Welding control method, device, electronic device, storage medium, program product and welding system

Abstract

This application relates to a welding control method, device, electronic device, storage medium, program product, and welding system. The method includes: in response to a welding instruction for a battery electrode, obtaining the welding step and electrode information of the battery electrode; determining the battery electrode swing amplitude based on an amplitude gain coefficient matching the electrode information and the welding step; and performing swing welding on the battery electrode and a matching current collector plate based on the swing amplitude. This method can improve the penetration consistency and welding stability of the current collector plate welding process.

Description

Technical Field

[0001] The present application relates to the field of battery production control technology, and in particular to a welding control method, device, electronic equipment, storage medium, program product and welding system. Background Art

[0002] In the production process of cylindrical batteries, current collector plate welding is a production step to achieve comprehensive connection between the positive and negative electrodes and the current collector. The welding quality of the current collector plate welding can directly affect the stability and safety of battery use.

[0003] In order to improve the welding efficiency and quality of collector plate welding, the current collector plate welding process currently uses laser welding technology to connect the end face of the electrode cell with the collector plate, taking advantage of the high precision and high speed of laser welding to meet the technical requirements and quality control needs of collector plate welding.

[0004] However, in the process of using laser welding technology to weld the end face of the battery cell to the current collecting plate, it is easy to increase the welding slag defect rate of the current collecting plate welding due to excessive penetration or uneven penetration. For example, excessive penetration causes spattering, or defects and unfused conditions occur, which reduces the welding stability of the cylindrical battery current collecting plate welding, and thus affects the safety performance of the cylindrical battery cell. Summary of the Invention

[0005] Based on this, it is necessary to provide a welding control method, device, electronic device, computer-readable storage medium, computer program product and welding system that can improve the penetration consistency and welding stability of the collecting plate welding process to address the above technical problems.

[0006] In a first aspect, the present application provides a welding control method, the method comprising:

[0007] In response to a welding instruction for a battery electrode, obtaining welding steps and electrode information of the battery electrode;

[0008] Determining the swing amplitude of the battery electrode according to the amplitude gain coefficient matched with the electrode information and the welding step;

[0009] The battery pole piece and the current collecting plate matched with the battery pole piece are oscillated and welded based on the oscillation amplitude.

[0010] The above-mentioned welding control method can obtain the welding step and electrode information of the battery electrode when it is necessary to perform current collecting plate welding on the battery electrode, determine the amplitude gain coefficient of the battery electrode according to the electrode characteristics of the battery electrode reflected by the electrode information, determine the oscillation amplitude that meets the actual welding conditions of the battery electrode based on the amplitude gain coefficient and the welding step of the battery electrode, and perform oscillation welding on the battery electrode and the current collecting plate matching the battery electrode according to the oscillation amplitude. The above welding control method, on the one hand, considers the two dimensions of the battery electrode characteristics themselves and the basic welding parameters during the welding process, and determines the oscillation amplitude that meets the actual welding conditions of the battery electrode, which can effectively balance the energy distribution during the welding process and reduce the probability of uneven penetration. On the other hand, the oscillation amplitude is determined based on the amplitude gain coefficient and the welding step, so that the final oscillation amplitude is not less than the welding step during the welding process. When oscillating welding is subsequently performed according to the oscillation amplitude, the welding trajectories of adjacent oscillation areas can overlap, further reducing the risk of uneven penetration or unfusion defects, effectively improving the penetration consistency and welding stability of the collector plate welding process, and thereby improving the safety performance of the cylindrical battery cell.

[0011] In some embodiments, the method further comprises:

[0012] Obtaining a welding oscillation frequency of the battery electrode sheet and a welding speed determined based on production parameters of the battery electrode sheet;

[0013] The ratio of the welding speed to the welding oscillation frequency is determined as the welding step of the battery electrode.

[0014] In the above embodiment, the welding step of the battery electrode is determined by the welding speed and welding oscillation frequency of the battery electrode, so that the subsequent oscillation amplitude determined based on the welding step can meet any welding speed requirements, that is, the production rhythm requirements. Even in the case of high-speed welding, the stability of the welding process can be improved by welding based on the oscillation amplitude determined based on the welding step.

[0015] In some embodiments, the swing welding of the battery electrode sheet and the current collecting plate matched with the battery electrode sheet based on the swing amplitude includes:

[0016] performing a flattening process on the battery electrode to obtain a flattened electrode end surface;

[0017] determining an amplitude correction value of the oscillation amplitude when it is determined that the oscillation amplitude satisfies an amplitude correction condition based on the end surface gap information of the smoothed end surface of the electrode;

[0018] summing the amplitude correction value and the oscillation amplitude to obtain a target oscillation amplitude for performing a welding operation;

[0019] According to the target swing amplitude, the flattened end surface of the electrode and the current collecting plate matched with the battery electrode are swing-welded.

[0020] In the above embodiment, the amplitude of the swing amplitude is corrected by using the end surface gap information of the flattened end surface of the electrode, so that the final target swing amplitude can not only meet the welding requirements corresponding to the welding step, but also match the actual porosity of the flattened end surface of the electrode. When the target swing amplitude is subsequently used for swing welding, the penetration consistency and welding stability of the current collecting plate welding process can be effectively improved, thereby improving the safety performance of the cylindrical battery cell.

[0021] In some embodiments, the end surface pore information includes the pore diameter and pore position of each pore in the flattened end surface of the electrode; the method further includes:

[0022] Determining the welding quality correlation of each of the pores according to the position of each of the pores;

[0023] For each of the pores, if the welding quality correlation of the pore is greater than or equal to a preset correlation threshold, the pore is determined as a key pore of the electrode flattened end surface;

[0024] Comparing the pore diameter of each of the key pores with the theoretical pore specifications corresponding to the oscillation amplitude;

[0025] In the case that abnormal pores having a pore diameter larger than the theoretical pore size exist in each of the key pores, it is determined that the oscillation amplitude satisfies an amplitude correction condition.

[0026] In the above embodiment, by calculating the welding quality correlation of each pore, the key pores that have a greater impact on the welding quality are determined from multiple end surface pores, and based on the pore diameter of the key pores, it is determined whether the oscillation amplitude meets the amplitude correction condition, which can effectively reduce the correction amplitude of the oscillation amplitude and improve the accuracy and correction efficiency of the oscillation amplitude correction.

[0027] In some embodiments, determining the amplitude correction value of the swing amplitude includes:

[0028] According to the pore diameters of the abnormal pores, the abnormal pore with the largest pore diameter is determined as the corrected reference pore;

[0029] Calculating the difference between the pore diameter of the corrected reference pore and the diameter of the theoretical pore specification;

[0030] When the diameter difference is less than a correction threshold, determining the diameter difference as an amplitude correction value of the swing amplitude;

[0031] When the diameter difference is greater than or equal to the correction threshold, the correction threshold is determined as the amplitude correction value of the oscillation amplitude.

[0032] In the above embodiment, by setting the correction threshold of the swing amplitude, the risk of excessive correction of the swing amplitude can be effectively reduced, thereby improving the welding quality of the collecting plate.

[0033] In some embodiments, the flattening of the battery electrode to obtain a flattened electrode end surface includes:

[0034] Determining theoretical pore specifications of the flattened end surface of the battery electrode based on the oscillation amplitude;

[0035] Determining the flattening control parameters of the battery electrode according to the theoretical pore specifications;

[0036] The battery electrode is flattened according to the flattening control parameters to obtain a flattened electrode end face.

[0037] In the above embodiment, by reversely determining the flattening parameters based on the oscillation amplitude determined by the welding step, the regularity of the flattened end surface of the electrode obtained by the flattening process can be more closely matched with the oscillation amplitude, thereby reducing the probability of abnormal pores on the flattened end surface of the electrode and improving the welding quality.

[0038] In some embodiments, the method further comprises:

[0039] Acquiring a flattened end surface image of the flattened end surface of the electrode;

[0040] Based on the flattened end surface image, performing end surface contaminant detection on the flattened end surface of the electrode to obtain contamination information of the flattened end surface;

[0041] Determining cyclone dust removal parameters for the electrode flattened end surface before welding based on the flattened end surface contamination information;

[0042] The flattened end surface of the electrode is subjected to cyclone dust removal processing according to the cyclone dust removal parameters.

[0043] In the above embodiment, the end face contaminants of the flattened end face of the electrode are detected by using the flattened end face image, so that the flattened end face contamination information of the electrode can be quickly obtained, and the cyclone dust removal parameters are determined according to the flattened end face contamination information, so that the cyclone dust removal parameters can be matched with the actual contamination situation of the flattened end face, thereby improving the cyclone dust removal efficiency and reducing the energy consumption of the cyclone dust removal.

[0044] In some embodiments, the cyclone dust removal parameters include cyclone dust removal air pressure; and determining the cyclone dust removal parameters of the electrode flattened end surface before welding based on the flattened end surface contamination information includes:

[0045] Obtaining electrode piece welding failure information within a preset production cycle, a first air pressure-related weight corresponding to the electrode piece welding failure information, and a second air pressure-related weight corresponding to the flattened end surface contamination information;

[0046] Determining a first dust removal air pressure that matches the electrode piece welding defect information and a second dust removal air pressure that matches the flattened end face dirt information;

[0047] The cyclone dust removal pressure of the electrode flattened end face before welding is determined according to the first dust removal pressure, the first pressure-related weight, the second dust removal pressure, and the second pressure-related weight.

[0048] In the above embodiment, when determining the cyclone dust removal parameters, the relative importance of the flattened end face dirt information and the poor electrode welding information in determining the cyclone dust removal air pressure is taken into consideration at the same time, which can effectively improve the matching of the final determined cyclone dust removal air pressure and the battery electrode welding conditions, thereby improving the accuracy of the final determined cyclone dust removal air pressure.

[0049] In some embodiments, the method further comprises:

[0050] Acquire an end surface image of the electrode collector disk obtained after welding;

[0051] performing end surface contaminant detection on the electrode current collecting disc end surface according to the current collecting disc end surface image to obtain contamination information of the current collecting disc end surface;

[0052] Determining dust removal parameters of a brush on the end surface of the electrode current collecting disc based on the dirt information of the end surface of the current collecting disc;

[0053] The end surface of the electrode current collecting disk is subjected to a brush dust removal process according to the brush dust removal parameters.

[0054] In the above embodiment, the end face contaminants of the electrode collecting disk end face are detected through the end face image of the collecting disk, so that the dirt information of the collecting disk end face of the electrode flattened end face can be quickly obtained, and the brush dust removal parameters are determined according to the dirt information of the collecting disk end face. The brush dust removal parameters can be matched with the actual dirtiness of the collecting disk end face, thereby improving the dust removal efficiency of the brush and reducing the energy consumption of the dust removal by the brush.

[0055] In a second aspect, the present application further provides a welding control device, comprising:

[0056] An instruction response module, configured to respond to a welding instruction for a battery electrode and obtain welding steps and electrode information of the battery electrode;

[0057] an amplitude determination module, configured to determine the swing amplitude of the battery electrode according to an amplitude gain coefficient matched with the electrode information and the welding step;

[0058] A welding control module is used to perform swing welding on the battery pole piece and a current collecting plate matched with the battery pole piece based on the swing amplitude.

[0059] In a third aspect, the present application further provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0060] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the above method when executed by a processor.

[0061] In a fifth aspect, the present application also provides a computer program product, comprising a computer program, which implements the steps of the above method when executed by a processor.

[0062] In a sixth aspect, the present application further provides a welding system, comprising a welding assembly and a controller in communication with the welding assembly;

[0063] The welding assembly is used to perform a swing welding operation on a battery electrode and a current collecting plate matched with the battery electrode;

[0064] The controller is used to implement the steps of the above method.

[0065] The above-mentioned welding control method, device, electronic device, storage medium, computer program product and welding system can obtain the welding step and electrode information of the battery electrode when it is necessary to perform current collector welding on the battery electrode, determine the amplitude gain coefficient of the battery electrode according to the electrode characteristics of the battery electrode reflected by the electrode information, determine the oscillation amplitude that meets the actual welding situation of the battery electrode based on the amplitude gain coefficient and the welding step of the battery electrode, and perform oscillation welding on the battery electrode and the current collector matching the battery electrode according to the oscillation amplitude. The above welding control method, on the one hand, considers the two dimensions of the battery electrode characteristics themselves and the basic welding parameters during the welding process, and determines the oscillation amplitude that meets the actual welding conditions of the battery electrode, which can effectively balance the energy distribution during the welding process and reduce the probability of uneven penetration. On the other hand, the oscillation amplitude is determined based on the amplitude gain coefficient and the welding step, so that the final oscillation amplitude is not less than the welding step during the welding process. When oscillating welding is subsequently performed according to the oscillation amplitude, the welding trajectories of adjacent oscillation areas can overlap, further reducing the risk of uneven penetration or unfusion defects, effectively improving the penetration consistency and welding stability of the collector plate welding process, and thereby improving the safety performance of the cylindrical battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 is a structural block diagram of a welding system in some embodiments;

[0067] Figure 2 is a structural block diagram of a welding system in some other embodiments;

[0068] Figure 3 A schematic flow chart of a welding control method in some embodiments;

[0069] Figure 4 is a schematic diagram of a process for swing welding a battery electrode and a current collecting plate matched with the battery electrode based on swing amplitude in some embodiments;

[0070] Figure 5 Schematic diagram of the flow of welding control methods in other embodiments;

[0071] Figure 6 A schematic diagram of a flow chart for determining an amplitude correction value for a swing amplitude in some embodiments;

[0072] Figure 7 A schematic diagram of a process for flattening a battery electrode to obtain a flattened electrode end face in some embodiments;

[0073] Figure 8 Schematic diagram of the flow of welding control methods in other embodiments;

[0074] Figure 9 A schematic diagram of a process for determining cyclone dust removal parameters for the flattened end surface of an electrode before welding based on information about contamination of the flattened end surface in some embodiments;

[0075] Figure 10 Schematic diagram of the flow of welding control methods in other embodiments;

[0076] Figure 11 A schematic flow chart of a preparation phase of a welding control method in some embodiments;

[0077] Figure 12 A schematic diagram of oscillation amplitude and welding step in some embodiments;

[0078] Figure 13 A schematic flow chart of the actual welding stage of the welding control method in some embodiments;

[0079] Figure 14 A schematic flow chart of a post-welding inspection phase of a welding control method in some embodiments;

[0080] Figure 15 A schematic diagram of a qualified swing trajectory in some embodiments;

[0081] Figure 16Schematic diagram comparing the metallographic morphology after swing welding and the metallographic morphology after conventional welding in some embodiments;

[0082] Figure 17 Schematic diagram of welding line distribution of welding tracks in some embodiments;

[0083] Figure 18 is a structural block diagram of a welding control device in some embodiments;

[0084] Figure 19 1 is a diagram of the internal structure of an electronic device in some embodiments. DETAILED DESCRIPTION

[0085] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0086] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0087] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least some embodiments of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0088] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0089] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0090] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0091] Collector plate welding is a production step to achieve a comprehensive connection between the positive and negative electrodes and the current collector. It refers to the battery production process of precisely connecting the end faces of the battery cell pole pieces with the collector plate to achieve a comprehensive connection between the positive and negative electrodes of the battery and the current collector, so that the current can flow smoothly inside the battery.

[0092] At present, the collector plate welding process uses laser welding technology to connect the end face of the electrode cell to the collector plate. However, when using laser welding technology to weld the end face of the cell to the collector plate, traditional solutions use fixed-point laser welding, continuous laser welding, or fixed swing parameters for swing welding, which are prone to excessive penetration and uneven penetration, increasing the welding slag defect rate of the collector plate welding, reducing the welding stability of the cylindrical battery collector plate welding, and thus affecting the safety performance of the cylindrical battery cell.

[0093] In order to improve the safety performance of cylindrical battery cells, when it is necessary to weld the battery pole piece to the collector plate, the welding step and pole piece information of the battery pole piece can be obtained, and the amplitude gain coefficient of the battery pole piece can be determined according to the pole piece characteristics of the battery pole piece reflected by the pole piece information. Based on the amplitude gain coefficient and the welding step of the battery pole piece, the oscillation amplitude that meets the actual welding situation of the battery pole piece is determined, and the battery pole piece and the collector plate matching the battery pole piece are oscillated and welded according to the oscillation amplitude. The above welding control method, on the one hand, considers the two dimensions of the battery electrode characteristics themselves and the basic welding parameters during the welding process, and determines the oscillation amplitude that meets the actual welding conditions of the battery electrode, which can effectively balance the energy distribution during the welding process and reduce the probability of uneven penetration. On the other hand, the oscillation amplitude is determined based on the amplitude gain coefficient and the welding step, so that the final oscillation amplitude is not less than the welding step during the welding process. When oscillating welding is subsequently performed according to the oscillation amplitude, the welding trajectories of adjacent oscillation areas can overlap, further reducing the risk of uneven penetration or unfusion defects, effectively improving the penetration consistency and welding stability of the collector plate welding process, and thereby improving the safety performance of the cylindrical battery cell.

[0094] The welding control method provided in the embodiment of the present application can be applied to Figure 1 In the welding system shown in FIG. , the welding system includes a welding assembly 101 and a controller 102 in communication with the welding assembly 101 .

[0095] The welding assembly 101 is used to perform a swing welding operation on a battery electrode and a current collecting plate matched with the battery electrode.

[0096] Among them, the welding assembly 101 is an equipment assembly that performs the swing welding task. It can generate and emit lasers, focus the laser beam on the welding position of the battery electrode and the current collecting plate, and heat the material at the welding position to a molten state through a high-energy-density heat source. During the melting process, the materials will form a molten pool and mix with each other. As the laser beam moves, the molten pool gradually cools and solidifies, forming a strong weld and completing the welding operation. It is understandable that the welding assembly 101 may include a laser for generating and emitting lasers. The laser is the core device in the welding assembly 101 for generating a high-intensity laser beam. The laser in the welding assembly 101 can be any laser that can emit a high-intensity laser beam, such as a multimode fiber laser.

[0097] In some embodiments, the welding assembly 101 may include a single-mode ring spot continuous fiber laser. A single-mode ring continuous fiber laser refers to a ring fiber laser that can generate a single mode of emitted light, and its beam quality factor, i.e., M 2 The factor is close to 1, the beam quality is high, the energy distribution is uniform, the divergence angle is small, and it has the advantages of high spatial coherence, stable phase and polarization characteristics. In addition, the single-mode ring continuous fiber laser has a weak thermal penetration effect and high long-term operation stability, making it suitable for long-term continuous operation. Therefore, the use of a single-mode ring spot continuous fiber laser can effectively improve the welding quality of the battery pole piece and the collector plate through its advantages of high precision, high stability, and high energy density.

[0098] In some embodiments, the welding assembly 101 may further include a turning member for turning over the object to be welded, such as a turning machine, and a fixing member for fixing the object to be welded, such as a fixing clamp.

[0099] The controller 102 may be any control component with logic execution capability, such as an MCU, a microcontroller unit, etc.

[0100] In some embodiments, the controller 102 can respond to welding instructions for battery electrodes, obtain the welding step and electrode information of the battery electrodes, determine the oscillation amplitude of the battery electrodes based on the amplitude gain coefficient and welding step that match the electrode information, and control the welding assembly 101 to perform oscillation welding on the battery electrodes and the current collecting plate that matches the battery electrodes based on the oscillation amplitude and other welding parameters, such as welding step, welding frequency, etc.

[0101] In the above embodiment, the controller 102 in the welding system can consider the two dimensions of the battery electrode characteristics and the basic welding parameters during the welding process, and determine the oscillation amplitude that meets the actual welding conditions of the battery electrode. It can effectively balance the energy distribution during the welding process and reduce the probability of uneven penetration. The oscillation amplitude can also be determined based on the amplitude gain coefficient and the welding step, so that the final oscillation amplitude is not less than the welding step during the welding process. When oscillating welding is subsequently performed according to the oscillation amplitude, the welding trajectories of adjacent oscillation areas can overlap, further reducing the risk of uneven penetration or unfusion defects, effectively improving the penetration consistency and welding stability of the collector plate welding process, and thereby improving the safety performance of the cylindrical battery cell.

[0102] In some embodiments, the welding system further includes a flattening assembly in communication with the controller, wherein the flattening assembly is used to flatten the battery electrode to obtain a flattened electrode end surface.

[0103] Among them, the flattening process is a pre-treatment operation before the welding process of the battery pole piece and the current collector. Its purpose is to shape and squeeze the full pole ear at both ends of the positive and negative poles of the battery coil, so that the battery pole piece exposes the dense electrode end surface. Through shaping and squeezing, the contact area between the full pole ear and the current collector can be made larger and more uniform, thereby improving the welding quality and stability. The flattening assembly is an equipment component that performs the flattening process on the battery pole piece. For example, the flattening assembly may include a shaping component and a squeezing component, wherein the shaping component is used to shape the pole ear at both ends of the positive and negative poles of the battery coil, so that it changes from a curled state to a flat state. The squeezing component is used to squeeze the full pole ear on the basis of shaping.

[0104] In some embodiments, the controller can control the flattening assembly to flatten the battery electrode to obtain a flattened electrode end face.

[0105] In some embodiments, the controller can determine the theoretical pore specification information of the flattened end face of the battery electrode based on the swing amplitude, determine the flattening control parameters of the battery electrode according to the theoretical pore specification information, and control the flattening component to flatten the battery electrode according to the flattening control parameters to obtain the flattened end face of the electrode.

[0106] In the above embodiment, the controller is connected to the flattening component through communication, and can reversely determine the flattening control parameters during the flattening pre-treatment of the battery electrode according to the obtained oscillation amplitude, which can improve the matching degree between the flattening process and the ideal oscillation amplitude, thereby improving the end face quality of the flattened end face of the electrode obtained after flattening.

[0107] In some embodiments, the welding system further comprises a cyclone dust removal assembly in communication with the controller, wherein the cyclone dust removal assembly is used to perform cyclone dust removal on the flattened end surface of the electrode.

[0108] Among them, when welding the collecting plate to the flattened end face of the electrode, due to the influence of the cleanliness of the welding environment and the inevitable movement operation during the welding process, it is easy for the flattened end face of the electrode to be adsorbed or contaminated with impurities. If the welding operation is directly performed on the flattened end face of the electrode with impurities, the welding quality of the collecting plate will be greatly reduced, and the welding slag defect rate of the battery collecting plate will be increased.

[0109] Taking the battery cathode of a cylindrical battery as an example, when welding the current collector plate of a cylindrical battery, the current collector plate is usually welded to the battery anode first, and then the battery cell is flipped over, and then the current collector plate is welded to the battery cathode. During the flipping process, the flattened end surface of the battery cathode will inevitably come into direct or indirect contact with equipment such as the support cup, logistics belt, and flipping machine tooling, causing the flattened end surface of the cathode to adsorb impurities, which is easy to form pinhole explosion points during welding, increasing the welding slag defect rate, and thereby increasing the risk of battery self-discharge, seriously affecting the safety performance of the battery cell.

[0110] Therefore, in order to reduce the influence of impurities on the welding quality of the collecting plate, a cyclone dust removal component can be set in the welding system to perform cyclone dust removal on the flattened end surface of the electrode before welding.

[0111] Among them, the dust removal principle of the cyclone dust removal component is to remove impurities on the flattened end surface of the electrode, such as metal debris, dust and other pollutants, by blowing out a cyclonic airflow and adding local vacuum adsorption. It can be understood that the cyclone dust removal component can be installed at any position of the welding system, as long as it can perform cyclone dust removal on the flattened end surface of the electrode before welding. For example, the cyclone dust removal component can be set at the battery cell inlet of the electrode welding process, at a preset distance from the flattened end surface of the electrode. In some embodiments, the preset distance can range from 15 to 20 millimeters (mm), which can reduce the risk of collision with the battery cell due to being too close, and also reduce the risk of reduced dust removal effect due to the long distance between the cyclone dust removal component and the flattened end surface of the electrode.

[0112] In some embodiments, the cyclone dust removal device includes an air inlet pipe, a dust hood, an exhaust pipe, etc., wherein the dust hood is used to guide the dust removal airflow and improve the dust removal effect. In order to improve the overall dust removal effect of the flattened electrode end surface, it is understandable that the diameter of the dust hood can be designed to be larger than the diameter of the battery cell at the flattened electrode end surface.

[0113] In some embodiments, the cyclone dust removal device can not only perform cyclone dust removal on the flattened end surface of the electrode before welding, but also perform cyclone dust removal on the collecting plate before welding, so as to improve the overall welding effect by simultaneously improving the cleanliness of the flattened end surface of the electrode and the collecting plate waiting to be welded before welding.

[0114] In some embodiments, the controller can control the cyclone dust removal assembly to perform cyclone dust removal on the flattened end surface of the electrode when the flattened end surface of the electrode is transmitted to the welding process.

[0115] In some embodiments, the controller can obtain an image of the flattened end surface of the electrode, perform contamination detection on the flattened end surface based on the image, obtain contamination information on the flattened end surface, and determine cyclone dust removal parameters for the flattened end surface before welding based on the contamination information. The cyclone dust removal component can then be controlled to perform cyclone dust removal on the flattened end surface of the electrode according to the cyclone dust removal parameters.

[0116] In the above embodiment, by setting a cyclone dust removal component in the welding process, the flattened end face of the electrode flowing into the welding process to be prepared for collecting plate welding can be dust removed, which can effectively improve the cleanliness of the end face of the flattened end face of the electrode during welding, and thus improve the welding quality during the subsequent welding of the flattened end face of the electrode and the collecting plate.

[0117] In some embodiments, the welding system further includes a brush dust removal assembly in communication with the controller, wherein the brush dust removal assembly is used to perform a brush dust removal process on the end surface of the electrode collector plate obtained after the battery electrode sheet is welded.

[0118] Among them, after the current collector plate welding of the battery electrode is completed and the electrode current collector plate end face is obtained, the electrode current collector plate end face is generally subjected to appearance inspection, such as through the charge coupled device (CCD) to capture the image of the electrode current collector plate end face, and the electrode current collector plate end face is detected and judged for defects based on the collected image. Only products that are judged to be qualified, that is, OK, can enter the next production process.

[0119] Therefore, in order to improve the qualified rate of products after welding and reduce the probability of appearance inspection failure due to impurities adhering to the end surface of the electrode collector disc, a brush dust removal component can be set in the welding system to perform brush dust removal on the end surface of the electrode collector disc after welding.

[0120] The brush dust removal assembly operates by lifting and rotating the brush as it contacts the end surface of the electrode collector disc, removing impurities such as welding ash and slag from the welding process. The brush dust removal assembly can be installed anywhere in the welding system, as long as it can remove dust from the end surface of the electrode collector disc after welding. For example, the brush dust removal assembly can be installed at the discharge port of the electrode welding process.

[0121] In some embodiments, the brush dust removal assembly may include a driving member and a brush. The driving member is in communication with the controller, and the brush can be lifted and rotated under the drive of the driving member.

[0122] In some embodiments, the brush dust removal assembly may further include a dust removal hood and a dust removal duct. Impurities removed from the end surface of the electrode current collecting plate may pass through the dust removal hood, enter the dust removal duct, and flow out of the production area.

[0123] In some embodiments, the controller can obtain an image of the electrode collector plate end face after the battery electrode is welded and the electrode collector plate end face is obtained; perform end face contaminant detection on the electrode collector plate end face based on the image of the current collector plate end face to obtain the degree of dirtiness of the current collector plate end face; determine the brush dust removal parameters of the electrode collector plate end face based on the degree of dirtiness of the current collector plate end face; and control the brush dust removal component to perform brush dust removal on the electrode collector plate end face according to the brush dust removal parameters.

[0124] In the above embodiment, by providing a brush dust removal assembly during the welding process, the end face of the electrode collector disk that is about to come out of the welding process can be dusted, which can effectively improve the cleanliness of the end face of the product obtained after welding, thereby improving the pass rate of subsequent end face appearance inspections and reducing the welding slag defect rate of the battery collector disk welding.

[0125] In some embodiments, as Figure 2 As shown, a welding system is provided, which includes a welding component 101, a flattening component 103, a cyclone dust removal component 104, a brush dust removal component 105, and a controller 102 that is respectively communicatively connected to the welding component 101, the flattening component 103, the cyclone dust removal component 104 and the brush dust removal component 105.

[0126] Among them, the welding assembly 101 is used to perform an oscillating welding operation on the battery electrode and the current collector disk that matches the battery electrode, and includes a heat source component for providing a welding heat source, such as a single-mode annular spot continuous fiber laser 1011 that provides a laser beam. The flattening assembly 103 is used to flatten the battery electrode to obtain a flattened electrode end face. The cyclone dust removal assembly 104 is used to perform a cyclone dust removal process on the flattened electrode end face before welding. The brush dust removal assembly 105 is used to perform a brush dust removal process on the electrode current collector end face obtained after the battery electrode welding is completed.

[0127] The controller 102 will implement all control steps in the battery electrode collector plate welding process. The specific implementation method is described in detail in the specific method embodiment of the welding control method below.

[0128] In some embodiments, as Figure 3 As shown, a welding control method is provided, which is applied to Figure 1 Taking the controller 102 shown as an example, the method includes the following steps:

[0129] S302 , in response to a welding instruction for a battery electrode, obtaining welding steps and electrode information of the battery electrode.

[0130] The welding instruction is a command signal for instructing the collector plate welding operation on the battery electrode. It is understood that the welding instruction can be manually triggered by the battery production staff based on the actual production situation, for example, by sending the welding instruction for the battery electrode to the controller through the production staff's work terminal. It can also be automatically triggered by the monitoring system in the battery production process. For example, if the monitoring system detects that the battery electrode has completed the previous production process of the welding process, it can automatically trigger the welding instruction for the battery electrode.

[0131] Among them, the battery electrode is the core part of the battery that converts chemical energy into electrical energy. A battery usually contains an anode electrode and a cathode electrode. During the current collector plate welding process, the anode electrode and cathode electrode of the battery need to be welded to their respective matching current collector plates to enable the battery to efficiently transmit electrical energy during operation. The battery electrode in this embodiment can be any electrode in the battery that requires current collector plate welding. That is, when welding the anode electrode or cathode electrode in the battery to the current collector plate, the welding control method of this embodiment can be used to reduce the welding slag defect rate of the current collector plate welding.

[0132] The battery electrode welding step is used to characterize the distance traveled by the welding laser beam generated by the welding assembly during each swing along the welding direction. During swing welding, the laser beam moves linearly along the weld seam while simultaneously swinging perpendicular to the weld seam. Therefore, the welding direction can be considered to be the direction of motion parallel to the weld seam, i.e., the direction of movement of the laser beam during linear movement.

[0133] In some embodiments, the welding step of the battery electrode can be set by the production personnel according to the actual production situation, and the controller can obtain the welding step manually set by the production personnel according to the electrode identification of the battery electrode.

[0134] The electrode information of a battery electrode is information data used to characterize the welding characteristics of the battery electrode. Different electrode information of the battery electrode corresponds to different welding characteristics, and the corresponding optimal welding control parameters during welding will also be different. Therefore, when welding the battery electrode to the collector plate, the welding characteristics reflected by the electrode information of the battery electrode can be considered to determine the swing amplitude for the battery electrode that is more consistent with the actual situation of the battery electrode. For example, the electrode information can include the electrode material and / or electrode thickness of the battery electrode. Different electrode materials or different electrode thicknesses of the battery electrode will result in different corresponding swing amplitudes.

[0135] In some embodiments, the controller may be connected to a production management system, and obtain the electrode information of the battery electrode from the production management system according to the electrode identification of the battery electrode.

[0136] In some embodiments, the controller may obtain the welding step and electrode information of the battery electrode in response to a welding instruction for the battery electrode.

[0137] S304: Determine the swing amplitude of the battery electrode according to the amplitude gain coefficient matched with the electrode information and the welding step.

[0138] The swing amplitude is twice the maximum distance the laser beam deviates from the center point in the swing trajectory during welding. A larger swing amplitude widens the laser action area and disperses the energy distribution, which helps reduce penetration and increase weld width. A smaller swing amplitude concentrates the energy, increasing penetration and potentially causing spatter. While a larger amplitude can result in a wider laser action area and more uniform energy distribution, an excessively large swing amplitude can also lead to shallow penetration. To keep the swing amplitude within a reasonable range, the base swing amplitude corresponding to the welding step can be used as a benchmark to determine a reasonable welding swing amplitude.

[0139] Since the welding step represents the single movement distance generated by each swing of the welding laser beam generated by the welding assembly along the welding direction during the welding process of the battery electrode, it is only necessary to make the swing amplitude not less than the welding step. When the welding swing is made, the energy distribution during the swing welding can be made, and the swing trajectory can be overlapped, thereby reducing the probability of uneven penetration or unfusion defects.

[0140] Among them, the amplitude gain coefficient is the amplitude coefficient used to amplify the basic oscillation amplitude obtained based on the welding step, which can be used to indicate the degree to which the amplitude needs to be amplified. After determining the basic oscillation amplitude corresponding to the welding step according to the welding step, in order to improve the matching between the oscillation amplitude and the battery electrode to be welded, it is also necessary to consider the welding characteristics exhibited by the battery electrode due to its own characteristics. Therefore, the amplitude gain coefficient that matches the electrode information can be determined based on the electrode information. For example, the thicker the electrode thickness of the battery electrode, the larger the corresponding amplitude gain coefficient. Conversely, the thinner the electrode thickness of the battery electrode, the smaller the corresponding amplitude gain coefficient.

[0141] In some embodiments, the controller can determine the amplitude gain coefficient that matches the pole piece information based on the pole piece information of the battery pole piece, and at the same time determine the basic oscillation amplitude corresponding to the welding step, and based on the amplitude gain coefficient and the basic oscillation amplitude, determine the oscillation amplitude of the battery pole piece when performing the welding operation.

[0142] In some of the embodiments, the controller can obtain the preset correspondence between each electrode information and each amplitude gain coefficient from the production management system based on the electrode identification of the battery electrode, and based on the electrode information of the battery electrode, search for the amplitude gain coefficient that matches the electrode information of the battery electrode from the preset correspondence.

[0143] In some embodiments, the controller may determine the product of the amplitude gain coefficient and the basic oscillation amplitude as the oscillation amplitude of the battery electrode when performing the welding operation, and the amplitude gain coefficient is greater than 1. For example, the controller determines that the basic oscillation amplitude is 0.3 based on the welding step, and the amplitude gain coefficient matching the electrode information is 1.5, then the oscillation amplitude of the battery electrode can be determined to be A=0.3×1.5=0.45.

[0144] In some embodiments, the controller may determine the sum of the amplitude gain coefficient and the base oscillation amplitude as the oscillation amplitude of the battery electrode during the welding operation. For example, if the controller determines the base oscillation amplitude to be 0.3 based on the welding step and the amplitude gain coefficient matching the electrode information is 0.15, the oscillation amplitude of the battery electrode may be determined to be A = 0.3 + 0.15 = 0.45.

[0145] S306: Perform oscillation welding on the battery pole piece and the current collecting plate matched with the battery pole piece based on the oscillation amplitude.

[0146] In some embodiments, after obtaining the oscillation amplitude, the controller may perform oscillation welding on the battery electrode sheet and the current collector disk that matches the battery electrode sheet based on the oscillation amplitude. For example, the controller may directly control the welding assembly to emit a laser beam to perform oscillation welding on the pre-treated battery electrode sheet and the current collector disk that matches the battery electrode sheet based on the oscillation amplitude and other welding control parameters, such as welding speed and welding oscillation frequency.

[0147] In some embodiments, the swing welding process is a periodic swing welding process, and the controller can use any swing welding mode to perform the swing welding operation, and the swing welding mode includes but is not limited to circular swing, linear swing, 8-shaped swing, ∞-shaped swing, etc.

[0148] In some embodiments, the oscillating welding mode used in the oscillating welding process is circular oscillating welding, that is, the laser beam moves in a circular motion around the center of the weld. This oscillating mode enables the laser beam heat source to uniformly heat the weld area, which helps to reduce welding deformation and weld metal coarsening.

[0149] The above-mentioned welding control method can obtain the welding step and electrode information of the battery electrode when it is necessary to perform current collecting plate welding on the battery electrode, determine the amplitude gain coefficient of the battery electrode according to the electrode characteristics of the battery electrode reflected by the electrode information, determine the oscillation amplitude that meets the actual welding conditions of the battery electrode based on the amplitude gain coefficient and the welding step of the battery electrode, and perform oscillation welding on the battery electrode and the current collecting plate matching the battery electrode according to the oscillation amplitude. The above welding control method, on the one hand, considers the two dimensions of the battery electrode characteristics themselves and the basic welding parameters during the welding process, and determines the oscillation amplitude that meets the actual welding conditions of the battery electrode, which can effectively balance the energy distribution during the welding process and reduce the probability of uneven penetration. On the other hand, the oscillation amplitude is determined based on the amplitude gain coefficient and the welding step, so that the final oscillation amplitude is not less than the welding step during the welding process. When oscillating welding is subsequently performed according to the oscillation amplitude, the welding trajectories of adjacent oscillation areas can overlap, further reducing the risk of uneven penetration or unfusion defects, effectively improving the penetration consistency and welding stability of the collector plate welding process, and thereby improving the safety performance of the cylindrical battery cell.

[0150] The welding step is an important parameter that determines the basic oscillation amplitude and has a significant impact on welding quality. In some embodiments, the welding control method further includes obtaining the welding oscillation frequency of the battery electrode sheet and determining a welding speed based on the production parameters of the battery electrode sheet. The ratio of the welding speed to the welding oscillation frequency is determined as the welding step of the battery electrode sheet.

[0151] The welding speed of a battery electrode is a welding parameter used to measure the speed of movement of the welding heat source, namely the laser beam, during the welding process. It can refer to the weld length completed per unit time. The welding speed of a battery electrode is determined by the production parameters corresponding to the battery electrode, such as the production cycle. A faster production cycle results in a faster welding speed, while a slower production cycle results in a slower welding speed.

[0152] In some embodiments, in order to meet the high-speed production cycle of current battery products, the welding speed during the current collecting plate welding process can be set to ≥250 mm / s. Such a setting can meet the production cycle requirement of >150 ppm.

[0153] The welding oscillation frequency refers to the number of times the welding heat source oscillates per unit time during welding, typically expressed in Hertz. The welding oscillation frequency is related to the oscillation period of the welding heat source. The oscillation period is the time it takes for the welding heat source to oscillate from one side to the other and back to its original position. The oscillation frequency can be considered the inverse of the oscillation period.

[0154] In some embodiments, the controller can obtain the welding oscillation frequency of the battery electrode and the production parameters of the battery electrode, determine the welding speed based on the production parameters of the battery electrode, and determine the ratio of the welding speed to the welding oscillation frequency as the welding step of the battery electrode.

[0155] In the above embodiment, the welding step of the battery electrode is determined by the welding speed and welding oscillation frequency of the battery electrode, so that the subsequent oscillation amplitude determined based on the welding step can meet any welding speed requirements, that is, the production rhythm requirements. Even in the case of high-speed welding, the stability of the welding process can be improved by welding based on the oscillation amplitude determined based on the welding step.

[0156] During the welding process, the pore specifications of the end face gap in the end face to be welded also have a high correlation with the welding quality. Therefore, in the process of determining the welding control parameters, the pore specifications of the end face gap can be considered at the same time.

[0157] In some embodiments, as Figure 4 As shown, S306, performing swing welding on the battery pole piece and the current collecting plate matched with the battery pole piece based on the swing amplitude, including:

[0158] S402, flattening the battery electrode to obtain a flattened electrode end surface.

[0159] In some embodiments, the controller can control the flattening component of the welding system to flatten the battery electrode to obtain a flattened electrode end face.

[0160] S404 , determining an amplitude correction value of the oscillation amplitude when it is determined that the oscillation amplitude satisfies an amplitude correction condition based on the end surface gap information of the smoothed end surface of the electrode.

[0161] The end surface pore information is information data used to characterize the specifications of each pore in the flattened end surface of the electrode. For example, the end surface pore information may include the pore diameter and pore position of each pore.

[0162] The amplitude correction condition is a preset judgment condition used to determine whether the swing amplitude needs to be corrected. The amplitude correction condition is related to the specifications of each pore in the electrode flattened end face. For example, the amplitude correction condition is that the pore specifications of each pore meet the preset theoretical pore specifications.

[0163] If the swing amplitude meets the amplitude correction conditions, it means that if the current swing amplitude is used for swing welding, the effective contact area of the welding area may be reduced due to excessive pores during the welding process, thereby affecting the welding quality. In this case, the swing amplitude needs to be corrected to improve the subsequent welding quality. If the swing amplitude does not meet the amplitude correction conditions, it means that the current swing amplitude can meet the welding requirements and achieve higher welding quality.

[0164] The amplitude correction value is a specific parameter used to modify the oscillation amplitude. It can be determined based on the end face gap information, specifically the size of the pores in the smoothed electrode end face as reflected by the end face gap information. As can be seen, to minimize the impact of pores on weld quality, the oscillation amplitude should be as large as possible relative to the pore diameter. Therefore, the amplitude correction value is a positive value.

[0165] In some embodiments, the controller can determine whether the swing amplitude meets the amplitude correction condition based on the end surface gap information of the electrode flattened end surface, and determine the amplitude correction value of the swing amplitude based on the end surface gap information if the swing amplitude meets the amplitude correction condition.

[0166] In some embodiments, the end face gap information may include the pore diameters of each pore in the smoothed end face of the electrode. Based on the pore diameters of each pore, the controller may determine a reference pore diameter with the largest pore diameter, and determine the amplitude correction value of the oscillation amplitude by the difference between the reference oscillation amplitude and the oscillation amplitude corresponding to the reference pore diameter. The reference oscillation amplitude is the oscillation amplitude that meets welding requirements for the reference end face gap.

[0167] S406: Sum the amplitude correction value and the oscillation amplitude to obtain a target oscillation amplitude for performing the welding operation.

[0168] In some embodiments, after obtaining the amplitude correction value, the controller may sum the amplitude correction value and the swing amplitude to obtain a target swing amplitude for performing the welding operation.

[0169] S408, performing swing welding on the flattened end surface of the electrode and the current collecting plate matched with the battery electrode according to the target swing amplitude.

[0170] In some embodiments, the controller can perform oscillation welding on the flattened end face of the electrode and the current collecting plate matching the battery electrode according to the target oscillation amplitude in combination with other welding control parameters, such as welding speed and welding frequency.

[0171] In the above embodiment, the amplitude of the swing amplitude is corrected by using the end surface gap information of the flattened end surface of the electrode, so that the final target swing amplitude can not only meet the welding requirements corresponding to the welding step, but also match the actual porosity of the flattened end surface of the electrode. When the target swing amplitude is subsequently used for swing welding, the penetration consistency and welding stability of the current collecting plate welding process can be effectively improved, thereby improving the safety performance of the cylindrical battery cell.

[0172] In some embodiments, the end surface pore information includes the pore diameter and pore position of each pore in the flattened end surface of the electrode, such as Figure 5 As shown, the welding control method further includes:

[0173] S502: Determine the welding quality correlation of each pore according to the position of each pore.

[0174] The pore position is a position parameter used to characterize the location of the pore on the flattened end surface of the electrode. It can be understood that the pore position can be the center position coordinate of the pore or a set of position coordinates used to characterize the pore area.

[0175] The welding quality correlation is a parameter used to characterize the degree of impact of pores on welding quality. The welding quality correlation is related to the pore location. For example, the closer the pore location is to the welding area of the flattened electrode end face, the higher the welding quality correlation, indicating that the pore has a greater impact on the subsequent welding quality of the collector plate. Conversely, the farther the pore location is from the welding area of the flattened electrode end face, the lower the welding quality correlation, indicating that the pore has a lower impact on the subsequent welding quality of the collector plate.

[0176] In some embodiments, the controller may determine the welding quality correlation of each pore based on the pore position of each pore in the smoothed end face of the electrode.

[0177] In some embodiments, a correlation calculation model is pre-set in the controller, and the pore positions of the respective pores can be input into the correlation calculation model to obtain the welding quality correlation of the respective pores.

[0178] S504 , for each pore, if the welding quality correlation of the pore is greater than or equal to a preset correlation threshold, determine the pore as a key pore for the electrode flattening end face.

[0179] The preset correlation threshold is a preset threshold parameter used to determine whether a pore is a critical pore and can be determined by production personnel based on actual welding quality requirements. If the pore's welding quality correlation is greater than or equal to the preset correlation threshold, it can be considered that the pore has a significant impact on the welding quality of the collector plate weld and the pore is determined to be a critical pore in the flattened electrode end face. If the pore's welding quality correlation is less than the preset correlation threshold, it can be considered that the pore has a low impact on the welding quality of the collector plate weld and the pore can be determined to be a non-critical pore in the flattened electrode end face.

[0180] In some embodiments, for each pore, the controller can compare the welding quality correlation of the pore with a preset correlation threshold, and determine the pore as a key pore for flattening the end face of the electrode when the welding quality correlation of the pore is greater than or equal to the preset correlation threshold.

[0181] S506 , comparing the pore diameter of each key pore with the theoretical pore specification corresponding to the oscillation amplitude.

[0182] The theoretical pore size is the aperture specification parameter determined by the swing amplitude. That is, at the current swing amplitude, in order to achieve welding quality requirements, the aperture specifications that the critical pores must meet directly. As previously mentioned, the swing amplitude must be greater than or equal to the pore diameter to better meet welding requirements. Therefore, the corresponding theoretical pore size can be determined based on the swing amplitude. For example, the theoretical pore size can be a theoretical aperture value whose value is equal to the swing amplitude. The theoretical pore size can also be a theoretical aperture range, such as the pore diameter being less than the amplitude value corresponding to the swing amplitude.

[0183] In some embodiments, after obtaining the pore diameter of each key pore, the controller may compare each pore diameter with the theoretical pore specification corresponding to the oscillation amplitude.

[0184] S508 , when abnormal pores having pore diameters larger than theoretical pore specifications exist in each key pore, determining whether the oscillation amplitude satisfies an amplitude correction condition.

[0185] Among them, abnormal pores are critical pores whose pore diameters are larger than the theoretical pore specifications. If abnormal pores exist in the flattened electrode end face, it can be considered that swing welding according to the current swing amplitude cannot cover the critical pores in the flattened electrode end face, which will have a significant impact on the welding quality. Therefore, it is necessary to perform amplitude correction on the swing amplitude. If there are no abnormal pores on the flattened electrode end face, it can be considered that swing welding according to the current swing amplitude can cover the critical pores in the flattened electrode end face and will not have a significant impact on the welding quality. The controller can determine that the swing amplitude does not meet the amplitude correction conditions and directly perform swing welding according to the swing amplitude.

[0186] In some embodiments, the controller may determine key pores whose pore diameters are larger than the theoretical pore specifications as abnormal pores. When it is determined that abnormal pores exist in each key pore, it may be determined that the swing amplitude meets the amplitude correction condition and the swing amplitude needs to be corrected.

[0187] In the above embodiment, by calculating the welding quality correlation of each pore, the key pores that have a greater impact on the welding quality are determined from multiple end surface pores, and based on the pore diameter of the key pores, it is determined whether the oscillation amplitude meets the amplitude correction condition, which can effectively reduce the correction amplitude of the oscillation amplitude and improve the accuracy and correction efficiency of the oscillation amplitude correction.

[0188] In some embodiments, as Figure 6 As shown, the amplitude correction value of the swing amplitude is determined, including:

[0189] S602 , based on the pore diameters of the abnormal pores, determining the abnormal pore with the largest pore diameter as the corrected reference pore.

[0190] In some embodiments, when there are multiple abnormal pores on the flattened end surface of the battery, the controller can sort the abnormal pores according to their pore diameters and determine the abnormal pore with the largest pore diameter as the corrected reference pore.

[0191] S604, calculating the diameter difference between the pore diameter of the corrected reference pore and the diameter of the theoretical pore specification.

[0192] In some embodiments, the controller may calculate a diameter difference between the pore diameter of the corrected reference pore and the theoretical pore size. It is understood that since an abnormal pore is a pore with a pore diameter greater than the theoretical pore size, the pore diameter of the corrected reference pore is greater than the theoretical pore size, i.e., the diameter difference is a positive value.

[0193] S606: When the diameter difference is smaller than the correction threshold, the diameter difference is determined as the amplitude correction value of the swing amplitude.

[0194] The correction threshold is the maximum value at which the swing amplitude can be corrected. As mentioned above, while a larger swing amplitude can help reduce weld penetration and increase weld width, an excessively large swing amplitude can also lead to shallow weld penetration. Therefore, to prevent the swing amplitude from increasing indefinitely and affecting the final weld quality, a corresponding correction threshold can be set for the swing amplitude.

[0195] In some of the embodiments, the correction threshold of the swing amplitude can be directly set by production personnel according to actual welding conditions.

[0196] In some embodiments, production personnel may set a corresponding amplitude range for the swing amplitude, and the controller may determine a correction threshold corresponding to the current swing amplitude based on the amplitude range and the current swing amplitude.

[0197] In some embodiments, the controller may compare the calculated diameter difference with a correction threshold. If the diameter difference is smaller than the correction threshold, it indicates that the diameter difference may be used directly to correct the swing amplitude, and thus the diameter difference is determined as the correction value of the swing amplitude.

[0198] S608: When the diameter difference is greater than or equal to the correction threshold, the correction threshold is determined as the amplitude correction value of the swing amplitude.

[0199] In some embodiments, when the diameter difference is greater than or equal to a correction threshold, the controller may determine the correction threshold as an amplitude correction value of the oscillation amplitude, thereby reducing the risk of excessive oscillation amplitude and the impact of abnormal porosity on welding quality.

[0200] In the above embodiment, by setting the correction threshold of the swing amplitude, the risk of excessive correction of the swing amplitude can be effectively reduced, thereby improving the welding quality of the collecting plate.

[0201] In some embodiments, as Figure 7 As shown, S402, flattening the battery electrode to obtain a flattened electrode end surface, including:

[0202] S702: Determine the theoretical pore size of the flattened end surface of the battery electrode based on the swing amplitude.

[0203] In some embodiments, the controller may determine the theoretical pore size of the flattened end surface of the battery electrode based on the swing amplitude. It is understood that the theoretical pore size may be a pore diameter smaller than the amplitude of the swing amplitude.

[0204] S704: Determine the flattening control parameters of the battery electrode according to the theoretical pore size.

[0205] In some embodiments, after obtaining the theoretical pore size, the controller can determine the flattening control parameters for the battery electrode sheet based on the theoretical pore size. The flattening control parameters are parameter information used to control the flattening assembly, and the flattening control parameters may include but are not limited to the flattening roller feed amount, feed speed, and rotation speed.

[0206] S706 , flattening the battery electrode according to the flattening control parameters to obtain a flattened electrode end face.

[0207] In some embodiments, after obtaining the flattening control parameters, the controller can control the operation of the flattening component according to the flattening control parameters to flatten the battery electrode to obtain a flattened electrode end face.

[0208] In the above embodiment, by reversely determining the flattening parameters based on the oscillation amplitude determined by the welding step, the regularity of the flattened end surface of the electrode obtained by the flattening process can be more closely matched with the oscillation amplitude, thereby reducing the probability of abnormal pores on the flattened end surface of the electrode and improving the welding quality.

[0209] The above embodiment specifically describes how to determine the target oscillation amplitude and how to obtain a high-quality flattened electrode end face. However, when welding the flattened electrode end face to a collector tray, the cleanliness of the welding environment and the inevitable movement during the welding process can easily cause the flattened electrode end face to absorb or become contaminated with impurities. Directly welding the flattened electrode end face with impurities can significantly reduce the quality of the collector tray welding and increase the slag defect rate of the battery collector tray welding. Therefore, improving the cleanliness of the welded object is also an effective way to reduce the slag defect rate of battery collector tray welding.

[0210] In some embodiments, as Figure 8 As shown, the welding control method further includes the following steps:

[0211] S802, acquiring a flattened end surface image of the flattened end surface of the electrode.

[0212] In some embodiments, the controller can obtain an image of the flattened end surface of the electrode. For example, the controller can obtain an image of the flattened end surface captured and uploaded by an image acquisition device from a production management system based on the electrode surface identification of the battery electrode. In another example, the controller can be in communication with the image acquisition device to directly obtain the image of the flattened end surface captured by the image acquisition device.

[0213] S804: Based on the flattened end surface image, perform end surface contamination detection on the flattened end surface of the electrode to obtain contamination information of the flattened end surface.

[0214] The end face contamination detection is used to detect whether there are contaminants on the end face. By performing end face contamination detection on the flattened electrode end face, contamination information on the flattened electrode end face can be obtained. The contamination information on the flattened electrode end face can include the location, degree, and type of contamination.

[0215] In some embodiments, a contaminant detection model is pre-set in the controller. After obtaining the flattened end face image, the controller can call the contaminant detection model to perform end face contaminant detection on the flattened end face of the electrode based on the flattened end face image to obtain the flattened end face contamination information output by the contaminant detection model.

[0216] S806, determining cyclone dust removal parameters for the flattened end surface of the electrode before welding based on the dirt information of the flattened end surface.

[0217] The cyclone dust removal parameters are control parameters used to control the operation of the cyclone dust removal component. The cyclone dust removal parameters may include but are not limited to cyclone dust removal pressure, dust removal power, etc.

[0218] In some embodiments, the controller may determine the cyclone dust removal parameters for the flattened end surface of the electrode before welding based on the dirt information of the flattened end surface.

[0219] S808: Perform cyclone dust removal on the flattened end surface of the electrode according to cyclone dust removal parameters.

[0220] In some embodiments, the controller can control the operation of the cyclone dust removal component according to the cyclone dust removal parameters to perform cyclone dust removal on the flattened end surface of the electrode.

[0221] In the above embodiment, the end face contaminants of the flattened end face of the electrode are detected by using the flattened end face image, so that the flattened end face contamination information of the electrode can be quickly obtained, and the cyclone dust removal parameters are determined according to the flattened end face contamination information, so that the cyclone dust removal parameters can be matched with the actual contamination situation of the flattened end face, thereby improving the cyclone dust removal efficiency and reducing the energy consumption of the cyclone dust removal.

[0222] Furthermore, in some embodiments, the cyclone dust collection parameters include cyclone dust collection pressure, such as Figure 9 As shown, S806, determining the cyclone dust removal parameters of the electrode flattened end surface before welding based on the flattened end surface dirt information, including:

[0223] S902 , obtaining electrode welding failure information within a preset production cycle, a first air pressure-related weight corresponding to the electrode welding failure information, and a second air pressure-related weight corresponding to the flattened end face contamination information.

[0224] The electrode welding failure information can represent the number of electrode pieces with unsatisfactory welding within a preset production cycle. For example, the electrode welding failure information can be the electrode slag defect rate. The preset production cycle is the information reference period set by production personnel when collecting electrode welding failure information. By setting a preset production cycle, the amount of reference information can be reduced, and the speed of determining cyclone dust removal parameters can be improved.

[0225] The first air pressure-related weight is a weight coefficient used to represent the relative importance of poor electrode welding information in determining the air pressure of the cyclone dust collector. The larger the first air pressure-related weight, the higher the relative importance of the corresponding poor electrode welding information in determining the air pressure of the cyclone dust collector. Conversely, the smaller the first air pressure-related weight, the lower the relative importance of the corresponding poor electrode welding information in determining the air pressure of the cyclone dust collector.

[0226] The second air pressure-related weight is a weight coefficient used to represent the relative importance of the flattened end surface contamination information in determining the cyclone dust collection pressure. Similarly, the larger the second air pressure-related weight, the higher the relative importance of the corresponding flattened end surface contamination information in determining the cyclone dust collection pressure. Conversely, the smaller the second air pressure-related weight, the lower the relative importance of the corresponding flattened end surface contamination information in determining the cyclone dust collection pressure.

[0227] In some embodiments, the controller can obtain information on poor electrode welding within a preset production cycle, a first air pressure-related weight corresponding to the poor electrode welding information, and a second air pressure-related weight corresponding to information on contamination on the flattened end face.

[0228] In some embodiments, the first air pressure-related weight and the second air pressure-related weight are both fixed weight values, which are predetermined by production personnel based on actual production conditions and stored in the controller.

[0229] In some embodiments, the first air pressure-related weight and the second air pressure-related weight are non-fixed weight values, which can be determined in real time according to actual production conditions. For example, the first air pressure-related weight and the second air pressure-related weight can be related to production time. For example, at the beginning of production, the welding environment is relatively clean. At this time, the cyclone dust removal air pressure can be determined based on the dirt information of the flattened end face. Therefore, the second air pressure-related weight at this time will be greater than the first air pressure-related weight. In the later stage of production, due to long-term welding, the welding environment will be more or less polluted. At this time, the cyclone dust removal air pressure can be assisted in determining based on the poor electrode welding information within the preset production cycle. At this time, the first air pressure-related weight will be greater than the second air pressure-related weight.

[0230] S904, determining a first dust removal air pressure that matches the electrode piece welding defect information and a second dust removal air pressure that matches the flattened end face dirt information.

[0231] In some embodiments, the controller can determine a first dust removal pressure that matches the poor electrode welding information, and a second dust removal pressure that matches the flattened end face dirt information. For example, a first air pressure calculation function that determines the first dust removal pressure according to the poor electrode welding information, and a second air pressure calculation function that determines the second dust removal pressure according to the flattened end face dirt information can be pre-set in the controller. The first dust removal pressure that matches the poor electrode welding information is determined according to the first air pressure calculation function, and the second dust removal pressure that matches the flattened end face dirt information is determined according to the second air pressure calculation function. For another example, the controller pre-stores a first correspondence between each piece of poor electrode welding information and each first dust removal pressure, and a second correspondence between each piece of flattened end face dirt information and each second dust removal pressure. The controller can search the first correspondence to determine the first dust removal pressure that matches the poor electrode welding information, and search the second correspondence to determine the second dust removal pressure that matches the flattened end face dirt information.

[0232] S906: Determine the cyclone dust removal pressure for smoothing the electrode end surface before welding based on the first dust removal pressure, the first pressure-related weight, the second dust removal pressure, and the second pressure-related weight.

[0233] In some embodiments, the controller may add the product of the first dust removal pressure and the first pressure-related weight and the product of the second dust removal pressure and the second pressure-related weight to determine the cyclone dust removal pressure of the electrode flattened end face before welding.

[0234] In the above embodiment, when determining the cyclone dust removal parameters, the relative importance of the flattened end face dirt information and the poor electrode welding information in determining the cyclone dust removal air pressure is taken into consideration at the same time, which can effectively improve the matching of the final determined cyclone dust removal air pressure and the battery electrode welding conditions, thereby improving the accuracy of the final determined cyclone dust removal air pressure.

[0235] In addition to performing cyclone dust removal on the flattened end surface of the electrode before welding, the dust removal operation after welding can also effectively reduce the welding slag defect rate of the battery electrode collector plate welding.

[0236] In some embodiments, as Figure 10 As shown, the welding control method further includes the following steps:

[0237] S1002, obtaining an end surface image of the electrode current collecting disk obtained after welding.

[0238] In some embodiments, the controller can obtain an image of the collector plate end face of the electrode collector plate obtained after welding. For example, the controller can obtain an image of the collector plate end face captured and uploaded by an image acquisition device from a production management system based on the electrode face identification of the battery electrode. In another example, the controller can communicate with the image acquisition device to directly obtain the image of the collector plate end face captured by the image acquisition device.

[0239] S1004 , performing end surface contaminant detection on the electrode current collecting disk end surface according to the current collecting disk end surface image, and obtaining contamination information of the current collecting disk end surface.

[0240] The contamination information of the collector plate end surface is information data used to characterize the contamination condition of the electrode collector plate end surface, and may include the contamination position, contamination degree, contamination type, etc. of the electrode collector plate end surface.

[0241] In some embodiments, a contaminant detection model is pre-set in the controller. After obtaining the end face image of the collecting disk, the controller can call the contaminant detection model, perform end face contaminant detection on the flattened end face of the electrode based on the end face image of the collecting disk, and obtain the contamination information of the collecting disk end face output by the contaminant detection model.

[0242] S1006: Determine dust removal parameters of the brush on the end surface of the electrode current collecting disk based on the dirt information of the end surface of the current collecting disk.

[0243] The brush dust removal parameters are control parameters for controlling the operation of the brush dust removal component. The brush dust removal parameters may include but are not limited to the lifting range and rotation speed of the brush.

[0244] In some embodiments, the controller may determine brush dust removal parameters for the end surface of the electrode current collecting plate after welding based on the dirt information of the end surface of the current collecting plate.

[0245] In some embodiments, the dirtiness information of the collecting plate end surface may include the dirtiness of the collecting plate end surface, and the controller may determine the descending depth of the brush and the rotation speed of the brush according to the dirtiness.

[0246] S1008: Perform brush dust removal on the end surface of the electrode current collecting plate according to brush dust removal parameters.

[0247] In some embodiments, the controller can control the operation of the brush dust removal component according to the brush dust removal parameters to perform brush dust removal on the end surface of the electrode collecting plate.

[0248] In the above embodiment, the end face contaminants of the electrode collecting disk end face are detected through the end face image of the collecting disk, so that the dirt information of the collecting disk end face of the electrode flattened end face can be quickly obtained, and the brush dust removal parameters are determined according to the dirt information of the collecting disk end face. The brush dust removal parameters can be matched with the actual dirtiness of the collecting disk end face, thereby improving the dust removal efficiency of the brush and reducing the energy consumption of the dust removal by the brush.

[0249] In some embodiments, a welding control method is provided, wherein the welding control method is applied to Figure 2The welding system shown here uses the example of welding the cathode collector plate of a cylindrical battery. The welding control method can be divided into the preparation stage, the actual welding stage, and the post-weld inspection stage.

[0250] like Figure 11 As shown, the preparation phase specifically includes the following steps:

[0251] S1101 , in response to a welding instruction for a cylindrical battery electrode sheet, obtaining a welding oscillation frequency of a battery cell cathode of the cylindrical battery and a welding speed determined based on production parameters of the battery cell cathode.

[0252] It is understandable that in order to meet the needs of high-speed production (>150ppm), the welding speed of the collector plate is generally ≥250mm / s.

[0253] S1102: Determine the ratio of the welding speed to the welding oscillation frequency as the welding step of the battery cell cathode.

[0254] Among them, when setting the swing amplitude, it is also necessary to match the welding speed and welding swing frequency. The relationship between welding step, welding speed and welding swing frequency is: welding step = welding speed / swing frequency. The schematic diagram of swing amplitude and welding step is as follows Figure 12 As shown, V is the welding speed, f is the oscillation frequency, and A is the oscillation amplitude.

[0255] S1103, based on the swing amplitude, determine the theoretical pore size of the flattened end surface of the battery electrode.

[0256] S1104: Determine the flattening control parameters of the battery electrode according to the theoretical pore specifications.

[0257] S1105 , performing a flattening process on the anode and cathode of the cylindrical battery according to the flattening control parameters to obtain a flattened end surface of the anode and a flattened end surface of the cathode.

[0258] The controller can flatten the anode and cathode of the cylindrical battery cell according to the flattening control parameters, flattening the cathode and anode tabs of the battery cell to expose the dense flattened cathode and anode end faces. In some embodiments, the height of the flattened battery cell should be controlled to 90±1.5mm, the flatness of the flattened cathode and anode end faces should be controlled to ±0.5mm, and the maximum end face gap should be controlled to ≤0.4mm.

[0259] S1106, complete the anode collector plate welding and control the flipping machine to flip the end face of the battery cell.

[0260] Among them, since the anode collector plate welding is completed first, the anode collector plate welding does not require flipping the battery cell end face, and the possibility of contamination of the anode flattened end face is low. Therefore, in order to reduce welding costs, the anode collector plate welding can use traditional welding methods.

[0261] S1107, acquiring a flattened end surface image of the cathode flattened end surface.

[0262] S1108 , based on the flattened end face image, performing end face contaminant detection on the cathode flattened end face to obtain contamination information of the flattened end face.

[0263] S1109, obtaining electrode welding failure information within a preset production cycle, a first air pressure-related weight corresponding to the electrode welding failure information, and a second air pressure-related weight corresponding to the flattened end face contamination information.

[0264] S1110, determining a first dust removal air pressure that matches the electrode piece welding defect information and a second dust removal air pressure that matches the flattened end face dirt information.

[0265] S1111, determining the cyclone dust removal pressure of the electrode flattened end face before welding based on the first dust removal pressure, the first pressure-related weight, the second dust removal pressure, and the second pressure-related weight.

[0266] Among them, the necessity of the cyclone dust removal component to perform cyclone dust removal on the flattened end face of the cathode is that the battery cell holder has a center opening. Before the battery cell is flipped, the flattened end face of the cathode contacts the bottom of the holder. The impurity particles on the logistics belt will contaminate the flattened end face of the cathode through the center hole, which will increase the risk of welding spatter and the defective rate of welding slag.

[0267] It is understandable that the cyclone dust removal pressure can be adjusted in real time according to the degree of dirtiness of the cathode flattened end surface and the welding slag loss. In some embodiments, the cyclone dust removal pressure needs to be greater than 0.14 MPa.

[0268] S1112: Control the cyclone dust removal component to perform cyclone dust removal on the cathode flattened end surface according to the cyclone dust removal parameters.

[0269] like Figure 13 As shown, the actual cathode welding stage specifically includes the following steps:

[0270] S1301, obtaining the electrode information of the battery cell cathode.

[0271] S1302: Determine the oscillation amplitude of the cathode of the battery cell according to the amplitude gain coefficient and the welding step that match the electrode information.

[0272] S1303, determining the welding quality correlation of each pore according to the pore position of each pore in the cathode flattened end surface.

[0273] S1304 , for each pore, if the welding quality correlation of the pore is greater than or equal to a preset correlation threshold, determine the pore as a key pore for the electrode flattening end face.

[0274] S1305 , comparing the pore diameter of each key pore with the theoretical pore specification corresponding to the oscillation amplitude.

[0275] S1306, determine whether there are abnormal pores in each key pore, if not, execute S1307, if yes, execute S1308.

[0276] Among them, key pores with pore diameters larger than theoretical pore specifications are identified as abnormal pores.

[0277] S1307, according to the swing amplitude, control the welding assembly to swing weld the flattened end surface of the electrode and the current collecting plate matched with the battery electrode.

[0278] S1308 , based on the pore diameters of the abnormal pores, determine the abnormal pore with the largest pore diameter as the corrected reference pore.

[0279] S1309, calculating the diameter difference between the pore diameter of the corrected reference pore and the diameter of the theoretical pore specification.

[0280] S1310: Determine whether the diameter difference is less than the correction threshold. If so, execute S1311; if not, execute S1312.

[0281] S1311, determine the diameter difference as the amplitude correction value of the swing amplitude.

[0282] S1312: Determine the correction threshold as the amplitude correction value of the swing amplitude.

[0283] S1313, summing the amplitude correction value and the oscillation amplitude to obtain a target oscillation amplitude for performing the welding operation.

[0284] S1314, according to the target swing amplitude, control the welding assembly to swing weld the flattened end surface of the electrode and the current collecting plate that matches the battery electrode.

[0285] like Figure 14 As shown in the figure, the post-weld inspection stage specifically includes the following steps:

[0286] S1401, obtaining an end surface image of the cathode current collecting disk obtained after welding.

[0287] S1402 : performing end face contaminant detection on the cathode current collecting disk end face according to the current collecting disk end face image to obtain contamination information of the current collecting disk end face.

[0288] S1403: Determine dust removal parameters of a brush on the cathode current collecting plate end surface based on the contamination information of the current collecting plate end surface.

[0289] S1404: Perform brush dust removal on the end surface of the cathode current collecting plate according to the brush dust removal parameters.

[0290] S1405, performing weld appearance inspection on the cathode collector plate end surface obtained after brush dust removal.

[0291] S1406, determine whether the test result is qualified, if so, execute S1407, if not, execute S1408.

[0292] S1407, transporting the cathode current collecting plate end surface to the next process.

[0293] Among them, the next process is X-ray inspection.

[0294] S1408, transport the cathode current collecting plate end surface to the unqualified material processing area.

[0295] If the test result is unqualified (NG), the cathode collector disc end face is determined to be a defective end face, and the cathode collector disc end face is transported to the defective material processing area for defective product processing.

[0296] The welding control method in the above embodiment utilizes a single-mode ring oscillating welding method to improve the weld's compatibility with porous structures on the flattened end face, reduce molten pool velocity and temperature gradients, and improve energy distribution uniformity. This in turn improves compatibility with molten pool fluctuations caused by impurities, thereby enhancing welding stability, reducing the occurrence of pinhole explosions, and lowering the weld slag defect rate. Simultaneously, the cleanliness of the cathode flattened end face and cathode current collecting disc is enhanced at both the source and outlet ends, maximizing weld quality through a collaborative approach.

[0297] In some embodiments, the qualified oscillation trajectory obtained by the above welding control method is as follows: Figure 15 As shown, the metallographic morphology after swing welding is different from that of conventional welding. Figure 16 As shown in the figure, the two are obviously different. The effective weld width of swing welding is ≥0.4mm, and the welding trajectory is a staggered distribution of long and short welding lines, such as Figure 17 shown.

[0298] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0299] Based on the same inventive concept, embodiments of the present application also provide a welding control device for implementing the aforementioned welding control method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more welding control device embodiments provided below can be found in the above-described limitations of the welding control method and are not further elaborated here.

[0300] In some embodiments, as Figure 18 As shown, a welding control device 1800 is provided, comprising: an instruction response module 1801, an amplitude determination module 1802 and a welding control module 1803, wherein:

[0301] The instruction response module 1801 is used to respond to the welding instruction for the battery electrode and obtain the welding step and electrode information of the battery electrode.

[0302] The amplitude determination module 1802 is used to determine the swing amplitude of the battery electrode according to the amplitude gain coefficient matched with the electrode information and the welding step.

[0303] The welding control module 1803 is used to perform swing welding on the battery pole piece and the current collecting plate matched with the battery pole piece based on the swing amplitude.

[0304] In some embodiments, welding control device 1800 further includes:

[0305] The basic welding parameter acquisition module is used to obtain the welding oscillation frequency of the battery electrode and the welding speed determined based on the production parameters of the battery electrode.

[0306] The welding step determination module is used to determine the ratio of the welding speed to the welding oscillation frequency as the welding step of the battery electrode.

[0307] In some embodiments, the welding control module 1803 is used to: flatten the battery electrode to obtain a flattened end face of the electrode; determine the amplitude correction value of the swing amplitude when it is determined that the swing amplitude meets the amplitude correction condition based on the end face gap information of the flattened end face of the electrode; sum the amplitude correction value and the swing amplitude to obtain the target swing amplitude for performing the welding operation; and perform swing welding on the flattened end face of the electrode and the current collecting plate matching the battery electrode according to the target swing amplitude.

[0308] In some embodiments, the end surface pore information includes the pore diameter and pore position of each pore in the flattened end surface of the electrode. The welding control device 1800 also includes:

[0309] The welding quality correlation determination module is used to determine the welding quality correlation of each pore according to the position of each pore.

[0310] The key pore determination module is used to determine each pore as a key pore of the electrode flattening end face when the welding quality correlation of the pore is greater than or equal to a preset correlation threshold.

[0311] The comparison module is used to compare the pore diameter of each key pore with the theoretical pore specification corresponding to the swing amplitude.

[0312] The condition judgment module is used to determine whether the swing amplitude meets the amplitude correction condition when there are abnormal pores with pore diameters larger than the theoretical pore specifications in each key pore.

[0313] In some embodiments, the welding control module 1803 is used to: determine the abnormal pore with the largest pore diameter as the corrected reference pore based on the pore diameter of each abnormal pore; calculate the diameter difference between the pore diameter of the corrected reference pore and the theoretical pore specification; when the diameter difference is less than the correction threshold, determine the diameter difference as the amplitude correction value of the oscillation amplitude; when the diameter difference is greater than or equal to the correction threshold, determine the correction threshold as the amplitude correction value of the oscillation amplitude.

[0314] In some embodiments, the welding control module 1803 is used to: determine the theoretical pore specifications of the flattened end face of the battery electrode based on the swing amplitude; determine the flattening control parameters of the battery electrode according to the theoretical pore specifications; and flatten the battery electrode according to the flattening control parameters to obtain the flattened end face of the electrode.

[0315] In some embodiments, welding control device 1800 further includes:

[0316] The flattened end surface image acquisition module is used to acquire the flattened end surface image of the flattened end surface of the electrode.

[0317] The end face contaminant detection module is used to detect end face contaminants on the flattened end face of the electrode based on the flattened end face image to obtain contamination information of the flattened end face.

[0318] The cyclone dust removal parameter determination module is used to determine the cyclone dust removal parameters of the electrode flattened end surface before welding based on the dirt information of the flattened end surface.

[0319] The cyclone dust removal processing module is used to perform cyclone dust removal on the flattened end surface of the electrode according to the cyclone dust removal parameters.

[0320] In some embodiments, the cyclone dust removal parameters include cyclone dust removal air pressure. The cyclone dust removal parameter determination module is configured to: obtain information on poor electrode welding within a preset production cycle, a first air pressure-related weight corresponding to the poor electrode welding information, and a second air pressure-related weight corresponding to information on contamination of the flattened end face; determine a first dust removal air pressure that matches the poor electrode welding information, and a second dust removal air pressure that matches the information on contamination of the flattened end face; and determine the cyclone dust removal air pressure of the flattened end face of the electrode before welding based on the first dust removal air pressure, the first air pressure-related weight, the second dust removal air pressure, and the second air pressure-related weight.

[0321] In some embodiments, welding control device 1800 further includes:

[0322] The current collecting disc end face image acquisition module is used to acquire the current collecting disc end face image of the electrode current collecting disc end face obtained after welding is completed.

[0323] The end face contaminant detection module is used to detect end face contaminants on the electrode current collecting disc end face according to the current collecting disc end face image, and obtain the contamination information of the current collecting disc end face.

[0324] The brush dust removal parameter determination module is used to determine the brush dust removal parameters of the electrode collector plate end surface based on the dirt information of the collector plate end surface.

[0325] The brush dust removal module is used to perform brush dust removal on the end surface of the electrode collecting plate according to the brush dust removal parameters.

[0326] Each module in the aforementioned welding control device can be implemented in whole or in part through software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor within an electronic device in hardware form, or stored in a memory within the electronic device in software form, allowing the processor to call and execute the corresponding operations of each module.

[0327] In some embodiments, an electronic device is provided. The electronic device may be a controller, and its internal structure diagram may be as follows: Figure 19As shown. The electronic device includes a processor, a memory, and a network interface 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, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the electronic device is used to store data such as welding steps, pole piece information data, amplitude gain coefficient, and swing amplitude. The network interface of the electronic device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a welding control method is implemented.

[0328] Those skilled in the art will understand that Figure 19 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.

[0329] In some embodiments, an electronic device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the specific steps of the above-mentioned welding control method embodiment when executing the computer program.

[0330] In some embodiments, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the specific steps of the above-mentioned welding control method embodiment are implemented.

[0331] In some embodiments, a computer program product is provided, including a computer program, which implements the specific steps of the above-mentioned welding control method embodiment when executed by a processor.

[0332] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, storage, and display, etc.) involved in this application are all authorized by the user or have been fully authorized by all parties. Furthermore, the acquisition, storage, processing, and transmission of this data comply with relevant laws and regulations.

[0333] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the above-mentioned embodiments. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), data processing logic devices based on quantum computing, and the like.

[0334] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0335] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A welding control method, characterized in that: The method comprises: In response to a welding instruction for a battery electrode sheet, a welding step and electrode sheet information of the battery electrode sheet are obtained; the welding step is used to represent a single movement distance generated by each swing of the welding laser beam along the welding direction during the welding process of the battery electrode sheet; Determining a basic oscillation amplitude corresponding to the welding step, and determining the oscillation amplitude of the battery electrode according to an amplitude gain coefficient matched with the electrode information and the basic oscillation amplitude; the amplitude gain coefficient is an amplitude coefficient used to amplify the basic oscillation amplitude obtained based on the welding step; performing a flattening process on the battery electrode to obtain a flattened electrode end surface; determining an amplitude correction value of the oscillation amplitude when it is determined that the oscillation amplitude satisfies an amplitude correction condition based on the end surface gap information of the smoothed end surface of the electrode; summing the amplitude correction value and the oscillation amplitude to obtain a target oscillation amplitude for performing a welding operation; According to the target swing amplitude, the flattened end surface of the electrode and the current collecting plate matched with the battery electrode are swing-welded.

2. The method according to claim 1, characterized in that The method further comprises: Obtaining a welding oscillation frequency of the battery electrode sheet and a welding speed determined based on production parameters of the battery electrode sheet; The ratio of the welding speed to the welding oscillation frequency is determined as the welding step of the battery electrode.

3. The method according to claim 1, characterized in that The end surface pore information includes the pore diameter and pore position of each pore in the flattened end surface of the electrode; the method further includes: Determining the welding quality correlation of each of the pores according to the position of each of the pores; For each of the pores, if the welding quality correlation of the pore is greater than or equal to a preset correlation threshold, the pore is determined as a key pore of the electrode flattened end surface; Comparing the pore diameter of each of the key pores with the theoretical pore specifications corresponding to the oscillation amplitude; In the case that abnormal pores having a pore diameter larger than the theoretical pore size exist in each of the key pores, it is determined that the oscillation amplitude satisfies an amplitude correction condition.

4. The method according to claim 3, characterized in that Determining the amplitude correction value of the swing amplitude includes: According to the pore diameters of the abnormal pores, the abnormal pore with the largest pore diameter is determined as the corrected reference pore; Calculating the difference between the pore diameter of the corrected reference pore and the diameter of the theoretical pore specification; When the diameter difference is less than a correction threshold, determining the diameter difference as an amplitude correction value of the swing amplitude; When the diameter difference is greater than or equal to the correction threshold, the correction threshold is determined as the amplitude correction value of the oscillation amplitude.

5. The method according to any one of claims 1 to 4, characterized in that The flattening process of the battery electrode to obtain a flattened electrode end surface comprises: Determining theoretical pore specifications of the flattened end surface of the battery electrode based on the oscillation amplitude; Determining the flattening control parameters of the battery electrode according to the theoretical pore specifications; The battery electrode is flattened according to the flattening control parameters to obtain a flattened electrode end face.

6. The method according to claim 5, characterized in that The method further comprises: Acquiring a flattened end surface image of the flattened end surface of the electrode; Based on the flattened end surface image, performing end surface contaminant detection on the flattened end surface of the electrode to obtain contamination information of the flattened end surface; Determining cyclone dust removal parameters for the electrode flattened end surface before welding based on the flattened end surface contamination information; The flattened end surface of the electrode is subjected to cyclone dust removal processing according to the cyclone dust removal parameters.

7. The method according to claim 6, characterized in that The cyclone dust removal parameters include cyclone dust removal air pressure; the cyclone dust removal parameters of the electrode flattened end surface before welding are determined based on the flattened end surface dirt information, including: Obtaining electrode piece welding failure information within a preset production cycle, a first air pressure-related weight corresponding to the electrode piece welding failure information, and a second air pressure-related weight corresponding to the flattened end surface contamination information; Determining a first dust removal air pressure that matches the electrode piece welding defect information and a second dust removal air pressure that matches the flattened end face dirt information; The cyclone dust removal pressure of the electrode flattened end face before welding is determined according to the first dust removal pressure, the first pressure-related weight, the second dust removal pressure, and the second pressure-related weight.

8. The method according to claim 1 or 2, characterized in that The method further comprises: Acquire an end surface image of the electrode collector disk obtained after welding; performing end surface contaminant detection on the electrode current collecting disc end surface according to the current collecting disc end surface image to obtain contamination information of the current collecting disc end surface; Determining dust removal parameters of a brush on the end surface of the electrode current collecting disc based on the dirt information of the end surface of the current collecting disc; The end surface of the electrode current collecting disk is subjected to a brush dust removal process according to the brush dust removal parameters.

9. A welding control device, characterized in that: The device comprises: An instruction response module is used to respond to a welding instruction for a battery electrode sheet and obtain a welding step and electrode sheet information of the battery electrode sheet; the welding step is used to represent a single movement distance generated by each swing of the welding laser beam along the welding direction during the welding process of the battery electrode sheet; an amplitude determination module, configured to determine a basic oscillation amplitude corresponding to the welding step, and determine the oscillation amplitude of the battery electrode according to an amplitude gain coefficient matched with the electrode information and the basic oscillation amplitude; the amplitude gain coefficient is an amplitude coefficient used to amplify the basic oscillation amplitude obtained based on the welding step; A welding control module is used to flatten the battery electrode to obtain a flattened electrode end face; determine an amplitude correction value of the swing amplitude when it is determined based on the end face gap information of the flattened electrode end face that the swing amplitude meets the amplitude correction condition; sum the amplitude correction value and the swing amplitude to obtain a target swing amplitude for performing a welding operation; and perform swing welding on the flattened electrode end face and a current collecting plate matching the battery electrode according to the target swing amplitude.

10. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

12. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

13. A welding system, characterized in that: The welding system includes a welding assembly and a controller in communication with the welding assembly; The welding assembly is used to perform a swing welding operation on a battery electrode and a current collecting plate matched with the battery electrode; The controller is used to implement the steps of the method according to any one of claims 1 to 7.

14. The welding system according to claim 13, wherein: The welding system further includes a flattening component in communication with the controller; The flattening assembly is used to flatten the battery electrode to obtain a flattened electrode end surface; The controller determines the theoretical pore specification information of the flattened end face of the battery electrode based on the swing amplitude of the welding assembly, determines the flattening control parameters of the battery electrode according to the theoretical pore specification information, and controls the flattening assembly to flatten the battery electrode according to the flattening control parameters to obtain the electrode flattened end face.

15. The welding system according to claim 14, wherein: The welding system further includes a cyclone dust removal assembly in communication with the controller; The cyclone dust removal component is used to perform cyclone dust removal on the flattened end surface of the electrode; The controller obtains a flattened end face image of the flattened end face of the electrode; based on the flattened end face image, performs end face contaminant detection on the flattened end face of the electrode to obtain flattened end face contamination information; determines cyclone dust removal parameters of the flattened end face of the electrode before welding according to the flattened end face contamination information; and controls the cyclone dust removal component to perform cyclone dust removal on the flattened end face of the electrode according to the cyclone dust removal parameters.

16. The welding system according to claim 15, wherein: The welding system further includes a brush dust removal assembly in communication with the controller; The brush dust removal assembly is used to perform a brush dust removal process on the end surface of the electrode collector plate obtained after the battery electrode pieces are welded; The controller obtains an end face image of the electrode collector disc; performs end face contaminant detection on the end face of the electrode collector disc based on the end face image to obtain a degree of contamination of the end face of the electrode collector disc; determines brush dust removal parameters for the end face of the electrode collector disc based on the degree of contamination of the end face of the electrode collector disc; and controls the brush dust removal component to perform brush dust removal on the end face of the electrode collector disc according to the brush dust removal parameters.

17. The welding system according to any one of claims 13 to 16, characterized in that: The welding assembly includes a single-mode annular spot continuous fiber laser.

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