Detection device, detection method, and storage medium

Abstract

The application discloses a detection device, a detection method and a storage medium. The detection device comprises a detection head, a belt-shaped shielding piece, a first winding wheel, a second winding wheel and a first driving assembly. The first driving assembly drives the first winding wheel or the second winding wheel to rotate. The axis of the first winding wheel and the axis of the second winding wheel are arranged in parallel. The axis of the first winding wheel is coaxially arranged with the axis of the winding core roll. The first winding wheel winds the belt-shaped shielding piece. The second winding wheel unwinds the belt-shaped shielding piece. The belt-shaped shielding piece extends to beyond the first winding wheel on the side close to the winding core. The extension length is greater than the length of the tab extending out of the large surface of the winding core. The belt-shaped shielding piece intervenes in the winding of the winding core from the winding position of the tab, is synchronously followed to be clamped between the two adjacent tabs, is pulled out along the axial direction away from the winding core after the winding is completed, and the like. The detection head is aligned with the preset area of the winding core and emits a laser point to the preset area. The preset area is the area where the belt-shaped shielding piece intervenes in the winding of the winding core. The above-mentioned detection device can improve the accuracy of detecting the tab defects.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a detection device, detection method and storage medium. Background Technology

[0002] In related technologies, the core of a battery cell includes tabs, which are electrically connected to the electrodes of the battery cell to transmit electrical energy. During the production process of a battery cell, there is a risk of tab folding. Tab folding can lead to problems such as increased internal resistance and localized overheating in the battery cell, thus reducing its reliability.

[0003] Currently, the method for detecting whether tabs are folded involves emitting a laser into a designated area of ​​the core and determining whether there is a folding problem based on the metallic reflection characteristics of the tabs. However, during detection, lower-layer tabs on the core can adversely affect the detection of upper-layer tabs, potentially leading to misjudgments of the upper-layer tabs. Summary of the Invention

[0004] This application provides a detection device, a detection method, and a storage medium.

[0005] In a first aspect, the present application provides a detection device including a detection head, a strip-shaped shield, a first reel, a second reel, and a first drive assembly, wherein the first drive assembly drives the first reel or the second reel to rotate. The axis of the first winding wheel and the axis of the second winding wheel are arranged parallel to each other. The axis of the first winding wheel is coaxial with the axis of the core take-up roller. The first winding wheel winds up the strip-shaped shield, and the second winding wheel unwinds the strip-shaped shield. The strip-shaped shield extends beyond the first winding wheel from the side near the core, and the extension length is greater than the length of the tab extending out of the core. The strip-shaped shield intervenes in the winding of the core from the tab take-up point and is simultaneously clamped between two adjacent tabs. After the winding is completed, it is pulled out axially away from the core. The detection head is aligned with a preset area of ​​the core and emits laser points to the preset area, which is the area where the strip-shaped shielding member intervenes in the winding of the core.

[0006] In some embodiments, the thickness of the strip shield is less than the gap between the two tabs.

[0007] In some embodiments, the detection head emits at least three laser points toward the preset area. When the number of detected metal reflection points is equal to the number of laser points, the detection head determines that there is currently no tab fold in the preset area. When the number of detected metal reflection points is less than the number of laser points, the detection head determines that there is currently a tab fold in the preset area.

[0008] In some embodiments, the detection head emits at least four first laser points toward the preset area. When the area enclosed by the line connecting the detected first metal reflective points is equal to the first preset area, the detection head determines that there is currently no tab fold in the preset area. When the area enclosed by the line connecting the detected metal reflective points is not equal to the first preset area, the detection head determines that there is currently a tab fold in the preset area.

[0009] In some implementations, when the area enclosed by the line connecting the first detected metal reflective points is equal to the first preset area, the detection head also emits at least four second laser points towards the preset area. The area enclosed by the line connecting the at least four second laser points is located outside the area enclosed by the line connecting the at least four first laser points. When no metal reflective points are detected, the detection head determines that there is currently no tab cutting abnormality in the preset area. When the area enclosed by the line connecting the second detected metal reflective points is not equal to the second preset area, the detection head determines that there is currently a tab cutting abnormality in the preset area.

[0010] In some embodiments, the first reel is connected to the core take-up roller, and the first drive assembly drives the first reel to drive the core take-up roller to rotate synchronously.

[0011] Secondly, an embodiment of this application provides a detection method applied to the detection apparatus of any of the above embodiments, the detection method comprising: Control the first drive assembly to drive the first winding wheel or the second winding wheel to rotate, so that the strip-shaped shielding member intervenes in the winding of the core from the electrode lug winding point and is simultaneously clamped between two adjacent electrode lugs; The detection head is controlled to emit laser points toward the preset area, where the preset area is the region where the strip-shaped shielding member intervenes in the winding of the core. The presence of defects in the tab is determined based on the metal reflective points in the preset area.

[0012] In some embodiments, controlling the detection head to emit laser points toward the preset area includes: Control the detection head to emit at least three laser points toward the preset area; The step of determining whether the electrode tab has defects based on the metal reflective points in the preset area includes: When the number of detected metal reflective points is equal to the number of laser points, it is determined that there is currently no tab fold in the preset area; when the number of detected metal reflective points is less than the number of laser points, it is determined that there is currently a tab fold in the preset area.

[0013] In some embodiments, controlling the detection head to emit laser points toward the preset area includes: The detection head is controlled to emit at least four first laser points toward the preset area; The step of determining whether the electrode tab has defects based on the metal reflective points in the preset area includes: When the area enclosed by the line connecting the first detected metal reflective points is equal to the first preset area, it is determined that there is currently no tab fold in the preset area. When the area enclosed by the line connecting the first detected metal reflective points is not equal to the preset area, it is determined that there is currently a tab fold in the preset area.

[0014] In some embodiments, controlling the detection head to emit laser points toward the preset area further includes: When the area enclosed by the line connecting the first metal reflective points is equal to the first preset area, the detection head is controlled to emit at least four second laser points toward the preset area. The area enclosed by the line connecting the at least four second laser points is located outside the area enclosed by the line connecting the at least four first laser points. The step of determining whether the electrode tab has a defect based on the metal reflective points in the preset area also includes: When no metallic reflective points are detected, it is determined that there is currently no abnormality in the tab cutting in the preset area; When the area enclosed by the line connecting the detected second metallic reflective points is not equal to the second preset area, it is determined that there is an abnormality in the tab cutting in the preset area.

[0015] Thirdly, embodiments of this application provide a computer storage medium storing a computer program thereon, wherein when the computer program is executed by a processor, it implements the detection method of any of the above embodiments.

[0016] The beneficial effects of this application are: since the strip-shaped shielding member intervenes in the winding of the core from the electrode lug winding point and is simultaneously clamped between two adjacent electrode lugs, and is pulled out axially away from the core after winding is completed, when the detection head emits laser points for detection, the influence of the reflection of the lower electrode lug on the detection of the upper electrode lug can be avoided, thereby improving the accuracy of detecting electrode lug defects.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is one of the structural schematic diagrams of the detection device according to an embodiment of this application; Figure 2 This is one of the structural schematic diagrams of the detection device according to an embodiment of this application; Figure 3 This is one of the structural schematic diagrams of a normal electrode tab according to an embodiment of this application; Figure 4 This is one of the structural schematic diagrams of the defective electrode tab in the embodiments of this application; Figure 5 This is a second schematic diagram of the normal electrode tab in an embodiment of this application; Figure 6 This is a second schematic diagram of the defective electrode tab in an embodiment of this application; Figure 7 This is the third schematic diagram of the normal electrode structure according to the embodiments of this application; Figure 8 This is the third schematic diagram of the defective tab in the embodiments of this application; Figure 9 This is a schematic flowchart of the detection method according to the embodiments of this application.

[0020] Explanation of key component reference numerals: The device includes a detection head 20, a strip-shaped shield 30, a first winding reel 40, a second winding reel 50, a first drive assembly 60, a core take-up roller 300, a core 400, an anode plate 410, an electrode tab 411, a cathode plate 420, and a diaphragm 430. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. 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, and they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0026] Firstly, please refer to Figure 1 and Figure 2 The detection device 100 provided in this application includes a detection head 20, a strip-shaped shield 30, a first winding wheel 40, a second winding wheel 50, and a first driving assembly 60, which drives the first winding wheel 40 or the second winding wheel 50 to rotate.

[0027] The axis of the first winding wheel 40 and the axis of the second winding wheel 50 are set parallel to each other. The axis of the first winding wheel 40 is set coaxially with the axis of the core winding roller 300. The first winding wheel 40 winds up the strip-shaped shield 30, and the second winding wheel 50 unwinds the strip-shaped shield 30. The strip-shaped shield 30 extends beyond the first winding wheel 40 on the side near the core. The extension length is greater than the length of the tab extending out of the core. The strip-shaped shield 30 intervenes in the winding of the core from the tab winding point and is simultaneously clamped between two adjacent tabs. After the winding is completed, it is pulled out axially away from the core. The detection head 20 is aligned with the preset area of ​​the core and emits laser points to the preset area, which is the area where the strip-shaped shielding member 30 intervenes in the winding of the core.

[0028] In the aforementioned detection device 100, since the strip-shaped shielding member 30 intervenes in the winding of the core from the electrode lug winding point and is simultaneously clamped between two adjacent electrode lugs, and is pulled out axially away from the core after winding is completed, when the detection head 20 emits laser points for detection, the influence of the reflection of the lower electrode lug on the detection of the upper electrode lug can be avoided, thereby improving the accuracy of detecting electrode lug defects.

[0029] Specifically, the testing device 100 can be applied to the production line of battery cells. A battery cell may include a casing, a winding core 400, and an electrolyte. The winding core 400 is the core component of the battery cell that enables charging and discharging. Both the winding core 400 and the electrolyte are placed in the casing to work together and complete the electrochemical reaction, thereby realizing the storage and release of electrical energy.

[0030] The core 400 may include an anode sheet 410, a cathode sheet 420, and a separator 430. Both the anode sheet 410 and the cathode sheet 420 include a material layer and tabs 411. The tabs 411 are connected to one side of the material layer. The separator 430 separates the anode sheet 410 and the cathode sheet 420. The tabs 411 of the anode sheet 410 and the cathode sheet 420 are respectively connected to the two electrodes of the battery cell.

[0031] The core 400 is manufactured using a winding process. Specifically, the winding layers are: diaphragm 430 → cathode plate 420 → diaphragm 430 → anode plate 410. One end of the diaphragm 430 is fixed to the core take-up roller 300. The diaphragm 430 is wound one to two turns first, and then the cathode plate 420 and anode plate 410 are wound in and separated by the diaphragm 430. The core take-up roller 300 can also function as a winding needle.

[0032] The first reel 40 winds up the strip-shaped shield 30, and the second reel 50 unwinds the strip-shaped shield 30. The axes of the first reel 40 and the second reel 50 are set parallel to each other, which can make the winding and unwinding of the strip-shaped shield 30 smoother and prevent jamming and interruption.

[0033] The axis of the first winding roller 40 is coaxial with the axis of the core winding roller 300, allowing the strip-shaped blocking member 30 to intervene in the winding of the core 400. The strip-shaped blocking member 30 extends beyond the first winding roller 40 on the side near the core 400, with an extension length greater than the length of the tab 411 extending beyond the large surface of the core 400, thus allowing the strip-shaped blocking member 30 to completely block the lower tab 411. The strip-shaped blocking member 30 intervenes in the winding of the core 400 from the take-up point of the tab 411 and is simultaneously sandwiched between two adjacent tabs 411. After winding is completed, it is pulled out axially away from the core 400, allowing the strip-shaped blocking member 30 to separate from the core 400 after winding is completed, thereby not affecting the subsequent processes of the core 400.

[0034] The first drive assembly 60 drives either the first reel 40 or the second reel 50 to rotate. Specifically, Figure 1 In the illustrated embodiment, the first drive assembly 60 drives the first reel 40 to rotate. When the first reel 40 rotates, it can wind up the strip-shaped blocking member and simultaneously unwind the strip-shaped blocking member 30 from the second reel 50. In some embodiments, the first reel 40 can be connected to the core take-up roller 300, and its rotation can drive the core take-up roller 300 to rotate synchronously. In some embodiments, the first reel 40 can be separated from the core take-up roller 300, which can be driven to rotate by the second drive assembly. Through the coordinated operation of the first drive assembly 60 and the second drive assembly, synchronous rotation of the first reel 40 and the core take-up roller 300 can be achieved.

[0035] In other embodiments, the first drive assembly 60 drives the second reel 50 to rotate, and the first reel 40 can be connected to the core take-up roller 300. The core take-up roller 300 can be driven to rotate by the second drive assembly, thereby driving the first reel 40 to rotate synchronously. The first drive assembly 60 can drive the second reel 50 to rotate to unwind the strip-shaped shield 30, and the first reel 40 can wind up the strip-shaped shield 30 when it rotates.

[0036] It is understood that when the first drive assembly 60 drives the first winding wheel 40 or the second winding wheel 50 to rotate, the strip-shaped blocking member 30 can be inserted into the winding of the core 400 from the take-up point of the tab 411 and simultaneously clamped between the two adjacent tabs 411. Both the first drive assembly 60 and the second drive assembly include, but are not limited to, motors.

[0037] The detection head 20 detects whether there are tab 411 defects in a preset area of ​​the core 400. Tab 411 defects include, but are not limited to, tab 411 folding, tab 411 abnormal cutting, etc. The detection head 20 is aligned with the preset area of ​​the core 400 and emits a laser point towards the preset area. The preset area is the area where the strip-shaped shielding member 30 intervenes in the winding of the core 400, that is, the area where the upper tab 411 and the lower tab 411 are separated by the strip-shaped shielding member 30. When the detection head 20 emits a laser point towards the preset area of ​​the core 400 for detection, the strip-shaped shielding member 30 can separate the upper tab 411 and the lower tab 411, thereby avoiding the influence of the reflection of the lower tab 411 on the detection of the upper tab 411, thus improving the accuracy of tab 411 defect detection.

[0038] Because the strip-shaped shielding member 30 and the tab 411 are made of different materials, the reflective characteristics of the strip-shaped shielding member 30 to the laser (such as reflectivity and reflective intensity) are also different from those of the tab 411. Therefore, the presence of a defect in the tab 411 can be determined based on the reflective characteristics of a preset area of ​​the core 400. Optionally, the strip-shaped shielding member 30 can be a diaphragm 430.

[0039] In some embodiments, the thickness of the strip shield 30 is less than the gap between the two tabs 411.

[0040] Therefore, it can avoid the strip shield 30 being too thick, which would cause uneven diameter increase rate during winding and result in wrinkles on the tab 411. It can also avoid the strip shield 30 and the tab 411 being clamped too tightly after winding, which would cause the tab 411 to break when pulled out.

[0041] Specifically, since the thickness of the strip-shaped shield 30 is less than the gap between the two layers of tabs 411, on the one hand, when the strip-shaped shield 30 intervenes in the winding of the core 400 during the winding process, the strip-shaped shield 30 will not expand the diameter of the core 400, thereby avoiding wrinkles in the tabs 411 and preventing winding; on the other hand, the strip-shaped shield 30 and the tabs 411 will not be clamped too tightly, thereby preventing the tabs 411 from being torn off when the strip-shaped shield 30 is pulled away from the core 400 along the axial direction after winding is completed, thus ensuring product yield.

[0042] Optionally, the gap between the two positive electrode tabs 411 is: the thickness of the positive electrode material layer. 2+ diaphragm 430 thickness The cathode sheet has a thickness of 420mm, and the gap between the two negative electrode tabs (411mm) is: the thickness of the negative electrode material layer. 2+ diaphragm 430 thickness 2+ Anode sheet thickness 410.

[0043] In some implementations, please refer to Figures 1 to 4 The detection head 20 emits at least three laser points into the preset area. When the number of detected metal reflection points is equal to the number of laser points, the detection head 20 determines that there is no tab 411 flip in the preset area. When the number of detected metal reflection points is less than the number of laser points, the detection head 20 determines that there is tab 411 flip in the preset area.

[0044] Therefore, determining whether there is a tab 411 fold by the number of metal reflective points is convenient, simple, and can improve efficiency.

[0045] Specifically, in the preset area of ​​the core 400, the metallic reflective points are formed by the laser reflected from the tab 411. Figure 3 and Figure 4 In this implementation, the detection head 20 emits three laser points towards a preset area of ​​the winding core 400. The three laser points, when connected, form a triangle with a preset area. Please refer to... Figure 3 When the number of detected metal reflective points is equal to the number of laser points (i.e., there are three metal reflective points), the shape (triangle) formed by the metal reflective points is consistent with the shape (triangle) formed by the laser points, and their areas are basically equal. The detection head 20 can then determine that there is currently no tab 411 folding in the preset area. Here, "equal" can mean completely equal, or it can mean that the difference between the two is within a set range (such as a tolerance range).

[0046] Please combine Figure 4When the number of detected metal reflective points is less than the number of laser points (i.e., less than three metal reflective points), the pattern formed by the metal reflective points (strip pattern) is inconsistent with the pattern formed by the laser points (triangle), and their areas are also unequal. The detection head 20 determines that the preset area currently has a tab 411 folded. Another reflective point is formed by the reflection of the laser light by the strip-shaped shielding element 30. Figures 3 to 8 In the middle, the reflective points of the metal are yellow, and the reflective points of the strip-shaped shielding part 30 are red.

[0047] In other embodiments, the detection head 20 may emit three or more laser points toward a preset area of ​​the core 400.

[0048] In some embodiments, the detection head 20 may include multiple optical emitting ends, each emitting a laser point. In some embodiments, the detection head 20 may include multiple optical transmitters, each having an optical emitting end. In some embodiments, the detection head 20 includes an optical transmitter and multiple optical fibers, each optical fiber including an incident end and an emitting end. The laser emitted by the optical transmitter is incident into the multiple optical fibers through the multiple incident ends and exited by the multiple emitting ends, thereby forming at least three laser points.

[0049] In some implementations, please refer to Figures 5 to 6 The detection head 20 emits at least four first laser points into the preset area. When the area enclosed by the line connecting the detected first metal reflective points is equal to the first preset area, the detection head 20 determines that there is no tab 411 fold in the preset area. When the area enclosed by the line connecting the detected metal reflective points is not equal to the first preset area, the detection head 20 determines that there is tab 411 fold in the preset area.

[0050] Therefore, determining whether there is a tab 411 fold by measuring the area of ​​the metal reflective points is convenient, simple, and can improve efficiency.

[0051] Specifically, in the preset area of ​​the core 400, the metallic reflective points are formed by the laser reflected from the tab 411. Figure 5 and Figure 6 In the illustrated embodiment, the detection head 20 emits four first laser points towards a preset area of ​​the winding core 400. The four first laser points, when connected and enclosed, form a quadrilateral (the quadrilateral in the figure is a trapezoid), the area of ​​which is a first preset area. Please refer to... Figure 5 The area enclosed by the line connecting the first metal reflective points is the area of ​​a quadrilateral, and the area enclosed by the line is equal to the first preset area. The detection head 20 determines that there is currently no tab 411 fold in the preset area.

[0052] Please combine Figure 6The area enclosed by the line connecting the first metallic reflective points is the area of ​​a triangle, and the area enclosed by the line is not equal to the first preset area. The detection head 20 determines that the preset area currently has a tab 411 folded. The other reflective point is a reflective point formed by the reflection of laser light by the strip-shaped shielding member 30.

[0053] In other embodiments, the detection head 20 may emit more than four laser points toward a preset area of ​​the core 400.

[0054] In some implementations, please refer to Figures 7 to 8 When the area enclosed by the line connecting the first metal reflective points is equal to the first preset area, the detection head 20 also emits at least four second laser points into the preset area. The area enclosed by the line connecting the at least four second laser points is located outside the area enclosed by the line connecting the at least four first laser points. When no metal reflective points are detected, the detection head 20 determines that there is currently no tab 411 cutting abnormality in the preset area. When the area enclosed by the line connecting the second metal reflective points is not equal to the second preset area, the detection head 20 determines that there is currently tab 411 cutting abnormality in the preset area.

[0055] Therefore, determining whether there is an abnormality in the cutting of tab 411 by using the secondary laser emission point is convenient, simple, and can improve efficiency.

[0056] Specifically, when the tab 411 is abnormally cut, the size of the tab 411 is larger than that of the positive tab 411, meaning the abnormally cut tab 411 has an additional abnormal portion compared to the normal tab 411. When the area enclosed by the line connecting the first detected metal reflective points is equal to the first preset area, the detection head 20 can determine that there is currently no tab 411 folding in the preset area. The detection head 20 can then emit at least four second laser points towards the preset area of ​​the core 400 to further detect whether there is an abnormal cutting of the tab 411 in the preset area of ​​the core 400. The line connecting the at least four second laser points can form a polygon (the polygon in the figure is a trapezoid), and the area of ​​this polygon is the second preset area.

[0057] exist Figure 7 and Figure 8 In the illustrated embodiment, the detection head 20 emits seven second laser points towards a predetermined area of ​​the core 400. The area enclosed by the line connecting the seven second laser points is located outside the area enclosed by the line connecting the four first laser points, thereby enabling the detection of any abnormal cutting of the tab 411. Please refer to... Figure 7 When no metallic reflective points are detected, it indicates that the tab 411 is not outside the normal range of the tab 411, and the detection head 20 determines that there is no abnormality in the cutting of the tab 411 in the preset area.

[0058] Based on the emission from the second laser point, the second metallic reflective point is formed by the laser reflected from an abnormal part of the tab 411. Please refer to... Figure 8 The number of the second metal reflective points is two, and the area enclosed by the line connecting them is the area of ​​the strip region, which is not equal to the second preset area. The detection head 20 determines that there is an abnormality in the tab 411 cutting in the preset area.

[0059] In some implementations, please refer to Figure 1 The first winding wheel 40 is connected to the core take-up roller 300, and the first drive assembly 60 drives the first winding wheel 40 to drive the core take-up roller 300 to rotate synchronously. Thus, the winding and unwinding of the strip-shaped blocking member 30 and the winding process of the core 400 can be carried out simultaneously.

[0060] Specifically, the first winding reel 40 is connected to the core take-up roller 300, allowing the first winding reel 40 and the core take-up roller 300 to rotate synchronously. When the first winding reel 40 rotates, it can wind up the strip-shaped blocking member 30, thereby unwinding the strip-shaped blocking member 30 from the second winding reel 50. When the first drive assembly 60 drives the first winding reel 40 to drive the core take-up roller 300 to rotate synchronously, on the one hand, the rotation of the core take-up roller 300 can continue the winding process; on the other hand, when the first winding reel 40 rotates, it winds up the strip-shaped blocking member 30, causing the strip-shaped blocking member 30 to be unwound synchronously from the second winding reel 50, thus realizing that the winding and unwinding of the strip-shaped blocking member 30 is synchronized with the winding process of the core 400.

[0061] Secondly, please combine Figure 9 The present application provides a detection method applied to the detection device 100 of any of the above embodiments. The detection method includes: 01. Control the first drive assembly 60 to drive the first winding wheel 40 or the second winding wheel 50 to rotate, so that the strip-shaped blocking member 30 enters the winding of the core 400 from the rewinding point of the tab 411 and is simultaneously clamped between the two adjacent tabs 411. 03. Control the detection head 20 to emit laser points to the preset area, which is the area where the strip-shaped shielding member 30 is inserted into the winding core 400; 05. Determine whether there is a defect in tab 411 based on the metal reflective points in the preset area.

[0062] In the above detection method, the first drive assembly 60 drives the first winding wheel 40 or the second winding wheel 50 to rotate, so that the strip-shaped shielding member 30 enters the winding of the core 400 from the rewinding point of the tab 411 and is simultaneously clamped between the two adjacent tabs 411. When the detection head 20 emits laser points for detection, the reflection of the lower tab 411 can be avoided from affecting the detection of the upper tab 411, thereby improving the accuracy of detecting defects in the tab 411.

[0063] In some implementations, please refer to Figures 3 to 4 Controlling the detection head 20 to emit laser points towards a preset area includes: The detection head 20 is controlled to emit at least three laser points towards a preset area; Determine whether there are defects in tab 411 based on the metallic reflective points in the preset area, including: When the number of detected metal reflective points is equal to the number of laser points, it is determined that there is no tab 411 fold in the preset area. When the number of detected metal reflective points is less than the number of laser points, it is determined that there is tab 411 fold in the preset area.

[0064] In some implementations, please refer to Figures 5 to 6 Controlling the detection head 20 to emit laser points towards a preset area includes: The detection head 20 is controlled to emit at least four first laser points toward a preset area; Determine whether there are defects in tab 411 based on the metallic reflective points in the preset area, including: When the area enclosed by the line connecting the first metal reflective points is equal to the first preset area, it is determined that there is no tab 411 fold in the preset area. When the area enclosed by the line connecting the first metal reflective points is not equal to the preset area, it is determined that there is tab 411 fold in the preset area.

[0065] In some implementations, please refer to Figures 7 to 8 The method of controlling the detection head 20 to emit laser points to a preset area also includes: When the area enclosed by the line connecting the first metal reflective points is equal to the first preset area, the detection head 20 is controlled to emit at least four second laser points into the preset area, and the area enclosed by the line connecting the at least four second laser points is located outside the area enclosed by the line connecting the at least four first laser points. Determining whether tab 411 has defects based on the metallic reflective points in the preset area also includes: When no metallic reflective points are detected, it is determined that there is currently no abnormality in the cutting of tab 411 in the preset area; When the area enclosed by the line connecting the detected second metallic reflective points is not equal to the second preset area, it is determined that an abnormal cutting of tab 411 exists in the preset area. Specifically, in some embodiments, the detection device 100 may include a control module, which is electrically connected to the first drive component 60 and the detection head 20. The control module can control the operating state of the first drive component 60 and the detection head 20, and implement logical judgments, such as determining whether a tab 411 defect exists. The control module may be integrated into the detection head 20 or set separately from the detection head 20.

[0066] Thirdly, embodiments of this application provide a computer storage medium storing a computer program thereon, which, when executed by a processor, implements the detection method of any of the above embodiments.

[0067] Specifically, computer storage media can be volatile or non-volatile.

[0068] In some implementations, the detection method implemented when the computer program is executed by the processor includes: 01. Control the first drive assembly 60 to drive the first winding wheel 40 or the second winding wheel 50 to rotate, so that the strip-shaped blocking member 30 enters the winding of the core 400 from the rewinding point of the tab 411 and is simultaneously clamped between the two adjacent tabs 411. 03. Control the detection head 20 to emit laser points to the preset area, which is the area where the strip-shaped shielding member 30 is inserted into the winding core 400; 05. Determine whether there is a defect in tab 411 based on the metal reflective points in the preset area.

[0069] It should be noted that the above explanation of the implementation method and beneficial effects of the detection device 100 also applies to the detection method and storage medium of the embodiments of this application. To avoid redundancy, they will not be elaborated in detail here.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with an embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0071] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A detection device, characterized in that, It includes a detection head, a strip-shaped shield, a first reel, a second reel, and a first drive assembly, wherein the first drive assembly drives the first reel or the second reel to rotate; The axis of the first winding wheel and the axis of the second winding wheel are arranged parallel to each other. The axis of the first winding wheel is coaxial with the axis of the core take-up roller. The first winding wheel winds up the strip-shaped shield, and the second winding wheel unwinds the strip-shaped shield. The strip-shaped shield extends beyond the first winding wheel from the side near the core, and the extension length is greater than the length of the tab extending out of the core. The strip-shaped shield intervenes in the winding of the core from the tab take-up point and is simultaneously clamped between two adjacent tabs. After the winding is completed, it is pulled out axially away from the core. The detection head is aligned with a preset area of ​​the core and emits laser points to the preset area, which is the area where the strip-shaped shielding member intervenes in the winding of the core.

2. The detection device according to claim 1, characterized in that, The thickness of the strip-shaped shield is less than the gap between the two layers of tabs.

3. The detection device according to claim 1, characterized in that, The detection head emits at least three laser points toward the preset area. When the number of detected metal reflection points is equal to the number of laser points, the detection head determines that there is currently no tab fold in the preset area. When the number of detected metal reflection points is less than the number of laser points, the detection head determines that there is currently a tab fold in the preset area.

4. The detection device according to claim 1, characterized in that, The detection head emits at least four first laser points toward the preset area. When the area enclosed by the line connecting the detected first metal reflective points is equal to the first preset area, the detection head determines that there is currently no tab fold in the preset area. When the area enclosed by the line connecting the detected metal reflective points is not equal to the first preset area, the detection head determines that there is currently a tab fold in the preset area.

5. The detection device according to claim 4, characterized in that, When the area enclosed by the line connecting the first detected metal reflective points is equal to the first preset area, the detection head also emits at least four second laser points into the preset area. The area enclosed by the line connecting the at least four second laser points is located outside the area enclosed by the line connecting the at least four first laser points. When no metal reflective points are detected, the detection head determines that there is currently no tab cutting abnormality in the preset area. When the area enclosed by the line connecting the second detected metal reflective points is not equal to the second preset area, the detection head determines that there is currently a tab cutting abnormality in the preset area.

6. The detection device according to claim 1, characterized in that, The first reel is connected to the core take-up roller, and the first drive assembly drives the first reel to drive the core take-up roller to rotate synchronously.

7. A detection method, applied to the detection apparatus according to any one of claims 1-6, characterized in that, The detection method includes: Control the first drive assembly to drive the first winding wheel or the second winding wheel to rotate, so that the strip-shaped shielding member intervenes in the winding of the core from the electrode lug winding point and is simultaneously clamped between two adjacent electrode lugs; The detection head is controlled to emit laser points toward the preset area, where the preset area is the region where the strip-shaped shielding member intervenes in the winding of the core. The presence of defects in the tab is determined based on the metal reflective points in the preset area.

8. The detection method according to claim 7, characterized in that, The control of the detection head to emit laser points toward the preset area includes: Control the detection head to emit at least three laser points toward the preset area; The step of determining whether the electrode tab has defects based on the metal reflective points in the preset area includes: When the number of detected metal reflective points is equal to the number of laser points, it is determined that there is currently no tab fold in the preset area; when the number of detected metal reflective points is less than the number of laser points, it is determined that there is currently a tab fold in the preset area.

9. The detection method according to claim 7, characterized in that, The control of the detection head to emit laser points toward the preset area includes: The detection head is controlled to emit at least four first laser points toward the preset area; The step of determining whether the electrode tab has defects based on the metal reflective points in the preset area includes: When the area enclosed by the line connecting the first detected metal reflective points is equal to the first preset area, it is determined that there is currently no tab fold in the preset area. When the area enclosed by the line connecting the first detected metal reflective points is not equal to the preset area, it is determined that there is currently a tab fold in the preset area.

10. The detection method according to claim 9, characterized in that, The method of controlling the detection head to emit laser points toward the preset area further includes: When the area enclosed by the line connecting the first metal reflective points is equal to the first preset area, the detection head is controlled to emit at least four second laser points toward the preset area. The area enclosed by the line connecting the at least four second laser points is located outside the area enclosed by the line connecting the at least four first laser points. The step of determining whether the electrode tab has a defect based on the metal reflective points in the preset area also includes: When no metallic reflective points are detected, it is determined that there is currently no abnormality in the tab cutting in the preset area; When the area enclosed by the line connecting the detected second metallic reflective points is not equal to the second preset area, it is determined that there is an abnormality in the tab cutting in the preset area.

11. A computer storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the detection method according to any one of claims 7-10.

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