A method, device, electronic device and storage medium for visual inspection of welded joints

Abstract

The present application relates to a method, device, electronic device, and storage medium for visual inspection of joint welding, the method comprising: capturing an image of a first pole tab and a second pole tab to be welded to obtain an image of the first pole tab; determining whether the first pole tab and the second pole tab to be welded meet a joint welding condition based on the first pole tab image; performing a joint welding process on the first pole tab and the second pole tab when the first pole tab and the second pole tab to be welded meet the joint welding condition; capturing an image of the first pole tab and the second pole tab after the joint welding process to obtain an image of the second pole tab; and performing a joint welding visual inspection on the first pole tab and the second pole tab after the joint welding process based on the second pole tab image. Through the present application, the number of unnecessary welding operations can be reduced, thereby saving energy and increasing the service life of the welding mechanism. In addition, manual spot checks can be replaced to achieve full inspection, real-time, and rapid results.

Description

Technical Field

[0001] The present application relates to the field of computer technology, and in particular to a method, device, electronic device and storage medium for visual inspection of welds. Background Art

[0002] In the prior art, the tabs of 21700 (a newer cylindrical lithium battery standard) cylindrical batteries usually have two layers (one large and one small, such as Figure 1 As shown), and the process requires that the two layers of tabs be welded together, but there is currently no ultrasonic welding station visual inspection for welding the two layers of tabs at the unloading position of the winding machine. Summary of the Invention

[0003] This application provides a method, device, electronic device, and storage medium for visual inspection of tab welds to address the problem that there is no visual inspection of tab welds in the prior art. The technical solution of this application is as follows:

[0004] According to a first aspect of an embodiment of the present application, a method for visual inspection of joint welding is provided, the method comprising: performing image acquisition on a first pole tab and a second pole tab to be welded to obtain a first pole tab image; determining, based on the first pole tab image, whether the first pole tab and the second pole tab to be welded meet a joint welding condition; when the first pole tab and the second pole tab to be welded meet the joint welding condition, performing joint welding processing on the first pole tab and the second pole tab; performing image acquisition on the first pole tab and the second pole tab after the joint welding processing to obtain a second pole tab image; and performing joint welding visual inspection on the first pole tab and the second pole tab after the joint welding processing based on the second pole tab image.

[0005] Furthermore, determining whether the first and second tabs to be welded meet the welding conditions based on the first tab image includes: processing the first tab image, extracting first edge profile information corresponding to the first tab and second edge profile information corresponding to the second tab from the first tab image; and determining whether the first and second tabs to be welded meet the welding conditions based on the first edge profile information and the second edge profile information.

[0006] Furthermore, the determining whether the first pole tab and the second pole tab to be welded meet the welding condition based on the first edge profile information and the second edge profile information includes: judging whether the first pole tab and the second pole tab are simultaneously included in the first pole tab image based on the first edge profile information and the second edge profile information; when the first pole tab and the second pole tab are simultaneously included in the first pole tab image, determining the overlap of the first pole tab and the second pole tab according to the first edge profile information and the second edge profile information; when the overlap of the first pole tab and the second pole tab is greater than or equal to a preset overlap, determining that the first pole tab and the second pole tab to be welded meet the welding condition.

[0007] Furthermore, the method further includes: when the first electrode tab and the second electrode tab to be welded do not meet welding conditions, performing waste removal processing on the first electrode tab and the second electrode tab.

[0008] Furthermore, the visual inspection of the joint welding of the first and second pole tabs after the joint welding process is performed based on the second pole tab image includes: binarizing the second pole tab image to obtain a joint welding effect diagram corresponding to the second pole tab image; obtaining at least one of the following parameters based on the joint welding effect diagram: a weld point parameter corresponding to the weld point in the second pole tab image, a weld area parameter corresponding to the weld area in the second pole tab image, and a position of an overlapping area of ​​the first and second pole tabs after joint welding; and visual inspection of the joint welding of the first and second pole tabs after the joint welding process is performed based on at least one of the weld point parameter, the weld area parameter and the position of the overlapping area after joint welding.

[0009] Furthermore, the visual inspection of the joint welding of the first pole tab and the second pole tab after the joint welding process based on at least one of the weld point parameters, the welding area parameters and the position of the overlapping area after the joint welding includes: when any one of the weld point parameters, the welding area parameters and the position of the overlapping area after the joint welding does not meet the preset welding conditions, determining that the quality of the first pole tab and the second pole tab after the joint welding process is unqualified.

[0010] According to a second aspect of an embodiment of the present application, a joint welding visual inspection device is provided, the device comprising: a first pole tab image acquisition module, configured to capture images of a first pole tab and a second pole tab to be welded, to obtain a first pole tab image; a first joint welding visual inspection module, configured to determine, based on the first pole tab image, whether the first pole tab and the second pole tab to be welded meet a joint welding condition; a joint welding processing module, configured to perform joint welding processing on the first pole tab and the second pole tab when the first pole tab and the second pole tab to be welded meet the joint welding condition; a second pole tab image acquisition module, configured to capture images of the first pole tab and the second pole tab after the joint welding processing, to obtain a second pole tab image; and a second joint welding visual inspection module, configured to perform joint welding visual inspection on the first pole tab and the second pole tab after the joint welding processing, based on the second pole tab image.

[0011] Furthermore, the first joint welding visual inspection module includes: an edge contour information extraction submodule, which is used to process the first pole tab image and extract first edge contour information corresponding to the first pole tab and second edge contour information corresponding to the second pole tab from the first pole tab image; and a joint welding condition judgment submodule, which is used to determine whether the first pole tab and the second pole tab to be joint welded meet the joint welding conditions based on the first edge contour information and the second edge contour information.

[0012] According to a third aspect of an embodiment of the present application, an electronic device is provided, comprising: a processor; and a memory for storing instructions executable by the processor; wherein the processor is configured to execute the instructions to implement a method as described in any one of the first aspects above.

[0013] According to the fourth aspect of the embodiments of the present application, a computer-readable storage medium is provided. When the instructions in the storage medium are executed by the processor of an electronic device, the electronic device can execute any of the methods described in the first aspect of the embodiments of the present application.

[0014] According to a sixth aspect of the embodiments of the present application, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute any one of the methods described in the first aspect of the embodiments of the present application.

[0015] The technical solutions provided by the embodiments of this application bring at least the following beneficial effects:

[0016] In an embodiment of the present application, an image of the first and second pole tabs to be welded is captured to obtain a first pole tab image; based on the first pole tab image, it is determined whether the first and second pole tabs to be welded meet the welding conditions; when the first and second pole tabs to be welded meet the welding conditions, the first and second pole tabs are welded; an image of the first and second pole tabs after the welding process is captured to obtain a second pole tab image; based on the second pole tab image, the first and second pole tabs are visually inspected for the welding process. By adding a visual inspection for welding before welding, it is possible to perform welding only on workpieces that meet the welding conditions, reduce the number of unnecessary welding operations, thereby saving energy, and increase the service life of the welding mechanism. In addition, after welding, the welding effect inspection of the pole tabs can replace manual spot checks to achieve full inspection, real-time, and rapid results.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0019] Figure 1 Schematic diagram of the structure of a double-layer tab to be welded provided in an embodiment of the present application;

[0020] Figure 2 1 is a flow chart of a method for visual inspection of welds provided in an embodiment of the present application;

[0021] Figure 3 1 is a flow chart of determining whether a first tab and a second tab meet the joint welding conditions in the joint welding visual inspection method provided in an embodiment of the present application;

[0022] Figure 4 This is a schematic structural diagram of a double-layer tab that does not meet the welding conditions provided in an embodiment of the present application;

[0023] Figure 5 This is a welding effect diagram of the second tab image provided in an embodiment of the present application;

[0024] Figure 6 This is a schematic structural diagram of a tab with unqualified quality after welding provided in an embodiment of the present application;

[0025] Figure 7 This is a schematic diagram of the structure of the joint welding visual inspection device provided in the embodiment of the present application.

[0026] Figure 8 It is a block diagram of an electronic device for the fly-cut control method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to enable ordinary people in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0028] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0029] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for display, data for analysis, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0030] In the prior art, there is no visual inspection of the ultrasonic welding position of the two-layer tab welding at the unloading position of the winding machine. Based on this, the embodiment of the present application provides a method for visual inspection of welding, such as Figure 2 As shown, the method includes the following steps:

[0031] S201: Capturing images of a first tab and a second tab to be welded to obtain an image of the first tab;

[0032] In the embodiment of the present application, the first pole tab and the second pole tab to be welded are usually one large and one small. For example, the first pole tab can be a smaller pole tab and the second pole tab can be a larger pole tab. When acquiring an image, the first pole tab can be placed above the second pole tab and photographed from above the first pole tab. The acquired image of the first pole tab can be as follows: Figure 1 shown.

[0033] In an embodiment of the present application, an area array camera plus a coaxial light source may be used to capture images of the first and second tabs, wherein the coaxial light source may be located above the tabs.

[0034] S203: Determining whether the first tab and the second tab to be welded meet welding conditions based on the first tab image;

[0035] In the embodiment of the present application, satisfying the welding condition may mean that the placement of the first electrode tab and the second electrode tab meets the welding condition, and the next welding process can be performed.

[0036] In the embodiments of this application, Figure 3 As shown, determining whether the first tab and the second tab to be welded meet welding conditions based on the first tab image may include:

[0037] S301: Processing the first tab image, extracting first edge contour information corresponding to the first tab and second edge contour information corresponding to the second tab from the first tab image;

[0038] Among them, the extraction of the first edge contour information and the second edge contour information can be performed based on an existing edge detection algorithm, such as the Roberts operator (the Roberts operator is a cross differential operator, which is a gradient operator based on cross differential. The algorithm calculates the edge lines of the detection image through local differentials. It is often used to detect low-noise images with obvious edges and large brightness differences) or the Sobel operator (the Sobel operator combines Gaussian blur and first-order differential and calculates the approximate value of the brightness of the image. By comparing the brightness of the image edge, specific pixel points in the area that exceed the threshold are recorded as edge points), etc. This application does not limit the relevant algorithms.

[0039] S303: Determine whether the first electrode tab and the second electrode tab to be welded meet welding conditions based on the first edge profile information and the second edge profile information.

[0040] In the embodiment of the present application, determining whether the first electrode tab and the second electrode tab to be welded meet the welding condition based on the first edge profile information and the second edge profile information (i.e., step S303) may include:

[0041] Based on the first edge profile information and the second edge profile information, determining whether the first tab image includes both the first tab and the second tab;

[0042] When the first tab image includes both the first tab and the second tab, determining the overlap between the first tab and the second tab according to the first edge profile information and the second edge profile information;

[0043] When the overlap between the first electrode tab and the second electrode tab is greater than or equal to a preset overlap, it is determined that the first electrode tab and the second electrode tab to be welded meet the welding condition.

[0044] In the embodiment of the present application, the preset overlap can be set in advance, so that when the overlap between the first electrode tab and the second electrode tab is the preset overlap, the subsequent welding quality can be better guaranteed.

[0045] S205: When the first electrode tab and the second electrode tab to be welded meet welding conditions, welding the first electrode tab and the second electrode tab;

[0046] In some embodiments, if the first and second tabs to be welded do not meet the welding conditions and subsequent welding is performed, unnecessary welding times will be increased, energy consumption will be increased, and the life of the welding mechanism will be affected. Based on this, the weld visual inspection method may further include:

[0047] When the first electrode tab and the second electrode tab to be welded do not meet the welding conditions, the first electrode tab and the second electrode tab are subjected to waste removal processing.

[0048] In an embodiment of the present application, when the first tab image includes only the first tab or only the second tab, it indicates that one of the two tabs is missing. In this case, it can be determined that the first tab and the second tab to be welded do not meet the welding conditions.

[0049] Or, as Figure 4 As shown, when the overlap between the first electrode tab and the second electrode tab is less than a preset overlap, it can be determined that the first electrode tab and the second electrode tab to be welded do not meet the welding conditions.

[0050] In practical applications, the first electrode tab and the second electrode tab that do not meet the welding conditions are discarded and not welded, thereby reducing the number of unnecessary welding times.

[0051] S207: Capturing images of the first and second tabs after the welding process to obtain an image of the second tab;

[0052] In an embodiment of the present application, the second pole tab image is an image obtained by photographing the first pole tab and the second pole tab after the welding process. After the welding process, the surfaces of the first pole tab and the second pole tab have welding spots left after the welding process.

[0053] S209: Based on the second tab image, perform a visual inspection of the weld of the first tab and the second tab after the weld process.

[0054] In the embodiment of the present application, the visual inspection of the weld after the weld process is performed on the first tab and the second tab based on the second tab image (i.e., step S209) may include:

[0055] performing a binarization process on the second tab image to obtain a welding effect image corresponding to the second tab image;

[0056] Based on the weld effect image, obtaining at least one of the following parameters: a weld point parameter corresponding to a weld point in the second tab image, a weld area parameter corresponding to a weld area in the second tab image, and a position of an overlap area between the first tab and the second tab after welded;

[0057] Based on at least one of the weld point parameters, the weld area parameters, and the position of the overlapped area after the weld, a weld visual inspection is performed on the first and second tabs after the weld process.

[0058] In the embodiment of the present application, the actual second tab image can be converted into the following image by binarization processing: Figure 5 The welding effect diagram is shown.

[0059] The solder joint parameters may include parameters such as the area, size, and grayscale of a single solder joint. The solder joint parameters may be used to characterize the quality of a single solder joint, thereby screening out solder joints that meet actual welding effects.

[0060] The welding area parameter may refer to a position of a welding area boundary relative to upper and lower boundaries of the first tab and the second tab.

[0061] The position of the overlapping area of ​​the first and second tabs after welding may refer to the position of the overlapping area of ​​the two tabs relative to the edge of the second tab, for example, one tab is located in the middle of the other tab, or slightly above or below it.

[0062] In an embodiment of the present application, the visual inspection of the weld after the weld process of the first tab and the second tab is performed based on at least one of the weld point parameters, the weld area parameters, and the position of the overlap area after weld may include:

[0063] When any one of the welding point parameters, the welding area parameters and the position of the overlapping area after the welding does not meet the preset welding conditions, it is determined that the quality of the first electrode tab and the second electrode tab after the welding process is unqualified.

[0064] Specifically, failure of any one of the weld point parameters, the weld area parameters, and the overlap area position after weld welding to meet the preset weld conditions may include at least the following three situations: the weld point parameters failing to meet the preset weld point parameters, the weld area parameters failing to meet the preset weld area parameters, or the overlap area position after weld welding failing to meet the preset offset. It is understood that as long as any one of these situations occurs, the quality of the first and second electrode tabs after weld welding can be determined to be unqualified.

[0065] The fact that the solder joint parameters do not meet the preset solder joint parameters may specifically include: desoldering, too small a weld nugget, and overburning.

[0066] Desoldering may be due to the lack of soldering. Figure 5 The black spots shown are either very shallow (indicated by combining grayscale and area), or the welding is off-center (see position); the weld nugget is too small. Figure 5 The black spot area is too small; overburning is manifested as Figure 5 The black spot area is too large.

[0067] When the welding area parameters do not meet the preset welding area parameters, it can also be determined that the quality of the first electrode tab and the second electrode tab after the welding process is unqualified. Figure 6 As shown, the welding area is offset relative to the upper and lower boundaries of the two tabs, resulting in insufficient welding area. Therefore, it can be determined that the quality after the welding process is unqualified.

[0068] Furthermore, when the position of the overlapped region after welding does not meet a preset offset, the quality of the first and second electrode tabs after welding may be determined to be unqualified. For example, the position of the overlapped region is offset toward the upper edge of the second electrode tab.

[0069] In practical applications, the joint welding visual inspection method of the present application can be used for visual inspection of ultrasonic welding stations, and can also be used for other welding inspection stations, such as positive electrode welding stations, etc.

[0070] In the embodiment of the present application, by adding joint welding visual inspection before welding, joint welding can be performed only on workpieces that meet the welding conditions, reducing the number of unnecessary welding times, thereby saving energy and increasing the service life of the welding mechanism.

[0071] In addition, after welding, the welding effect of the tabs can be tested to determine the quality of the welding effect and control the quality of the battery cells. This can replace manual sampling and achieve full inspection, real-time and fast results.

[0072] In addition, after welding, the welding point and welding area information can be effectively used to accurately judge the welding effect, and make judgments on weld mark deviation, over-welding of the tabs, and poor weld penetration.

[0073] The present application also provides a visual inspection device for welding. Figure 7 As shown, the device may include:

[0074] A first tab image acquisition module 710 is configured to acquire images of the first tab and the second tab to be welded, and obtain an image of the first tab;

[0075] A first joint welding visual inspection module 720 is configured to determine whether the first tab and the second tab to be joint welded meet a joint welding condition based on the first tab image;

[0076] A welding processing module 730 is configured to perform welding processing on the first electrode tab and the second electrode tab when the first electrode tab and the second electrode tab to be welded meet welding conditions;

[0077] A second tab image acquisition module 740 is configured to capture images of the first tab and the second tab after the welding process to obtain a second tab image;

[0078] The second joint welding visual inspection module 750 is configured to perform joint welding visual inspection on the first and second tabs after the joint welding process based on the second tab image.

[0079] In some embodiments, the first weld visual inspection module may include:

[0080] an edge contour information extraction submodule, configured to process the first tab image and extract first edge contour information corresponding to the first tab and second edge contour information corresponding to the second tab from the first tab image;

[0081] The welding condition judgment submodule is used to determine whether the first electrode tab and the second electrode tab to be welded meet the welding condition based on the first edge profile information and the second edge profile information.

[0082] In some embodiments, the welding condition judgment submodule may include:

[0083] a tab determination unit, configured to determine whether the first tab image includes both the first tab and the second tab based on the first edge contour information and the second edge contour information;

[0084] an overlap determination unit, configured to determine an overlap between the first tab and the second tab according to the first edge profile information and the second edge profile information when the first tab image includes both the first tab and the second tab;

[0085] The welding condition judgment unit is used to determine whether the first electrode tab and the second electrode tab to be welded meet the welding condition when the overlap degree of the first electrode tab and the second electrode tab is greater than or equal to a preset overlap degree.

[0086] In some embodiments, the apparatus may further include:

[0087] The waste removal processing module is used to remove waste from the first electrode tab and the second electrode tab when the first electrode tab and the second electrode tab to be welded do not meet the welding conditions.

[0088] In some embodiments, the second weld visual inspection module may include:

[0089] a welding effect diagram determining submodule, configured to perform binarization processing on the second tab image to obtain a welding effect diagram corresponding to the second tab image;

[0090] a parameter acquisition submodule, configured to acquire, based on the weld effect image, at least one of the following parameters: a weld point parameter corresponding to a weld point in the second tab image, a weld area parameter corresponding to a weld area in the second tab image, and a position of an overlap area between the first tab and the second tab after welded;

[0091] The joint welding visual inspection submodule is used to perform joint welding visual inspection on the first and second tabs after the joint welding process based on at least one of the welding point parameters, the welding area parameters and the position of the overlapping area after the joint welding.

[0092] In some embodiments, the weld visual inspection submodule may include:

[0093] The joint welding visual inspection unit is used to determine that the quality of the first and second tabs after the joint welding process is unqualified when any one of the welding point parameters, the welding area parameters and the position of the overlapping area after the joint welding does not meet the preset joint welding conditions.

[0094] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0095] Figure 8 This is a block diagram of an electronic device for the visual inspection method for welding provided in an embodiment of the present application. The electronic device may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 8As shown. The electronic device includes a processor, a memory, a model interface, a display screen and an input device connected via a system bus. The processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The model interface of the electronic device is used to communicate with an external terminal through a model connection. When the computer program is executed by the processor, a method for determining the feedforward speed of a diaphragm is implemented. The display screen of the electronic device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the electronic device can be a touch layer covering the display screen, or a button, trackball or touchpad provided on the housing of the electronic device, or an external keyboard, touchpad or mouse, etc.

[0096] Those skilled in the art will understand that Figure 8 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the electronic device to which the solution of the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0097] In an exemplary embodiment, an electronic device is further provided, comprising: a processor; and a memory for storing instructions executable by the processor; wherein the processor is configured to execute the instructions to implement the method as in the embodiment of the present application.

[0098] In an exemplary embodiment, a computer-readable storage medium is further provided. When instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the method in the embodiment of the present application.

[0099] In an exemplary embodiment, a computer program product including instructions is also provided. When the computer program product is run on a computer, the computer is caused to perform the method in the embodiment of the present application.

[0100] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, which can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0101] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0102] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A method for visual inspection of joint welding, characterized in that: The method comprises: Capturing images of the first tab and the second tab to be welded to obtain an image of the first tab; Determining, based on the first tab image, whether the first tab and the second tab to be welded meet a welding condition, wherein when a degree of overlap between the first tab and the second tab is greater than or equal to a preset overlap, determining that the first tab and the second tab to be welded meet the welding condition; When the first electrode tab and the second electrode tab to be welded meet welding conditions, welding the first electrode tab and the second electrode tab; Capturing images of the first and second electrode tabs after the welding process to obtain an image of the second electrode tab; Based on the second tab image, a visual inspection of the weld of the first tab and the second tab after the weld process is performed.

2. The method for visual inspection of joint welding according to claim 1, characterized in that: The determining, based on the first tab image, whether the first tab and the second tab to be welded meet welding conditions includes: processing the first tab image, and extracting first edge profile information corresponding to the first tab and second edge profile information corresponding to the second tab from the first tab image; Based on the first edge profile information and the second edge profile information, it is determined whether the first electrode tab and the second electrode tab to be welded meet welding conditions.

3. The method for visual inspection of joint welding according to claim 2, characterized in that: The determining whether the first electrode tab and the second electrode tab to be welded meet welding conditions based on the first edge profile information and the second edge profile information includes: Based on the first edge profile information and the second edge profile information, determining whether the first tab image includes both the first tab and the second tab; When the first tab image includes both the first tab and the second tab, determining the overlap between the first tab and the second tab according to the first edge profile information and the second edge profile information; When the overlap between the first electrode tab and the second electrode tab is greater than or equal to a preset overlap, it is determined that the first electrode tab and the second electrode tab to be welded meet the welding condition.

4. The method for visual inspection of joint welding according to claim 1, characterized in that: The method further comprises: When the first electrode tab and the second electrode tab to be welded do not meet the welding conditions, the first electrode tab and the second electrode tab are subjected to waste removal processing.

5. The method for visual inspection of joint welding according to claim 1, characterized in that: The visual inspection of the weld after the first and second tabs are welded based on the second tab image includes: performing a binarization process on the second tab image to obtain a welding effect image corresponding to the second tab image; Based on the weld effect image, obtaining at least one of the following parameters: a weld point parameter corresponding to a weld point in the second tab image, a weld area parameter corresponding to a weld area in the second tab image, and a position of an overlap area between the first tab and the second tab after welded; Based on at least one of the weld point parameters, the weld area parameters, and the position of the overlapped area after the weld, a weld visual inspection is performed on the first and second tabs after the weld process.

6. The method for visual inspection of joint welding according to claim 5, characterized in that: The visual inspection of the weld after the weld process of the first tab and the second tab is performed based on at least one of the weld point parameters, the weld area parameters, and the position of the overlap area after weld, includes: When any one of the welding point parameters, the welding area parameters and the position of the overlapping area after the welding does not meet the preset welding conditions, it is determined that the quality of the first electrode tab and the second electrode tab after the welding process is unqualified.

7. A visual inspection device for joint welding, characterized in that: The device comprises: A first tab image acquisition module is used to acquire images of the first tab and the second tab to be welded, to obtain an image of the first tab; a first joint welding visual inspection module, configured to determine, based on the first tab image, whether the first tab and the second tab to be joint welded meet a joint welding condition, wherein when the overlap degree between the first tab and the second tab is greater than or equal to a preset overlap degree, it is determined that the first tab and the second tab to be joint welded meet the joint welding condition; a welding processing module, configured to perform welding processing on the first electrode tab and the second electrode tab when the first electrode tab and the second electrode tab to be welded meet welding conditions; A second tab image acquisition module is used to capture images of the first tab and the second tab after the welding process to obtain a second tab image; The second joint welding visual inspection module is used to perform joint welding visual inspection on the first and second tabs after the joint welding process based on the second tab image.

8. The joint welding visual inspection device according to claim 7, characterized in that: The first joint welding visual inspection module includes: an edge contour information extraction submodule, configured to process the first tab image and extract first edge contour information corresponding to the first tab and second edge contour information corresponding to the second tab from the first tab image; The welding condition judgment submodule is used to determine whether the first electrode tab and the second electrode tab to be welded meet the welding condition based on the first edge profile information and the second edge profile information.

9. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the joint welding visual inspection method according to any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that When the instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the joint welding visual inspection method according to any one of claims 1 to 6.

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