production costs, but also there is a risk of the tabs touching the shell, causing the battery to short-circuit and catch fire. The existing technology does not accurately detect whether the tabs of all layers are folded, resulting in low yields in the production process.

[0080] In order to solve the above problems, the second embodiment of the present invention provides a method for detecting the state of a tab. Figure 7 A method for detecting a tab state according to an embodiment of the second aspect of the present invention is described as follows: Figure 7 As shown, the method at least includes step S1 to step S2.

[0081] Step S1, obtaining a fused image of multiple side images of the tab, wherein the multiple side images of the tab are generated based on the reflected light of the side of the tab to be measured corresponding to the light irradiated at multiple different angles, and the reflected light contains the side feature information of the tab to be measured.

[0082] Specifically, when detecting the state of the pole lug, after the combined light source in the pole lug state detection system emits irradiation light to the side of the pole lug to be tested at multiple different angles, the pole lug to be tested reflects reflected light containing side feature information of the pole lug to be tested to the image acquisition device, the image acquisition device obtains the reflected light of the side of the pole lug to be tested corresponding to each angle of the irradiation light, generates an image based on the reflected light from the side of the pole lug to be tested, the image acquisition device sends the generated image to the data processing device, and the data processing device analyzes and fuses the received images to obtain a fused image of multiple pole lug side images.

[0083] Step S2, determining the tab state of the tab to be tested according to the fused image.

[0084] Specifically, after the data processing device in the tab state detection system analyzes and fuses the received images to obtain a fused image of multiple tab side images, it determines the tab state of the tab to be tested based on the fused image to judge whether the tab is folded.

[0085] According to the method for detecting the state of the pole lug in an embodiment of the present invention, the image acquisition device obtains a fused image of multiple side images of the pole lug, determines the state of the pole lug to be tested by the fused image, obtains more levels of characteristic information of the pole lug, makes the multi-angle characteristics of the pole lug more obvious, and accurately detects the number of pole lug layers and whether the state of the pole lugs of all layers are folded.

[0086] In some embodiments, determining the state of a lug to be tested based on a fused image includes: obtaining a lug middle sub-image and a lug head sub-image in the fused image, wherein the lug to be tested includes a lug head away from a battery cell body and a lug root connected to the battery cell body, and the lug to be tested also includes a lug middle portion located between the lug head and the lug root; when the lug middle sub-image and / or the lug head sub-image meet the lug folding calibration morphology, determining the folded image area in the lug middle sub-image and / or the lug head sub-image.

[0087] Specifically, when determining the state of the lug of the lug to be tested based on the fused image, it is necessary to analyze the lug middle sub-image and the lug head sub-image in the fused image. Since the battery cell is generally placed flat, the middle and head of the lug are prone to collapse and fold. Compared with the root, the middle and head are better for judging whether the lug is folded; various lug shapes are annotated when training the model, and the model is optimized according to the lug shape. The lug folding shape is the shape in which the lug is folded. For example, the thickness of the folded lug is different from that of the normal lug, and the folded lug usually becomes thicker and deformed; after obtaining the lug middle sub-image and the lug head sub-image based on the fused image, the lug middle sub-image and the lug head sub-image are analyzed, and the lug middle sub-image and the lug head sub-image are compared with the lug folding calibration shape to determine the folded image area in the lug middle sub-image and the lug head sub-image.

[0088] In some embodiments, the folded image area is determined by a tab fold detection model; the tab fold detection model takes the tab middle sub-image and / or the tab head sub-image as input and the folded image area as output, and the tab fold detection model is constructed based on the data of the tab fold calibration morphology.

[0089] Specifically, when detecting whether the tab is folded, the folded image area is determined by the tab fold detection model. When establishing the tab fold detection model, the tab folding shape is first manually calibrated to determine under what circumstances the tab is folded; the middle sub-image of the tab and / or the sub-image of the tab head is input into the tab fold detection model. The tab fold detection model compares the input middle sub-image of the tab and / or the sub-image of the tab head with the calibrated tab fold shape, and finally outputs the folded image area.

[0090] In some embodiments, the tab state of the tab includes whether the tab to be tested is folded; the folding of the tab to be tested includes that the area of ​​the folded image region is greater than a folding area threshold.

[0091] Specifically, the folding area threshold can be understood as the maximum folding area when the tab can be welded normally. If the folding area of ​​the tab to be tested is greater than the folding area threshold, it means that the tab cannot be welded normally at this time, so as to avoid short circuit failure of the battery cell. When the area of ​​the folded image region of the tab to be tested is greater than the folding area threshold, it is determined that the tab to be tested is folded; if the folding area of ​​the tab to be tested is less than the folding area threshold, it will not affect the battery cell at this time, so it is determined that the tab to be tested is not folded.

[0092] Reference below Figure 8 The tab folding detection steps of the embodiment of the present invention are described by way of example, and the specific contents are as follows.

[0093] Step S3, obtaining a side image of the stacked tabs illuminated by the combined light source.

[0094] Step S4, using image fusion technology to fuse the pictures after the partition lighting, to obtain a fused image.

[0095] Step S5, manually annotating and training the folding features on the fused image to obtain a tab folding detection model.

[0096] Step S6: After the tab folding detection model extracts the folding region, the area of ​​the folding region is determined by post-processing and compared with the standard.

[0097] Step S7, the result is transmitted back to the industrial computer, and the industrial computer obtains the tab status and then displays the defect, outputs the result, etc.

[0098] Specifically, the present invention uses a multi-zone combined light source for lighting, and performs image fusion on the side view of the pole ear under multi-angle lighting, so that the folded state of the pole ear is more obvious through image fusion. After obtaining the fused image, manual annotation is used to make a training set and a test set, and then it is added to the convolutional neural network for training to obtain a deep learning model. The folded area is extracted according to the segmentation of the deep learning model, and finally the area of ​​the folded area is calculated by post-processing of the 2D algorithm and the standard value for judgment and waste removal.

[0099] In some embodiments, the tab state of the tab to be tested includes whether the number of structural layers of the tab to be tested is consistent with the standard number of layers of the tab to be tested; the number of structural layers of the tab to be tested is obtained based on the tab root sub-image; the tab root sub-image is obtained from the fused image.

[0100] Specifically, detecting the state of the lug to be tested also requires confirming whether the number of structural layers of the lug to be tested is consistent with the standard number of layers of the lug to be tested. The standard number of layers of the lug to be tested is certain. For example, if the standard number of layers of the lug to be tested is 5 layers, when detecting the state of the lug to be tested, in addition to detecting whether the lug to be tested is folded, the number of structural layers of the lug to be tested must also be detected; the lug root sub-image is obtained based on the fused image, and the number of structural layers of the lug to be tested is obtained by analyzing the lug root sub-image.

[0101] In some embodiments, the number of structural layers of the pole lug to be tested is obtained through a pole lug structural layer number detection model; the pole lug structural layer number detection model uses the pole lug root sub-image as input and the structural parameters of the pole lug to be tested as output, and the pole lug structural layer number detection model is constructed based on the pole lug calibration morphological data.

[0102] Specifically, when detecting the number of structural layers of the pole lug to be tested, the number of structural layers of the pole lug to be tested is determined by the pole lug structural layer number detection model. When establishing the pole lug structural layer number detection model, the features of the pole lugs in different forms are first manually calibrated to facilitate confirmation of the number of structural layers of the pole lug; the sub-image of the pole lug root is input into the pole lug structural layer number detection model, and the pole lug structural layer number detection model analyzes the input pole lug root sub-image and finally outputs the number of structural layers of the pole lug.

[0103] In some embodiments, the number of structural layers of the pole lug to be tested is the sum of the number of layers of all layer structural contours of the pole lug to be tested; the number of layers included in each layer structural contour is obtained by extracting the contour of the pole lug single-layer structure in the pole lug root sub-image through a pole lug structural layer number detection model and analyzing the structural contour of each layer.

[0104] Specifically, when the number of structural layers of the pole lug to be tested is obtained through the pole lug structural layer number detection model, the pole lug root sub-image is input into the pole lug structural layer number detection model, and the pole lug structural layer number detection model extracts the contour of the single layer of the pole lug in the pole lug root sub-image to obtain the structural contour of each layer of the pole lug, and then the number of layers of the structural contours of all layers of the pole lug to be tested is summed up to obtain the number of structural layers of the pole lug to be tested.

[0105] In some embodiments, when the obtained structure profile includes multiple layers, the number of layers of the structure profile takes the maximum value among the multiple numbers of layers.

[0106] Specifically, when the number of structural layers of the pole lug to be tested is obtained through the pole lug structural layer number detection model, the number of layers of the obtained structural contour can be one layer or multiple layers. If the number of layers of the obtained structural contour is multiple layers, the number of layers of the structural contour takes the maximum value among the multiple layers. For example, when the number of layers of the structural contour is multiple layers, the number of layers of the single-layer structural contour of the pole lug is 2 layers or 3 layers. At this time, the number of layers of the single-layer structural contour of the pole lug is 3 layers.

[0107] In some embodiments, before obtaining the number of structural layers of the pole lug to be tested according to the pole lug root sub-image, the pole lug state detection method further includes: preprocessing the pole lug root sub-image by edge tracking and region growing algorithm to enhance the edge features of each layer of the pole lug structure.

[0108] Specifically, when detecting the number of layers of the pole lugs, the image of the pole lug root is first preprocessed, and the sub-image of the lug root is preprocessed through edge tracking and region growing algorithms to enhance the edge features of each layer of the pole lugs, thereby avoiding overlapping of multiple layers of pole lugs, which would make the pole lug structure layer number detection model unable to recognize.

[0109] Reference below Fig. 9 The steps of detecting the number of tabs and layers in the embodiment of the present invention are described by way of example, and the specific contents are as follows.

[0110] Step S8, dividing the fused image into regions and extracting the lug root sub-image.

[0111] Step S9, preprocessing the tab root sub-image using edge tracking and region growing algorithms to enhance edge features and reduce the impact of overlapping multiple tabs.

[0112] Step S10, manually perform feature annotation on the preprocessed image, perform labeling training on tabs of different shapes, and obtain a tab structure layer number detection model.

[0113] Step S11, the tab structure layer number detection model segments and extracts the features of each tab layer.

[0114] Step S12, the result is transmitted back to the industrial computer, which counts the number of tab layers and compares it with the standard, and outputs the test result.

[0115] For example, the process of obtaining the number of tab layers is as follows: Fig.10 As shown, the lug root area is first obtained through the lug root sub-image, and then the structural contour of each layer is extracted, the extracted single-layer contour is analyzed, and finally the number of layers of all the layer structural contours of the lug is summed up to calculate the number of layers.

[0116] When the present invention detects the number of layers of tabs, the root image of the tabs is first preprocessed, and the edge features of each layer of tabs are enhanced by edge tracking and region growing algorithms to avoid overlapping of multiple tabs and the problem that the deep learning algorithm cannot recognize them. Subsequently, the tab features of different forms are manually annotated to create a deep learning model. Finally, the tab features are segmented and extracted by the deep learning model, and after being sent back to the industrial computer, the industrial computer outputs the final detection results.

[0117] In some embodiments, the tab status detection method further includes: prompting the tab status of the tab to be detected.

[0118] Specifically, after the state of the tab is detected, a prompt is given for the state of the tab, and the prompt information includes the specific number of layers of the tab to be tested and whether the tab to be tested is folded.

[0119] Reference below Fig.11 The tab status detection steps of the embodiment of the present invention are illustrated by way of example. According to different defect detections, visual inspection is performed in steps. The specific contents are as follows.

[0120] Step S13: image acquisition.

[0121] Step S14, start processing.

[0122] Step S15, extracting the tab area.

[0123] Step S16, whether the tab shape is folded, if yes, proceed to step S17, otherwise proceed to step S18.

[0124] Step S17, detection ends.

[0125] Step S18, segmenting the lug root area.

[0126] Step S19, segmenting the contour of each layer of the tab.

[0127] Step S20, segmenting the contour (single layer or multiple layers).

[0128] Step S21, calculating the number of layers.

[0129] Step S22, detection ends.

[0130] Step S23, output the result.

[0131] For example, the method for detecting tab folding is mainly divided into several steps of extracting the tab area, detecting the tab shape, extracting the tab root, and detecting the number of tab layers. The above steps are run in a data processing device.

[0132] When extracting the tab area, after the image acquisition device takes the image, the tab area is extracted through image preprocessing, which reduces processing time and facilitates subsequent detection.

[0133] When detecting the shape of the tab, the middle and head positions of the tab are detected using a deep learning algorithm. If there is a fold, the detection is exited and the detection process ends. If there is no fold, the number of tab layers is detected.

[0134] When extracting the root area of ​​the lug, the lug naturally hangs down during the production process, causing the multiple layers of lugs at the head and middle of the lug to stick together, making it impossible to count the number of layers. Therefore, the root of the lug is extracted by dividing the area to facilitate the detection of the number of lug layers.

[0135] When testing the number of tab layers, the root area of ​​the tab that has been split is segmented into a single-layer tab. The parts where multiple tabs overlap and bond are counted according to the maximum number of layers. All the tab layers are summarized and compared with the number of layers in design. If they are the same, the test passes; if they are different, the test fails and is discarded to prevent defective batteries from flowing out.

[0136] The present invention adopts a combined light source in the visual solution to eliminate the reflective effects of wrinkles on the surface of the metal pole ear and the like, and uses image fusion technology to obtain a fused image, so that the characteristics of the folded shape of the pole ear are more obvious. Finally, a prism is used to greatly reduce the installation space; and optimized deep learning is used for detection of the folded pole ear and the number of pole ear layers, and the detection accuracy is higher than that of the commonly used 2D algorithm and the ordinary deep learning algorithm.

[0137] A third aspect of the present invention provides an electronic device, such as Fig.12 As shown, the electronic device 300 includes: at least one processor 301 and a memory 302 .

[0138] Among them, at least one processor 301 is communicatively connected with the memory 302, and the memory 302 stores a computer program that can be executed by the at least one processor 301. When the at least one processor 301 executes the computer program, the tab state detection method is implemented.

[0139] According to the electronic device of the embodiment of the present invention, the corresponding tab state detection program can be stored in the memory. When the tab state detection method is implemented, the processor runs the program in the memory, and the image acquisition device obtains a fused image of multiple tab side images, determines the tab state of the tab to be tested based on the fused image, and accurately detects the number of tab layers and whether the tab states of all layers are folded.

[0140] A fourth aspect of the present invention provides a non-volatile readable storage medium having a computer program stored thereon, wherein the computer program implements a tab status detection method when the computer program is executed.

[0141] In the description of this specification, any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code including one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0142] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0143] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0144] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0145] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0146] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0147] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, substrates, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0148] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A tab status detection system, characterized in that: The method comprises at least one detection subsystem, wherein the detection subsystem comprises: A combined light source, the combined light source is used to emit irradiation light to the side of the pole lug to be measured at a plurality of different angles, so that the pole lug to be measured reflects reflected light containing side feature information of the pole lug to be measured; An image acquisition device is used to acquire reflected light of the irradiated light at each angle on the side of the electrode tab to be tested and generate an image.

2. The tab status detection system according to claim 1, characterized in that: The combined light source comprises: A plurality of annular light sources are arranged along a target direction and are concentrically arranged, wherein the target direction is a direction perpendicular to the side surface of the pole ear to be measured.

3. The tab status detection system according to claim 2, characterized in that: The radius of the multiple annular light sources decreases from the annular light source close to the pole lug to be measured to the annular light source far away from the pole lug to be measured.

4. The tab status detection system according to claim 2, characterized in that: The multiple annular light sources emit light in sequence according to a preset order to provide multiple emitted lights at different angles to the side of the electrode tab to be tested.

5. The tab status detection system according to claim 4, characterized in that: The combined light source also includes: A coaxial light source is located on a side of the plurality of annular light sources away from the pole ear to be measured, and is used to work when each of the annular light sources works to perform light compensation.

6. The tab status detection system according to claim 1, characterized in that: The detection subsystem also includes: An optical path direction conversion device is located on a side of the combined light source away from the pole ear to be measured, the optical path direction conversion device and the image acquisition device are at a preset angle, the reflected light from the pole ear to be measured passes through the combined light source and is incident on the optical path direction conversion device, and the optical path direction conversion device is used to refract the reflected light from the pole ear to be measured to the image acquisition device.

7. The tab status detection system according to claim 6, characterized in that: The optical path direction conversion device includes a prism.

8. The tab status detection system according to any one of claims 1 to 7, characterized in that: The tab state detection system includes a first detection subsystem and a second detection subsystem; The combined light source of the first detection subsystem is used to emit light to the first side of the positive electrode tab to be tested, and the combined light source of the second detection subsystem is used to emit light to the second side of the positive electrode tab to be tested, and the first side of the positive electrode tab to be tested is opposite to the second side of the positive electrode tab to be tested.

9. The tab status detection system according to claim 8, characterized in that: The tab state detection system further includes a third detection subsystem and a fourth detection subsystem; The combined light source of the third detection subsystem is used to emit light to the first side of the negative electrode tab to be tested, and the combined light source of the fourth detection subsystem is used to emit light to the second side of the negative electrode tab to be tested, and the first side of the negative electrode tab to be tested is opposite to the second side of the negative electrode tab to be tested.

10. The tab status detection system according to claim 9, characterized in that: The tab state detection system further comprises: A supporting structure, the first detection subsystem, the second detection subsystem, the third detection subsystem and the fourth detection subsystem are all arranged on the supporting structure, the combined light source in the first detection subsystem is arranged relative to the combined light source in the second detection subsystem, and the combined light source in the third detection subsystem is arranged relative to the combined light source in the fourth detection subsystem.

11. The tab status detection system according to claim 10, characterized in that: The support architecture includes: A support platform and a support frame, wherein the support frame is installed on the support platform, The support frame includes four vertical support rods that are arranged relatively at intervals, and the first detection subsystem, the second detection subsystem, the third detection subsystem and the fourth detection subsystem are respectively arranged on the four vertical support rods, wherein the image acquisition device of each detection subsystem is located above the corresponding combined light source.

12. The tab status detection system according to claim 11, characterized in that: The tab state detection system further comprises: The placement structure includes a placement platform, which is used to place the target battery cell including the tab to be tested, and the placement platform is located in the middle of the four vertical support rods.

13. The tab status detection system according to any one of claims 1 to 7, characterized in that: The tab state detection system further comprises: A data processing device is connected to the image acquisition device and is used to detect the state of the electrode tab to be tested according to the image acquired by the image acquisition device.

14. A method for detecting a tab state, characterized in that: include: Obtaining a fused image of a plurality of side images of the tab, wherein the plurality of side images of the tab are generated based on reflected light corresponding to a plurality of different angles of illumination of the side of the tab to be measured, wherein the reflected light contains characteristic information of the side of the tab to be measured; The tab state of the tab to be tested is determined according to the fused image.

15. The tab state detection method according to claim 14, characterized in that: Determining the tab state of the tab to be tested according to the fused image includes: Obtaining a lug middle sub-image and a lug head sub-image in the fused image, wherein the lug to be measured includes a lug head away from a battery cell body and a lug root connected to the battery cell body, and the lug to be measured also includes a lug middle portion located between the lug head and the lug root; When the tab middle sub-image and / or the tab head sub-image satisfy the tab folding calibration form, the folded image area in the tab middle sub-image and / or the tab head sub-image is determined.

16. The tab state detection method according to claim 15, characterized in that: The folded image area is determined by a tab fold detection model; The tab fold detection model takes the tab middle sub-image and / or the tab head sub-image as input and the folded image area as output. The tab fold detection model is constructed based on the data of the tab fold calibration morphology.

17. The method for detecting the state of a tab according to claim 15, characterized in that: The tab state of the tab to be tested includes whether the tab to be tested is folded; The folding of the electrode tab to be tested includes that the area of ​​the folded image region is greater than a folding area threshold.

18. The tab state detection method according to claim 15, characterized in that: The tab state of the tab to be tested includes whether the number of structural layers of the tab to be tested is consistent with the standard number of layers of the tab to be tested; The number of structural layers of the electrode tab to be tested is obtained based on the sub-image of the electrode tab root; The pole lug root sub-image is obtained from the fused image.

19. The tab state detection method according to claim 18, characterized in that: The number of structural layers of the electrode tab to be tested is obtained through a detection model of the number of structural layers of the electrode tab; The pole lug structure layer number detection model takes the pole lug root sub-image as input and takes the structure layer number of the pole lug to be tested as output, and the pole lug structure layer number detection model is constructed based on the pole lug calibration morphology data.

20. The tab status detection method according to claim 19, characterized in that: The number of structural layers of the electrode tab to be tested is the sum of the number of layers of all layer structural profiles of the electrode tab to be tested; The number of layers included in each layer structure contour is obtained by extracting the contour of the single-layer structure of the pole lug in the pole lug root sub-image through the pole lug structure layer number detection model and analyzing the contour of each layer structure.

21. The tab state detection method according to claim 20, characterized in that: When the obtained structural profile includes a plurality of layers, the number of layers of the structural profile takes the maximum value among the plurality of layers.

22. The tab state detection method according to claim 18, characterized in that: Before obtaining the number of structural layers of the to-be-tested tab according to the tab root sub-image, the tab state detection method further includes: The tab root sub-image is preprocessed by edge tracking and region growing algorithms to enhance edge features of each layer of tab structure.

23. The method for detecting the state of a tab according to any one of claims 14 to 22, characterized in that: The tab status detection method further includes: prompting the tab status of the tab to be tested.

24. An electronic device, characterized in that: include: at least one processor; a memory communicatively coupled to the at least one processor; The memory stores a computer program that can be executed by the at least one processor, and when the at least one processor executes the computer program, the tab status detection method described in any one of claims 14-23 is implemented.

25. A non-volatile readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the tab status detection method described in any one of claims 14-23 is implemented.

Images