Laser welding equipment, laser welding method and device, computing equipment and medium

Abstract

The invention provides laser welding equipment, a laser welding method and device, computing equipment and a medium, and belongs to the technical field of welding. The laser welding equipment comprises a galvanometer assembly which is configured to project laser to a target welding point for laser welding; and the visual assembly comprises a visual sensor and a range finder. The visual sensor is configured to determine an offset value of the galvanometer assembly relative to the target welding point for offset calibration. The range finder is configured to determine the defocusing amount of the galvanometer assembly for defocusing compensation.

Description

Technical Field

[0001] The present application relates to the field of welding technology, and in particular, to a laser welding device, a laser welding method, a device, a computing device, and a medium. Background Art

[0002] Welding technologies such as laser welding are commonly used in industrial production processes. Common application scenarios of welding technologies include, for example, the production process of batteries. Battery cells are the basic components of a battery module. As a connector between battery cells, a tab connects multiple battery cells together to form a battery module. The tab reasonably distributes the current and voltage between battery cells, thereby ensuring the normal operation of the entire battery module. During the connection process, the pole columns of battery cells in the battery module need to be welded to the tab. High-quality welding can improve the performance and safety of the welded object (e.g., battery module) and extend its service life. Summary of the Invention

[0003] The present application aims to at least solve one of the technical problems existing in the background art. To this end, one object of the present application is to provide a laser welding device, a laser welding method, a laser welding device, a computing device, and a storage medium to alleviate, mitigate, or eliminate the problems in the related art.

[0004] An embodiment of the first aspect of the present application provides a laser welding device, including: a galvanometer assembly configured to project a laser beam onto a target welding point for laser welding; and a vision assembly including a vision sensor and a rangefinder. The vision sensor is configured to determine the offset value of the galvanometer assembly relative to the target welding point for offset calibration, and the rangefinder is configured to determine the defocus amount of the galvanometer assembly for defocus compensation.

[0005] In the technical solution of the embodiment of the present application, a vision assembly is provided in the laser welding device. The vision sensor and the rangefinder in the vision assembly can determine the offset value and the defocus amount of the galvanometer assembly to calibrate the galvanometer assembly, improving the welding accuracy and the welding quality.

[0006] In some embodiments, the vision sensor is configured to image a marking point on the welding object to determine the offset value of the galvanometer assembly. By setting a marking point on the welding object, the offset value of the galvanometer assembly can be determined using the welding object itself to be welded, simplifying the operation process and improving the welding efficiency.

[0007] In some embodiments, the rangefinder is configured to measure the distance to the target welding point to determine the defocus amount of the galvanometer assembly. By using the rangefinder, the measurement accuracy is improved, and the defocus amount determined according to the measurement result is also more accurate.

[0008] In some embodiments, the vision component further includes: a first mounting member on which the vision sensor and the rangefinder are mounted; and a light source mounted on the first mounting member, the light source being configured to provide supplementary lighting when the vision sensor forms an image. Mounting each part of the vision component on the first mounting member improves the integration of the vision component and facilitates installation. At the same time, by providing the light source, the imaging quality of the vision sensor can be improved, a more accurate offset value can be obtained, and the welding accuracy can be enhanced.

[0009] In some embodiments, the laser welding device further includes: a protective cover movably connected to the first mounting member and configured to move between the vision component and the target welding point when the galvanometer component performs laser welding to protect the vision component. By providing the protective cover, the vision component can be protected during welding, reducing the risk of damage to the vision component caused by splashed welding slag.

[0010] In some embodiments, the laser welding device further includes: a first actuator configured to drive the protective cover to move relative to the first mounting member between the vision component and the target welding point. The protective cover is arranged to be driven by the first actuator to move between the vision component and the target welding point during welding to protect the vision component, and to move away during measurement of the vision component to enable normal measurement, improving the convenience of operation.

[0011] In some embodiments, the laser welding device further includes: a galvanometer protection component located on the laser exit side of the galvanometer component, the galvanometer protection component being configured to provide a transparent isolation layer between the laser exit side of the galvanometer component and the target welding point to protect the galvanometer component. By providing the galvanometer protection component, the galvanometer component can be protected during welding, reducing the risk of damage to the galvanometer component caused by smoke and welding slag generated during the welding process.

[0012] In some embodiments, the galvanometer protection component includes: one or more air knives configured to provide one or more air curtains as the transparent isolation layer on the optical path of the laser projected by the galvanometer component, the one or more air curtains intersecting the optical path of the laser, and the plurality of air knives being arranged in sequence along the optical path of the laser. The air knives can generate high-speed airflows to form air curtains to protect the galvanometer component, preventing the smoke and welding slag generated during welding from damaging or contaminating the galvanometer component.

[0013] In some embodiments, the laser welding device further includes: an optical fiber protection component connected to the galvanometer component and configured to protect the optical fiber that transmits the laser to the galvanometer component. The laser used for welding is transmitted to the galvanometer component through the optical fiber. By providing the optical fiber protection component, the risk of damage to the optical fiber during use is reduced, and the service life of the optical fiber is extended.

[0014] In some embodiments, the optical fiber protection assembly includes: an optical fiber protection frame; an optical fiber guide, at least a part of which is nested inside the optical fiber protection frame and is used to guide the optical fiber to be connected to the galvanometer assembly, and the optical fiber guide is configured to be rotatable relative to the optical fiber protection frame; and at least one limiter configured to limit the rotation range of the optical fiber guide relative to the optical fiber protection frame. By limiting the rotation range of the optical fiber guide, the stress on the optical fiber during use is reduced, and the service life of the optical fiber is prolonged.

[0015] In some embodiments, any one of the at least one limiter includes: a first sensing component connected to the optical fiber guide to rotate synchronously with the optical fiber guide; and a second sensing component connected to the optical fiber protection frame, and the second sensing component and the first sensing component cooperate to detect the extreme positions of the optical fiber guide relative to the optical fiber protection frame for limiting the position. Sensing components are respectively arranged on the optical fiber protection frame and the optical fiber guide to determine the extreme positions of the optical fiber guide, so as to realize the limitation of the rotation range of the optical fiber guide.

[0016] In some embodiments, the optical fiber protection assembly further includes: a second mounting member connected to the optical fiber protection frame and configured to mount the optical fiber protection assembly on the galvanometer assembly; and an end cap located at one end of the optical fiber guide opposite to the second mounting member and configured to pass through the optical fiber and be fixed to the optical fiber guide. Mounting the optical fiber protection assembly on the galvanometer assembly reduces the displacement of the optical fiber relative to the galvanometer assembly and improves the protection effect on the optical fiber.

[0017] In some embodiments, the laser welding device further includes: a second actuator connected to the galvanometer assembly and the vision assembly and configured to move the galvanometer assembly and the vision assembly to the working position for laser welding. Using the second actuator to move the galvanometer assembly and the vision assembly improves the automation degree of the laser welding process and improves the welding efficiency and welding precision.

[0018] An embodiment of the second aspect of the present application provides a laser welding method applied to the laser welding device in the above embodiment, including: controlling the offset calibration of the galvanometer assembly based on the offset value of the galvanometer assembly; controlling the defocus compensation of the galvanometer assembly based on the defocus amount of the galvanometer assembly; and controlling the galvanometer assembly to project laser light to a target welding point for laser welding.

[0019] An embodiment of the third aspect of the present application provides a laser welding device, including: a first module configured to control the offset calibration of the galvanometer assembly based on the offset value of the galvanometer assembly; a second module configured to control the defocus compensation of the galvanometer assembly based on the defocus amount of the galvanometer assembly; and a third module configured to control the galvanometer assembly to project laser light to a target welding point for laser welding.

[0020] An embodiment of the fourth aspect of the present application provides a computing device, which includes at least one processor; and at least one memory communicatively connected to the at least one processor. The at least one memory stores instructions that, when executed alone or jointly by the at least one processor, cause the computing device to execute the method in the above embodiments.

[0021] An embodiment of the fifth aspect of the present application provides a non-transitory computer-readable storage medium, on which instructions are stored that, when executed alone or jointly by one or more processors of a computing device, cause the computing device to execute the method in the above embodiments.

[0022] An embodiment of the sixth aspect of the present application provides a computer program product, including instructions that, when executed alone or jointly by one or more processors of a computing device, cause the computing device to execute the method in the above embodiments.

[0023] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented in accordance with the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. Description of the Drawings

[0024] In the drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings denote the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in accordance with the present application and should not be regarded as limiting the scope of the present application.

[0025] Figure 1A It is a schematic structural diagram of a laser welding device according to some embodiments of the present application;

[0026] Figure 1B It is a bottom view structural diagram of a laser welding device according to some embodiments of the present application;

[0027] Figure 1C It is a side view structural diagram of a laser welding device according to some embodiments of the present application;

[0028] Figure 2 It is a schematic structural diagram of a vision component according to some embodiments of the present application;

[0029] Figure 3 It is a schematic structural diagram of a galvanometer protection component according to some embodiments of the present application;

[0030] Figure 4 It is a schematic structural diagram of an optical fiber protection component according to some embodiments of the present application;

[0031] Figure 5Schematic structural diagram of the second actuator according to some embodiments of the present application;

[0032] Figure 6 Schematic overall structural diagram of the laser welding device according to some embodiments of the present application;

[0033] Figure 7 Schematic flow diagram of the laser welding method according to some embodiments of the present application;

[0034] Figure 8 Exemplary block diagram of the laser welding device according to some embodiments of the present application;

[0035] Figure 9 Block diagram of an exemplary computing device that can be applied to exemplary embodiments.

[0036] Explanation of reference numerals:

[0037] Laser welding device 100;

[0038] Galvo component 110, vision component 120, galvo protection component 130, optical fiber protection component 140, second actuator 150;

[0039] Galvo 111, galvo component mounting plate 112, galvo mounting plate 113;

[0040] Vision sensor 121, rangefinder 122, first mounting member 123, light source 124, protective cover 125, first actuator 126;

[0041] Air knife 131, air knife fixing bracket 132, air inlet 133;

[0042] Optical fiber protection frame 141, optical fiber guide 142, limiter 143, first sensing component 1431, second sensing component 1432, second mounting member 144, end cap 145, washer 146;

[0043] Six-axis robot 151, cable package 152, mounting base 153. Detailed description of the specific implementation

[0044] Hereinafter, embodiments of the technical solutions 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 solutions of the present application, and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only 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 description of the drawings are intended to cover non-exclusive inclusion.

[0046] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order, or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "a plurality" is more than two, unless otherwise specifically and clearly defined.

[0047] Reference to "an embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0048] In the description of the embodiments of this application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0049] In the description of the embodiments of this application, the term "a plurality" 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).

[0050] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of this application and simplifying the description, and does not indicate or imply that the indicated device or element 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 this application.

[0051] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0052] Welding techniques such as laser welding are commonly used techniques in industrial production processes. Common application scenarios of welding techniques include, for example, the production process of batteries. Battery cells are the basic components of battery modules. As a connector between battery cells, the tab connects multiple battery cells together to form a battery module. The tab reasonably distributes the current and voltage between battery cells, thereby ensuring that the entire battery module can work properly.

[0053] During the connection process, it is necessary to weld the pole posts of the battery cells in the battery module to the tab. High-quality welding can improve the performance and safety of the welded object (for example, the battery module) and extend its service life. However, the existing welding methods cannot well guarantee the welding accuracy, and the phenomenon of welding point deviation may occur during the welding process. In severe cases, it may even cause the welded object to be welded through and cause a fire.

[0054] Based on the above considerations, a laser welding device is designed to calibrate the galvanometer assembly used for welding through a vision component, improve the welding accuracy, and improve the welding quality.

[0055] The laser welding device disclosed in the embodiments of the present application can be but is not limited to being used in the production process of power batteries for vehicles, ships, aircraft, etc. Using the laser welding device disclosed in the present application is beneficial to improving the welding accuracy and improving the welding quality.

[0056] Figure 1A 、 1B FIG. 1C shows schematic structural diagrams of the laser welding device according to some embodiments of the present application from different perspectives. As Figures 1A - 1C shown, the embodiments of the present application provide a laser welding device 100. The laser welding device 100 includes a galvanometer assembly 110 and a vision component 120.

[0057] The galvanometer assembly 110 is configured to project laser light onto a target welding point for laser welding.

[0058] The vision component 120 includes a vision sensor 121 and a rangefinder 122. The vision sensor 121 is configured to determine the offset value of the galvanometer component 110 relative to the target welding point for offset calibration. The rangefinder 122 is configured to determine the defocus amount of the galvanometer component 110 for defocus compensation.

[0059] As Figures 1A - 1C shown, the galvanometer component 110 includes a galvanometer 111. In some embodiments, the galvanometer component 110 may further include a galvanometer component mounting plate 112 and a galvanometer mounting plate 113. The galvanometer 111 may be mounted on the galvanometer mounting plate 113. Through the galvanometer component mounting plate 112, the galvanometer component 110 can be integrally mounted to a suitable position to fix the galvanometer component 110. When welding the target welding point, the galvanometer 111 focuses the high-power laser and projects it onto the target welding point for laser welding. It should be understood that Figures 1A - 1C the galvanometer component 110 shown in

[0060] As Figure 2 shown, in some embodiments, the vision sensor 121 may include an imaging device such as a 2D camera. The vision sensor 121 is configured to determine the offset value of the galvanometer component 110 relative to the target welding point.

[0061] In some embodiments, the rangefinder 122 may include a ranging device such as a laser rangefinder or an ultrasonic rangefinder. The rangefinder 122 is configured to determine the defocus amount of the galvanometer component 110.

[0062] A vision component is provided in the laser welding device. The vision sensor and the rangefinder in the vision component can determine the offset value and the defocus amount of the galvanometer component to calibrate the galvanometer component. Thereby, the welding accuracy can be improved and the welding quality can be improved.

[0063] According to some embodiments of the present application, the vision sensor 121 is configured to image the marking points on the welding object to determine the offset value of the galvanometer component 110.

[0064] In some embodiments, marking points may be provided on the welding object to be welded. The marking points may be structures inherent in the welding object, such as edge points or special shapes, or markings artificially added to the welding object. In addition, the target welding point may also be used as a marking point. In some embodiments, the welding object may include a battery module, and the target welding point includes the welding point between the pole post and the tab in the battery module.

[0065] The vision sensor 121 images the marking points to determine the accurate position of the welding object to be welded, that is, to determine the accurate position of the target welding point, so as to determine the offset value of the galvanometer component 110 relative to the target welding point.

[0066] To further improve the calibration accuracy, the number of marking points can be increased, and multiple marking points are imaged to determine the offset value of the galvanometer assembly 110. For example, the weighted average of the offset values corresponding to the multiple marking points can be used as the offset value of the galvanometer assembly 110. In one example, two marking points are provided on the battery module, and the vision sensor 121 images the two marking points to obtain the offset value corresponding to each marking point, and the average value thereof is taken as the offset value of the galvanometer assembly 110.

[0067] By providing marking points on the welding object, the offset value of the galvanometer assembly can be determined using the welding object to be welded itself, which can simplify the operation process and improve the welding efficiency.

[0068] According to some embodiments of the present application, the rangefinder 122 is configured to measure the distance to the target welding point to determine the defocus amount of the galvanometer assembly 110.

[0069] During the laser welding process, since the power density at the center of the light spot at the laser focus is relatively high, it may cause damage to the welding point. Therefore, it is necessary to determine an appropriate defocus amount to obtain an appropriate power density.

[0070] The rangefinder 122 can measure the distance to the target welding point to determine the defocus amount of the galvanometer assembly 110, so that the laser power density at the target welding point meets the welding requirements.

[0071] By using the rangefinder, the measurement accuracy is improved, and the defocus amount determined according to the measurement result is also more accurate.

[0072] According to some embodiments of the present application, the vision assembly 120 further includes a first mounting member 123 and a light source 124.

[0073] The vision sensor 121 and the rangefinder 122 are mounted on the first mounting member 123.

[0074] The light source 124 is mounted on the first mounting member 123 and is configured to provide supplementary light when the vision sensor 121 images.

[0075] As Figure 2 shown, a light source 124 is also provided in the vision assembly 120. Since laser welding is usually carried out indoors, in the case of poor light, the imaging quality of the vision sensor 121 will also be reduced, which may cause a large calibration error. At this time, the light source 124 can be used for supplementary light to improve the imaging quality of the vision sensor 121.

[0076] The vision sensor 121, the rangefinder 122, and the light source 124 can all be fixed on the first mounting member 123 to improve the integration of the vision component 120. The structure and material of the first mounting member 123 can be set according to the usage scenario. For example, a plate-like structure, a block-like structure, etc. can be used, and the present disclosure does not limit this.

[0077] In some embodiments, the vision component 120 can be mounted at a desired position through the first mounting member 123. For example, the first mounting member 123 equipped with the vision sensor 121, the rangefinder 122, and the light source 124 can be fixed on the galvanometer component 110 to achieve synchronous movement of the galvanometer component 110 and the vision component 120.

[0078] It should be understood that Figure 2 the vision component 120 shown in

[0079] is merely illustrative, and it is not required that the vision component 120 includes all the elements shown. Mounting each part of the vision component on the first mounting member improves the integration of the vision component and facilitates installation. At the same time, by setting the light source, the imaging quality of the vision sensor can be improved, a more accurate offset value can be obtained, and the welding accuracy can be enhanced.

[0080] According to some embodiments of the present application, the laser welding device 100 further includes a protective cover 125.

[0081] The protective cover 125 is movably connected to the first mounting member 123 and is configured to move between the vision component 120 and the target welding point when the galvanometer component 110 performs laser welding to protect the vision component 120.

[0082] As Figure 2 shown, the protective cover 125 is movably connected to the first mounting member 123 and can move between the vision component 120 and the target welding point.

[0083] Since impurities such as welding slag will be generated during the welding process, the splashing of impurities may damage the vision component 120. During laser welding, the protective cover 125 moves between the vision component 120 and the target welding point, and the splashed welding slag and other impurities can be blocked by the protective cover 125, thereby protecting the vision component 120.

[0084] When the vision sensor 121 images and / or the rangefinder 122 measures the distance, the protective cover 125 can be moved to one side without blocking the vision component 120 so that the vision component 120 can be used normally.

[0085] The connection method between the protective cover 125 and the first mounting member 123 can be selected according to the usage scenario. For example, connection methods such as guide rails and rotating shafts can be used. The protective cover 125 can be translated between the vision component 120 and the target welding point, or rotated between the vision component 120 and the target welding point. The present disclosure does not limit this.

[0086] By providing the protective cover, the vision component can be protected during welding, reducing the risk of damage to the vision component caused by welding slag splashing out.

[0087] According to some embodiments of the present application, the laser welding device 100 further includes a first actuator 126.

[0088] The first actuator 126 is configured to drive the protective cover 125 to move relative to the first mounting member 123 between the vision component 120 and the target welding point.

[0089] As Figure 2 shown, the first actuator 126 can drive the protective cover 125 to move. The first actuator 126 can be selected according to the usage scenario. For example, a cylinder device, a gear transmission device, an electromagnetic transmission device, etc. can be used. The present disclosure does not limit this.

[0090] In Figure 2 the example shown, the first actuator 126 uses a cylinder device.

[0091] By driving the protective cover to move through the first actuator, the protective cover is moved between the vision component and the target welding point during welding to protect the vision component, and the protective cover is moved away during the measurement of the vision component to enable normal measurement, improving the operation convenience.

[0092] According to some embodiments of the present application, the laser welding device 100 further includes a galvanometer protection component 130.

[0093] The galvanometer protection component 130 is located on the laser exit side of the galvanometer component 110 and is configured to provide a transparent isolation layer between the laser exit side of the galvanometer component 110 and the target welding point to protect the galvanometer component 110.

[0094] During the laser welding process, due to the impact of the high-energy laser beam on the welding point material, impurities such as smoke or welding slag will be generated when the welding material melts, and splashing may occur. These splashed impurities may damage the galvanometer, or may adhere to the galvanometer, affecting the output of the laser beam and deteriorating the welding quality.

[0095] As Figure 1CAs shown, a galvanometer protection assembly 130 is provided on the laser exit side of the galvanometer assembly 110. The galvanometer protection assembly 130 can provide a transparent isolation layer between the laser exit side of the galvanometer assembly 110 and the target welding point. While the laser can be normally projected onto the target welding point, it can block the flying impurities during the welding process and reduce their impact on the galvanometer assembly 110. The transparent isolation layer can be composed of any suitable material, including but not limited to, for example, high-speed air flow, transparent resin, etc.

[0096] By providing the galvanometer protection assembly, the galvanometer assembly can be protected during welding, reducing the risk of damage to the galvanometer assembly caused by the smoke and welding slag generated during the welding process.

[0097] According to some embodiments of the present application, the galvanometer protection assembly 130 includes one or more air knives 131.

[0098] One or more air knives 131 are configured to provide one or more air curtains corresponding to the light path of the laser projected by the galvanometer assembly 110 as a transparent isolation layer. One or more air curtains intersect with the light path of the laser. Multiple air knives are arranged in sequence along the light path of the laser.

[0099] As Figure 3 shown, the number of air knives 131 in the galvanometer protection assembly 130 can be designed according to the usage scenario. To obtain a better protection effect, the number of air knives can be increased.

[0100] In some embodiments, air enters the galvanometer protection assembly 130 from the air inlet 133 and is blown out at high speed by the air knives 131. In one example, the wind speed can be 50 m / s. Since the high-speed air flow can form an air curtain, blocking impurities such as smoke or welding slag generated during the welding process and making it difficult for them to approach the galvanometer assembly 110, thereby achieving the protection of the galvanometer assembly 110.

[0101] The outlet direction of the air knife 131 can intersect with the light path of the laser projected by the galvanometer assembly 110 to provide an air curtain on the laser light path. To obtain a better protection effect, the outlet direction of the air knife can be set to be perpendicular to the laser light path downward to block impurities such as welding slag from splashing upward onto the galvanometer assembly 110.

[0102] In the case where the galvanometer protection assembly 130 includes multiple air knives 131, the multiple air knives 131 can be arranged in sequence along the laser light path to provide multiple air curtains on the laser light path and improve the protection effect. The outlet directions of the multiple air knives 131 can be the same to provide multiple parallel air curtains to each other, or there can be a certain angular difference between them to achieve a better blocking effect on impurities splashing in multiple directions.

[0103] In some embodiments, the galvanometer protection assembly 130 further includes an air knife fixing bracket 132. The air knife 131 and the air inlet 133 can both be mounted on the air knife fixing bracket 132. The air knife fixing bracket 132 can be mounted on the galvanometer assembly 110 to fix the galvanometer protection assembly 130 and the galvanometer assembly 110 as a whole for convenient use.

[0104] It should be understood that Figure 3 the galvanometer protection assembly 130 shown in

[0105] In Figure 3 the illustrated example, the galvanometer protection assembly 130 includes two air knives 131. The two air knives 131 are mounted in parallel in the direction of the laser light path, and the air outlet directions are the same, both being perpendicular to the laser light path and downward.

[0106] The air knife can generate a high-speed air flow to form an air curtain to protect the galvanometer assembly, preventing the smoke and welding slag generated during welding from damaging or contaminating the galvanometer assembly.

[0107] According to some embodiments of the present application, the laser welding device 100 further includes an optical fiber protection assembly 140.

[0108] The optical fiber protection assembly 140 is connected to the galvanometer assembly 110 and is configured to protect an optical fiber (not shown) that transmits laser to the galvanometer assembly 110.

[0109] The high-power laser generated by the laser is transmitted to the galvanometer assembly 110 through the optical fiber. Since the galvanometer assembly 110 will move according to the position of the target welding point during the welding process, during the movement, the optical fiber may be distorted, stretched and other deformed, and there is a risk of damage. Therefore, as Figure 1A shown, the optical fiber protection assembly 140 is used to protect the optical fiber.

[0110] The laser used for welding is transmitted to the galvanometer assembly through the optical fiber. By setting the optical fiber protection assembly, the risk of damage to the optical fiber during use is reduced, and the service life of the optical fiber is extended.

[0111] According to some embodiments of the present application, the optical fiber protection assembly 140 includes an optical fiber protection frame 141, an optical fiber guide 142, and at least one limiter 143.

[0112] At least a part of the optical fiber guide 142 is nested inside the optical fiber protection frame 141 and is used to guide the optical fiber to be connected to the galvanometer assembly 110. The optical fiber guide 142 is configured to be able to rotate relative to the optical fiber protection frame 141.

[0113] At least one limiter 143 is configured to limit the rotation range of the optical fiber guide 142 relative to the optical fiber protection frame 141.

[0114] As Figure 4 As shown, the optical fiber protection component 140 includes an optical fiber protection frame 141, an optical fiber guide 142, and a limiter 143. The optical fiber passes through the optical fiber guide 142 and the optical fiber protection frame 143 and is connected to the galvanometer assembly 110.

[0115] The optical fiber protection frame 141 is fixedly arranged relative to the galvanometer assembly 110. The optical fiber guide 142 can rotate relative to the optical fiber protection frame 141. In some embodiments, a washer 146 is provided between the optical fiber and the optical fiber guide 142 to limit the optical fiber inside the optical fiber guide 142, so that the optical fiber guide 142 and the optical fiber can rotate synchronously.

[0116] The limiter 143 can limit the rotation range of the optical fiber guide 142 relative to the optical fiber protection frame 141, that is, limit the rotation range of the optical fiber, so that the optical fiber will not be severely distorted and damaged. The number of limiters 143 can be set according to the usage scenario. For example, a single limiter 143 can be used for limiting, or multiple limiters 143 can be arranged at a certain distance to achieve a better limiting effect.

[0117] The limiter 143 can use different limiting methods, such as physical limiting, electromagnetic limiting, inductive limiting, etc. In the case of using the physical limiting method, limiting structures can be respectively provided on the optical fiber protection frame 141 and the optical fiber guide 142. When the optical fiber guide 142 rotates to the limit position, the two limiting structures contact each other and cannot continue to rotate to achieve the limiting function. In the case of using the electromagnetic limiting method, magnetic components can be respectively provided on the optical fiber protection frame 141 and the optical fiber guide 142 to achieve the limiting function through the magnetic field. In the case of using the inductive limiting method, sensing components can be respectively provided on the optical fiber protection frame 141 and the optical fiber guide 142. The rotation of the optical fiber guide 142 is controlled by detecting the movement and / or position of the sensing components to achieve the limiting function. The limiting method of the limiter 143 can be selected according to the usage scenario.

[0118] In some embodiments, an elastic component, such as a spring, can also be provided between the optical fiber protection frame 141 and the optical fiber guide 142 to buffer the force when the optical fiber is stretched or compressed.

[0119] It should be understood that Figure 4 the optical fiber protection component 140 shown in [[ ]] is only illustrative, and it is not required that the optical fiber protection component 140 includes all the elements shown.

[0120] By restricting the rotation range of the optical fiber guide, the stress on the optical fiber during use is reduced, and the service life of the optical fiber is extended.

[0121] According to some embodiments of the present application, any one of at least one limiter 143 includes a first sensing component 1431 and a second sensing component 1432.

[0122] The first sensing component 1431 is connected to the optical fiber guide 142 to rotate synchronously with the optical fiber guide 142.

[0123] The second sensing component 1432 is connected to the optical fiber protection frame 141. The second sensing component 1432 and the first sensing component 1431 cooperate to detect the limit position of the optical fiber guide 142 relative to the optical fiber protection frame 141 for limiting.

[0124] As Figure 4 shown, a first sensing component 1431 is provided on the optical fiber guide 142, and a second sensing component 1432 is provided on the optical fiber protection frame 141. The second sensing component 1432 can be arranged at a position on the optical fiber protection frame 141 corresponding to the limit position where the optical fiber guide shaft 142 is allowed to rotate. When the first sensing component 1431 rotates into the sensing range of the second sensing component 1432, the second sensing component 1432 can detect the position of the first sensing component 1431, generate a detection signal indicating that the optical fiber guide 142 rotates to the limit position, for limiting it.

[0125] In some embodiments, two second sensing components 1432 can be respectively arranged in opposite directions along the diameter of the optical fiber protection frame 141. Correspondingly, two first sensing components 1431 are respectively arranged in opposite directions along the diameter of the optical fiber guide shaft 142.

[0126] In the example, the second sensing component 1432 can use an optoelectronic switch, and the first sensing component 1431 is a corresponding induction piece.

[0127] Sensing components are respectively arranged on the optical fiber protection frame and the optical fiber guide to determine the limit position of the optical fiber guide, and the rotation range of the optical fiber guide is restricted.

[0128] According to some embodiments of the present application, the optical fiber protection component 140 further includes a second mounting member 144 and an end cap 145.

[0129] The second mounting member 144 is connected to the optical fiber protection frame 141 and is configured to mount the optical fiber protection component 140 on the galvanometer component 110.

[0130] The end cap 145 is located at one end of the optical fiber guide 142 opposite to the second mounting member 144 and is configured to pass through the optical fiber and be fixed to the optical fiber guide 142.

[0131] As shown Figure 4 in FIG. 1, the optical fiber protection component 140 is connected to the galvanometer component 110 through the second mounting member 144 to fix the optical fiber protection component 140 and the galvanometer component 110 as a whole.

[0132] An end cap 145 is provided on the optical fiber guide 142, and the end cap 145 passes through the optical fiber. In some embodiments, the end cap 145 also passes through a gasket 146 wrapped around the outside of the optical fiber. Fixing the end cap 145 on the optical fiber guide 142 can reduce dust and other impurities entering the optical fiber guide 142.

[0133] Mounting the optical fiber protection component on the galvanometer component reduces the displacement of the optical fiber relative to the galvanometer component and improves the protection effect on the optical fiber.

[0134] According to some embodiments of the present application, the laser welding device 100 further includes a second actuator 150.

[0135] The second actuator 150 is connected to the galvanometer component 110 and the vision component 120, and is configured to move the galvanometer component 110 and the vision component 120 to the working position for laser welding.

[0136] As shown Figure 6 in FIG. 2, the second actuator 150 can drive the galvanometer component 110 and the vision component 120 to move. The second actuator 150 can include various devices capable of performing a moving operation, such as a multi-axis moving device and the like.

[0137] In Figure 5 the example shown in FIG. 3, the second actuator 150 can be a six-axis moving device, including a six-axis robot 151, a cable package 152, and a mounting base 153. The six-axis robot 151 is fixed through the mounting base 153 and can drive the galvanometer component 110 and the vision component 120 to move in all directions.

[0138] It should be understood Figure 5 that the second actuator 150 shown in FIG. 3 is illustrative only, and it is not required that the second actuator 150 includes all the elements shown.

[0139] Using the second actuator to move the galvanometer component and the vision component improves the automation degree of the laser welding process, and improves the welding efficiency and welding accuracy.

[0140] Please refer to Figure 7 FIG. 4. An embodiment of the present application provides a laser welding method 700. The laser welding method 700 is applied to the laser welding device 100 described above. The laser welding method 700 includes steps 710 to 730.

[0141] Step 710: Based on the offset value of the galvanometer assembly 110, control the offset calibration of the galvanometer assembly 110.

[0142] Step 720: Based on the defocus amount of the galvanometer assembly 110, control the defocus compensation of the galvanometer assembly 110.

[0143] Step 730: Control the galvanometer assembly 110 to project laser towards the target welding point for laser welding.

[0144] The vision sensor 121 images the marking points to determine the accurate position of the welding object to be welded, that is, to determine the accurate position of the target welding point, so as to determine the offset value of the galvanometer assembly 110 relative to the target welding point. According to the offset value, the offset calibration of the galvanometer assembly can be carried out.

[0145] In order to further improve the calibration accuracy, the number of marking points can be increased, and multiple marking points are imaged to determine the offset value of the galvanometer assembly 110. For example, the weighted average of the offset values corresponding to the multiple marking points can be used as the offset value of the galvanometer assembly 110. In one example, 2 marking points are provided on the battery module, and the vision sensor 121 images the 2 marking points to obtain the offset value corresponding to each marking point, and the average value thereof is taken as the offset value of the galvanometer assembly 110. According to the offset value of the galvanometer assembly 110, the calibration value for the offset value of the galvanometer assembly 110 can be determined.

[0146] The rangefinder 122 can measure the distance to the target welding point to determine the defocus amount of the galvanometer assembly 110, so that the laser power density at the target welding point meets the welding requirements. According to the defocus amount, the defocus compensation of the galvanometer assembly can be carried out.

[0147] In some embodiments, the target welding point includes multiple welding points. For example, when the welding object is a battery module, the target welding point is the welding point between the pole post and the tab in the battery module. At this time, the weighted average of the defocus amounts corresponding to the multiple welding points can be used as the defocus amount of the galvanometer assembly 110. In one example, the rangefinder 122 can measure the distance to the tabs corresponding to the 4 pole posts on both the head and tail sides of the battery module to obtain the defocus amount corresponding to each welding point, and the average value thereof is taken as the defocus amount of the galvanometer assembly 110. According to the defocus amount of the galvanometer assembly 110, the defocus amount compensation value of the galvanometer assembly 110 in the height direction can be calculated.

[0148] According to the calibration value and the defocus amount compensation value, the galvanometer assembly 110 can be moved to the working position through, for example Figure 6 the second actuator 150 to complete the offset calibration and defocus compensation. Then, the galvanometer assembly 110 projects laser towards the target welding point for laser welding.

[0149] An embodiment of the present application provides a laser welding device 800. Please refer to Figure 8 , the laser welding device 800 includes a first module 810, a second module 820, and a third module 830.

[0150] The first module 810 is configured to control the offset calibration of the galvanometer assembly 110 based on the offset value of the galvanometer assembly 110.

[0151] The second module 820 is configured to control the defocus compensation of the galvanometer assembly 110 based on the defocus amount of the galvanometer assembly 110.

[0152] The third module 830 is configured to control the galvanometer assembly 110 to project laser light onto a target welding point for laser welding.

[0153] The first module 810, the second module 820, and the third module 830 in the laser welding device 800 may respectively correspond to steps 710 to 730 in the laser welding method 700 as shown in Figure 7 . For the sake of brevity, they will not be elaborated here. It should be understood that corresponding to the embodiments of the laser welding method 700, the embodiments of the laser welding device 800 may further include more modules.

[0154] It should be noted that the functions of the various modules discussed herein can be divided into multiple modules, and / or at least some of the functions of multiple modules can be combined into a single module. The specific module that performs an action includes the specific module itself performing the action, or alternatively the specific module calling or otherwise accessing another component or module that performs the action (or performs the action in combination with the specific module). Therefore, the specific module that performs an action may include the specific module itself that performs the action and / or another module that the specific module calls or otherwise accesses and performs the action.

[0155] It should also be understood that various techniques can be described herein in the general context of software-hardware elements or program modules. Regarding the above Figure 8The described modules can be implemented in hardware or in hardware in combination with software and / or firmware. For example, these modules can be implemented as computer program code / instructions configured to be executed in one or more processors and stored in a computer-readable storage medium. Alternatively, these modules can be implemented as hardware logic / circuits. The hardware logic / circuits can include an integrated circuit chip (which includes one or more components of a processor (e.g., a Central Processing Unit (CPU), a microcontroller, a microprocessor, a Digital Signal Processor (DSP), etc.), a memory, one or more communication interfaces, and / or other circuits), and can optionally execute the received program code and / or include embedded firmware to perform functions.

[0156] Embodiments of the present application provide a computing device. The computing device includes: at least one processor; and at least one memory communicatively connected to the at least one processor, the at least one memory storing instructions that, when executed by the at least one processor alone or in combination, cause the computing device to execute the laser welding method 700. The computing device is, for example, Figure 9 the computing device 900 shown. Figure 9 FIG. shows an example configuration of a computing device 900 that can be used to implement the methods described herein. For example, the above-described laser welding device 800 can be implemented in whole or at least in part by the computing device 900 or a similar device or system.

[0157] The computing device 900 can include at least one processor 905, a memory 907, (multiple) communication interfaces 902, a display device 901, other input / output (I / O) devices 903, and one or more mass storage devices 906 that can communicate with each other, such as via a system bus 904 or other suitable connections. Instructions are stored on the memory 907 that, when executed by the processor 905, cause the processor 905 to execute the method as in the above embodiments.

[0158] The computing device 900 can be various different types of devices. Examples of the computing device 900 include but are not limited to: desktop computers, server computers, laptop or netbook computers, mobile devices (e.g., tablets, cellular or other wireless phones (e.g., smartphones), notepad computers, mobile stations), wearable devices (e.g., glasses, watches), entertainment devices (e.g., entertainment appliances, set-top boxes communicatively coupled to a display device, gaming consoles), televisions or other display devices, automotive computers, and the like.

[0159] The processor 905 can be a single processing unit or multiple processing units, and all processing units can include a single or multiple computing units or multiple cores. The processor 905 can be implemented as one or more microprocessors, microcomputers, microcontrollers, digital signal processors, central processing units, state machines, logic circuits, and / or any device that manipulates signals based on operation instructions. Among other capabilities, the processor 905 can be configured to obtain and execute computer-readable instructions stored in the memory 907, the mass storage device 906, or other computer-readable media, such as the program code of the operating system 908, the program code of the application 909, the program code of other programs 910, and so on.

[0160] The memory 907 and the mass storage device 906 are examples of computer-readable storage media for storing instructions that are executed by the processor 905 to implement the various functions described above. For example, the memory 907 generally can include both volatile and non-volatile memories (e.g., RAM, ROM, etc.). In addition, the mass storage device 906 generally can include a hard disk drive, a solid state drive, removable media, including external and removable drives, memory cards, flash memory, floppy disks, optical discs (e.g., CD, DVD), storage arrays, network-attached storage, storage area networks, and so on. The memory 907 and the mass storage device 906 can both be collectively referred to as memory or computer-readable storage media herein, and can be non-transitory media capable of storing computer-readable, processor-executable program instructions as computer program code that can be executed by the processor 905 as a specific machine configured to implement the operations and functions described in the examples herein.

[0161] Multiple programs can be stored on the mass storage device 906. These programs include the operating system 908, one or more applications 909, other programs 910, and program data 911, and they can be loaded into the memory 907 for execution. Examples of such application programs or program modules can include, for example, computer program logic (e.g., computer program code or instructions) for implementing the following components / functions: the laser welding device 800 (including the first module 810, the second module 820, and the third module 830), the laser welding method 700 (including any suitable steps of the laser welding method 700), and / or additional embodiments described herein.

[0162] Although illustrated as being stored in the memory 907 of the computing device 900 in Figure 9 , the operating system 908, the application 909, other programs 910, and program data 911, or portions thereof, can be implemented using any form of computer-readable media accessible by the computing device 900.

[0163] One or more communication interfaces 902 are used to exchange data with other devices, such as via a network, a direct connection, etc. Such communication interfaces can be one or more of the following: any type of network interface (e.g., network interface card (NIC)), wired or wireless (such as IEEE 802.11 wireless local area network (WLAN)) wireless interface, Worldwide Interoperability for Microwave Access (Wi-MAX) interface, Ethernet interface, Universal Serial Bus (USB) interface, cellular network interface, BluetoothTM interface, Near Field Communication (NFC) interface, etc. The communication interface 902 can facilitate communication within a variety of network and protocol types, including wired networks (e.g., LAN, cable, etc.) and wireless networks (e.g., WLAN, cellular, satellite, etc.), the Internet, etc. The communication interface 902 can also provide communication with external storage devices (not shown) such as in storage arrays, network-attached storage, storage area networks, etc.

[0164] In some examples, a display device 901 such as a monitor can be included for displaying information and images to a user. Other I / O devices 903 can be devices that receive various inputs from a user and provide various outputs to the user, and can include touch input devices, gesture input devices, cameras, keyboards, remote controls, mice, printers, audio input / output devices, etc.

[0165] The techniques described herein can be supported by these various configurations of the computing device 900 and are not limited to the specific examples of the techniques described herein. For example, the functionality can also be implemented in whole or in part on the "cloud" using a distributed system. The cloud includes and / or represents a platform for resources. The platform abstracts the underlying functionality of the hardware (e.g., servers) and software resources of the cloud. Resources can include applications and / or data that can be used when performing computing processing on servers remote from the computing device 900. Resources can also include services provided via the Internet and / or via a subscriber network such as a cellular or Wi-Fi network. The platform can abstract the resources and functionality to connect the computing device 900 with other computing devices. Thus, the implementation of the functionality described herein can be distributed throughout the cloud. For example, the functionality can be implemented partially on the computing device 900 and partially via a platform that abstracts the functionality of the cloud.

[0166] Embodiments of the present application also provide a non-transitory computer-readable storage medium having instructions stored thereon that, when executed by a processor, cause the processor to execute the method in any of the above embodiments.

[0167] A computer-readable storage medium includes volatile and non-volatile, removable and non-removable media implemented by any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. The computer-readable storage medium includes, but is not limited to, RAM, ROM, EEPROM, flash memory, or other memory technologies, CD-ROM, digital versatile disk (DVD), or other optical storage devices, magnetic cartridges, magnetic tapes, magnetic disk storage devices, or any other non-transmission medium that can be used to store information for access by a computing device.

[0168] An embodiment of the present application also provides a computer program product, including instructions that, when executed by a processor, cause the processor to execute the method in any of the above embodiments.

[0169] A specific embodiment of the present application is described below. It should be understood that this specific embodiment is described only for the purpose of illustration and should not be construed as a limitation of the present application.

[0170] As Figure 6 shown, the laser welding device 100 includes a galvanometer assembly 110, a vision assembly 120, a galvanometer protection assembly 130, an optical fiber protection assembly 140, and a second actuator 150. As Figure 1A shown, the vision assembly 120, the galvanometer protection assembly 130, and the optical fiber protection assembly 140 are mounted on the galvanometer assembly 110, fixed integrally with the galvanometer assembly 110, and connected to the second actuator 150 through a galvanometer assembly mounting plate 112.

[0171] The laser emits high-energy laser light that is transmitted through an optical fiber to the galvanometer assembly 110, and the galvanometer assembly 110 projects the laser light onto a target welding point between the pole post and the tab in the battery module for welding. The battery module can be a cylindrical module. At this time, the laser light path projected by the galvanometer assembly 110 is along the horizontal direction.

[0172] There are 2 marking points provided on the battery module. As Figure 2 shown, the vision sensor 121 in the vision assembly 120 images the 2 marking points on the battery module, so as to calculate the offset value of the galvanometer assembly 110 relative to the target welding point. During imaging, the light source 124 provides supplementary light. At the same time, the rangefinder 122 in the vision assembly 120 measures the distance to the target welding points corresponding to the 4 pole posts at the head and tail of the battery module, so as to calculate the defocus amount of the galvanometer assembly 110 and determine the compensation value for defocus compensation.

[0173] The vision sensor 121, the rangefinder 122, and the light source 124 are all mounted on the first mounting member 123. The first mounting member 123 is connected to the galvanometer assembly 110. A first actuator 126 is further provided on the first mounting member 123, which can drive the protective cover 125 to move. During the laser welding process, the protective cover 125 moves between the vision assembly 120 and the battery module to protect the vision assembly 120.

[0174] On the laser exit side of the galvanometer assembly 110, a galvanometer protection assembly 130 is provided. As Figure 3 shown, the galvanometer protection assembly 130 includes two air knives 131. The two air knives 131 are arranged along the laser light path direction, and the air outlet directions are both vertically downward perpendicular to the laser light path to reduce the influence of the upward splashing of the welding slag formed during the welding process on the welding process. The two air knives 131 are both mounted on the air knife fixing bracket 132. The air knife fixing bracket 132 is connected to the galvanometer assembly 110.

[0175] The optical fiber protection assembly 140 is mounted on the galvanometer assembly 110 through the second mounting member 144. As Figure 4 shown, the optical fiber guide 142 can rotate relative to the optical fiber protection frame 141. The optical fiber is externally wrapped with a washer 146 and placed in the optical fiber guide 142, and can rotate synchronously with the optical fiber guide 142. Two first sensing components 1431 are provided on the optical fiber guide 142 opposite to each other in the diameter direction, and two corresponding second sensing components 1432 are provided on the optical fiber protection frame 141 opposite to each other in the diameter direction. When the first sensing component 1431 rotates into the sensing range of the second sensing component 1432, the second sensing component 1432 can detect the position of the first sensing component 1431 and generate a detection signal indicating that the optical fiber guide 142 rotates to the limit position for limiting it. An end cap 145 is provided on the optical fiber guide 142. The end cap 145 passes through the optical fiber and the washer 146 wrapped outside the optical fiber and is fixed on the optical fiber guide 142.

[0176] The galvanometer assembly 110 and the vision assembly 120 are connected to the second actuator 150 and can be moved by the second actuator 150. As Figure 5 shown, the second actuator 150 includes a six-axis robot 151, a cable package 152, and a mounting base 153. The six-axis robot 151 is fixed through the mounting base 153 and can drive the galvanometer assembly 110 and the vision assembly 120 to move in various directions. The second actuator 150 drives the vision assembly 120 to perform imaging and ranging, and further moves the galvanometer assembly 110 to the working position according to the calibration value for offset calibration and the compensation value for defocus compensation determined by, for example Figure 9 the processor 905, to complete the offset calibration and defocus compensation and weld the target welding point.

[0177] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A laser welding device (100), characterized in that, Comprising: A galvanometer assembly (110), configured to project a laser beam towards a target welding point for laser welding; And A vision assembly (120), including a vision sensor (121) and a rangefinder (122), the vision sensor (121) being configured to determine an offset value of the galvanometer assembly (110) relative to the target welding point for offset calibration, and the rangefinder (122) being configured to determine a defocus amount of the galvanometer assembly (110) for defocus compensation.

2. The laser welding device (100) according to claim 1, characterized in that, The vision sensor (121) is configured to image a marking point on a welding object to determine the offset value of the galvanometer assembly (110).

3. The laser welding device (100) according to any one of claims 1-2, characterized in that, The rangefinder (122) is configured to measure the distance to the target welding point to determine the defocus amount of the galvanometer assembly (110).

4. The laser welding device (100) according to any one of claims 1-3, characterized in that, The vision assembly (120) further includes: A first mounting member (123), on which the vision sensor (121) and the rangefinder (122) are mounted; and A light source (124), mounted on the first mounting member (123), the light source (124) being configured to provide supplementary lighting when the vision sensor (121) images.

5. The laser welding device (100) according to claim 4, characterized in that, Further comprising: A protective cover (125), movably connected to the first mounting member (123), configured to move between the vision assembly (120) and the target welding point when the galvanometer assembly (110) performs the laser welding to protect the vision assembly (120).

6. The laser welding device (100) according to claim 5, characterized in that, Further comprising: A first actuator (126), configured to drive the protective cover (125) to move relative to the first mounting member (123) between the vision assembly (120) and the target welding point.

7. The laser welding device (100) according to any one of claims 1-6, characterized in that, Further comprising: A galvanometer protection assembly (130), located on the laser exit side of the galvanometer assembly (110), the galvanometer protection assembly (130) being configured to provide a transparent isolation layer between the laser exit side of the galvanometer assembly (110) and the target welding point to protect the galvanometer assembly (110).

8. The laser welding device (100) according to claim 7, characterized in that, The galvanometer protection assembly (130) includes: One or more air knives (131), configured to provide one or more air curtains corresponding to the light path of the laser beam projected by the galvanometer assembly (110) as the transparent isolation layer, the one or more air curtains intersecting the light path of the laser beam, and the plurality of air knives (131) being arranged in sequence along the light path of the laser beam.

9. The laser welding device (100) according to any one of claims 1-8, characterized in that, Further comprising: An optical fiber protection assembly (140), connected to the galvanometer assembly (110), configured to protect the optical fiber that transmits the laser beam to the galvanometer assembly (110).

10. The laser welding device (100) according to claim 9, characterized in that, The optical fiber protection assembly (140) includes: An optical fiber protection frame (141); An optical fiber guide (142), at least a part of the optical fiber guide (142) being nested inside the optical fiber protection frame (141) and used to guide the optical fiber to be connected to the galvanometer assembly (110), the optical fiber guide (142) being configured to be rotatable relative to the optical fiber protection frame (141); and At least one limiter (143), configured to limit the rotation range of the optical fiber guide (142) relative to the optical fiber protection frame (141).

11. The laser welding device (100) according to claim 10, characterized in that, Any one of the at least one limiter (143) includes: A first sensing component (1431), connected to the optical fiber guide (142) to rotate synchronously with the optical fiber guide (142); and A second sensing component (1432), connected to the optical fiber protection frame (141), the second sensing component (1432) and the first sensing component (1431) cooperate to detect the extreme positions of the optical fiber guide (142) relative to the optical fiber protection frame (141) for limiting positions.

12. The laser welding device (100) according to any one of claims 10-11, characterized in that, The optical fiber protection component (140) further includes: A second mounting member (144), connected to the optical fiber protection frame (141), configured to mount the optical fiber protection component (140) on the galvanometer component (110); and An end cap (145), located at one end of the optical fiber guide (142) opposite to the second mounting member (144), configured to pass through the optical fiber and be fixed to the optical fiber guide (142).

13. The laser welding device (100) according to any one of claims 1-12, characterized in that, Further includes: A second actuator (150), connected to the galvanometer component (110) and the vision component (120), configured to move the galvanometer component (110) and the vision component (120) to a working position for performing the laser welding.

14. A laser welding method, applied to the laser welding device (100) described in any one of claims 1-13, characterized in that, The laser welding method includes: Based on the offset value of the galvanometer component (110), controlling the offset calibration of the galvanometer component (110); Based on the defocus amount of the galvanometer component (110), controlling the defocus compensation of the galvanometer component (110); and Controlling the galvanometer component (110) to project laser light to the target welding point to perform the laser welding.

15. A laser welding device, characterized in that, Includes: A first module, configured to control the offset calibration of the galvanometer component (110) based on the offset value of the galvanometer component (110); A second module, configured to control the defocus compensation of the galvanometer component (110) based on the defocus amount of the galvanometer component (110); And A third module, configured to control the galvanometer component (110) to project laser light to the target welding point to perform the laser welding.

16. A computing device, characterized in that, Includes: At least one processor; And At least one memory communicatively connected to the at least one processor, the at least one memory storing instructions that, when executed alone or jointly by the at least one processor, cause the computing device to execute the method of claim 14.

17. A non-transitory computer-readable storage medium, having instructions stored thereon that, when executed alone or jointly by one or more processors of a computing device, cause the computing device to execute the method of claim 14.

18. A computer program product, including instructions that, when executed alone or jointly by one or more processors of a computing device, cause the computing device to execute the method of claim 14.

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